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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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48
lib/binman.c Normal file
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@ -0,0 +1,48 @@
// 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>
struct binman_info {
ofnode image;
};
static struct binman_info *binman;
int binman_entry_find(const char *name, struct binman_entry *entry)
{
ofnode node;
int ret;
node = ofnode_find_subnode(binman->image, name);
if (!ofnode_valid(node))
return log_msg_ret("no binman node", -ENOENT);
ret = ofnode_read_u32(node, "image-pos", &entry->image_pos);
if (ret)
return log_msg_ret("bad binman node1", ret);
ret = ofnode_read_u32(node, "size", &entry->size);
if (ret)
return log_msg_ret("bad binman node2", ret);
return 0;
}
int binman_init(void)
{
binman = malloc(sizeof(struct binman_info));
if (!binman)
return log_msg_ret("space for binman", -ENOMEM);
binman->image = ofnode_path("/binman");
if (!ofnode_valid(binman->image))
return log_msg_ret("binman node", -EINVAL);
return 0;
}