mirror of
https://github.com/linuxboot/heads.git
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79 lines
2.3 KiB
Diff
79 lines
2.3 KiB
Diff
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diff --git a/src/drivers/generic/cbfs-serial/Kconfig b/src/drivers/generic/cbfs-serial/Kconfig
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new file mode 100644
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index 0000000000..209c242dba
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--- /dev/null
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+++ b/src/drivers/generic/cbfs-serial/Kconfig
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@@ -0,0 +1,6 @@
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+config DRIVERS_GENERIC_CBFS_SERIAL
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+ bool "Serial number in CBFS"
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+ default n
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+ help
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+ Enable this option to read the board serial number from a
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+ text file located in CBFS.
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diff --git a/src/drivers/generic/cbfs-serial/Makefile.inc b/src/drivers/generic/cbfs-serial/Makefile.inc
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new file mode 100644
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index 0000000000..163d439ba9
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--- /dev/null
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+++ b/src/drivers/generic/cbfs-serial/Makefile.inc
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@@ -0,0 +1 @@
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+ramstage-$(CONFIG_DRIVERS_GENERIC_CBFS_SERIAL) += cbfs-serial.c
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diff --git a/src/drivers/generic/cbfs-serial/cbfs-serial.c b/src/drivers/generic/cbfs-serial/cbfs-serial.c
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new file mode 100644
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index 0000000000..ee3e36620c
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--- /dev/null
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+++ b/src/drivers/generic/cbfs-serial/cbfs-serial.c
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@@ -0,0 +1,50 @@
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+/*
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+ * This file is part of the coreboot project.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; version 2 of the License.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+
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+#include <cbfs.h>
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+#include <device/device.h>
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+#include <smbios.h>
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+#include <string.h>
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+
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+
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+#define MAX_SERIAL_LENGTH 0x100
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+
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+const char *smbios_mainboard_serial_number(void)
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+{
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+ static char serial_number[MAX_SERIAL_LENGTH + 1] = {0};
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+ struct cbfsf file;
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+
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+ if (serial_number[0] != 0)
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+ return serial_number;
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+
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+ if (cbfs_boot_locate(&file, "serial_number", NULL) == 0) {
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+ struct region_device cbfs_region;
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+ size_t serial_len;
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+
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+ cbfs_file_data(&cbfs_region, &file);
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+
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+ serial_len = region_device_sz(&cbfs_region);
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+ if (serial_len <= MAX_SERIAL_LENGTH) {
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+ if (rdev_readat(&cbfs_region, serial_number, 0,
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+ serial_len) == serial_len) {
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+ serial_number[serial_len] = 0;
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+ return serial_number;
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+ }
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+ }
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+ }
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+
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+ strncpy(serial_number, CONFIG_MAINBOARD_SERIAL_NUMBER,
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+ MAX_SERIAL_LENGTH);
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+
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+ return serial_number;
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+}
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--
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2.20.1
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