if the D-cache is enabled, make sure the buffer used by DMA is aligned to 32 bytes

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1945 bbd45198-f89e-11dd-88c7-29a3b14d5316

1 files changed, 48 insertions, 23 deletions

diff --git a/components/drivers/sdio/block_dev.c b/components/drivers/sdio/block_dev.c
index ee62dab71e..87bd2a1f91 100644
--- a/components/drivers/sdio/block_dev.c
+++ b/components/drivers/sdio/block_dev.c
@@ -21,11 +21,12 @@
 
 static rt_list_t blk_devices;
 
-struct mmcsd_blk_device {
+struct mmcsd_blk_device
+{
 	struct rt_mmcsd_card *card;
-	rt_list_t  list;
-	struct rt_device   dev;
-	struct dfs_partition  part;
+	rt_list_t list;
+	struct rt_device dev;
+	struct dfs_partition part;
 	struct rt_device_blk_geometry geometry;
 };
 
@@ -96,6 +97,8 @@ static rt_int32_t mmcsd_num_wr_blocks(struct rt_mmcsd_card *card)
 
 static rt_err_t rt_mmcsd_req_blk(struct rt_mmcsd_card *card, rt_uint32_t sector, void *buf, rt_size_t blks, rt_uint8_t dir)
 {
+	void *aligned_buf;
+	
 	struct rt_mmcsd_cmd  cmd, stop;
 	struct rt_mmcsd_data  data;
 	struct rt_mmcsd_req  req;
@@ -152,7 +155,23 @@ static rt_err_t rt_mmcsd_req_blk(struct rt_mmcsd_card *card, rt_uint32_t sector,
 
 	mmcsd_set_data_timeout(&data, card);
 
-	data.buf = buf;
+	if (((rt_uint32_t)buf & (32 - 1)) != 0) /* the buf address is not aligned to 32 */
+	{
+		aligned_buf = rt_malloc_align(data.blks * data.blksize, 32);
+
+		if (aligned_buf == RT_NULL)
+		{
+			rt_kprintf("allocate memory failed\n");
+			return -RT_ENOMEM;
+		}
+	
+		if (dir)//write
+			rt_memcpy(aligned_buf, buf, data.blks*data.blksize);
+		
+		data.buf = aligned_buf;
+	}
+	else
+		data.buf = buf;
 
 	mmcsd_send_request(host, &req);
 
@@ -178,7 +197,6 @@ static rt_err_t rt_mmcsd_req_blk(struct rt_mmcsd_card *card, rt_uint32_t sector,
 			 */
 		 } while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
 			(R1_CURRENT_STATE(cmd.resp[0]) == 7));
-
 	}
 
 	mmcsd_host_unlock(host);
@@ -187,9 +205,20 @@ static rt_err_t rt_mmcsd_req_blk(struct rt_mmcsd_card *card, rt_uint32_t sector,
 	{
 		rt_kprintf("mmcsd request blocks error\n");
 		rt_kprintf("%d,%d,%d, 0x%08x,0x%08x\n", cmd.err, data.err, stop.err, data.flags, sector);
+
+		if (((rt_uint32_t)buf & (32 - 1)) != 0)
+			rt_free_align(aligned_buf);
+
 		return -RT_ERROR;
 	}
 
+	if (((rt_uint32_t)buf & (32 - 1)) != 0)
+	{
+		if (!dir)//read
+			rt_memcpy(buf, data.buf, data.blks*data.blksize);
+		rt_free_align(aligned_buf);
+	}
+
 	return RT_EOK;
 }
 
@@ -213,15 +242,16 @@ static rt_err_t rt_mmcsd_control(rt_device_t dev, rt_uint8_t cmd, void *args)
 	struct mmcsd_blk_device *blk_dev = (struct mmcsd_blk_device *)dev->user_data;
 	switch (cmd)
 	{
-		case RT_DEVICE_CTRL_BLK_GETGEOME:
-			rt_memcpy(args, &blk_dev->geometry, sizeof(struct rt_device_blk_geometry));
-			break;
-		default: break;
+	case RT_DEVICE_CTRL_BLK_GETGEOME:
+		rt_memcpy(args, &blk_dev->geometry, sizeof(struct rt_device_blk_geometry));
+		break;
+	default:
+		break;
 	}
 	return RT_EOK;
 }
 
-static rt_size_t rt_mmcsd_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
+static rt_size_t rt_mmcsd_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
 {
 	rt_err_t err;
 	struct mmcsd_blk_device *blk_dev = (struct mmcsd_blk_device *)dev->user_data;
@@ -246,13 +276,13 @@ static rt_size_t rt_mmcsd_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_s
 	return size;
 }
 
-static rt_size_t rt_mmcsd_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
+static rt_size_t rt_mmcsd_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
 {
 	rt_err_t err;
 	struct mmcsd_blk_device *blk_dev = (struct mmcsd_blk_device *)dev->user_data;
 	struct dfs_partition *part = &blk_dev->part;
 
-	if ( dev == RT_NULL )
+	if (dev == RT_NULL)
 	{
 		rt_set_errno(-DFS_STATUS_EINVAL);
 		return 0;
@@ -289,8 +319,7 @@ static rt_int32_t mmcsd_set_blksize(struct rt_mmcsd_card *card)
 
 	if (err) 
 	{
-		rt_kprintf("MMCSD: unable to set block size to %d: %d\n",
-			cmd.arg, err);
+		rt_kprintf("MMCSD: unable to set block size to %d: %d\n", cmd.arg, err);
 		return -RT_ERROR;
 	}
 
@@ -299,7 +328,7 @@ static rt_int32_t mmcsd_set_blksize(struct rt_mmcsd_card *card)
 
 rt_int32_t rt_mmcsd_blk_probe(struct rt_mmcsd_card *card)
 {
-	rt_int32_t  err = 0;
+	rt_int32_t err = 0;
 	rt_uint8_t i, status;
 	rt_uint8_t *sector;
 	char dname[4];
@@ -313,7 +342,7 @@ rt_int32_t rt_mmcsd_blk_probe(struct rt_mmcsd_card *card)
 	}
 
 	/* get the first sector to read partition table */
-	sector = (rt_uint8_t*) rt_malloc (SECTOR_SIZE);
+	sector = (rt_uint8_t *)rt_malloc_align(SECTOR_SIZE, 32);
 	if (sector == RT_NULL)
 	{
 		rt_kprintf("allocate partition sector buffer failed\n");
@@ -341,7 +370,7 @@ rt_int32_t rt_mmcsd_blk_probe(struct rt_mmcsd_card *card)
 				blk_dev->part.lock = rt_sem_create(sname, 1, RT_IPC_FLAG_FIFO);
 	
 				/* register mmcsd device */
-				blk_dev->dev.type  = RT_Device_Class_Block;					
+				blk_dev->dev.type = RT_Device_Class_Block;					
 				blk_dev->dev.init = rt_mmcsd_init;
 				blk_dev->dev.open = rt_mmcsd_open;
 				blk_dev->dev.close = rt_mmcsd_close;
@@ -415,11 +444,9 @@ rt_int32_t rt_mmcsd_blk_probe(struct rt_mmcsd_card *card)
 	}
 	
 	/* release sector buffer */
-	rt_free(sector);
+	rt_free_align(sector);
 	
 	return err;
-
-
 }
 
 void rt_mmcsd_blk_remove(struct rt_mmcsd_card *card)
@@ -439,8 +466,6 @@ void rt_mmcsd_blk_remove(struct rt_mmcsd_card *card)
 	}
 }
 
-
-
 void rt_mmcsd_blk_init(void)
 {
 	list_init(&blk_devices);