mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-07 03:36:16 +09:00
0044c42e94
This patch moves all bootcount implementations into a common directory: drivers/bootcount. The generic bootcount driver is now usable not only by powerpc platforms, but others as well. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Valentin Longchamp <valentin.longchamp@keymile.com> Cc: Christian Riesch <christian.riesch@omicron.at> Cc: Manfred Rudigier <manfred.rudigier@omicron.at> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Reinhard Meyer <reinhard.meyer@emk-elektronik.de> Tested-by: Valentin Longchamp <valentin.longchamp@keymile.com> Tested-by: Christian Riesch <christian.riesch@omicron.at> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Mike Frysinger <vapier@gentoo.org>
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;
|
|
}
|