mirror of
https://github.com/brain-hackers/u-boot-brain
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83187546ae
Add support for multiple images, since these are used on x86 now. Select the first image for now, since that is generally the correct one. At some point we can add a way to determine which image is currently running. Signed-off-by: Simon Glass <sjg@chromium.org>
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
// SPDX-License-Identifier: Intel
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/*
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* Access to binman information at runtime
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*
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* Copyright 2019 Google LLC
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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 <binman.h>
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#include <dm.h>
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#include <log.h>
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#include <malloc.h>
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#include <mapmem.h>
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/**
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* struct binman_info - Information needed by the binman library
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*
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* @image: Node describing the image we are running from
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* @rom_offset: Offset from an image_pos to the memory-mapped address, or
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* ROM_OFFSET_NONE if the ROM is not memory-mapped. Can be positive or
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* negative
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*/
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struct binman_info {
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ofnode image;
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int rom_offset;
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};
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#define ROM_OFFSET_NONE (-1)
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static struct binman_info *binman;
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static int binman_entry_find_internal(ofnode node, const char *name,
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struct binman_entry *entry)
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{
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int ret;
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if (!ofnode_valid(node))
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node = binman->image;
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node = ofnode_find_subnode(node, name);
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if (!ofnode_valid(node))
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return log_msg_ret("node", -ENOENT);
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ret = ofnode_read_u32(node, "image-pos", &entry->image_pos);
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if (ret)
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return log_msg_ret("image-pos", ret);
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ret = ofnode_read_u32(node, "size", &entry->size);
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if (ret)
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return log_msg_ret("size", ret);
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return 0;
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}
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int binman_entry_find(const char *name, struct binman_entry *entry)
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{
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return binman_entry_find_internal(binman->image, name, entry);
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}
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int binman_entry_map(ofnode parent, const char *name, void **bufp, int *sizep)
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{
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struct binman_entry entry;
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int ret;
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if (binman->rom_offset == ROM_OFFSET_NONE)
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return -EPERM;
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ret = binman_entry_find_internal(parent, name, &entry);
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if (ret)
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return log_msg_ret("entry", ret);
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if (sizep)
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*sizep = entry.size;
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*bufp = map_sysmem(entry.image_pos + binman->rom_offset, entry.size);
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return 0;
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}
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ofnode binman_section_find_node(const char *name)
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{
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return ofnode_find_subnode(binman->image, name);
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}
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void binman_set_rom_offset(int rom_offset)
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{
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binman->rom_offset = rom_offset;
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}
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int binman_get_rom_offset(void)
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{
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return binman->rom_offset;
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}
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int binman_init(void)
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{
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binman = malloc(sizeof(struct binman_info));
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if (!binman)
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return log_msg_ret("space for binman", -ENOMEM);
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binman->image = ofnode_path("/binman");
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if (!ofnode_valid(binman->image))
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return log_msg_ret("binman node", -EINVAL);
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if (ofnode_read_bool(binman->image, "multiple-images")) {
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ofnode node = ofnode_first_subnode(binman->image);
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if (!ofnode_valid(node))
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return log_msg_ret("first image", -ENOENT);
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binman->image = node;
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}
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binman->rom_offset = ROM_OFFSET_NONE;
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return 0;
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}
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