sim/bfin/dv-bfin_ebiu_ddrc.c

   1 /* Blackfin External Bus Interface Unit (EBIU) DDR Controller (DDRC) 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_ebiu_ddrc.h"
  26
  27 struct bfin_ebiu_ddrc
  28 {
  29   bu32 base, reg_size, bank_size;
  30
  31   /* Order after here is important -- matches hardware MMR layout.  */
  32   union {
  33     struct { bu32 ddrctl0, ddrctl1, ddrctl2, ddrctl3; };
  34     bu32 ddrctl[4];
  35   };
  36   bu32 ddrque, erradd;
  37   bu16 BFIN_MMR_16(errmst);
  38   bu16 BFIN_MMR_16(rstctl);
  39   bu32 ddrbrc[8], ddrbwc[8];
  40   bu32 ddracct, ddrtact, ddrarct;
  41   bu32 ddrgc[4];
  42   bu32 ddrmcen, ddrmccl;
  43 };
  44 #define mmr_base()      offsetof(struct bfin_ebiu_ddrc, ddrctl0)
  45 #define mmr_offset(mmr) (offsetof(struct bfin_ebiu_ddrc, mmr) - mmr_base())
  46
  47 static const char * const mmr_names[] = {
  48   "EBIU_DDRCTL0", "EBIU_DDRCTL1", "EBIU_DDRCTL2", "EBIU_DDRCTL3", "EBIU_DDRQUE",
  49   "EBIU_ERRADD", "EBIU_ERRMST", "EBIU_RSTCTL", "EBIU_DDRBRC0", "EBIU_DDRBRC1",
  50   "EBIU_DDRBRC2", "EBIU_DDRBRC3", "EBIU_DDRBRC4", "EBIU_DDRBRC5",
  51   "EBIU_DDRBRC6", "EBIU_DDRBRC7", "EBIU_DDRBWC0", "EBIU_DDRBWC1"
  52   "EBIU_DDRBWC2", "EBIU_DDRBWC3", "EBIU_DDRBWC4", "EBIU_DDRBWC5",
  53   "EBIU_DDRBWC6", "EBIU_DDRBWC7", "EBIU_DDRACCT", "EBIU_DDRTACT",
  54   "EBIU_ARCT", "EBIU_DDRGC0", "EBIU_DDRGC1", "EBIU_DDRGC2", "EBIU_DDRGC3",
  55   "EBIU_DDRMCEN", "EBIU_DDRMCCL",
  56 };
  57 #define mmr_name(off) mmr_names[(off) / 4]
  58
  59 static unsigned
  60 bfin_ebiu_ddrc_io_write_buffer (struct hw *me, const void *source,
  61                                int space, address_word addr, unsigned nr_bytes)
  62 {
  63   struct bfin_ebiu_ddrc *ddrc = hw_data (me);
  64   bu32 mmr_off;
  65   bu32 value;
  66   bu16 *value16p;
  67   bu32 *value32p;
  68   void *valuep;
  69
  70   if (nr_bytes == 4)
  71     value = dv_load_4 (source);
  72   else
  73     value = dv_load_2 (source);
  74
  75   mmr_off = addr - ddrc->base;
  76   valuep = (void *)((unsigned long)ddrc + mmr_base() + mmr_off);
  77   value16p = valuep;
  78   value32p = valuep;
  79
  80   HW_TRACE_WRITE ();
  81
  82   switch (mmr_off)
  83     {
  84     case mmr_offset(errmst):
  85     case mmr_offset(rstctl):
  86       dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
  87       *value16p = value;
  88       break;
  89     default:
  90       dv_bfin_mmr_require_32 (me, addr, nr_bytes, true);
  91       *value32p = value;
  92       break;
  93     }
  94
  95   return nr_bytes;
  96 }
  97
  98 static unsigned
  99 bfin_ebiu_ddrc_io_read_buffer (struct hw *me, void *dest,
 100                               int space, address_word addr, unsigned nr_bytes)
 101 {
 102   struct bfin_ebiu_ddrc *ddrc = hw_data (me);
 103   bu32 mmr_off;
 104   bu32 *value32p;
 105   bu16 *value16p;
 106   void *valuep;
 107
 108   mmr_off = addr - ddrc->base;
 109   valuep = (void *)((unsigned long)ddrc + mmr_base() + mmr_off);
 110   value16p = valuep;
 111   value32p = valuep;
 112
 113   HW_TRACE_READ ();
 114
 115   switch (mmr_off)
 116     {
 117     case mmr_offset(errmst):
 118     case mmr_offset(rstctl):
 119       dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
 120       dv_store_2 (dest, *value16p);
 121       break;
 122     default:
 123       dv_bfin_mmr_require_32 (me, addr, nr_bytes, false);
 124       dv_store_4 (dest, *value32p);
 125       break;
 126     }
 127
 128   return nr_bytes;
 129 }
 130
 131 static void
 132 attach_bfin_ebiu_ddrc_regs (struct hw *me, struct bfin_ebiu_ddrc *ddrc)
 133 {
 134   address_word attach_address;
 135   int attach_space;
 136   unsigned attach_size;
 137   reg_property_spec reg;
 138
 139   if (hw_find_property (me, "reg") == NULL)
 140     hw_abort (me, "Missing \"reg\" property");
 141
 142   if (!hw_find_reg_array_property (me, "reg", 0, &reg))
 143     hw_abort (me, "\"reg\" property must contain three addr/size entries");
 144
 145   hw_unit_address_to_attach_address (hw_parent (me),
 146                                      &reg.address,
 147                                      &attach_space, &attach_address, me);
 148   hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
 149
 150   if (attach_size != BFIN_MMR_EBIU_DDRC_SIZE)
 151     hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_EBIU_DDRC_SIZE);
 152
 153   hw_attach_address (hw_parent (me),
 154                      0, attach_space, attach_address, attach_size, me);
 155
 156   ddrc->base = attach_address;
 157 }
 158
 159 static void
 160 bfin_ebiu_ddrc_finish (struct hw *me)
 161 {
 162   struct bfin_ebiu_ddrc *ddrc;
 163
 164   ddrc = HW_ZALLOC (me, struct bfin_ebiu_ddrc);
 165
 166   set_hw_data (me, ddrc);
 167   set_hw_io_read_buffer (me, bfin_ebiu_ddrc_io_read_buffer);
 168   set_hw_io_write_buffer (me, bfin_ebiu_ddrc_io_write_buffer);
 169
 170   attach_bfin_ebiu_ddrc_regs (me, ddrc);
 171
 172   /* Initialize the DDRC.  */
 173   ddrc->ddrctl0 = 0x098E8411;
 174   ddrc->ddrctl1 = 0x10026223;
 175   ddrc->ddrctl2 = 0x00000021;
 176   ddrc->ddrctl3 = 0x00000003; /* XXX: MDDR is 0x20 ...  */
 177   ddrc->ddrque = 0x00001115;
 178   ddrc->rstctl = 0x0002;
 179 }
 180
 181 const struct hw_descriptor dv_bfin_ebiu_ddrc_descriptor[] = {
 182   {"bfin_ebiu_ddrc", bfin_ebiu_ddrc_finish,},
 183   {NULL, NULL},
 184 };