epia-m support

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1655 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 42 insertions, 0 deletions

diff --git a/util/resetcf/resetcf.c b/util/resetcf/resetcf.c
new file mode 100644
index 0000000000..1977f7dbcb
--- /dev/null
+++ b/util/resetcf/resetcf.c
@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <fcntl.h>
+
+#include <unistd.h>
+#include <sys/mman.h>
+
+main(int argc, char *argv[])
+{
+  int i;
+  volatile unsigned char *cp;
+  int fd;
+  void *v;
+  off_t nvram;
+  size_t length = 0x1000;
+
+  fd = open("/proc/bus/pci/00/0a.1",O_RDONLY);
+  lseek(fd,0x10,0);
+  read(fd,&nvram,sizeof(nvram));
+  close(fd);
+  //printf("Star %x\n",nvram);
+
+  if((fd = open("/dev/mem",O_RDWR)) != -1)
+    {
+      v = mmap(0, length, PROT_READ | PROT_WRITE, MAP_SHARED,fd,nvram);
+      fprintf(stderr, "mmap returns %p\n", v);
+      
+      if ( v == (void *) -1)
+	{
+	  perror("mmap");
+	  exit(1);
+	}
+    } else {
+      perror("open /dev/mem");
+      exit(1);
+    }
+  
+    for( i = 0x836 ; i < 0x840 ; i++){
+	*(unsigned char *)(v+i) = 0;
+    }
+   
+  
+}