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;
; Copyright (c) 2006-2008 Advanced Micro Devices,Inc. ("AMD").
;
; This library is free software; you can redistribute it and/or modify
; it under the terms of the GNU Lesser General Public License as
; published by the Free Software Foundation; either version 2.1 of the
; License, or (at your option) any later version.
;
; This code is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; Lesser General Public License for more details.
;
; You should have received a copy of the GNU Lesser General
; Public License along with this library; if not, write to the
; Free Software Foundation, Inc., 59 Temple Place, Suite 330,
; Boston, MA 02111-1307 USA
;
;* Function: *
;* Implements the SYS_GENERATE_IRQ & SYS_MAP_IRQ macros.
include vsa2.inc
include sysmgr.inc
.model tiny,c
.586p
.CODE
externdef sys_system_call:proc
;***********************************************************************
;***********************************************************************
sys_map_irq proc pascal \
Y_Source: byte, \
IRQ: byte
mov bl, [Y_Source]
mov cl, [IRQ]
mov ax, SYS_CODE_IRQ_MAPPER
call sys_system_call
ret
sys_map_irq endp
;***********************************************************************
; void sys_generate_IRQ(USHORT Irq);
;
; Generates an IRQ upon exit from SMM
; NOTE: If 8 MSBs of Irq are non-zero, then IRQ is set to external
;***********************************************************************
sys_generate_IRQ proc pascal \
Irq: word
xor bx, bx ; Get ptr to SysMgr's IRQ_Mask
mov ebx, (VSM_Header PTR [bx]).SysStuff.SysMgr_Ptr
mov cx, [Irq] ; Get IRQ number
mov eax, 00010001h ; Generate bit mask
shl eax, cl
or ch, ch ; Disable internal IRQ external ?
jz short AssertIRQ
not ax ; Yes
mov ebx, fs:(InfoStuff PTR [ebx]).IRQ_Base
and fs:[ebx], ax ; Mark IRQ as external
jmp short Exit
AssertIRQ:
lea ebx, (InfoStuff PTR [ebx]).IRQ_Mask
or fs:[ebx], eax ; Record IRQ to be generated
Exit: ret
sys_generate_IRQ endp
END
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