PAGE 58,132
;******************************************************************************
TITLE VMIRQD - Virtual <Monitor I/O Traffic> Device
;******************************************************************************
;
; (C) Copyright MICROSOFT Corp., 1992
;
; Title: VMIRQD.ASM - Virtual <Monitor IRQ traffic> Device
;
; Version: 3.10
;
; Date: 10-Mar-1992
;
; Author: Neil Sandlin
;
; Description:
; This VxD demonstrates calling the VPICD_Virtualize_IRQ service.
; Although most VxDs that use this service are designed to only
; arbitrate the handling of the interrupt, this VxD will write
; to a secondary monitor to display the activity on the IRQ.
;
; THE SYSTEM WILL ONLY ALLOW ONE IRQ HANDLER PER IRQ. What this
; means is that you can't virtualize an IRQ that is already
; virtualized in the system.
;
; This VxD only demonstrates IRQ virtualization, NOT I/O port
; trapping. See the VMIOD VxD sample for more information about
; working with I/O port trapping.
;
; NOTE: This VxD uses the Debug Monitor support that was added
; in Windows 3.1. You must have a secondary monitor in your system
; to see the effects of this VxD. To enable this support, put
; DebugMono=TRUE in your system.ini.
;
;------------------------------------------------------------------------------
;
; Change log:
;
; DATE REV DESCRIPTION
; ----------- --- -----------------------------------------------------------
;
;==============================================================================
.386p
;******************************************************************************
; I N C L U D E S
;******************************************************************************
.XLIST
INCLUDE VMM.Inc
INCLUDE Debug.Inc
INCLUDE VPICD.Inc
INCLUDE VMIRQD.Inc
.LIST
;******************************************************************************
; V I R T U A L D E V I C E D E C L A R A T I O N
;******************************************************************************
Declare_Virtual_Device VMIRQD, 3, 0ah, VMIRQD_Control, VMIRQD_Dev_ID ,,,
;******************************************************************************
; L O C A L D A T A
;******************************************************************************
VxD_LOCKED_DATA_SEG
VMIRQD_IRQ_Handle dd ?
VMIRQD_IRQ db ?
FirstMonoLine equ 2
LastMonoLine equ 23
CurrentLine db ?
vstring db "Virtual interrupt reflected",0
rstring db "IRET executed",0
mstring db "Mask change",0
istring db "Physical Interrupt",0
estring db "EOI issued"
BlankPointer db " ",0
NewLine db "---> ",0
VxD_LOCKED_DATA_ENDS
;******************************************************************************
; I N I T I A L I Z A T I O N
;******************************************************************************
VxD_IDATA_SEG
VMIRQD_Ini_String db 'VMIRQD_IRQ',0
VMIRQD_IRQ_Desc VPICD_IRQ_Descriptor <?,VPICD_Opt_Read_Hw_IRR, \
OFFSET32 VMIRQD_Hw_INT, \
OFFSET32 VMIRQD_Virt_INT, \
OFFSET32 VMIRQD_EOI, \
OFFSET32 VMIRQD_Mask_Change, \
OFFSET32 VMIRQD_IRET>
VxD_IDATA_ENDS
VxD_ICODE_SEG
;******************************************************************************
;
; VMIRQD_Device_Init
;
; DESCRIPTION:
; This routine will virtualize the IRQ specified in the SYSTEM.INI
; string VMIRQD_IRQ=x.
;
;==============================================================================
BeginProc VMIRQD_Device_Init
call Mon_Init ; init secondary monitor
jc short diexit
mov eax, -1 ; default IRQ
mov edi, OFFSET32 VMIRQD_Ini_String
xor esi, esi ; [386enh] section
VMMCall Get_Profile_Decimal_Int ; get defined IRQ
mov BYTE PTR [VMIRQD_IRQ], al ; save it
cmp eax, -1 ; anything specified?
jz SHORT No_Irq
mov edi, OFFSET32 VMIRQD_IRQ_Desc ; point to vpicd struct
mov [edi.VID_IRQ_Number], ax ; save it here
VxDCall VPICD_Virtualize_IRQ ; set up callbacks
IFDEF DEBUG
jc short bad_irq
mov al, [VMIRQD_IRQ]
Trace_Out "VMIRQD: Installed on IRQ #AL"
jmp short diexit
bad_irq:
mov al, [VMIRQD_IRQ]
Trace_Out "VMIRQD: Error installing on IRQ #AL"
jmp short diexit
ENDIF
No_Irq:
IFDEF DEBUG
Trace_Out "VMIRQD: No VMIRQD_IRQ= specified in SYSTEM.INI"
ENDIF
diexit:
clc
ret
EndProc VMIRQD_Device_Init
VxD_ICODE_ENDS
;******************************************************************************
VxD_LOCKED_CODE_SEG
;******************************************************************************
;
; VMIRQD_Control
;
;
;==============================================================================
BeginProc VMIRQD_Control
Control_Dispatch Device_Init, VMIRQD_Device_Init
clc
ret
EndProc VMIRQD_Control
;******************************************************************************
;
; VMIRQD_Virt_Int
;
; DESCRIPTION:
; This routine is called by VPICD when a virtual interrupt is
; reflected.
;
;==============================================================================
BeginProc VMIRQD_Virt_Int, High_Freq
push esi
mov esi, OFFSET32 vstring
call Mon_Out_String
pop esi
clc
ret
EndProc VMIRQD_Virt_Int
;******************************************************************************
;
; VMIRQD_IRET
;
; DESCRIPTION:
; This routine is called by VPICD when the virtual machine IRETs
; at the end of an interrupt.
;
;==============================================================================
BeginProc VMIRQD_IRET, High_Freq
push esi
mov esi, OFFSET32 rstring
call Mon_Out_String
pop esi
clc
ret
EndProc VMIRQD_IRET
;******************************************************************************
;
; VMIRQD_Mask_Change
;
; DESCRIPTION:
; This routine is called by VPICD when the virtual machine changes
; the state of the interrupt enabled flag in the mask register.
;
;==============================================================================
BeginProc VMIRQD_Mask_Change, High_Freq
push esi
mov esi, OFFSET32 mstring
call Mon_Out_String
pop esi
clc
ret
EndProc VMIRQD_Mask_Change
;******************************************************************************
; H A R D W A R E I N T E R R U P T R O U T I N E S
;******************************************************************************
;******************************************************************************
;
; VMIRQD_Hw_Int
;
; DESCRIPTION:
; This routine is called at the time of the actual hardware interrupt.
;
;
;==============================================================================
BeginProc VMIRQD_Hw_Int, High_Freq
push esi
mov esi, OFFSET32 istring
call Mon_Out_String
pop esi
VxDjmp VPICD_Set_Int_Request
EndProc VMIRQD_Hw_Int
;******************************************************************************
;
; VMIRQD_EOI
;
; DESCRIPTION:
; This routine is called by VPICD when an EOI is performed.
;
;
;==============================================================================
BeginProc VMIRQD_EOI, High_Freq
push esi
mov esi, OFFSET32 estring
call Mon_Out_String
pop esi
VxDCall VPICD_Phys_EOI
VxDjmp VPICD_Clear_Int_Request
EndProc VMIRQD_EOI
VxD_LOCKED_CODE_ENDS
;******************************************************************************
;******************************************************************************
;
; Monitor Display Routines
;
;******************************************************************************
VxD_ICODE_SEG
;******************************************************************************
;
; Mon_Init
;
;
;==============================================================================
BeginProc Mon_Init
VMMCall Clear_Mono_Screen
jz short mon_init_error
Mono_Out_At 0, 0, " VMIRQD - IRQ monitor "
Mono_Out_At 1, 0, " --------------------------------------------------------------------------- "
mov byte ptr [CurrentLine], 2
clc
ret
mon_init_error:
Trace_Out "No mono display: VMIRQD"
stc
ret
EndProc Mon_Init
VxD_ICODE_ENDS
VxD_LOCKED_CODE_SEG
;******************************************************************************
;
; Mon_Out_String
;
; DESCRIPTION:
;
; ENTRY:
; ESI - offset of string
;
;
;==============================================================================
BeginProc Mon_Out_String
pushad
push esi ;save output string
movzx edx, [CurrentLine]
shl edx, 8 ;column zero
VMMCall Set_Mono_Cur_Pos
mov esi, OFFSET32 BlankPointer
VMMCall Out_Mono_String
movzx edx, [CurrentLine] ;update line pointer
inc edx
cmp edx, LastMonoLine ;too far?
jb short moc_ok
mov edx, FirstMonoLine
moc_ok:
mov [CurrentLine], dl
shl edx, 8
VMMCall Set_Mono_Cur_Pos
mov esi, OFFSET32 NewLine ;set up new line
VMMCall Out_Mono_String
mov dh, [CurrentLine]
mov dl, 5 ;column 5
VMMCall Set_Mono_Cur_Pos
pop esi ;write new string
VMMCall Out_Mono_String
popad
ret
EndProc Mon_Out_String
VxD_LOCKED_CODE_ENDS
END
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