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# ====================================================================
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#
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#      common.cdl
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#
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#      HAL common configuration data
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#
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# ====================================================================
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## ####ECOSGPLCOPYRIGHTBEGIN####
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## -------------------------------------------
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## This file is part of eCos, the Embedded Configurable Operating System.
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## Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005 Free Software Foundation, Inc.
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##
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## eCos is free software; you can redistribute it and/or modify it under
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## the terms of the GNU General Public License as published by the Free
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## Software Foundation; either version 2 or (at your option) any later
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## version.
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##
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## eCos is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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## for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with eCos; if not, write to the Free Software Foundation, Inc.,
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## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
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##
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## As a special exception, if other files instantiate templates or use
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## macros or inline functions from this file, or you compile this file
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## and link it with other works to produce a work based on this file,
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## this file does not by itself cause the resulting work to be covered by
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## the GNU General Public License. However the source code for this file
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## must still be made available in accordance with section (3) of the GNU
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## General Public License v2.
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##
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## This exception does not invalidate any other reasons why a work based
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## on this file might be covered by the GNU General Public License.
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## -------------------------------------------
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## ####ECOSGPLCOPYRIGHTEND####
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# ====================================================================
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######DESCRIPTIONBEGIN####
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#
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# Author(s):      jskov
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# Original data:  nickg,jskov,jlarmour
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# Contributors:
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# Date:           1999-07-02
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#
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#####DESCRIPTIONEND####
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#
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# ====================================================================
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cdl_option CYGFUN_HAL_COMMON_KERNEL_SUPPORT {
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    display       "Provide eCos kernel support"
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    requires      CYGPKG_KERNEL
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    default_value CYGPKG_KERNEL
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    description   "
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        The HAL can be configured to either support the full eCos
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        kernel, or to support only very simple applications which do
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        not require a full kernel. If kernel support is not required
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        then some of the startup, exception, and interrupt handling
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        code can be eliminated."
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}
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# NOTE: The requirement for kernel exception support is bogus in that
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# the user can supply a deliver_exception function herself. In that
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# case, however, it is easy to force the kernel option off while leaving
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# this one on.  Having the requirement prevents accidental invalid
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# configurations of the kernel.
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cdl_option CYGPKG_HAL_EXCEPTIONS {
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    display       "HAL exception support"
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    requires      CYGPKG_KERNEL_EXCEPTIONS
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    default_value CYGPKG_KERNEL_EXCEPTIONS
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    description   "
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        When a processor exception occurs, for example an attempt to
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        execute an illegal instruction or to perform a divide by
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        zero, this exception may be handled in a number of different
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        ways. If the target system has gdb support then typically
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        the exception will be handled by gdb code. Otherwise if the
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        HAL exception support is enabled then the HAL will invoke a
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        routine deliver_exception(). Typically this routine will be
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        provided by the eCos kernel, but it is possible for
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        application code to provide its own implementation. If the
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        HAL exception support is not enabled and a processor
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        exception occurs then the behaviour of the system is
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        undefined."
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}
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cdl_option CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG {
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    display       "Stop calling constructors early"
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    requires      CYGSEM_LIBC_INVOKE_DEFAULT_STATIC_CONSTRUCTORS
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    default_value 0
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    description   "
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        This option supports environments where some constructors
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        must be run in the context of a thread rather than at
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        simple system startup time. A boolean flag named
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        cyg_hal_stop_constructors is set to 1 when constructors
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        should no longer be invoked. It is up to some other
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        package to deal with the rest of the constructors.
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        In the current version this is only possible with the
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        C library."
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}
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cdl_interface CYGINT_HAL_SUPPORTS_MMU_TABLES {
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    display   "HAL uses the MMU and allows for CDL manipulation of it's use"
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}
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cdl_option CYGSEM_HAL_INSTALL_MMU_TABLES {
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    display        "Install MMU tables."
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    default_value  { CYG_HAL_STARTUP != "RAM" }
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    active_if      CYGINT_HAL_SUPPORTS_MMU_TABLES
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    description    "This option controls whether this application installs
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       its own Memory Management Unit (MMU) tables, or relies on the
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       existing environment to run."
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}
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cdl_option CYGSEM_HAL_STATIC_MMU_TABLES {
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    display        "Use static MMU tables."
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    default_value  0
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    requires       CYGSEM_HAL_INSTALL_MMU_TABLES
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    description "This option defines an environment where any Memory
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       Management Unit (MMU) tables are constant.  Normally used by ROM
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       based environments, this provides a way to save RAM usage which
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       would otherwise be required for these tables."
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}
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cdl_component CYGDBG_HAL_DIAG_TO_DEBUG_CHAN {
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    display       "Route diagnostic output to debug channel"
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    default_value { (CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS \
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                     || CYG_HAL_STARTUP == "RAM") ? 1 : 0}
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    active_if     !CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE
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    active_if     { CYGPKG_HAL_ARM || CYGPKG_HAL_POWERPC_MPC8xx \
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                    || CYGPKG_HAL_V85X_V850 || CYGSEM_HAL_VIRTUAL_VECTOR_DIAG }
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    description   "
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        If not inheriting the console setup from the ROM monitor,
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        it is possible to redirect diagnostic output to the debug
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        channel by enabling this option. Depending on the debugger
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        used it may also be necessary to select a mangler for the
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        output to be displayed by the debugger."
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    cdl_option CYGSEM_HAL_DIAG_MANGLER {
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        display       "Mangler used on diag output"
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        flavor        data
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        legal_values  {"GDB" "None"}
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        default_value { "GDB" }
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        description   "
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            It is sometimes necessary to mangle (encode) the
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            diag ASCII text output in order for it to show up at the
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            other end. In particular, GDB may silently ignore raw
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            ASCII text."
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    }
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}
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cdl_component CYGBLD_HAL_LINKER_GROUPED_LIBS {
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    display       "Grouped libraries for linking"
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    flavor        data
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    default_value CYGBLD_HAL_LINKER_GROUPED_LIBS_DEFAULT
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    requires      { is_substr(CYGBLD_HAL_LINKER_GROUPED_LIBS, "libtarget.a") }
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    description   "
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                This option provides a list of libraries used to satisfy
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                linker dependencies, but necessary for building eCos. It is passed
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                to a GROUP() directive in the linker script, which is analogous
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                to using the \"-(\" aka \"--start-group\", and \"-)\" aka
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                \"--end-group\" options on the linker command line.
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                It provides a similar function to adding \"-llibname\" to the
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                linker, but with the added feature that each library in the group
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                is scanned in turn for unresolved symbols, and this process is
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                repeated until there are no more unresolved symbols. This is important
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                for system libraries as there are often mutual dependencies.
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                This option should not be used for adding application specific
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                libraries. That should be done in the application's own makefile
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                or link line.
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                Users wishing to use the GNU Compiler prior to GCC 3.0 will
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                need to remove libsupc++.a from this option.
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                Note that libtarget.a is always required to build eCos."
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    cdl_option CYGBLD_HAL_LINKER_GROUPED_LIBS_DEFAULT {
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        display       "Default setting"
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        flavor        data
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        default_value { "libtarget.a libgcc.a libsupc++.a" }
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        description   "
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                This option is intended to be used by other eCos packages (including
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                HAL packages) to provide a different default value for
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                CYGBLD_HAL_LINKER_GROUPED_LIBS.
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                This is separated into its own option to continue to
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                allow the user to make customisations to the grouped library
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                list."
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    }
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}
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# EOF common.cdl

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