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 #
 # GDB Init script for the Coldfire 5206e processor.
 #
 # The main purpose of this script is to perform minimum initialization of
 # processor so code can be loaded. Also, exception handling is performed.
 # 
 
 # Copyright (C) OKTET Ltd., St.-Petersburg, Russia
 # Author: Victor V. Vengerov <vvv@oktet.ru>
 #
 # This script partially based on gdb scripts written by 
 # Eric Norum, <eric@norum.ca>
 #
 # The license and distribution terms for this file may be
 # found in the file LICENSE in this distribution or at
 # http://www.rtems.org/license/LICENSE.
 #
 
 define addresses
 
 set $mbar  = 0x10000001
 set $simr  = $mbar - 1 + 0x003
 set $icr1  = $mbar - 1 + 0x014
 set $icr2  = $mbar - 1 + 0x015
 set $icr3  = $mbar - 1 + 0x016
 set $icr4  = $mbar - 1 + 0x017
 set $icr5  = $mbar - 1 + 0x018
 set $icr6  = $mbar - 1 + 0x019
 set $icr7  = $mbar - 1 + 0x01A
 set $icr8  = $mbar - 1 + 0x01B
 set $icr9  = $mbar - 1 + 0x01C
 set $icr10 = $mbar - 1 + 0x01D
 set $icr11 = $mbar - 1 + 0x01E
 set $icr12 = $mbar - 1 + 0x01F
 set $icr13 = $mbar - 1 + 0x020
 set $imr   = $mbar - 1 + 0x036
 set $ipr   = $mbar - 1 + 0x03A
 set $rsr   = $mbar - 1 + 0x040
 set $sypcr = $mbar - 1 + 0x041
 set $swivr = $mbar - 1 + 0x042
 set $swsr  = $mbar - 1 + 0x043
 set $dcrr  = $mbar - 1 + 0x046
 set $dctr  = $mbar - 1 + 0x04A
 set $dcar0 = $mbar - 1 + 0x04C
 set $dcmr0 = $mbar - 1 + 0x050
 set $dccr0 = $mbar - 1 + 0x057
 set $dcar1 = $mbar - 1 + 0x058
 set $dcmr1 = $mbar - 1 + 0x05C
 set $dccr1 = $mbar - 1 + 0x063
 set $csar0 = $mbar - 1 + 0x064
 set $csmr0 = $mbar - 1 + 0x068
 set $cscr0 = $mbar - 1 + 0x06E
 set $csar1 = $mbar - 1 + 0x070
 set $csmr1 = $mbar - 1 + 0x074
 set $cscr1 = $mbar - 1 + 0x07A
 set $csar2 = $mbar - 1 + 0x07C
 set $csmr2 = $mbar - 1 + 0x080
 set $cscr2 = $mbar - 1 + 0x086
 set $csar3 = $mbar - 1 + 0x088
 set $csmr3 = $mbar - 1 + 0x08C
 set $cscr3 = $mbar - 1 + 0x092
 set $csar4 = $mbar - 1 + 0x094
 set $csmr4 = $mbar - 1 + 0x098
 set $cscr4 = $mbar - 1 + 0x09E
 set $csar5 = $mbar - 1 + 0x0A0
 set $csmr5 = $mbar - 1 + 0x0A4
 set $cscr5 = $mbar - 1 + 0x0AA
 set $csar6 = $mbar - 1 + 0x0AC
 set $csmr6 = $mbar - 1 + 0x0B0
 set $cscr6 = $mbar - 1 + 0x0B6
 set $csar7 = $mbar - 1 + 0x0B8
 set $csmr7 = $mbar - 1 + 0x0BC
 set $cscr7 = $mbar - 1 + 0x0C2
 set $dmcr  = $mbar - 1 + 0x0C6
 set $par   = $mbar - 1 + 0x0CA
 set $tmr1  = $mbar - 1 + 0x100
 set $trr1  = $mbar - 1 + 0x104
 set $tcr1  = $mbar - 1 + 0x108
 set $tcn1  = $mbar - 1 + 0x10C
 set $ter1  = $mbar - 1 + 0x111
 set $tmr2  = $mbar - 1 + 0x120
 set $trr2  = $mbar - 1 + 0x124
 set $tcr2  = $mbar - 1 + 0x128
 set $tcn2  = $mbar - 1 + 0x12C
 set $ter2  = $mbar - 1 + 0x131
 
 end
 
 #
 #  Setup CSAR0 for the FLASH ROM.
 #
 
 define setup-cs
 
 set *((short*) $csar0) = 0xffe0
 set *((int*)   $csmr0) = 0x000f0000
 set *((short*) $cscr0) = 0x1da3
 set *((short*) $csar1) = 0x5000
 set *((int*)   $csmr1) = 0x00000000
 set *((short*) $cscr1) = 0x3d43
 set *((short*) $csar2) = 0x3000
 set *((int*)   $csmr2) = 0x000f0000
 set *((short*) $cscr2) = 0x1903
 set *((short*) $csar3) = 0x4000
 set *((int*)   $csmr3) = 0x000f0000
 set *((short*) $cscr3) = 0x0083
 
 end
 
 #
 # Setup the DRAM controller.
 #
 
 define setup-dram
 
 set *((short*) $dcrr)  = 24
 set *((short*) $dctr)  = 0x0000
 set *((short*) $dcar0) = 0x0000
 set *((long*)  $dcmr0) = 0x000e0000
 set *((char*)  $dccr0) = 0x07
 set *((short*) $dcar1) = 0x0000
 set *((long*)  $dcmr1) = 0x00000000
 set *((char*)  $dccr1) = 0x00
 
 end
 
 
 #
 # Wake up the board
 #
 
 define initboard
 
 addresses
 setup-cs
 # setup-dram
 
 end
 
 define ss
 si
 x/i $pc
 end
 
 #
 # Display exception information
 #
 define exception-info
 set $excpc = *(unsigned int *)($sp+4)
 set $excfmt = (*(unsigned int *)$sp >> 28) & 0x0f
 set $excfs = ((*(unsigned int *)$sp >> 24) & 0x0c) | \
              ((*(unsigned int *)$sp >> 16) & 0x03)
 set $excvec = (*(unsigned int *)$sp >> 18) & 0xff
 set $excsr = *(unsigned int *)$sp & 0xffff
 
 printf "EXCEPTION -- SR:0x%X  PC:0x%X  FRAME:0x%X VECTOR:%d\n", \
         $excsr, $excpc, $sp, $excvec
 if $excvec == 2
     printf "Access error exception"
 end
 if $excvec == 3
     printf "Address error exception"
 end
 if $excvec == 4
     printf "Illegal instruction exception"
 end
 if $excvec == 8
     printf "Privelege violation exception"
 end
 if $excvec == 9
     printf "Trace exception"
 end
 if $excvec == 10
     printf "Unimplemented LINE-A opcode exception"
 end
 if $excvec == 11
     printf "Unimplemented LINE-F opcode exception"
 end
 if $excvec == 12
     printf "Debug interrupt"
 end
 if $excvec == 14
     printf "Format error exception"
 end
 if $excfs == 0x04
     printf " on instruction fetch"
 end
 if $excfs == 0x08
     printf " on operand write"
 end
 if $excfs == 0x09
     printf " on write to write-protected space"
 end
 if $excfs == 0x0c
     printf " on operand read"
 end
 printf "\n"
 x/4i $excpc
 set $pc=$excpc
 set $sp=$sp+8
 end
 
 target bdm /dev/bdmcf0
 initboard
 load
 set $pc=start
 set $sp=0x20001ffc
 b bsp_cleanup
 b _stop
 b _unexp_exception
 commands
 silent
 exception-info
 end
 b _unexp_int
 b _reserved_int
 b _spurious_int

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