blob: ae2a17b469b48b621ad3348b6f5a54cb8f885456 [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2019 9elements Agency GmbH <patrick.rudolph@9elements.com>
*
* 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.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <errno.h>
#include <stdarg.h>
/* Place the following struct somewhere in the ROM: */
struct SMC_BIOS_Update {
uint8_t magic0[4]; // always 0xaa00b1ed
char magic1[4]; // always $FID
uint8_t magic2[2]; // always 0x7804
uint8_t space0; // always zero
// SMCinfotool doesn't care for the first letter
// The BMC webinterface does.
char boardid[9]; // "100000000"
uint8_t space1[15]; // unknown data
uint8_t space2; // always 0x1f
char ukn_majorVer[2];// unknown
uint8_t space3; // always zero
char ukn_minorVer[2];// unknown
uint8_t space4; // always zero
char majorVer[3]; // BIOS major version
char minorVer[2]; // BIOS minor version
uint8_t space5; // always zero
uint16_t year; // year
uint8_t month; // month
uint8_t day; // day
uint32_t space6; // unknown data
uint8_t space7; // all ones
char str[15]; // "SUPERMSMCI--MB1"
uint8_t space8[3]; // always zero
uint64_t space9[6]; // all ones
} __packed;
static const char *optstring = "b:i:o:h";
static struct option long_options[] = {
{"boardid", required_argument, 0, 'b' },
{"input", required_argument, 0, 'i' },
{"output", required_argument, 0, 'o' },
{"help", no_argument, 0, 'h' },
};
static void usage(void)
{
printf("smcbiosinfo: Create BIOSInfo for BMC BIOS updates\n");
printf("Usage: smcbiosinfo [options] -i build.h -b <boardid> -o <filename>\n");
printf("-b | --boardid <ID> The board ID assigned by SMC\n");
printf("-i | --input <FILE> The build.h file to parse\n");
printf("-o | --output <FILE> The file to generate\n");
printf("-h | --help Print this help\n");
}
static int bcd2int(int hex)
{
if (hex > 0xff)
return -1;
return ((hex & 0xF0) >> 4) * 10 + (hex & 0x0F);
}
static char *get_line(char *fn, char *match)
{
ssize_t read;
char *line = NULL;
char *ret = NULL;
size_t len = 0;
FILE *fp = fopen(fn, "r");
if (fp == NULL) {
fprintf(stderr, "E: Couldn't open file '%s'\n", fn);
return NULL;
}
while ((read = getline(&line, &len, fp)) != -1) {
if (strstr(line, match) != NULL) {
ret = strdup(strstr(line, match) + strlen(match));
break;
}
}
if (!ret)
fprintf(stderr, "E: %s not found in %s\n", match, fn);
fclose(fp);
return ret;
}
static int get_line_as_int(char *fn, char *match, int bcd)
{
int ret = -1;
char *s = get_line(fn, match);
if (s && strlen(s) > 0) {
char *endptr;
ret = strtol(s, &endptr, 0);
if (*endptr != '\0' && *endptr != '\n') {
fprintf(stderr, "E: Couldn't parse number for key '%s'\n", match);
return -1;
}
if (bcd)
ret = bcd2int(ret);
free(s);
} else {
fprintf(stderr, "E: Got invalid line for key '%s'\n", match);
}
return ret;
}
int main(int argc, char **argv)
{
int c;
int ret = 1;
char *filename = NULL;
char *inputfilename = NULL;
char *boardid = NULL;
int num;
while (1) {
int optindex = 0;
c = getopt_long(argc, argv, optstring, long_options, &optindex);
if (c == -1)
break;
switch (c) {
case 'b':
boardid = strdup(optarg);
break;
case 'i':
inputfilename = strdup(optarg);
break;
case 'o':
filename = strdup(optarg);
break;
case 'h':
ret = 0; /* fallthrough */
case '?':
usage();
goto out;
default:
break;
}
}
if (!inputfilename) {
fprintf(stderr, "E: Must specify build.h filename\n");
goto out;
}
if (!filename) {
fprintf(stderr, "E: Must specify a destination filename\n");
goto out;
}
if (!boardid || strlen(boardid) == 0) {
fprintf(stderr, "E: Board ID must be set\n");
goto out;
}
if (strlen(boardid) > 8) {
fprintf(stderr, "E: Board ID must be less than 8 characters\n");
goto out;
}
// generate the table
struct SMC_BIOS_Update sbu = {
{0xed, 0xb1, 0x00, 0xaa},
"$FID",
{0x04, 0x78},
0, // space
"100000000", // boardid
{}, // unknown data
0x1f, // space
"05", // unknown data
0, // zero
"06", // unknown data
0, // zero
"000", // major
"00", // minor
0, // zero
0, // year
0, // month
0, //day
0, // unknown data
0xff, // space
"SUPERMSMCI--MB1",
{0, 0, 0}, // all zero
{~0, ~0, ~0, ~0, ~0, ~0}, // all ones
};
num = get_line_as_int(inputfilename, "COREBOOT_MAJOR_VERSION", 0);
if (num < 0)
goto out;
if (num < 999) {
char tmp[4];
snprintf(tmp, sizeof(tmp), "%03d", num);
memcpy(&sbu.majorVer, &tmp, sizeof(sbu.majorVer));
} else {
fprintf(stderr, "E: Unsupported coreboot major version\n");
goto out;
}
num = get_line_as_int(inputfilename, "COREBOOT_MINOR_VERSION", 0);
if (num < 0)
goto out;
if (num < 99) {
char tmp[3];
snprintf(tmp, sizeof(tmp), "%02d", num);
memcpy(&sbu.minorVer, &tmp, sizeof(sbu.minorVer));
} else {
fprintf(stderr, "E: Unsupported coreboot minor version\n");
goto out;
}
num = get_line_as_int(inputfilename, "COREBOOT_BUILD_YEAR_BCD", 1);
if (num < 0)
goto out;
sbu.year = 2000 + num;
num = get_line_as_int(inputfilename, "COREBOOT_BUILD_MONTH_BCD", 1);
if (num < 0)
goto out;
sbu.month = num;
num = get_line_as_int(inputfilename, "COREBOOT_BUILD_DAY_BCD", 1);
if (num < 0)
goto out;
sbu.day = num;
memcpy(&sbu.boardid[1], boardid, strlen(boardid));
// write the table
FILE *fd = fopen(filename, "wb");
if (!fd) {
fprintf(stderr, "E: %s open failed: %s\n", filename, strerror(errno));
goto out;
}
if (fwrite(&sbu, 1, sizeof(sbu), fd) != sizeof(sbu)) {
fprintf(stderr, "E: %s write failed: %s\n", filename, strerror(errno));
fclose(fd);
goto out;
}
if (fclose(fd)) {
fprintf(stderr, "E: %s close failed: %s\n", filename, strerror(errno));
goto out;
}
ret = 0;
out:
if (ret > 0)
fprintf(stderr, "E: Error creating '%s'\n", filename);
free(filename);
exit(ret);
return 0;
}