diff options
author | Stefan Roese <sr@denx.de> | 2012-08-16 17:55:41 (GMT) |
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committer | Wolfgang Denk <wd@denx.de> | 2012-09-01 12:26:02 (GMT) |
commit | 0044c42e94ecc258728190919b4619508fb83089 (patch) | |
tree | 4964b48f60ad93a2b77a76104b0ca9f664bde3b3 /drivers/bootcount/bootcount_ram.c | |
parent | 7fe7701d322e9147c06d68ad6ebef91289b9a57e (diff) | |
download | u-boot-fsl-qoriq-0044c42e94ecc258728190919b4619508fb83089.tar.xz |
Consolidate bootcount code into drivers/bootcount
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>
Diffstat (limited to 'drivers/bootcount/bootcount_ram.c')
-rw-r--r-- | drivers/bootcount/bootcount_ram.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/bootcount/bootcount_ram.c b/drivers/bootcount/bootcount_ram.c new file mode 100644 index 0000000..8655af7 --- /dev/null +++ b/drivers/bootcount/bootcount_ram.c @@ -0,0 +1,72 @@ +/* + * (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; +} |