/* This file is part of the coreboot project. */ /* SPDX-License-Identifier: GPL-2.0-only */ #include #include #include #include #include #include #include #include #include #include /* 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 -o \n"); printf("-b | --boardid The board ID assigned by SMC\n"); printf("-i | --input The build.h file to parse\n"); printf("-o | --output 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; }