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fe660aa372
To create a token by concatenating already-defined macros and new
text, it's necessary to use multiple levels of macro. We'd already
done that in several places in the code such as STM32_CAT; this now
standardizes it into a single place.
BUG=chrome-os-partner:18343
BRANCH=none
TEST=Build all platforms; examine ec.RO.map to see that irq_*_handler and prio_* symbols
evaluated the same as before. (Other macro evaluations would simply fail to compile
if they were incorrect, since the concatenated tokens wouldn't fully expand.)
Change-Id: Ic9bf11d27881a84507fe7b6096dab6217c6c6dc7
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/63231
Reviewed-by: Vincent Palatin <vpalatin@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.