sim/bfin/dv-bfin_evt.c

   1 /* Blackfin Event Vector Table (EVT) model.
   2
   3    Copyright (C) 2010-2011 Free Software Foundation, Inc.
   4    Contributed by Analog Devices, Inc.
   5
   6    This file is part of 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 "devices.h"
  25 #include "dv-bfin_cec.h"
  26 #include "dv-bfin_evt.h"
  27
  28 struct bfin_evt
  29 {
  30   bu32 base;
  31
  32   /* Order after here is important -- matches hardware MMR layout.  */
  33   bu32 evt[16];
  34 };
  35 #define mmr_base()      offsetof(struct bfin_evt, evt[0])
  36 #define mmr_offset(mmr) (offsetof(struct bfin_evt, mmr) - mmr_base())
  37
  38 static const char * const mmr_names[] = {
  39   "EVT0", "EVT1", "EVT2", "EVT3", "EVT4", "EVT5", "EVT6", "EVT7", "EVT8",
  40   "EVT9", "EVT10", "EVT11", "EVT12", "EVT13", "EVT14", "EVT15",
  41 };
  42 #define mmr_name(off) mmr_names[(off) / 4]
  43
  44 static unsigned
  45 bfin_evt_io_write_buffer (struct hw *me, const void *source,
  46                           int space, address_word addr, unsigned nr_bytes)
  47 {
  48   struct bfin_evt *evt = hw_data (me);
  49   bu32 mmr_off;
  50   bu32 value;
  51
  52   value = dv_load_4 (source);
  53   mmr_off = addr - evt->base;
  54
  55   HW_TRACE_WRITE ();
  56
  57   evt->evt[mmr_off / 4] = value;
  58
  59   return nr_bytes;
  60 }
  61
  62 static unsigned
  63 bfin_evt_io_read_buffer (struct hw *me, void *dest,
  64                          int space, address_word addr, unsigned nr_bytes)
  65 {
  66   struct bfin_evt *evt = hw_data (me);
  67   bu32 mmr_off;
  68   bu32 value;
  69
  70   mmr_off = addr - evt->base;
  71
  72   HW_TRACE_READ ();
  73
  74   value = evt->evt[mmr_off / 4];
  75
  76   dv_store_4 (dest, value);
  77
  78   return nr_bytes;
  79 }
  80
  81 static void
  82 attach_bfin_evt_regs (struct hw *me, struct bfin_evt *evt)
  83 {
  84   address_word attach_address;
  85   int attach_space;
  86   unsigned attach_size;
  87   reg_property_spec reg;
  88
  89   if (hw_find_property (me, "reg") == NULL)
  90     hw_abort (me, "Missing \"reg\" property");
  91
  92   if (!hw_find_reg_array_property (me, "reg", 0, &reg))
  93     hw_abort (me, "\"reg\" property must contain three addr/size entries");
  94
  95   hw_unit_address_to_attach_address (hw_parent (me),
  96                                      &reg.address,
  97                                      &attach_space, &attach_address, me);
  98   hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
  99
 100   if (attach_size != BFIN_COREMMR_EVT_SIZE)
 101     hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_EVT_SIZE);
 102
 103   hw_attach_address (hw_parent (me),
 104                      0, attach_space, attach_address, attach_size, me);
 105
 106   evt->base = attach_address;
 107 }
 108
 109 static void
 110 bfin_evt_finish (struct hw *me)
 111 {
 112   struct bfin_evt *evt;
 113
 114   evt = HW_ZALLOC (me, struct bfin_evt);
 115
 116   set_hw_data (me, evt);
 117   set_hw_io_read_buffer (me, bfin_evt_io_read_buffer);
 118   set_hw_io_write_buffer (me, bfin_evt_io_write_buffer);
 119
 120   attach_bfin_evt_regs (me, evt);
 121 }
 122
 123 const struct hw_descriptor dv_bfin_evt_descriptor[] = {
 124   {"bfin_evt", bfin_evt_finish,},
 125   {NULL, NULL},
 126 };
 127
 128 #define EVT_STATE(cpu) DV_STATE_CACHED (cpu, evt)
 129
 130 void
 131 cec_set_evt (SIM_CPU *cpu, int ivg, bu32 handler_addr)
 132 {
 133   if (ivg > IVG15 || ivg < 0)
 134     sim_io_error (CPU_STATE (cpu), "%s: ivg %i out of range !", __func__, ivg);
 135
 136   EVT_STATE (cpu)->evt[ivg] = handler_addr;
 137 }
 138
 139 bu32
 140 cec_get_evt (SIM_CPU *cpu, int ivg)
 141 {
 142   if (ivg > IVG15 || ivg < 0)
 143     sim_io_error (CPU_STATE (cpu), "%s: ivg %i out of range !", __func__, ivg);
 144
 145   return EVT_STATE (cpu)->evt[ivg];
 146 }
 147
 148 bu32
 149 cec_get_reset_evt (SIM_CPU *cpu)
 150 {
 151   /* XXX: This should tail into the model to get via BMODE pins.  */
 152   return 0xef000000;
 153 }