mirror of https://github.com/mpv-player/mpv
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/*
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mtrr.c - Stuff for optimizing memory access
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Copyrights:
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2002 - Linux version by Nick Kurshev
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Licence: GPL
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*/
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include "libdha.h"
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#include "AsmMacros.h"
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#if defined (__i386__) && defined (__NetBSD__)
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#include <sys/param.h>
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#if __NetBSD_Version__ > 105240000
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#include <stdint.h>
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#include <stdlib.h>
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#include <machine/mtrr.h>
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#include <machine/sysarch.h>
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#endif
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#endif
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#if defined( __i386__ )
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int mtrr_set_type(unsigned base,unsigned size,int type)
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{
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#ifdef linux
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FILE * mtrr_fd;
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char * stype;
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switch(type)
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{
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case MTRR_TYPE_UNCACHABLE: stype = "uncachable"; break;
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case MTRR_TYPE_WRCOMB: stype = "write-combining"; break;
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case MTRR_TYPE_WRTHROUGH: stype = "write-through"; break;
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case MTRR_TYPE_WRPROT: stype = "write-protect"; break;
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case MTRR_TYPE_WRBACK: stype = "write-back"; break;
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default: return EINVAL;
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}
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mtrr_fd = fopen("/proc/mtrr","wt");
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if(mtrr_fd)
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{
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char sout[256];
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unsigned wr_len;
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sprintf(sout,"base=0x%08X size=0x%08X type=%s\n",base,size,stype);
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wr_len = fprintf(mtrr_fd,sout);
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/*printf("MTRR: %s\n",sout);*/
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fclose(mtrr_fd);
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return wr_len == strlen(sout) ? 0 : EPERM;
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}
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return ENOSYS;
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#elif defined (__NetBSD__)
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#if __NetBSD_Version__ > 105240000
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struct mtrr *mtrrp;
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int n;
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mtrrp = malloc(sizeof (struct mtrr));
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mtrrp->base = base;
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mtrrp->len = size;
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mtrrp->type = type;
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mtrrp->flags = MTRR_VALID | MTRR_PRIVATE;
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n = 1;
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if (i386_set_mtrr(mtrrp, &n) < 0) {
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free(mtrrp);
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return errno;
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}
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free(mtrrp);
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return 0;
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#else
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/* NetBSD prior to 1.5Y doesn't have MTRR support */
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return ENOSYS;
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#endif
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#else
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#warning Please port MTRR stuff!!!
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return ENOSYS;
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#endif
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}
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#else
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int mtrr_set_type(unsigned base,unsigned size,int type)
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{
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return ENOSYS;
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}
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#endif
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