On 09.04.2012 08:45, Marek Vasut wrote:
Align the FAT FS buffers so DMA on various systems can directly pick them.
Just fyi:
http://lists.denx.de/pipermail/u-boot/2012-March/119311.html
http://lists.denx.de/pipermail/u-boot/2012-March/119309.html
Best regards
Dirk
Signed-off-by: Marek Vasut<ma...@denx.de>
---
fs/fat/fat.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 1f95eb4..d709e59 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -31,6 +31,7 @@
#include<fat.h>
#include<asm/byteorder.h>
#include<part.h>
+#include<malloc.h>
/*
* Convert a string to lowercase.
@@ -62,7 +63,7 @@ static int disk_read(__u32 block, __u32 nr_blocks, void *buf)
int fat_register_device (block_dev_desc_t * dev_desc, int part_no)
{
- unsigned char buffer[dev_desc->blksz];
+ ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
/* First close any currently found FAT filesystem */
cur_dev = NULL;
@@ -293,9 +294,10 @@ get_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer,
return -1;
}
if (size % mydata->sect_size) {
- __u8 tmpbuf[mydata->sect_size];
+ ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf,
mydata->sect_size);
idx = size / mydata->sect_size;
+
ret = disk_read(startsect + idx, 1, tmpbuf);
if (ret != 1) {
debug("Error reading data (got %d)\n", ret);
@@ -709,7 +711,7 @@ read_bootsectandvi (boot_sector *bs, volume_info *volinfo,
int *fatsize)
return -1;
}
- block = malloc(cur_dev->blksz);
+ block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz);
if (block == NULL) {
debug("Error: allocating block\n");
return -1;
@@ -765,9 +767,6 @@ exit:
return ret;
}
-__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
-__u8 do_fat_read_block[MAX_CLUSTSIZE];
-
long
do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
int dols)
@@ -788,6 +787,7 @@ do_fat_read (const char *filename, void *buffer, unsigned
long maxsize,
__u32 root_cluster = 0;
int rootdir_size = 0;
int j;
+ uint8_t do_fat_read_block[MAX_CLUSTSIZE] __attribute__((aligned(32)));
if (read_bootsectandvi(&bs,&volinfo,&mydata->fatsize)) {
debug("Error: reading boot sector\n");
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