commit b1fe4068b9fec15a792524ccb95d5ebf41ee9d5e
author Channagoud Kadabi <ckadabi@codeaurora.org> Fri Aug 07 16:08:44 2015 -0700
committer Gerrit - the friendly Code Review server <code-review@localhost> Thu Aug 20 13:37:32 2015 -0700
tree 16390ecf5bc9c7976372c37a3bfb042012b6a8f4
parent cf3afe4722d6f0146fe1d69ca2c508df2cffc5c7

app: aboot: Align DMA buffers to cacheline

DMA buffers must be aligned to cacheline to prevent dirty data from
being evicted due to cache invalidate calls.

Change-Id: I8f2d8ccffd077682f8e816b2bebac40c75c1beb5

app/aboot/aboot.c

diff --git a/app/aboot/aboot.c b/app/aboot/aboot.c
index 575e8e4..045c189 100644
--- a/app/aboot/aboot.c
+++ b/app/aboot/aboot.c
@@ -1596,7 +1596,7 @@
 	unsigned long long ptn;
 	unsigned long long ptn_size;
 	unsigned blocksize = mmc_get_device_blocksize();
-	char buf[blocksize];
+	STACKBUF_DMA_ALIGN(buf, blocksize);
 
 	index = partition_get_index(frp_ptns[0]);
 	if (index == INVALID_PTN)
@@ -1613,7 +1613,7 @@
 	ptn_size = partition_get_size(index);
 	offset = ptn_size - blocksize;
 
-	if (mmc_read(ptn + offset, (void *)buf, sizeof(buf)))
+	if (mmc_read(ptn + offset, (void *)buf, blocksize))
 	{
 		dprintf(CRITICAL, "Reading MMC failed\n");
 		return -1;
@@ -1631,7 +1631,7 @@
 	unsigned long long ptn;
 	unsigned long long ptn_size;
 	unsigned blocksize = mmc_get_device_blocksize();
-	char buf[blocksize];
+	STACKBUF_DMA_ALIGN(buf, blocksize);
 
 	index = partition_get_index(frp_ptns[0]);
 	if (index == INVALID_PTN)
@@ -1648,7 +1648,7 @@
 	ptn_size = partition_get_size(index);
 	offset = ptn_size - blocksize;
 
-	if (mmc_read(ptn + offset, (void *)buf, sizeof(buf)))
+	if (mmc_read(ptn + offset, (void *)buf, blocksize))
 	{
 		dprintf(CRITICAL, "Reading MMC failed\n");
 		return -1;