Add flashmap (fmap) support to Flashrom

Add flashmap (fmap) support to Flashrom

This adds flashmap parsing to Flashrom. If an fmap data structure is found, entries will be added to flashrom's internal rom layout.

BUG=chromium-os:115
TEST=Tested on Alex

Testing methodology is similar to what was used in the -i argument patch (git hash d0ea9e), except now fmap data was present in the original bios image:
- Partial write test (automated script)

- Manual partial reads test by reading 4K chunks from ROM and comparing against original BIOS image file and also inspecting the chip-sized file.

- Ensure final chip-size image is generated properly by omitting :file from one of the -i arguments.

- Full read if no -i options are used when fmap is present

- Entire chip written if no -i option is specified and fmap is present. Same holds true if a layout file is specified by no regions are included. A command like "flashrom -w bios.bin" or "flashrom -l layout.txt -w bios.bin" will consistently write the full image to ROM.

- Specifying a non-existent region caused flashrom to fail (expected result).

TODO: Automate all of the above.

Review URL: http://codereview.chromium.org/6025013
(cherry picked from commit 6d62d75b8b58a1a75a7d98d4aa22022eee546bbe)

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=4721916

[Benson Leung, 2011-03-13 09:28:07]

On 2011/03/13 09:25:35, Nick Sanders wrote:

LGTM.