sim/cris/dv-cris_900000xx.c

   1 /* Handle 0x900000xx addresses in the sim.
   2
   3    Copyright (C) 2004-2020 Free Software Foundation, Inc.
   4    Contributed by Axis Communications.
   5
   6    This file is part of the GNU simulators.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "sim-main.h"
  22 #include "hw-main.h"
  23
  24 struct cris_900000xx_hw
  25 {
  26 };
  27
  28 static unsigned
  29 cris_io_write_buffer (struct hw *me, const void *source,
  30                       int space, address_word addr, unsigned nr_bytes)
  31 {
  32   static const unsigned char ok[] = { 4, 0, 0, 0x90};
  33   static const unsigned char bad[] = { 8, 0, 0, 0x90};
  34   SIM_CPU *cpu = hw_system_cpu (me);
  35   SIM_DESC sd = CPU_STATE (cpu);
  36   sim_cia cia = CPU_PC_GET (cpu);
  37
  38   if (addr == 0x90000004 && memcmp (source, ok, sizeof ok) == 0)
  39     return cris_break_13_handler (cpu, 1, 0, 0, 0, 0, 0, 0, cia);
  40   else if (addr == 0x90000008
  41            && memcmp (source, bad, sizeof bad) == 0)
  42     return cris_break_13_handler (cpu, 1, 34, 0, 0, 0, 0, 0, cia);
  43
  44   /* If it wasn't one of those, send an invalid-memory signal.  */
  45   sim_core_signal (sd, cpu, cia, 0, nr_bytes, addr,
  46                    write_transfer, sim_core_unmapped_signal);
  47
  48   return 0;
  49 }
  50
  51 /* Instance initializer function.  */
  52
  53 static void
  54 attach_regs (struct hw *me, struct cris_900000xx_hw *hw)
  55 {
  56   address_word attach_address;
  57   int attach_space;
  58   unsigned attach_size;
  59   reg_property_spec reg;
  60
  61   if (hw_find_property (me, "reg") == NULL)
  62     hw_abort (me, "Missing \"reg\" property");
  63
  64   if (!hw_find_reg_array_property (me, "reg", 0, &reg))
  65     hw_abort (me, "\"reg\" property must contain three addr/size entries");
  66
  67   hw_unit_address_to_attach_address (hw_parent (me),
  68                                      &reg.address,
  69                                      &attach_space, &attach_address, me);
  70   hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
  71
  72   hw_attach_address (hw_parent (me),
  73                      0, attach_space, attach_address, attach_size, me);
  74 }
  75
  76 static void
  77 cris_900000xx_finish (struct hw *me)
  78 {
  79   struct cris_900000xx_hw *hw;
  80
  81   hw = HW_ZALLOC (me, struct cris_900000xx_hw);
  82   set_hw_data (me, hw);
  83   set_hw_io_write_buffer (me, cris_io_write_buffer);
  84
  85   attach_regs (me, hw);
  86 }
  87
  88 const struct hw_descriptor dv_cris_900000xx_descriptor[] = {
  89   { "cris_900000xx", cris_900000xx_finish, },
  90   { NULL },
  91 };