mirror of https://github.com/mpv-player/mpv
195 lines
3.6 KiB
C
195 lines
3.6 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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#ifdef ARCH_ALPHA
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#include <sys/io.h>
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#endif
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#include <unistd.h>
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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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#if defined(__OpenBSD__)
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#define DEV_APERTURE "/dev/xf86"
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#endif
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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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#include "kernelhelper/dhahelper.h"
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#endif
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#ifdef CONFIG_SVGAHELPER
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#include <svgalib_helper.h>
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#endif
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static int mem_fd = -1;
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void *map_phys_mem(unsigned long base, unsigned long size)
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{
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#ifdef ARCH_ALPHA
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/* TODO: move it into sysdep */
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base += bus_base();
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#endif
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#ifdef CONFIG_SVGAHELPER
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if ( (mem_fd = open(DEV_SVGA,O_RDWR)) == -1) {
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perror("libdha: SVGAlib kernelhelper failed");
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#ifdef CONFIG_DHAHELPER
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goto dha_helper_way;
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#else
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goto dev_mem_way;
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#endif
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}
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else
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goto mmap;
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#endif
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#ifdef CONFIG_DHAHELPER
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#ifdef CONFIG_SVGAHELPER
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dha_helper_way:
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#endif
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if ( (mem_fd = open("/dev/dhahelper",O_RDWR)) < 0)
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{
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perror("libdha: DHA kernelhelper failed");
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goto dev_mem_way;
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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_fd, DHAHELPER_MEMORY, &mem_req) < 0)
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{
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perror("libdha: DHA kernelhelper failed");
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close(mem_fd);
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goto dev_mem_way;
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}
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else
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goto mmap;
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}
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#endif
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dev_mem_way:
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#ifdef DEV_APERTURE
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if ((mem_fd = open(DEV_APERTURE, O_RDWR)) == -1)
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perror("libdha: opening aperture failed");
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else {
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void *p = mmap(0,size,PROT_READ|PROT_WRITE,MAP_SHARED,mem_fd,base);
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if (p == MAP_FAILED) {
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perror("libdha: mapping aperture failed");
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close(mem_fd);
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} else
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return p;
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}
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#endif
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if ( (mem_fd = open(DEV_MEM,O_RDWR)) == -1)
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{
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perror("libdha: opening /dev/mem failed");
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return MAP_FAILED;
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}
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mmap:
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return mmap(0,size,PROT_READ|PROT_WRITE,MAP_SHARED,mem_fd,base);
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}
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void unmap_phys_mem(void *ptr, unsigned long size)
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{
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int res = munmap(ptr,size);
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if (res == (int)MAP_FAILED)
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{
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perror("libdha: unmapping memory failed");
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return;
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}
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close(mem_fd);
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mem_fd = -1;
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return;
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}
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#endif /* Generic mmap (not win32, nor os2) */
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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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