From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Nelson Date: Sun, 4 Mar 2012 14:46:20 -0700 Subject: [U-Boot] [PATCH V2] fs/fat: align disk buffers on cache line to enable DMA and cache In-Reply-To: <119311> References: <119311> Message-ID: <1330897580-8931-1-git-send-email-eric.nelson@boundarydevices.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Signed-off-by: Eric Nelson Acked-by: Mike Frysinger --- fs/fat/fat.c | 14 ++++++++------ 1 files changed, 8 insertions(+), 6 deletions(-) diff --git a/fs/fat/fat.c b/fs/fat/fat.c index 1f95eb4..f3c48bb 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -31,6 +31,8 @@ #include #include #include +#include +#include /* * Convert a string to lowercase. @@ -62,7 +64,7 @@ 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; @@ -293,7 +295,7 @@ get_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer, return -1; } if (size % mydata->sect_size) { - __u8 tmpbuf[mydata->sect_size]; + ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size); idx = size / mydata->sect_size; ret = disk_read(startsect + idx, 1, tmpbuf); @@ -428,8 +430,8 @@ static int slot2str (dir_slot *slotptr, char *l_name, int *idx) * into 'retdent' * Return 0 on success, -1 otherwise. */ -__attribute__ ((__aligned__ (__alignof__ (dir_entry)))) -__u8 get_vfatname_block[MAX_CLUSTSIZE]; +__u8 get_vfatname_block[MAX_CLUSTSIZE] + __aligned(ARCH_DMA_MINALIGN); static int get_vfatname (fsdata *mydata, int curclust, __u8 *cluster, @@ -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; @@ -828,7 +830,7 @@ do_fat_read (const char *filename, void *buffer, unsigned long maxsize, } mydata->fatbufnum = -1; - mydata->fatbuf = malloc(FATBUFSIZE); + mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE); if (mydata->fatbuf == NULL) { debug("Error: allocating memory\n"); return -1; -- 1.7.9