sim/m32r/dv-m32r_cache.c

   1 /* Handle cache related addresses.
   2
   3    Copyright (C) 1996-2021 Free Software Foundation, Inc.
   4    Contributed by Cygnus Solutions and Mike Frysinger.
   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 #include "dv-m32r_cache.h"
  28
  29 struct m32r_cache_hw
  30 {
  31 };
  32
  33 static unsigned
  34 cris_io_write_buffer (struct hw *me, const void *source,
  35                       int space, address_word addr, unsigned nr_bytes)
  36 {
  37   SIM_DESC sd = hw_system (me);
  38
  39 #if WITH_SCACHE
  40   /* MSPR support is deprecated but is kept in for upward compatibility
  41      with existing overlay support.  */
  42   switch (addr)
  43     {
  44     case MSPR_ADDR:
  45       if ((*(const char *) source & MSPR_PURGE) != 0)
  46         scache_flush (sd);
  47       break;
  48
  49     case MCCR_ADDR:
  50       if ((*(const char *) source & MCCR_CP) != 0)
  51         scache_flush (sd);
  52       break;
  53     }
  54 #endif
  55
  56   return nr_bytes;
  57 }
  58
  59 static void
  60 attach_regs (struct hw *me, struct m32r_cache_hw *hw)
  61 {
  62   address_word attach_address;
  63   int attach_space;
  64   unsigned attach_size;
  65   reg_property_spec reg;
  66
  67   if (hw_find_property (me, "reg") == NULL)
  68     hw_abort (me, "Missing \"reg\" property");
  69
  70   if (!hw_find_reg_array_property (me, "reg", 0, &reg))
  71     hw_abort (me, "\"reg\" property must contain three addr/size entries");
  72
  73   hw_unit_address_to_attach_address (hw_parent (me),
  74                                      &reg.address,
  75                                      &attach_space, &attach_address, me);
  76   hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
  77
  78   hw_attach_address (hw_parent (me),
  79                      0, attach_space, attach_address, attach_size, me);
  80 }
  81
  82 static void
  83 m32r_cache_finish (struct hw *me)
  84 {
  85   struct m32r_cache_hw *hw;
  86
  87   hw = HW_ZALLOC (me, struct m32r_cache_hw);
  88   set_hw_data (me, hw);
  89   set_hw_io_write_buffer (me, cris_io_write_buffer);
  90
  91   attach_regs (me, hw);
  92 }
  93
  94 const struct hw_descriptor dv_m32r_cache_descriptor[] = {
  95   { "m32r_cache", m32r_cache_finish, },
  96   { NULL },
  97 };