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https://github.com/smaeul/u-boot.git
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8f9877df95
Add support for accessing an entry's contents in memory-mapped SPI flash. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
98 lines
2.2 KiB
C
98 lines
2.2 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("import-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_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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binman->rom_offset = ROM_OFFSET_NONE;
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return 0;
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}
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