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##=============================================================================
##
##      arch.inc
##
##      OpenRISC 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):   sfurman
## Contributors:
## Date:        2003-01-15
## Purpose:     Architecture definitions.
## Description: This file contains various definitions and macros that are
##              useful for writing assembly code for the OpenRISC CPU family.
## Usage:
##              #include <cyg/hal/arch.inc>
##              ...
##              
##
######DESCRIPTIONEND####
##
##=============================================================================

#ifndef CYGONCE_HAL_ARCH_INC
#define CYGONCE_HAL_ARCH_INC

# Declare given label name as the start of a function accessible from C code
#define FUNC_START(name)        \
        .type name,@function;   \
        .globl name;            \
name:   

#define FUNC_END(name)

# Make aliases for ABI distinguished registers
#define sp r1
#define fp r2
#define lr r9
#define rv r11

# Size of GPR regs - 4 bytes for or32
#define OR1K_GPRSIZE    4

# Size of all other registers
#define OR1K_REGSIZE    4

# Utility macro: Load a 32-bit constant into a register
        .macro  load32i reg const
        l.movhi \reg,hi(\const)
        l.ori   \reg,\reg,lo(\const)
        .endm

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

## OpenRISC thread and interrupt saved state structure. These offsets
## must match the layout of the HAL_SavedRegisters struct in
## hal_arch.h. Do not change this without changing the layout there,
## or viceversa.

#define OR1KREGS_GPRS   0
#define OR1KREG_MACHI   (OR1KREGS_GPRS + OR1K_GPRSIZE * 32)
#define OR1KREG_MACLO   (OR1KREG_MACHI + OR1K_REGSIZE)
#define OR1KREG_VECTOR  (OR1KREG_MACLO + OR1K_REGSIZE)
#define OR1KREG_SR      (OR1KREG_VECTOR+ OR1K_REGSIZE)
#define OR1KREG_PC      (OR1KREG_SR    + OR1K_REGSIZE)
#define OR1KREG_EEAR    (OR1KREG_PC    + OR1K_REGSIZE)

#define SIZEOF_OR1KREGS (OR1KREG_EEAR  + OR1K_REGSIZE)

#include <cyg/hal/openrisc.inc>

#endif // #ifndef CYGONCE_HAL_ARCH_INC

// EOF arch.inc

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