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|
;
; This file contains an 'Intel Pre-EFI Module' and is licensed
; for Intel CPUs and Chipsets under the terms of your license
; agreement with Intel or your vendor. This file may be
; modified by the user, subject to additional terms of the
; license agreement
;
;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2012 Intel Corporation. All rights reserved
; This software and associated documentation (if any) is furnished
; under a license and may only be used or copied in accordance
; with the terms of the license. Except as permitted by such
; license, no part of this software or documentation may be
; reproduced, stored in a retrieval system, or transmitted in any
; form or by any means without the express written consent of
; Intel Corporation.
;
;
; Module Name:
;
; Cpu.asm
;
; Abstract:
;
; Assembly code of Cpu
;
;------------------------------------------------------------------------------
.686p
.model flat
.xmm
IA32_CR4_OSFXSR equ 200h
IA32_CR4_OSXMMEXCPT equ 400h
IA32_CR0_MP equ 2h
IA32_CPUID_SSE2 equ 02000000h
IA32_CPUID_SSE2_B equ 26
.code
;------------------------------------------------------------------------------
; Set up flags in CR4 for XMM instruction enabling
;------------------------------------------------------------------------------
XmmInit PROC C PUBLIC
push ebx
; Check whether SSE2 is supported
mov eax, 1
cpuid
bt edx, IA32_CPUID_SSE2_B
jnc @F
; Enable XMM
mov eax, cr0
or eax, IA32_CR0_MP
mov cr0, eax
mov eax, cr4
or eax, IA32_CR4_OSFXSR OR IA32_CR4_OSXMMEXCPT
mov cr4, eax
@@:
pop ebx
ret
XmmInit ENDP
;------------------------------------------------------------------------------
; Invalidate cache
;------------------------------------------------------------------------------
CacheInvd PROC C PUBLIC
invd
ret
CacheInvd ENDP
END
|
