ramfs.cdl

eCos操作系统源码

# ====================================================================
#
#      ramfs.cdl
#
#      RAM Filesystem configuration data
#
# ====================================================================
#####ECOSGPLCOPYRIGHTBEGIN####
## -------------------------------------------
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## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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# ====================================================================
######DESCRIPTIONBEGIN####
#
# Author(s):      nickg
# Original data:  nickg
# Contributors:
# Date:           2000-08-01
#
#####DESCRIPTIONEND####
#
# ====================================================================

cdl_package CYGPKG_FS_RAM {
    display        "RAM filesystem"
    doc            ref/fileio.html
    include_dir    cyg/ramfs

    requires       CYGPKG_IO_FILEIO

    requires       CYGPKG_ISOINFRA
    requires       CYGPKG_ERROR
    requires       CYGINT_ISO_ERRNO
    requires       CYGINT_ISO_ERRNO_CODES

    implements     CYGINT_IO_FILEIO_FS

    compile        -library=libextras.a ramfs.c

    # ----------------------------------------------------------------------
    # Simple allocation mechanism using malloc()
    
    cdl_component CYGPKG_FS_RAM_SIMPLE {
	display    "Simple, malloc() based, implementation"
	requires   { CYGINT_ISO_MALLOC != 0 }
	default_value 1
	active_if      !CYGPKG_FS_RAM_BLOCKS

	cdl_option     CYGNUM_RAMFS_REALLOC_INCREMENT {
	    display       "Size of file data storage increment"
	    flavor        data
	    default_value 256
	    legal_values  64 to 32768
	    description   "This option controls the size of the increment to a file data
	                   storage block."
	}

    }

    # ----------------------------------------------------------------------
    # Block based allocation, using either malloc() or a private block
    # pool.
    
    cdl_component CYGPKG_FS_RAM_BLOCKS {
	display        "Block-based RAM filesystem allocation"
	default_value  0
	active_if      !CYGPKG_FS_RAM_SIMPLE

	
	cdl_option     CYGNUM_RAMFS_BLOCK_SIZE {
	    display       "Size of file data storage block"
	    flavor        data
	    default_value 256
	    legal_values  64 to 32768
	    description   "This option controls the size of a data storage block."
	}

	cdl_option     CYGNUM_RAMFS_BLOCKS_DIRECT {
	    display       "Directly referenced data storage blocks"
	    flavor        data
	    default_value 8
	    legal_values  0 to 32
	    description   "This option controls the number of data storage blocks that
	                   are referenced directly from a file or directory node."
	}

	cdl_option     CYGNUM_RAMFS_BLOCKS_INDIRECT1 {
	    display       "Single level indirect data storage blocks"
	    flavor        data
	    default_value 1
	    legal_values  0 to 32
	    description   "This option controls the number of single level indirect storage
	                   blocks that are referenced from a file or directory node."
	}

	cdl_option     CYGNUM_RAMFS_BLOCKS_INDIRECT2 {
	    display       "Two level indirect data storage blocks"
	    flavor        data
	    default_value 1
	    legal_values  0 to 32
	    description   "This option controls the number of two level indirect storage
	                   blocks that are referenced from a file or directory node."
	}

	cdl_component CYGPKG_FS_RAM_BLOCKS_ARRAY {
	    display       "Use block array rather than malloc()"
	    default_value 0
	    description   "This option controls whether the blocks are allocated from
	                   an array of blocks rather from the heap using malloc()."

	    cdl_option CYGPKG_FS_RAM_BLOCKS_ARRAY_EXTERN {
		display         "Block array is external"
		default_value 0
		description     "This option controls whether the block array is
		                 defined by the RAMFS package or whether it is provided
		                 by an external component. The latter option may be
		                 useful when the RAM file system is to be put into a
		                 special memory area."
	    }

	    cdl_option CYGPKG_FS_RAM_BLOCKS_ARRAY_NAME {
		display         "Name of external block array"
		active_if       CYGPKG_FS_RAM_BLOCKS_ARRAY_EXTERN
		flavor          data
		default_value   "cyg_ramfs_block_array"
		description     "This option controls what the symbol name of the external
		                 block array will be."
	    }

	    cdl_option CYGNUM_FS_RAM_BLOCKS_ARRAY_SIZE {
		display         "Size of blocks array"
		flavor          data
		default_value   128
		legal_values    1 to 9999999999
		description     "The number of blocks in the array. The total size of
		                 the array will be this value times the block size."
	    }
	}
    }

    cdl_option     CYGNUM_RAMFS_DIRENT_SIZE {
	display       "Directory entry size"
	flavor        data
	default_value 32
	legal_values  16 to { CYGNUM_RAMFS_BLOCK_SIZE ? CYGNUM_RAMFS_BLOCK_SIZE : 128 }
	description   "This option controls the number of two level indirect storage
                       blocks that are referenced from a file or directory node."
    }

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

    cdl_option CYGPKG_FS_RAM_TESTS {
	display "RAM FS tests"
	flavor  data
	no_define
	calculated { "tests/fileio1.c tests/fseek1.c" }
            description   "
                This option specifies the set of tests for the RAM FS package."
        }
    
}

# End of ramfs.cdl