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[U-Boot,01/11] sf: allocate cache aligned buffers to copy from flash

Message ID 1435922173-6531-2-git-send-email-vigneshr@ti.com
State Superseded
Delegated to: Tom Rini
Headers show

Commit Message

Vignesh Raghavendra July 3, 2015, 11:16 a.m. UTC 
From: Ravi Babu <ravibabu@ti.com>

Use memalign() with ARCH_DMA_MINALIGN to allocate read buffers.
This is required because, flash drivers may use DMA for read operations
and may have to invalidate the buffer before read.

Signed-off-by: Ravi Babu <ravibabu@ti.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
---
 common/cmd_sf.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
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Patch

diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index aef8c2a5ea84..db84a78e1698 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -223,7 +223,7 @@  static int spi_flash_update(struct spi_flash *flash, u32 offset,
 
 	if (end - buf >= 200)
 		scale = (end - buf) / 100;
-	cmp_buf = malloc(flash->sector_size);
+	cmp_buf = memalign(ARCH_DMA_MINALIGN, flash->sector_size);
 	if (cmp_buf) {
 		ulong last_update = get_timer(0);
 
@@ -480,12 +480,12 @@  static int do_spi_flash_test(int argc, char * const argv[])
 	if (*argv[2] == 0 || *endp != 0)
 		return -1;
 
-	vbuf = malloc(len);
+	vbuf = memalign(ARCH_DMA_MINALIGN, len);
 	if (!vbuf) {
 		printf("Cannot allocate memory (%lu bytes)\n", len);
 		return 1;
 	}
-	buf = malloc(len);
+	buf = memalign(ARCH_DMA_MINALIGN, len);
 	if (!buf) {
 		free(vbuf);
 		printf("Cannot allocate memory (%lu bytes)\n", len);