mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 00:21:06 +00:00
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
|
/*
|
||
|
|
* (C) Copyright 2010
|
||
|
|
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
|
||
|
|
*
|
||
|
|
* See file CREDITS for list of people who contributed to this
|
||
|
|
* project.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation; either version 2 of
|
||
|
|
* the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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;
|
||
|
|
}
|