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title "ix ioaccess";++;; Copyright (c) 1989 Microsoft Corporation;; Module Name:;; ixioacc.asm;; Abstract:;; Procedures to correctly touch I/O registers.;; Author:;; Bryan Willman (bryanwi) 16 May 1990;; Environment:;; User or Kernel, although privledge (IOPL) may be required.;; Revision History:;;--
.386p include callconv.inc .list
_TEXT SEGMENT DWORD PUBLIC 'CODE' ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
;++;; I/O port space read and write functions.;; These have to be actual functions on the 386, because we need; to use assembler, but cannot return a value if we inline it.;; This set of functions manipulates I/O registers in PORT space.; (Uses x86 in and out instructions);; WARNING: Port addresses must always be in the range 0 to 64K, because; that's the range the hardware understands.;;--
;++;; UCHAR; READ_PORT_UCHAR(; PUCHAR Port; );; Arguments:; (esp+4) = Port;; Returns:; Value in Port.;;--cPublicProc _READ_PORT_UCHAR,1
mov dx,[esp+4] ; (dx) = Port in al,dx stdRET _READ_PORT_UCHAR
stdENDP _READ_PORT_UCHAR
;++;; USHORT; READ_PORT_USHORT(; PUSHORT Port; );; Arguments:; (esp+4) = Port;; Returns:; Value in Port.;;--cPublicProc _READ_PORT_USHORT,1
mov dx,[esp+4] ; (dx) = Port in ax,dx stdRET _READ_PORT_USHORT
stdENDP _READ_PORT_USHORT
;++;; ULONG; READ_PORT_ULONG(; PULONG Port; );; Arguments:; (esp+4) = Port;; Returns:; Value in Port.;;--cPublicProc _READ_PORT_ULONG,1
mov dx,[esp+4] ; (dx) = Port in eax,dx stdRET _READ_PORT_ULONG
stdENDP _READ_PORT_ULONG
;++;; VOID; READ_PORT_BUFFER_UCHAR(; PUCHAR Port,; PUCHAR Buffer,; ULONG Count; );; Arguments:; (esp+4) = Port; (esp+8) = Buffer address; (esp+12) = Count;;--cPublicProc _READ_PORT_BUFFER_UCHAR,3
mov dx,[esp+4] ; (dx) = Port mov ecx,[esp+12] ; (ecx) = transfer count push edi mov edi,[esp+12] ; (edi) = (esp+8+push) = buffer rep insb pop edi stdRET _READ_PORT_BUFFER_UCHAR
stdENDP _READ_PORT_BUFFER_UCHAR
;++;; VOID; READ_PORT_BUFFER_USHORT(; PUSHORT Port,; PUSHORT Buffer,; ULONG Count; );; Arguments:; (esp+4) = Port; (esp+8) = Buffer address; (esp+12) = Count;;--cPublicProc _READ_PORT_BUFFER_USHORT,3
mov dx,[esp+4] ; (dx) = Port mov ecx,[esp+12] ; (ecx) = transfer count push edi mov edi,[esp+12] ; (edi) = (esp+8+push) = buffer rep insw pop edi stdRET _READ_PORT_BUFFER_USHORT
stdENDP _READ_PORT_BUFFER_USHORT
;++;; VOID; READ_PORT_BUFFER_ULONG(; PULONG Port,; PULONG Buffer,; ULONG Count; );; Arguments:; (esp+4) = Port; (esp+8) = Buffer address; (esp+12) = Count;;--cPublicProc _READ_PORT_BUFFER_ULONG,3
mov dx,[esp+4] ; (dx) = Port mov ecx,[esp+12] ; (ecx) = transfer count push edi mov edi,[esp+12] ; (edi) = (esp+8+push) = buffer rep insd pop edi stdRET _READ_PORT_BUFFER_ULONG
stdENDP _READ_PORT_BUFFER_ULONG
;++;; VOID; WRITE_PORT_UCHAR(; PUCHAR Port,; UCHAR Value; );; Arguments:; (esp+4) = Port; (esp+8) = Value;;--cPublicProc _WRITE_PORT_UCHAR,2
mov dx,[esp+4] ; (dx) = Port mov al,[esp+8] ; (al) = Value out dx,al stdRET _WRITE_PORT_UCHAR
stdENDP _WRITE_PORT_UCHAR
;++;; VOID; WRITE_PORT_USHORT(; PUSHORT Port,; USHORT Value; );; Arguments:; (esp+4) = Port; (esp+8) = Value;;--cPublicProc _WRITE_PORT_USHORT,2
mov dx,[esp+4] ; (dx) = Port mov ax,[esp+8] ; (ax) = Value out dx,ax stdRET _WRITE_PORT_USHORT
stdENDP _WRITE_PORT_USHORT
;++;; VOID; WRITE_PORT_ULONG(; PULONG Port,; ULONG Value; );; Arguments:; (esp+4) = Port; (esp+8) = Value;;--cPublicProc _WRITE_PORT_ULONG,2
mov dx,[esp+4] ; (dx) = Port mov eax,[esp+8] ; (eax) = Value out dx,eax stdRET _WRITE_PORT_ULONG
stdENDP _WRITE_PORT_ULONG
;++;; VOID; WRITE_PORT_BUFFER_UCHAR(; PUCHAR Port,; PUCHAR Buffer,; ULONG Count; );; Arguments:; (esp+4) = Port; (esp+8) = Buffer address; (esp+12) = Count;;--cPublicProc _WRITE_PORT_BUFFER_UCHAR,3
mov dx,[esp+4] ; (dx) = Port mov ecx,[esp+12] ; (ecx) = transfer count push esi mov esi,[esp+12] ; (esi) = (esp+8+push) = buffer rep outsb pop esi stdRET _WRITE_PORT_BUFFER_UCHAR
stdENDP _WRITE_PORT_BUFFER_UCHAR
;++;; VOID; WRITE_PORT_BUFFER_USHORT(; PUSHORT Port,; PUSHORT Buffer,; ULONG Count; );; Arguments:; (esp+4) = Port; (esp+8) = Buffer address; (esp+12) = Count;;--cPublicProc _WRITE_PORT_BUFFER_USHORT,3
mov dx,[esp+4] ; (dx) = Port mov ecx,[esp+12] ; (ecx) = transfer count push esi mov esi,[esp+12] ; (esi) = (esp+8+push) = buffer rep outsw pop esi stdRET _WRITE_PORT_BUFFER_USHORT
stdENDP _WRITE_PORT_BUFFER_USHORT
;++;; VOID; WRITE_PORT_BUFFER_ULONG(; PULONG Port,; PULONG Buffer,; ULONG Count; );; Arguments:; (esp+4) = Port; (esp+8) = Buffer address; (esp+12) = Count;;--cPublicProc _WRITE_PORT_BUFFER_ULONG,3
mov dx,[esp+4] ; (dx) = Port mov ecx,[esp+12] ; (ecx) = transfer count push esi mov esi,[esp+12] ; (esi) = (esp+8+push) = buffer rep outsd pop esi stdRET _WRITE_PORT_BUFFER_ULONG
stdENDP _WRITE_PORT_BUFFER_ULONG
_TEXT ends end
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