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#ifndef CYGONCE_HAL_PLATFORM_INC

#define CYGONCE_HAL_PLATFORM_INC

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

##

##      platform.inc

##

##      SH/CQ7750 board assembler header file

##

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

## ####ECOSGPLCOPYRIGHTBEGIN####

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

## This file is part of eCos, the Embedded Configurable Operating System.

## Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

##

## 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.,

## 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 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 v2.

##

## This exception does not invalidate any other reasons why a work based

## on this file might be covered by the GNU General Public License.

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

## ####ECOSGPLCOPYRIGHTEND####

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

#######DESCRIPTIONBEGIN####

##

## Author(s):   jskov

## Contributors:jskov, t@keshi.org

## Date:        2000-04-18

## Purpose:     SH/Dreamcast platform initialization macros.

## Description: This file contains various definitions and macros that are

##              useful for writing assembly code for the SH/Dreamcast.

## Usage:

##              #include 

##              ...

##

##

######DESCRIPTIONEND####

##

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

#include 

#include 

#include 

#define CYG_SR (CYGARC_REG_SR_MD|CYGARC_REG_SR_IMASK)

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

# Hardware initialization.

        .macro  hal_hardware_init

        .endm

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

# Post reset initialization

#ifndef CYGPKG_HAL_SH_POST_RESET_INIT

        .macro  hal_post_reset_init

        # Initialize CPU

        mov.l   $nCYG_SR,r1             ! Put CPU in a well-known state

        ldc     r1,sr

        mov     #0,r0

#if     !defined(CYG_HAL_STARTUP_RAM)

        mov.l   $nCYGARC_REG_CCR,r1     ! Disable cache

        mov.l   r0,@r1

#endif

        mov.l   $nCYGARC_REG_MMUCR,r1   ! Disable MMU

        mov.l   r0,@r1

        mov.l   $nCYGARC_REG_BBRA,r1    ! Disable UBC Channel A

        mov.w   r0,@r1

        mov.l   $nCYGARC_REG_BBRB,r1    ! Disable UBC Channel B

        mov.w   r0,@r1

        mov.l   $nCYGARC_REG_BRCR,r1    ! Reset UBC common register

        mov.w   r0,@r1

        mov.l   $CYGARC_REG_TSTR,r1     ! Disable timers

        mov.b   r0,@r1

        mov.l   $CYGARC_REG_IPRA,r1     ! Disable interrupt request sources

        mov.w   r0,@r1

        mov.l   $CYGARC_REG_IPRB,r1

        mov.w   r0,@r1

        mov.l   $CYGARC_REG_IPRC,r1

        mov.w   r0,@r1

        mov.w   $nCYG_WTCSR,r0          ! Clear watchdog

        mov.l   $nCYGARC_REG_WTCSR,r1

        mov.w   r0,@r1

        # Initialize VBR if necessary

#if     !defined(CYG_HAL_STARTUP_RAM) ||                \

        (       defined(CYG_HAL_STARTUP_RAM) &&         \

                !defined(CYGSEM_HAL_USE_ROM_MONITOR))

        mov.l   $_reset,r1             ! Set VBR

        ldc     r1,vbr

#endif

        bra     1f

         nop

$nCYG_WTCSR:

        .word   0xa500          ! clear all CSR bits

        .align  2

$nCYG_SR:

        .long   CYG_SR

$nCYGARC_REG_CCR:

        .long   CYGARC_REG_CCR

$nCYGARC_REG_MMUCR:

        .long   CYGARC_REG_MMUCR

$nCYGARC_REG_BBRA:

        .long   CYGARC_REG_BBRA

$nCYGARC_REG_BBRB:

        .long   CYGARC_REG_BBRB

$nCYGARC_REG_BRCR:

        .long   CYGARC_REG_BRCR

$CYGARC_REG_TSTR:

        .long   CYGARC_REG_TSTR

$CYGARC_REG_IPRA:

        .long   CYGARC_REG_IPRA

$CYGARC_REG_IPRB:

        .long   CYGARC_REG_IPRB

$CYGARC_REG_IPRC:

        .long   CYGARC_REG_IPRC

$nCYGARC_REG_WTCSR:

        .long   CYGARC_REG_WTCSR

        SYM_PTR_REF(_reset)

1:

        .endm

#define CYGPKG_HAL_SH_POST_RESET_INIT

#endif

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

# Monitor initialization.

#ifndef CYGPKG_HAL_SH_MON_DEFINED

#if !defined(CYGSEM_HAL_USE_ROM_MONITOR)

        # If we are starting up from ROM, or we are starting in

        # RAM and NOT using a ROM monitor, initialize the VSR table.

        .macro  hal_mon_init

        mov.l   $hal_vsr_table,r3

        # Write exception vectors

        mov.l   $cyg_hal_default_exception_vsr,r4

        mov     #CYGNUM_HAL_VSR_EXCEPTION_COUNT,r5

1:      mov.l   r4,@r3

        add     #4,r3

        dt      r5

        bf      1b

        # Write interrupt vector

        mov.l   $cyg_hal_default_interrupt_vsr,r4

        mov.l   $hal_vsr_table,r3

        add     #CYGNUM_HAL_VECTOR_INTERRUPT*4,r3

        mov.l   r4,@r3

        bra     2f

         nop

        .align  2

        SYM_PTR_REF(cyg_hal_default_exception_vsr)

        SYM_PTR_REF(cyg_hal_default_interrupt_vsr)

        SYM_PTR_REF(hal_vsr_table)

2:

        .endm

#elif defined(CYGSEM_HAL_USE_ROM_MONITOR)

        # Initialize the VSR table entries

        # We only take control of the interrupt vector,

        # the rest are left to the ROM for now...

        .macro  hal_mon_init

        # Write interrupt vector

        mov.l   $hal_vsr_table,r3

        mov.l   $cyg_hal_default_interrupt_vsr,r4

        add     #CYGNUM_HAL_VECTOR_INTERRUPT*4,r3

        mov.l   r4,@r3

        bra     2f

         nop

        .align  2

        SYM_PTR_REF(cyg_hal_default_interrupt_vsr)

        SYM_PTR_REF(hal_vsr_table)

2:

        .endm

#else

        .macro  hal_mon_init

        .endm

#endif

#define CYGPKG_HAL_SH_MON_DEFINED

#endif // CYGPKG_HAL_SH_MON_DEFINED

#endif // CYGONCE_HAL_PLATFORM_INC