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/*
* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/*
* This is the flash map (fmap) for a twostop firmware. It defines all the areas
* that Chrome OS expects to find in its firmware device. The device is split
* into a number of top-level sections, and within each are several areas.
*
* Available flags for each entry are: read-only, compresed.
* All sections will be marked static in the fmap.
*/
/include/ "flashmap-ro.dtsi"
/*
* TODO: Although we can squeeze R/O and R/W blobs into 2 MB, we do not do
* so because:
*
* - (A minor reason) Not every 4 MB flash chip can write-protect just the
* first 1 MB.
*
* - (The main reason) We do not know how many tools or scripts implicitly
* assume that R/O section consumes the first half 2 MB.
*
* In the long run, we should find and fix all those tools and scripts that
* have incorrect implicit assumption of R/O section, but for now, we just
* cannot squeeze the image size down to 2 MB at the risk of wrongly write-
* protecting the R/W blobs.
*/
/ {
flash@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "winbond,W25Q32BVSSIG", "cfi-flash",
"chromeos,flashmap";
reg = <0x00000000 0x00400000>;
/* ---- Section: Rewritable slot A ---- */
rw-a@200000 {
label = "rw-section-a";
/* Alignment: 4k (for updating) */
reg = <0x00200000 0x00078000>;
};
rw-a-vblock@200000 {
label = "vblock-a";
/* Alignment: 4k (for updating) and must be in start of
* each RW_SECTION. */
reg = <0x00200000 0x00002000>;
type = "keyblock boot";
keyblock = "dev_firmware.keyblock";
signprivate = "dev_firmware_data_key.vbprivk";
version = <1>;
kernelkey = "kernel_subkey.vbpubk";
preamble-flags = <1>;
};
rw-a-boot@202000 {
/* Alignment: no requirement (yet). */
label = "fw-main-a";
reg = <0x00202000 0x00075000>;
type = "blob boot";
};
rw-a-firmware-id@277f00 {
/* Alignment: no requirement. */
label = "rw-fwid-a";
reg = <0x00277f00 0x00000100>;
read-only;
type = "blobstring fwid";
};
/* ---- Section: Rewritable slot B ---- */
rw-b@278000 {
label = "rw-section-b";
/* Alignment: 4k (for updating) */
reg = <0x00278000 0x00078000>;
};
rw-b-vblock@278000 {
label = "vblock-b";
/* Alignment: 4k (for updating) and must be in start of
* each RW_SECTION. */
reg = <0x00278000 0x00002000>;
type = "keyblock boot";
keyblock = "firmware.keyblock";
signprivate = "firmware_data_key.vbprivk";
version = <1>;
kernelkey = "kernel_subkey.vbpubk";
preamble-flags = <1>;
};
rw-b-boot@27a000 {
label = "fw-main-b";
/* Alignment: no requirement (yet). */
reg = <0x0027a000 0x00075000>;
type = "blob boot";
};
rw-b-firmware-id@2eff00 {
label = "rw-fwid-b";
/* Alignment: no requirement. */
reg = <0x002eff00 0x00000100>;
read-only;
type = "blobstring fwid";
};
/* ---- Section: Rewritable VPD 32 KB ---- */
rw-vpd@2f0000 {
label = "rw-vpd";
/* Alignment: 4k (for updating) */
reg = <0x002f0000 0x00008000>;
type = "wiped";
wipe-value = [ff];
};
/* ---- Section: Rewritable shared 16 KB---- */
shared-section@2f8000 {
/* Alignment: 4k (for updating).
* Anything in this range may be updated in recovery. */
label = "rw-shared";
reg = <0x002f8000 0x00004000>;
};
shared-data@2f8000 {
label = "shared-data";
/* Alignment: 4k (for random read/write).
* RW firmware can put calibration data here. */
reg = <0x002f8000 0x00004000>;
type = "wiped";
wipe-value = [00];
};
/* ---- Section: Rewritable private 16 KB---- */
private-section@2fc000 {
/* Anything in this range will never be updated */
label = "rw-private";
reg = <0x002fc000 0x00004000>;
};
dev-cfg@2fe000 {
label = "dev-cfg";
/* Alignment: 4k, and must occupy bottom of U-Boot
* firmware -- check CONFIG_ENV_OFFSET */
reg = <0x002fe000 0x00002000>;
/*
* We could put the dev environment here, but U-Boot has
* a default built in. Devs can 'saveenv' to set this
* up.
*/
type = "wiped";
wipe-value = [00];
};
};
};
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