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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 **
;** **
;****************************************************************************
;****************************************************************************
|
