MTRR configuring

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4477 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 48 insertions, 0 deletions

diff --git a/libdha/mtrr.c b/libdha/mtrr.c
new file mode 100644
index 0000000000..4373b0f808
--- /dev/null
+++ b/libdha/mtrr.c
@@ -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
\ No newline at end of file