mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 17:08:52 +09:00
![Simon Glass](/assets/img/avatar_default.png)
Add a way to decode a memory region, including the memory type (sram or sdram) and its start address and size. Signed-off-by: Simon Glass <sjg@chromium.org>
118 lines
2.9 KiB
C
118 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2017 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <linux/libfdt.h>
|
|
#include <dm/of_access.h>
|
|
#include <dm/of_extra.h>
|
|
#include <dm/ofnode.h>
|
|
|
|
int ofnode_read_fmap_entry(ofnode node, struct fmap_entry *entry)
|
|
{
|
|
const char *prop;
|
|
u32 reg[2];
|
|
|
|
if (ofnode_read_u32_array(node, "reg", reg, 2)) {
|
|
debug("Node '%s' has bad/missing 'reg' property\n",
|
|
ofnode_get_name(node));
|
|
return -log_ret(ENOENT);
|
|
}
|
|
entry->offset = reg[0];
|
|
entry->length = reg[1];
|
|
entry->used = ofnode_read_s32_default(node, "used", entry->length);
|
|
prop = ofnode_read_string(node, "compress");
|
|
entry->compress_algo = prop && !strcmp(prop, "lzo") ?
|
|
FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
|
|
prop = ofnode_read_string(node, "hash");
|
|
if (prop)
|
|
entry->hash_size = strlen(prop);
|
|
entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
|
|
entry->hash = (uint8_t *)prop;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ofnode_decode_region(ofnode node, const char *prop_name, fdt_addr_t *basep,
|
|
fdt_size_t *sizep)
|
|
{
|
|
const fdt_addr_t *cell;
|
|
int len;
|
|
|
|
debug("%s: %s: %s\n", __func__, ofnode_get_name(node), prop_name);
|
|
cell = ofnode_get_property(node, prop_name, &len);
|
|
if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
|
|
debug("cell=%p, len=%d\n", cell, len);
|
|
return -1;
|
|
}
|
|
|
|
*basep = fdt_addr_to_cpu(*cell);
|
|
*sizep = fdt_size_to_cpu(cell[1]);
|
|
debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
|
|
(ulong)*sizep);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ofnode_decode_memory_region(ofnode config_node, const char *mem_type,
|
|
const char *suffix, fdt_addr_t *basep,
|
|
fdt_size_t *sizep)
|
|
{
|
|
char prop_name[50];
|
|
const char *mem;
|
|
fdt_size_t size, offset_size;
|
|
fdt_addr_t base, offset;
|
|
ofnode node;
|
|
|
|
if (!ofnode_valid(config_node)) {
|
|
config_node = ofnode_path("/config");
|
|
if (!ofnode_valid(config_node)) {
|
|
debug("%s: Cannot find /config node\n", __func__);
|
|
return -ENOENT;
|
|
}
|
|
}
|
|
if (!suffix)
|
|
suffix = "";
|
|
|
|
snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
|
|
suffix);
|
|
mem = ofnode_read_string(config_node, prop_name);
|
|
if (!mem) {
|
|
debug("%s: No memory type for '%s', using /memory\n", __func__,
|
|
prop_name);
|
|
mem = "/memory";
|
|
}
|
|
|
|
node = ofnode_path(mem);
|
|
if (!ofnode_valid(node)) {
|
|
debug("%s: Failed to find node '%s'\n", __func__, mem);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/*
|
|
* Not strictly correct - the memory may have multiple banks. We just
|
|
* use the first
|
|
*/
|
|
if (ofnode_decode_region(node, "reg", &base, &size)) {
|
|
debug("%s: Failed to decode memory region %s\n", __func__,
|
|
mem);
|
|
return -EINVAL;
|
|
}
|
|
|
|
snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
|
|
suffix);
|
|
if (ofnode_decode_region(config_node, prop_name, &offset,
|
|
&offset_size)) {
|
|
debug("%s: Failed to decode memory region '%s'\n", __func__,
|
|
prop_name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
*basep = base + offset;
|
|
*sizep = offset_size;
|
|
|
|
return 0;
|
|
}
|