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fat: Define MAX_CLUSTSIZE using CONFIG_FS_FAT_MAX_CLUSTSIZE

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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@xilinx.com>
Acked-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Siva Durga Prasad Paladugu 2014-05-26 19:18:37 +05:30 committed by Tom Rini
parent 9cd73bf859
commit 4f0d1a2aea
2 changed files with 11 additions and 1 deletions
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6
README
View file

@ -1637,6 +1637,12 @@ 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

6
include/fat.h
View file

@ -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))