mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 13:56:30 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
|
|
* (C) Copyright 2010
|
|
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
const ulong patterns[] = { 0x00000000,
|
|
0xFFFFFFFF,
|
|
0xFF00FF00,
|
|
0x0F0F0F0F,
|
|
0xF0F0F0F0};
|
|
const ulong NBR_OF_PATTERNS = sizeof(patterns) / sizeof(*patterns);
|
|
const ulong OFFS_PATTERN = 3;
|
|
const ulong REPEAT_PATTERN = 1000;
|
|
|
|
void bootcount_store(ulong a)
|
|
{
|
|
ulong *save_addr;
|
|
ulong size = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
|
|
size += gd->bd->bi_dram[i].size;
|
|
save_addr = (ulong *)(size - BOOTCOUNT_ADDR);
|
|
writel(a, save_addr);
|
|
writel(BOOTCOUNT_MAGIC, &save_addr[1]);
|
|
|
|
for (i = 0; i < REPEAT_PATTERN; i++)
|
|
writel(patterns[i % NBR_OF_PATTERNS],
|
|
&save_addr[i + OFFS_PATTERN]);
|
|
|
|
}
|
|
|
|
ulong bootcount_load(void)
|
|
{
|
|
ulong *save_addr;
|
|
ulong size = 0;
|
|
ulong counter = 0;
|
|
int i, tmp;
|
|
|
|
for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
|
|
size += gd->bd->bi_dram[i].size;
|
|
save_addr = (ulong *)(size - BOOTCOUNT_ADDR);
|
|
|
|
counter = readl(&save_addr[0]);
|
|
|
|
/* Is the counter reliable, check in the big pattern for bit errors */
|
|
for (i = 0; (i < REPEAT_PATTERN) && (counter != 0); i++) {
|
|
tmp = readl(&save_addr[i + OFFS_PATTERN]);
|
|
if (tmp != patterns[i % NBR_OF_PATTERNS])
|
|
counter = 0;
|
|
}
|
|
return counter;
|
|
}
|