[U-Boot] [PATCH v3] fat: Define MAX_CLUSTSIZE using CONFIG_FS_FAT_MAX_CLUSTSIZE
Siva Durga Prasad Paladugu
siva.durga.paladugu at xilinx.com
Mon May 26 15:48:37 CEST 2014
Define the MAX_CLUSTSIZE to default of 65536 only if
CONFIG_FS_FAT_MAX_CLUSTSIZE is not defined.
This option has been provided to save memory in some
memory constrained cases.
Signed-off-by: Siva Durga Prasad Paladugu <sivadur at xilinx.com>
---
Changes in v3:
-Used CONFIG_FS_FAT_MAX_CLUSTSIZE to define MAX_CLUSTSIZE
as per review comment.
Changes in v2:
-Defined CONFIG_FS_FAT_MAX_CLUSTSIZE and documented as
per review comment.
README | 6 ++++++
include/fat.h | 6 +++++-
2 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/README b/README
index 5f89552..2f2aba3 100644
--- a/README
+++ b/README
@@ -1613,6 +1613,12 @@ CBFS (Coreboot Filesystem) support
filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls
and cbfsload.
+- FAT(File Allocation Table) filesystem cluster size:
+ CONFIG_FS_FAT_MAX_CLUSTSIZE
+
+ Define the max cluster size for fat operations else
+ a default value of 65536 will be defined.
+
- Keyboard Support:
CONFIG_ISA_KEYBOARD
diff --git a/include/fat.h b/include/fat.h
index 81d9790..63cf787 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -18,7 +18,11 @@
#define VFAT_MAXSEQ 9 /* Up to 9 of 13 2-byte UTF-16 entries */
#define PREFETCH_BLOCKS 2
-#define MAX_CLUSTSIZE 65536
+#ifndef CONFIG_FS_FAT_MAX_CLUSTSIZE
+#define CONFIG_FS_FAT_MAX_CLUSTSIZE 65536
+#endif
+#define MAX_CLUSTSIZE CONFIG_FS_FAT_MAX_CLUSTSIZE
+
#define DIRENTSPERBLOCK (mydata->sect_size / sizeof(dir_entry))
#define DIRENTSPERCLUST ((mydata->clust_size * mydata->sect_size) / \
sizeof(dir_entry))
--
1.7.4
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