diff options
Diffstat (limited to 'contrib/libdha/sysdep/libdha_os2.c')
| -rw-r--r-- | contrib/libdha/sysdep/libdha_os2.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/contrib/libdha/sysdep/libdha_os2.c b/contrib/libdha/sysdep/libdha_os2.c new file mode 100644 index 000000000..041f6be71 --- /dev/null +++ b/contrib/libdha/sysdep/libdha_os2.c @@ -0,0 +1,161 @@ +/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/os2/os2_video.c,v 3.14 2000/10/28 01:42:28 mvojkovi Exp $ */ +/* Modified for libdha by Nick Kurshev. */ +/* + * (c) Copyright 1994,1999 by Holger Veit + * <Holger.Veit@gmd.de> + * Modified 1996 by Sebastien Marineau <marineau@genie.uottawa.ca> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * HOLGER VEIT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF + * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Except as contained in this notice, the name of Holger Veit shall not be + * used in advertising or otherwise to promote the sale, use or other dealings + * in this Software without prior written authorization from Holger Veit. + * + */ +/* $XConsortium: os2_video.c /main/8 1996/10/27 11:49:02 kaleb $ */ + +#define INCL_DOSFILEMGR +#include "os2.h" + +/***************************************************************************/ +/* Video Memory Mapping helper functions */ +/***************************************************************************/ + +/* This section uses the xf86sup.sys driver developed for xfree86. + * The driver allows mapping of physical memory + * You must install it with a line DEVICE=path\xf86sup.sys in config.sys. + */ + +static HFILE mapdev = -1; +static ULONG stored_virt_addr; +static char* mappath = "\\DEV\\PMAP$"; +static HFILE open_mmap() +{ + APIRET rc; + ULONG action; + + if (mapdev != -1) + return mapdev; + + rc = DosOpen((PSZ)mappath, (PHFILE)&mapdev, (PULONG)&action, + (ULONG)0, FILE_SYSTEM, FILE_OPEN, + OPEN_SHARE_DENYNONE|OPEN_FLAGS_NOINHERIT|OPEN_ACCESS_READONLY, + (ULONG)0); + if (rc!=0) + mapdev = -1; + return mapdev; +} + +static void close_mmap() +{ + if (mapdev != -1) + DosClose(mapdev); + mapdev = -1; +} + +/* this structure is used as a parameter packet for the direct access + * ioctl of pmap$ + */ + +/* Changed here for structure of driver PMAP$ */ + +typedef struct{ + ULONG addr; + ULONG size; +} DIOParPkt; + +/* This is the data packet for the mapping function */ + +typedef struct { + ULONG addr; + USHORT sel; +} DIODtaPkt; + +/***************************************************************************/ +/* Video Memory Mapping section */ +/***************************************************************************/ + +static long callcount = 0L; + +/* ARGSUSED */ +void * map_phys_mem(unsigned long base, unsigned long size) +{ + DIOParPkt par; + ULONG plen; + DIODtaPkt dta; + ULONG dlen; + static BOOL ErrRedir = FALSE; + APIRET rc; + + par.addr = (ULONG)base; + par.size = (ULONG)size; + plen = sizeof(par); + dlen = sizeof(dta); + + open_mmap(); + if (mapdev == -1) + { + perror("libdha: device xf86sup.sys is not installed"); + exit(1); + } + if ((rc=DosDevIOCtl(mapdev, (ULONG)0x76, (ULONG)0x44, + (PVOID)&par, (ULONG)plen, (PULONG)&plen, + (PVOID)&dta, (ULONG)dlen, (PULONG)&dlen)) == 0) { + if (dlen==sizeof(dta)) { + callcount++; + return (void *)dta.addr; + } + /*else fail*/ + } + return (void *)-1; +} + +/* ARGSUSED */ +void unmap_phys_mem(void * base, unsigned long size) +{ + DIOParPkt par; + ULONG plen,vmaddr; + +/* We need here the VIRTADDR for unmapping, not the physical address */ +/* This should be taken care of either here by keeping track of allocated */ +/* pointers, but this is also already done in the driver... Thus it would */ +/* be a waste to do this tracking twice. Can this be changed when the fn. */ +/* is called? This would require tracking this function in all servers, */ +/* and changing it appropriately to call this with the virtual adress */ +/* If the above mapping function is only called once, then we can store */ +/* the virtual adress and use it here.... */ + + par.addr = (ULONG)base; + par.size = 0xffffffff; /* This is the virtual address parameter. Set this to ignore */ + plen = sizeof(par); + + if (mapdev != -1) + { + DosDevIOCtl(mapdev, (ULONG)0x76, (ULONG)0x46, + (PVOID)&par, (ULONG)plen, (PULONG)&plen, + &vmaddr, sizeof(ULONG), &plen); + callcount--; + } +/* Now if more than one region has been allocated and we close the driver, + * the other pointers will immediately become invalid. We avoid closing + * driver for now, but this should be fixed for server exit + */ + + if(!callcount) close_mmap(); +} |