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#ifndef CYGONCE_HAL_VARIANT_INC

#define CYGONCE_HAL_VARIANT_INC

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

##

##      variant.inc

##

##      PPC60x family 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.

## 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):   jskov

## Contributors:jskov, gthomas

## Date:        2000-02-04

## Purpose:     PPC60x family definitions.

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

##              useful for writing assembly code for the PPC60x CPU family.

## Usage:

##              #include 

##              ...

##

##

######DESCRIPTIONEND####

##

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

#include 

#include 

#include 

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

## PPC60x defined vectors

        .macro hal_extra_vectors

        exception_vector        instruction_TLB

        exception_vector        data_load_TLB

        exception_vector        data_store_TLB

        exception_vector        instruction_address_breakpoint

        exception_vector        system_management_interrupt

        .endm

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

## PPC60x CPU initialization

##

## Initialize CPU to a post-reset state, ensuring the ground doesn''t

## shift under us while we try to set things up.

        .macro hal_cpu_init

        # Set up MSR (disable MMU for now)

        lwi     r3,(CYG_MSR & ~(MSR_IR | MSR_DR))

        sync

        mtmsr   r3

        sync

        .endm

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

## PPC60x monitor initialization

#ifndef CYGPKG_HAL_PPC_MON_DEFINED

#if     defined(CYG_HAL_STARTUP_ROM) ||                 \

        (       defined(CYG_HAL_STARTUP_RAM) &&         \

                !defined(CYGSEM_HAL_USE_ROM_MONITOR))

        .macro  hal_mon_init

#ifdef CYGSEM_HAL_POWERPC_COPY_VECTORS

        # If we are starting up from ROM and want vectors in RAM

        # or we are starting in RAM and NOT using a ROM monitor,

        # copy exception handler code to 0.

        lwi     r3,rom_vectors          # r3 = rom start

        lwi     r4,0                    # r4 = ram start

        lwi     r5,rom_vectors_end      # r5 = rom end

        cmplw   r3,r5                   # skip if no vectors

        beq     2f

        subi    r3,r3,4

        subi    r4,r4,4

        subi    r5,r5,4

1:

        lwzu    r0,4(r3)                # get word from ROM

        stwu    r0,4(r4)                # store in RAM

        cmplw   r3,r5                   # compare

        blt     1b                      # loop if not yet done

2:

#endif

        # Next initialize the VSR table. This happens whether the

        # vectors were copied to RAM or not.

        # First fill with exception handlers

        lwi     r3,cyg_hal_default_exception_vsr

        lwi     r4,hal_vsr_table

        subi    r4,r4,4

        li      r5,CYGNUM_HAL_VSR_COUNT

1:      stwu    r3,4(r4)

        subi    r5,r5,1

        cmpwi   r5,0

        bne     1b

        # Then fill in the special vectors

        lwi     r3,cyg_hal_default_interrupt_vsr

        lwi     r4,hal_vsr_table

        stw     r3,CYGNUM_HAL_VECTOR_INTERRUPT*4(r4)

        stw     r3,CYGNUM_HAL_VECTOR_DECREMENTER*4(r4)

        .endm

#elif defined(CYG_HAL_STARTUP_RAM) && defined(CYGSEM_HAL_USE_ROM_MONITOR)

        # Initialize the VSR table entries

        # We only take control of the interrupt vectors,

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

        .macro  hal_mon_init

        lwi     r3,cyg_hal_default_interrupt_vsr

        lwi     r4,hal_vsr_table

        stw     r3,CYGNUM_HAL_VECTOR_INTERRUPT*4(r4)

        stw     r3,CYGNUM_HAL_VECTOR_DECREMENTER*4(r4)

        .endm

#else

        .macro  hal_mon_init

        .endm

#endif

#define CYGPKG_HAL_PPC_MON_DEFINED

#endif // CYGPKG_HAL_PPC_MON_DEFINED

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

## PPC60x exception state handling

        .macro  hal_variant_save regs

        .endm

        .macro  hal_variant_load regs

        .endm

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

## Indicate that the ISR tables are defined in variant.S

#define CYG_HAL_PPC_ISR_TABLES_DEFINED

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

#endif // ifndef CYGONCE_HAL_VARIANT_INC

# end of variant.inc