Subversion Repositories openrisc

#ifndef CYGONCE_HAL_PLATFORM_INC

#define CYGONCE_HAL_PLATFORM_INC

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

##

##      platform.inc

##

##      Malta board 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

## 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):   dmoseley

## Contributors:dmoseley, jskov

## Date:        2001-03-20

## Purpose:     Malta board definitions.

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

##              useful for writing assembly code for the Malta board.

## Usage:

##              #include 

##              ...

##

##

######DESCRIPTIONEND####

##

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

#include 

#include 

#include 

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

# Additional bits for status register.

# We set the IM[0] bit to accept all interrupts.

#define INITIAL_SR_PLF 0x00000400

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

#define CYGPKG_HAL_RESET_VECTOR_FIRST_CODE

        .macro hal_reset_vector_first_code

        # Branch forward past the board ID register.

        b 1f

        nop

        nop

        nop

        nop

        nop

1:

        .endm

#define CYGPKG_HAL_EARLY_INIT

        .macro  hal_early_init

        # Do these initializations early (rather than in hal_memc_init) so

        # we have access to the LEDs on the board for debugging purposes.

        #

        # WARNING: THESE WRITES NEED TO HANDLE BYTE-SWAPPING PROPERLY WHEN DOING BIG-ENDIAN

        #

        #

        # Setup Galileo CPU Interface Register

        #

        # Set the WriteRate bit - ie Accept 'DDD' back-to-back transfers (see CoreLV "Users Manual")

        # All other bits stay the same

        #

        li      k0, CYGARC_UNCACHED_ADDRESS(HAL_GALILEO_REGISTER_BASE)

        lw      k1, HAL_GALILEO_CPU_INTERFACE_CONFIG_OFFSET(k0)

        li      k0, HAL_GALILEO_CPU_WRITERATE_MASK

        or      k1, k1, k0

        li      k0, CYGARC_UNCACHED_ADDRESS(HAL_GALILEO_REGISTER_BASE)

        sw      k1, HAL_GALILEO_CPU_INTERFACE_CONFIG_OFFSET(k0)

        #

        # Use BootCS chip-select for the entire device bus region

        #

        li      k1, 0

        sw      k1, HAL_GALILEO_CS3_HIGH_DECODE_OFFSET(k0)

        li      k1, 0xf0

        sw      k1, HAL_GALILEO_CSBOOT_LOW_DECODE_OFFSET(k0)

        li      k1, 0xff

        sw      k1, HAL_GALILEO_CSBOOT_HIGH_DECODE_OFFSET(k0)

        .endm

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

# Interrupt decode macros

# Only INTN[0] is connected on the Malta board. We need to access the

# interrupt controller to get the actual vector number.

#ifndef CYGPKG_HAL_MIPS_INTC_INIT_DEFINED

        .macro  hal_intc_init

        mfc0    v0,status

        nop

        lui     v1,0xFFFF

        ori     v1,v1,0x04FF

        and     v0,v0,v1        # Clear the IntMask bits except IM[0]

        mtc0    v0,status

        nop

        nop

        nop

        .endm

#define CYGPKG_HAL_MIPS_INTC_INIT_DEFINED

#endif

#ifndef CYGPKG_HAL_MIPS_INTC_TRANSLATE_DEFINED

#ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN

        # When chaining, go through trampoline for external

        # interrupts (we need to query the intc for the source)

        # but let other internal vectors go directly to the

        # chaining ISR.

        .macro  hal_intc_translate inum,vnum

        beqz    \inum,1f

         move    \vnum,\inum

        ori     \vnum,zero,CYGNUM_HAL_INTERRUPT_CHAINING

1:

        .endm

#else

        .macro  hal_intc_translate inum,vnum

        move    \vnum,\inum                     # Vector == interrupt number

        .endm

#endif

#define CYGPKG_HAL_MIPS_INTC_TRANSLATE_DEFINED

#endif

// We also define our own interrupt tables in platform.S...

#define CYG_HAL_MIPS_ISR_TABLES_DEFINED

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

# Diagnostic macros

#ifndef CYGPKG_HAL_MIPS_DIAG_DEFINED

        .macro  hal_diag_init

        .endm

        .macro  hal_diag_excpt_start

        .endm

        .macro  hal_diag_intr_start

        .endm

        .macro  hal_diag_restore

        .endm

#define CYGPKG_HAL_MIPS_DIAG_DEFINED

#endif // ifndef CYGPKG_HAL_MIPS_DIAG_DEFINED

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

# MEMC macros.

#

#if defined(CYG_HAL_STARTUP_ROM)

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

# Make sure the jump to _start in vectors.S is done uncached

#

#define CYGARC_START_FUNC_UNCACHED

        .macro  hal_memc_init

        .extern hal_malta_init_sdram

        lar     k0,hal_malta_init_sdram

        CYGARC_ADDRESS_REG_UNCACHED(k0)

        jalr    k0

        nop

        beqz    v0, 2f

        nop

        # Error in sizing memory

        DEBUG_ASCII_DISPLAY(HAL_DISPLAY_ASCIIPOS0, 'M')

        DEBUG_ASCII_DISPLAY(HAL_DISPLAY_ASCIIPOS1, 'E')

        DEBUG_ASCII_DISPLAY(HAL_DISPLAY_ASCIIPOS2, 'M')

        DEBUG_ASCII_DISPLAY(HAL_DISPLAY_ASCIIPOS3, 'E')

        DEBUG_ASCII_DISPLAY(HAL_DISPLAY_ASCIIPOS4, 'R')

        DEBUG_ASCII_DISPLAY(HAL_DISPLAY_ASCIIPOS5, 'R')

        DEBUG_ASCII_DISPLAY(HAL_DISPLAY_ASCIIPOS6, 'O')

        DEBUG_ASCII_DISPLAY(HAL_DISPLAY_ASCIIPOS7, 'R')

1:      b       1b

        nop

2:      # No error in sizing memory

        # Store the memory size at the base of RAM for later

        la      k0, 0x80000000

        move    k1, k0

        CYGARC_ADDRESS_REG_UNCACHED(k1)

        sw      v1, 0(k1)

        nop

        nop

        nop

        .endm

#define CYGPKG_HAL_MIPS_MEMC_DEFINED

#endif

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

#endif // ifndef CYGONCE_HAL_PLATFORM_INC

# end of platform.inc