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This signs the RW firmware (with a non-secret key). The RO firmware will verify the RW firmware and jump to it if it's good. Note that this isn't the final solution, just the beginning. BUG=chrome-os-partner:37071 BRANCH=none TEST=manual Build and install it. You'll see something like this: --- UART initialized after reboot --- [Reset cause: reset-pin hard] [Image: RO, cr50_v1.1.2929-27e1b82-dirty 2015-02-24 14:36:29 wfrichar@wfrichar-glaptop] [0.000444 Verifying RW image...] [0.423742 RW image verified] [0.423946 Jumping to image RW[0.428492 UART initialized after sysjump] [Image: RW, cr50_v1.1.2929-27e1b82-dirty 2015-02-24 14:36:29 wfrichar@wfrichar-glaptop] [0.428931 Inits done] Console is enabled; type HELP for help. > > sysinfo Reset flags: 0x00000c02 (reset-pin sysjump hard) Copy: RW Jumped: yes Flags: unlocked > Change-Id: Icafa554baca135ff1f80cbce4dad5f980e7fc122 Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/253081 Reviewed-by: Randall Spangler <rspangler@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit