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# ====================================================================

#

#      ramfs.cdl

#

#      RAM Filesystem configuration data

#

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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

    parent         CYGPKG_IO_FILEIO

    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

    requires       CYGINT_FS_RAM_ALLOC == 1

    cdl_interface  CYGINT_FS_RAM_ALLOC {

        display       "Functions to allocate RAM"

        description   "

            This interface is implemented by functions

            which allocate RAM to hold the contents of the files"

    }

    # ----------------------------------------------------------------------

    # 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

        implements CYGINT_FS_RAM_ALLOC

        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

        implements CYGINT_FS_RAM_ALLOC

        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."

    }

    cdl_option     CYGPKG_FS_RAM_RET_DIRENT_DTYPE {

        display       "Support for fileio's struct dirent d_type field"

        flavor        bool

        default_value 0

        active_if     CYGPKG_FILEIO_DIRENT_DTYPE

        description   "This option controls whether the RAM filesystem supports

                       setting fileio's struct dirent d_type field.

                       If this option is enabled, d_type will be set.

                       Otherwise, nothing will be done, d_type's value will

                       be zero because fileio already sets it."

    }

    # ----------------------------------------------------------------

    # Tests

    cdl_option CYGPKG_FS_RAM_TESTS {

        display "RAM FS tests"

        flavor  data

        no_define

        calculated { "tests/ramfs1 tests/ramfs2 tests/ramfs3" }

            description   "

                This option specifies the set of tests for the RAM FS package."

        }

}

# End of ramfs.cdl