diff options
| -rw-r--r-- | libdha/Makefile | 2 | ||||
| -rw-r--r-- | libdha/libdha.h | 8 | ||||
| -rw-r--r-- | libdha/mtrr.c | 48 |
3 files changed, 57 insertions, 1 deletions
diff --git a/libdha/Makefile b/libdha/Makefile index a1d45bf2a6..818cf1cac5 100644 --- a/libdha/Makefile +++ b/libdha/Makefile @@ -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 diff --git a/libdha/libdha.h b/libdha/libdha.h index 18c9770ee4..a3dba42a49 100644 --- a/libdha/libdha.h +++ b/libdha/libdha.h @@ -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 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
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