Merge branch 'master' of git://www.denx.de/git/u-boot-cfi-flash

[karo-tx-uboot.git] / include / fat.h

diff --git a/include/fat.h b/include/fat.h
index 0645458f17b3925c352dad3232951b8fec1677f1..59de3fbec55bd434798e8906b73ba798879529cb 100644 (file)
--- a/include/fat.h
+++ b/include/fat.h
@@ -101,7 +101,7 @@
 #else
 #define FAT2CPU16(x)   ((((x) & 0x00ff) << 8) | (((x) & 0xff00) >> 8))
 #define FAT2CPU32(x)   ((((x) & 0x000000ff) << 24)  |  \
-                        (((x) & 0x0000ff00) << 8)  |   \
+                        (((x) & 0x0000ff00) << 8)  |   \
                         (((x) & 0x00ff0000) >> 8)  |   \
                         (((x) & 0xff000000) >> 24))
 #endif
@@ -111,7 +111,8 @@
 #define START(dent)    (FAT2CPU16((dent)->start) \
                        + (mydata->fatsize != 32 ? 0 : \
                          (FAT2CPU16((dent)->starthi) << 16)))
-
+#define CHECK_CLUST(x, fatsize) ((x) <= 1 || \
+                               (x) >= ((fatsize) != 32 ? 0xfff0 : 0xffffff0))
 
 typedef struct boot_sector {
        __u8    ignored[3];     /* Bootstrap code */
@@ -175,15 +176,19 @@ typedef struct dir_slot {
        __u8    name11_12[4];   /* Last 2 characters in name */
 } dir_slot;
 
-/* Private filesystem parameters */
+/* Private filesystem parameters
+ *
+ * Note: FAT buffer has to be 32 bit aligned
+ * (see FAT32 accesses)
+ */
 typedef struct {
+       __u8    fatbuf[FATBUFSIZE]; /* Current FAT buffer */
        int     fatsize;        /* Size of FAT in bits */
        __u16   fatlength;      /* Length of FAT in sectors */
        __u16   fat_sect;       /* Starting sector of the FAT */
        __u16   rootdir_sect;   /* Start sector of root directory */
        __u16   clust_size;     /* Size of clusters in sectors */
        short   data_begin;     /* The sector of the first cluster, can be negative */
-       __u8    fatbuf[FATBUFSIZE]; /* Current FAT buffer */
        int     fatbufnum;      /* Used by get_fatent, init to -1 */
 } fsdata;