130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2017 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <log.h>
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#include <linux/libfdt.h>
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#include <dm/of_access.h>
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#include <dm/of_extra.h>
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#include <dm/ofnode.h>
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int ofnode_read_fmap_entry(ofnode node, struct fmap_entry *entry)
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{
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const char *prop;
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if (ofnode_read_u32(node, "image-pos", &entry->offset)) {
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debug("Node '%s' has bad/missing 'image-pos' property\n",
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ofnode_get_name(node));
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return log_ret(-ENOENT);
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}
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if (ofnode_read_u32(node, "size", &entry->length)) {
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debug("Node '%s' has bad/missing 'size' property\n",
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ofnode_get_name(node));
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return log_ret(-ENOENT);
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}
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entry->used = ofnode_read_s32_default(node, "used", entry->length);
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prop = ofnode_read_string(node, "compress");
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if (prop) {
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if (!strcmp(prop, "lz4"))
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entry->compress_algo = FMAP_COMPRESS_LZ4;
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else
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return log_msg_ret("Unknown compression algo",
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-EINVAL);
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} else {
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entry->compress_algo = FMAP_COMPRESS_NONE;
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}
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entry->unc_length = ofnode_read_s32_default(node, "uncomp-size",
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entry->length);
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prop = ofnode_read_string(node, "hash");
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if (prop)
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entry->hash_size = strlen(prop);
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entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
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entry->hash = (uint8_t *)prop;
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return 0;
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}
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int ofnode_decode_region(ofnode node, const char *prop_name, fdt_addr_t *basep,
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fdt_size_t *sizep)
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{
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const fdt_addr_t *cell;
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int len;
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debug("%s: %s: %s\n", __func__, ofnode_get_name(node), prop_name);
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cell = ofnode_get_property(node, prop_name, &len);
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if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
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debug("cell=%p, len=%d\n", cell, len);
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return -1;
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}
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*basep = fdt_addr_to_cpu(*cell);
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*sizep = fdt_size_to_cpu(cell[1]);
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debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
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(ulong)*sizep);
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return 0;
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}
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int ofnode_decode_memory_region(ofnode config_node, const char *mem_type,
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const char *suffix, fdt_addr_t *basep,
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fdt_size_t *sizep)
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{
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char prop_name[50];
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const char *mem;
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fdt_size_t size, offset_size;
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fdt_addr_t base, offset;
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ofnode node;
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if (!ofnode_valid(config_node)) {
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config_node = ofnode_path("/config");
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if (!ofnode_valid(config_node)) {
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debug("%s: Cannot find /config node\n", __func__);
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return -ENOENT;
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}
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}
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if (!suffix)
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suffix = "";
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snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
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suffix);
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mem = ofnode_read_string(config_node, prop_name);
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if (!mem) {
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debug("%s: No memory type for '%s', using /memory\n", __func__,
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prop_name);
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mem = "/memory";
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}
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node = ofnode_path(mem);
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if (!ofnode_valid(node)) {
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debug("%s: Failed to find node '%s'\n", __func__, mem);
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return -ENOENT;
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}
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/*
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* Not strictly correct - the memory may have multiple banks. We just
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* use the first
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*/
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if (ofnode_decode_region(node, "reg", &base, &size)) {
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debug("%s: Failed to decode memory region %s\n", __func__,
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mem);
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return -EINVAL;
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}
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snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
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suffix);
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if (ofnode_decode_region(config_node, prop_name, &offset,
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&offset_size)) {
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debug("%s: Failed to decode memory region '%s'\n", __func__,
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prop_name);
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return -EINVAL;
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}
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*basep = base + offset;
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*sizep = offset_size;
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return 0;
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}
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