Function fmap_add_cbmem_cache

src/lib/fmap.c:299–320

* The main reason to copy the FMAP into CBMEM is to make it available to the * OS on every architecture. As side effect use the CBMEM copy as cache. */

 * OS on every architecture. As side effect use the CBMEM copy as cache.
 */
static void fmap_add_cbmem_cache(void)
{
	struct region_device fmrd;

	if (find_fmap_directory(&fmrd))
		return;

	/* Reloads the FMAP even on ACPI S3 resume */
	const size_t s = region_device_sz(&fmrd);
	struct fmap *fmap = cbmem_add(CBMEM_ID_FMAP, s);
	if (!fmap) {
		printk(BIOS_ERR, "Failed to allocate CBMEM\n");
		return;
	}

	const ssize_t ret = rdev_readat(&fmrd, fmap, 0, s);
	if (ret != s) {
		printk(BIOS_ERR, "Failed to read FMAP into CBMEM\n");
		cbmem_entry_remove(cbmem_entry_find(CBMEM_ID_FMAP));
		return;
	}
}

static void fmap_setup_cbmem_cache(int unused)
{