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/* SPDX-License-Identifier: GPL-2.0-only */
#include <smbios.h>
#include <string.h>
#include <cbfs.h>
#define MAX_SERIAL_LENGTH 0x100
const char *smbios_mainboard_serial_number(void)
{
static char serial_number[MAX_SERIAL_LENGTH + 1] = {0};
struct cbfsf file;
if (serial_number[0] != 0)
return serial_number;
if (cbfs_boot_locate(&file, "serial_number", NULL) == 0) {
struct region_device cbfs_region;
size_t ser_len;
cbfs_file_data(&cbfs_region, &file);
ser_len = region_device_sz(&cbfs_region);
if (ser_len <= MAX_SERIAL_LENGTH) {
if (rdev_readat(&cbfs_region, serial_number, 0, ser_len) == ser_len) {
serial_number[ser_len] = 0;
return serial_number;
}
}
}
strncpy(serial_number, CONFIG_MAINBOARD_SERIAL_NUMBER, MAX_SERIAL_LENGTH);
return serial_number;
}
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