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#ifndef CYGONCE_HAL_VARIANT_INC

#define CYGONCE_HAL_VARIANT_INC

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

##

##      variant.inc

##

##      SH4 variant assembler header file

##

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

#####ECOSGPLCOPYRIGHTBEGIN####

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

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

## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, 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

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##

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## 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

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## 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

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##

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

##

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

#####ECOSGPLCOPYRIGHTEND####

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

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

##

## Author(s):   jskov

## Contributors:jskov

## Date:        2000-10-30

## Purpose:     SH4 variant definitions and init code

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

##              useful for writing assembly code for the SH3 CPU family.

## Usage:

##              #include 

##              ...

##

##

######DESCRIPTIONEND####

##

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

#include 

#include 

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

## SR initialization value

## zero all bits except:

## MD = Processor operation mode field (privileged mode)

## I0-3 = Mask out all interrupts but NMI.

##

## When saving or restoring the state of an exception or interrupt, the bit

## CYGARC_REG_SR_RB is also set, switching the register bank. When this bit

## is set, interrupts must be disabled.

##

## Note: We could also use the BL bit to prevent interrupts, but that would

##       also prevent the use of breakpoints.

#define CYG_SR (CYGARC_REG_SR_MD|CYGARC_REG_SR_IMASK)

#define CYG_SR_BANK1 (CYGARC_REG_SR_MD|CYGARC_REG_SR_IMASK|CYGARC_REG_SR_RB)

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

## Hardware init macros

#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

        mov.l   $nCYGARC_REG_CCR,r1     ! Disable cache

        mov.l   r0,@r1

        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

#if (CYGARC_SH_MOD_INTC == 2)

        mov.l   $CYGARC_REG_IPRD,r1

        mov.w   r0,@r1

#endif

        mov.w   $nCYG_WTCSR,r0          ! Clear watchdog

        mov.l   $nCYGARC_REG_WTCSR,r1

        mov.w   r0,@r1

        mov.w   $nCYG_ICR_INIT,r0

        mov.l   $CYGARC_REG_ICR,r1      ! Set interrupt controller to IRQ mode

        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

#if (CYGARC_SH_MOD_INTC == 2)

$CYGARC_REG_IPRD:

        .long   CYGARC_REG_IPRD

#endif

$nCYGARC_REG_WTCSR:

        .long   CYGARC_REG_WTCSR

$CYGARC_REG_ICR:

        .long   CYGARC_REG_ICR

        SYM_PTR_REF(_reset)

        # Data below only need word alignment

$nCYG_ICR_INIT:

        .word   CYGARC_REG_ICR_INIT

1:

        .endm

#define CYGPKG_HAL_SH_POST_RESET_INIT

#endif

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

## Interrupt decode macros

        .macro  hal_intc_decode tmp,inum

        mov.l   1f,\tmp

        mov.l   @\tmp,\inum

        mov     #-5,\tmp                ! divide cause by 0x20

        shld    \tmp,\inum

        bra     2f

         add     #-14,\inum             ! adjust so NMI becomes 0

        .align  2

1:      .long   CYGARC_REG_INTEVT

2:

        .endm

#ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN

        .macro  hal_intc_translate inum,vnum

        mov     #0,\vnum                ! Just vector zero is supported

        .endm

#else

        .macro  hal_intc_translate inum,vnum

        mov     \inum,\vnum             ! Vector == interrupt number

        shll2   \vnum                   ! get from vector number to ISR index

        .endm

#endif

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

#endif // CYGONCE_HAL_VARIANT_INC

# end of variant.inc