sim/cris/dv-cris_900000xx.c

   1 /* Handle 0x900000xx addresses in the sim.
   2
   3    Copyright (C) 2004-2023 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 /* This must come before any other includes.  */
  22 #include "defs.h"
  23
  24 #include "sim-main.h"
  25 #include "hw-main.h"
  26
  27 struct cris_900000xx_hw
  28 {
  29 };
  30
  31 static unsigned
  32 cris_io_write_buffer (struct hw *me, const void *source,
  33                       int space, address_word addr, unsigned nr_bytes)
  34 {
  35   static const unsigned char ok[] = { 4, 0, 0, 0x90};
  36   static const unsigned char bad[] = { 8, 0, 0, 0x90};
  37   SIM_CPU *cpu = hw_system_cpu (me);
  38   SIM_DESC sd = CPU_STATE (cpu);
  39   sim_cia cia = CPU_PC_GET (cpu);
  40
  41   if (addr == 0x90000004 && memcmp (source, ok, sizeof ok) == 0)
  42     return cris_break_13_handler (cpu, 1, 0, 0, 0, 0, 0, 0, cia);
  43   else if (addr == 0x90000008
  44            && memcmp (source, bad, sizeof bad) == 0)
  45     return cris_break_13_handler (cpu, 1, 34, 0, 0, 0, 0, 0, cia);
  46
  47   /* If it wasn't one of those, send an invalid-memory signal.  */
  48   sim_core_signal (sd, cpu, cia, 0, nr_bytes, addr,
  49                    write_transfer, sim_core_unmapped_signal);
  50
  51   return 0;
  52 }
  53
  54 /* Instance initializer function.  */
  55
  56 static void
  57 attach_regs (struct hw *me, struct cris_900000xx_hw *hw)
  58 {
  59   address_word attach_address;
  60   int attach_space;
  61   unsigned attach_size;
  62   reg_property_spec reg;
  63
  64   if (hw_find_property (me, "reg") == NULL)
  65     hw_abort (me, "Missing \"reg\" property");
  66
  67   if (!hw_find_reg_array_property (me, "reg", 0, &reg))
  68     hw_abort (me, "\"reg\" property must contain three addr/size entries");
  69
  70   hw_unit_address_to_attach_address (hw_parent (me),
  71                                      &reg.address,
  72                                      &attach_space, &attach_address, me);
  73   hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
  74
  75   hw_attach_address (hw_parent (me),
  76                      0, attach_space, attach_address, attach_size, me);
  77 }
  78
  79 static void
  80 cris_900000xx_finish (struct hw *me)
  81 {
  82   struct cris_900000xx_hw *hw;
  83
  84   hw = HW_ZALLOC (me, struct cris_900000xx_hw);
  85   set_hw_data (me, hw);
  86   set_hw_io_write_buffer (me, cris_io_write_buffer);
  87
  88   attach_regs (me, hw);
  89 }
  90
  91 const struct hw_descriptor dv_cris_900000xx_descriptor[] = {
  92   { "cris_900000xx", cris_900000xx_finish, },
  93   { NULL },
  94 };