Move cmos.default handling to bootblock

The cmos.default code wasn't actually used so far, due to an oversight
when forward-porting this feature from an old branch.

- Extend walkcbfs' use by factoring out the stage handling into C code.
- New sanitize_cmos() function that looks if CMOS data is invalid and
  cmos.default exists and if so overwrites CMOS with cmos.default data.
- Use sanitize_cmos() in both bootblock implementations.
- Drop the need to reboot after writing CMOS: CMOS wasn't used so far,
  so we can go on without a reboot.
- Remove the restriction that cmos.default only works on CAR boards.
- Always build in cmos.default support on boards that

Signed-off-by: Patrick Georgi <>
Acked-by: Stefan Reinauer <>

git-svn-id: svn:// 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
7 files changed
tree: 82ac7ab90045bc1edc8c8ee477b5bcd54c37ef7a
  1. documentation/
  2. payloads/
  3. src/
  4. util/
  6. Makefile