sim/bfin/dv-bfin_pfmon.c

   1 /* Blackfin Performance Monitor model.
   2
   3    Copyright (C) 2010-2024 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 /* This must come before any other includes.  */
  22 #include "defs.h"
  23
  24 #include "sim-main.h"
  25 #include "devices.h"
  26 #include "dv-bfin_pfmon.h"
  27
  28 /* XXX: This is mostly a stub.  */
  29
  30 struct bfin_pfmon
  31 {
  32   bu32 base;
  33
  34   /* Order after here is important -- matches hardware MMR layout.  */
  35   bu32 ctl;
  36   bu32 _pad0[63];
  37   bu32 cntr0, cntr1;
  38 };
  39 #define mmr_base()      offsetof(struct bfin_pfmon, ctl)
  40 #define mmr_offset(mmr) (offsetof(struct bfin_pfmon, mmr) - mmr_base())
  41
  42 static const char * const mmr_names[] =
  43 {
  44   "PFCTL", [mmr_offset (cntr0)] = "PFCNTR0", "PFCNTR1",
  45 };
  46 #define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>")
  47
  48 static unsigned
  49 bfin_pfmon_io_write_buffer (struct hw *me, const void *source, int space,
  50                             address_word addr, unsigned nr_bytes)
  51 {
  52   struct bfin_pfmon *pfmon = hw_data (me);
  53   bu32 mmr_off;
  54   bu32 value;
  55   bu32 *valuep;
  56
  57   /* Invalid access mode is higher priority than missing register.  */
  58   if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, true))
  59     return 0;
  60
  61   value = dv_load_4 (source);
  62   mmr_off = addr - pfmon->base;
  63   valuep = (void *)((uintptr_t)pfmon + mmr_base() + mmr_off);
  64
  65   HW_TRACE_WRITE ();
  66
  67   switch (mmr_off)
  68     {
  69     case mmr_offset(ctl):
  70     case mmr_offset(cntr0):
  71     case mmr_offset(cntr1):
  72       *valuep = value;
  73       break;
  74     default:
  75       dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
  76       return 0;
  77     }
  78
  79   return nr_bytes;
  80 }
  81
  82 static unsigned
  83 bfin_pfmon_io_read_buffer (struct hw *me, void *dest, int space,
  84                            address_word addr, unsigned nr_bytes)
  85 {
  86   struct bfin_pfmon *pfmon = hw_data (me);
  87   bu32 mmr_off;
  88   bu32 value;
  89   bu32 *valuep;
  90
  91   /* Invalid access mode is higher priority than missing register.  */
  92   if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, false))
  93     return 0;
  94
  95   mmr_off = addr - pfmon->base;
  96   valuep = (void *)((uintptr_t)pfmon + mmr_base() + mmr_off);
  97
  98   HW_TRACE_READ ();
  99
 100   switch (mmr_off)
 101     {
 102     case mmr_offset(ctl):
 103     case mmr_offset(cntr0):
 104     case mmr_offset(cntr1):
 105       value = *valuep;
 106       break;
 107     default:
 108       dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
 109       return 0;
 110     }
 111
 112   dv_store_4 (dest, value);
 113
 114   return nr_bytes;
 115 }
 116
 117 static void
 118 attach_bfin_pfmon_regs (struct hw *me, struct bfin_pfmon *pfmon)
 119 {
 120   address_word attach_address;
 121   int attach_space;
 122   unsigned attach_size;
 123   reg_property_spec reg;
 124
 125   if (hw_find_property (me, "reg") == NULL)
 126     hw_abort (me, "Missing \"reg\" property");
 127
 128   if (!hw_find_reg_array_property (me, "reg", 0, &reg))
 129     hw_abort (me, "\"reg\" property must contain three addr/size entries");
 130
 131   hw_unit_address_to_attach_address (hw_parent (me),
 132                                      &reg.address,
 133                                      &attach_space, &attach_address, me);
 134   hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
 135
 136   if (attach_size != BFIN_COREMMR_PFMON_SIZE)
 137     hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_PFMON_SIZE);
 138
 139   hw_attach_address (hw_parent (me),
 140                      0, attach_space, attach_address, attach_size, me);
 141
 142   pfmon->base = attach_address;
 143 }
 144
 145 static void
 146 bfin_pfmon_finish (struct hw *me)
 147 {
 148   struct bfin_pfmon *pfmon;
 149
 150   pfmon = HW_ZALLOC (me, struct bfin_pfmon);
 151
 152   set_hw_data (me, pfmon);
 153   set_hw_io_read_buffer (me, bfin_pfmon_io_read_buffer);
 154   set_hw_io_write_buffer (me, bfin_pfmon_io_write_buffer);
 155
 156   attach_bfin_pfmon_regs (me, pfmon);
 157 }
 158
 159 const struct hw_descriptor dv_bfin_pfmon_descriptor[] =
 160 {
 161   {"bfin_pfmon", bfin_pfmon_finish,},
 162   {NULL, NULL},
 163 };