From 274ef4186ff7120309ac89343e35ba57608d0f4d Mon Sep 17 00:00:00 2001 From: Vadim Bendebury Date: Mon, 22 Sep 2014 18:48:41 -0700 Subject: vpd: retrieve mac addresses and pass them to bootloader 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: I955207b3a644cde100cc4b48e51a2ab9a3cb1ba0 Signed-off-by: Stefan Reinauer Original-Commit-Id: 1972b9e97b57cc8503c5e4dc496706970ed2ffbe Original-Change-Id: I12c0d15ca84f60e4824e1056c9be2e81a7ad8e73 Original-Signed-off-by: Vadim Bendebury Original-Reviewed-on: https://chromium-review.googlesource.com/219443 Original-Reviewed-by: Aaron Durbin Reviewed-on: http://review.coreboot.org/9207 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi --- src/include/boot/coreboot_tables.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'src/include/boot') diff --git a/src/include/boot/coreboot_tables.h b/src/include/boot/coreboot_tables.h index 46c1df5e49..0efb8fdb41 100644 --- a/src/include/boot/coreboot_tables.h +++ b/src/include/boot/coreboot_tables.h @@ -263,6 +263,19 @@ 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 */ -- cgit v1.2.3