1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2017 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
9 #include <linux/libfdt.h>
10 #include <dm/of_access.h>
11 #include <dm/of_extra.h>
12 #include <dm/ofnode.h>
14 int ofnode_read_fmap_entry(ofnode node, struct fmap_entry *entry)
18 if (ofnode_read_u32(node, "image-pos", &entry->offset)) {
19 debug("Node '%s' has bad/missing 'image-pos' property\n",
20 ofnode_get_name(node));
21 return log_ret(-ENOENT);
23 if (ofnode_read_u32(node, "size", &entry->length)) {
24 debug("Node '%s' has bad/missing 'size' property\n",
25 ofnode_get_name(node));
26 return log_ret(-ENOENT);
28 entry->used = ofnode_read_s32_default(node, "used", entry->length);
29 prop = ofnode_read_string(node, "compress");
31 if (!strcmp(prop, "lz4"))
32 entry->compress_algo = FMAP_COMPRESS_LZ4;
34 return log_msg_ret("Unknown compression algo",
37 entry->compress_algo = FMAP_COMPRESS_NONE;
39 entry->unc_length = ofnode_read_s32_default(node, "uncomp-size",
41 prop = ofnode_read_string(node, "hash");
43 entry->hash_size = strlen(prop);
44 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
45 entry->hash = (uint8_t *)prop;
50 int ofnode_decode_region(ofnode node, const char *prop_name, fdt_addr_t *basep,
53 const fdt_addr_t *cell;
56 debug("%s: %s: %s\n", __func__, ofnode_get_name(node), prop_name);
57 cell = ofnode_get_property(node, prop_name, &len);
58 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
59 debug("cell=%p, len=%d\n", cell, len);
63 *basep = fdt_addr_to_cpu(*cell);
64 *sizep = fdt_size_to_cpu(cell[1]);
65 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
71 int ofnode_decode_memory_region(ofnode config_node, const char *mem_type,
72 const char *suffix, fdt_addr_t *basep,
77 fdt_size_t size, offset_size;
78 fdt_addr_t base, offset;
81 if (!ofnode_valid(config_node)) {
82 config_node = ofnode_path("/config");
83 if (!ofnode_valid(config_node)) {
84 debug("%s: Cannot find /config node\n", __func__);
91 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
93 mem = ofnode_read_string(config_node, prop_name);
95 debug("%s: No memory type for '%s', using /memory\n", __func__,
100 node = ofnode_path(mem);
101 if (!ofnode_valid(node)) {
102 debug("%s: Failed to find node '%s'\n", __func__, mem);
107 * Not strictly correct - the memory may have multiple banks. We just
110 if (ofnode_decode_region(node, "reg", &base, &size)) {
111 debug("%s: Failed to decode memory region %s\n", __func__,
116 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
118 if (ofnode_decode_region(config_node, prop_name, &offset,
120 debug("%s: Failed to decode memory region '%s'\n", __func__,
125 *basep = base + offset;
126 *sizep = offset_size;