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https://github.com/Telecominfraproject/OpenCellular.git
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45cd8463a3
Superseded by EC software sync (hash-based). Sig-based vboot was correctly implemented, but ended up being too slow to be useful given the limited processing power of the EC chips, and we also couldn't come up with a manageable way to handle A/B autoupdate of signed EC firmware. This change and an associated vboot_reference change shrinks the EC binary by ~2KB. BUG=chrome-os-partner:11232 TEST=build link,snow; boot link and check that 'hash' command still works. Change-Id: I3f03ae2d0a4030977826980d6ec5613181e154c2 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/29496 Reviewed-by: Bill Richardson <wfrichar@chromium.org>
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*
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* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include <stddef.h>
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#include "board.h"
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#include "common.h"
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#include "config.h"
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#include "version.h"
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/* FMAP structs. See http://code.google.com/p/flashmap/wiki/FmapSpec */
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#define FMAP_NAMELEN 32
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#define FMAP_SIGNATURE "__FMAP__"
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#define FMAP_SIGNATURE_SIZE 8
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#define FMAP_VER_MAJOR 1
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#define FMAP_VER_MINOR 0
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/*
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* For address containing CONFIG_FLASH_BASE (symbols in *.lds.S and variable),
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* this computes the offset to the start of flash.
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*/
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#define RELATIVE(addr) ((addr) - CONFIG_FLASH_BASE)
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typedef struct _FmapHeader {
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char fmap_signature[FMAP_SIGNATURE_SIZE];
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uint8_t fmap_ver_major;
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uint8_t fmap_ver_minor;
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uint64_t fmap_base;
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uint32_t fmap_size;
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char fmap_name[FMAP_NAMELEN];
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uint16_t fmap_nareas;
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} __packed FmapHeader;
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#define FMAP_AREA_STATIC (1 << 0) /* can be checksummed */
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#define FMAP_AREA_COMPRESSED (1 << 1) /* may be compressed */
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#define FMAP_AREA_RO (1 << 2) /* writes may fail */
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typedef struct _FmapAreaHeader {
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uint32_t area_offset;
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uint32_t area_size;
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char area_name[FMAP_NAMELEN];
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uint16_t area_flags;
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} __packed FmapAreaHeader;
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#define NUM_EC_FMAP_AREAS 7
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const struct _ec_fmap {
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FmapHeader header;
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FmapAreaHeader area[NUM_EC_FMAP_AREAS];
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} ec_fmap __attribute__((section(".google"))) = {
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/* Header */
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{
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.fmap_signature = {'_', '_', 'F', 'M', 'A', 'P', '_', '_'},
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.fmap_ver_major = FMAP_VER_MAJOR,
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.fmap_ver_minor = FMAP_VER_MINOR,
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.fmap_base = CONFIG_FLASH_BASE,
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.fmap_size = CONFIG_FLASH_SIZE,
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.fmap_name = "EC_FMAP",
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.fmap_nareas = NUM_EC_FMAP_AREAS,
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},
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{
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/* RO Firmware */
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{
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/* Range of RO firmware to be updated. Verified in
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* factory finalization by hash. Should not have
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* volatile data (ex, calibration results). */
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.area_name = "EC_RO",
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.area_offset = CONFIG_SECTION_RO_OFF,
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.area_size = CONFIG_SECTION_RO_SIZE,
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.area_flags = FMAP_AREA_STATIC | FMAP_AREA_RO,
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},
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{
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/* (Optional) RO firmware code. */
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.area_name = "FR_MAIN",
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.area_offset = CONFIG_FW_RO_OFF,
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.area_size = CONFIG_FW_RO_SIZE,
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.area_flags = FMAP_AREA_STATIC | FMAP_AREA_RO,
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},
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{
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/* RO firmware version ID. Must be NULL terminated
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* ASCIIZ, and padded with \0. */
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.area_name = "RO_FRID",
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.area_offset = CONFIG_FW_RO_OFF +
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RELATIVE((uint32_t)__version_struct_offset) +
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offsetof(struct version_struct, version),
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.area_size = sizeof(version_data.version),
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.area_flags = FMAP_AREA_STATIC | FMAP_AREA_RO,
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},
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/* Other RO stuff: FMAP, WP, KEYS, etc. */
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{
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.area_name = "FMAP",
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.area_offset = CONFIG_FW_RO_OFF +
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RELATIVE((uint32_t)&ec_fmap),
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.area_size = sizeof(ec_fmap),
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.area_flags = FMAP_AREA_STATIC | FMAP_AREA_RO,
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},
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{
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/* The range for write protection, for factory
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* finalization. Should include (or identical to)
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* EC_RO and aligned to hardware specification. */
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.area_name = "WP_RO",
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.area_offset = CONFIG_SECTION_RO_OFF,
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.area_size = CONFIG_SECTION_RO_SIZE,
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.area_flags = FMAP_AREA_STATIC | FMAP_AREA_RO,
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},
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/* RW Firmware */
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{
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/* The range of RW firmware to be auto-updated. */
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.area_name = "EC_RW",
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.area_offset = CONFIG_SECTION_RW_OFF,
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.area_size = CONFIG_SECTION_RW_SIZE,
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.area_flags = FMAP_AREA_STATIC | FMAP_AREA_RO,
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},
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{
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/* RW firmware version ID. Must be NULL terminated
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* ASCIIZ, and padded with \0. */
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.area_name = "RW_FWID",
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.area_offset = CONFIG_FW_RW_OFF +
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RELATIVE((uint32_t)__version_struct_offset) +
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offsetof(struct version_struct, version),
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.area_size = sizeof(version_data.version),
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.area_flags = FMAP_AREA_STATIC,
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},
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}
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};
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