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bootcount: flush after storing the bootcounter

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If the bootcounter address is in a cached memory,
a flush of dcache must occur after updateing the bootcounter.

Issue found on i.MX6 where bootcounter is put into the internal
(cached) IRAM.

Signed-off-by: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Stefano Babic 2018-02-22 12:30:41 +01:00
parent 474ecd2c84
commit 1947c2d2a0
1 changed files with 3 additions and 0 deletions
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3
drivers/bootcount/bootcount.c
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@ -18,6 +18,9 @@ __weak void bootcount_store(ulong a)
raw_bootcount_store(reg, a); raw_bootcount_store(reg, a);
raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC); raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
#endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */ #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */
flush_dcache_range(CONFIG_SYS_BOOTCOUNT_ADDR,
CONFIG_SYS_BOOTCOUNT_ADDR +
CONFIG_SYS_CACHELINE_SIZE);
} }
__weak ulong bootcount_load(void) __weak ulong bootcount_load(void)