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* cbfstool: Restructure around support for reading/writing portions of filesSol Boucher2015-05-081-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The buffer API that cbfstool uses to read and write files only directly supports one-shot operations on whole files. This adds an intermediate partitioned_file module that sits on top of the buffer system and has an awareness of FMAP entries. It provides an easy way to get a buffer for an individual region of a larger image file based on FMAP section name, as well as incrementally write those smaller buffers back to the backing file at the appropriate offset. The module has two distinct modes of operation: - For new images whose layout is described exclusively by an FMAP section, all the aforementioned functionality will be available. - For images in the current format, where the CBFS master header serves as the root of knowledge of the image's size and layout, the module falls back to a legacy operation mode, where it only allows manipulation of the entire image as one unit, but exposes this support through the same interface by mapping the region named SECTION_NAME_PRIMARY_CBFS ("COREBOOT") to the whole file. The tool is presently only ported onto the new module running in legacy mode: higher-level support for true "partitioned" images will be forthcoming. However, as part of this change, the crusty cbfs_image_from_file() and cbfs_image_write_file() abstractions are removed and replaced with a single cbfs_image function, cbfs_image_from_buffer(), as well as centralized image reading/writing directly in cbfstool's main() function. This reduces the boilerplate required to implement each new action, makes the create action much more similar to the others, and will make implementing additional actions and adding in support for the new format much easier. BUG=chromium:470407 TEST=Build panther and nyan_big coreboot.rom images with and without this patch and diff their hexdumps. Ensure that no differences occur at different locations from the diffs between subsequent builds of an identical source tree. Then flash a full new build onto nyan_big and watch it boot normally. BRANCH=None Change-Id: I25578c7b223bc8434c3074cb0dd8894534f8c500 Signed-off-by: Sol Boucher <solb@chromium.org> Original-Commit-Id: 7e1c96a48e7a27fc6b90289d35e6e169d5e7ad20 Original-Change-Id: Ia4a1a4c48df42b9ec2d6b9471b3a10eb7b24bb39 Original-Signed-off-by: Sol Boucher <solb@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/265581 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/10134 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
* fmaptool: Introduce the fmd ("flashmap descriptor") language and compilerSol Boucher2015-05-081-21/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds a compiler for a language whose textual representation of flashmap regions will be used to describe the layout of flash chips that contain more than just a single CBFS. Direct integration with cbfstool (via a new command-line switch for the create action) is forthcoming but will be added separately. BUG=chromium:461875 TEST=Use Chromium OS's cros_bundle_firmware script on the fmap.dts file for panther. Using the latter file as a reference, write a corresponding fmap.fmd file and feed it through fmaptool. Run both binary output files though the flashmap project's own flashmap_decode utility. Observe only the expected differences. BRANCH=None Change-Id: I06b32d138dbef0a4e5ed43c81bd31c796fd5d669 Signed-off-by: Sol Boucher <solb@chromium.org> Original-Commit-Id: 005ab67eb594e21489cf31036aedaea87e0c7142 Original-Change-Id: Ia08f28688efdbbfc70c255916b8eb7eb0eb07fb2 Original-Signed-off-by: Sol Boucher <solb@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/255031 Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org> Reviewed-on: http://review.coreboot.org/9942 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
* cbfstool: Fix strange flashmap whitespaceSol Boucher2015-05-081-8/+8
| | | | | | | | | | | | This is being fixed in a separate commit so we can diff against the library as it existed in its own repo. Change-Id: Id87cd8f4e015a5ed7dd8a19302cc22ab744fefe8 Signed-off-by: Sol Boucher <solb@chromium.org> Reviewed-on: http://review.coreboot.org/10141 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
* cbfstool: Import minimal set of files from flashmapSol Boucher2015-05-081-0/+192
flashmap was developed in a separate repository until now. Import the files from the 2012 version of the project [1]. [1] https://code.google.com/p/flashmap BUG=chromium:461875 TEST=None BRANCH=None Change-Id: Ida33f81509abc1cf2e532435adbbf31919d96bd8 Signed-off-by: Sol Boucher <solb@chromium.org> Original-Commit-Id: f44e1d1864babe244f07ca49655f0b80b84e890d Original-Change-Id: Ibf191d34df738449c9b9d7ebccca3d7f4150d4d3 Original-Signed-off-by: Sol Boucher <solb@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/254801 Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-on: http://review.coreboot.org/9940 Tested-by: build bot (Jenkins)