jffs2.cdl

老版本的mtd-snap

# ====================================================================
#
#      jffs2.cdl
#
#      JFFS2 Filesystem configuration data
#
#      $Id: jffs2.cdl,v 1.20 2005/07/30 15:25:45 lunn Exp $
#
# ====================================================================
#####ECOSGPLCOPYRIGHTBEGIN####
## -------------------------------------------
## This file is part of eCos, the Embedded Configurable Operating System.
## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
## Copyright (C) 2004 eCosCentric Limited
##
## eCos is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free
## Software Foundation; either version 2 or (at your option) any later version.
##
## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
## WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
## for more details.
##
## You should have received a copy of the GNU General Public License along
## with eCos; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
##
## As a special exception, if other files instantiate templates or use macros
## or inline functions from this file, or you compile this file and link it
## with other works to produce a work based on this file, this file does not
## by itself cause the resulting work to be covered by the GNU General Public
## License. However the source code for this file must still be made available
## in accordance with section (3) of the GNU General Public License.
##
## This exception does not invalidate any other reasons why a work based on
## this file might be covered by the GNU General Public License.
##
## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
## at http://sources.redhat.com/ecos/ecos-license/
## -------------------------------------------
#####ECOSGPLCOPYRIGHTEND####
# ====================================================================
######DESCRIPTIONBEGIN####
#
# Author(s):      David Woodhouse, Dominic Ostrowski
# Original data:  ported from JFFS2 by David Woodhouse
# Contributors:   [e-mail]
# Date:           2000-08-28
#
#####DESCRIPTIONEND####
#
# ====================================================================

cdl_package CYGPKG_FS_JFFS2 {
    display        "JFFS2 filesystem"
    doc            ref/fileio.html
    include_dir    ""

    requires       CYGPKG_IO_FILEIO
    requires       CYGPKG_IO_FLASH
    requires       CYGINT_ISO_MALLOC

    requires       CYGPKG_ISOINFRA
    requires       CYGPKG_ERROR
    requires       CYGINT_ISO_ERRNO
    requires       CYGINT_ISO_ERRNO_CODES
    requires       CYGPKG_IO_FLASH_BLOCK_DEVICE
    requires       CYGPKG_IO_FILEIO_INODE
    requires       CYGPKG_LINUX_COMPAT
    requires       CYGPKG_CRC

    implements     CYGINT_IO_FILEIO_FS      

    compile        -library=libextras.a fs-ecos.c
    compile        build.c scan.c malloc-ecos.c nodelist.c nodemgmt.c readinode.c dir-ecos.c read.c compr.c debug.c
    # This could be overridden by an alternative direct I/O method.
    compile        flashio.c

    cdl_component CYGOPT_FS_JFFS2_GCTHREAD {
	display         "Support garbage-collection background thread"
	flavor          bool
        default_value   0
	compile         gcthread.c
 	requires        CYGPKG_KERNEL
        description     "
            Enable background garbage collection thread, for making 
	    free space ahead of time. Leave this off till it's been 
	   implemented. And don't implement it till icache locking has
	 been made thread-safe.
	"	


        cdl_option CYGNUM_JFFS2_GC_THREAD_PRIORITY {
            display "jffs2 gc thread priority"
            flavor data
            default_value { CYGNUM_KERNEL_SCHED_PRIORITIES-2 }
            legal_values 0 to CYGNUM_KERNEL_SCHED_PRIORITIES
            description "The jffs2 system contains one garbage collect thread."
        }

        cdl_option CYGNUM_JFFS2_GC_THREAD_STACK_SIZE {
            display        "jffs2 gc stackstack size"
            flavor         data
            legal_values   2048 to 0x7fffffff
            default_value  8192
            description    "
                This option sets the size of the stack used
                for jffs2 garbage collect thread"
        }
        
        cdl_option CYGNUM_JFFS2_GS_THREAD_TICKS {
            display       "ticks between each garbage collect"
            flavor        data
            default_value 100
            description   "
                This option sets how many clock ticks there will be between
                each garbage collect operation triggered by the background
                thread"
        }    
    }

    cdl_option CYGOPT_FS_JFFS2_WRITE {
	display         "Include write support for JFFS2"
	flavor          bool
	compile		gc.c write.c erase.c
	default_value   1
        description     "
            Enable writing to JFFS2 file systems; not only reading."
    }

    cdl_option CYGOPT_FS_JFFS2_NAND {
	display         "Support for NAND flash"
	flavor          bool
	define          CONFIG_JFFS2_FS_WRITEBUFFER
	compile         wbuf.c
        requires        0
        description     "
            Enable support for JFFS2 on NAND flash."
    }

    cdl_option CYGOPT_FS_JFFS2_DEBUG {
	display         "Debug level"
	flavor          data
        default_value   0
        legal_values    0 to 2
	define          CONFIG_JFFS2_FS_DEBUG
        description     "
            Debug verbosity of JFFS2 code. Zero is normal operation
            without debugging. Level 1 adds extra sanity checks and
            fairly verbose output. Level 2 is insanely loquacious."
    }

    cdl_component CYGOPT_FS_JFFS2_COMPRESS {
        display         "Compress data"
        flavor          bool
        define          JFFS2_COMPRESSION
        default_value   1
        description     "
            Compression and decompression are entirely handled by the file
            system and are fully transparent to applications. However,
            selecting this option increases the amount of RAM required and
            slows down read and write operations considerably if you have a
            slow CPU."

        cdl_option CYGOPT_FS_JFFS2_COMPRESS_ZLIB {
            display         "Compress data using zlib"
            flavor          bool
            define          CONFIG_JFFS2_ZLIB
            requires        CYGPKG_COMPRESS_ZLIB
            compile         compr_zlib.c
            default_value   1
            description     "
                Use zlib for compression of data. This is the slowest of the
                compression options available but the most effective."
        }

        cdl_option CYGOPT_FS_JFFS2_COMPRESS_RTIME {
            display         "Compress data using rtime"
            flavor          bool
            define          CONFIG_JFFS2_RTIME
            compile         compr_rtime.c
            default_value   1
            description     "
                Use the rtime algorithm for compression of data. This 
                simple algorithm often manages to squeeze and extra few
                bytes from data already compressed with gzip."
        }

        cdl_option CYGOPT_FS_JFFS2_COMPRESS_RUBIN {
            display         "Compress data using rubin"
            flavor          bool
            define          CONFIG_JFFS2_RUBIN
            requires        CYGOPT_FS_JFFS2_COMPRESS
            compile         compr_rubin.c
            description     "
                Use the rubin algorithm for compression of data. This 
                simple algorithm is faster than zlib but not quite as
                effective."
        }
        cdl_option CYGOPT_FS_JFFS2_COMPRESS_CMODE {
            display         "Set the default compression mode"
            flavor          data
            default_value   { "PRIORITY" }
            legal_values    { "NONE" "PRIORITY" "SIZE" }
            define          CONFIG_JFFS2_CMODE
            description     "
                You can set here the default compression mode of JFFS2 from 
                the avaiable compression modes. NONE causes no compression to
                be performed. PRIORITY tries the compressors in a predefined
                order and chooses the first successfull one. SIZE tries all 
                compressors and chooses the one which has the smallest result"
        }
    }
    cdl_option CYGNUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE {
        display         "Memory pool size"
        flavor          data
        default_value   0
        description     "
            In order to manage data stored in flash, the file system
            needs to use data structures (jffs2_raw_node_ref) allocated
            in RAM. You can specify here the maximum number of such
            structures you expect to be used, which will then be allocated
            statically. If this option is set to 0, the structures will
            be allocated dynamically via malloc(), which may incur some
            memory overhead depending on the particular malloc()
            implementation used."
    }

    cdl_option CYGPKG_FS_JFFS2_CFLAGS_ADD {
	display "Additional compiler flags"
	flavor  data
	no_define
	# We add '-D__ECOS' to trigger eCos-specific code in places.
	# We add '-nostdinc -iwithprefix include' to avoid picking up
	#    native <linux/*.h> include files when building on Linux.
	default_value { "-D__ECOS -nostdinc -iwithprefix include" }
	description   "
	    This option modifies the set of compiler flags for
            building the JFFS2 package.
            These flags are used in addition
            to the set of global flags."
        }

     cdl_option CYGPKG_FS_JFFS2_CFLAGS_REMOVE {
         display "Suppressed compiler flags"
         flavor  data
         no_define
         default_value { "" }
         description   "
             This option modifies the set of compiler flags for
             building the JFFS2 package. These flags are removed from
             the set of global flags if present."
     }

    # ----------------------------------------------------------------
    # Tests

    cdl_option CYGPKG_FS_JFFS2_TESTS {
	display "JFFS2 FS tests"
	flavor  data
	no_define
	calculated { "tests/jffs2_1 tests/jffs2_2 tests/jffs2_3" }
            description   "
                This option specifies the set of tests for the JFFS2    
                FS package."
        }
    
}

# End of jffs2.cdl