sim/m32r/dv-m32r_cache.c

   1 /* Handle cache related addresses.
   2
   3    Copyright (C) 1996-2018 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 #include "config.h"
  22
  23 #include "sim-main.h"
  24 #include "hw-main.h"
  25
  26 #include "dv-m32r_cache.h"
  27
  28 struct m32r_cache_hw
  29 {
  30 };
  31
  32 static unsigned
  33 cris_io_write_buffer (struct hw *me, const void *source,
  34                       int space, address_word addr, unsigned nr_bytes)
  35 {
  36   SIM_DESC sd = hw_system (me);
  37
  38 #if WITH_SCACHE
  39   /* MSPR support is deprecated but is kept in for upward compatibility
  40      with existing overlay support.  */
  41   switch (addr)
  42     {
  43     case MSPR_ADDR:
  44       if ((*(const char *) source & MSPR_PURGE) != 0)
  45         scache_flush (sd);
  46       break;
  47
  48     case MCCR_ADDR:
  49       if ((*(const char *) source & MCCR_CP) != 0)
  50         scache_flush (sd);
  51       break;
  52     }
  53 #endif
  54
  55   return nr_bytes;
  56 }
  57
  58 static void
  59 attach_regs (struct hw *me, struct m32r_cache_hw *hw)
  60 {
  61   address_word attach_address;
  62   int attach_space;
  63   unsigned attach_size;
  64   reg_property_spec reg;
  65
  66   if (hw_find_property (me, "reg") == NULL)
  67     hw_abort (me, "Missing \"reg\" property");
  68
  69   if (!hw_find_reg_array_property (me, "reg", 0, &reg))
  70     hw_abort (me, "\"reg\" property must contain three addr/size entries");
  71
  72   hw_unit_address_to_attach_address (hw_parent (me),
  73                                      &reg.address,
  74                                      &attach_space, &attach_address, me);
  75   hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
  76
  77   hw_attach_address (hw_parent (me),
  78                      0, attach_space, attach_address, attach_size, me);
  79 }
  80
  81 static void
  82 m32r_cache_finish (struct hw *me)
  83 {
  84   struct m32r_cache_hw *hw;
  85
  86   hw = HW_ZALLOC (me, struct m32r_cache_hw);
  87   set_hw_data (me, hw);
  88   set_hw_io_write_buffer (me, cris_io_write_buffer);
  89
  90   attach_regs (me, hw);
  91 }
  92
  93 const struct hw_descriptor dv_m32r_cache_descriptor[] = {
  94   { "m32r_cache", m32r_cache_finish, },
  95   { NULL },
  96 };