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# ====================================================================
#
#      hal_i386.cdl
#
#      i386 architectural HAL package configuration data
#
# ====================================================================
## ####ECOSGPLCOPYRIGHTBEGIN####                                            
## -------------------------------------------                              
## This file is part of eCos, the Embedded Configurable Operating System.   
## Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
##
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## the terms of the GNU General Public License as published by the Free     
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## version.                                                                 
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## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
## for more details.                                                        
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##
## As a special exception, if other files instantiate templates or use      
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## ####ECOSGPLCOPYRIGHTEND####                                              
# ====================================================================
######DESCRIPTIONBEGIN####
#
# Author(s):      jskov
# Original data:  jskov
# Contributors:
# Date:           1999-11-01
#
#####DESCRIPTIONEND####
#
# ====================================================================

cdl_package CYGPKG_HAL_I386 {
    display       "i386 architecture"
    parent        CYGPKG_HAL
    hardware
    include_dir   cyg/hal
    define_header hal_i386.h
    description   "
        The i386 architecture HAL package provides generic
        support for this processor architecture. It is also
        necessary to select a specific target platform HAL
        package."

    implements    CYGINT_PROFILE_HAL_MCOUNT
    
    compile       hal_misc.c context.S i386_stub.c hal_syscall.c

    make {
        <PREFIX>/lib/vectors.o : <PACKAGE>/src/vectors.S
        $(CC) -Wp,-MD,vectors.tmp $(INCLUDE_PATH) $(CFLAGS) -c -o $@ $<
        @echo $@ ": \\" > $(notdir $@).deps
        @tail -n +2 vectors.tmp >> $(notdir $@).deps
        @echo >> $(notdir $@).deps
        @rm vectors.tmp
    }

    make {
        <PREFIX>/lib/target.ld: <PACKAGE>/src/i386.ld
        $(CC) -E -P -Wp,-MD,target.tmp -DEXTRAS=1 -xc $(INCLUDE_PATH) $(ACTUAL_CFLAGS) -o $@ $<
        @echo $@ ": \\" > $(notdir $@).deps
        @tail -n +2 target.tmp >> $(notdir $@).deps
        @echo >> $(notdir $@).deps
        @rm target.tmp
    }

    cdl_component CYGPKG_HAL_SMP_SUPPORT {
        display       "SMP support"
        default_value 0
        requires { CYGHWR_HAL_I386_FPU_SWITCH_LAZY == 0 }
        
        cdl_option CYGPKG_HAL_SMP_CPU_MAX {
            display       "Max number of CPUs supported"
            flavor        data
            default_value 2
        }
    }
        
    cdl_component CYGHWR_HAL_I386_FPU {
        display       "Enable I386 FPU support"
        default_value 1
        description   "This component enables support for the
                      I386 floating point unit."

        cdl_option CYGHWR_HAL_I386_FPU_SWITCH_LAZY {
            display       "Use lazy FPU state switching"
            flavor        bool
            default_value 1

            description "
                        This option enables lazy FPU state switching.
                        The default behaviour for eCos is to save and
                        restore FPU state on every thread switch, interrupt
                        and exception. While simple and deterministic, this
                        approach can be expensive if the FPU is not used by
                        all threads. The alternative, enabled by this option,
                        is to use hardware features that allow the FPU state
                        of a thread to be left in the FPU after it has been
                        descheduled, and to allow the state to be switched to
                        a new thread only if it actually uses the FPU. Where
                        only one or two threads use the FPU this can avoid a
                        lot of unnecessary state switching."
        }
    }
    
    cdl_component CYGHWR_HAL_I386_PENTIUM {
        display       "Enable Pentium class CPU features"
        default_value 0
        description   "This component enables support for various
                      features of Pentium class CPUs."

        cdl_option CYGHWR_HAL_I386_PENTIUM_SSE {
            display       "Save/Restore SSE registers on context switch"
            flavor        bool
            default_value 0

            description "
                        This option enables SSE state switching. The default
                        behaviour for eCos is to ignore the SSE registers.
                        Enabling this option adds SSE state information to
                        every thread context."
        }

        cdl_option CYGHWR_HAL_I386_PENTIUM_GDB_REGS {
            display       "Support extra Pentium registers in GDB stub"
            flavor        bool
            default_value 0

            description "
                        This option enables support for extra Pentium registers
                        in the GDB stub. These are registers such as CR0-CR4, and
                        all MSRs. Not all GDBs support these registers, so the
                        default behaviour for eCos is to not include them in the
                        GDB stub support code."
        }
    }
    
    cdl_option CYGBLD_LINKER_SCRIPT {
        display "Linker script"
        flavor data
        no_define
        calculated  { "src/i386.ld" }
    }

    cdl_interface CYGINT_HAL_I386_MEM_REAL_REGION_TOP {
        display  "Implementations of hal_i386_mem_real_region_top()"
    }

    cdl_component CYGPKG_REDBOOT_I386_LINUX_EXEC {
        display        "Provide the exec command in RedBoot"
        flavor         none
        active_if      CYGBLD_BUILD_REDBOOT_WITH_EXEC
        description    "
            This option contains requirements for booting linux
            from RedBoot. The component is enabled/disabled from
            RedBoots CDL."
        compile -library=libextras.a redboot_linux_exec.c 

        cdl_option CYGHWR_REDBOOT_I386_TRAMPOLINE_ADDRESS {
            display       "Address for the trampoline code"
            flavor        data
            default_value 0x7C000
            description   "This is the address to where the trampoline code is
                           copied.  The trampoline copies the image to its
                           final location and jumps to its entry point."
        }
    }
}