Ejemplo n.º 1
0
int mrccache_update(struct udevice *sf, struct mrc_region *entry,
		    struct mrc_data_container *cur)
{
	struct mrc_data_container *cache;
	ulong offset;
	ulong base_addr;
	int ret;

	if (!is_mrc_cache(cur))
		return -EINVAL;

	/* Find the last used block */
	base_addr = entry->base + entry->offset;
	debug("Updating MRC cache data\n");
	cache = mrccache_find_current(entry);
	if (cache && (cache->data_size == cur->data_size) &&
	    (!memcmp(cache, cur, cache->data_size + sizeof(*cur)))) {
		debug("MRC data in flash is up to date. No update\n");
		return -EEXIST;
	}

	/* Move to the next block, which will be the first unused block */
	if (cache)
		cache = find_next_mrc_cache(entry, cache);

	/*
	 * If we have got to the end, erase the entire mrc-cache area and start
	 * again at block 0.
	 */
	if (!cache) {
		debug("Erasing the MRC cache region of %x bytes at %x\n",
		      entry->length, entry->offset);

		ret = spi_flash_erase_dm(sf, entry->offset, entry->length);
		if (ret) {
			debug("Failed to erase flash region\n");
			return ret;
		}
		cache = (struct mrc_data_container *)base_addr;
	}

	/* Write the data out */
	offset = (ulong)cache - base_addr + entry->offset;
	debug("Write MRC cache update to flash at %lx\n", offset);
	ret = spi_flash_write_dm(sf, offset, cur->data_size + sizeof(*cur),
				 cur);
	if (ret) {
		debug("Failed to write to SPI flash\n");
		return ret;
	}

	return 0;
}
Ejemplo n.º 2
0
/*
 * Find the largest index block in the MRC cache. Return NULL if none is
 * found.
 */
static struct mrc_data_container *find_current_mrc_cache_local
	(struct mrc_data_container *mrc_cache, u32 region_size)
{
	u32 region_end;
	u32 entry_id = 0;
	struct mrc_data_container *mrc_next = mrc_cache;

	region_end = (u32) mrc_cache + region_size;

	/* Search for the last filled entry in the region */
	while (is_mrc_cache(mrc_next)) {
		entry_id++;
		mrc_cache = mrc_next;
		mrc_next = next_mrc_block(mrc_next);
		if ((u32)mrc_next >= region_end) {
			/* Stay in the MRC data region */
			break;
		}
	}

	if (entry_id == 0) {
		printk(BIOS_ERR, "%s: No valid fast boot cache found.\n",
			__func__);
		return NULL;
	}

	/* Verify checksum */
	if (mrc_cache->mrc_checksum !=
	    compute_ip_checksum(mrc_cache->mrc_data,
				mrc_cache->mrc_data_size)) {
		printk(BIOS_ERR, "%s: fast boot cache checksum mismatch\n",
			__func__);
		return NULL;
	}

	printk(BIOS_DEBUG, "%s: picked entry %u from cache block\n", __func__,
	       entry_id - 1);

	return mrc_cache;
}
Ejemplo n.º 3
0
struct mrc_data_container *mrccache_find_current(struct mrc_region *entry)
{
	struct mrc_data_container *cache, *next;
	ulong base_addr, end_addr;
	uint id;

	base_addr = entry->base + entry->offset;
	end_addr = base_addr + entry->length;
	cache = NULL;

	/* Search for the last filled entry in the region */
	for (id = 0, next = (struct mrc_data_container *)base_addr;
	     is_mrc_cache(next);
	     id++) {
		cache = next;
		next = next_mrc_block(next);
		if ((ulong)next >= end_addr)
			break;
	}

	if (id-- == 0) {
		debug("%s: No valid MRC cache found.\n", __func__);
		return NULL;
	}

	/* Verify checksum */
	if (cache->checksum != compute_ip_checksum(cache->data,
						   cache->data_size)) {
		printf("%s: MRC cache checksum mismatch\n", __func__);
		return NULL;
	}

	debug("%s: picked entry %u from cache block\n", __func__, id);

	return cache;
}