From: Stefan Roese Date: Wed, 6 Apr 2016 09:02:22 +0000 (+0200) Subject: bootcounter_ram: Flush dcache after data is written into SDRAM X-Git-Tag: v2016.05-rc1~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=20adda4cf8980a9df1d966bd7bec918ac3e4e5d6;p=platform%2Fkernel%2Fu-boot.git bootcounter_ram: Flush dcache after data is written into SDRAM This patch adds a call to flush_dcache_range() to bootcount_store() to make sure, that the bootcounter data (including the patterns) is written to memory. Without this, platforms with dcache enabled may not have the bootcounter updated upon reset. Signed-off-by: Stefan Roese Cc: Valentin Longchamp --- diff --git a/drivers/bootcount/bootcount_ram.c b/drivers/bootcount/bootcount_ram.c index 5bdabcd..e0d2669 100644 --- a/drivers/bootcount/bootcount_ram.c +++ b/drivers/bootcount/bootcount_ram.c @@ -35,6 +35,9 @@ void bootcount_store(ulong a) writel(patterns[i % NBR_OF_PATTERNS], &save_addr[i + OFFS_PATTERN]); + /* Make sure the data is written to RAM */ + flush_dcache_range((ulong)&save_addr[0], + (ulong)&save_addr[REPEAT_PATTERN + OFFS_PATTERN]); } ulong bootcount_load(void)