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2fb228c198
If we do this:
enum foo_v {
FOO_A,
FOO_B,
FOO_COUNT
};
struct foo_t foo[] = {
{...},
{...},
};
BUILD_ASSERT(ARRAY_SIZE(foo) == FOO_COUNT);
Then we can be sure we're at least initialized all the elements of foo,
although there's no particular guarantee that the order is correct.
However, if we use this:
struct foo_t foo[] = {
[FOO_A] = {...},
[FOO_B] = {...},
};
and we accidentally get one wrong:
struct foo_t foo[] = {
[FOO_B] = {...},
[FOO_B] = {...},
};
Then the assertion still passes, but we've only initialized one element.
Don't do that.
BUG=chrome-os-partner:18343
BRANCH=none
TEST=manual
Refactoring only. Build everything. It should still work.
Change-Id: I58f659207990f18c6fb74b1cac2ec1163cdb07ea
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/172115
Reviewed-by: Randall Spangler <rspangler@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.