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git01.mediatek.com / filogic / uboot / 10c93a65f58e4aa466c0bca80f0ff9b6b6d1bccb / . / drivers / bootcount / bootcount.c
blob: 0299a5a8395cbc344c3fe582f825b5d493b9a9c9 [file] [log] [blame]
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]1/*
Stefan Roese033848e2012-08-16 17:55:41 +0000[diff] [blame]2 * (C) Copyright 2010-2012
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]3 * Stefan Roese, DENX Software Engineering, sr@denx.de.
4 *
Wolfgang Denkd79de1d2013-07-08 09:37:19 +0200[diff] [blame]5 * SPDX-License-Identifier: GPL-2.0+
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]6 */
7
Stefan Roese033848e2012-08-16 17:55:41 +0000[diff] [blame]8#include <bootcount.h>
9#include <linux/compiler.h>
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]10
11/*
12 * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This
13 * way, some boards can define it directly in their config header.
14 */
15#if !defined(CONFIG_SYS_BOOTCOUNT_ADDR)
16
Heiko Schocher466924f2010-02-18 08:08:25 +0100[diff] [blame]17#if defined(CONFIG_QE)
Zhao Qiang978679d2014-06-03 16:27:07 +0800[diff] [blame]18#include <linux/immap_qe.h>
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]19#define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + 0x110000 + \
20 QE_MURAM_SIZE - 2 * sizeof(u32))
Robert P. J. Day26a4e392015-12-22 07:15:14 -0500[diff] [blame]21#endif /* defined(CONFIG_QE) */
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]22
23#if defined(CONFIG_4xx)
24#define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_OCM_DATA_ADDR + \
25 CONFIG_SYS_BOOTCOUNT_ADDR)
26#endif /* defined(CONFIG_4xx) */
27
28#endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
29
Stefan Roese033848e2012-08-16 17:55:41 +0000[diff] [blame]30/* Now implement the generic default functions */
31#if defined(CONFIG_SYS_BOOTCOUNT_ADDR)
32__weak void bootcount_store(ulong a)
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]33{
34 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
35
36#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
Stefan Roese033848e2012-08-16 17:55:41 +0000[diff] [blame]37 raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]38#else
Stefan Roese033848e2012-08-16 17:55:41 +0000[diff] [blame]39 raw_bootcount_store(reg, a);
40 raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
Robert P. J. Day26a4e392015-12-22 07:15:14 -0500[diff] [blame]41#endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]42}
43
Stefan Roese033848e2012-08-16 17:55:41 +0000[diff] [blame]44__weak ulong bootcount_load(void)
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]45{
46 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
47
48#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
Stefan Roese033848e2012-08-16 17:55:41 +0000[diff] [blame]49 u32 tmp = raw_bootcount_load(reg);
Michael Weiss8eed66d2010-05-20 16:09:35 +0200[diff] [blame]50
51 if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]52 return 0;
53 else
Michael Weiss8eed66d2010-05-20 16:09:35 +0200[diff] [blame]54 return (tmp & 0x0000ffff);
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]55#else
Stefan Roese033848e2012-08-16 17:55:41 +0000[diff] [blame]56 if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]57 return 0;
58 else
Stefan Roese033848e2012-08-16 17:55:41 +0000[diff] [blame]59 return raw_bootcount_load(reg);
Robert P. J. Day26a4e392015-12-22 07:15:14 -0500[diff] [blame]60#endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */
Stefan Roeseed7aaf82010-04-28 10:47:36 +0200[diff] [blame]61}
Robert P. J. Day26a4e392015-12-22 07:15:14 -0500[diff] [blame]62#endif /* defined(CONFIG_SYS_BOOTCOUNT_ADDR) */