mirror of https://github.com/mpv-player/mpv
142 lines
2.9 KiB
C
142 lines
2.9 KiB
C
/*
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libgha.c - Library for direct hardware access
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Copyrights:
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1996/10/27 - Robin Cutshaw (robin@xfree86.org)
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XFree86 3.3.3 implementation
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1999 - Øyvind Aabling.
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Modified for GATOS/win/gfxdump.
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2002 - library implementation by Nick Kurshev
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- dhahelper and some changes by Alex Beregszaszi
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supported O/S's: SVR4, UnixWare, SCO, Solaris,
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FreeBSD, NetBSD, 386BSD, BSDI BSD/386,
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Linux, Mach/386, ISC
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DOS (WATCOM 9.5 compiler), Win9x (with mapdev.vxd)
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Licence: GPL
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Original location: www.linuxvideo.org/gatos
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*/
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#include "config.h"
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#include "libdha.h"
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#include "AsmMacros.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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/* instead exit() use libdha_exit, and do the 'mother-application' deinit
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only in this code */
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void libdha_exit(const char *message, int level)
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{
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printf("libdha: FATAL: %s\n", message);
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exit(level); /* FIXME */
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}
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#if defined(_WIN32)
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#include "sysdep/libdha_win32.c"
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#elif defined (__EMX__)
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#include "sysdep/libdha_os2.c"
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#else
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#if defined(SVR4) || defined(SCO325)
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# if !(defined(sun) && defined (i386) && defined (SVR4))
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# define DEV_MEM "/dev/pmem"
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# elif defined(PowerMAX_OS)
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# define DEV_MEM "/dev/iomem"
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# endif
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# ifdef SCO325
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# undef DEV_MEM
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# define DEV_MEM "/dev/mem"
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# endif
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# endif /* SVR4 */
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/* Generic version */
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#include <sys/mman.h>
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#ifndef DEV_MEM
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#define DEV_MEM "/dev/mem"
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#endif
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#ifdef CONFIG_DHAHELPER
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static int mem=-1;
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void *map_phys_mem(unsigned base, unsigned size)
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{
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if ( (mem = open("/dev/dhahelper",O_RDWR)) < 0)
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{
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if ( (mem = open(DEV_MEM,O_RDWR)) == -1) {
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perror("libdha: open(/dev/mem) failed") ; exit(1) ;
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}
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}
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else
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{
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dhahelper_memory_t mem_req;
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mem_req.operation = MEMORY_OP_MAP;
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mem_req.start = base;
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mem_req.offset = 0;
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mem_req.size = size;
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if (ioctl(mem, DHAHELPER_MEMORY, &mem_req) < 0)
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{
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perror("libdha: failed mapping throught kernel helper");
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return NULL;
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}
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}
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return mmap(0,size,PROT_READ|PROT_WRITE,MAP_SHARED,mem,base) ;
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}
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#else
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static int mem=-1;
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void *map_phys_mem(unsigned base, unsigned size)
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{
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if ( (mem = open(DEV_MEM,O_RDWR)) == -1) {
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perror("libdha: open(/dev/mem) failed") ; exit(1) ;
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}
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return mmap(0,size,PROT_READ|PROT_WRITE,MAP_SHARED,mem,base) ;
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}
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#endif /* CONFIG_DHAHELPER */
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void unmap_phys_mem(void *ptr, unsigned size)
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{
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int res=munmap(ptr,size) ;
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if (res == -1) { perror("libdha: munmap() failed") ; exit(1) ; }
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close(mem);
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}
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#endif
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unsigned char INPORT8(unsigned idx)
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{
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return inb(idx);
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}
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unsigned short INPORT16(unsigned idx)
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{
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return inw(idx);
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}
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unsigned INPORT32(unsigned idx)
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{
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return inl(idx);
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}
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void OUTPORT8(unsigned idx,unsigned char val)
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{
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outb(idx,val);
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}
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void OUTPORT16(unsigned idx,unsigned short val)
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{
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outw(idx,val);
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}
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void OUTPORT32(unsigned idx,unsigned val)
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{
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outl(idx,val);
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}
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