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/*
* Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <libfdt.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 = sc == 2 ? fdt64_to_cpu(*(fdt64_t *)val) :
fdt32_to_cpu(*val);
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 = ac == 2 ?
fdt64_to_cpu(*(fdt64_t *)val) : fdt32_to_cpu(*val);
val += ac;
gd->bd->bi_dram[i].size = sc == 2 ?
fdt64_to_cpu(*(fdt64_t *)val) : fdt32_to_cpu(*val);
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);
}
}
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