mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-12 06:06:15 +09:00
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
![]() |
// SPDX-License-Identifier: GPL-2.0+
|
||
|
/*
|
||
|
* Copyright (C) 2016-2018 Socionext Inc.
|
||
|
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
|
||
|
*/
|
||
|
|
||
|
#include <common.h>
|
||
|
#include <fdt_support.h>
|
||
|
#include <fdtdec.h>
|
||
|
#include <linux/kernel.h>
|
||
|
#include <linux/printk.h>
|
||
|
|
||
|
#include "soc-info.h"
|
||
|
|
||
|
/*
|
||
|
* The DRAM PHY requires 64 byte scratch area in each DRAM channel
|
||
|
* for its dynamic PHY training feature.
|
||
|
*/
|
||
|
static int uniphier_ld20_fdt_mem_rsv(void *fdt, bd_t *bd)
|
||
|
{
|
||
|
unsigned long rsv_addr;
|
||
|
const unsigned long rsv_size = 64;
|
||
|
int i, ret;
|
||
|
|
||
|
if (!IS_ENABLED(CONFIG_ARCH_UNIPHIER_LD20) ||
|
||
|
uniphier_get_soc_id() != UNIPHIER_LD20_ID)
|
||
|
return 0;
|
||
|
|
||
|
for (i = 0; i < ARRAY_SIZE(bd->bi_dram); i++) {
|
||
|
if (!bd->bi_dram[i].size)
|
||
|
continue;
|
||
|
|
||
|
rsv_addr = bd->bi_dram[i].start + bd->bi_dram[i].size;
|
||
|
rsv_addr -= rsv_size;
|
||
|
|
||
|
ret = fdt_add_mem_rsv(fdt, rsv_addr, rsv_size);
|
||
|
if (ret)
|
||
|
return -ENOSPC;
|
||
|
|
||
|
pr_notice(" Reserved memory region for DRAM PHY training: addr=%lx size=%lx\n",
|
||
|
rsv_addr, rsv_size);
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int ft_board_setup(void *fdt, bd_t *bd)
|
||
|
{
|
||
|
int ret;
|
||
|
|
||
|
ret = uniphier_ld20_fdt_mem_rsv(fdt, bd);
|
||
|
if (ret)
|
||
|
return ret;
|
||
|
|
||
|
return 0;
|
||
|
}
|