From bbac9222dcf2a4c233269e67ea38ddfb3536d85b Mon Sep 17 00:00:00 2001 From: Bryan O'Donoghue Date: Sun, 15 Apr 2018 11:48:17 +0100 Subject: [PATCH] bootm: Align cache flush begin address commit b4d956f6bc0f ("bootm: Align cache flush end address correctly") aligns the end address of the cache flush operation to a cache-line size to ensure lower-layers in the code accept the range provided and flush. A similar action should be taken for the begin address of a cache flush operation. The load address may not be aligned to a cache-line boundary, so ensure the passed address is aligned. Signed-off-by: Bryan O'Donoghue Reported-by: Breno Matheus Lima Suggested-by: Tom Rini Cc: Simon Glass Tested-by: Breno Lima Reviewed-by: Simon Glass --- common/bootm.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/common/bootm.c b/common/bootm.c index adb1213..3616291 100644 --- a/common/bootm.c +++ b/common/bootm.c @@ -434,6 +434,8 @@ static int bootm_load_os(bootm_headers_t *images, unsigned long *load_end, ulong blob_end = os.end; ulong image_start = os.image_start; ulong image_len = os.image_len; + ulong flush_start = ALIGN_DOWN(load, ARCH_DMA_MINALIGN); + ulong flush_len = *load_end - load; bool no_overlap; void *load_buf, *image_buf; int err; @@ -447,7 +449,11 @@ static int bootm_load_os(bootm_headers_t *images, unsigned long *load_end, bootstage_error(BOOTSTAGE_ID_DECOMP_IMAGE); return err; } - flush_cache(load, ALIGN(*load_end - load, ARCH_DMA_MINALIGN)); + + if (flush_start < load) + flush_len += load - flush_start; + + flush_cache(flush_start, ALIGN(flush_len, ARCH_DMA_MINALIGN)); debug(" kernel loaded at 0x%08lx, end = 0x%08lx\n", load, *load_end); bootstage_mark(BOOTSTAGE_ID_KERNEL_LOADED);