mirror of
https://github.com/mpv-player/mpv
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5f3109cf12
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4165 b3059339-0415-0410-9bf9-f77b7e298cf2
162 lines
5.0 KiB
C
162 lines
5.0 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/os2/os2_video.c,v 3.14 2000/10/28 01:42:28 mvojkovi Exp $ */
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/* Modified for libdha by Nick Kurshev. */
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/*
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* (c) Copyright 1994,1999 by Holger Veit
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* <Holger.Veit@gmd.de>
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* Modified 1996 by Sebastien Marineau <marineau@genie.uottawa.ca>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* HOLGER VEIT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of Holger Veit shall not be
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* used in advertising or otherwise to promote the sale, use or other dealings
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* in this Software without prior written authorization from Holger Veit.
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*
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*/
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/* $XConsortium: os2_video.c /main/8 1996/10/27 11:49:02 kaleb $ */
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#define INCL_DOSFILEMGR
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#include "os2.h"
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/***************************************************************************/
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/* Video Memory Mapping helper functions */
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/***************************************************************************/
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/* This section uses the xf86sup.sys driver developed for xfree86.
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* The driver allows mapping of physical memory
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* You must install it with a line DEVICE=path\xf86sup.sys in config.sys.
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*/
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static HFILE mapdev = -1;
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static ULONG stored_virt_addr;
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static char* mappath = "\\DEV\\PMAP$";
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static HFILE open_mmap()
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{
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APIRET rc;
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ULONG action;
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if (mapdev != -1)
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return mapdev;
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rc = DosOpen((PSZ)mappath, (PHFILE)&mapdev, (PULONG)&action,
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(ULONG)0, FILE_SYSTEM, FILE_OPEN,
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OPEN_SHARE_DENYNONE|OPEN_FLAGS_NOINHERIT|OPEN_ACCESS_READONLY,
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(ULONG)0);
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if (rc!=0)
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mapdev = -1;
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return mapdev;
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}
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static void close_mmap()
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{
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if (mapdev != -1)
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DosClose(mapdev);
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mapdev = -1;
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}
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/* this structure is used as a parameter packet for the direct access
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* ioctl of pmap$
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*/
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/* Changed here for structure of driver PMAP$ */
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typedef struct{
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ULONG addr;
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ULONG size;
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} DIOParPkt;
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/* This is the data packet for the mapping function */
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typedef struct {
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ULONG addr;
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USHORT sel;
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} DIODtaPkt;
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/***************************************************************************/
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/* Video Memory Mapping section */
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/***************************************************************************/
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static long callcount = 0L;
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/* ARGSUSED */
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void * map_phys_mem(unsigned long base, unsigned long size)
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{
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DIOParPkt par;
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ULONG plen;
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DIODtaPkt dta;
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ULONG dlen;
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static BOOL ErrRedir = FALSE;
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APIRET rc;
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par.addr = (ULONG)base;
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par.size = (ULONG)size;
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plen = sizeof(par);
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dlen = sizeof(dta);
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open_mmap();
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if (mapdev == -1)
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{
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perror("libdha: device xf86sup.sys is not installed");
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exit(1);
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}
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if ((rc=DosDevIOCtl(mapdev, (ULONG)0x76, (ULONG)0x44,
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(PVOID)&par, (ULONG)plen, (PULONG)&plen,
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(PVOID)&dta, (ULONG)dlen, (PULONG)&dlen)) == 0) {
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if (dlen==sizeof(dta)) {
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callcount++;
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return (void *)dta.addr;
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}
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/*else fail*/
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}
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return (void *)-1;
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}
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/* ARGSUSED */
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void unmap_phys_mem(void * base, unsigned long size)
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{
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DIOParPkt par;
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ULONG plen,vmaddr;
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/* We need here the VIRTADDR for unmapping, not the physical address */
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/* This should be taken care of either here by keeping track of allocated */
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/* pointers, but this is also already done in the driver... Thus it would */
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/* be a waste to do this tracking twice. Can this be changed when the fn. */
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/* is called? This would require tracking this function in all servers, */
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/* and changing it appropriately to call this with the virtual adress */
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/* If the above mapping function is only called once, then we can store */
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/* the virtual adress and use it here.... */
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par.addr = (ULONG)base;
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par.size = 0xffffffff; /* This is the virtual address parameter. Set this to ignore */
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plen = sizeof(par);
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if (mapdev != -1)
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{
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DosDevIOCtl(mapdev, (ULONG)0x76, (ULONG)0x46,
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(PVOID)&par, (ULONG)plen, (PULONG)&plen,
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&vmaddr, sizeof(ULONG), &plen);
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callcount--;
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}
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/* Now if more than one region has been allocated and we close the driver,
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* the other pointers will immediately become invalid. We avoid closing
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* driver for now, but this should be fixed for server exit
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*/
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if(!callcount) close_mmap();
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}
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