Function find_fmap_directory

src/lib/fmap.c:111–149

}

static int find_fmap_directory(struct region_device *fmrd)
{
	const struct region_device *boot;
	struct fmap *fmap;
	size_t offset = FMAP_OFFSET;

	/* Try FMAP cache first */
	if (!region_device_sz(&fmap_cache))
		setup_preram_cache(&fmap_cache);
	if (region_device_sz(&fmap_cache))
		return rdev_chain_full(fmrd, &fmap_cache);

	/* Cache setup in pre-RAM stages can't fail, unless flash I/O in general failed. */
	if (!CONFIG(NO_FMAP_CACHE) && ENV_ROMSTAGE_OR_BEFORE)
		return -1;

	boot_device_init();
	boot = boot_device_ro();

	if (boot == NULL)
		return -1;

	fmap = rdev_mmap(boot, offset,
			 CONFIG(CBFS_VERIFICATION) ? FMAP_SIZE : sizeof(struct fmap));

	if (fmap == NULL)
		return -1;

	if (verify_fmap(fmap)) {
		rdev_munmap(boot, fmap);
		return -1;
	}

	report(fmap);

	rdev_munmap(boot, fmap);

	return rdev_chain(fmrd, boot, offset, FMAP_SIZE);
}

int fmap_locate_area_as_rdev(const char *name, struct region_device *area)
{