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4681e6bc34
This ensures that modules with default priority (or later) get
an accurate response from extpower_is_present().
BUG=chrome-os-partner:27160
BRANCH=ToT
TEST=Add a default priority initializer. Verify it gets the correct
value for extpower_is_present() with and without external power
connected.
static void extpower_init_check(void)
{
CPRINTF("[%T Extpower %s]\n", extpower_is_present() ? "on" : "off");
}
DECLARE_HOOK(HOOK_INIT, extpower_init_check, HOOK_PRIO_DEFAULT);
Change-Id: Ic47c79d3ab4e7b2fdb6ad2354e4f455697cac250
Original-Change-Id: I13edc32b2a4609fad12982fd710fa95f9e81c9c2
Signed-off-by: Dave Parker <dparker@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/191296
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/192137
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.