erebion/coreboot
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

vpd: retrieve mac addresses and pass them to bootloader

Browse source 
Chrome OS devices firmware usually includes an area called VPD (Vital
Product Data). VPD is a blob of a certain structure, in particular
containing freely defined variable size fields. A field is a tuple of
the field name and field contents.

MAC addresses of the interfaces are stored in VPD as well. Field names
are in the form of 'ethernet_macN', where N is the zero based
interface number.

This patch retrieves the MAC address(es) from the VPD and populates
them in the coreboot table so that they become available to the
bootloader.

BUG=chrome-os-partner:32152, chromium:417117
TEST=with this and other patches in place the storm device tree shows
     up with MAC addresses properly initialized.

Change-Id: I12c0d15ca84f60e4824e1056c9be2e81a7ad8e73
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/219443
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Vadim Bendebury 2014-09-22 18:48:41 -07:00 • committed by chrome-internal-fetch
commit 1972b9e97b
2 changed files with 87 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/include/boot/coreboot_tables.h
View file

@ -256,6 +256,19 @@ struct lb_board_id {
uint32_t board_id;
};
#define LB_TAG_MAC_ADDRS 0x0026
struct mac_address {
uint8_t mac_addr[6];
uint8_t pad[2]; /* Pad it to 8 bytes to keep it simple. */
};
struct lb_macs {
uint32_t tag;
uint32_t size;
uint32_t count;
struct mac_address mac_addrs[0];
};
/* The following structures are for the cmos definitions table */
#define LB_TAG_CMOS_OPTION_TABLE 200
/* cmos header record */