7  * SPDX-License-Identifier:	GPL-2.0
22 	struct mrc_data_container *cache)  in next_mrc_block()  argument
25 	u32 mrc_size = sizeof(*cache) + cache->data_size;  in next_mrc_block()
26 	u8 *region_ptr = (u8 *)cache;  in next_mrc_block()
28 	if (mrc_size & (MRC_DATA_ALIGN - 1UL)) {  in next_mrc_block()
29 		mrc_size &= ~(MRC_DATA_ALIGN - 1UL);  in next_mrc_block()
38 static int is_mrc_cache(struct mrc_data_container *cache)  in is_mrc_cache()  argument
40 	return cache && (cache->signature == MRC_DATA_SIGNATURE);  in is_mrc_cache()
45 	struct mrc_data_container *cache, *next;  in mrccache_find_current()  local
49 	base_addr = entry->base + entry->offset;  in mrccache_find_current()
50 	end_addr = base_addr + entry->length;  in mrccache_find_current()
51 	cache = NULL;  in mrccache_find_current()
57 		cache = next;  in mrccache_find_current()
63 	if (id-- == 0) {  in mrccache_find_current()
64 		debug("%s: No valid MRC cache found.\n", __func__);  in mrccache_find_current()
69 	if (cache->checksum != compute_ip_checksum(cache->data,  in mrccache_find_current()
70 						   cache->data_size)) {  in mrccache_find_current()
71 		printf("%s: MRC cache checksum mismatch\n", __func__);  in mrccache_find_current()
75 	debug("%s: picked entry %u from cache block\n", __func__, id);  in mrccache_find_current()
77 	return cache;  in mrccache_find_current()
81  * find_next_mrc_cache() - get next cache entry
83  * @entry:	MRC cache flash area
84  * @cache:	Entry to start from
86  * @return next cache entry if found, NULL if we got to the end
89 		struct mrc_data_container *cache)  in find_next_mrc_cache()  argument
93 	base_addr = entry->base + entry->offset;  in find_next_mrc_cache()
94 	end_addr = base_addr + entry->length;  in find_next_mrc_cache()
96 	cache = next_mrc_block(cache);  in find_next_mrc_cache()
97 	if ((ulong)cache >= end_addr) {  in find_next_mrc_cache()
99 		cache = NULL;  in find_next_mrc_cache()
102 		debug("%s: picked next entry from cache block at %p\n",  in find_next_mrc_cache()
103 		      __func__, cache);  in find_next_mrc_cache()
106 	return cache;  in find_next_mrc_cache()
112 	struct mrc_data_container *cache;  in mrccache_update()  local
118 		return -EINVAL;  in mrccache_update()
121 	base_addr = entry->base + entry->offset;  in mrccache_update()
122 	debug("Updating MRC cache data\n");  in mrccache_update()
123 	cache = mrccache_find_current(entry);  in mrccache_update()
124 	if (cache && (cache->data_size == cur->data_size) &&  in mrccache_update()
125 	    (!memcmp(cache, cur, cache->data_size + sizeof(*cur)))) {  in mrccache_update()
127 		return -EEXIST;  in mrccache_update()
131 	if (cache)  in mrccache_update()
132 		cache = find_next_mrc_cache(entry, cache);  in mrccache_update()
135 	 * If we have got to the end, erase the entire mrc-cache area and start  in mrccache_update()
138 	if (!cache) {  in mrccache_update()
139 		debug("Erasing the MRC cache region of %x bytes at %x\n",  in mrccache_update()
140 		      entry->length, entry->offset);  in mrccache_update()
142 		ret = spi_flash_erase_dm(sf, entry->offset, entry->length);  in mrccache_update()
147 		cache = (struct mrc_data_container *)base_addr;  in mrccache_update()
151 	offset = (ulong)cache - base_addr + entry->offset;  in mrccache_update()
152 	debug("Write MRC cache update to flash at %lx\n", offset);  in mrccache_update()
153 	ret = spi_flash_write_dm(sf, offset, cur->data_size + sizeof(*cur),  in mrccache_update()
165 	struct mrc_data_container *cache;  in mrccache_reserve()  local
168 	if (!gd->arch.mrc_output_len)  in mrccache_reserve()
171 	/* adjust stack pointer to store pure cache data plus the header */  in mrccache_reserve()
172 	gd->start_addr_sp -= (gd->arch.mrc_output_len + MRC_DATA_HEADER_SIZE);  in mrccache_reserve()
173 	cache = (struct mrc_data_container *)gd->start_addr_sp;  in mrccache_reserve()
175 	cache->signature = MRC_DATA_SIGNATURE;  in mrccache_reserve()
176 	cache->data_size = gd->arch.mrc_output_len;  in mrccache_reserve()
177 	checksum = compute_ip_checksum(gd->arch.mrc_output, cache->data_size);  in mrccache_reserve()
179 	      cache->data_size, checksum);  in mrccache_reserve()
180 	cache->checksum = checksum;  in mrccache_reserve()
181 	cache->reserved = 0;  in mrccache_reserve()
182 	memcpy(cache->data, gd->arch.mrc_output, cache->data_size);  in mrccache_reserve()
184 	/* gd->arch.mrc_output now points to the container */  in mrccache_reserve()
185 	gd->arch.mrc_output = (char *)cache;  in mrccache_reserve()
187 	gd->start_addr_sp &= ~0xf;  in mrccache_reserve()
194 	const void *blob = gd->fdt_blob;  in mrccache_get_region()
203 		return -ENOENT;  in mrccache_get_region()
206 	if (fdtdec_get_int_array(blob, node, "memory-map", reg, 2))  in mrccache_get_region()
207 		return -EINVAL;  in mrccache_get_region()
208 	entry->base = reg[0];  in mrccache_get_region()
210 	/* Find the place where we put the MRC cache */  in mrccache_get_region()
211 	mrc_node = fdt_subnode_offset(blob, node, "rw-mrc-cache");  in mrccache_get_region()
213 		return -EPERM;  in mrccache_get_region()
216 		return -EINVAL;  in mrccache_get_region()
217 	entry->offset = reg[0];  in mrccache_get_region()
218 	entry->length = reg[1];  in mrccache_get_region()
238 	if (!gd->arch.mrc_output_len)  in mrccache_save()
241 	      gd->arch.mrc_output_len);  in mrccache_save()
246 	data  = (struct mrc_data_container *)gd->arch.mrc_output;  in mrccache_save()
249 		debug("Saved MRC data with checksum %04x\n", data->checksum);  in mrccache_save()
250 	} else if (ret == -EEXIST) {  in mrccache_save()