Flashrom update from Stefan, resolve issue 21
Corresponding to flashrom svn r34 and coreboot v2 svn r2111.
diff --git a/layout.c b/layout.c
new file mode 100644
index 0000000..2219096
--- /dev/null
+++ b/layout.c
@@ -0,0 +1,170 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include "layout.h"
+#include "lbtable.h"
+#include "debug.h"
+
+char * mainboard_vendor=NULL;
+char * mainboard_part=NULL;
+int romimages=0;
+
+extern int force;
+
+#define MAX_ROMLAYOUT 16
+
+typedef struct {
+ unsigned int start;
+ unsigned int end;
+ unsigned int included;
+ char name[256];
+} romlayout_t;
+
+romlayout_t rom_entries[MAX_ROMLAYOUT];
+
+static char *def_name = "DEFAULT";
+
+
+int show_id(uint8_t *bios, int size)
+{
+ unsigned int *walk;
+
+
+ walk=(unsigned int *)(bios+size-0x10);
+ walk--;
+
+ if((*walk)==0 || ((*walk)&0x3ff) != 0) {
+ /* We might have an Nvidia chipset bios
+ * which stores the id information at a
+ * different location.
+ */
+ walk=(unsigned int *)(bios+size-0x80);
+ walk--;
+ }
+
+ if((*walk)==0 || ((*walk)&0x3ff) != 0) {
+ printf("Flash image seems to be a legacy BIOS. Disabling checks.\n");
+ mainboard_vendor=def_name;
+ mainboard_part=def_name;
+ return 0;
+ }
+
+ printf("LinuxBIOS image size=%d\n", *walk);
+
+ walk--; mainboard_part=strdup((const char *)(bios+size-*walk));
+ walk--; mainboard_vendor=strdup((const char *)(bios+size-*walk));
+ printf("MANUFACTURER: %s\n", mainboard_vendor);
+ printf("MAINBOARD ID: %s\n", mainboard_part);
+ if(lb_vendor && !strcmp(mainboard_vendor, lb_vendor) &&
+ lb_part && !strcmp(mainboard_part, lb_part)) {
+ printf ("This firmware image matches "
+ "this motherboard.\n");
+ } else {
+ if(force) {
+ printf("WARNING: This firmware image does not "
+ "fit to this machine - forcing it.\n");
+ } else {
+ printf("ERROR: This firmware image does not "
+ "fit to this machine\nOverride with -m if"
+ "you know exactly what you are doing.\n");
+ exit(1);
+ }
+ }
+
+ return 0;
+}
+
+int read_romlayout(char *name)
+{
+ FILE *romlayout;
+ char tempstr[256];
+ int i;
+
+ romlayout=fopen (name, "r");
+
+ if(!romlayout) {
+ printf("Error while opening rom layout.\n");
+ return -1;
+ }
+
+ while(!feof(romlayout)) {
+ char *tstr1, *tstr2;
+ fscanf(romlayout,"%s %s\n", tempstr, rom_entries[romimages].name);
+#if 0
+ // fscanf does not like arbitrary comments like that :( later
+ if (tempstr[0]=='#') {
+ continue;
+ }
+#endif
+ tstr1=strtok(tempstr,":");
+ tstr2=strtok(NULL,":");
+ rom_entries[romimages].start=strtol(tstr1, (char **)NULL, 16);
+ rom_entries[romimages].end=strtol(tstr2, (char **)NULL, 16);
+ rom_entries[romimages].included=0;
+ romimages++;
+ }
+
+ for(i=0; i<romimages; i++) {
+ printf("romlayout %08x - %08x named %s\n",
+ rom_entries[i].start,
+ rom_entries[i].end,
+ rom_entries[i].name);
+ }
+
+ fclose(romlayout);
+ return 0;
+}
+
+int find_romentry(char *name)
+{
+ int i;
+
+ if(!romimages) return -1;
+
+ printf("Looking for \"%s\"... ", name);
+
+ for (i=0; i<romimages; i++) {
+ if(!strcmp(rom_entries[i].name, name)) {
+ rom_entries[i].included=1;
+ printf("found.\n");
+ return i;
+ }
+ }
+ printf("not found.\n");
+ // Not found. Error.
+ return -1;
+}
+
+int handle_romentries(uint8_t *buffer, uint8_t *content)
+{
+ int i;
+
+ // This function does not safe flash write cycles.
+ //
+ // Also it does not cope with overlapping rom layout
+ // sections.
+ // example:
+ // 00000000:00008fff gfxrom
+ // 00009000:0003ffff normal
+ // 00040000:0007ffff fallback
+ // 00000000:0007ffff all
+ //
+ // If you'd specify -i all the included flag of all other
+ // sections is still 0, so no changes will be made to the
+ // flash. Same thing if you specify -i normal -i all only
+ // normal will be updated and the rest will be kept.
+
+
+ for (i=0; i<romimages; i++) {
+
+ if (rom_entries[i].included)
+ continue;
+
+ memcpy (buffer+rom_entries[i].start,
+ content+rom_entries[i].start,
+ rom_entries[i].end-rom_entries[i].start);
+ }
+
+ return 0;
+}