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binman: Add a library to access binman entries

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SPL and TPL can access information about binman entries using link-time
symbols but this is not available in U-Boot proper. Of course it could be
made available, but the intention is to just read the device tree.

Add support for this, so that U-Boot can locate entries.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2019-12-06 21:41:34 -07:00 • committed by Bin Meng
parent 553cb06887
commit 3c10dc95bd
5 changed files with 114 additions and 0 deletions
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45
include/binman.h Normal file
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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>
*/
#ifndef _BINMAN_H_
#define _BINMAN_H_
/**
*struct binman_entry - information about a binman entry
*
* @image_pos: Position of entry in the image
* @size: Size of entry
*/
struct binman_entry {
u32 image_pos;
u32 size;
};
/**
* binman_entry_find() - Find a binman symbol
*
* This searches the binman information in the device tree for a symbol of the
* given name
*
* @name: Path to entry to examine (e.g. "/read-only/u-boot")
* @entry: Returns information about the entry
* @return 0 if OK, -ENOENT if the path is not found, other -ve value if the
* binman information is invalid (missing image-pos or size)
*/
int binman_entry_find(const char *name, struct binman_entry *entry);
/**
* binman_init() - Set up the binman symbol information
*
* This locates the binary symbol information in the device tree ready for use
*
* @return 0 if OK, -ENOMEM if out of memory, -EINVAL if there is no binman node
*/
int binman_init(void);
#endif