mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-27 18:25:05 +00:00
fee92f1202
State machines implemented using deferred functions need to be able to
kick off deferred function from a HOOK_INIT handler. But tasks aren't
running in HOOK_INIT, so task_wake() fails.
Instead, hook_call_deferred() should check to see if the hook task has
had a chance to run yet. If it hasn't, then there's no need to wake
it; it'll get run eventually anyway.
BUG=chrome-os-partner:24892
BRANCH=rambi
TEST=Add a call to hook_call_deferred() in a HOOK_INIT handler. It shouldn't
crash, and the deferred function should be called.
Change-Id: I5c8077b636ae030a668a211fd8238549b6bcfa54
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/181953
Reviewed-by: Yung-chieh Lo <yjlou@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.