diff options
Diffstat (limited to 'Core/EM/SMM/SmmDispatcherAsm.asm')
| -rw-r--r-- | Core/EM/SMM/SmmDispatcherAsm.asm | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/Core/EM/SMM/SmmDispatcherAsm.asm b/Core/EM/SMM/SmmDispatcherAsm.asm new file mode 100644 index 0000000..1abc682 --- /dev/null +++ b/Core/EM/SMM/SmmDispatcherAsm.asm @@ -0,0 +1,196 @@ +;************************************************************************* +;************************************************************************* +;** ** +;** (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 ** +;** ** +;************************************************************************* +;************************************************************************* |