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- // SPDX-License-Identifier: Intel
- /*
- * Access to binman information at runtime
- *
- * Copyright 2019 Google LLC
- * Written by Simon Glass <sjg@chromium.org>
- */
- #include <common.h>
- #include <binman.h>
- #include <dm.h>
- #include <log.h>
- #include <malloc.h>
- #include <mapmem.h>
- /**
- * struct binman_info - Information needed by the binman library
- *
- * @image: Node describing the image we are running from
- * @rom_offset: Offset from an image_pos to the memory-mapped address, or
- * ROM_OFFSET_NONE if the ROM is not memory-mapped. Can be positive or
- * negative
- */
- struct binman_info {
- ofnode image;
- int rom_offset;
- };
- #define ROM_OFFSET_NONE (-1)
- static struct binman_info *binman;
- /**
- * find_image_node() - Find the top-level binman node
- *
- * Finds the binman node which can be used to load entries. The correct node
- * depends on whether multiple-images is in use.
- *
- * @nodep: Returns the node found, on success
- * @return 0 if OK, , -EINVAL if there is no /binman node, -ECHILD if multiple
- * images are being used but the first image is not available
- */
- static int find_image_node(ofnode *nodep)
- {
- ofnode node;
- node = ofnode_path("/binman");
- if (!ofnode_valid(node))
- return log_msg_ret("binman node", -EINVAL);
- if (ofnode_read_bool(node, "multiple-images")) {
- node = ofnode_first_subnode(node);
- if (!ofnode_valid(node))
- return log_msg_ret("first image", -ECHILD);
- }
- *nodep = node;
- return 0;
- }
- static int binman_entry_find_internal(ofnode node, const char *name,
- struct binman_entry *entry)
- {
- int ret;
- if (!ofnode_valid(node))
- node = binman->image;
- node = ofnode_find_subnode(node, name);
- if (!ofnode_valid(node))
- return log_msg_ret("node", -ENOENT);
- ret = ofnode_read_u32(node, "image-pos", &entry->image_pos);
- if (ret)
- return log_msg_ret("image-pos", ret);
- ret = ofnode_read_u32(node, "size", &entry->size);
- if (ret)
- return log_msg_ret("size", ret);
- return 0;
- }
- int binman_entry_find(const char *name, struct binman_entry *entry)
- {
- return binman_entry_find_internal(binman->image, name, entry);
- }
- int binman_entry_map(ofnode parent, const char *name, void **bufp, int *sizep)
- {
- struct binman_entry entry;
- int ret;
- if (binman->rom_offset == ROM_OFFSET_NONE)
- return -EPERM;
- ret = binman_entry_find_internal(parent, name, &entry);
- if (ret)
- return log_msg_ret("entry", ret);
- if (sizep)
- *sizep = entry.size;
- *bufp = map_sysmem(entry.image_pos + binman->rom_offset, entry.size);
- return 0;
- }
- ofnode binman_section_find_node(const char *name)
- {
- return ofnode_find_subnode(binman->image, name);
- }
- void binman_set_rom_offset(int rom_offset)
- {
- binman->rom_offset = rom_offset;
- }
- int binman_get_rom_offset(void)
- {
- return binman->rom_offset;
- }
- int binman_select_subnode(const char *name)
- {
- ofnode node;
- int ret;
- ret = find_image_node(&node);
- if (ret)
- return log_msg_ret("main", -ENOENT);
- node = ofnode_find_subnode(node, name);
- if (!ofnode_valid(node))
- return log_msg_ret("node", -ENOENT);
- binman->image = node;
- log_info("binman: Selected image subnode '%s'\n",
- ofnode_get_name(binman->image));
- return 0;
- }
- int binman_init(void)
- {
- int ret;
- binman = malloc(sizeof(struct binman_info));
- if (!binman)
- return log_msg_ret("space for binman", -ENOMEM);
- ret = find_image_node(&binman->image);
- if (ret)
- return log_msg_ret("node", -ENOENT);
- binman_set_rom_offset(ROM_OFFSET_NONE);
- log_debug("binman: Selected image node '%s'\n",
- ofnode_get_name(binman->image));
- return 0;
- }
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