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#ifndef CYGONCE_HAL_VARIANT_INC
#define CYGONCE_HAL_VARIANT_INC
##=============================================================================
##
##      variant.inc
##
##      AM31 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      
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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 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):   nickg
## Contributors:        nickg
## Date:        1999-04-06
## Purpose:     AM31 definitions.
## Description: This file contains various definitions and macros that are
##              useful for writing assembly code for the AM31 CPU variant.
## Usage:
##              #include <cyg/hal/variant.inc>
##              ...
##              
##
######DESCRIPTIONEND####
##
##=============================================================================

#include <pkgconf/hal.h>

#include <cyg/hal/platform.inc>


#------------------------------------------------------------------------------
# Register definitions

#define NMICR   0x34000100      // NMI control register
#define DCR     0x20000030      // Debug control register
#define ISR     0x20000034      // Interrupt control register

#define DCR_DE  0x0010          // DE bit in DCR

#------------------------------------------------------------------------------
# CPU state save and restore macros

        .macro  hal_cpu_save_all
        movm    [d2,d3,a2,a3,other],(sp)                # push all registers
        .endm

        .macro  hal_cpu_load_all
        movm    (sp),[d2,d3,a2,a3,other]                # pop regs
        .endm

        .macro  hal_cpu_get_psw reg
        mov     psw,\reg
        .endm

        .macro  hal_cpu_set_psw reg
        mov     \reg,psw
        .endm

# Location of PC in saved register context (HAL_SavedRegisters)
#define SAVED_CONTEXT_PC_OFFSET          56

##-----------------------------------------------------------------------------
# It appears that there is an undocumented extra bit
# in the PSW that masks the delivery of NMIs. It is in
# the upper 16 bits of the register that we cannot access
# directly. So, to clear it, we must set up a fake interrupt
# state and do an RTI to load the PSW. We need to do this if
# we are going to be able to set breakpoints in NMI handlers.
# Note that the AM33 has a documented NMID at bit 17 of the
# extended PSW (along with instructions to access it).

        .macro  hal_cpu_clear_nmid
        mov     PSW,d3                          # D3 = PSW
        and     0xFFFF,d3
        mov     nmid\@,d2                       # D2 = Next PC
        movm    [d2,d3],(sp)                    # Push
        rti                                     # and load into CPU
nmid\@: 
        .endm


##-----------------------------------------------------------------------------
## Register addresses and initialization values
        
        .equ    IOBCTR  ,0x32000010
        .equ    MEMCTR0 ,0x32000020
        .equ    MEMCTR1 ,0x32000022
        .equ    MEMCTR2 ,0x32000024
        .equ    MEMCTR3 ,0x32000026
        .equ    MEMCTR4 ,0x32000028
        .equ    MEMCTR5 ,0x3200002a
        .equ    MEMCTR6 ,0x3200002c
        .equ    MEMCTR7 ,0x3200002e
        .equ    DRAMCTR ,0x32000040
        .equ    REFCNT  ,0x32000042

        .equ    INIT_MEMCTR0,0x1200     # 2wait
        .equ    INIT_MEMCTR1,0x0120     # 1wait-32bit-
        .equ    INIT_MEMCTR2,0x0065
        .equ    INIT_DRAMCTR,0x0287
        .equ    INIT_REFCNT,0x00eb      

        .equ    P2OUT   ,0x36008004
        .equ    P2MD    ,0x36008024
        .equ    P2SS    ,0x36008044
        .equ    P2DIR   ,0x36008064

        .equ    INIT_P2MD,0xf0
        .equ    INIT_P2DIR,0xff

#------------------------------------------------------------------------------
# MEMC macros.
        
#ifndef CYGPKG_HAL_MN10300_MEMC_DEFINED

        .macro  hal_memc_init
        mov     INIT_MEMCTR0,d2
        movhu   d2,(MEMCTR0)

        mov     INIT_MEMCTR1,d2
        movhu   d2,(MEMCTR1)

        mov     INIT_MEMCTR2,d2
        movhu   d2,(MEMCTR2)

        mov     INIT_REFCNT,d2
        movhu   d2,(REFCNT)

        mov     INIT_DRAMCTR,d2
        movhu   d2,(DRAMCTR)
        .endm

#define CYGPKG_HAL_MN10300_MEMC_DEFINED

#endif  

##-----------------------------------------------------------------------------
# Default interrupt decoding macros.

#ifndef CYGPKG_HAL_MN10300_INTC_DEFINED


        
        # initialize all interrupts to disabled
        .macro  hal_intc_init
        .endm

#ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN

#define CYG_ISR_TABLE_SIZE      10

        .macro  hal_intc_decode dreg,areg,dreg1
        mov     _mn10300_interrupt_control,\areg
        movhu   (0x100,\areg),\dreg1            # dreg1 = IAGR
        mov     (0,a2),\dreg                    # dreg = vector priority
        mov     \dreg1,(0,a2)                   # store real vector in saved state
        asl     2,\dreg                         # dreg = byte index of isr
        add     12,\dreg                        # skip NMI vectors
        .endm

#define CYGPKG_HAL_MN10300_INTC_DECODE_DEFINED

#else

#define CYG_ISR_TABLE_SIZE       34

        # decode the interrupt
        .macro  hal_intc_decode dreg,areg,dreg1
        mov     _mn10300_interrupt_control,\areg
        movhu   (0x100,\areg),\dreg             # dreg = IAGR
        mov     \dreg,(0,a2)                    # store real vector in saved state
        add     12,\dreg                        # skip NMI vectors
        .endm

#define CYGPKG_HAL_MN10300_INTC_DECODE_DEFINED

#endif

#define CYGPKG_HAL_MN10300_INTC_DEFINED

#endif


#------------------------------------------------------------------------------
# Diagnostics macros.
        
#ifndef CYGPKG_HAL_MN10300_DIAG_DEFINED

        .macro  hal_diag_init
        # Set up LED
        mov     INIT_P2MD,d2
        movbu   d2,(P2MD)
        mov     INIT_P2DIR,d2
        movbu   d2,(P2DIR)
        .endm

        .macro  hal_diag_excpt_start
        .endm

        .macro  hal_diag_intr_start
        .endm

        .macro  hal_diag_restore
        .endm

        .macro  hal_diag_led val
        movm    [d2],(sp)
        mov     \val,d2
        asl     4,d2
        movbu   d2,(P2OUT)
        movm    (sp),[d2]
        .endm


        .macro  hal_diag_data
led_count:      .long 0
led_value:      .byte 0x40
led_foo1:       .byte 0x00 # Keep alignment to work around compiler/linker bug
led_foo2:       .byte 0x00
led_foo3:       .byte 0x00
        .endm

#define CYGPKG_HAL_MN10300_DIAG_DEFINED

#endif  

#------------------------------------------------------------------------------
# Monitor initialization.
        
#ifndef CYGPKG_HAL_MN10300_MON_DEFINED

        .macro  hal_mon_init
        hal_mon_init_vectors
        hal_mon_init_vsr
        .endm

#if defined(CYG_HAL_STARTUP_ROM) ||             \
    defined(CYGPKG_HAL_MN10300_AM31_SIM)
        .macro  hal_mon_init_vectors
        mov     _mn10300_interrupt_vectors,a0
        mov     __hardware_vector_0,d0
        movhu   d0,(0,a0)
        mov     __hardware_vector_1,d0
        movhu   d0,(4,a0)
        mov     __hardware_vector_2,d0
        movhu   d0,(8,a0)
        mov     __hardware_vector_3,d0
        movhu   d0,(12,a0)
        mov     __hardware_vector_4,d0
        movhu   d0,(16,a0)
        mov     __hardware_vector_5,d0
        movhu   d0,(20,a0)
        mov     __hardware_vector_6,d0
        movhu   d0,(24,a0)
        .endm
#else
        .macro  hal_mon_init_vectors
        .endm
#endif
        
#if defined(CYG_HAL_STARTUP_RAM)

        # init vsr table in SRAM where the ROM
        # vectors the interrupts.

        .macro  hal_mon_init_vsr
        mov     _hal_vsr_table,a0
        mov     __default_interrupt_vsr,d0
        mov     d0,(0,a0)       
        mov     d0,(4,a0)
        mov     d0,(8,a0)
#ifndef CYGSEM_HAL_USE_ROM_MONITOR_CygMon
        # When using Cygmon, leave level 3 for GDB
        # Ctrl-C interrupts.
        mov     d0,(12,a0)      
#endif  
        mov     d0,(16,a0)      
        mov     d0,(20,a0)      
        mov     d0,(24,a0)
        mov     __default_nmi_vsr,d0
        mov     d0,(28,a0)
        mov     __default_trap_vsr,d0
        mov     d0,(32,a0)
        .endm

#else
        .macro  hal_mon_init_vsr
        .endm
#endif

#if !(defined(CYG_HAL_STARTUP_ROM)              || \
        defined(CYGPKG_HAL_MN10300_AM31_SIM)    || \
        !defined(CYGSEM_HAL_USE_ROM_MONITOR))

#define CYG_HAL_MN10300_VSR_TABLE_DEFINED

#endif



#define CYGPKG_HAL_MN10300_MON_DEFINED

#endif  



#------------------------------------------------------------------------------
#endif // ifndef CYGONCE_HAL_VARIANT_INC
# end of variant.inc