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Diffstat (limited to 'Core/CPU/x64/x64CLib.c')
| -rw-r--r-- | Core/CPU/x64/x64CLib.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/Core/CPU/x64/x64CLib.c b/Core/CPU/x64/x64CLib.c new file mode 100644 index 0000000..ad96411 --- /dev/null +++ b/Core/CPU/x64/x64CLib.c @@ -0,0 +1,328 @@ +//************************************************************************* +//************************************************************************* +//** ** +//** (C)Copyright 1985-2009, American Megatrends, Inc. ** +//** ** +//** All Rights Reserved. ** +//** ** +//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +//** ** +//** Phone: (770)-246-8600 ** +//** ** +//************************************************************************* +//************************************************************************* + +//************************************************************************* +// $Header: /Alaska/SOURCE/Core/Modules/x64Core/x64CLib.c 4 7/10/09 9:30a Felixp $ +// +// $Revision: 4 $ +// +// $Date: 7/10/09 9:30a $ +//************************************************************************* +// Revision History +// ---------------- +// $Log: /Alaska/SOURCE/Core/Modules/x64Core/x64CLib.c $ +// +// 4 7/10/09 9:30a Felixp +// Function headers are added. +// +// 3 10/09/06 10:11a Felixp +// MemCpy/MemSet replaced with assembler routines +// +// 2 8/25/06 10:52a Felixp +// memcpy, memset functions updated with the volotile qualifier to +// restrain compiler optimization. +// +// 1 8/24/06 12:57p Felixp +// +//************************************************************************* +//<AMI_FHDR_START> +// +// Name: x64CLib.c +// +// Description: +// Generic CPU library functions for the x64 architecture. +// +//<AMI_FHDR_END> +//************************************************************************* + +#include <efi.h> + +//************************************************************************* +// Math +//************************************************************************* + +//************************************************************************* +//<AMI_GHDR_START> +// +// Name: Math_64_Bit_Functions +// +// Description: +// Math functions involving 64-bit input parameters designed to be usable on +// both 32-bit and 64-bit platforms. +// +// Fields: Header Function Description +// ------------------------------------------------------------------ +// AmiLib Shr64 Shift 64-bit value right. +// AmiLib Shl64 Shift 64-bit value left. +// AmiLib Div64 Divide 64-bit value by a 31-bit value. +// AmiLib Mul64 Multiply 64-bit value by a 32-bit value. +// AmiLib GetPowerOfTwo64 Determine the highest set bit in a 64-bit value. +// +// Notes: +// Header details which header file contains the function prototype for +// the above functions. Append .h to the given name. +// +//<AMI_GHDR_END> +//************************************************************************* + +//************************************************************************* +//<AMI_GHDR_START> +// +// Name: CPU_Functions +// +// Description: +// CPU related functions defined in the AMI library. +// +// Fields: Header Function Description +// ------------------------------------------------------------------ +// None CPULib_CpuID Perform the cpuid assembly instruction. +// None CPULib_DisableInterrupt Disable interrupts. +// None CPULib_EnableInterrupt Enable interrupts. +// None CPULib_GetInterruptState Get current interrupt state (enabled or disabled). +// None CPULIB_GetPageTable Retrieve address of the page table. +// None CPULib_LoadGdt Load GDT. +// None CPULib_LoadIdt Load IDT. +// None CPULib_LockByteDec Lock preceeding byte. +// None CPULib_LockByteInc Lock following byte. +// None CPULib_Pause Pause CPU. +// None CPULib_SaveGdt Save GDT at provided location. +// None CPULib_SaveIdt Save IDT at provided location. +// None DisableCacheInCR0 Disable CPU cache using CR0. +// None EnableCacheInCR0 Enable CPU cache using CR0. +// None EnableMachineCheck Enable machine check exception bit in CR4. +// AmiLib GetCpuTimer Retrieve the CPU timer's value. +// None GetCsSegment Retrieve the code segment. +// None HltCpu Halt the CPU. +// None WaitForever Perform infinite loop. +// None WaitForSemaphore Wait for semaphore to become available. then take control. +// None WaitUntilZero32 Wait until a 32-bit memory region becomes zero. +// None WaitUntilZero8 Wait until an 8-bit meomry region becomes zero. +// None WriteMsr Write a value to a MSR. +// None ReadMsr Read value from a MSR. +// AmiLib WriteCr3 Write a value to CR3. +// AmiLib ReadCr3 Read value from CR3. +// None ReadRtdsc Retrieve the time stamp counter. +// +// Notes: +// Header details which header file contains the function prototype for +// the above functions. Append .h to the given name. +// +//<AMI_GHDR_END> +//************************************************************************* + + +//************************************************************************* +//<AMI_PHDR_START> +// +// Name: Shr64 +// +// Description: +// UINT64 Shr64(IN UINT64 Value, IN UINT8 Shift) shifts the 64-bit Value +// right the provided number of bits, Shift. +// +// Input: +// IN UINT64 Value +// The value to be shifted. +// +// IN UINT8 Shift +// The number of bits to shift right. +// +// Output: +// UINT64 Value shifted right Shift number of bits. +// +// Modified: +// +// Referrals: +// +// Notes: +// +//<AMI_PHDR_END> +//************************************************************************* +UINT64 Shr64( + IN UINT64 Value, + IN UINT8 Shift + ) +{ + return Value>>Shift; +} + +//************************************************************************* +//<AMI_PHDR_START> +// +// Name: Shl64 +// +// Description: +// UINT64 Shl64(IN UINT64 Value, IN UINT8 Shift) shifts the 64-bit Value +// left the provided number of bits, Shift. +// +// Input: +// IN UINT64 Value +// The value to be shifted left. +// +// IN UINT8 Shift +// The number of bits to shift. +// +// Output: +// UINT64 Value shifted left Shift number of bits. +// +// Modified: +// +// Referrals: +// +// Notes: +// +//<AMI_PHDR_END> +//************************************************************************* +UINT64 Shl64( + IN UINT64 Value, + IN UINT8 Shift + ) +{ + return Value<<Shift; +} + +//************************************************************************* +//<AMI_PHDR_START> +// +// Name: Div64 +// +// Description: +// UINT64 Div64(IN UINT64 Dividend, IN UINTN Divisor, +// OUT UINTN *Remainder OPTIONAL) divides a 64-bit number, Dividend, by the +// Divisor, which can be up to 31-bits. +// +// Input: +// IN UINT64 Dividend +// The 64-bit number to be divided. +// +// IN UINT Divisor +// The number to divide Dividend by; may not exceed 31-bits in size. +// +// OUT UINTN *Remainder OPTIONAL +// The remainder of the division. Provide NULL if undesired; otherwise user +// is responsible for handling the necessary memory resources. +// +// Output: +// UINT64 result of dividing Dividend by Divisor. +// +// Modified: +// +// Referrals: +// +// Notes: +// +//<AMI_PHDR_END> +//************************************************************************* +UINT64 Div64 ( + IN UINT64 Dividend, + IN UINTN Divisor, //Can only be 31 bits. + OUT UINTN *Remainder OPTIONAL + ) +{ + UINT64 Result = Dividend/Divisor; + if (Remainder) *Remainder=Dividend%Divisor; + return Result; +} + +//************************************************************************* +//<AMI_PHDR_START> +// +// Name: Mul64 +// +// Description: +// UINT64 Mul64(IN UINT64 Value64, IN UINTN Value32) multiplies a 64-bit +// number by a 32-bit number and returns the 64-bit result. +// +// Input: +// IN UINTN64 Value64 +// The 64-bit number to multiply by. +// +// IN UINTN Value32 +// The 32-bit number to multiply by. +// +// Output: +// UINT64 result of multiplying Value64 by Value32. +// +// Modified: +// +// Referrals: +// +// Notes: +// +//<AMI_PHDR_END> +//************************************************************************* +UINT64 Mul64( + IN UINT64 Value64, + IN UINTN Value32 + ) +{ + return Value64*Value32; +} + +//************************************************************************* +// Memory Operations +//************************************************************************* + +VOID MemSet(VOID* pBuffer, UINTN Count, UINT8 Value); + +//************************************************************************* +//<AMI_PHDR_START> +// +// Name: memset +// +// Description: +// VOID memset(IN VOID *pBuffer, IN UINT8 Value, IN UINTN Count) is a +// wrapper for MemSet which fills Count bytes of memory in pBuffer with +// Value. +// +// Input: +// IN VOID *pBuffer +// The starting location in memory where to begin filling. +// +// IN UINT8 Value +// The value to fill memory with starting at pBuffer. +// +// IN UINTN Count +// The number of bytes to fill with Value. +// +// Output: +// VOID. +// +// Modified: +// +// Referrals: +// MemSet +// +// Notes: +// +//<AMI_PHDR_END> +//************************************************************************* +VOID memset(VOID* pBuffer, UINTN Value, UINTN Count) +{ + MemSet(pBuffer,Count,(UINT8)Value); +} + +//************************************************************************* +//************************************************************************* +//** ** +//** (C)Copyright 1985-2009, American Megatrends, Inc. ** +//** ** +//** All Rights Reserved. ** +//** ** +//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +//** ** +//** Phone: (770)-246-8600 ** +//** ** +//************************************************************************* +//************************************************************************* |