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authorTrent Piepho <tpiepho@impinj.com>2019-03-27 23:50:09 +0000
committerTom Rini <trini@konsulko.com>2019-04-23 17:57:27 -0400
commitb4353b371322b54d8effd8737e3f7ba021950180 (patch)
tree361d800d7173ed5302d748627335a645c3f66ee4 /common
parent4c6be01c2719e78cd7ff257dd65a666623566863 (diff)
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bootm: Simplying cache flush code
The cache flush of the kernel load area needs to be aligned outward to the DMA cache alignment. The operations are simpler if we think of this as aligning the start down, ALIGN_DOWN(load, ARCH_DMA_MINALIGN), and aligning the end up, ALIGN(load_end, ARCH_DMA_MINALIGN), and then find the length of the flushed region by subtracting the former from the latter. Cc: Tom Rini <trini@konsulko.com> Cc: Simon Glass <sjg@chromium.org> Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Signed-off-by: Trent Piepho <tpiepho@impinj.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common')
-rw-r--r--common/bootm.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/common/bootm.c b/common/bootm.c
index 3adbcea..42358b8 100644
--- a/common/bootm.c
+++ b/common/bootm.c
@@ -450,7 +450,6 @@ static int bootm_load_os(bootm_headers_t *images, int boot_progress)
ulong image_start = os.image_start;
ulong image_len = os.image_len;
ulong flush_start = ALIGN_DOWN(load, ARCH_DMA_MINALIGN);
- ulong flush_len;
bool no_overlap;
void *load_buf, *image_buf;
int err;
@@ -465,11 +464,7 @@ static int bootm_load_os(bootm_headers_t *images, int boot_progress)
return err;
}
- flush_len = load_end - load;
- if (flush_start < load)
- flush_len += load - flush_start;
-
- flush_cache(flush_start, ALIGN(flush_len, ARCH_DMA_MINALIGN));
+ flush_cache(flush_start, ALIGN(load_end, ARCH_DMA_MINALIGN) - flush_start);
debug(" kernel loaded at 0x%08lx, end = 0x%08lx\n", load, load_end);
bootstage_mark(BOOTSTAGE_ID_KERNEL_LOADED);