fs: zynq: Added FAT support for zynq u-boot on OCM

Modified the buffers and its sizes inorder to support
SD/MMC fat read  capability for u-bbot running from OCM

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 569d6e3ae7ff7da18231355b138f4a3d6d6ae0b7..6ed4dfef79d65b2375f1e8ac8a60c73e3d4ab823 100644 (file)
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -319,11 +319,15 @@ get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size)
  * into 'buffer'.
  * Return the number of bytes read or -1 on fatal errors.
  */
+#ifndef CONFIG_ZYNQ_OCM
 #if defined(CONFIG_ZYNQ) && defined(CONFIG_SPL_BUILD)
 __section(.ddr)
 #endif
 __u8 get_contents_vfatname_block[MAX_CLUSTSIZE]
        __aligned(ARCH_DMA_MINALIGN);
+#else
+__u8 *get_contents_vfatname_block = (__u8 *)FAT_BUFF_PTR_OCM;
+#endif
 
 static long
 get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
@@ -574,11 +578,13 @@ static __u8 mkcksum(const char name[8], const char ext[3])
  * Get the directory entry associated with 'filename' from the directory
  * starting at 'startsect'
  */
+#ifndef CONFIG_ZYNQ_OCM
 #if defined(CONFIG_ZYNQ) && defined(CONFIG_SPL_BUILD)
 __section(.ddr)
 #endif
 __u8 get_dentfromdir_block[MAX_CLUSTSIZE]
        __aligned(ARCH_DMA_MINALIGN);
+#endif
 
 static dir_entry *get_dentfromdir(fsdata *mydata, int startsect,
                                  char *filename, dir_entry *retdent,
@@ -587,6 +593,10 @@ static dir_entry *get_dentfromdir(fsdata *mydata, int startsect,
        __u16 prevcksum = 0xffff;
        __u32 curclust = START(retdent);
        int files = 0, dirs = 0;
+#ifdef CONFIG_ZYNQ_OCM
+       __u8 get_dentfromdir_block[MAX_CLUSTSIZE]
+               __aligned(ARCH_DMA_MINALIGN);
+#endif
 
        debug("get_dentfromdir: %s\n", filename);
 
@@ -809,11 +819,13 @@ exit:
        return ret;
 }
 
+#ifndef CONFIG_ZYNQ_OCM
 #if defined(CONFIG_ZYNQ) && defined(CONFIG_SPL_BUILD)
 __section(.ddr)
 #endif
 __u8 do_fat_read_at_block[MAX_CLUSTSIZE]
        __aligned(ARCH_DMA_MINALIGN);
+#endif
 
 long
 do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
@@ -835,6 +847,10 @@ do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
        __u32 root_cluster = 0;
        int rootdir_size = 0;
        int j;
+#ifdef CONFIG_ZYNQ_OCM
+       __u8 do_fat_read_at_block[MAX_CLUSTSIZE]
+                __aligned(ARCH_DMA_MINALIGN);
+#endif
 
        if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
                debug("Error: reading boot sector\n");