mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-27 18:25:05 +00:00
abe490b5cb
BUG=chrome-os-partner:24956 BRANCH=ToT TEST=Using evtest, verify off-keyboard buttons now send repeat codes while held down. Verify power button does not send repeat codes. Verify keyboard keys still send repeat codes as before. Original-Change-Id: I873548181cdfa40d8e8929a6538c0ecd5ed8e92c Signed-off-by: Dave Parker <dparker@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/187938 Reviewed-by: Randall Spangler <rspangler@chromium.org> Conflicts: common/keyboard_8042.c Change-Id: Ie7c7a1064cf45083f4707580f4ffc4d364035df9 Reviewed-on: https://chromium-review.googlesource.com/191312 Reviewed-by: Randall Spangler <rspangler@chromium.org> Commit-Queue: Dave Parker <dparker@chromium.org> Tested-by: Dave Parker <dparker@chromium.org>
In the most general case, the flash layout looks something like this: +---------------------+ | Reserved for EC use | +---------------------+ +---------------------+ | Vblock B | +---------------------+ | RW firmware B | +---------------------+ +---------------------+ | Vblock A | +---------------------+ | RW firmware A | +---------------------+ +---------------------+ | FMAP | +---------------------+ | Public root key | +---------------------+ | Read-only firmware | +---------------------+ BIOS firmware (and kernel) put the vblock info at the start of each image where it's easy to find. The Blizzard EC expects the firmware vector table to come first, so we have to put the vblock at the end. This means we have to know where to look for it, but that's built into the FMAP and the RO firmware anyway, so that's not an issue. The RO firmware doesn't need a vblock of course, but it does need some reserved space for vboot-related things. Using SHA256/RSA4096, the vblock is 2468 bytes (0x9a4), while the public root key is 1064 bytes (0x428) and the current FMAP is 644 bytes (0x284). If we reserve 4K at the top of each FW image, that should give us plenty of room for vboot-related stuff.