diff options
Diffstat (limited to 'Core/EM/Sredir/SredirBootFail.asm')
| -rw-r--r-- | Core/EM/Sredir/SredirBootFail.asm | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/Core/EM/Sredir/SredirBootFail.asm b/Core/EM/Sredir/SredirBootFail.asm new file mode 100644 index 0000000..b8433b9 --- /dev/null +++ b/Core/EM/Sredir/SredirBootFail.asm @@ -0,0 +1,179 @@ +;********************************************************************** +;********************************************************************** +;** ** +;** (C)Copyright 1985-2014, American Megatrends, Inc. ** +;** ** +;** All Rights Reserved. ** +;** ** +;** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +;** ** +;** Phone: (770)-246-8600 ** +;** ** +;********************************************************************** +;********************************************************************** + +;********************************************************************** +; $Header: /Alaska/SOURCE/Modules/Legacy Serial Redirection/SredirBootFail.asm 3 6/16/14 7:40a Divyac $ +; +; $Revision: 3 $ +; +; $Date: 6/16/14 7:40a $ +;********************************************************************** +; Revision History +; ---------------- +; $Log: /Alaska/SOURCE/Modules/Legacy Serial Redirection/SredirBootFail.asm $ +; +; 3 6/16/14 7:40a Divyac +; [TAG] EIP172120 +; [Category] Bug Fix +; [Severity] Important +; [Symptom] Redirection After BIOS POST feature is not working. +; [RootCause] The flag Indicating whether redirection can happen or not +; is not updated. +; 1)The way of Defining signatures and Comparing Signatures are +; different. +; 2)The variables defined in CSM16 files( SreDirBin_Base_Segadd, +; SreDirBin_Base_Offadd, Flag ) are accessed wrongly. +; +; [Solution] a) The pointer used to check for signatures must be +; UINT32* or we should define signatures byte by byte (db +; '$','S','B','F', db '$','S','B','C'). so changed the way of defining +; Signatures in CSM16 files from dd '$SBF' to db '$','S','B','F'. +; b) Variables should be accessed using OFFSET Keyword. +; [Files] SerialBootCall.asm, SerialBootFail.asm +; +; 2 5/29/13 8:54a Srikantakumarp +; [TAG] EIP122394 +; [Category] Bug Fix +; [Severity] Normal +; [Symptom] 0xE0000~0xEFFFF was overwrite by Legacy Serial Redirection +; module. +; [RootCause] LegacySerialRedirection driver assumed that +; SerialBootcall.asm will be the first entry in CsmOem16Functions which +; was wrong. +; [Solution] Added a Signature check code for SerialBootCall.asm and +; SredirBootFail.asm before it writes to the memory location +; 0xE0000~0xEFFFF. +; [Files] LegacySredir.c, SerialBootCall.asm, SredirBootFail.asm +; +; 1 2/27/12 5:58a Jittenkumarp +; [TAG] EIP81401 +; [Category] New Feature +; [Description] Select Redirection After BIOS POST as BootLoader in +; serial redirection, the behaviour is made same as Core8. +; [Files] LegacySredir.c, LegacySredir.mak, LegacySredir.sdl, +; LegacySredir_Setup.c, LegacySredir.h ,SerialBootCall.asm, +; SredirBootFail.asm,GRAPHREDIR.ASM, INT10REDIR.ASM, OR_MOD.EQU, +; SREDIR.ASM +; +;********************************************************************** +;<AMI_FHDR_START> +; +; Name: SredirBootFail.asm +; +; Description: Call Back function registered for CSM16_OEM_ON_BOOT_FAIL +; +;<AMI_FHDR_END> +;********************************************************************** + + +;---------------------------------------------------------------------------- +; INCLUDE FILES +;---------------------------------------------------------------------------- + + include token.equ + +;---------------------------------------------------------------------------- +; EXTERNS USED +;---------------------------------------------------------------------------- + +.586p +OEM16_CSEG SEGMENT PARA PUBLIC 'CODE' USE16 + ASSUME cs:OEM16_CSEG, ds:OEM16_CSEG +;------------------------------------------------------------------------- + PUBLIC EnableLegcaySredirModuleStart +EnableLegcaySredirModuleStart LABEL BYTE + jmp SHORT EnableLegcaySredirCsm16Api + db '$','S','B','F' +SreDirBin_Base_Segadd dw 0000h ;SreDirBin Segement Address +SreDirBin_Base_Offadd dw 0000h ;SreDirbin offset Address +Flag dw 0000h + + +;---------------------------------------------------------------------------- +; IMPORTANT: Do not put any OEM/CHIPSET code above this, the above code and +; and data are at fixed locations. +;---------------------------------------------------------------------------- + +;------------------------------------------------------------------------- +; LEGACYSREDIR_CSM16_API_Start +;---------------------------------------------------------------------------- +; This routine is implementation of the CSM16 API #6. +; Input: BX - SreDirBin Segment add +; BX - SreDirBin Offset add +; AX - Flag offset value +; +; Output: None +; +; Register Usage: Do not destroy any register +; +;---------------------------------------------------------------------------- + +EnableLegcaySredirCsm16Api PROC FAR PUBLIC +; Adjust current IP so that the data offsets are valid + + call $+3 ; Push curent IP + pop bx ; Get current IP in BX + shr bx, 4 + mov ax, cs ; Always x000h + add ax, bx ; New CS + push ax + push newOffset-EnableLegcaySredirModuleStart + retf ; Execute from new CS:IP + +newOffset: + + push bx + push si + push ax + push es + push 0 + pop es + mov si, offset SreDirBin_Base_Segadd + mov bx, word ptr cs:[si] + mov es, bx + mov si, offset SreDirBin_Base_Offadd + mov bx, word ptr cs:[si] + mov si, offset Flag + mov ax, word ptr cs:[si] + mov si, ax + add si, bx + mov al, 00h + mov byte ptr es:[si], al + + pop es + pop ax + pop si + pop bx + + retf + +EnableLegcaySredirCsm16Api ENDP + +OEM16_CSEG ENDS + +END + +;********************************************************************** +;********************************************************************** +;** ** +;** (C)Copyright 1985-2014, American Megatrends, Inc. ** +;** ** +;** All Rights Reserved. ** +;** ** +;** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +;** ** +;** Phone: (770)-246-8600 ** +;** ** +;********************************************************************** +;**********************************************************************
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