diff options
18 files changed, 4491 insertions, 2 deletions
diff --git a/MdePkg/Library/BaseLib/Arm/CpuBreakpoint.S b/MdePkg/Library/BaseLib/Arm/CpuBreakpoint.S new file mode 100644 index 0000000000..0c3a9d5899 --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/CpuBreakpoint.S @@ -0,0 +1,36 @@ +#------------------------------------------------------------------------------ +# +# CpuBreakpoint() for ARM +# +# Copyright (c) 2006 - 2009, Intel Corporation<BR> +# Portions copyright (c) 2008-2009 Apple Inc.<BR> +# 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. +# +#------------------------------------------------------------------------------ + +.text +.align 2 +.globl ASM_PFX(CpuBreakpoint) + +#/** +# 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 +# ); +# +ASM_PFX(CpuBreakpoint): + swi 0xdbdbdb + bx lr diff --git a/MdePkg/Library/BaseLib/Arm/CpuBreakpoint.asm b/MdePkg/Library/BaseLib/Arm/CpuBreakpoint.asm new file mode 100644 index 0000000000..83485e9d78 --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/CpuBreakpoint.asm @@ -0,0 +1,38 @@ +;------------------------------------------------------------------------------ +; +; CpuBreakpoint() for ARM +; +; Copyright (c) 2006 - 2009, Intel Corporation<BR> +; Portions copyright (c) 2008-2009 Apple Inc.<BR> +; 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. +; +;------------------------------------------------------------------------------ + + EXPORT CpuBreakpoint + + AREA Cpu_Breakpoint, CODE, READONLY + +;/** +; 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 +; ); +; +CpuBreakpoint + swi 0xdbdbdb + bx lr + + END diff --git a/MdePkg/Library/BaseLib/Arm/CpuPause.asm b/MdePkg/Library/BaseLib/Arm/CpuPause.asm new file mode 100644 index 0000000000..f6d19c9d96 --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/CpuPause.asm @@ -0,0 +1,41 @@ +;------------------------------------------------------------------------------ +; +; CpuPause() for ARM +; +; Copyright (c) 2006 - 2009, Intel Corporation<BR> +; Portions copyright (c) 2008-2009 Apple Inc.<BR> +; 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. +; +;------------------------------------------------------------------------------ + + EXPORT CpuPause + AREA cpu_pause, CODE, READONLY + +;/** +; 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 +; ); +; +CpuPause + NOP + NOP + NOP + NOP + NOP + BX LR + + END diff --git a/MdePkg/Library/BaseLib/Arm/DisableInterrupts.S b/MdePkg/Library/BaseLib/Arm/DisableInterrupts.S new file mode 100644 index 0000000000..9fbc3f9510 --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/DisableInterrupts.S @@ -0,0 +1,35 @@ +#------------------------------------------------------------------------------ +# +# DisableInterrupts() for ARM +# +# Copyright (c) 2006 - 2009, Intel Corporation<BR> +# Portions copyright (c) 2008-2009 Apple Inc.<BR> +# 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. +# +#------------------------------------------------------------------------------ + +.text +.p2align 2 +.globl ASM_PFX(DisableInterrupts) + +#/** +# Disables CPU interrupts. +# +#**/ +#VOID +#EFIAPI +#DisableInterrupts ( +# VOID +# ); +# +ASM_PFX(DisableInterrupts): + mrs R0,CPSR + orr R0,R0,#0x80 @Disable IRQ interrupts + msr CPSR_c,R0 + bx LR diff --git a/MdePkg/Library/BaseLib/Arm/DisableInterrupts.asm b/MdePkg/Library/BaseLib/Arm/DisableInterrupts.asm new file mode 100644 index 0000000000..71adb1c7a5 --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/DisableInterrupts.asm @@ -0,0 +1,37 @@ +;------------------------------------------------------------------------------ +; +; DisableInterrupts() for ARM +; +; Copyright (c) 2006 - 2009, Intel Corporation<BR> +; Portions copyright (c) 2008-2009 Apple Inc.<BR> +; 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. +; +;------------------------------------------------------------------------------ + + EXPORT DisableInterrupts + + AREA Interrupt_disable, CODE, READONLY + +;/** +; Disables CPU interrupts. +; +;**/ +;VOID +;EFIAPI +;DisableInterrupts ( +; VOID +; ); +; +DisableInterrupts + MRS R0,CPSR + ORR R0,R0,#0x80 ;Disable IRQ interrupts + MSR CPSR_c,R0 + BX LR + + END diff --git a/MdePkg/Library/BaseLib/Arm/EnableInterrupts.S b/MdePkg/Library/BaseLib/Arm/EnableInterrupts.S new file mode 100644 index 0000000000..b4115e802b --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/EnableInterrupts.S @@ -0,0 +1,36 @@ +#------------------------------------------------------------------------------ +# +# EnableInterrupts() for ARM +# +# Copyright (c) 2006 - 2009, Intel Corporation<BR> +# Portions copyright (c) 2008-2009 Apple Inc.<BR> +# 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. +# +#------------------------------------------------------------------------------ + +.text +.p2align 2 +.globl ASM_PFX(EnableInterrupts) + + +#/** +# Enables CPU interrupts. +# +#**/ +#VOID +#EFIAPI +#EnableInterrupts ( +# VOID +# ); +# +ASM_PFX(EnableInterrupts): + mrs R0,CPSR + bic R0,R0,#0x80 @Enable IRQ interrupts + msr CPSR_c,R0 + bx LR diff --git a/MdePkg/Library/BaseLib/Arm/EnableInterrupts.asm b/MdePkg/Library/BaseLib/Arm/EnableInterrupts.asm new file mode 100644 index 0000000000..1a98fb57b4 --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/EnableInterrupts.asm @@ -0,0 +1,37 @@ +;------------------------------------------------------------------------------ +; +; EnableInterrupts() for ARM +; +; Copyright (c) 2006 - 2009, Intel Corporation<BR> +; Portions copyright (c) 2008-2009 Apple Inc.<BR> +; 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. +; +;------------------------------------------------------------------------------ + + EXPORT EnableInterrupts + + AREA Interrupt_enable, CODE, READONLY + +;/** +; Enables CPU interrupts. +; +;**/ +;VOID +;EFIAPI +;EnableInterrupts ( +; VOID +; ); +; +EnableInterrupts + MRS R0,CPSR + BIC R0,R0,#0x80 ;Enable IRQ interrupts + MSR CPSR_c,R0 + BX LR + + END diff --git a/MdePkg/Library/BaseLib/Arm/GccInline.c b/MdePkg/Library/BaseLib/Arm/GccInline.c new file mode 100644 index 0000000000..cb1dc8bebe --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/GccInline.c @@ -0,0 +1,61 @@ +/** @file + GCC inline implementation of BaseLib processor specific functions. + + Copyright (c) 2006 - 2007, Intel Corporation<BR> + Portions copyright (c) 2008-2009 Apple Inc.<BR> + 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. + +**/ + +#include "BaseLibInternals.h" + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "nop\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" + ); +} + +VOID +EFIAPI +InternalSwitchStackAsm ( + SWITCH_STACK_ENTRY_POINT EntryPoint, + VOID *Context, + VOID *Context2, + VOID *NewStack + ) +{ + __asm__ __volatile__ ( + "mov lr, %0\n\t" + "mov sp, %3\n\t" + "mov %r0, %1\n\t" + "mov %r1, %2\n\t" + "bx lr\n\t" + : /* no output operand */ + : "r" (EntryPoint), + "r" (Context), + "r" (Context2), + "r" (NewStack) + ); +} diff --git a/MdePkg/Library/BaseLib/Arm/GetInterruptsState.S b/MdePkg/Library/BaseLib/Arm/GetInterruptsState.S new file mode 100644 index 0000000000..4103aaaf9b --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/GetInterruptsState.S @@ -0,0 +1,43 @@ +#------------------------------------------------------------------------------ +# +# GetInterruptState() function for ARM +# +# Copyright (c) 2006 - 2009, Intel Corporation<BR> +# Portions copyright (c) 2008-2009 Apple Inc.<BR> +# 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. +# +#------------------------------------------------------------------------------ + +.text +.p2align 2 +.globl _GetInterruptState + +#/** +# 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 +#GetInterruptState ( +# VOID +# ); +# +_GetInterruptState: + mrs R0, CPSR + tst R0, #0x80 @Check if IRQ is enabled. + moveq R0, #1 + movne R0, #0 + bx LR diff --git a/MdePkg/Library/BaseLib/Arm/GetInterruptsState.asm b/MdePkg/Library/BaseLib/Arm/GetInterruptsState.asm new file mode 100644 index 0000000000..9516cfc3e1 --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/GetInterruptsState.asm @@ -0,0 +1,45 @@ +;------------------------------------------------------------------------------ +; +; GetInterruptState() function for ARM +; +; Copyright (c) 2006 - 2009, Intel Corporation<BR> +; Portions copyright (c) 2008-2009 Apple Inc.<BR> +; 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. +; +;------------------------------------------------------------------------------ + + EXPORT GetInterruptState + + AREA Interrupt_enable, CODE, READONLY + +;/** +; 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 +;GetInterruptState ( +; VOID +; ); +; +GetInterruptState + MRS R0, CPSR + TST R0, #0x80 ;Check if IRQ is enabled. + MOVEQ R0, #1 + MOVNE R0, #0 + BX LR + + END diff --git a/MdePkg/Library/BaseLib/Arm/InternalSwitchStack.c b/MdePkg/Library/BaseLib/Arm/InternalSwitchStack.c new file mode 100644 index 0000000000..7b6351122f --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/InternalSwitchStack.c @@ -0,0 +1,59 @@ +/** @file + SwitchStack() function for ARM. + + Copyright (c) 2006 - 2007, Intel Corporation<BR> + Portions copyright (c) 2008-2009 Apple Inc.<BR> + 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. + +**/ + +#include "BaseLibInternals.h" + +/** + 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. + Marker will be ignored on IA-32, x64, and EBC. + IPF CPUs expect one additional parameter of type VOID * that specifies + the new backing store pointer. + + 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 Marker VA_LIST marker for the variable argument list. + +**/ +VOID +EFIAPI +InternalSwitchStack ( + IN SWITCH_STACK_ENTRY_POINT EntryPoint, + IN VOID *Context1, OPTIONAL + IN VOID *Context2, OPTIONAL + IN VOID *NewStack, + IN VA_LIST Marker + ) + +{ + // + // Stack should be aligned with CPU_STACK_ALIGNMENT + // + ASSERT (((UINTN)NewStack & (CPU_STACK_ALIGNMENT - 1)) == 0); + + InternalSwitchStackAsm (EntryPoint, Context1, Context2, NewStack); +} diff --git a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S new file mode 100644 index 0000000000..d79ad2e84b --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S @@ -0,0 +1,70 @@ +#------------------------------------------------------------------------------ +# +# Copyright (c) 2006 - 2009, Intel Corporation<BR> +# Portions copyright (c) 2008-2009 Apple Inc.<BR> +# 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. +# +#------------------------------------------------------------------------------ +.text +.p2align 2 + +.globl ASM_PFX(SetJump) +.globl ASM_PFX(InternalLongJump) + +#/** +# 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. +# +#**/ +# +#UINTN +#EFIAPI +#SetJump ( +# IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer // R0 +# ); +# +ASM_PFX(SetJump): + mov r3, r13 + stmia r0, {r3-r12,r14} + eor r0, r0, r0 + bx lr + +#/** +# 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. +# +# @param JumpBuffer A pointer to CPU context buffer. +# @param Value The value to return when the SetJump() context is restored. +# +#**/ +#VOID +#EFIAPI +#InternalLongJump ( +# IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, // R0 +# IN UINTN Value // R1 +# ); +# +ASM_PFX(InternalLongJump): + ldmia r0, {r3-r12,r14} + mov r13, r3 + mov r0, r1 + bx lr + +ASM_FUNCTION_REMOVE_IF_UNREFERENCED() diff --git a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm new file mode 100644 index 0000000000..d277742965 --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm @@ -0,0 +1,70 @@ +;------------------------------------------------------------------------------ +; +; Copyright (c) 2006 - 2009, Intel Corporation<BR> +; Portions copyright (c) 2008-2009 Apple Inc.<BR> +; 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. +; +;------------------------------------------------------------------------------ + + EXPORT SetJump + EXPORT InternalLongJump + + AREA BaseLib, CODE, READONLY + +;/** +; 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. +; +;**/ +; +;UINTN +;EFIAPI +;SetJump ( +; IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer // R0 +; ) +; +SetJump + MOV R3, R13 + STM R0, {R3-R12,R14} + EOR R0, R0 + BX LR + +;/** +; 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. +; +; @param JumpBuffer A pointer to CPU context buffer. +; @param Value The value to return when the SetJump() context is restored. +; +;**/ +;VOID +;EFIAPI +;InternalLongJump ( +; IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, // R0 +; IN UINTN Value // R1 +; ); +; +InternalLongJump + LDM R0, {R3-R12,R14} + MOV R13, R3 + MOV R0, R1 + BX LR + + END diff --git a/MdePkg/Library/BaseLib/Arm/SwitchStack.asm b/MdePkg/Library/BaseLib/Arm/SwitchStack.asm new file mode 100644 index 0000000000..2cc7b57e04 --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/SwitchStack.asm @@ -0,0 +1,45 @@ +;------------------------------------------------------------------------------ +; +; Copyright (c) 2006 - 2009, Intel Corporation<BR> +; Portions copyright (c) 2008-2009 Apple Inc.<BR> +; 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. +; +;------------------------------------------------------------------------------ + + EXPORT InternalSwitchStackAsm + + AREA Switch_Stack, CODE, READONLY + +;/** +; This allows the caller to switch the stack and goes to the new entry point +; +; @param EntryPoint Pointer to the location to enter +; @param Context Parameter to pass in +; @param Context2 Parameter2 to pass in +; @param NewStack New Location of the stack +; +; @return Nothing. Goes to the Entry Point passing in the new parameters +; +;**/ +;VOID +;EFIAPI +;InternalSwitchStackAsm ( +; SWITCH_STACK_ENTRY_POINT EntryPoint, +; VOID *Context, +; VOID *Context2, +; VOID *NewStack +; ); +; +InternalSwitchStackAsm + MOV LR, R0 + MOV SP, R3 + MOV R0, R1 + MOV R1, R2 + BX LR + END diff --git a/MdePkg/Library/BaseLib/Arm/Unaligned.c b/MdePkg/Library/BaseLib/Arm/Unaligned.c new file mode 100644 index 0000000000..76a7c620ab --- /dev/null +++ b/MdePkg/Library/BaseLib/Arm/Unaligned.c @@ -0,0 +1,252 @@ +/** @file + Unaligned access functions of BaseLib for ARM. + + volatile was added to work around optimization issues. + + Copyright (c) 2006 - 2009, Intel Corporation<BR> + Portions Copyright (c) 2008-2009 Apple Inc.<BR> + 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. + +**/ + +#include "BaseLibInternals.h" + +/** + 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 The 16-bit value read from Buffer. + +**/ +UINT16 +EFIAPI +ReadUnaligned16 ( + IN CONST UINT16 *Buffer + ) +{ + volatile UINT8 LowerByte; + volatile UINT8 HigherByte; + + ASSERT (Buffer != NULL); + + LowerByte = ((UINT8*)Buffer)[0]; + HigherByte = ((UINT8*)Buffer)[1]; + + return (UINT16)(LowerByte | (HigherByte << 8)); +} + +/** + 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 The 16-bit value to write to Buffer. + +**/ +UINT16 +EFIAPI +WriteUnaligned16 ( + OUT UINT16 *Buffer, + IN UINT16 Value + ) +{ + ASSERT (Buffer != NULL); + + ((volatile UINT8*)Buffer)[0] = (UINT8)Value; + ((volatile UINT8*)Buffer)[1] = (UINT8)(Value >> 8); + + return 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 24-bit value read from Buffer. + +**/ +UINT32 +EFIAPI +ReadUnaligned24 ( + IN CONST UINT32 *Buffer + ) +{ + ASSERT (Buffer != NULL); + + return (UINT32)( + ReadUnaligned16 ((UINT16*)Buffer) | + (((UINT8*)Buffer)[2] << 16) + ); +} + +/** + 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 24-bit value to write to Buffer. + +**/ +UINT32 +EFIAPI +WriteUnaligned24 ( + OUT UINT32 *Buffer, + IN UINT32 Value + ) +{ + ASSERT (Buffer != NULL); + + WriteUnaligned16 ((UINT16*)Buffer, (UINT16)Value); + *(UINT8*)((UINT16*)Buffer + 1) = (UINT8)(Value >> 16); + return 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 The 32-bit value read from Buffer. + +**/ +UINT32 +EFIAPI +ReadUnaligned32 ( + IN CONST UINT32 *Buffer + ) +{ + UINT16 LowerBytes; + UINT16 HigherBytes; + + ASSERT (Buffer != NULL); + + LowerBytes = ReadUnaligned16 ((UINT16*) Buffer); + HigherBytes = ReadUnaligned16 ((UINT16*) Buffer + 1); + + return (UINT32) (LowerBytes | (HigherBytes << 16)); +} + +/** + 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 The 32-bit value to write to Buffer. + +**/ +UINT32 +EFIAPI +WriteUnaligned32 ( + OUT UINT32 *Buffer, + IN UINT32 Value + ) +{ + ASSERT (Buffer != NULL); + + WriteUnaligned16 ((UINT16*)Buffer, (UINT16)Value); + WriteUnaligned16 ((UINT16*)Buffer + 1, (UINT16)(Value >> 16)); + return 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 The 64-bit value read from Buffer. + +**/ +UINT64 +EFIAPI +ReadUnaligned64 ( + IN CONST UINT64 *Buffer + ) +{ + UINT32 LowerBytes; + UINT32 HigherBytes; + + ASSERT (Buffer != NULL); + + LowerBytes = ReadUnaligned32 ((UINT32*) Buffer); + HigherBytes = ReadUnaligned32 ((UINT32*) Buffer + 1); + + return (UINT64) (LowerBytes | LShiftU64 (HigherBytes, 32)); +} + +/** + 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 The 64-bit value to write to Buffer. + +**/ +UINT64 +EFIAPI +WriteUnaligned64 ( + OUT UINT64 *Buffer, + IN UINT64 Value + ) +{ + ASSERT (Buffer != NULL); + + WriteUnaligned32 ((UINT32*)Buffer, (UINT32)Value); + WriteUnaligned32 ((UINT32*)Buffer + 1, (UINT32)RShiftU64 (Value, 32)); + return Value; +} diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf index 1cadb67adf..b240364822 100644 --- a/MdePkg/Library/BaseLib/BaseLib.inf +++ b/MdePkg/Library/BaseLib/BaseLib.inf @@ -1,7 +1,8 @@ #/** @file
# Base Library implementation.
#
-# Copyright (c) 2007 - 2009, Intel Corporation.
+# Copyright (c) 2007 - 2009, Intel Corporation.<BR>
+# Portions Copyright (c) 2008-2009 Apple Inc.<BR> #
# All rights reserved. This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
@@ -22,7 +23,7 @@ LIBRARY_CLASS = BaseLib
#
-# VALID_ARCHITECTURES = IA32 X64 IPF EBC
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC ARM
#
[Sources.common]
@@ -583,6 +584,25 @@ Unaligned.c
Math64.c
+[Sources.ARM] + Arm/InternalSwitchStack.c + Arm/Unaligned.c + Math64.c + + Arm/SwitchStack.asm | RVCT + Arm/SetJumpLongJump.asm | RVCT + Arm/DisableInterrupts.asm | RVCT + Arm/EnableInterrupts.asm | RVCT + Arm/GetInterruptsState.asm | RVCT + Arm/CpuPause.asm | RVCT + Arm/CpuBreakpoint.asm + + Arm/GccInline.c | GCC + Arm/EnableInterrupts.S | GCC + Arm/DisableInterrupts.S | GCC + Arm/SetJumpLongJump.S | GCC + Arm/CpuBreakpoint.S | GCC + [Packages]
MdePkg/MdePkg.dec
diff --git a/MdePkg/Library/BaseLib/Ia32/GccInline.c b/MdePkg/Library/BaseLib/Ia32/GccInline.c new file mode 100644 index 0000000000..6118676b4d --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/GccInline.c @@ -0,0 +1,1758 @@ +/** @file + GCC inline implementation of BaseLib processor specific functions. + + Copyright (c) 2006 - 2007, Intel Corporation<BR> + Portions copyright (c) 2008-2009 Apple Inc.<BR> + 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. + +**/ + + +#include "BaseLibInternals.h" + + + +/** + 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 + ) +{ + // This is a little bit of overkill and it is more about the compiler that it is + // actually processor syncronization. This is like the _ReadWriteBarrier + // Microsft specific intrinsic + __asm__ __volatile__ ("":::"memory"); +} + + +/** + Enables CPU interrupts. + + Enables CPU interrupts. + +**/ +VOID +EFIAPI +EnableInterrupts ( + VOID + ) +{ + __asm__ __volatile__ ("sti"::: "memory"); +} + + +/** + Disables CPU interrupts. + + Disables CPU interrupts. + +**/ +VOID +EFIAPI +DisableInterrupts ( + VOID + ) +{ + __asm__ __volatile__ ("cli"::: "memory"); +} + + + + +/** + 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 + ) +{ + __asm__ __volatile__ ("pause"); +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ("int $3"); +} + + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "rdmsr" + : "=A" (Data) // %0 + : "c" (Index) // %1 + ); + + return Data; +} + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "wrmsr" + : + : "c" (Index), + "A" (Value) + ); + + return Value; +} + + + +/** + 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 + ) +{ + UINTN Eflags; + + __asm__ __volatile__ ( + "pushfl \n\t" + "popl %0 " + : "=r" (Eflags) + ); + + return Eflags; +} + + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%cr0,%0" + : "=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%cr2, %0" + : "=r" (Data) + ); + + return Data; +} + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%cr3, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%cr4, %0" + : "=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%cr0" + : + : "r" (Cr0) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%cr2" + : + : "r" (Cr2) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%cr3" + : + : "r" (Cr3) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%cr4" + : + : "r" (Cr4) + ); + return 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%dr0, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%dr1, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%dr2, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%dr3, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%dr4, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%dr5, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%dr6, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "movl %%dr7, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%dr0" + : + : "r" (Dr0) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%dr1" + : + : "r" (Dr1) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%dr2" + : + : "r" (Dr2) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%dr3" + : + : "r" (Dr3) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%dr4" + : + : "r" (Dr4) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%dr5" + : + : "r" (Dr5) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%dr6" + : + : "r" (Dr6) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "movl %0, %%dr7" + : + : "r" (Dr7) + ); + return 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%cs, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%ds, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%es, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%fs, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%gs, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%ds, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "str %0" + : "=a" (Data) + ); + + return Data; +} + + +/** + 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. + + @param Gdtr Pointer to a GDTR descriptor. + +**/ +VOID +EFIAPI +InternalX86ReadGdtr ( + OUT IA32_DESCRIPTOR *Gdtr + ) +{ + __asm__ __volatile__ ( + "sgdt %0" + : "=m" (*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. + + @param Gdtr Pointer to a GDTR descriptor. + +**/ +VOID +EFIAPI +InternalX86WriteGdtr ( + IN CONST IA32_DESCRIPTOR *Gdtr + ) +{ + __asm__ __volatile__ ( + "lgdt %0" + : + : "m" (*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. + + @param Idtr Pointer to a IDTR descriptor. + +**/ +VOID +EFIAPI +InternalX86ReadIdtr ( + OUT IA32_DESCRIPTOR *Ldtr + ) +{ + __asm__ __volatile__ ( + "sldt %0" + : "=m" (*Ldtr) + ); +} + + +/** + 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. + + @param Idtr Pointer to a IDTR descriptor. + +**/ +VOID +EFIAPI +InternalX86WriteIdtr ( + IN CONST IA32_DESCRIPTOR *Ldtr + ) +{ + __asm__ __volatile__ ( + "lidt %0" + : + : "m" (*Ldtr) + ); +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "sldt %0" + : "=g" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "lldtw %0" + : + : "g" (Ldtr) // %0 + ); +} + + +/** + 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. + + @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. + +**/ +VOID +EFIAPI +InternalX86FxSave ( + OUT IA32_FX_BUFFER *Buffer + ) +{ + __asm__ __volatile__ ( + "fxsave %0" + : + : "m" (*Buffer) // %0 + ); +} + + +/** + 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. + + @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. + +**/ +VOID +EFIAPI +InternalX86FxRestore ( + IN CONST IA32_FX_BUFFER *Buffer + ) +{ + __asm__ __volatile__ ( + "fxrstor %0" + : + : "m" (*Buffer) // %0 + ); +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "push %%eax \n\t" + "push %%eax \n\t" + "movq %%mm0, (%%esp)\n\t" + "pop %%eax \n\t" + "pop %%edx \n\t" + : "=A" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "push %%eax \n\t" + "push %%eax \n\t" + "movq %%mm1, (%%esp)\n\t" + "pop %%eax \n\t" + "pop %%edx \n\t" + : "=A" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "push %%eax \n\t" + "push %%eax \n\t" + "movq %%mm2, (%%esp)\n\t" + "pop %%eax \n\t" + "pop %%edx \n\t" + : "=A" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "push %%eax \n\t" + "push %%eax \n\t" + "movq %%mm3, (%%esp)\n\t" + "pop %%eax \n\t" + "pop %%edx \n\t" + : "=A" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "push %%eax \n\t" + "push %%eax \n\t" + "movq %%mm4, (%%esp)\n\t" + "pop %%eax \n\t" + "pop %%edx \n\t" + : "=A" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "push %%eax \n\t" + "push %%eax \n\t" + "movq %%mm5, (%%esp)\n\t" + "pop %%eax \n\t" + "pop %%edx \n\t" + : "=A" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "push %%eax \n\t" + "push %%eax \n\t" + "movq %%mm6, (%%esp)\n\t" + "pop %%eax \n\t" + "pop %%edx \n\t" + : "=A" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "push %%eax \n\t" + "push %%eax \n\t" + "movq %%mm7, (%%esp)\n\t" + "pop %%eax \n\t" + "pop %%edx \n\t" + : "=A" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "movq %0, %%mm0" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movq %0, %%mm1" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movq %0, %%mm2" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movq %0, %%mm3" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movq %0, %%mm4" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movq %0, %%mm5" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movq %0, %%mm6" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movq %0, %%mm7" // %0 + : + : "m" (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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "rdtsc" + : "=A" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "rdpmc" + : "=A" (Data) + : "c" (Index) + ); + + return Data; +} + + + + +/** + Executes a WBINVD instruction. + + Executes a WBINVD instruction. This function is only available on IA-32 and + X64. + +**/ +VOID +EFIAPI +AsmWbinvd ( + VOID + ) +{ + __asm__ __volatile__ ("wbinvd":::"memory"); +} + + +/** + Executes a INVD instruction. + + Executes a INVD instruction. This function is only available on IA-32 and + X64. + +**/ +VOID +EFIAPI +AsmInvd ( + VOID + ) +{ + __asm__ __volatile__ ("invd":::"memory"); + +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "clflush (%0)" + : "+a" (LinearAddress) + : + : "memory" + ); + + return LinearAddress; +} + + diff --git a/MdePkg/Library/BaseLib/X64/GccInline.c b/MdePkg/Library/BaseLib/X64/GccInline.c new file mode 100644 index 0000000000..3af0625b36 --- /dev/null +++ b/MdePkg/Library/BaseLib/X64/GccInline.c @@ -0,0 +1,1806 @@ +/** @file + GCC inline implementation of BaseLib processor specific functions. + + Copyright (c) 2006 - 2007, Intel Corporation<BR> + Portions copyright (c) 2008-2009 Apple Inc.<BR> + 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. + +**/ + + +#include "BaseLibInternals.h" + + + + +/** + 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 + ) +{ + // This is a little bit of overkill and it is more about the compiler that it is + // actually processor syncronization. This is like the _ReadWriteBarrier + // Microsft specific intrinsic + __asm__ __volatile__ ("":::"memory"); +} + + +/** + Enables CPU interrupts. + + Enables CPU interrupts. + +**/ +VOID +EFIAPI +EnableInterrupts ( + VOID + ) +{ + __asm__ __volatile__ ("sti"::: "memory"); +} + + +/** + Disables CPU interrupts. + + Disables CPU interrupts. + +**/ +VOID +EFIAPI +DisableInterrupts ( + VOID + ) +{ + __asm__ __volatile__ ("cli"::: "memory"); +} + + + + +/** + 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 + ) +{ + __asm__ __volatile__ ("pause"); +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ("int $3"); +} + + + +/** + 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 + ) +{ + UINT32 LowData; + UINT32 HighData; + + __asm__ __volatile__ ( + "rdmsr" + : "=a" (LowData), // %0 + "=d" (HighData) // %1 + : "c" (Index) // %2 + ); + + return (((UINT64)HighData) << 32) | LowData; +} + +/** + 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 + ) +{ + UINT32 LowData; + UINT32 HighData; + + LowData = (UINT32)(Value); + HighData = (UINT32)(Value >> 32); + + __asm__ __volatile__ ( + "wrmsr" + : + : "c" (Index), + "a" (LowData), + "d" (HighData) + ); + + return Value; +} + + + +/** + 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 + ) +{ + UINTN Eflags; + + __asm__ __volatile__ ( + "pushfq \n\t" + "pop %0 " + : "=r" (Eflags) // %0 + ); + + return Eflags; +} + + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%cr0,%0" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%cr2, %0" + : "=r" (Data) // %0 + ); + + return Data; +} + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%cr3, %0" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%cr4, %0" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%cr0" + : + : "r" (Cr0) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%cr2" + : + : "r" (Cr2) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%cr3" + : + : "r" (Cr3) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%cr4" + : + : "r" (Cr4) + ); + return 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%dr0, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%dr1, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%dr2, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%dr3, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%dr4, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%dr5, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%dr6, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINTN Data; + + __asm__ __volatile__ ( + "mov %%dr7, %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%dr0" + : + : "r" (Dr0) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%dr1" + : + : "r" (Dr1) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%dr2" + : + : "r" (Dr2) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%dr3" + : + : "r" (Dr3) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%dr4" + : + : "r" (Dr4) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%dr5" + : + : "r" (Dr5) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%dr6" + : + : "r" (Dr6) + ); + return 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 + ) +{ + __asm__ __volatile__ ( + "mov %0, %%dr7" + : + : "r" (Dr7) + ); + return 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%cs, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%ds, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%es, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%fs, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%gs, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "mov %%ds, %0" + :"=a" (Data) + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "str %0" + : "=r" (Data) + ); + + return Data; +} + + +/** + 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. + + @param Gdtr Pointer to a GDTR descriptor. + +**/ +VOID +EFIAPI +InternalX86ReadGdtr ( + OUT IA32_DESCRIPTOR *Gdtr + ) +{ + __asm__ __volatile__ ( + "sgdt %0" + : "=m" (*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. + + @param Gdtr Pointer to a GDTR descriptor. + +**/ +VOID +EFIAPI +InternalX86WriteGdtr ( + IN CONST IA32_DESCRIPTOR *Gdtr + ) +{ + __asm__ __volatile__ ( + "lgdt %0" + : + : "m" (*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. + + @param Idtr Pointer to a IDTR descriptor. + +**/ +VOID +EFIAPI +InternalX86ReadIdtr ( + OUT IA32_DESCRIPTOR *Ldtr + ) +{ + __asm__ __volatile__ ( + "sldt %0" + : "=m" (*Ldtr) + ); +} + + +/** + 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. + + @param Idtr Pointer to a IDTR descriptor. + +**/ +VOID +EFIAPI +InternalX86WriteIdtr ( + IN CONST IA32_DESCRIPTOR *Ldtr + ) +{ + __asm__ __volatile__ ( + "lidt %0" + : + : "m" (*Ldtr) + ); +} + + +/** + 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 + ) +{ + UINT16 Data; + + __asm__ __volatile__ ( + "sldt %0" + : "=g" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "lldtw %0" + : + : "g" (Ldtr) // %0 + ); +} + + +/** + 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. + + @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. + +**/ +VOID +EFIAPI +InternalX86FxSave ( + OUT IA32_FX_BUFFER *Buffer + ) +{ + __asm__ __volatile__ ( + "fxsave %0" + : + : "m" (*Buffer) // %0 + ); +} + + +/** + 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. + + @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. + +**/ +VOID +EFIAPI +InternalX86FxRestore ( + IN CONST IA32_FX_BUFFER *Buffer + ) +{ + __asm__ __volatile__ ( + "fxrstor %0" + : + : "m" (*Buffer) // %0 + ); +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "movd %%mm0, %0 \n\t" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "movd %%mm1, %0 \n\t" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "movd %%mm2, %0 \n\t" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "movd %%mm3, %0 \n\t" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "movd %%mm4, %0 \n\t" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "movd %%mm5, %0 \n\t" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "movd %%mm6, %0 \n\t" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + UINT64 Data; + + __asm__ __volatile__ ( + "movd %%mm7, %0 \n\t" + : "=r" (Data) // %0 + ); + + return Data; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "movd %0, %%mm0" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movd %0, %%mm1" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movd %0, %%mm2" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movd %0, %%mm3" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movd %0, %%mm4" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movd %0, %%mm5" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movd %0, %%mm6" // %0 + : + : "m" (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 + ) +{ + __asm__ __volatile__ ( + "movd %0, %%mm7" // %0 + : + : "m" (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 + ) +{ + UINT32 LowData; + UINT32 HiData; + + __asm__ __volatile__ ( + "rdtsc" + : "=a" (LowData), + "=d" (HiData) + ); + + return (((UINT64)HiData) << 32) | LowData; +} + + +/** + 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 + ) +{ + UINT32 LowData; + UINT32 HiData; + + __asm__ __volatile__ ( + "rdpmc" + : "=a" (LowData), + "=d" (HiData) + : "c" (Index) + ); + + return (((UINT64)HiData) << 32) | LowData; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "monitor" + : + : "a" (Eax), + "c" (Ecx), + "d" (Edx) + ); + + return Eax; +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "mwait" + : + : "a" (Eax), + "c" (Ecx) + ); + + return Eax; +} + + +/** + Executes a WBINVD instruction. + + Executes a WBINVD instruction. This function is only available on IA-32 and + X64. + +**/ +VOID +EFIAPI +AsmWbinvd ( + VOID + ) +{ + __asm__ __volatile__ ("wbinvd":::"memory"); +} + + +/** + Executes a INVD instruction. + + Executes a INVD instruction. This function is only available on IA-32 and + X64. + +**/ +VOID +EFIAPI +AsmInvd ( + VOID + ) +{ + __asm__ __volatile__ ("invd":::"memory"); + +} + + +/** + 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 + ) +{ + __asm__ __volatile__ ( + "clflush (%0)" + : + : "r" (LinearAddress) + : "memory" + ); + + return LinearAddress; +} + + |