sim/cris/devices.c

   1 /* CRIS device support
   2    Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
   3    Contributed by Axis Communications.
   4
   5 This file is part of the GNU simulators.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 /* Based on the i960 devices.c (for the purposes, the same as all the
  22    others).  */
  23
  24 #include "sim-main.h"
  25
  26 #ifdef HAVE_DV_SOCKSER
  27 #include "dv-sockser.h"
  28 #endif
  29
  30 #include "hw-device.h"
  31
  32 /* Placeholder definition.  */
  33 struct _device { char dummy; } cris_devices;
  34
  35 void
  36 device_error (device *me ATTRIBUTE_UNUSED,
  37               char *message ATTRIBUTE_UNUSED,
  38               ...)
  39 {
  40   abort ();
  41 }
  42
  43 int
  44 device_io_read_buffer (device *me ATTRIBUTE_UNUSED,
  45                        void *source ATTRIBUTE_UNUSED,
  46                        int space ATTRIBUTE_UNUSED,
  47                        address_word addr ATTRIBUTE_UNUSED,
  48                        unsigned nr_bytes ATTRIBUTE_UNUSED,
  49                        SIM_DESC sd ATTRIBUTE_UNUSED,
  50                        SIM_CPU *cpu ATTRIBUTE_UNUSED,
  51                        sim_cia cia ATTRIBUTE_UNUSED)
  52 {
  53 #if WITH_HW
  54   return hw_io_read_buffer ((struct hw *) me, source, space, addr, nr_bytes);
  55 #else
  56   abort ();
  57 #endif
  58 }
  59
  60 int
  61 device_io_write_buffer (device *me ATTRIBUTE_UNUSED,
  62                         const void *source,
  63                         int space ATTRIBUTE_UNUSED,
  64                         address_word addr, unsigned nr_bytes,
  65                         SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)
  66 {
  67   static const unsigned char ok[] = { 4, 0, 0, 0x90};
  68   static const unsigned char bad[] = { 8, 0, 0, 0x90};
  69
  70   if (cris_have_900000xxif)
  71     {
  72       if (addr == 0x90000004 && memcmp (source, ok, sizeof ok) == 0)
  73         return cris_break_13_handler (cpu, 1, 0, 0, 0, 0, 0, 0, cia);
  74       else if (addr == 0x90000008
  75                && memcmp (source, bad, sizeof bad) == 0)
  76         return cris_break_13_handler (cpu, 1, 34, 0, 0, 0, 0, 0, cia);
  77     }
  78 #if WITH_HW
  79   else
  80     return hw_io_write_buffer ((struct hw *) me, source, space, addr, nr_bytes);
  81 #endif
  82
  83   /* If it wasn't one of those, send an invalid-memory signal.  */
  84   sim_core_signal (sd, cpu, cia, 0, nr_bytes, addr,
  85                    write_transfer, sim_core_unmapped_signal);
  86
  87   return 0;
  88 }