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MTRR configuring

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4477 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
nick 2002-02-02 12:14:56 +00:00
parent 1e88cc71f2
commit 20af0a9f92
3 changed files with 57 additions and 1 deletions
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2
libdha/Makefile
View File

@ -11,7 +11,7 @@ SHORTNAME = libdha.so
endif
LIBNAME = libdha-$(VERSION).so
SRCS=libdha.c pci.c pci_names.c
SRCS=libdha.c mtrr.c pci.c pci_names.c
OBJS=$(SRCS:.c=.o)
CFLAGS = $(OPTFLAGS) -fPIC -I. -I.. -Wall -W

8
libdha/libdha.h
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@ -58,6 +58,14 @@ extern void OUTPORT32(unsigned idx,unsigned val);
extern void * map_phys_mem(unsigned base, unsigned size);
extern void unmap_phys_mem(void *ptr, unsigned size);
/* These are the region types */
#define MTRR_TYPE_UNCACHABLE 0
#define MTRR_TYPE_WRCOMB 1
#define MTRR_TYPE_WRTHROUGH 4
#define MTRR_TYPE_WRPROT 5
#define MTRR_TYPE_WRBACK 6
extern int mtrr_set_type(unsigned base,unsigned size,int type);
#ifdef __cplusplus
}
#endif

48
libdha/mtrr.c Normal file
View File

@ -0,0 +1,48 @@
/*
mtrr.c - Stuff for optimizing memory access
Copyrights:
2002 - Linux version by Nick Kurshev
Licence: GPL
*/
#include "config.h"
#include <stdio.h>
#include <errno.h>
#include "libdha.h"
#include "AsmMacros.h"
#if defined( __i386__ )
int mtrr_set_type(unsigned base,unsigned size,int type)
{
#ifdef linux
FILE * mtrr_fd;
char * stype;
switch(type)
{
case MTRR_TYPE_UNCACHABLE: stype = "uncachable"; break;
case MTRR_TYPE_WRCOMB: stype = "write-combining"; break;
case MTRR_TYPE_WRTHROUGH: stype = "write-through"; break;
case MTRR_TYPE_WRPROT: stype = "write-protect"; break;
case MTRR_TYPE_WRBACK: stype = "write-back"; break;
default: return EINVAL;
}
mtrr_fd = fopen("/proc/mtrr","wt");
if(mtrr_fd)
{
fprintf(mtrr_fd,"base=0x%08X size=0x%08X type=%s\n",base,size,stype);
printf("base=0x%08X size=0x%08X type=%s\n",base,size,stype);
fclose(mtrr_fd);
return 0;
}
return ENOSYS;
#else
#warning Please port MTRR stuff!!!
#endif
}
#else
int mtrr_set_type(unsigned base,unsigned size,int type)
{
}
#endif