mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 10:18:38 +00:00
7b3a032dd3
Because DT properties are 4-byte aligned, the pointer access *(fdt64_t *) in this code causes unaligned access. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
/*
|
|
* Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <libfdt.h>
|
|
#include <fdtdec.h>
|
|
#include <linux/err.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static const void *get_memory_reg_prop(const void *fdt, int *lenp)
|
|
{
|
|
int offset;
|
|
|
|
offset = fdt_path_offset(fdt, "/memory");
|
|
if (offset < 0)
|
|
return NULL;
|
|
|
|
return fdt_getprop(fdt, offset, "reg", lenp);
|
|
}
|
|
|
|
int dram_init(void)
|
|
{
|
|
const void *fdt = gd->fdt_blob;
|
|
const fdt32_t *val;
|
|
int ac, sc, len;
|
|
|
|
ac = fdt_address_cells(fdt, 0);
|
|
sc = fdt_size_cells(fdt, 0);
|
|
if (ac < 0 || sc < 1 || sc > 2) {
|
|
printf("invalid address/size cells\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
val = get_memory_reg_prop(fdt, &len);
|
|
if (len / sizeof(*val) < ac + sc)
|
|
return -EINVAL;
|
|
|
|
val += ac;
|
|
|
|
gd->ram_size = fdtdec_get_number(val, sc);
|
|
|
|
debug("DRAM size = %08lx\n", (unsigned long)gd->ram_size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void dram_init_banksize(void)
|
|
{
|
|
const void *fdt = gd->fdt_blob;
|
|
const fdt32_t *val;
|
|
int ac, sc, cells, len, i;
|
|
|
|
val = get_memory_reg_prop(fdt, &len);
|
|
if (len < 0)
|
|
return;
|
|
|
|
ac = fdt_address_cells(fdt, 0);
|
|
sc = fdt_size_cells(fdt, 0);
|
|
if (ac < 1 || sc > 2 || sc < 1 || sc > 2) {
|
|
printf("invalid address/size cells\n");
|
|
return;
|
|
}
|
|
|
|
cells = ac + sc;
|
|
|
|
len /= sizeof(*val);
|
|
|
|
for (i = 0; i < CONFIG_NR_DRAM_BANKS && len >= cells;
|
|
i++, len -= cells) {
|
|
gd->bd->bi_dram[i].start = fdtdec_get_number(val, ac);
|
|
val += ac;
|
|
gd->bd->bi_dram[i].size = fdtdec_get_number(val, sc);
|
|
val += sc;
|
|
|
|
debug("DRAM bank %d: start = %08lx, size = %08lx\n",
|
|
i, (unsigned long)gd->bd->bi_dram[i].start,
|
|
(unsigned long)gd->bd->bi_dram[i].size);
|
|
}
|
|
}
|