diff options
Diffstat (limited to 'Board/EM/MeWrapper/AmtWrapper/AmtLockKBD/AmtInt9.asm')
| -rw-r--r-- | Board/EM/MeWrapper/AmtWrapper/AmtLockKBD/AmtInt9.asm | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/Board/EM/MeWrapper/AmtWrapper/AmtLockKBD/AmtInt9.asm b/Board/EM/MeWrapper/AmtWrapper/AmtLockKBD/AmtInt9.asm new file mode 100644 index 0000000..a40f50e --- /dev/null +++ b/Board/EM/MeWrapper/AmtWrapper/AmtLockKBD/AmtInt9.asm @@ -0,0 +1,277 @@ + + TITLE AMTINT9.ASM -- OEM INTERRUPT IMPLEMENTATION + +;************************************************************************* +;************************************************************************* +;** ** +;** (C)Copyright 1985-2010, American Megatrends, Inc. ** +;** ** +;** All Rights Reserved. ** +;** ** +;** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +;** ** +;** Phone: (770)-246-8600 ** +;** ** +;************************************************************************* +;************************************************************************* +; +; $Header: /Alaska/SOURCE/Modules/SharkBayRefCodes/ME/AmtWrapper/AmtLockKBD/AmtInt9.asm 1 2/08/12 1:10a Klzhan $ +; +; $Date: 2/08/12 1:10a $ +; +;**************************************************************************** +; Revision History +; ---------------- +; $Log: /Alaska/SOURCE/Modules/SharkBayRefCodes/ME/AmtWrapper/AmtLockKBD/AmtInt9.asm $ +; +; 1 2/08/12 1:10a Klzhan +; Initial Check in +; +; 2 7/13/11 4:03a Klzhan +; Fix Lock KBD can't work without SOL enable. +; +; 1 2/25/11 1:45a Klzhan +; Initial Check-in +; +; 1 12/03/10 5:11a Klzhan +; Initial Check-in. +; +; +;**************************************************************************** +;<AMI_FHDR_START> +; +; Name: AMTInt9.asm +; +; Description: Hook Int 9 for Legacy Serial Redirection. +; +;<AMI_FHDR_END> +;**************************************************************************** + +;---------------------------------------------------------------------------- +; INCLUDE FILES +;---------------------------------------------------------------------------- +include token.equ +;---------------------------------------------------------------------------- +; EQUATES & STRUCTURES +;---------------------------------------------------------------------------- +refresh_port equ 61h +kb_data_port equ 60h ; keyboard data port +kb_stat_port equ 64h ; keyboard status port +kbcCMDPort EQU 64h ; Keyboard controller command port +enKeyboardCMD EQU 0aeh ; Enable keyboard command +diKeyboardCMD EQU 0adh ; Disable keyboard command +IBFTimeoutCount EQU 0f000h ; Check keyboart input buffer count +kbcIBF EQU 00000010b; Keyboard input buffer full +;---------------------------------------------------------------------------- +; EXTERNS USED +;---------------------------------------------------------------------------- + +;---------------------------------------------------------------------------- +; CSMOEM_CSEG S E G M E N T STARTS +;---------------------------------------------------------------------------- +CSMOEM_CSEG SEGMENT PARA PUBLIC 'CODE' USE16 + ASSUME cs:CSMOEM_CSEG, ds:CSMOEM_CSEG +.386p +;---------------------------------------------------------------------------- + +OldIntHandler LABEL DWORD + IntSegSav dw 0 + IntOfsSav dw 0 + +;<AMI_PHDR_START> +;---------------------------------------------------------------------------- +; +; Procedure: AMTINT09Proc +; +; Description: +; +; Input: +; +; Output: +; +; Modified: +; +;---------------------------------------------------------------------------- +;<AMI_PHDR_END> +AMTINT09Proc PROC NEAR PUBLIC + pushf + cmp cs:dSredirInterruptPtr, 0 + jnz lock_local_keyboard + popf + jmp DWORD PTR cs:[OldIntHandler] +lock_local_keyboard: + push ds + push si + ; DS:SI = *dSredirInterruptPtr + lds si, DWORD PTR cs:dSredirInterruptPtr +; cmp WORD PTR ds:[si], 0 ; does interrutp come from redirection ? + test BYTE PTR ds:[si], 1 ; does interrutp come from redirection ? + jz not_serial_redirection_interrupt ; br not redirection interrupt + ; jmp to original Int 9 vector to service redirection interrupt + pushf + push cs + push OFFSET returnFromInt9 + push DWORD PTR cs:OldIntHandler + retf +returnFromInt9: +; mov WORD PTR ds:[si], 0 ; clear redirection interrupt flag + mov BYTE PTR ds:[si], 0 ; clear redirection interrupt flag + jmp redirection_return_to_caller +not_serial_redirection_interrupt: + ; do nothing and return to caller. + push ax + call disable_keyboard + call enable_keyboard + ; clear EOI + mov al, 20h ; end of INT code + out 20h, al ; out to INT CONTROLLER port + pop ax +redirection_return_to_caller: + pop si + pop ds + popf + retf 2 + +AMTINT09Proc ENDP +;<AMI_PHDR_START> +;---------------------------------------------------------------------------- +; Procedure: CheckKBCController +; +; Description: Check KBC controller present. +; +; Input: None. +; +; Output: None. +; +; Modified: ZF = 0 KBC controller present. +; = 1 No KBC controller. +; +; Referrals: +; +;---------------------------------------------------------------------------- +;<AMI_PHDR_END> +CheckKBCController PROC NEAR + push ax + in al, kb_stat_port + cmp al, 0ffh + pop ax + ret +CheckKBCController ENDP +;<AMI_PHDR_START> +;---------------------------------------------------------------------------- +; Procedure: enable_keyboard +; +; Description: Enables KBD interface. Also CPU interrupt will be enabled +; here. +; +; Input: None. +; +; Output: None. +; +; Modified: AL. +; +; Referrals: ib_free. +; +;---------------------------------------------------------------------------- +;<AMI_PHDR_END> + +enable_keyboard PROC NEAR PUBLIC + + call CheckKBCController + jz short Enable_keyboardExit + call ib_free ; Wait for input buffer free. + mov al, enKeyboardCMD ; CMD to enable KBD interface. + out kbcCMDPort, al ; Write command to KBC. + call ib_free ; Wait for input buffer free. +Enable_keyboardExit: ;(BUG4128+) + sti + ret + +enable_keyboard ENDP +;<AMI_PHDR_START> +;---------------------------------------------------------------------------- +; Procedure: disable_keyboard +; +; Description: Disables KBD interface and reads the data from KBC data port. +; +; Input: None. +; +; Output: AL - Data read from KBC data port. +; +; Modified: AL. +; +; Referrals: ib_free. +; +;---------------------------------------------------------------------------- +;<AMI_PHDR_END> + +disable_keyboard PROC NEAR PUBLIC + call CheckKBCController + jz short Disable_keyboardExit + call ib_free ; Wait for input buffer free. + mov al, diKeyboardCMD ; CMD to disable KBD interface. + out kbcCMDPort, al ; Write command to KBC. + call ib_free ; Wait for input buffer free. + in al, kb_data_port ; Read the data.(BUG2673+) +Disable_keyboardExit: ; + ret + +disable_keyboard ENDP +;<AMI_PHDR_START> +;---------------------------------------------------------------------------- +; Procedure: ib_free +; +; Description: This routine waits until the KBC input buffer is free. +; +; Input: None. +; +; Output: None. +; +; Modified: AL. +; +; Referrals: None. +; +; Notes: DO NOT USE STACK. This routine may be called with RET_SP +; macro. +; +;---------------------------------------------------------------------------- +;<AMI_PHDR_END> +ib_free PROC NEAR PUBLIC + push cx + mov cx, IBFTimeoutCount +IbFreeLp: + in al, kb_stat_port + call CheckKBCController + jz short IbFreeExit + out 0ebh, al + out 0ebh, al + out 0ebh, al + test al, kbcIBF + loopnz IbFreeLp +IbFreeExit: + pop cx + ret +ib_free ENDP + +;---------------------------------------------------------------------------- +LockKeyBoardSignature DB '$LKb' +dSredirInterruptPtr DD 0 +dLockKBD DD 0 +;---------------------------------------------------------------------------- +; CSMOEM_CSEG S E G M E N T ENDS +;---------------------------------------------------------------------------- +CSMOEM_CSEG ENDS +END +;**************************************************************************** +;**************************************************************************** +;** ** +;** (C)Copyright 1985-2009, American Megatrends, Inc. ** +;** ** +;** All Rights Reserved. ** +;** ** +;** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +;** ** +;** Phone (770)-246-8600 ** +;** ** +;**************************************************************************** +;****************************************************************************
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