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Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Include/Library/EdkIIGlueBaseLib.h')
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diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Include/Library/EdkIIGlueBaseLib.h b/EDK/Foundation/Library/EdkIIGlueLib/Include/Library/EdkIIGlueBaseLib.h new file mode 100644 index 0000000..7eadcf0 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Include/Library/EdkIIGlueBaseLib.h @@ -0,0 +1,5109 @@ +/*++ + +Copyright (c) 2004 - 2006, Intel Corporation +All rights reserved. This program and the accompanying materials +are licensed and made available under the terms and conditions of the BSD License +which accompanies this distribution. The full text of the license may be found at +http://opensource.org/licenses/bsd-license.php + +THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + + +Module Name: + + EdkIIGlueBaseLib.h + +Abstract: + + Memory-only library functions with no library constructor/destructor + +--*/ + +#ifndef __EDKII_GLUE_BASE_LIB_H__ +#define __EDKII_GLUE_BASE_LIB_H__ + + +// +// String Functions +// +#define StrCpy(_Dest, _Source) GlueStrCpy(_Dest, _Source) +#define StrnCpy(_Dest, _Source, _Length) GlueStrnCpy(_Dest, _Source, _Length) +#define StrLen(_String) GlueStrLen(_String) +#define StrSize(_String) GlueStrSize(_String) +#define StrCmp(_FristString, _SecondString) GlueStrCmp(_FristString, _SecondString) +#define StrnCmp(_FirstString, _SecondString, _Length) GlueStrnCmp(_FirstString, _SecondString, _Length) +#define StrCat(_Dest, _Source) GlueStrCat(_Dest, _Source) +#define StrnCat(_Dest, _Source, _Length) GlueStrnCat(_Dest, _Source, _Length) + +// +// Linked List +// +#define InitializeListHead(_ListHead) GlueInitializeListHead(_ListHead) +#define InsertHeadList(_ListHead, _Entry ) GlueInsertHeadList(_ListHead, _Entry) +#define InsertTailList(_ListHead, _Entry) GlueInsertTailList(_ListHead, _Entry) +#define GetFirstNode(_List) GlueGetFirstNode(_List) +#define GetNextNode(_List, _Node) GlueGetNextNode(_List, _Node) +#define IsListEmpty(_ListHead) GlueIsListEmpty(_ListHead) +#define IsNull(_List, _Node) GlueIsNull(_List, _Node) +#define IsNodeAtEnd(_List, _Node) GlueIsNodeAtEnd(_List, _Node) +#define SwapListEntries(_FirstEntry, _SecondEntry) GlueSwapListEntries(_FirstEntry, _SecondEntry) +#define RemoveEntryList(_Entry) GlueRemoveEntryList(_Entry) + +// +// Math Functions +// +#define LShiftU64(_Op, _Count) GlueLShiftU64(_Op, _Count) +#define RShiftU64(_Op, _Count) GlueRShiftU64(_Op, _Count) +#define MultU64x32(_Multiplicand, _Multiplier) GlueMultU64x32(_Multiplicand, _Multiplier) +#define DivU64x32(_Dividend, _Divisor) GlueDivU64x32(_Dividend, _Divisor) + +// +// Others +// +#define GetInterruptState() GlueGetInterruptState() + + +// +// Definitions for architecture specific types +// These include SPIN_LOCK and BASE_LIBRARY_JUMP_BUFFER +// + +// +// SPIN_LOCK +// +typedef VOLATILE UINTN SPIN_LOCK; + +#if defined (MDE_CPU_IA32) +// +// IA32 context buffer used by SetJump() and LongJump() +// +typedef struct { + UINT32 Ebx; + UINT32 Esi; + UINT32 Edi; + UINT32 Ebp; + UINT32 Esp; + UINT32 Eip; +} BASE_LIBRARY_JUMP_BUFFER; + +#elif defined (MDE_CPU_IPF) +// +// IPF context buffer used by SetJump() and LongJump() +// +typedef struct { + UINT64 F2[2]; + UINT64 F3[2]; + UINT64 F4[2]; + UINT64 F5[2]; + UINT64 F16[2]; + UINT64 F17[2]; + UINT64 F18[2]; + UINT64 F19[2]; + UINT64 F20[2]; + UINT64 F21[2]; + UINT64 F22[2]; + UINT64 F23[2]; + UINT64 F24[2]; + UINT64 F25[2]; + UINT64 F26[2]; + UINT64 F27[2]; + UINT64 F28[2]; + UINT64 F29[2]; + UINT64 F30[2]; + UINT64 F31[2]; + UINT64 R4; + UINT64 R5; + UINT64 R6; + UINT64 R7; + UINT64 SP; + UINT64 BR0; + UINT64 BR1; + UINT64 BR2; + UINT64 BR3; + UINT64 BR4; + UINT64 BR5; + UINT64 InitialUNAT; + UINT64 AfterSpillUNAT; + UINT64 PFS; + UINT64 BSP; + UINT64 Predicates; + UINT64 LoopCount; + UINT64 FPSR; +} BASE_LIBRARY_JUMP_BUFFER; + +#elif defined (MDE_CPU_X64) +// +// X64 context buffer used by SetJump() and LongJump() +// +typedef struct { + UINT64 Rbx; + UINT64 Rsp; + UINT64 Rbp; + UINT64 Rdi; + UINT64 Rsi; + UINT64 R12; + UINT64 R13; + UINT64 R14; + UINT64 R15; + UINT64 Rip; +} BASE_LIBRARY_JUMP_BUFFER; + +#elif defined (MDE_CPU_EBC) +// +// EBC context buffer used by SetJump() and LongJump() +// +typedef struct { + UINT64 R0; + UINT64 R1; + UINT64 R2; + UINT64 R3; + UINT64 IP; +} BASE_LIBRARY_JUMP_BUFFER; + +#else +#error Unknown Processor Type +#endif + +// +// String Services +// + +/** + Copies one Null-terminated Unicode string to another Null-terminated Unicode + string and returns the new Unicode string. + + This function copies the contents of the Unicode string Source to the Unicode + string Destination, and returns Destination. If Source and Destination + overlap, then the results are undefined. + + If Destination is NULL, then ASSERT(). + If Source is NULL, then ASSERT(). + If Source and Destination overlap, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and Source contains more than + PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + + @param Destination Pointer to a Null-terminated Unicode string. + @param Source Pointer to a Null-terminated Unicode string. + + @return Destiantion + +**/ +CHAR16 * +EFIAPI +GlueStrCpy ( + OUT CHAR16 *Destination, + IN CONST CHAR16 *Source + ); +/** + Copies one Null-terminated Unicode string with a maximum length to another + Null-terminated Unicode string with a maximum length and returns the new + Unicode string. + + This function copies the contents of the Unicode string Source to the Unicode + string Destination, and returns Destination. At most, Length Unicode + characters are copied from Source to Destination. If Length is 0, then + Destination is returned unmodified. If Length is greater that the number of + Unicode characters in Source, then Destination is padded with Null Unicode + characters. If Source and Destination overlap, then the results are + undefined. + + If Destination is NULL, then ASSERT(). + If Source is NULL, then ASSERT(). + If Source and Destination overlap, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and Source contains more than + PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + + @param Destination Pointer to a Null-terminated Unicode string. + @param Source Pointer to a Null-terminated Unicode string. + @param Length Maximum number of Unicode characters to copy. + + @return Destination + +**/ +CHAR16 * +EFIAPI +GlueStrnCpy ( + OUT CHAR16 *Destination, + IN CONST CHAR16 *Source, + IN UINTN Length + ); +/** + Returns the length of a Null-terminated Unicode string. + + This function returns the number of Unicode characters in the Null-terminated + Unicode string specified by String. + + If String is NULL, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and String contains more than + PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + + @param String Pointer to a Null-terminated Unicode string. + + @return The length of String. + +**/ +UINTN +EFIAPI +GlueStrLen ( + IN CONST CHAR16 *String + ); +/** + Returns the size of a Null-terminated Unicode string in bytes, including the + Null terminator. + + This function returns the size, in bytes, of the Null-terminated Unicode + string specified by String. + + If String is NULL, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and String contains more than + PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + + @param String Pointer to a Null-terminated Unicode string. + + @return The size of String. + +**/ +UINTN +EFIAPI +GlueStrSize ( + IN CONST CHAR16 *String + ); +/** + Compares two Null-terminated Unicode strings, and returns the difference + between the first mismatched Unicode characters. + + This function compares the Null-terminated Unicode string FirstString to the + Null-terminated Unicode string SecondString. If FirstString is identical to + SecondString, then 0 is returned. Otherwise, the value returned is the first + mismatched Unicode character in SecondString subtracted from the first + mismatched Unicode character in FirstString. + + If FirstString is NULL, then ASSERT(). + If SecondString is NULL, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more + than PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more + than PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + + @param FirstString Pointer to a Null-terminated Unicode string. + @param SecondString Pointer to a Null-terminated Unicode string. + + @retval 0 FirstString is identical to SecondString. + @retval !=0 FirstString is not identical to SecondString. + +**/ +INTN +EFIAPI +GlueStrCmp ( + IN CONST CHAR16 *FirstString, + IN CONST CHAR16 *SecondString + ); +/** + Compares two Null-terminated Unicode strings with maximum lengths, and + returns the difference between the first mismatched Unicode characters. + + This function compares the Null-terminated Unicode string FirstString to the + Null-terminated Unicode string SecondString. At most, Length Unicode + characters will be compared. If Length is 0, then 0 is returned. If + FirstString is identical to SecondString, then 0 is returned. Otherwise, the + value returned is the first mismatched Unicode character in SecondString + subtracted from the first mismatched Unicode character in FirstString. + + If FirstString is NULL, then ASSERT(). + If SecondString is NULL, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more + than PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more + than PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + + @param FirstString Pointer to a Null-terminated Unicode string. + @param SecondString Pointer to a Null-terminated Unicode string. + @param Length Maximum number of Unicode characters to compare. + + @retval 0 FirstString is identical to SecondString. + @retval !=0 FirstString is not identical to SecondString. + +**/ +INTN +EFIAPI +GlueStrnCmp ( + IN CONST CHAR16 *FirstString, + IN CONST CHAR16 *SecondString, + IN UINTN Length + ); +/** + Concatenates one Null-terminated Unicode string to another Null-terminated + Unicode string, and returns the concatenated Unicode string. + + This function concatenates two Null-terminated Unicode strings. The contents + of Null-terminated Unicode string Source are concatenated to the end of + Null-terminated Unicode string Destination. The Null-terminated concatenated + Unicode String is returned. If Source and Destination overlap, then the + results are undefined. + + If Destination is NULL, then ASSERT(). + If Source is NULL, then ASSERT(). + If Source and Destination overlap, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and Destination contains more + than PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and Source contains more than + PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and concatenating Destination + and Source results in a Unicode string with more than + PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + + @param Destination Pointer to a Null-terminated Unicode string. + @param Source Pointer to a Null-terminated Unicode string. + + @return Destination + +**/ +CHAR16 * +EFIAPI +GlueStrCat ( + IN OUT CHAR16 *Destination, + IN CONST CHAR16 *Source + ); +/** + Concatenates one Null-terminated Unicode string with a maximum length to the + end of another Null-terminated Unicode string, and returns the concatenated + Unicode string. + + This function concatenates two Null-terminated Unicode strings. The contents + of Null-terminated Unicode string Source are concatenated to the end of + Null-terminated Unicode string Destination, and Destination is returned. At + most, Length Unicode characters are concatenated from Source to the end of + Destination, and Destination is always Null-terminated. If Length is 0, then + Destination is returned unmodified. If Source and Destination overlap, then + the results are undefined. + + If Destination is NULL, then ASSERT(). + If Source is NULL, then ASSERT(). + If Source and Destination overlap, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and Destination contains more + than PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and Source contains more than + PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + If PcdMaximumUnicodeStringLength is not zero, and concatenating Destination + and Source results in a Unicode string with more than + PcdMaximumUnicodeStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + + @param Destination Pointer to a Null-terminated Unicode string. + @param Source Pointer to a Null-terminated Unicode string. + @param Length Maximum number of Unicode characters to concatenate from + Source. + + @return Destination + +**/ +CHAR16 * +EFIAPI +GlueStrnCat ( + IN OUT CHAR16 *Destination, + IN CONST CHAR16 *Source, + IN UINTN Length + ); + +//;;## ...AMI_OVERRIDE... Support Unicode Str To Ascii Str start. +/** + Convert one Null-terminated Unicode string to a Null-terminated + ASCII string and returns the ASCII string. + + This function converts the content of the Unicode string Source + to the ASCII string Destination by copying the lower 8 bits of + each Unicode character. It returns Destination. + + If any Unicode characters in Source contain non-zero value in + the upper 8 bits, then ASSERT(). + + If Destination is NULL, then ASSERT(). + If Source is NULL, then ASSERT(). + If Source is not aligned on a 16-bit boundary, then ASSERT(). + If Source and Destination overlap, then ASSERT(). + + If PcdMaximumUnicodeStringLength is not zero, and Source contains + more than PcdMaximumUnicodeStringLength Unicode characters not including + the Null-terminator, then ASSERT(). + + If PcdMaximumAsciiStringLength is not zero, and Source contains more + than PcdMaximumAsciiStringLength Unicode characters not including the + Null-terminator, then ASSERT(). + + @param Source Pointer to a Null-terminated Unicode string. + @param Destination Pointer to a Null-terminated ASCII string. + + @reture Destination + +**/ +CHAR8 * +EFIAPI +UnicodeStrToAsciiStr ( + IN CONST CHAR16 *Source, + OUT CHAR8 *Destination + ); +//;;## ...AMI_OVERRIDE... Support Unicode Str To Ascii Str end. + +/** + Copies one Null-terminated ASCII string to another Null-terminated ASCII + string and returns the new ASCII string. + + This function copies the contents of the ASCII string Source to the ASCII + string Destination, and returns Destination. If Source and Destination + overlap, then the results are undefined. + + If Destination is NULL, then ASSERT(). + If Source is NULL, then ASSERT(). + If Source and Destination overlap, then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and Source contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + + @param Destination Pointer to a Null-terminated ASCII string. + @param Source Pointer to a Null-terminated ASCII string. + + @return Destination + +**/ +CHAR8 * +EFIAPI +AsciiStrCpy ( + OUT CHAR8 *Destination, + IN CONST CHAR8 *Source + ); +/** + Copies one Null-terminated ASCII string with a maximum length to another + Null-terminated ASCII string with a maximum length and returns the new ASCII + string. + + This function copies the contents of the ASCII string Source to the ASCII + string Destination, and returns Destination. At most, Length ASCII characters + are copied from Source to Destination. If Length is 0, then Destination is + returned unmodified. If Length is greater that the number of ASCII characters + in Source, then Destination is padded with Null ASCII characters. If Source + and Destination overlap, then the results are undefined. + + If Destination is NULL, then ASSERT(). + If Source is NULL, then ASSERT(). + If Source and Destination overlap, then ASSERT(). + If PcdMaximumAsciiStringLength is not zero, and Source contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + + @param Destination Pointer to a Null-terminated ASCII string. + @param Source Pointer to a Null-terminated ASCII string. + @param Length Maximum number of ASCII characters to copy. + + @return Destination + +**/ +CHAR8 * +EFIAPI +AsciiStrnCpy ( + OUT CHAR8 *Destination, + IN CONST CHAR8 *Source, + IN UINTN Length + ); +/** + Returns the length of a Null-terminated ASCII string. + + This function returns the number of ASCII characters in the Null-terminated + ASCII string specified by String. + + If String is NULL, then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and String contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + + @param String Pointer to a Null-terminated ASCII string. + + @return The length of String. + +**/ +UINTN +EFIAPI +AsciiStrLen ( + IN CONST CHAR8 *String + ); +/** + Returns the size of a Null-terminated ASCII string in bytes, including the + Null terminator. + + This function returns the size, in bytes, of the Null-terminated ASCII string + specified by String. + + If String is NULL, then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and String contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + + @param String Pointer to a Null-terminated ASCII string. + + @return The size of String. + +**/ +UINTN +EFIAPI +AsciiStrSize ( + IN CONST CHAR8 *String + ); +/** + Compares two Null-terminated ASCII strings, and returns the difference + between the first mismatched ASCII characters. + + This function compares the Null-terminated ASCII string FirstString to the + Null-terminated ASCII string SecondString. If FirstString is identical to + SecondString, then 0 is returned. Otherwise, the value returned is the first + mismatched ASCII character in SecondString subtracted from the first + mismatched ASCII character in FirstString. + + If FirstString is NULL, then ASSERT(). + If SecondString is NULL, then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and FirstString contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and SecondString contains more + than PcdMaximumAsciiStringLength ASCII characters not including the + Null-terminator, then ASSERT(). + + @param FirstString Pointer to a Null-terminated ASCII string. + @param SecondString Pointer to a Null-terminated ASCII string. + + @retval 0 FirstString is identical to SecondString. + @retval !=0 FirstString is not identical to SecondString. + +**/ +INTN +EFIAPI +AsciiStrCmp ( + IN CONST CHAR8 *FirstString, + IN CONST CHAR8 *SecondString + ); +/** + Performs a case insensitive comparison of two Null-terminated ASCII strings, + and returns the difference between the first mismatched ASCII characters. + + This function performs a case insensitive comparison of the Null-terminated + ASCII string FirstString to the Null-terminated ASCII string SecondString. If + FirstString is identical to SecondString, then 0 is returned. Otherwise, the + value returned is the first mismatched lower case ASCII character in + SecondString subtracted from the first mismatched lower case ASCII character + in FirstString. + + If FirstString is NULL, then ASSERT(). + If SecondString is NULL, then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and FirstString contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and SecondString contains more + than PcdMaximumAsciiStringLength ASCII characters not including the + Null-terminator, then ASSERT(). + + @param FirstString Pointer to a Null-terminated ASCII string. + @param SecondString Pointer to a Null-terminated ASCII string. + + @retval 0 FirstString is identical to SecondString using case insensitive + comparisons. + @retval !=0 FirstString is not identical to SecondString using case + insensitive comparisons. + +**/ +INTN +EFIAPI +AsciiStriCmp ( + IN CONST CHAR8 *FirstString, + IN CONST CHAR8 *SecondString + ); +/** + Compares two Null-terminated ASCII strings with maximum lengths, and returns + the difference between the first mismatched ASCII characters. + + This function compares the Null-terminated ASCII string FirstString to the + Null-terminated ASCII string SecondString. At most, Length ASCII characters + will be compared. If Length is 0, then 0 is returned. If FirstString is + identical to SecondString, then 0 is returned. Otherwise, the value returned + is the first mismatched ASCII character in SecondString subtracted from the + first mismatched ASCII character in FirstString. + + If FirstString is NULL, then ASSERT(). + If SecondString is NULL, then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and FirstString contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and SecondString contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + + @param FirstString Pointer to a Null-terminated ASCII string. + @param SecondString Pointer to a Null-terminated ASCII string. + + @retval 0 FirstString is identical to SecondString. + @retval !=0 FirstString is not identical to SecondString. + +**/ +INTN +EFIAPI +AsciiStrnCmp ( + IN CONST CHAR8 *FirstString, + IN CONST CHAR8 *SecondString, + IN UINTN Length + ); +/** + Concatenates one Null-terminated ASCII string to another Null-terminated + ASCII string, and returns the concatenated ASCII string. + + This function concatenates two Null-terminated ASCII strings. The contents of + Null-terminated ASCII string Source are concatenated to the end of Null- + terminated ASCII string Destination. The Null-terminated concatenated ASCII + String is returned. + + If Destination is NULL, then ASSERT(). + If Source is NULL, then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and Destination contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and Source contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + If PcdMaximumAsciiStringLength is not zero and concatenating Destination and + Source results in a ASCII string with more than PcdMaximumAsciiStringLength + ASCII characters, then ASSERT(). + + @param Destination Pointer to a Null-terminated ASCII string. + @param Source Pointer to a Null-terminated ASCII string. + + @return Destination + +**/ +CHAR8 * +EFIAPI +AsciiStrCat ( + IN OUT CHAR8 *Destination, + IN CONST CHAR8 *Source + ); +/** + Concatenates one Null-terminated ASCII string with a maximum length to the + end of another Null-terminated ASCII string, and returns the concatenated + ASCII string. + + This function concatenates two Null-terminated ASCII strings. The contents + of Null-terminated ASCII string Source are concatenated to the end of Null- + terminated ASCII string Destination, and Destination is returned. At most, + Length ASCII characters are concatenated from Source to the end of + Destination, and Destination is always Null-terminated. If Length is 0, then + Destination is returned unmodified. If Source and Destination overlap, then + the results are undefined. + + If Destination is NULL, then ASSERT(). + If Source is NULL, then ASSERT(). + If Source and Destination overlap, then ASSERT(). + If PcdMaximumAsciiStringLength is not zero, and Destination contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + If PcdMaximumAsciiStringLength is not zero, and Source contains more than + PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, + then ASSERT(). + If PcdMaximumAsciiStringLength is not zero, and concatenating Destination and + Source results in a ASCII string with more than PcdMaximumAsciiStringLength + ASCII characters not including the Null-terminator, then ASSERT(). + + @param Destination Pointer to a Null-terminated ASCII string. + @param Source Pointer to a Null-terminated ASCII string. + @param Length Maximum number of ASCII characters to concatenate from + Source. + + @return Destination + +**/ +CHAR8 * +EFIAPI +AsciiStrnCat ( + IN OUT CHAR8 *Destination, + IN CONST CHAR8 *Source, + IN UINTN Length + ); +/** + Converts an 8-bit value to an 8-bit BCD value. + + Converts the 8-bit value specified by Value to BCD. The BCD value is + returned. + + If Value >= 100, then ASSERT(). + + @param Value The 8-bit value to convert to BCD. Range 0..99. + + @return The BCD value + +**/ +UINT8 +EFIAPI +DecimalToBcd8 ( + IN UINT8 Value + ); + +/** + Converts an 8-bit BCD value to an 8-bit value. + + Converts the 8-bit BCD value specified by Value to an 8-bit value. The 8-bit + value is returned. + + If Value >= 0xA0, then ASSERT(). + If (Value & 0x0F) >= 0x0A, then ASSERT(). + + @param Value The 8-bit BCD value to convert to an 8-bit value. + + @return The 8-bit value is returned. + +**/ +UINT8 +EFIAPI +BcdToDecimal8 ( + IN UINT8 Value + ); + +// +// LIST_ENTRY definition +// +typedef struct _LIST_ENTRY LIST_ENTRY; + +struct _LIST_ENTRY { + LIST_ENTRY *ForwardLink; + LIST_ENTRY *BackLink; +}; + +// +// Linked List Functions and Macros +// + +/** + Initializes the head node of a doubly linked list that is declared as a + global variable in a module. + + Initializes the forward and backward links of a new linked list. After + initializing a linked list with this macro, the other linked list functions + may be used to add and remove nodes from the linked list. This macro results + in smaller executables by initializing the linked list in the data section, + instead if calling the InitializeListHead() function to perform the + equivalent operation. + + @param ListHead The head note of a list to initiailize. + +**/ +#define INITIALIZE_LIST_HEAD_VARIABLE(ListHead) {&ListHead, &ListHead} + +/** + Initializes the head node of a doubly linked list, and returns the pointer to + the head node of the doubly linked list. + + Initializes the forward and backward links of a new linked list. After + initializing a linked list with this function, the other linked list + functions may be used to add and remove nodes from the linked list. It is up + to the caller of this function to allocate the memory for ListHead. + + If ListHead is NULL, then ASSERT(). + + @param ListHead A pointer to the head node of a new doubly linked list. + + @return ListHead + +**/ +LIST_ENTRY * +EFIAPI +GlueInitializeListHead ( + IN LIST_ENTRY *ListHead + ); + +/** + Adds a node to the beginning of a doubly linked list, and returns the pointer + to the head node of the doubly linked list. + + Adds the node Entry at the beginning of the doubly linked list denoted by + ListHead, and returns ListHead. + + If ListHead is NULL, then ASSERT(). + If Entry is NULL, then ASSERT(). + If ListHead was not initialized with InitializeListHead(), then ASSERT(). + If PcdMaximumLinkedListLenth is not zero, and prior to insertion the number + of nodes in ListHead, including the ListHead node, is greater than or + equal to PcdMaximumLinkedListLength, then ASSERT(). + + @param ListHead A pointer to the head node of a doubly linked list. + @param Entry A pointer to a node that is to be inserted at the beginning + of a doubly linked list. + + @return ListHead + +**/ +LIST_ENTRY * +EFIAPI +GlueInsertHeadList ( + IN LIST_ENTRY *ListHead, + IN LIST_ENTRY *Entry + ); + +/** + Adds a node to the end of a doubly linked list, and returns the pointer to + the head node of the doubly linked list. + + Adds the node Entry to the end of the doubly linked list denoted by ListHead, + and returns ListHead. + + If ListHead is NULL, then ASSERT(). + If Entry is NULL, then ASSERT(). + If ListHead was not initialized with InitializeListHead(), then ASSERT(). + If PcdMaximumLinkedListLenth is not zero, and prior to insertion the number + of nodes in ListHead, including the ListHead node, is greater than or + equal to PcdMaximumLinkedListLength, then ASSERT(). + + @param ListHead A pointer to the head node of a doubly linked list. + @param Entry A pointer to a node that is to be added at the end of the + doubly linked list. + + @return ListHead + +**/ +LIST_ENTRY * +EFIAPI +GlueInsertTailList ( + IN LIST_ENTRY *ListHead, + IN LIST_ENTRY *Entry + ); + +/** + Retrieves the first node of a doubly linked list. + + Returns the first node of a doubly linked list. List must have been + initialized with InitializeListHead(). If List is empty, then NULL is + returned. + + If List is NULL, then ASSERT(). + If List was not initialized with InitializeListHead(), then ASSERT(). + If PcdMaximumLinkedListLenth is not zero, and the number of nodes + in List, including the List node, is greater than or equal to + PcdMaximumLinkedListLength, then ASSERT(). + + @param List A pointer to the head node of a doubly linked list. + + @return The first node of a doubly linked list. + @retval NULL The list is empty. + +**/ +LIST_ENTRY * +EFIAPI +GlueGetFirstNode ( + IN CONST LIST_ENTRY *List + ); + +/** + Retrieves the next node of a doubly linked list. + + Returns the node of a doubly linked list that follows Node. List must have + been initialized with InitializeListHead(). If List is empty, then List is + returned. + + If List is NULL, then ASSERT(). + If Node is NULL, then ASSERT(). + If List was not initialized with InitializeListHead(), then ASSERT(). + If PcdMaximumLinkedListLenth is not zero, and List contains more than + PcdMaximumLinkedListLenth nodes, then ASSERT(). + If Node is not a node in List, then ASSERT(). + + @param List A pointer to the head node of a doubly linked list. + @param Node A pointer to a node in the doubly linked list. + + @return Pointer to the next node if one exists. Otherwise a null value which + is actually List is returned. + +**/ +LIST_ENTRY * +EFIAPI +GlueGetNextNode ( + IN CONST LIST_ENTRY *List, + IN CONST LIST_ENTRY *Node + ); + +/** + Checks to see if a doubly linked list is empty or not. + + Checks to see if the doubly linked list is empty. If the linked list contains + zero nodes, this function returns TRUE. Otherwise, it returns FALSE. + + If ListHead is NULL, then ASSERT(). + If ListHead was not initialized with InitializeListHead(), then ASSERT(). + If PcdMaximumLinkedListLenth is not zero, and the number of nodes + in List, including the List node, is greater than or equal to + PcdMaximumLinkedListLength, then ASSERT(). + + @param ListHead A pointer to the head node of a doubly linked list. + + @retval TRUE The linked list is empty. + @retval FALSE The linked list is not empty. + +**/ +BOOLEAN +EFIAPI +GlueIsListEmpty ( + IN CONST LIST_ENTRY *ListHead + ); + +/** + Determines if a node in a doubly linked list is null. + + Returns FALSE if Node is one of the nodes in the doubly linked list specified + by List. Otherwise, TRUE is returned. List must have been initialized with + InitializeListHead(). + + If List is NULL, then ASSERT(). + If Node is NULL, then ASSERT(). + If List was not initialized with InitializeListHead(), then ASSERT(). + If PcdMaximumLinkedListLenth is not zero, and the number of nodes + in List, including the List node, is greater than or equal to + PcdMaximumLinkedListLength, then ASSERT(). + If Node is not a node in List and Node is not equal to List, then ASSERT(). + + @param List A pointer to the head node of a doubly linked list. + @param Node A pointer to a node in the doubly linked list. + + @retval TRUE Node is one of the nodes in the doubly linked list. + @retval FALSE Node is not one of the nodes in the doubly linked list. + +**/ +BOOLEAN +EFIAPI +GlueIsNull ( + IN CONST LIST_ENTRY *List, + IN CONST LIST_ENTRY *Node + ); + +/** + Determines if a node the last node in a doubly linked list. + + Returns TRUE if Node is the last node in the doubly linked list specified by + List. Otherwise, FALSE is returned. List must have been initialized with + InitializeListHead(). + + If List is NULL, then ASSERT(). + If Node is NULL, then ASSERT(). + If List was not initialized with InitializeListHead(), then ASSERT(). + If PcdMaximumLinkedListLenth is not zero, and the number of nodes + in List, including the List node, is greater than or equal to + PcdMaximumLinkedListLength, then ASSERT(). + If Node is not a node in List, then ASSERT(). + + @param List A pointer to the head node of a doubly linked list. + @param Node A pointer to a node in the doubly linked list. + + @retval TRUE Node is the last node in the linked list. + @retval FALSE Node is not the last node in the linked list. + +**/ +BOOLEAN +EFIAPI +GlueIsNodeAtEnd ( + IN CONST LIST_ENTRY *List, + IN CONST LIST_ENTRY *Node + ); + +/** + Swaps the location of two nodes in a doubly linked list, and returns the + first node after the swap. + + If FirstEntry is identical to SecondEntry, then SecondEntry is returned. + Otherwise, the location of the FirstEntry node is swapped with the location + of the SecondEntry node in a doubly linked list. SecondEntry must be in the + same double linked list as FirstEntry and that double linked list must have + been initialized with InitializeListHead(). SecondEntry is returned after the + nodes are swapped. + + If FirstEntry is NULL, then ASSERT(). + If SecondEntry is NULL, then ASSERT(). + If SecondEntry and FirstEntry are not in the same linked list, then ASSERT(). + If PcdMaximumLinkedListLength is not zero, and the number of nodes in the + linked list containing the FirstEntry and SecondEntry nodes, including + the FirstEntry and SecondEntry nodes, is greater than or equal to + PcdMaximumLinkedListLength, then ASSERT(). + + @param FirstEntry A pointer to a node in a linked list. + @param SecondEntry A pointer to another node in the same linked list. + +**/ +LIST_ENTRY * +EFIAPI +GlueSwapListEntries ( + IN LIST_ENTRY *FirstEntry, + IN LIST_ENTRY *SecondEntry + ); + +/** + Removes a node from a doubly linked list, and returns the node that follows + the removed node. + + Removes the node Entry from a doubly linked list. It is up to the caller of + this function to release the memory used by this node if that is required. On + exit, the node following Entry in the doubly linked list is returned. If + Entry is the only node in the linked list, then the head node of the linked + list is returned. + + If Entry is NULL, then ASSERT(). + If Entry is the head node of an empty list, then ASSERT(). + If PcdMaximumLinkedListLength is not zero, and the number of nodes in the + linked list containing Entry, including the Entry node, is greater than + or equal to PcdMaximumLinkedListLength, then ASSERT(). + + @param Entry A pointer to a node in a linked list + + @return Entry + +**/ +LIST_ENTRY * +EFIAPI +GlueRemoveEntryList ( + IN CONST LIST_ENTRY *Entry + ); + +// +// Math Services +// + +/** + Shifts a 64-bit integer left between 0 and 63 bits. The low bits are filled + with zeros. The shifted value is returned. + + This function shifts the 64-bit value Operand to the left by Count bits. The + low Count bits are set to zero. The shifted value is returned. + + If Count is greater than 63, then ASSERT(). + + @param Operand The 64-bit operand to shift left. + @param Count The number of bits to shift left. + + @return Operand << Count + +**/ +UINT64 +EFIAPI +GlueLShiftU64 ( + IN UINT64 Operand, + IN UINTN Count + ); + +/** + Shifts a 64-bit integer right between 0 and 63 bits. This high bits are + filled with zeros. The shifted value is returned. + + This function shifts the 64-bit value Operand to the right by Count bits. The + high Count bits are set to zero. The shifted value is returned. + + If Count is greater than 63, then ASSERT(). + + @param Operand The 64-bit operand to shift right. + @param Count The number of bits to shift right. + + @return Operand >> Count + +**/ +UINT64 +EFIAPI +GlueRShiftU64 ( + IN UINT64 Operand, + IN UINTN Count + ); + +/** + Shifts a 64-bit integer right between 0 and 63 bits. The high bits are filled + with original integer's bit 63. The shifted value is returned. + + This function shifts the 64-bit value Operand to the right by Count bits. The + high Count bits are set to bit 63 of Operand. The shifted value is returned. + + If Count is greater than 63, then ASSERT(). + + @param Operand The 64-bit operand to shift right. + @param Count The number of bits to shift right. + + @return Operand >> Count + +**/ +UINT64 +EFIAPI +ARShiftU64 ( + IN UINT64 Operand, + IN UINTN Count + ); + +/** + Rotates a 32-bit integer left between 0 and 31 bits, filling the low bits + with the high bits that were rotated. + + This function rotates the 32-bit value Operand to the left by Count bits. The + low Count bits are fill with the high Count bits of Operand. The rotated + value is returned. + + If Count is greater than 31, then ASSERT(). + + @param Operand The 32-bit operand to rotate left. + @param Count The number of bits to rotate left. + + @return Operand <<< Count + +**/ +UINT32 +EFIAPI +LRotU32 ( + IN UINT32 Operand, + IN UINTN Count + ); + +/** + Rotates a 32-bit integer right between 0 and 31 bits, filling the high bits + with the low bits that were rotated. + + This function rotates the 32-bit value Operand to the right by Count bits. + The high Count bits are fill with the low Count bits of Operand. The rotated + value is returned. + + If Count is greater than 31, then ASSERT(). + + @param Operand The 32-bit operand to rotate right. + @param Count The number of bits to rotate right. + + @return Operand >>> Count + +**/ +UINT32 +EFIAPI +RRotU32 ( + IN UINT32 Operand, + IN UINTN Count + ); + +/** + Rotates a 64-bit integer left between 0 and 63 bits, filling the low bits + with the high bits that were rotated. + + This function rotates the 64-bit value Operand to the left by Count bits. The + low Count bits are fill with the high Count bits of Operand. The rotated + value is returned. + + If Count is greater than 63, then ASSERT(). + + @param Operand The 64-bit operand to rotate left. + @param Count The number of bits to rotate left. + + @return Operand <<< Count + +**/ +UINT64 +EFIAPI +LRotU64 ( + IN UINT64 Operand, + IN UINTN Count + ); + +/** + Rotates a 64-bit integer right between 0 and 63 bits, filling the high bits + with the high low bits that were rotated. + + This function rotates the 64-bit value Operand to the right by Count bits. + The high Count bits are fill with the low Count bits of Operand. The rotated + value is returned. + + If Count is greater than 63, then ASSERT(). + + @param Operand The 64-bit operand to rotate right. + @param Count The number of bits to rotate right. + + @return Operand >>> Count + +**/ +UINT64 +EFIAPI +RRotU64 ( + IN UINT64 Operand, + IN UINTN Count + ); + +/** + Returns the bit position of the lowest bit set in a 32-bit value. + + This function computes the bit position of the lowest bit set in the 32-bit + value specified by Operand. If Operand is zero, then -1 is returned. + Otherwise, a value between 0 and 31 is returned. + + @param Operand The 32-bit operand to evaluate. + + @return Position of the lowest bit set in Operand if found. + @retval -1 Operand is zero. + +**/ +INTN +EFIAPI +LowBitSet32 ( + IN UINT32 Operand + ); + +/** + Returns the bit position of the lowest bit set in a 64-bit value. + + This function computes the bit position of the lowest bit set in the 64-bit + value specified by Operand. If Operand is zero, then -1 is returned. + Otherwise, a value between 0 and 63 is returned. + + @param Operand The 64-bit operand to evaluate. + + @return Position of the lowest bit set in Operand if found. + @retval -1 Operand is zero. + +**/ +INTN +EFIAPI +LowBitSet64 ( + IN UINT64 Operand + ); + +/** + Returns the bit position of the highest bit set in a 32-bit value. Equivalent + to log2(x). + + This function computes the bit position of the highest bit set in the 32-bit + value specified by Operand. If Operand is zero, then -1 is returned. + Otherwise, a value between 0 and 31 is returned. + + @param Operand The 32-bit operand to evaluate. + + @return Position of the highest bit set in Operand if found. + @retval -1 Operand is zero. + +**/ +INTN +EFIAPI +HighBitSet32 ( + IN UINT32 Operand + ); + +/** + Returns the bit position of the highest bit set in a 64-bit value. Equivalent + to log2(x). + + This function computes the bit position of the highest bit set in the 64-bit + value specified by Operand. If Operand is zero, then -1 is returned. + Otherwise, a value between 0 and 63 is returned. + + @param Operand The 64-bit operand to evaluate. + + @return Position of the highest bit set in Operand if found. + @retval -1 Operand is zero. + +**/ +INTN +EFIAPI +HighBitSet64 ( + IN UINT64 Operand + ); + +/** + Returns the value of the highest bit set in a 32-bit value. Equivalent to + 1 << HighBitSet32(x). + + This function computes the value of the highest bit set in the 32-bit value + specified by Operand. If Operand is zero, then zero is returned. + + @param Operand The 32-bit operand to evaluate. + + @return 1 << HighBitSet32(Operand) + @retval 0 Operand is zero. + +**/ +UINT32 +EFIAPI +GetPowerOfTwo32 ( + IN UINT32 Operand + ); + +/** + Returns the value of the highest bit set in a 64-bit value. Equivalent to + 1 << HighBitSet64(x). + + This function computes the value of the highest bit set in the 64-bit value + specified by Operand. If Operand is zero, then zero is returned. + + @param Operand The 64-bit operand to evaluate. + + @return 1 << HighBitSet64(Operand) + @retval 0 Operand is zero. + +**/ +UINT64 +EFIAPI +GetPowerOfTwo64 ( + IN UINT64 Operand + ); + +/** + Switches the endianess of a 16-bit integer. + + This function swaps the bytes in a 16-bit unsigned value to switch the value + from little endian to big endian or vice versa. The byte swapped value is + returned. + + @param Operand A 16-bit unsigned value. + + @return The byte swaped Operand. + +**/ +UINT16 +EFIAPI +SwapBytes16 ( + IN UINT16 Value + ); + +/** + Switches the endianess of a 32-bit integer. + + This function swaps the bytes in a 32-bit unsigned value to switch the value + from little endian to big endian or vice versa. The byte swapped value is + returned. + + @param Operand A 32-bit unsigned value. + + @return The byte swaped Operand. + +**/ +UINT32 +EFIAPI +SwapBytes32 ( + IN UINT32 Value + ); + +/** + Switches the endianess of a 64-bit integer. + + This function swaps the bytes in a 64-bit unsigned value to switch the value + from little endian to big endian or vice versa. The byte swapped value is + returned. + + @param Operand A 64-bit unsigned value. + + @return The byte swaped Operand. + +**/ +UINT64 +EFIAPI +SwapBytes64 ( + IN UINT64 Value + ); + +/** + Multiples a 64-bit unsigned integer by a 32-bit unsigned integer and + generates a 64-bit unsigned result. + + This function multiples the 64-bit unsigned value Multiplicand by the 32-bit + unsigned value Multiplier and generates a 64-bit unsigned result. This 64- + bit unsigned result is returned. + + If the result overflows, then ASSERT(). + + @param Multiplicand A 64-bit unsigned value. + @param Multiplier A 32-bit unsigned value. + + @return Multiplicand * Multiplier + +**/ +UINT64 +EFIAPI +GlueMultU64x32 ( + IN UINT64 Multiplicand, + IN UINT32 Multiplier + ); + +/** + Multiples a 64-bit unsigned integer by a 64-bit unsigned integer and + generates a 64-bit unsigned result. + + This function multiples the 64-bit unsigned value Multiplicand by the 64-bit + unsigned value Multiplier and generates a 64-bit unsigned result. This 64- + bit unsigned result is returned. + + If the result overflows, then ASSERT(). + + @param Multiplicand A 64-bit unsigned value. + @param Multiplier A 64-bit unsigned value. + + @return Multiplicand * Multiplier + +**/ +UINT64 +EFIAPI +MultU64x64 ( + IN UINT64 Multiplicand, + IN UINT64 Multiplier + ); + +/** + Multiples a 64-bit signed integer by a 64-bit signed integer and generates a + 64-bit signed result. + + This function multiples the 64-bit signed value Multiplicand by the 64-bit + signed value Multiplier and generates a 64-bit signed result. This 64-bit + signed result is returned. + + If the result overflows, then ASSERT(). + + @param Multiplicand A 64-bit signed value. + @param Multiplier A 64-bit signed value. + + @return Multiplicand * Multiplier + +**/ +INT64 +EFIAPI +MultS64x64 ( + IN INT64 Multiplicand, + IN INT64 Multiplier + ); + +/** + Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates + a 64-bit unsigned result. + + This function divides the 64-bit unsigned value Dividend by the 32-bit + unsigned value Divisor and generates a 64-bit unsigned quotient. This + function returns the 64-bit unsigned quotient. + + If Divisor is 0, then ASSERT(). + + @param Dividend A 64-bit unsigned value. + @param Divisor A 32-bit unsigned value. + + @return Dividend / Divisor + +**/ +UINT64 +EFIAPI +GlueDivU64x32 ( + IN UINT64 Dividend, + IN UINT32 Divisor + ); + +/** + Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates + a 32-bit unsigned remainder. + + This function divides the 64-bit unsigned value Dividend by the 32-bit + unsigned value Divisor and generates a 32-bit remainder. This function + returns the 32-bit unsigned remainder. + + If Divisor is 0, then ASSERT(). + + @param Dividend A 64-bit unsigned value. + @param Divisor A 32-bit unsigned value. + + @return Dividend % Divisor + +**/ +UINT32 +EFIAPI +ModU64x32 ( + IN UINT64 Dividend, + IN UINT32 Divisor + ); + +/** + Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates + a 64-bit unsigned result and an optional 32-bit unsigned remainder. + + This function divides the 64-bit unsigned value Dividend by the 32-bit + unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder + is not NULL, then the 32-bit unsigned remainder is returned in Remainder. + This function returns the 64-bit unsigned quotient. + + If Divisor is 0, then ASSERT(). + + @param Dividend A 64-bit unsigned value. + @param Divisor A 32-bit unsigned value. + @param Remainder A pointer to a 32-bit unsigned value. This parameter is + optional and may be NULL. + + @return Dividend / Divisor + +**/ +UINT64 +EFIAPI +DivU64x32Remainder ( + IN UINT64 Dividend, + IN UINT32 Divisor, + OUT UINT32 *Remainder OPTIONAL + ); + +/** + Divides a 64-bit unsigned integer by a 64-bit unsigned integer and generates + a 64-bit unsigned result and an optional 64-bit unsigned remainder. + + This function divides the 64-bit unsigned value Dividend by the 64-bit + unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder + is not NULL, then the 64-bit unsigned remainder is returned in Remainder. + This function returns the 64-bit unsigned quotient. + + If Divisor is 0, then ASSERT(). + + @param Dividend A 64-bit unsigned value. + @param Divisor A 64-bit unsigned value. + @param Remainder A pointer to a 64-bit unsigned value. This parameter is + optional and may be NULL. + + @return Dividend / Divisor + +**/ +UINT64 +EFIAPI +DivU64x64Remainder ( + IN UINT64 Dividend, + IN UINT64 Divisor, + OUT UINT64 *Remainder OPTIONAL + ); + +/** + Divides a 64-bit signed integer by a 64-bit signed integer and generates a + 64-bit signed result and a optional 64-bit signed remainder. + + This function divides the 64-bit signed value Dividend by the 64-bit signed + value Divisor and generates a 64-bit signed quotient. If Remainder is not + NULL, then the 64-bit signed remainder is returned in Remainder. This + function returns the 64-bit signed quotient. + + If Divisor is 0, then ASSERT(). + + @param Dividend A 64-bit signed value. + @param Divisor A 64-bit signed value. + @param Remainder A pointer to a 64-bit signed value. This parameter is + optional and may be NULL. + + @return Dividend / Divisor + +**/ +INT64 +EFIAPI +DivS64x64Remainder ( + IN INT64 Dividend, + IN INT64 Divisor, + OUT INT64 *Remainder OPTIONAL + ); + +/** + Reads a 16-bit value from memory that may be unaligned. + + This function returns the 16-bit value pointed to by Buffer. The function + guarantees that the read operation does not produce an alignment fault. + + If the Buffer is NULL, then ASSERT(). + + @param Buffer Pointer to a 16-bit value that may be unaligned. + + @return *Uint16 + +**/ +UINT16 +EFIAPI +ReadUnaligned16 ( + IN CONST UINT16 *Uint16 + ); + +/** + Writes a 16-bit value to memory that may be unaligned. + + This function writes the 16-bit value specified by Value to Buffer. Value is + returned. The function guarantees that the write operation does not produce + an alignment fault. + + If the Buffer is NULL, then ASSERT(). + + @param Buffer Pointer to a 16-bit value that may be unaligned. + @param Value 16-bit value to write to Buffer. + + @return Value + +**/ +UINT16 +EFIAPI +WriteUnaligned16 ( + OUT UINT16 *Uint16, + IN UINT16 Value + ); + +/** + Reads a 24-bit value from memory that may be unaligned. + + This function returns the 24-bit value pointed to by Buffer. The function + guarantees that the read operation does not produce an alignment fault. + + If the Buffer is NULL, then ASSERT(). + + @param Buffer Pointer to a 24-bit value that may be unaligned. + + @return The value read. + +**/ +UINT32 +EFIAPI +ReadUnaligned24 ( + IN CONST UINT32 *Buffer + ); + +/** + Writes a 24-bit value to memory that may be unaligned. + + This function writes the 24-bit value specified by Value to Buffer. Value is + returned. The function guarantees that the write operation does not produce + an alignment fault. + + If the Buffer is NULL, then ASSERT(). + + @param Buffer Pointer to a 24-bit value that may be unaligned. + @param Value 24-bit value to write to Buffer. + + @return The value written. + +**/ +UINT32 +EFIAPI +WriteUnaligned24 ( + OUT UINT32 *Buffer, + IN UINT32 Value + ); + +/** + Reads a 32-bit value from memory that may be unaligned. + + This function returns the 32-bit value pointed to by Buffer. The function + guarantees that the read operation does not produce an alignment fault. + + If the Buffer is NULL, then ASSERT(). + + @param Buffer Pointer to a 32-bit value that may be unaligned. + + @return *Uint32 + +**/ +UINT32 +EFIAPI +ReadUnaligned32 ( + IN CONST UINT32 *Uint32 + ); + +/** + Writes a 32-bit value to memory that may be unaligned. + + This function writes the 32-bit value specified by Value to Buffer. Value is + returned. The function guarantees that the write operation does not produce + an alignment fault. + + If the Buffer is NULL, then ASSERT(). + + @param Buffer Pointer to a 32-bit value that may be unaligned. + @param Value 32-bit value to write to Buffer. + + @return Value + +**/ +UINT32 +EFIAPI +WriteUnaligned32 ( + OUT UINT32 *Uint32, + IN UINT32 Value + ); + +/** + Reads a 64-bit value from memory that may be unaligned. + + This function returns the 64-bit value pointed to by Buffer. The function + guarantees that the read operation does not produce an alignment fault. + + If the Buffer is NULL, then ASSERT(). + + @param Buffer Pointer to a 64-bit value that may be unaligned. + + @return *Uint64 + +**/ +UINT64 +EFIAPI +ReadUnaligned64 ( + IN CONST UINT64 *Uint64 + ); + +/** + Writes a 64-bit value to memory that may be unaligned. + + This function writes the 64-bit value specified by Value to Buffer. Value is + returned. The function guarantees that the write operation does not produce + an alignment fault. + + If the Buffer is NULL, then ASSERT(). + + @param Buffer Pointer to a 64-bit value that may be unaligned. + @param Value 64-bit value to write to Buffer. + + @return Value + +**/ +UINT64 +EFIAPI +WriteUnaligned64 ( + OUT UINT64 *Uint64, + IN UINT64 Value + ); + +// +// Bit Field Functions +// + +/** + Returns a bit field from an 8-bit value. + + Returns the bitfield specified by the StartBit and the EndBit from Operand. + + If 8-bit operations are not supported, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..7. + + @return The bit field read. + +**/ +UINT8 +EFIAPI +BitFieldRead8 ( + IN UINT8 Operand, + IN UINTN StartBit, + IN UINTN EndBit + ); + +/** + Writes a bit field to an 8-bit value, and returns the result. + + Writes Value to the bit field specified by the StartBit and the EndBit in + Operand. All other bits in Operand are preserved. The new 8-bit value is + returned. + + If 8-bit operations are not supported, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..7. + @param Value New value of the bit field. + + @return The new 8-bit value. + +**/ +UINT8 +EFIAPI +BitFieldWrite8 ( + IN UINT8 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 Value + ); + +/** + Reads a bit field from an 8-bit value, performs a bitwise OR, and returns the + result. + + Performs a bitwise inclusive OR between the bit field specified by StartBit + and EndBit in Operand and the value specified by OrData. All other bits in + Operand are preserved. The new 8-bit value is returned. + + If 8-bit operations are not supported, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..7. + @param OrData The value to OR with the read value from the value + + @return The new 8-bit value. + +**/ +UINT8 +EFIAPI +BitFieldOr8 ( + IN UINT8 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 OrData + ); + +/** + Reads a bit field from an 8-bit value, performs a bitwise AND, and returns + the result. + + Performs a bitwise AND between the bit field specified by StartBit and EndBit + in Operand and the value specified by AndData. All other bits in Operand are + preserved. The new 8-bit value is returned. + + If 8-bit operations are not supported, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..7. + @param AndData The value to AND with the read value from the value. + + @return The new 8-bit value. + +**/ +UINT8 +EFIAPI +BitFieldAnd8 ( + IN UINT8 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 AndData + ); + +/** + Reads a bit field from an 8-bit value, performs a bitwise AND followed by a + bitwise OR, and returns the result. + + Performs a bitwise AND between the bit field specified by StartBit and EndBit + in Operand and the value specified by AndData, followed by a bitwise + inclusive OR with value specified by OrData. All other bits in Operand are + preserved. The new 8-bit value is returned. + + If 8-bit operations are not supported, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..7. + @param AndData The value to AND with the read value from the value. + @param OrData The value to OR with the result of the AND operation. + + @return The new 8-bit value. + +**/ +UINT8 +EFIAPI +BitFieldAndThenOr8 ( + IN UINT8 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 AndData, + IN UINT8 OrData + ); + +/** + Returns a bit field from a 16-bit value. + + Returns the bitfield specified by the StartBit and the EndBit from Operand. + + If 16-bit operations are not supported, then ASSERT(). + If StartBit is greater than 15, then ASSERT(). + If EndBit is greater than 15, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..15. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..15. + + @return The bit field read. + +**/ +UINT16 +EFIAPI +BitFieldRead16 ( + IN UINT16 Operand, + IN UINTN StartBit, + IN UINTN EndBit + ); + +/** + Writes a bit field to a 16-bit value, and returns the result. + + Writes Value to the bit field specified by the StartBit and the EndBit in + Operand. All other bits in Operand are preserved. The new 16-bit value is + returned. + + If 16-bit operations are not supported, then ASSERT(). + If StartBit is greater than 15, then ASSERT(). + If EndBit is greater than 15, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..15. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..15. + @param Value New value of the bit field. + + @return The new 16-bit value. + +**/ +UINT16 +EFIAPI +BitFieldWrite16 ( + IN UINT16 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 Value + ); + +/** + Reads a bit field from a 16-bit value, performs a bitwise OR, and returns the + result. + + Performs a bitwise inclusive OR between the bit field specified by StartBit + and EndBit in Operand and the value specified by OrData. All other bits in + Operand are preserved. The new 16-bit value is returned. + + If 16-bit operations are not supported, then ASSERT(). + If StartBit is greater than 15, then ASSERT(). + If EndBit is greater than 15, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..15. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..15. + @param OrData The value to OR with the read value from the value + + @return The new 16-bit value. + +**/ +UINT16 +EFIAPI +BitFieldOr16 ( + IN UINT16 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 OrData + ); + +/** + Reads a bit field from a 16-bit value, performs a bitwise AND, and returns + the result. + + Performs a bitwise AND between the bit field specified by StartBit and EndBit + in Operand and the value specified by AndData. All other bits in Operand are + preserved. The new 16-bit value is returned. + + If 16-bit operations are not supported, then ASSERT(). + If StartBit is greater than 15, then ASSERT(). + If EndBit is greater than 15, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..15. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..15. + @param AndData The value to AND with the read value from the value + + @return The new 16-bit value. + +**/ +UINT16 +EFIAPI +BitFieldAnd16 ( + IN UINT16 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 AndData + ); + +/** + Reads a bit field from a 16-bit value, performs a bitwise AND followed by a + bitwise OR, and returns the result. + + Performs a bitwise AND between the bit field specified by StartBit and EndBit + in Operand and the value specified by AndData, followed by a bitwise + inclusive OR with value specified by OrData. All other bits in Operand are + preserved. The new 16-bit value is returned. + + If 16-bit operations are not supported, then ASSERT(). + If StartBit is greater than 15, then ASSERT(). + If EndBit is greater than 15, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..15. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..15. + @param AndData The value to AND with the read value from the value. + @param OrData The value to OR with the result of the AND operation. + + @return The new 16-bit value. + +**/ +UINT16 +EFIAPI +BitFieldAndThenOr16 ( + IN UINT16 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 AndData, + IN UINT16 OrData + ); + +/** + Returns a bit field from a 32-bit value. + + Returns the bitfield specified by the StartBit and the EndBit from Operand. + + If 32-bit operations are not supported, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + + @return The bit field read. + +**/ +UINT32 +EFIAPI +BitFieldRead32 ( + IN UINT32 Operand, + IN UINTN StartBit, + IN UINTN EndBit + ); + +/** + Writes a bit field to a 32-bit value, and returns the result. + + Writes Value to the bit field specified by the StartBit and the EndBit in + Operand. All other bits in Operand are preserved. The new 32-bit value is + returned. + + If 32-bit operations are not supported, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param Value New value of the bit field. + + @return The new 32-bit value. + +**/ +UINT32 +EFIAPI +BitFieldWrite32 ( + IN UINT32 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 Value + ); + +/** + Reads a bit field from a 32-bit value, performs a bitwise OR, and returns the + result. + + Performs a bitwise inclusive OR between the bit field specified by StartBit + and EndBit in Operand and the value specified by OrData. All other bits in + Operand are preserved. The new 32-bit value is returned. + + If 32-bit operations are not supported, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param OrData The value to OR with the read value from the value + + @return The new 32-bit value. + +**/ +UINT32 +EFIAPI +BitFieldOr32 ( + IN UINT32 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 OrData + ); + +/** + Reads a bit field from a 32-bit value, performs a bitwise AND, and returns + the result. + + Performs a bitwise AND between the bit field specified by StartBit and EndBit + in Operand and the value specified by AndData. All other bits in Operand are + preserved. The new 32-bit value is returned. + + If 32-bit operations are not supported, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param AndData The value to AND with the read value from the value + + @return The new 32-bit value. + +**/ +UINT32 +EFIAPI +BitFieldAnd32 ( + IN UINT32 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData + ); + +/** + Reads a bit field from a 32-bit value, performs a bitwise AND followed by a + bitwise OR, and returns the result. + + Performs a bitwise AND between the bit field specified by StartBit and EndBit + in Operand and the value specified by AndData, followed by a bitwise + inclusive OR with value specified by OrData. All other bits in Operand are + preserved. The new 32-bit value is returned. + + If 32-bit operations are not supported, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param AndData The value to AND with the read value from the value. + @param OrData The value to OR with the result of the AND operation. + + @return The new 32-bit value. + +**/ +UINT32 +EFIAPI +BitFieldAndThenOr32 ( + IN UINT32 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData, + IN UINT32 OrData + ); + +/** + Returns a bit field from a 64-bit value. + + Returns the bitfield specified by the StartBit and the EndBit from Operand. + + If 64-bit operations are not supported, then ASSERT(). + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + + @return The bit field read. + +**/ +UINT64 +EFIAPI +BitFieldRead64 ( + IN UINT64 Operand, + IN UINTN StartBit, + IN UINTN EndBit + ); + +/** + Writes a bit field to a 64-bit value, and returns the result. + + Writes Value to the bit field specified by the StartBit and the EndBit in + Operand. All other bits in Operand are preserved. The new 64-bit value is + returned. + + If 64-bit operations are not supported, then ASSERT(). + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + @param Value New value of the bit field. + + @return The new 64-bit value. + +**/ +UINT64 +EFIAPI +BitFieldWrite64 ( + IN UINT64 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT64 Value + ); + +/** + Reads a bit field from a 64-bit value, performs a bitwise OR, and returns the + result. + + Performs a bitwise inclusive OR between the bit field specified by StartBit + and EndBit in Operand and the value specified by OrData. All other bits in + Operand are preserved. The new 64-bit value is returned. + + If 64-bit operations are not supported, then ASSERT(). + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + @param OrData The value to OR with the read value from the value + + @return The new 64-bit value. + +**/ +UINT64 +EFIAPI +BitFieldOr64 ( + IN UINT64 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT64 OrData + ); + +/** + Reads a bit field from a 64-bit value, performs a bitwise AND, and returns + the result. + + Performs a bitwise AND between the bit field specified by StartBit and EndBit + in Operand and the value specified by AndData. All other bits in Operand are + preserved. The new 64-bit value is returned. + + If 64-bit operations are not supported, then ASSERT(). + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + @param AndData The value to AND with the read value from the value + + @return The new 64-bit value. + +**/ +UINT64 +EFIAPI +BitFieldAnd64 ( + IN UINT64 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT64 AndData + ); + +/** + Reads a bit field from a 64-bit value, performs a bitwise AND followed by a + bitwise OR, and returns the result. + + Performs a bitwise AND between the bit field specified by StartBit and EndBit + in Operand and the value specified by AndData, followed by a bitwise + inclusive OR with value specified by OrData. All other bits in Operand are + preserved. The new 64-bit value is returned. + + If 64-bit operations are not supported, then ASSERT(). + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Operand Operand on which to perform the bitfield operation. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + @param AndData The value to AND with the read value from the value. + @param OrData The value to OR with the result of the AND operation. + + @return The new 64-bit value. + +**/ +UINT64 +EFIAPI +BitFieldAndThenOr64 ( + IN UINT64 Operand, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT64 AndData, + IN UINT64 OrData + ); + +// +// Base Library Synchronization Functions +// + +/** + Retrieves the architecture specific spin lock alignment requirements for + optimal spin lock performance. + + This function retrieves the spin lock alignment requirements for optimal + performance on a given CPU architecture. The spin lock alignment must be a + power of two and is returned by this function. If there are no alignment + requirements, then 1 must be returned. The spin lock synchronization + functions must function correctly if the spin lock size and alignment values + returned by this function are not used at all. These values are hints to the + consumers of the spin lock synchronization functions to obtain optimal spin + lock performance. + + @return The architecture specific spin lock alignment. + +**/ +UINTN +EFIAPI +GetSpinLockProperties ( + VOID + ); + +/** + Initializes a spin lock to the released state and returns the spin lock. + + This function initializes the spin lock specified by SpinLock to the released + state, and returns SpinLock. Optimal performance can be achieved by calling + GetSpinLockProperties() to determine the size and alignment requirements for + SpinLock. + + If SpinLock is NULL, then ASSERT(). + + @param SpinLock A pointer to the spin lock to initialize to the released + state. + + @return SpinLock + +**/ +SPIN_LOCK * +EFIAPI +InitializeSpinLock ( + IN SPIN_LOCK *SpinLock + ); + +/** + Waits until a spin lock can be placed in the acquired state. + + This function checks the state of the spin lock specified by SpinLock. If + SpinLock is in the released state, then this function places SpinLock in the + acquired state and returns SpinLock. Otherwise, this function waits + indefinitely for the spin lock to be released, and then places it in the + acquired state and returns SpinLock. All state transitions of SpinLock must + be performed using MP safe mechanisms. + + If SpinLock is NULL, then ASSERT(). + If SpinLock was not initialized with InitializeSpinLock(), then ASSERT(). + If PcdSpinLockTimeout is not zero, and SpinLock is can not be acquired in + PcdSpinLockTimeout microseconds, then ASSERT(). + + @param SpinLock A pointer to the spin lock to place in the acquired state. + + @return SpinLock + +**/ +SPIN_LOCK * +EFIAPI +AcquireSpinLock ( + IN SPIN_LOCK *SpinLock + ); + +/** + Attempts to place a spin lock in the acquired state. + + This function checks the state of the spin lock specified by SpinLock. If + SpinLock is in the released state, then this function places SpinLock in the + acquired state and returns TRUE. Otherwise, FALSE is returned. All state + transitions of SpinLock must be performed using MP safe mechanisms. + + If SpinLock is NULL, then ASSERT(). + If SpinLock was not initialized with InitializeSpinLock(), then ASSERT(). + + @param SpinLock A pointer to the spin lock to place in the acquired state. + + @retval TRUE SpinLock was placed in the acquired state. + @retval FALSE SpinLock could not be acquired. + +**/ +BOOLEAN +EFIAPI +AcquireSpinLockOrFail ( + IN SPIN_LOCK *SpinLock + ); + +/** + Releases a spin lock. + + This function places the spin lock specified by SpinLock in the release state + and returns SpinLock. + + If SpinLock is NULL, then ASSERT(). + If SpinLock was not initialized with InitializeSpinLock(), then ASSERT(). + + @param SpinLock A pointer to the spin lock to release. + + @return SpinLock + +**/ +SPIN_LOCK * +EFIAPI +ReleaseSpinLock ( + IN SPIN_LOCK *SpinLock + ); + +/** + Performs an atomic increment of an 32-bit unsigned integer. + + Performs an atomic increment of the 32-bit unsigned integer specified by + Value and returns the incremented value. The increment operation must be + performed using MP safe mechanisms. The state of the return value is not + guaranteed to be MP safe. + + If Value is NULL, then ASSERT(). + + @param Value A pointer to the 32-bit value to increment. + + @return The incremented value. + +**/ +UINT32 +EFIAPI +InterlockedIncrement ( + IN UINT32 *Value + ); + +/** + Performs an atomic decrement of an 32-bit unsigned integer. + + Performs an atomic decrement of the 32-bit unsigned integer specified by + Value and returns the decremented value. The decrement operation must be + performed using MP safe mechanisms. The state of the return value is not + guaranteed to be MP safe. + + If Value is NULL, then ASSERT(). + + @param Value A pointer to the 32-bit value to decrement. + + @return The decremented value. + +**/ +UINT32 +EFIAPI +InterlockedDecrement ( + IN UINT32 *Value + ); + +/** + Performs an atomic compare exchange operation on a 32-bit unsigned integer. + + Performs an atomic compare exchange operation on the 32-bit unsigned integer + specified by Value. If Value is equal to CompareValue, then Value is set to + ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue, + then Value is returned. The compare exchange operation must be performed using + MP safe mechanisms. + + If Value is NULL, then ASSERT(). + + @param Value A pointer to the 32-bit value for the compare exchange + operation. + @param CompareValue 32-bit value used in compare operation. + @param ExchangeValue 32-bit value used in exchange operation. + + @return The original *Value before exchange. + +**/ +UINT32 +EFIAPI +InterlockedCompareExchange32 ( + IN OUT VOLATILE UINT32 *Value, + IN UINT32 CompareValue, + IN UINT32 ExchangeValue + ); + +/** + Performs an atomic compare exchange operation on a 64-bit unsigned integer. + + Performs an atomic compare exchange operation on the 64-bit unsigned integer specified + by Value. If Value is equal to CompareValue, then Value is set to ExchangeValue and + CompareValue is returned. If Value is not equal to CompareValue, then Value is returned. + The compare exchange operation must be performed using MP safe mechanisms. + + If Value is NULL, then ASSERT(). + + @param Value A pointer to the 64-bit value for the compare exchange + operation. + @param CompareValue 64-bit value used in compare operation. + @param ExchangeValue 64-bit value used in exchange operation. + + @return The original *Value before exchange. + +**/ +UINT64 +EFIAPI +InterlockedCompareExchange64 ( + IN OUT VOLATILE UINT64 *Value, + IN UINT64 CompareValue, + IN UINT64 ExchangeValue + ); + +/** + Performs an atomic compare exchange operation on a pointer value. + + Performs an atomic compare exchange operation on the pointer value specified + by Value. If Value is equal to CompareValue, then Value is set to + ExchangeValue and CompareValue is returned. If Value is not equal to + CompareValue, then Value is returned. The compare exchange operation must be + performed using MP safe mechanisms. + + If Value is NULL, then ASSERT(). + + @param Value A pointer to the pointer value for the compare exchange + operation. + @param CompareValue Pointer value used in compare operation. + @param ExchangeValue Pointer value used in exchange operation. + +**/ +VOID * +EFIAPI +InterlockedCompareExchangePointer ( + IN OUT VOLATILE VOID **Value, + IN VOID *CompareValue, + IN VOID *ExchangeValue + ); + +// +// Base Library CPU Functions +// +typedef +VOID +(EFIAPI *SWITCH_STACK_ENTRY_POINT) ( + IN VOID *Context1, OPTIONAL + IN VOID *Context2 OPTIONAL + ); + +/** + Used to serialize load and store operations. + + All loads and stores that proceed calls to this function are guaranteed to be + globally visible when this function returns. + +**/ +VOID +EFIAPI +MemoryFence ( + VOID + ); + +/** + Saves the current CPU context that can be restored with a call to LongJump() + and returns 0. + + Saves the current CPU context in the buffer specified by JumpBuffer and + returns 0. The initial call to SetJump() must always return 0. Subsequent + calls to LongJump() cause a non-zero value to be returned by SetJump(). + + If JumpBuffer is NULL, then ASSERT(). + For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT(). + + @param JumpBuffer A pointer to CPU context buffer. + + @retval 0 Indicates a return from SetJump(). + +**/ +UINTN +EFIAPI +SetJump ( + OUT BASE_LIBRARY_JUMP_BUFFER *JumpBuffer + ); + +/** + Restores the CPU context that was saved with SetJump(). + + Restores the CPU context from the buffer specified by JumpBuffer. This + function never returns to the caller. Instead is resumes execution based on + the state of JumpBuffer. + + If JumpBuffer is NULL, then ASSERT(). + For IPF CPUs, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT(). + If Value is 0, then ASSERT(). + + @param JumpBuffer A pointer to CPU context buffer. + @param Value The value to return when the SetJump() context is + restored and must be non-zero. + +**/ +VOID +EFIAPI +LongJump ( + IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, + IN UINTN Value + ); + +/** + Enables CPU interrupts. + + Enables CPU interrupts. + +**/ +VOID +EFIAPI +EnableInterrupts ( + VOID + ); + +/** + Disables CPU interrupts. + + Disables CPU interrupts. + +**/ +VOID +EFIAPI +DisableInterrupts ( + VOID + ); + +/** + Disables CPU interrupts and returns the interrupt state prior to the disable + operation. + + Disables CPU interrupts and returns the interrupt state prior to the disable + operation. + + @retval TRUE CPU interrupts were enabled on entry to this call. + @retval FALSE CPU interrupts were disabled on entry to this call. + +**/ +BOOLEAN +EFIAPI +SaveAndDisableInterrupts ( + VOID + ); + +/** + Enables CPU interrupts for the smallest window required to capture any + pending interrupts. + + Enables CPU interrupts for the smallest window required to capture any + pending interrupts. + +**/ +VOID +EFIAPI +EnableDisableInterrupts ( + VOID + ); + +/** + Retrieves the current CPU interrupt state. + + Retrieves the current CPU interrupt state. Returns TRUE is interrupts are + currently enabled. Otherwise returns FALSE. + + @retval TRUE CPU interrupts are enabled. + @retval FALSE CPU interrupts are disabled. + +**/ +BOOLEAN +EFIAPI +GlueGetInterruptState ( + VOID + ); + +/** + Set the current CPU interrupt state. + + Sets the current CPU interrupt state to the state specified by + InterruptState. If InterruptState is TRUE, then interrupts are enabled. If + InterruptState is FALSE, then interrupts are disabled. InterruptState is + returned. + + @param InterruptState TRUE if interrupts should enabled. FALSE if + interrupts should be disabled. + + @return InterruptState + +**/ +BOOLEAN +EFIAPI +SetInterruptState ( + IN BOOLEAN InterruptState + ); + +/** + Places the CPU in a sleep state until an interrupt is received. + + Places the CPU in a sleep state until an interrupt is received. If interrupts + are disabled prior to calling this function, then the CPU will be placed in a + sleep state indefinitely. + +**/ +VOID +EFIAPI +CpuSleep ( + VOID + ); + +/** + Requests CPU to pause for a short period of time. + + Requests CPU to pause for a short period of time. Typically used in MP + systems to prevent memory starvation while waiting for a spin lock. + +**/ +VOID +EFIAPI +CpuPause ( + VOID + ); + +/** + Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU. + + Flushes all the Translation Lookaside Buffers(TLB) entries in a CPU. + +**/ +VOID +EFIAPI +CpuFlushTlb ( + VOID + ); + +/** + Transfers control to a function starting with a new stack. + + Transfers control to the function specified by EntryPoint using the new stack + specified by NewStack and passing in the parameters specified by Context1 and + Context2. Context1 and Context2 are optional and may be NULL. The function + EntryPoint must never return. + + If EntryPoint is NULL, then ASSERT(). + If NewStack is NULL, then ASSERT(). + + @param EntryPoint A pointer to function to call with the new stack. + @param Context1 A pointer to the context to pass into the EntryPoint + function. + @param Context2 A pointer to the context to pass into the EntryPoint + function. + @param NewStack A pointer to the new stack to use for the EntryPoint + function. + +**/ +VOID +EFIAPI +SwitchStack ( + IN SWITCH_STACK_ENTRY_POINT EntryPoint, + IN VOID *Context1, OPTIONAL + IN VOID *Context2, OPTIONAL + IN VOID *NewStack + ); + +/** + Generates a breakpoint on the CPU. + + Generates a breakpoint on the CPU. The breakpoint must be implemented such + that code can resume normal execution after the breakpoint. + +**/ +VOID +EFIAPI +CpuBreakpoint ( + VOID + ); + +/** + Executes an infinite loop. + + Forces the CPU to execute an infinite loop. A debugger may be used to skip + past the loop and the code that follows the loop must execute properly. This + implies that the infinite loop must not cause the code that follow it to be + optimized away. + +**/ +VOID +EFIAPI +CpuDeadLoop ( + VOID + ); + +// +// IA32 and X64 Specific Functions +// +// +// Byte packed structure for 16-bit Real Mode EFLAGS +// +typedef union { + struct { + UINT32 CF:1; // Carry Flag + UINT32 Reserved_0:1; // Reserved + UINT32 PF:1; // Parity Flag + UINT32 Reserved_1:1; // Reserved + UINT32 AF:1; // Auxiliary Carry Flag + UINT32 Reserved_2:1; // Reserved + UINT32 ZF:1; // Zero Flag + UINT32 SF:1; // Sign Flag + UINT32 TF:1; // Trap Flag + UINT32 IF:1; // Interrupt Enable Flag + UINT32 DF:1; // Direction Flag + UINT32 OF:1; // Overflow Flag + UINT32 IOPL:2; // I/O Privilege Level + UINT32 NT:1; // Nested Task + UINT32 Reserved_3:1; // Reserved + } Bits; + UINT16 Uint16; +} IA32_FLAGS16; + +// +// Byte packed structure for EFLAGS/RFLAGS +// 32-bits on IA-32 +// 64-bits on X64. The upper 32-bits on X64 are reserved +// +typedef union { + struct { + UINT32 CF:1; // Carry Flag + UINT32 Reserved_0:1; // Reserved + UINT32 PF:1; // Parity Flag + UINT32 Reserved_1:1; // Reserved + UINT32 AF:1; // Auxiliary Carry Flag + UINT32 Reserved_2:1; // Reserved + UINT32 ZF:1; // Zero Flag + UINT32 SF:1; // Sign Flag + UINT32 TF:1; // Trap Flag + UINT32 IF:1; // Interrupt Enable Flag + UINT32 DF:1; // Direction Flag + UINT32 OF:1; // Overflow Flag + UINT32 IOPL:2; // I/O Privilege Level + UINT32 NT:1; // Nested Task + UINT32 Reserved_3:1; // Reserved + UINT32 RF:1; // Resume Flag + UINT32 VM:1; // Virtual 8086 Mode + UINT32 AC:1; // Alignment Check + UINT32 VIF:1; // Virtual Interrupt Flag + UINT32 VIP:1; // Virtual Interrupt Pending + UINT32 ID:1; // ID Flag + UINT32 Reserved_4:10; // Reserved + } Bits; + UINTN UintN; +} IA32_EFLAGS32; + +// +// Byte packed structure for Control Register 0 (CR0) +// 32-bits on IA-32 +// 64-bits on X64. The upper 32-bits on X64 are reserved +// +typedef union { + struct { + UINT32 PE:1; // Protection Enable + UINT32 MP:1; // Monitor Coprocessor + UINT32 EM:1; // Emulation + UINT32 TS:1; // Task Switched + UINT32 ET:1; // Extension Type + UINT32 NE:1; // Numeric Error + UINT32 Reserved_0:10; // Reserved + UINT32 WP:1; // Write Protect + UINT32 Reserved_1:1; // Reserved + UINT32 AM:1; // Alignment Mask + UINT32 Reserved_2:10; // Reserved + UINT32 NW:1; // Mot Write-through + UINT32 CD:1; // Cache Disable + UINT32 PG:1; // Paging + } Bits; + UINTN UintN; +} IA32_CR0; + +// +// Byte packed structure for Control Register 4 (CR4) +// 32-bits on IA-32 +// 64-bits on X64. The upper 32-bits on X64 are reserved +// +typedef union { + struct { + UINT32 VME:1; // Virtual-8086 Mode Extensions + UINT32 PVI:1; // Protected-Mode Virtual Interrupts + UINT32 TSD:1; // Time Stamp Disable + UINT32 DE:1; // Debugging Extensions + UINT32 PSE:1; // Page Size Extensions + UINT32 PAE:1; // Physical Address Extension + UINT32 MCE:1; // Machine Check Enable + UINT32 PGE:1; // Page Global Enable + UINT32 PCE:1; // Performance Monitoring Counter + // Enable + UINT32 OSFXSR:1; // Operating System Support for + // FXSAVE and FXRSTOR instructions + UINT32 OSXMMEXCPT:1; // Operating System Support for + // Unmasked SIMD Floating Point + // Exceptions + UINT32 Reserved_0:2; // Reserved + UINT32 VMXE:1; // VMX Enable + UINT32 Reserved_1:18; // Reseved + } Bits; + UINTN UintN; +} IA32_CR4; + +// +// Byte packed structure for an IDTR, GDTR, LDTR descriptor +/// @bug How to make this structure byte-packed in a compiler independent way? +// +#pragma pack (1) +typedef struct { + UINT16 Limit; + UINTN Base; +} IA32_DESCRIPTOR; +#pragma pack () + +#define IA32_IDT_GATE_TYPE_TASK 0x85 +#define IA32_IDT_GATE_TYPE_INTERRUPT_16 0x86 +#define IA32_IDT_GATE_TYPE_TRAP_16 0x87 +#define IA32_IDT_GATE_TYPE_INTERRUPT_32 0x8E +#define IA32_IDT_GATE_TYPE_TRAP_32 0x8F + +// +// Byte packed structure for an Interrupt Gate Descriptor +// +typedef union { + struct { + UINT32 OffsetLow:16; // Offset bits 15..0 + UINT32 Selector:16; // Selector + UINT32 Reserved_0:8; // Reserved + UINT32 GateType:8; // Gate Type. See #defines above + UINT32 OffsetHigh:16; // Offset bits 31..16 + } Bits; + UINT64 Uint64; +} IA32_IDT_GATE_DESCRIPTOR; + +// +// Byte packed structure for an FP/SSE/SSE2 context +// +typedef struct { + UINT8 Buffer[512]; +} IA32_FX_BUFFER; + +// +// Structures for the 16-bit real mode thunks +// +typedef struct { + UINT32 Reserved1; + UINT32 Reserved2; + UINT32 Reserved3; + UINT32 Reserved4; + UINT8 BL; + UINT8 BH; + UINT16 Reserved5; + UINT8 DL; + UINT8 DH; + UINT16 Reserved6; + UINT8 CL; + UINT8 CH; + UINT16 Reserved7; + UINT8 AL; + UINT8 AH; + UINT16 Reserved8; +} IA32_BYTE_REGS; + +typedef struct { + UINT16 DI; + UINT16 Reserved1; + UINT16 SI; + UINT16 Reserved2; + UINT16 BP; + UINT16 Reserved3; + UINT16 SP; + UINT16 Reserved4; + UINT16 BX; + UINT16 Reserved5; + UINT16 DX; + UINT16 Reserved6; + UINT16 CX; + UINT16 Reserved7; + UINT16 AX; + UINT16 Reserved8; +} IA32_WORD_REGS; + +typedef struct { + UINT32 EDI; + UINT32 ESI; + UINT32 EBP; + UINT32 ESP; + UINT32 EBX; + UINT32 EDX; + UINT32 ECX; + UINT32 EAX; + UINT16 DS; + UINT16 ES; + UINT16 FS; + UINT16 GS; + IA32_EFLAGS32 EFLAGS; + UINT32 Eip; + UINT16 CS; + UINT16 SS; +} IA32_DWORD_REGS; + +typedef union { + IA32_DWORD_REGS E; + IA32_WORD_REGS X; + IA32_BYTE_REGS H; +} IA32_REGISTER_SET; + +// +// Byte packed structure for an 16-bit real mode thunks +// +typedef struct { + IA32_REGISTER_SET *RealModeState; + VOID *RealModeBuffer; + UINT32 RealModeBufferSize; + UINT32 ThunkAttributes; +} THUNK_CONTEXT; + +#define THUNK_ATTRIBUTE_BIG_REAL_MODE 0x00000001 +#define THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 0x00000002 +#define THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL 0x00000004 + +/** + Retrieves CPUID information. + + Executes the CPUID instruction with EAX set to the value specified by Index. + This function always returns Index. + If Eax is not NULL, then the value of EAX after CPUID is returned in Eax. + If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx. + If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx. + If Edx is not NULL, then the value of EDX after CPUID is returned in Edx. + This function is only available on IA-32 and X64. + + @param Index The 32-bit value to load into EAX prior to invoking the CPUID + instruction. + @param Eax Pointer to the 32-bit EAX value returned by the CPUID + instruction. This is an optional parameter that may be NULL. + @param Ebx Pointer to the 32-bit EBX value returned by the CPUID + instruction. This is an optional parameter that may be NULL. + @param Ecx Pointer to the 32-bit ECX value returned by the CPUID + instruction. This is an optional parameter that may be NULL. + @param Edx Pointer to the 32-bit EDX value returned by the CPUID + instruction. This is an optional parameter that may be NULL. + + @return Index + +**/ +UINT32 +EFIAPI +AsmCpuid ( + IN UINT32 Index, + OUT UINT32 *Eax, OPTIONAL + OUT UINT32 *Ebx, OPTIONAL + OUT UINT32 *Ecx, OPTIONAL + OUT UINT32 *Edx OPTIONAL + ); + +/** + Retrieves CPUID information using an extended leaf identifier. + + Executes the CPUID instruction with EAX set to the value specified by Index + and ECX set to the value specified by SubIndex. This function always returns + Index. This function is only available on IA-32 and x64. + + If Eax is not NULL, then the value of EAX after CPUID is returned in Eax. + If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx. + If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx. + If Edx is not NULL, then the value of EDX after CPUID is returned in Edx. + + @param Index The 32-bit value to load into EAX prior to invoking the + CPUID instruction. + @param SubIndex The 32-bit value to load into ECX prior to invoking the + CPUID instruction. + @param Eax Pointer to the 32-bit EAX value returned by the CPUID + instruction. This is an optional parameter that may be + NULL. + @param Ebx Pointer to the 32-bit EBX value returned by the CPUID + instruction. This is an optional parameter that may be + NULL. + @param Ecx Pointer to the 32-bit ECX value returned by the CPUID + instruction. This is an optional parameter that may be + NULL. + @param Edx Pointer to the 32-bit EDX value returned by the CPUID + instruction. This is an optional parameter that may be + NULL. + + @return Index + +**/ +UINT32 +EFIAPI +AsmCpuidEx ( + IN UINT32 Index, + IN UINT32 SubIndex, + OUT UINT32 *Eax, OPTIONAL + OUT UINT32 *Ebx, OPTIONAL + OUT UINT32 *Ecx, OPTIONAL + OUT UINT32 *Edx OPTIONAL + ); + +/** + Returns the lower 32-bits of a Machine Specific Register(MSR). + + Reads and returns the lower 32-bits of the MSR specified by Index. + No parameter checking is performed on Index, and some Index values may cause + CPU exceptions. The caller must either guarantee that Index is valid, or the + caller must set up exception handlers to catch the exceptions. This function + is only available on IA-32 and X64. + + @param Index The 32-bit MSR index to read. + + @return The lower 32 bits of the MSR identified by Index. + +**/ +UINT32 +EFIAPI +AsmReadMsr32 ( + IN UINT32 Index + ); + +/** + Zero-extend a 32-bit value and writes it to a Machine Specific Register(MSR). + + Writes the 32-bit value specified by Value to the MSR specified by Index. The + upper 32-bits of the MSR write are set to zero. The 32-bit value written to + the MSR is returned. No parameter checking is performed on Index or Value, + and some of these may cause CPU exceptions. The caller must either guarantee + that Index and Value are valid, or the caller must establish proper exception + handlers. This function is only available on IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param Value The 32-bit value to write to the MSR. + + @return Value + +**/ +UINT32 +EFIAPI +AsmWriteMsr32 ( + IN UINT32 Index, + IN UINT32 Value + ); + +/** + Reads a 64-bit MSR, performs a bitwise inclusive OR on the lower 32-bits, and + writes the result back to the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR + between the lower 32-bits of the read result and the value specified by + OrData, and writes the result to the 64-bit MSR specified by Index. The lower + 32-bits of the value written to the MSR is returned. No parameter checking is + performed on Index or OrData, and some of these may cause CPU exceptions. The + caller must either guarantee that Index and OrData are valid, or the caller + must establish proper exception handlers. This function is only available on + IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param OrData The value to OR with the read value from the MSR. + + @return The lower 32-bit value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrOr32 ( + IN UINT32 Index, + IN UINT32 OrData + ); + +/** + Reads a 64-bit MSR, performs a bitwise AND on the lower 32-bits, and writes + the result back to the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND between the + lower 32-bits of the read result and the value specified by AndData, and + writes the result to the 64-bit MSR specified by Index. The lower 32-bits of + the value written to the MSR is returned. No parameter checking is performed + on Index or AndData, and some of these may cause CPU exceptions. The caller + must either guarantee that Index and AndData are valid, or the caller must + establish proper exception handlers. This function is only available on IA-32 + and X64. + + @param Index The 32-bit MSR index to write. + @param AndData The value to AND with the read value from the MSR. + + @return The lower 32-bit value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrAnd32 ( + IN UINT32 Index, + IN UINT32 AndData + ); + +/** + Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise inclusive OR + on the lower 32-bits, and writes the result back to the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND between the + lower 32-bits of the read result and the value specified by AndData + preserving the upper 32-bits, performs a bitwise inclusive OR between the + result of the AND operation and the value specified by OrData, and writes the + result to the 64-bit MSR specified by Address. The lower 32-bits of the value + written to the MSR is returned. No parameter checking is performed on Index, + AndData, or OrData, and some of these may cause CPU exceptions. The caller + must either guarantee that Index, AndData, and OrData are valid, or the + caller must establish proper exception handlers. This function is only + available on IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param AndData The value to AND with the read value from the MSR. + @param OrData The value to OR with the result of the AND operation. + + @return The lower 32-bit value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrAndThenOr32 ( + IN UINT32 Index, + IN UINT32 AndData, + IN UINT32 OrData + ); + +/** + Reads a bit field of an MSR. + + Reads the bit field in the lower 32-bits of a 64-bit MSR. The bit field is + specified by the StartBit and the EndBit. The value of the bit field is + returned. The caller must either guarantee that Index is valid, or the caller + must set up exception handlers to catch the exceptions. This function is only + available on IA-32 and X64. + + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to read. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + + @return The bit field read from the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldRead32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit + ); + +/** + Writes a bit field to an MSR. + + Writes Value to a bit field in the lower 32-bits of a 64-bit MSR. The bit + field is specified by the StartBit and the EndBit. All other bits in the + destination MSR are preserved. The lower 32-bits of the MSR written is + returned. Extra left bits in Value are stripped. The caller must either + guarantee that Index and the data written is valid, or the caller must set up + exception handlers to catch the exceptions. This function is only available + on IA-32 and X64. + + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to write. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param Value New value of the bit field. + + @return The lower 32-bit of the value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldWrite32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 Value + ); + +/** + Reads a bit field in a 64-bit MSR, performs a bitwise OR, and writes the + result back to the bit field in the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR + between the read result and the value specified by OrData, and writes the + result to the 64-bit MSR specified by Index. The lower 32-bits of the value + written to the MSR are returned. Extra left bits in OrData are stripped. The + caller must either guarantee that Index and the data written is valid, or + the caller must set up exception handlers to catch the exceptions. This + function is only available on IA-32 and X64. + + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to write. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param OrData The value to OR with the read value from the MSR. + + @return The lower 32-bit of the value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldOr32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 OrData + ); + +/** + Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the + result back to the bit field in the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND between the + read result and the value specified by AndData, and writes the result to the + 64-bit MSR specified by Index. The lower 32-bits of the value written to the + MSR are returned. Extra left bits in AndData are stripped. The caller must + either guarantee that Index and the data written is valid, or the caller must + set up exception handlers to catch the exceptions. This function is only + available on IA-32 and X64. + + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to write. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param AndData The value to AND with the read value from the MSR. + + @return The lower 32-bit of the value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldAnd32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData + ); + +/** + Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a + bitwise inclusive OR, and writes the result back to the bit field in the + 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by a + bitwise inclusive OR between the read result and the value specified by + AndData, and writes the result to the 64-bit MSR specified by Index. The + lower 32-bits of the value written to the MSR are returned. Extra left bits + in both AndData and OrData are stripped. The caller must either guarantee + that Index and the data written is valid, or the caller must set up exception + handlers to catch the exceptions. This function is only available on IA-32 + and X64. + + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to write. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..31. + @param AndData The value to AND with the read value from the MSR. + @param OrData The value to OR with the result of the AND operation. + + @return The lower 32-bit of the value written to the MSR. + +**/ +UINT32 +EFIAPI +AsmMsrBitFieldAndThenOr32 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData, + IN UINT32 OrData + ); + +/** + Returns a 64-bit Machine Specific Register(MSR). + + Reads and returns the 64-bit MSR specified by Index. No parameter checking is + performed on Index, and some Index values may cause CPU exceptions. The + caller must either guarantee that Index is valid, or the caller must set up + exception handlers to catch the exceptions. This function is only available + on IA-32 and X64. + + @param Index The 32-bit MSR index to read. + + @return The value of the MSR identified by Index. + +**/ +UINT64 +EFIAPI +AsmReadMsr64 ( + IN UINT32 Index + ); + +/** + Writes a 64-bit value to a Machine Specific Register(MSR), and returns the + value. + + Writes the 64-bit value specified by Value to the MSR specified by Index. The + 64-bit value written to the MSR is returned. No parameter checking is + performed on Index or Value, and some of these may cause CPU exceptions. The + caller must either guarantee that Index and Value are valid, or the caller + must establish proper exception handlers. This function is only available on + IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param Value The 64-bit value to write to the MSR. + + @return Value + +**/ +UINT64 +EFIAPI +AsmWriteMsr64 ( + IN UINT32 Index, + IN UINT64 Value + ); + +/** + Reads a 64-bit MSR, performs a bitwise inclusive OR, and writes the result + back to the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR + between the read result and the value specified by OrData, and writes the + result to the 64-bit MSR specified by Index. The value written to the MSR is + returned. No parameter checking is performed on Index or OrData, and some of + these may cause CPU exceptions. The caller must either guarantee that Index + and OrData are valid, or the caller must establish proper exception handlers. + This function is only available on IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param OrData The value to OR with the read value from the MSR. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrOr64 ( + IN UINT32 Index, + IN UINT64 OrData + ); + +/** + Reads a 64-bit MSR, performs a bitwise AND, and writes the result back to the + 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND between the + read result and the value specified by OrData, and writes the result to the + 64-bit MSR specified by Index. The value written to the MSR is returned. No + parameter checking is performed on Index or OrData, and some of these may + cause CPU exceptions. The caller must either guarantee that Index and OrData + are valid, or the caller must establish proper exception handlers. This + function is only available on IA-32 and X64. + + @param Index The 32-bit MSR index to write. + @param AndData The value to AND with the read value from the MSR. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrAnd64 ( + IN UINT32 Index, + IN UINT64 AndData + ); + +/** + Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise inclusive + OR, and writes the result back to the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND between read + result and the value specified by AndData, performs a bitwise inclusive OR + between the result of the AND operation and the value specified by OrData, + and writes the result to the 64-bit MSR specified by Index. The value written + to the MSR is returned. No parameter checking is performed on Index, AndData, + or OrData, and some of these may cause CPU exceptions. The caller must either + guarantee that Index, AndData, and OrData are valid, or the caller must + establish proper exception handlers. This function is only available on IA-32 + and X64. + + @param Index The 32-bit MSR index to write. + @param AndData The value to AND with the read value from the MSR. + @param OrData The value to OR with the result of the AND operation. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrAndThenOr64 ( + IN UINT32 Index, + IN UINT64 AndData, + IN UINT64 OrData + ); + +/** + Reads a bit field of an MSR. + + Reads the bit field in the 64-bit MSR. The bit field is specified by the + StartBit and the EndBit. The value of the bit field is returned. The caller + must either guarantee that Index is valid, or the caller must set up + exception handlers to catch the exceptions. This function is only available + on IA-32 and X64. + + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to read. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + + @return The value read from the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrBitFieldRead64 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit + ); + +/** + Writes a bit field to an MSR. + + Writes Value to a bit field in a 64-bit MSR. The bit field is specified by + the StartBit and the EndBit. All other bits in the destination MSR are + preserved. The MSR written is returned. Extra left bits in Value are + stripped. The caller must either guarantee that Index and the data written is + valid, or the caller must set up exception handlers to catch the exceptions. + This function is only available on IA-32 and X64. + + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to write. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + @param Value New value of the bit field. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrBitFieldWrite64 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT64 Value + ); + +/** + Reads a bit field in a 64-bit MSR, performs a bitwise inclusive OR, and + writes the result back to the bit field in the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise inclusive OR + between the read result and the value specified by OrData, and writes the + result to the 64-bit MSR specified by Index. The value written to the MSR is + returned. Extra left bits in OrData are stripped. The caller must either + guarantee that Index and the data written is valid, or the caller must set up + exception handlers to catch the exceptions. This function is only available + on IA-32 and X64. + + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to write. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + @param OrData The value to OR with the read value from the bit field. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrBitFieldOr64 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT64 OrData + ); + +/** + Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the + result back to the bit field in the 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND between the + read result and the value specified by AndData, and writes the result to the + 64-bit MSR specified by Index. The value written to the MSR is returned. + Extra left bits in AndData are stripped. The caller must either guarantee + that Index and the data written is valid, or the caller must set up exception + handlers to catch the exceptions. This function is only available on IA-32 + and X64. + + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to write. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + @param AndData The value to AND with the read value from the bit field. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrBitFieldAnd64 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT64 AndData + ); + +/** + Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a + bitwise inclusive OR, and writes the result back to the bit field in the + 64-bit MSR. + + Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by + a bitwise inclusive OR between the read result and the value specified by + AndData, and writes the result to the 64-bit MSR specified by Index. The + value written to the MSR is returned. Extra left bits in both AndData and + OrData are stripped. The caller must either guarantee that Index and the data + written is valid, or the caller must set up exception handlers to catch the + exceptions. This function is only available on IA-32 and X64. + + If StartBit is greater than 63, then ASSERT(). + If EndBit is greater than 63, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Index The 32-bit MSR index to write. + @param StartBit The ordinal of the least significant bit in the bit field. + Range 0..63. + @param EndBit The ordinal of the most significant bit in the bit field. + Range 0..63. + @param AndData The value to AND with the read value from the bit field. + @param OrData The value to OR with the result of the AND operation. + + @return The value written back to the MSR. + +**/ +UINT64 +EFIAPI +AsmMsrBitFieldAndThenOr64 ( + IN UINT32 Index, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT64 AndData, + IN UINT64 OrData + ); + +/** + Reads the current value of the EFLAGS register. + + Reads and returns the current value of the EFLAGS register. This function is + only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a + 64-bit value on X64. + + @return EFLAGS on IA-32 or RFLAGS on X64. + +**/ +UINTN +EFIAPI +AsmReadEflags ( + VOID + ); + +/** + Reads the current value of the Control Register 0 (CR0). + + Reads and returns the current value of CR0. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of the Control Register 0 (CR0). + +**/ +UINTN +EFIAPI +AsmReadCr0 ( + VOID + ); + +/** + Reads the current value of the Control Register 2 (CR2). + + Reads and returns the current value of CR2. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of the Control Register 2 (CR2). + +**/ +UINTN +EFIAPI +AsmReadCr2 ( + VOID + ); + +/** + Reads the current value of the Control Register 3 (CR3). + + Reads and returns the current value of CR3. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of the Control Register 3 (CR3). + +**/ +UINTN +EFIAPI +AsmReadCr3 ( + VOID + ); + +/** + Reads the current value of the Control Register 4 (CR4). + + Reads and returns the current value of CR4. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of the Control Register 4 (CR4). + +**/ +UINTN +EFIAPI +AsmReadCr4 ( + VOID + ); + +/** + Writes a value to Control Register 0 (CR0). + + Writes and returns a new value to CR0. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Cr0 The value to write to CR0. + + @return The value written to CR0. + +**/ +UINTN +EFIAPI +AsmWriteCr0 ( + UINTN Cr0 + ); + +/** + Writes a value to Control Register 2 (CR2). + + Writes and returns a new value to CR2. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Cr2 The value to write to CR2. + + @return The value written to CR2. + +**/ +UINTN +EFIAPI +AsmWriteCr2 ( + UINTN Cr2 + ); + +/** + Writes a value to Control Register 3 (CR3). + + Writes and returns a new value to CR3. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Cr3 The value to write to CR3. + + @return The value written to CR3. + +**/ +UINTN +EFIAPI +AsmWriteCr3 ( + UINTN Cr3 + ); + +/** + Writes a value to Control Register 4 (CR4). + + Writes and returns a new value to CR4. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Cr4 The value to write to CR4. + + @return The value written to CR4. + +**/ +UINTN +EFIAPI +AsmWriteCr4 ( + UINTN Cr4 + ); + +/** + Reads the current value of Debug Register 0 (DR0). + + Reads and returns the current value of DR0. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of Debug Register 0 (DR0). + +**/ +UINTN +EFIAPI +AsmReadDr0 ( + VOID + ); + +/** + Reads the current value of Debug Register 1 (DR1). + + Reads and returns the current value of DR1. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of Debug Register 1 (DR1). + +**/ +UINTN +EFIAPI +AsmReadDr1 ( + VOID + ); + +/** + Reads the current value of Debug Register 2 (DR2). + + Reads and returns the current value of DR2. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of Debug Register 2 (DR2). + +**/ +UINTN +EFIAPI +AsmReadDr2 ( + VOID + ); + +/** + Reads the current value of Debug Register 3 (DR3). + + Reads and returns the current value of DR3. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of Debug Register 3 (DR3). + +**/ +UINTN +EFIAPI +AsmReadDr3 ( + VOID + ); + +/** + Reads the current value of Debug Register 4 (DR4). + + Reads and returns the current value of DR4. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of Debug Register 4 (DR4). + +**/ +UINTN +EFIAPI +AsmReadDr4 ( + VOID + ); + +/** + Reads the current value of Debug Register 5 (DR5). + + Reads and returns the current value of DR5. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of Debug Register 5 (DR5). + +**/ +UINTN +EFIAPI +AsmReadDr5 ( + VOID + ); + +/** + Reads the current value of Debug Register 6 (DR6). + + Reads and returns the current value of DR6. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of Debug Register 6 (DR6). + +**/ +UINTN +EFIAPI +AsmReadDr6 ( + VOID + ); + +/** + Reads the current value of Debug Register 7 (DR7). + + Reads and returns the current value of DR7. This function is only available + on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on + X64. + + @return The value of Debug Register 7 (DR7). + +**/ +UINTN +EFIAPI +AsmReadDr7 ( + VOID + ); + +/** + Writes a value to Debug Register 0 (DR0). + + Writes and returns a new value to DR0. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Dr0 The value to write to Dr0. + + @return The value written to Debug Register 0 (DR0). + +**/ +UINTN +EFIAPI +AsmWriteDr0 ( + UINTN Dr0 + ); + +/** + Writes a value to Debug Register 1 (DR1). + + Writes and returns a new value to DR1. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Dr1 The value to write to Dr1. + + @return The value written to Debug Register 1 (DR1). + +**/ +UINTN +EFIAPI +AsmWriteDr1 ( + UINTN Dr1 + ); + +/** + Writes a value to Debug Register 2 (DR2). + + Writes and returns a new value to DR2. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Dr2 The value to write to Dr2. + + @return The value written to Debug Register 2 (DR2). + +**/ +UINTN +EFIAPI +AsmWriteDr2 ( + UINTN Dr2 + ); + +/** + Writes a value to Debug Register 3 (DR3). + + Writes and returns a new value to DR3. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Dr3 The value to write to Dr3. + + @return The value written to Debug Register 3 (DR3). + +**/ +UINTN +EFIAPI +AsmWriteDr3 ( + UINTN Dr3 + ); + +/** + Writes a value to Debug Register 4 (DR4). + + Writes and returns a new value to DR4. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Dr4 The value to write to Dr4. + + @return The value written to Debug Register 4 (DR4). + +**/ +UINTN +EFIAPI +AsmWriteDr4 ( + UINTN Dr4 + ); + +/** + Writes a value to Debug Register 5 (DR5). + + Writes and returns a new value to DR5. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Dr5 The value to write to Dr5. + + @return The value written to Debug Register 5 (DR5). + +**/ +UINTN +EFIAPI +AsmWriteDr5 ( + UINTN Dr5 + ); + +/** + Writes a value to Debug Register 6 (DR6). + + Writes and returns a new value to DR6. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Dr6 The value to write to Dr6. + + @return The value written to Debug Register 6 (DR6). + +**/ +UINTN +EFIAPI +AsmWriteDr6 ( + UINTN Dr6 + ); + +/** + Writes a value to Debug Register 7 (DR7). + + Writes and returns a new value to DR7. This function is only available on + IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. + + @param Dr7 The value to write to Dr7. + + @return The value written to Debug Register 7 (DR7). + +**/ +UINTN +EFIAPI +AsmWriteDr7 ( + UINTN Dr7 + ); + +/** + Reads the current value of Code Segment Register (CS). + + Reads and returns the current value of CS. This function is only available on + IA-32 and X64. + + @return The current value of CS. + +**/ +UINT16 +EFIAPI +AsmReadCs ( + VOID + ); + +/** + Reads the current value of Data Segment Register (DS). + + Reads and returns the current value of DS. This function is only available on + IA-32 and X64. + + @return The current value of DS. + +**/ +UINT16 +EFIAPI +AsmReadDs ( + VOID + ); + +/** + Reads the current value of Extra Segment Register (ES). + + Reads and returns the current value of ES. This function is only available on + IA-32 and X64. + + @return The current value of ES. + +**/ +UINT16 +EFIAPI +AsmReadEs ( + VOID + ); + +/** + Reads the current value of FS Data Segment Register (FS). + + Reads and returns the current value of FS. This function is only available on + IA-32 and X64. + + @return The current value of FS. + +**/ +UINT16 +EFIAPI +AsmReadFs ( + VOID + ); + +/** + Reads the current value of GS Data Segment Register (GS). + + Reads and returns the current value of GS. This function is only available on + IA-32 and X64. + + @return The current value of GS. + +**/ +UINT16 +EFIAPI +AsmReadGs ( + VOID + ); + +/** + Reads the current value of Stack Segment Register (SS). + + Reads and returns the current value of SS. This function is only available on + IA-32 and X64. + + @return The current value of SS. + +**/ +UINT16 +EFIAPI +AsmReadSs ( + VOID + ); + +/** + Reads the current value of Task Register (TR). + + Reads and returns the current value of TR. This function is only available on + IA-32 and X64. + + @return The current value of TR. + +**/ +UINT16 +EFIAPI +AsmReadTr ( + VOID + ); + +/** + Reads the current Global Descriptor Table Register(GDTR) descriptor. + + Reads and returns the current GDTR descriptor and returns it in Gdtr. This + function is only available on IA-32 and X64. + + If Gdtr is NULL, then ASSERT(). + + @param Gdtr Pointer to a GDTR descriptor. + +**/ +VOID +EFIAPI +AsmReadGdtr ( + OUT IA32_DESCRIPTOR *Gdtr + ); + +/** + Writes the current Global Descriptor Table Register (GDTR) descriptor. + + Writes and the current GDTR descriptor specified by Gdtr. This function is + only available on IA-32 and X64. + + If Gdtr is NULL, then ASSERT(). + + @param Gdtr Pointer to a GDTR descriptor. + +**/ +VOID +EFIAPI +AsmWriteGdtr ( + IN CONST IA32_DESCRIPTOR *Gdtr + ); + +/** + Reads the current Interrupt Descriptor Table Register(GDTR) descriptor. + + Reads and returns the current IDTR descriptor and returns it in Idtr. This + function is only available on IA-32 and X64. + + If Idtr is NULL, then ASSERT(). + + @param Idtr Pointer to a IDTR descriptor. + +**/ +VOID +EFIAPI +AsmReadIdtr ( + OUT IA32_DESCRIPTOR *Idtr + ); + +/** + Writes the current Interrupt Descriptor Table Register(GDTR) descriptor. + + Writes the current IDTR descriptor and returns it in Idtr. This function is + only available on IA-32 and X64. + + If Idtr is NULL, then ASSERT(). + + @param Idtr Pointer to a IDTR descriptor. + +**/ +VOID +EFIAPI +AsmWriteIdtr ( + IN CONST IA32_DESCRIPTOR *Idtr + ); + +/** + Reads the current Local Descriptor Table Register(LDTR) selector. + + Reads and returns the current 16-bit LDTR descriptor value. This function is + only available on IA-32 and X64. + + @return The current selector of LDT. + +**/ +UINT16 +EFIAPI +AsmReadLdtr ( + VOID + ); + +/** + Writes the current Local Descriptor Table Register (GDTR) selector. + + Writes and the current LDTR descriptor specified by Ldtr. This function is + only available on IA-32 and X64. + + @param Ldtr 16-bit LDTR selector value. + +**/ +VOID +EFIAPI +AsmWriteLdtr ( + IN UINT16 Ldtr + ); + +/** + Save the current floating point/SSE/SSE2 context to a buffer. + + Saves the current floating point/SSE/SSE2 state to the buffer specified by + Buffer. Buffer must be aligned on a 16-byte boundary. This function is only + available on IA-32 and X64. + + If Buffer is NULL, then ASSERT(). + If Buffer is not aligned on a 16-byte boundary, then ASSERT(). + + @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. + +**/ +VOID +EFIAPI +AsmFxSave ( + OUT IA32_FX_BUFFER *Buffer + ); + +/** + Restores the current floating point/SSE/SSE2 context from a buffer. + + Restores the current floating point/SSE/SSE2 state from the buffer specified + by Buffer. Buffer must be aligned on a 16-byte boundary. This function is + only available on IA-32 and X64. + + If Buffer is NULL, then ASSERT(). + If Buffer is not aligned on a 16-byte boundary, then ASSERT(). + If Buffer was not saved with AsmFxSave(), then ASSERT(). + + @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. + +**/ +VOID +EFIAPI +AsmFxRestore ( + IN CONST IA32_FX_BUFFER *Buffer + ); + +/** + Reads the current value of 64-bit MMX Register #0 (MM0). + + Reads and returns the current value of MM0. This function is only available + on IA-32 and X64. + + @return The current value of MM0. + +**/ +UINT64 +EFIAPI +AsmReadMm0 ( + VOID + ); + +/** + Reads the current value of 64-bit MMX Register #1 (MM1). + + Reads and returns the current value of MM1. This function is only available + on IA-32 and X64. + + @return The current value of MM1. + +**/ +UINT64 +EFIAPI +AsmReadMm1 ( + VOID + ); + +/** + Reads the current value of 64-bit MMX Register #2 (MM2). + + Reads and returns the current value of MM2. This function is only available + on IA-32 and X64. + + @return The current value of MM2. + +**/ +UINT64 +EFIAPI +AsmReadMm2 ( + VOID + ); + +/** + Reads the current value of 64-bit MMX Register #3 (MM3). + + Reads and returns the current value of MM3. This function is only available + on IA-32 and X64. + + @return The current value of MM3. + +**/ +UINT64 +EFIAPI +AsmReadMm3 ( + VOID + ); + +/** + Reads the current value of 64-bit MMX Register #4 (MM4). + + Reads and returns the current value of MM4. This function is only available + on IA-32 and X64. + + @return The current value of MM4. + +**/ +UINT64 +EFIAPI +AsmReadMm4 ( + VOID + ); + +/** + Reads the current value of 64-bit MMX Register #5 (MM5). + + Reads and returns the current value of MM5. This function is only available + on IA-32 and X64. + + @return The current value of MM5. + +**/ +UINT64 +EFIAPI +AsmReadMm5 ( + VOID + ); + +/** + Reads the current value of 64-bit MMX Register #6 (MM6). + + Reads and returns the current value of MM6. This function is only available + on IA-32 and X64. + + @return The current value of MM6. + +**/ +UINT64 +EFIAPI +AsmReadMm6 ( + VOID + ); + +/** + Reads the current value of 64-bit MMX Register #7 (MM7). + + Reads and returns the current value of MM7. This function is only available + on IA-32 and X64. + + @return The current value of MM7. + +**/ +UINT64 +EFIAPI +AsmReadMm7 ( + VOID + ); + +/** + Writes the current value of 64-bit MMX Register #0 (MM0). + + Writes the current value of MM0. This function is only available on IA32 and + X64. + + @param Value The 64-bit value to write to MM0. + +**/ +VOID +EFIAPI +AsmWriteMm0 ( + IN UINT64 Value + ); + +/** + Writes the current value of 64-bit MMX Register #1 (MM1). + + Writes the current value of MM1. This function is only available on IA32 and + X64. + + @param Value The 64-bit value to write to MM1. + +**/ +VOID +EFIAPI +AsmWriteMm1 ( + IN UINT64 Value + ); + +/** + Writes the current value of 64-bit MMX Register #2 (MM2). + + Writes the current value of MM2. This function is only available on IA32 and + X64. + + @param Value The 64-bit value to write to MM2. + +**/ +VOID +EFIAPI +AsmWriteMm2 ( + IN UINT64 Value + ); + +/** + Writes the current value of 64-bit MMX Register #3 (MM3). + + Writes the current value of MM3. This function is only available on IA32 and + X64. + + @param Value The 64-bit value to write to MM3. + +**/ +VOID +EFIAPI +AsmWriteMm3 ( + IN UINT64 Value + ); + +/** + Writes the current value of 64-bit MMX Register #4 (MM4). + + Writes the current value of MM4. This function is only available on IA32 and + X64. + + @param Value The 64-bit value to write to MM4. + +**/ +VOID +EFIAPI +AsmWriteMm4 ( + IN UINT64 Value + ); + +/** + Writes the current value of 64-bit MMX Register #5 (MM5). + + Writes the current value of MM5. This function is only available on IA32 and + X64. + + @param Value The 64-bit value to write to MM5. + +**/ +VOID +EFIAPI +AsmWriteMm5 ( + IN UINT64 Value + ); + +/** + Writes the current value of 64-bit MMX Register #6 (MM6). + + Writes the current value of MM6. This function is only available on IA32 and + X64. + + @param Value The 64-bit value to write to MM6. + +**/ +VOID +EFIAPI +AsmWriteMm6 ( + IN UINT64 Value + ); + +/** + Writes the current value of 64-bit MMX Register #7 (MM7). + + Writes the current value of MM7. This function is only available on IA32 and + X64. + + @param Value The 64-bit value to write to MM7. + +**/ +VOID +EFIAPI +AsmWriteMm7 ( + IN UINT64 Value + ); + +/** + Reads the current value of Time Stamp Counter (TSC). + + Reads and returns the current value of TSC. This function is only available + on IA-32 and X64. + + @return The current value of TSC + +**/ +UINT64 +EFIAPI +AsmReadTsc ( + VOID + ); + +/** + Reads the current value of a Performance Counter (PMC). + + Reads and returns the current value of performance counter specified by + Index. This function is only available on IA-32 and X64. + + @param Index The 32-bit Performance Counter index to read. + + @return The value of the PMC specified by Index. + +**/ +UINT64 +EFIAPI +AsmReadPmc ( + IN UINT32 Index + ); + +/** + Sets up a monitor buffer that is used by AsmMwait(). + + Executes a MONITOR instruction with the register state specified by Eax, Ecx + and Edx. Returns Eax. This function is only available on IA-32 and X64. + + @param Eax The value to load into EAX or RAX before executing the MONITOR + instruction. + @param Ecx The value to load into ECX or RCX before executing the MONITOR + instruction. + @param Edx The value to load into EDX or RDX before executing the MONITOR + instruction. + + @return Eax + +**/ +UINTN +EFIAPI +AsmMonitor ( + IN UINTN Eax, + IN UINTN Ecx, + IN UINTN Edx + ); + +/** + Executes an MWAIT instruction. + + Executes an MWAIT instruction with the register state specified by Eax and + Ecx. Returns Eax. This function is only available on IA-32 and X64. + + @param Eax The value to load into EAX or RAX before executing the MONITOR + instruction. + @param Ecx The value to load into ECX or RCX before executing the MONITOR + instruction. + + @return Eax + +**/ +UINTN +EFIAPI +AsmMwait ( + IN UINTN Eax, + IN UINTN Ecx + ); + +/** + Executes a WBINVD instruction. + + Executes a WBINVD instruction. This function is only available on IA-32 and + X64. + +**/ +VOID +EFIAPI +AsmWbinvd ( + VOID + ); + +/** + Executes a INVD instruction. + + Executes a INVD instruction. This function is only available on IA-32 and + X64. + +**/ +VOID +EFIAPI +AsmInvd ( + VOID + ); + +/** + Flushes a cache line from all the instruction and data caches within the + coherency domain of the CPU. + + Flushed the cache line specified by LinearAddress, and returns LinearAddress. + This function is only available on IA-32 and X64. + + @param LinearAddress The address of the cache line to flush. If the CPU is + in a physical addressing mode, then LinearAddress is a + physical address. If the CPU is in a virtual + addressing mode, then LinearAddress is a virtual + address. + + @return LinearAddress +**/ +VOID * +EFIAPI +AsmFlushCacheLine ( + IN VOID *LinearAddress + ); + +/** + Enables the 32-bit paging mode on the CPU. + + Enables the 32-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables + must be properly initialized prior to calling this service. This function + assumes the current execution mode is 32-bit protected mode. This function is + only available on IA-32. After the 32-bit paging mode is enabled, control is + transferred to the function specified by EntryPoint using the new stack + specified by NewStack and passing in the parameters specified by Context1 and + Context2. Context1 and Context2 are optional and may be NULL. The function + EntryPoint must never return. + + If the current execution mode is not 32-bit protected mode, then ASSERT(). + If EntryPoint is NULL, then ASSERT(). + If NewStack is NULL, then ASSERT(). + + There are a number of constraints that must be followed before calling this + function: + 1) Interrupts must be disabled. + 2) The caller must be in 32-bit protected mode with flat descriptors. This + means all descriptors must have a base of 0 and a limit of 4GB. + 3) CR0 and CR4 must be compatible with 32-bit protected mode with flat + descriptors. + 4) CR3 must point to valid page tables that will be used once the transition + is complete, and those page tables must guarantee that the pages for this + function and the stack are identity mapped. + + @param EntryPoint A pointer to function to call with the new stack after + paging is enabled. + @param Context1 A pointer to the context to pass into the EntryPoint + function as the first parameter after paging is enabled. + @param Context2 A pointer to the context to pass into the EntryPoint + function as the second parameter after paging is enabled. + @param NewStack A pointer to the new stack to use for the EntryPoint + function after paging is enabled. + +**/ +VOID +EFIAPI +AsmEnablePaging32 ( + IN SWITCH_STACK_ENTRY_POINT EntryPoint, + IN VOID *Context1, OPTIONAL + IN VOID *Context2, OPTIONAL + IN VOID *NewStack + ); + +/** + Disables the 32-bit paging mode on the CPU. + + Disables the 32-bit paging mode on the CPU and returns to 32-bit protected + mode. This function assumes the current execution mode is 32-paged protected + mode. This function is only available on IA-32. After the 32-bit paging mode + is disabled, control is transferred to the function specified by EntryPoint + using the new stack specified by NewStack and passing in the parameters + specified by Context1 and Context2. Context1 and Context2 are optional and + may be NULL. The function EntryPoint must never return. + + If the current execution mode is not 32-bit paged mode, then ASSERT(). + If EntryPoint is NULL, then ASSERT(). + If NewStack is NULL, then ASSERT(). + + There are a number of constraints that must be followed before calling this + function: + 1) Interrupts must be disabled. + 2) The caller must be in 32-bit paged mode. + 3) CR0, CR3, and CR4 must be compatible with 32-bit paged mode. + 4) CR3 must point to valid page tables that guarantee that the pages for + this function and the stack are identity mapped. + + @param EntryPoint A pointer to function to call with the new stack after + paging is disabled. + @param Context1 A pointer to the context to pass into the EntryPoint + function as the first parameter after paging is disabled. + @param Context2 A pointer to the context to pass into the EntryPoint + function as the second parameter after paging is + disabled. + @param NewStack A pointer to the new stack to use for the EntryPoint + function after paging is disabled. + +**/ +VOID +EFIAPI +AsmDisablePaging32 ( + IN SWITCH_STACK_ENTRY_POINT EntryPoint, + IN VOID *Context1, OPTIONAL + IN VOID *Context2, OPTIONAL + IN VOID *NewStack + ); + +/** + Enables the 64-bit paging mode on the CPU. + + Enables the 64-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables + must be properly initialized prior to calling this service. This function + assumes the current execution mode is 32-bit protected mode with flat + descriptors. This function is only available on IA-32. After the 64-bit + paging mode is enabled, control is transferred to the function specified by + EntryPoint using the new stack specified by NewStack and passing in the + parameters specified by Context1 and Context2. Context1 and Context2 are + optional and may be 0. The function EntryPoint must never return. + + If the current execution mode is not 32-bit protected mode with flat + descriptors, then ASSERT(). + If EntryPoint is 0, then ASSERT(). + If NewStack is 0, then ASSERT(). + + @param Cs The 16-bit selector to load in the CS before EntryPoint + is called. The descriptor in the GDT that this selector + references must be setup for long mode. + @param EntryPoint The 64-bit virtual address of the function to call with + the new stack after paging is enabled. + @param Context1 The 64-bit virtual address of the context to pass into + the EntryPoint function as the first parameter after + paging is enabled. + @param Context2 The 64-bit virtual address of the context to pass into + the EntryPoint function as the second parameter after + paging is enabled. + @param NewStack The 64-bit virtual address of the new stack to use for + the EntryPoint function after paging is enabled. + +**/ +VOID +EFIAPI +AsmEnablePaging64 ( + IN UINT16 CodeSelector, + IN UINT64 EntryPoint, + IN UINT64 Context1, OPTIONAL + IN UINT64 Context2, OPTIONAL + IN UINT64 NewStack + ); + +/** + Disables the 64-bit paging mode on the CPU. + + Disables the 64-bit paging mode on the CPU and returns to 32-bit protected + mode. This function assumes the current execution mode is 64-paging mode. + This function is only available on X64. After the 64-bit paging mode is + disabled, control is transferred to the function specified by EntryPoint + using the new stack specified by NewStack and passing in the parameters + specified by Context1 and Context2. Context1 and Context2 are optional and + may be 0. The function EntryPoint must never return. + + If the current execution mode is not 64-bit paged mode, then ASSERT(). + If EntryPoint is 0, then ASSERT(). + If NewStack is 0, then ASSERT(). + + @param Cs The 16-bit selector to load in the CS before EntryPoint + is called. The descriptor in the GDT that this selector + references must be setup for 32-bit protected mode. + @param EntryPoint The 64-bit virtual address of the function to call with + the new stack after paging is disabled. + @param Context1 The 64-bit virtual address of the context to pass into + the EntryPoint function as the first parameter after + paging is disabled. + @param Context2 The 64-bit virtual address of the context to pass into + the EntryPoint function as the second parameter after + paging is disabled. + @param NewStack The 64-bit virtual address of the new stack to use for + the EntryPoint function after paging is disabled. + +**/ +VOID +EFIAPI +AsmDisablePaging64 ( + IN UINT16 CodeSelector, + IN UINT32 EntryPoint, + IN UINT32 Context1, OPTIONAL + IN UINT32 Context2, OPTIONAL + IN UINT32 NewStack + ); + +// +// 16-bit thunking services +// + +/** + Retrieves the properties for 16-bit thunk functions. + + Computes the size of the buffer and stack below 1MB required to use the + AsmPrepareThunk16(), AsmThunk16() and AsmPrepareAndThunk16() functions. This + buffer size is returned in RealModeBufferSize, and the stack size is returned + in ExtraStackSize. If parameters are passed to the 16-bit real mode code, + then the actual minimum stack size is ExtraStackSize plus the maximum number + of bytes that need to be passed to the 16-bit real mode code. + + If RealModeBufferSize is NULL, then ASSERT(). + If ExtraStackSize is NULL, then ASSERT(). + + @param RealModeBufferSize A pointer to the size of the buffer below 1MB + required to use the 16-bit thunk functions. + @param ExtraStackSize A pointer to the extra size of stack below 1MB + that the 16-bit thunk functions require for + temporary storage in the transition to and from + 16-bit real mode. + +**/ +VOID +EFIAPI +AsmGetThunk16Properties ( + OUT UINT32 *RealModeBufferSize, + OUT UINT32 *ExtraStackSize + ); + +/** + Prepares all structures a code required to use AsmThunk16(). + + Prepares all structures and code required to use AsmThunk16(). + + If ThunkContext is NULL, then ASSERT(). + + @param ThunkContext A pointer to the context structure that describes the + 16-bit real mode code to call. + +**/ +VOID +EFIAPI +AsmPrepareThunk16 ( + OUT THUNK_CONTEXT *ThunkContext + ); + +/** + Transfers control to a 16-bit real mode entry point and returns the results. + + Transfers control to a 16-bit real mode entry point and returns the results. + AsmPrepareThunk16() must be called with ThunkContext before this function is + used. + + If ThunkContext is NULL, then ASSERT(). + If AsmPrepareThunk16() was not previously called with ThunkContext, then ASSERT(). + + @param ThunkContext A pointer to the context structure that describes the + 16-bit real mode code to call. + +**/ +VOID +EFIAPI +AsmThunk16 ( + IN OUT THUNK_CONTEXT *ThunkContext + ); + +/** + Prepares all structures and code for a 16-bit real mode thunk, transfers + control to a 16-bit real mode entry point, and returns the results. + + Prepares all structures and code for a 16-bit real mode thunk, transfers + control to a 16-bit real mode entry point, and returns the results. If the + caller only need to perform a single 16-bit real mode thunk, then this + service should be used. If the caller intends to make more than one 16-bit + real mode thunk, then it is more efficient if AsmPrepareThunk16() is called + once and AsmThunk16() can be called for each 16-bit real mode thunk. + + If ThunkContext is NULL, then ASSERT(). + + @param ThunkContext A pointer to the context structure that describes the + 16-bit real mode code to call. + +**/ +VOID +EFIAPI +AsmPrepareAndThunk16 ( + IN OUT THUNK_CONTEXT *ThunkContext + ); + +/** + Transfers control to a function starting with a new stack. + + Transfers control to the function specified by EntryPoint using the new stack + specified by NewStack and passing in the parameters specified by Context1 and + Context2. Context1 and Context2 are optional and may be NULL. The function + EntryPoint must never return. + + If EntryPoint is NULL, then ASSERT(). + If NewStack is NULL, then ASSERT(). + + @param EntryPoint A pointer to function to call with the new stack. + @param Context1 A pointer to the context to pass into the EntryPoint + function. + @param Context2 A pointer to the context to pass into the EntryPoint + function. + @param NewStack A pointer to the new stack to use for the EntryPoint + function. + @param NewBsp A pointer to the new memory location for RSE backing + store. + +**/ +VOID +EFIAPI +AsmSwitchStackAndBackingStore ( + IN SWITCH_STACK_ENTRY_POINT EntryPoint, + IN VOID *Context1, OPTIONAL + IN VOID *Context2, OPTIONAL + IN VOID *NewStack, + IN VOID *NewBsp + ); + +#endif |