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/*++
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
CpuIA32.c
Abstract:
--*/
#include "CpuIA32.h"
VOID
EfiHalt (VOID)
{
__asm {
hlt
}
}
VOID
EfiWbinvd (VOID)
{
__asm {
wbinvd
}
}
VOID
EfiInvd (VOID)
{
__asm {
invd
}
}
VOID
EfiCpuid (IN UINT32 RegisterInEax,
OUT EFI_CPUID_REGISTER *Reg OPTIONAL)
{
__asm {
pushad
mov eax, RegisterInEax
cpuid
cmp Reg, 0
je _Exit
mov edi, DWORD PTR Reg
mov DWORD PTR [edi].RegEax, eax ; Reg->RegEax
mov DWORD PTR [edi].RegEbx, ebx ; Reg->RegEbx
mov DWORD PTR [edi].RegEcx, ecx ; Reg->RegEcx
mov DWORD PTR [edi].RegEdx, edx ; Reg->RegEdx
_Exit:
popad
}
}
UINT64
EfiReadMsr (IN UINT32 Index)
{
__asm {
mov ecx, Index
rdmsr
}
}
VOID
EfiWriteMsr (
IN UINT32 Index,
IN UINT64 Value
)
{
__asm {
mov ecx, Index
mov eax, DWORD PTR Value[0]
mov edx, DWORD PTR Value[4]
wrmsr
}
}
UINT64
EfiReadTsc (VOID)
{
__asm {
rdtsc
}
}
VOID
EfiDisableCache (VOID)
{
__asm {
mov eax, cr0
bswap eax
and al, 60h
cmp al, 60h
je Exit
mov eax, cr0
or eax, 060000000h
mov cr0, eax
wbinvd
Exit:
}
}
VOID
EfiEnableCache (VOID)
{
__asm {
wbinvd
mov eax, cr0
and eax, 09fffffffh
mov cr0, eax
}
}
UINT32
EfiGetEflags (
VOID
)
{
__asm {
pushfd
pop eax
}
}
VOID
EfiDisableInterrupts (VOID)
{
__asm {
cli
}
}
VOID
EfiEnableInterrupts (
VOID
)
{
__asm {
sti
}
}
VOID
EfiCpuidExt (
IN UINT32 RegisterInEax,
IN UINT32 CacheLevel,
OUT EFI_CPUID_REGISTER *Regs
)
{
__asm {
pushad
mov eax, RegisterInEax
mov ecx, CacheLevel
cpuid
mov edi, DWORD PTR Regs
mov DWORD PTR [edi].RegEax, eax ; Reg->RegEax
mov DWORD PTR [edi].RegEbx, ebx ; Reg->RegEbx
mov DWORD PTR [edi].RegEcx, ecx ; Reg->RegEcx
mov DWORD PTR [edi].RegEdx, edx ; Reg->RegEdx
popad
}
}
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