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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2005-2008 coresystems GmbH
* (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdint.h>
#include "flash.h"
char *mainboard_vendor = NULL;
char *mainboard_part = NULL;
int romimages = 0;
#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, int force)
{
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--;
}
/*
* Check if coreboot last image size is 0 or not a multiple of 1k or
* bigger than the chip or if the pointers to vendor ID or mainboard ID
* are outside the image of if the start of ID strings are nonsensical
* (nonprintable and not \0).
*/
if ((*walk) == 0 || ((*walk) & 0x3ff) != 0 || *walk > size ||
*(walk - 1) > size || *(walk - 2) > size ||
(!isprint((const char *)(bios + size - *(walk - 1))) &&
((const char *)(bios + size - *(walk - 1)))) ||
(!isprint((const char *)(bios + size - *(walk - 2))) &&
((const char *)(bios + size - *(walk - 2))))) {
printf("Flash image seems to be a legacy BIOS. Disabling checks.\n");
mainboard_vendor = def_name;
mainboard_part = def_name;
return 0;
}
printf_debug("coreboot last image size "
"(not ROM size) is %d bytes.\n", *walk);
walk--;
mainboard_part = strdup((const char *)(bios + size - *walk));
walk--;
mainboard_vendor = strdup((const char *)(bios + size - *walk));
printf_debug("Manufacturer: %s\n", mainboard_vendor);
printf_debug("Mainboard ID: %s\n", mainboard_part);
/*
* If lb_vendor is not set, the coreboot table was
* not found. Nor was -mVENDOR:PART specified
*/
if (!lb_vendor || !lb_part) {
printf("Note: If the following flash access fails, "
"you might need to specify -m <vendor>:<mainboard>.\n");
return 0;
}
/* These comparisons are case insensitive to make things
* a little less user^Werror prone.
*/
if (!strcasecmp(mainboard_vendor, lb_vendor) &&
!strcasecmp(mainboard_part, lb_part)) {
printf_debug("This firmware image matches "
"this motherboard.\n");
} else {
if (force) {
printf("WARNING: This firmware image does not "
"seem to fit to this machine - forcing it.\n");
} else {
printf("ERROR: Your firmware image (%s:%s) does not "
"appear to\n be correct for the detected "
"mainboard (%s:%s)\n\nOverride with --force if you "
"are absolutely sure that you\nare using a correct "
"image for this mainboard or override\nthe detected "
"values with --mainboard <vendor>:<mainboard>.\n\n",
mainboard_vendor, mainboard_part, lb_vendor,
lb_part);
exit(1);
}
}
return 0;
}
int read_romlayout(char *name)
{
FILE *romlayout;
char tempstr[256];
int i;
romlayout = fopen(name, "r");
if (!romlayout) {
fprintf(stderr, "ERROR: Could not open ROM layout (%s).\n",
name);
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_debug("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;
}
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