Set the serial number environment variable based on the value in VPD.
Signed-off-by: Stephen Boyd <swb...@chromium.org>
---
lib/coreboot/cb_sysinfo.c | 62 +++++++++++++++++++++++++++++++++++++++
1 file changed, 62 insertions(+)
diff --git a/lib/coreboot/cb_sysinfo.c b/lib/coreboot/cb_sysinfo.c
index d2e5e6d9bb6e..92e4f9ca0c0c 100644
--- a/lib/coreboot/cb_sysinfo.c
+++ b/lib/coreboot/cb_sysinfo.c
@@ -674,3 +674,65 @@ unsigned int vpd_cbmem_parse_key_value(const u8 *blob,
unsigned int offset,
return vpd_cbmem_parse_len(blob, offset, val_offset, val_len);
}
+
+static unsigned int coreboot_set_one(const u8 *blob, unsigned int i)
+{
+ unsigned int vpd_type = blob[i++];
+ unsigned int key_offset;
+ unsigned int key_len;
+ unsigned int val_offset;
+ unsigned int val_len;
+ const u8 *key;
+ const u8 *val;
+
+ if (vpd_type != VPD_TYPE_INFO && vpd_type != VPD_TYPE_STRING)
+ return i;
+
+ i = vpd_cbmem_parse_key_value(blob, i, &key_offset, &key_len,
&val_offset, &val_len);
+ if (vpd_type != VPD_TYPE_STRING)
+ return i;
+
+ key = blob + key_offset;
+ val = blob + val_offset;
+
+ if (!strncmp(key, "serial_number", key_len)) {
+ unsigned char serialno[64];
+
+ if (val_len > ARRAY_SIZE(serialno))
+ val_len = ARRAY_SIZE(serialno);
+
+ strncpy(serialno, val, val_len);
+ env_set("serial#", serialno);
+ }
+
+ return i;
+}
+
+/*
+ * Set environment variables based on the contents of VPD.
+ */
+static int coreboot_settings_r(void)
+{
+ const struct sysinfo_t *sysinfo;
+ const struct vpd_cbmem *vpd;
+ unsigned int i = 0;
+ unsigned int len;
+ const u8 *blob;
+
+ sysinfo = cb_get_sysinfo();
+ if (!sysinfo)
+ return 0;
+
+ vpd = sysinfo->chromeos_vpd;
+ if (!vpd)
+ return 0;
+
+ len = vpd->ro_size;
+ blob = vpd->blob;
+
+ while (i < len)
+ i = coreboot_set_one(blob, i);
+
+ return 0;
+}
+EVENT_SPY_SIMPLE(EVT_SETTINGS_R, coreboot_settings_r);
--
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