sim/cris/devices.c

   1 /* CRIS device support
   2    Copyright (C) 2004-2012 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 3 of the License, or
  10 (at your option) 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
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* Based on the i960 devices.c (for the purposes, the same as all the
  21    others).  */
  22
  23 #include "sim-main.h"
  24
  25 #ifdef HAVE_DV_SOCKSER
  26 #include "dv-sockser.h"
  27 #endif
  28
  29 #include "hw-device.h"
  30
  31 /* Placeholder definition.  */
  32 struct _device { char dummy; } cris_devices;
  33
  34 void
  35 device_error (device *me ATTRIBUTE_UNUSED,
  36               const char *message ATTRIBUTE_UNUSED,
  37               ...)
  38 {
  39   abort ();
  40 }
  41
  42 int
  43 device_io_read_buffer (device *me ATTRIBUTE_UNUSED,
  44                        void *source ATTRIBUTE_UNUSED,
  45                        int space ATTRIBUTE_UNUSED,
  46                        address_word addr ATTRIBUTE_UNUSED,
  47                        unsigned nr_bytes ATTRIBUTE_UNUSED,
  48                        SIM_DESC sd ATTRIBUTE_UNUSED,
  49                        SIM_CPU *cpu ATTRIBUTE_UNUSED,
  50                        sim_cia cia ATTRIBUTE_UNUSED)
  51 {
  52 #if WITH_HW
  53   return hw_io_read_buffer ((struct hw *) me, source, space, addr, nr_bytes);
  54 #else
  55   abort ();
  56 #endif
  57 }
  58
  59 int
  60 device_io_write_buffer (device *me ATTRIBUTE_UNUSED,
  61                         const void *source,
  62                         int space ATTRIBUTE_UNUSED,
  63                         address_word addr, unsigned nr_bytes,
  64                         SIM_DESC sd, SIM_CPU *cpu, sim_cia cia)
  65 {
  66   static const unsigned char ok[] = { 4, 0, 0, 0x90};
  67   static const unsigned char bad[] = { 8, 0, 0, 0x90};
  68
  69   if (cris_have_900000xxif)
  70     {
  71       if (addr == 0x90000004 && memcmp (source, ok, sizeof ok) == 0)
  72         return cris_break_13_handler (cpu, 1, 0, 0, 0, 0, 0, 0, cia);
  73       else if (addr == 0x90000008
  74                && memcmp (source, bad, sizeof bad) == 0)
  75         return cris_break_13_handler (cpu, 1, 34, 0, 0, 0, 0, 0, cia);
  76     }
  77 #if WITH_HW
  78   else
  79     return hw_io_write_buffer ((struct hw *) me, source, space, addr, nr_bytes);
  80 #endif
  81
  82   /* If it wasn't one of those, send an invalid-memory signal.  */
  83   sim_core_signal (sd, cpu, cia, 0, nr_bytes, addr,
  84                    write_transfer, sim_core_unmapped_signal);
  85
  86   return 0;
  87 }