coreboot-kgpe-d16/util/ifdfake/ifdfake.c

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/*
* ifdfake - Create an Intel Firmware Descriptor with just a section layout
*
* Copyright (C) 2013 secunet Security Networks AG
*
* 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
Remove address from GPLv2 headers As per discussion with lawyers[tm], it's not a good idea to shorten the license header too much - not for legal reasons but because there are tools that look for them, and giving them a standard pattern simplifies things. However, we got confirmation that we don't have to update every file ever added to coreboot whenever the FSF gets a new lease, but can drop the address instead. util/kconfig is excluded because that's imported code that we may want to synchronize every now and then. $ find * -type f -exec sed -i "s:Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *MA[, ]*02110-1301[, ]*USA:Foundation, Inc.:" {} + $ find * -type f -exec sed -i "s:Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA:Foundation, Inc.:" {} + $ find * -type f -exec sed -i "s:Foundation, Inc., 59 Temple Place[-, ]*Suite 330, Boston, MA *02111-1307[, ]*USA:Foundation, Inc.:" {} + $ find * -type f -exec sed -i "s:Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.:Foundation, Inc.:" {} + $ find * -type f -a \! -name \*.patch \ -a \! -name \*_shipped \ -a \! -name LICENSE_GPL \ -a \! -name LGPL.txt \ -a \! -name COPYING \ -a \! -name DISCLAIMER \ -exec sed -i "/Foundation, Inc./ N;s:Foundation, Inc.* USA\.* *:Foundation, Inc. :;s:Foundation, Inc. $:Foundation, Inc.:" {} + Change-Id: Icc968a5a5f3a5df8d32b940f9cdb35350654bef9 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: http://review.coreboot.org/9233 Tested-by: build bot (Jenkins) Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
2015-03-26 15:17:45 +01:00
* Foundation, Inc.
*/
#include <errno.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#define FDBAR_OFFSET 0x10
#define FRBA_OFFSET 0x40
typedef struct {
uint32_t base, limit, size;
} region_t;
static void write_image(const region_t regions[], const char *const image)
{
FILE *const f = fopen(image, "w");
if (!f) {
perror("Could not open file");
exit(EXIT_FAILURE);
}
if (fseek(f, 0x1000 - 1, SEEK_SET)) {
perror("Failed to seek to end of descriptor");
exit(EXIT_FAILURE);
}
char zero = '\0';
if (fwrite(&zero, 1, 1, f) != 1) {
fprintf(stderr, "Failed to write at end of descriptor.\n");
exit(EXIT_FAILURE);
}
if (fseek(f, FDBAR_OFFSET, SEEK_SET)) {
perror("Failed to seek to fdbar");
exit(EXIT_FAILURE);
}
struct {
uint32_t flvalsig;
uint32_t flmap0;
} fdbar;
memset(&fdbar, 0x00, sizeof(fdbar));
fdbar.flvalsig = 0x0ff0a55a;
fdbar.flmap0 = (FRBA_OFFSET >> 4) << 16;
if (fwrite(&fdbar, sizeof(fdbar), 1, f) != 1) {
fprintf(stderr, "Failed to write fdbar.\n");
exit(EXIT_FAILURE);
}
int i;
uint32_t frba[5];
for (i = 0; i < 5; ++i) {
if (regions[i].size)
frba[i] = ((regions[i].limit & 0xfff000) << (16 - 12)) |
((regions[i].base & 0xfff000) >> 12);
else
frba[i] = 0x00000fff;
}
if (fseek(f, FRBA_OFFSET, SEEK_SET)) {
perror("Failed to seek to frba");
exit(EXIT_FAILURE);
}
if (fwrite(frba, sizeof(frba), 1, f) != 1) {
fprintf(stderr, "Failed to write frba.\n");
exit(EXIT_FAILURE);
}
fclose(f);
}
static int parse_region(const char *_arg, region_t *const region)
{
char *const start = strdup(_arg);
int size_spec = 0;
unsigned long first, second;
if (!start) {
fprintf(stderr, "Out of memory.\n");
exit(EXIT_FAILURE);
}
char *colon = strchr(start, ':');
if (!colon) {
colon = strchr(start, '+');
if (!colon) {
free(start);
return -1;
}
size_spec = 1;
}
*colon = '\0';
char *const end = colon + 1;
errno = 0;
first = strtoul(start, NULL, 0);
second = strtoul(end, NULL, 0);
if (size_spec) {
region->base = first;
region->size = second;
region->limit = region->base + region->size - 1;
} else {
region->base = first;
region->limit = second;
region->size = region->limit - region->base + 1;
}
free(start);
if (errno) {
perror("Failed to parse region");
return -1;
} else {
return 0;
}
}
static void print_usage(const char *name)
{
printf("usage: %s [(-b|-m|-g|-p) <start>:<end>]... <output file>\n", name);
printf("\n"
" -b | --bios <start>:<end> BIOS region\n"
" -m | --me <start>:<end> Intel ME region\n"
" -g | --gbe <start>:<end> Gigabit Ethernet region\n"
" -p | --platform <start>:<end> Platform Data region\n"
" -h | --help print this help\n\n"
"<start> and <end> bounds are given in bytes, the <end> bound is inclusive.\n"
"All regions must be multiples of 4K in size and 4K aligned.\n"
"The descriptor region always resides in the first 4K.\n\n"
"An IFD created with ifdfake won't work as a replacement for a real IFD.\n"
"Never try to flash such an IFD to your board!\n\n");
}
int main(int argc, char *argv[])
{
int opt, option_index = 0, idx;
region_t regions[5];
memset(regions, 0x00, sizeof(regions));
static struct option long_options[] = {
{"bios", 1, NULL, 'b'},
{"me", 1, NULL, 'm'},
{"gbe", 1, NULL, 'g'},
{"platform", 1, NULL, 'p'},
{"help", 0, NULL, 'h'},
{0, 0, 0, 0}
};
while ((opt = getopt_long(argc, argv, "b:m:g:p:h?",
long_options, &option_index)) != EOF) {
switch (opt) {
case 'b': case 'm': case 'g': case 'p':
switch (opt) {
case 'b': idx = 1; break;
case 'm': idx = 2; break;
case 'g': idx = 3; break;
case 'p': idx = 4; break;
default: idx = 0; break; /* can't happen */
}
if (parse_region(optarg, &regions[idx])) {
print_usage(argv[0]);
exit(EXIT_FAILURE);
}
break;
case 'h':
case '?':
default:
print_usage(argv[0]);
exit(EXIT_SUCCESS);
break;
}
}
if (optind + 1 != argc) {
fprintf(stderr, "No output file given.\n\n");
print_usage(argv[0]);
exit(EXIT_FAILURE);
}
regions[0].base = 0x00000000;
regions[0].limit = 0x00000fff;
regions[0].size = 0x00001000;
for (idx = 1; idx < 5; ++idx) {
if (regions[idx].size) {
if (regions[idx].base & 0xfff)
fprintf(stderr, "Region %d is "
"not 4K aligned.\n", idx);
else if (regions[idx].size & 0xfff)
fprintf(stderr, "Region %d size is "
"no multiple of 4K.\n", idx);
else if (regions[idx].limit <= regions[idx].base)
fprintf(stderr, "Region %d is empty.\n", idx);
else
continue;
print_usage(argv[0]);
exit(EXIT_FAILURE);
}
}
write_image(regions, argv[optind]);
return 0;
}