bootcount.c
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/*
* (C) Copyright 2010-2012
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <bootcount.h>
#include <linux/compiler.h>
/*
* Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This
* way, some boards can define it directly in their config header.
*/
#if !defined(CONFIG_SYS_BOOTCOUNT_ADDR)
#if defined(CONFIG_MPC5xxx)
#define CONFIG_SYS_BOOTCOUNT_ADDR (MPC5XXX_CDM_BRDCRMB)
#define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
#endif /* defined(CONFIG_MPC5xxx) */
#if defined(CONFIG_MPC512X)
#define CONFIG_SYS_BOOTCOUNT_ADDR (&((immap_t *)CONFIG_SYS_IMMR)->clk.bcr)
#define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
#endif /* defined(CONFIG_MPC512X) */
#if defined(CONFIG_8xx)
#define CONFIG_SYS_BOOTCOUNT_ADDR (((immap_t *)CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + \
CPM_BOOTCOUNT_ADDR)
#endif /* defined(CONFIG_8xx) */
#if defined(CONFIG_MPC8260)
#include <asm/cpm_8260.h>
#define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR)
#endif /* defined(CONFIG_MPC8260) */
#if defined(CONFIG_QE)
#include <linux/immap_qe.h>
#define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + 0x110000 + \
QE_MURAM_SIZE - 2 * sizeof(u32))
#endif /* defined(CONFIG_MPC8360) */
#if defined(CONFIG_4xx)
#define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_OCM_DATA_ADDR + \
CONFIG_SYS_BOOTCOUNT_ADDR)
#endif /* defined(CONFIG_4xx) */
#endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
/* Now implement the generic default functions */
#if defined(CONFIG_SYS_BOOTCOUNT_ADDR)
__weak void bootcount_store(ulong a)
{
void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
#else
raw_bootcount_store(reg, a);
raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
#endif
}
__weak ulong bootcount_load(void)
{
void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
u32 tmp = raw_bootcount_load(reg);
if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
return 0;
else
return (tmp & 0x0000ffff);
#else
if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
return 0;
else
return raw_bootcount_load(reg);
#endif
}
#endif