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;*************************************************************************
;*************************************************************************
;** **
;** (C)Copyright 1985-2009, American Megatrends, Inc. **
;** **
;** All Rights Reserved. **
;** **
;** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
;** **
;** Phone: (770)-246-8600 **
;** **
;*************************************************************************
;*************************************************************************
;**********************************************************************
; $Header: /Alaska/SOURCE/Modules/SMM/SMMDispatcher/SmmDispatcherAsm.asm 4 10/03/11 2:53p Markw $
;
; $Revision: 4 $
;
; $Date: 10/03/11 2:53p $
;**********************************************************************
; Revision History
; ----------------
; $Log: /Alaska/SOURCE/Modules/SMM/SMMDispatcher/SmmDispatcherAsm.asm $
;
; 4 10/03/11 2:53p Markw
; Add SMM Machine Check handler.
; Files: SmmDispatcher.c, SmmDispatcherAsm.asm
;
; 3 7/08/09 8:18p Markw
; Update headers.
;
; 2 11/21/08 5:00p Markw
; Add LockInc32 and LockDec32.
;
; 1 6/09/08 5:56p Markw
; Assembly functions for Dispatcher.
;
;**********************************************************************
;<AMI_FHDR_START>
;----------------------------------------------------------------------------
;
; Name: SmmDispatcher.asm
;
; Description: File that contains assembly for Smm Dispatcher.
;
;----------------------------------------------------------------------------
;<AMI_FHDR_END>
IFDEF EFIx64
.code
include token.equ
;<AMI_PHDR_START>
;----------------------------------------------------------------------------
;
; Procedure: Xchg8
;
; Description: Exchange a value with a pointer and return the exchanged value.
;
; Input:
; IN OUT volatile UINT8 * Pointer to value to exchange.
; IN UINT8 Value to exchange.
;
; Output: UINT8 Exchanged Value
;
; Modified: Nothing
;
;----------------------------------------------------------------------------
;<AMI_PHDR_END>
Xchg8 proc public
xchg dl, [rcx]
mov al, dl
ret
Xchg8 endp
;<AMI_PHDR_START>
;---------------------------------------------------------------------------
;
; Procedure: LockInc32
;
; Description: Increment value at pointer locking address.
;
; Input: IN OUT UINT32 *ptr
;
; Output: None
;---------------------------------------------------------------------------
;<AMI_PHDR_END>
LockInc32 proc public
lock inc dword ptr [rcx]
ret
LockInc32 endp
;<AMI_PHDR_START>
;---------------------------------------------------------------------------
;
; Procedure: LockDec32
;
; Description: Decrement value at pointer locking address.
;
; Input: IN OUT UINT32 *ptr
;
; Output: None
;---------------------------------------------------------------------------
;<AMI_PHDR_END>
LockDec32 proc public
lock dec dword ptr [rcx]
ret
LockDec32 endp
;<AMI_PHDR_START>
;---------------------------------------------------------------------------
;
; Procedure: MachineCheckHandler
;
; Description: SMM Machine Check Handler
;
; Input: VOID
;
; Output: VOID
;---------------------------------------------------------------------------
;<AMI_PHDR_END>
MachineCheckHandler proc public
push rax
push rcx
push rdx
mov ecx, 17ah ;IA32_MCG_STATUS
rdmsr
btr eax, 2 ;MCIP
wrmsr
pop rdx
pop rcx
pop rax
iretq
MachineCheckHandler endp
ELSE ;32-bits
.586p
.model small
.code
_Xchg8 proc public
mov al, [esp + 8]
mov edx, [esp + 4]
xchg al, [edx]
ret
_Xchg8 endp
_LockInc32 proc public
mov eax, [esp + 4]
lock inc dword ptr [eax]
ret
_LockInc32 endp
_LockDec32 proc public
mov eax, [esp + 4]
lock dec dword ptr [eax]
ret
_LockDec32 endp
_MachineCheckHandler proc public
push eax
push ecx
push edx
mov ecx, 17ah ;IA32_MCG_STATUS
rdmsr
btr eax, 2 ;MCIP
wrmsr
pop edx
pop ecx
pop eax
iretd
_MachineCheckHandler endp
ENDIF
end
;*************************************************************************
;*************************************************************************
;** **
;** (C)Copyright 1985-2008, American Megatrends, Inc. **
;** **
;** All Rights Reserved. **
;** **
;** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
;** **
;** Phone: (770)-246-8600 **
;** **
;*************************************************************************
;*************************************************************************
|
