Subversion Repositories or1k

#ifndef CYGONCE_HAL_VARIANT_INC

#define CYGONCE_HAL_VARIANT_INC

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

##

##      variant.inc

##

##      IDT32334 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.

##

## 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):    tmichals

## Contributors: nickg

## Date:         2003-02-13

## Purpose:      MIPS IDT32334 family definitions.

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

##               useful for writing assembly code for the MIPS IDT32334 CPU family.

## Usage:

##               #include 

##               ...

##

##

######DESCRIPTIONEND####

##

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

#include 

#include 

#include 

#define CYGARC_HAL_COMMON_EXPORT_CPU_MACROS

#ifndef __ASSEMBLER__

#define __ASSEMBLER__

#endif

//#include 

#define CYGARC_ADDRESS_REG_UNCACHED(reg)               \

        and     reg, reg, ~CYGARC_KSEG_MASK;           \

        or      reg, reg, CYGARC_KSEG_UNCACHED

#define CYGARC_KSEG_MASK                               (0xE0000000)

#define CYGARC_KSEG_CACHED                             (0x80000000)

#define CYGARC_KSEG_UNCACHED                           (0xA0000000)

#define CYGARC_KSEG_CACHED_BASE                        (0x80000000)

#define CYGARC_KSEG_UNCACHED_BASE                      (0xA0000000)

//-----------------------------------------------------------------------------

// Load Address and Relocate. This macro is used in code that may be

// linked to execute out of RAM but is actually executed from ROM. The

// code that initializes the memory controller and copies the ROM

// contents to RAM must work in this way, for example. This macro is used

// in place of an "la" macro instruction when loading code and data

// addresses.  There are two versions of the macro here. The first

// assumes that we are executing in the ROM space at 0xbfc00000 and are

// linked to run in the RAM space at 0x80000000.  It simply adds the

// difference between the two to the loaded address.  The second is more

// code, but will execute correctly at either location since it

// calculates the difference at runtime.  The second variant is enabled

// by default.

#ifdef CYG_HAL_STARTUP_ROMRAM

        .macro  lar     reg,addr

.set    noat

        move    $at,ra                  # save ra

        la      \reg,\addr              # get address into register

        la      ra,x\@                  # get linked address of label

        sub     \reg,\reg,ra            # subtract it from value

        bal     x\@                     # branch and link to label

        nop                             #  to get current actual address

x\@:

        add     \reg,\reg,ra            # add actual address

        move    ra,$at                  # restore ra

.set    at

        .endm

#define CYGPKG_HAL_MIPS_LAR_DEFINED

#endif

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

# Cache macros.

#ifndef CYGPKG_HAL_MIPS_CACHE_DEFINED

        .macro  hal_cache_init

        # Setup a temporary stack pointer for running C code.

        la      a0,__interrupt_stack

        move    sp,a0

        CYGARC_ADDRESS_REG_UNCACHED(sp)

        # Read the CONFIG1 register into a0

#       mfc0    a0, C0_CONFIG

        nop

        nop

        nop

        # Jump to C-code to initialize caches (uncached)

        lar     k0, hal_c_cache_init

        CYGARC_ADDRESS_REG_UNCACHED(k0)

        jalr    k0

        nop

        .endm

#define CYGPKG_HAL_MIPS_CACHE_DEFINED

#endif

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

## Define CPU variant for architecture HAL.

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

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

#define CYG_HAL_MIPS_ISR_TABLES_DEFINED

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

##

#ifndef CYGPKG_HAL_MIPS_MEMC_DEFINED

## ROM timing characteristics are dependent on the clock speed.

        .macro  hal_memc_init

        .endm

#define CYGPKG_HAL_MIPS_MEMC_DEFINED

#endif

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

## IDT32334 interrupt handling.

#ifndef CYGPKG_HAL_MIPS_INTC_DEFINED

        # Set all ILRX registers to 0, masking all external interrupts.

        .macro  hal_intc_init

        .endm

        .macro  hal_intc_decode vnum

        mfc0    v1,cause

        nop

        mfc0    v0,status

        nop

        and     v1,v0,v1

        srl     v1,v1,11                        # shift IP bits to ls bits

        andi    v1,v1,0x7F                      # isolate IP bits

        la      v0,hal_intc_translation_table   # address of translation table

        add     v0,v0,v1                        # offset of index byte

        lb      \vnum,0(v0)                     # load it

        .endm

#ifndef CYGPKG_HAL_MIPS_INTC_TRANSLATE_DEFINED

#ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN

        .macro  hal_intc_translate inum,vnum

        move    \vnum,zero                      # Just vector zero is supported

        .endm

#else

        .macro  hal_intc_translate inum,vnum

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

        .endm

#endif

#endif

# This table translates from the 6 bit value supplied in the IP bits

# of the cause register into a 0..16 offset into the ISR tables.

        .macro  hal_intc_decode_data

hal_intc_translation_table:

        .byte   0,1,0,0,3,3,0,0

        .byte   0,0,0,0,0,0,0,0

        .byte   5,5,0,0,0,5,0,0

        .byte   0,0,0,0,0,0,0,0

        .byte   0,0,0,0,0,0,0,0

        .byte   0,0,0,0,0,0,0,0

        .byte   0,0,0,0,0,0,0,0

        .byte   0,0,0,0,0,0,0,0

        .endm

#define CYGPKG_HAL_MIPS_INTC_DEFINED

#endif

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

# Diagnostics macros.

#if 0

#ifndef CYGPKG_HAL_MIPS_DIAG_DEFINED

        # Set up PIO0 for debugging output

        .macro  hal_diag_init

        .endm

#define CYGPKG_HAL_MIPS_DIAG_DEFINED

#endif

#endif

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

#endif // ifndef CYGONCE_HAL_VARIANT_INC

# end of variant.inc