hal.cdl

eCos操作系统源码

# ====================================================================
#
#      hal.cdl
#
#      HAL configuration data
#
# ====================================================================
#####ECOSGPLCOPYRIGHTBEGIN####
## -------------------------------------------
## This file is part of eCos, the Embedded Configurable Operating System.
## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
## Copyright (C) 2002 Gary Thomas
##
## 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):      bartv
# Original data:  nickg,jskov,jlarmour
# Contributors:   dmoseley
# Date:           1999-06-13
#
#####DESCRIPTIONEND####
#
# ====================================================================

cdl_package CYGPKG_HAL {
    display       "eCos HAL"
    include_dir   cyg/hal
    description   "
        The eCos HAL package provide a porting layer for
        higher-level parts of the system such as the kernel and the
        C library. Each installation should have HAL packages for
        one or more architectures, and for each architecture there
        may be one or more supported platforms. It is necessary to
        select one target architecture and one platform for that
        architecture. There are also a number of configuration
        options that are common to all HAL packages."
    doc           ref/the-ecos-hardware-abstraction-layer.html

    compile       drv_api.c
    compile       -library=libextras.a dummy.c

    requires      CYGPKG_INFRA

    make -priority 250 {
        <PREFIX>/lib/extras.o: <PREFIX>/lib/libextras.a
        $(CC) $(CFLAGS) -nostdlib -Wl,-r -Wl,--whole-archive -o $@ $<
    }   


    cdl_component CYGPKG_HAL_COMMON {
        display       "Platform-independent HAL options"
        flavor        none
        description   "
            A number of configuration options are common to most or all
            HAL packages, for example options controlling how much state
            should be saved during a context switch. The implementations
            of these options will vary from architecture to architecture."

        script        common.cdl
    }

    cdl_component CYGPKG_HAL_COMMON_INTERRUPTS {
        display       "HAL interrupt handling"
        flavor        none
        description   "
            A number of configuration options related to interrupt
            handling are common to most or all HAL packages, even though
            the implementations will vary from architecture to
            architecture."

        script        interrupts.cdl
    }

    cdl_component CYGPKG_HAL_COMMON_CONTEXT {
        display       "HAL context switch support"
        flavor        none
        description   "
            A number of configuration options related to thread contexts
            are common to most or all HAL packages, even though the
            implementations will vary from architecture to architecture."

        cdl_option CYGDBG_HAL_COMMON_CONTEXT_SAVE_MINIMUM {
            display       "Use minimum thread context"
            parent        CYGPKG_HAL_COMMON_CONTEXT
            default_value 1
            description   "
                The thread context switch code can exploit the calling
                conventions defined for a given architecture to reduce the
                amount of state that has to be saved during a context
                switch. Generally this improves performance and reduces
                code size. However it can make source-level debugging more
                difficult."
        }
    }

    cdl_component CYGPKG_HAL_CACHE_CONTROL {
        display       "Explicit control over cache behaviour"
        flavor        none
        no_define
        description   "
            These options let the default behaviour of the caches 
            be easily configurable."

        cdl_component CYGSEM_HAL_ENABLE_DCACHE_ON_STARTUP {
            display       "Enable DATA cache on startup"
            default_value 1
            description   "
                Enabling this option will cause the data cache to be enabled
                as soon as practicable when eCos starts up.  One would choose
                to disable this if the data cache cannot safely be turned on,
                such as a case where the cache(s) require additional platform
                specific setup."
            cdl_option CYGSEM_HAL_DCACHE_STARTUP_MODE {
                display       "DATA cache mode on startup"
                flavor        data
                legal_values  { "COPYBACK" "WRITETHRU" }
                default_value { "COPYBACK" }
                description   "
                    This option controls the mode the cache will be set to
                when enabled on startup."
            }
        }

        cdl_option CYGSEM_HAL_ENABLE_ICACHE_ON_STARTUP {
            display       "Enable INSTRUCTION cache on startup"
            default_value 1
            description   "
                Enabling this option will cause the instruction cache to be enabled
                as soon as practicable when eCos starts up.  One would choose
                to disable this if the instruction cache cannot safely be turned on,
                such as a case where the cache(s) require additional platform
                specific setup."
        }
    }

    cdl_component CYGPKG_HAL_DEBUG {
        display       "Source-level debugging support"
        flavor        none
        description   "
            If the source level debugger gdb is to be used for debugging
            application code then it may be necessary to configure in support
            for this in the HAL."

        script        debugging.cdl
    }

    cdl_component CYGPKG_HAL_ROM_MONITOR {
        display       "ROM monitor support"
        flavor        none
        no_define
        description   "
            Support for ROM monitors can be built in to your application. 
            It may also be relevant to build your application as a ROM monitor
            itself. Such options are contained here if relevant for your chosen
            platform. The options and ROM monitors available to choose are
            platform-dependent."



        cdl_interface CYGINT_HAL_VIRTUAL_VECTOR_SUPPORT {
            display "Target has virtual vector support"
            no_define
        }


        cdl_interface CYGINT_HAL_VIRTUAL_VECTOR_COMM_BAUD_SUPPORT {
            display     "Target supports baud rate control via vectors"
            no_define
            description "
                Whether this target supports the __COMMCTL_GETBAUD
                and __COMMCTL_SETBAUD virtual vector comm control operations."
        }

        cdl_component CYGSEM_HAL_VIRTUAL_VECTOR_SUPPORT {
            display     "Enable use of virtual vector calling interface"
            active_if   CYGINT_HAL_VIRTUAL_VECTOR_SUPPORT
            calculated  1
            description "
                Virtual vector support allows the HAL to let the ROM
                monitor handle certain operations. The virtual vector table
                defines a calling interface between applications running in
                RAM and the ROM monitor."
            compile     hal_if.c hal_misc.c


            cdl_option CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE {
                display       "Inherit console settings from ROM monitor"
	        active_if     CYGSEM_HAL_USE_ROM_MONITOR
                default_value { !CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS }
                description   "
                    When this option is set, the application will inherit
	            the console as set up by the ROM monitor. This means
                    that the application will use whatever channel and
                    mangling style was used by the ROM monitor when
                    the application was launched."
            }

            cdl_option CYGPRI_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL_CONFIGURABLE {
                display       "Debug channel is configurable"
                calculated    { CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS }
                description   "
                    This option is a configuration hint - it is enabled
                    when the HAL initialization code will make use
                    of the debug channel configuration option."
            }

            cdl_option CYGPRI_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_CONFIGURABLE {
                display       "Console channel is configurable"
                calculated    { !CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE \