1 files changed, 41 insertions, 0 deletions
diff --git a/filesystem/dfs/include/dfs_cache.h b/filesystem/dfs/include/dfs_cache.h
new file mode 100644
index 0000000000..4321664e23
--- /dev/null
+++ b/filesystem/dfs/include/dfs_cache.h
@@ -0,0 +1,41 @@
+#ifndef __DFS_CACHE_H__
+#define __DFS_CACHE_H__
+
+#include <rtthread.h>
+
+#define IOMAN_STATUS_ATTR_VALIDDATA  0
+#define IOMAN_STATUS_ATTR_USERBUFFER 1
+#define IOMAN_STATUS_ATTR_WRITE      2
+
+#define IOM_MODE_READONLY  1
+#define IOM_MODE_READWRITE 2
+#define IOM_MODE_EXP_REQ   4
+
+#define DFS_SECTOR_SIZE     512
+
+struct _IOManager
+{
+	rt_device_t device;
+	rt_uint8_t  numbuf;
+	
+    rt_uint32_t sector[DFS_CACHE_MAX_NUM];
+	rt_uint8_t  status[DFS_CACHE_MAX_NUM];
+	rt_uint8_t  usage [DFS_CACHE_MAX_NUM];
+
+    /* cache FIFO */
+    rt_uint8_t  ring_fifo[DFS_CACHE_MAX_NUM];
+
+    /* cache buffer */
+    rt_uint8_t  cache[DFS_CACHE_MAX_NUM][DFS_SECTOR_SIZE];
+};
+typedef struct _IOManager IOManager;
+
+rt_err_t ioman_init(IOManager* ioman);
+rt_uint8_t* ioman_getSector(IOManager *ioman, rt_uint32_t address, rt_uint8_t mode);
+rt_err_t ioman_releaseSector(IOManager *ioman, rt_uint8_t* buf);
+rt_err_t ioman_flushRange(IOManager *ioman, rt_uint32_t address_low, rt_uint32_t address_high);
+
+rt_err_t ioman_directSectorRead(IOManager *ioman, rt_uint32_t address, rt_uint8_t* buf, rt_uint32_t numsector);
+rt_err_t ioman_directSectorWrite(IOManager *ioman, rt_uint32_t address, rt_uint8_t* buf, rt_uint32_t numsector);
+
+#endif