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e3dce49334
- Use CONFIG_*_MEM when dealing with images in program memory. - Use CONFIG_*_STORAGE when dealing with images on storage. - Use CONFIG_WP when dealing with the entire WP RO region. BUG=chrome-os-partner:39741,chrome-os-partner:23796 TEST=Manual on Cyan with subsequent commit. Verify that FMAP matches actual layout of image. Verify flashrom succeeds flashing + verifying EC image using host command interface. BRANCH=None Change-Id: Iadc02daa89fe3bf07b083ed0f7be2e60702a1867 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/270269
141 lines
3.8 KiB
C
141 lines
3.8 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 "common.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 *.RO.lds.S and
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* variable), this computes the offset to the start of the image on flash.
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*/
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#define RELATIVE_RO(addr) ((addr) - CONFIG_FLASH_BASE - CONFIG_RO_MEM_OFF)
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struct fmap_header {
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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;
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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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struct fmap_area_header {
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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;
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#define NUM_EC_FMAP_AREAS 7
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const struct _ec_fmap {
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struct fmap_header header;
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struct fmap_area_header 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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/*
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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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*/
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.area_name = "EC_RO",
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.area_offset = CONFIG_RO_STORAGE_OFF,
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.area_size = CONFIG_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_RO_STORAGE_OFF,
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.area_size = CONFIG_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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/*
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* RO firmware version ID. Must be NULL terminated
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* ASCII, and padded with \0.
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*/
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.area_name = "RO_FRID",
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.area_offset = CONFIG_RO_STORAGE_OFF +
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RELATIVE_RO((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_RO_STORAGE_OFF +
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RELATIVE_RO((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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/*
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* The range for write protection, for factory
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* finalization. Should include (may be identical to)
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* EC_RO and aligned to hardware specification.
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*/
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.area_name = "WP_RO",
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.area_offset = CONFIG_WP_OFF,
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.area_size = CONFIG_WP_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_RW_STORAGE_OFF,
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.area_size = CONFIG_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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/*
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* RW firmware version ID. Must be NULL terminated
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* ASCII, and padded with \0.
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* TODO: Get the relative offset of
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* __version_struct_offset within our RW image to
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* accomodate image asymmetry.
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*/
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.area_name = "RW_FWID",
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.area_offset = CONFIG_RW_STORAGE_OFF +
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RELATIVE_RO((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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