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TITLE CpuIA32.asm: Assembly code for the IA-32 resources
;*****************************************************************************
;*
;* Copyright (c) 2004 - 2006, Intel Corporation
;* All rights reserved. This program and the accompanying materials
;* are licensed and made available under the terms and conditions of the BSD License
;* which accompanies this distribution. The full text of the license may be found at
;* http://opensource.org/licenses/bsd-license.php
;*
;* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
;* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;*
;* Module Name:
;*
;* CpuIA32.asm
;*
;* Abstract:
;*
;*****************************************************************************
.686P
.MODEL FLAT,C
.CODE
INCLUDE IA32Type.inc
;------------------------------------------------------------------------------
; VOID
; EfiHalt (
; VOID
; )
;------------------------------------------------------------------------------
EfiHalt PROC PUBLIC
hlt
ret
EfiHalt ENDP
;------------------------------------------------------------------------------
; VOID
; EfiWbinvd (
; VOID
; )
;------------------------------------------------------------------------------
EfiWbinvd PROC PUBLIC
wbinvd
ret
EfiWbinvd ENDP
;------------------------------------------------------------------------------
; VOID
; EfiInvd (
; VOID
; )
;------------------------------------------------------------------------------
EfiInvd PROC PUBLIC
invd
ret
EfiInvd ENDP
;------------------------------------------------------------------------------
; VOID
; EfiCpuid (
; IN UINT32 RegisterInEax,
; OUT EFI_CPUID_REGISTER *Reg OPTIONAL
; )
;------------------------------------------------------------------------------
EfiCpuid PROC PUBLIC RegisterInEax:UINT32, Reg:PTR EFI_CPUID_REGISTER
pushad
mov eax, RegisterInEax
cpuid
cmp Reg, 0
je _Exit
mov edi, DWORD PTR Reg
ASSUME edi: PTR EFI_CPUID_REGISTER
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
ret
EfiCpuid ENDP
;------------------------------------------------------------------------------
; UINT64
; EfiReadMsr (
; IN UINT32 Index,
; )
;------------------------------------------------------------------------------
EfiReadMsr PROC PUBLIC Index:UINT32
push ecx
mov ecx, Index
rdmsr
pop ecx
ret
EfiReadMsr ENDP
;------------------------------------------------------------------------------
; VOID
; EfiWriteMsr (
; IN UINT32 Index,
; IN UINT64 Value
; )
;------------------------------------------------------------------------------
EfiWriteMsr PROC PUBLIC Index:UINT32, Value:UINT64
pushad
mov ecx, Index
mov eax, DWORD PTR Value[0]
mov edx, DWORD PTR Value[4]
wrmsr
popad
ret
EfiWriteMsr ENDP
;------------------------------------------------------------------------------
; UINT64
; EfiReadTsc (
; VOID
; );
;------------------------------------------------------------------------------
EfiReadTsc PROC PUBLIC
rdtsc
ret
EfiReadTsc ENDP
;------------------------------------------------------------------------------
; VOID
; EfiDisableCache (
; VOID
; );
;------------------------------------------------------------------------------
EfiDisableCache PROC PUBLIC
; added a check to see if cache is already disabled. If it is, then skip.
push eax
mov eax, cr0
bswap eax
and al, 60h
cmp al, 60h
je @f
wbinvd
mov eax, cr0
or eax, 060000000h
mov cr0, eax
@@:
pop eax
ret
EfiDisableCache ENDP
;------------------------------------------------------------------------------
; VOID
; EfiEnableCache (
; VOID
; );
;------------------------------------------------------------------------------
EfiEnableCache PROC PUBLIC
push eax
wbinvd
mov eax, cr0
and eax, 09fffffffh
mov cr0, eax
pop eax
ret
EfiEnableCache ENDP
;------------------------------------------------------------------------------
; UINT32
; EfiGetEflags (
; VOID
; );
;------------------------------------------------------------------------------
EfiGetEflags PROC PUBLIC
pushfd
pop eax
ret
EfiGetEflags ENDP
;------------------------------------------------------------------------------
; VOID
; EfiDisableInterrupts (
; VOID
; );
;------------------------------------------------------------------------------
EfiDisableInterrupts PROC PUBLIC
cli
ret
EfiDisableInterrupts ENDP
;------------------------------------------------------------------------------
; VOID
; EfiEnableInterrupts (
; VOID
; );
;------------------------------------------------------------------------------
EfiEnableInterrupts PROC PUBLIC
sti
ret
EfiEnableInterrupts ENDP
;------------------------------------------------------------------------------
; VOID
; EfiCpuidExt (
; IN UINT32 RegisterInEax,
; IN UINT32 CacheLevel,
; OUT EFI_CPUID_REGISTER *Regs
; )
;------------------------------------------------------------------------------
EfiCpuidExt PROC PUBLIC \
RegisterInEax:UINT32, \
CacheLevel:UINT32, \
Regs:PTR EFI_CPUID_REGISTER
pushad
mov eax, RegisterInEax
mov ecx, CacheLevel
cpuid
mov edi, DWORD PTR Regs
ASSUME edi: PTR EFI_CPUID_REGISTER
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
ret
EfiCpuidExt ENDP
END
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