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##=============================================================================
##
##      edk.S
##
##      EDK board hardware setup
##
##=============================================================================
## ####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):   jskov
## Contributors:jskov
## Date:        1999-05-03
## Purpose:     EDK7708 board hardware setup
## Description: This file contains any code needed to initialize the
##              hardware on a Hitachi SH3 EDK7708 board.
##
######DESCRIPTIONEND####
##
##=============================================================================

#include <pkgconf/hal.h>
#include <cyg/hal/sh_regs.h>

        .globl  _hal_hardware_init
_hal_hardware_init:

        // Set up the Bus State Controller
        mov.l    $BSC_settings_table,r3
1:      mov.w    @r3+,r0                // Address (or zero)
        cmp/eq   #0,r0
        bt       2f
        mov.w    @r3+,r1                // data
        bra      1b
         mov.w    r1,@r0                // delay slot

2:
        rts
         nop

        .align  2
$BSC_settings_table:
        .long   BSC_settings_table
BSC_settings_table:
        # These are the settings set by the Hitachi ROM Monitor.

        # BCR2: Bus size of areas 1-6 to 32 bits
        .word   CYGARC_REG_BCR2
        .word   0x3ffc
        # BCR1: Areas 2 and 3 are SDRAM
        .word   CYGARC_REG_BCR1
        .word   0x080c
        # BCR2: Bus size of areas 1-6 to 32 bits [note: second write!]
        .word   CYGARC_REG_BCR2
        .word   0x3ffc
        # WCR1: 3 wait-state cycles inserted for all areas
        .word   CYGARC_REG_WCR1
        .word   0x3fff
        # WCR2: extra wait states and full pitch for burst
        .word   CYGARC_REG_WCR2
        .word   0xffd7
        # MCR: RAS/CAS & burst timing area 2/3
        .word   CYGARC_REG_MCR
        .word   0x963c
#if 0
        # DCR: RAS/CAS & burst timing area 2
        .word   CYGARC_REG_DCR
        .word   0x0000
        # PCR: PCMCIA disabled
        .word   CYGARC_REG_PCR
        .word   0x0000
#endif
        # RTCNT: refresh counter (needs a5 in top byte to accept write)
        .word   CYGARC_REG_RTCNT
        .word   (0xa500 | 0x0000)
        # RTCOR: refresh time constant (needs a5 in top byte to accept write)
        .word   CYGARC_REG_RTCOR
        .word   (0xa500 | 0x003b)
        # RFCR:  refresh count register (needs a4 in top byte to accept write)
        .word   CYGARC_REG_RFCR
        .word   (0xa400 | 0x0000)
        # RTCSR: refresh timer control (needs a5 in top byte to accept write)
        .word   CYGARC_REG_RTCSR
        .word   (0xa500 | 0x0008)

        # Set SDMR to 0x220
        .word    0xd880
        .word    0       
        
        # Table end
        .word   0

#------------------------------------------------------------------------------
# end of edk.S