sim/bfin/dv-bfin_ebiu_amc.c

   1 /* Blackfin External Bus Interface Unit (EBIU) Asynchronous Memory Controller
   2    (AMC) model.
   3
   4    Copyright (C) 2010-2015 Free Software Foundation, Inc.
   5    Contributed by Analog Devices, Inc.
   6
   7    This file is part of simulators.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "config.h"
  23
  24 #include "sim-main.h"
  25 #include "devices.h"
  26 #include "dv-bfin_ebiu_amc.h"
  27
  28 struct bfin_ebiu_amc
  29 {
  30   bu32 base;
  31   int type;
  32   bu32 bank_base, bank_size;
  33   unsigned (*io_write) (struct hw *, const void *, int, address_word,
  34                         unsigned, struct bfin_ebiu_amc *, bu32, bu32);
  35   unsigned (*io_read) (struct hw *, void *, int, address_word, unsigned,
  36                        struct bfin_ebiu_amc *, bu32, void *, bu16 *, bu32 *);
  37   struct hw *slaves[4];
  38
  39   /* Order after here is important -- matches hardware MMR layout.  */
  40   bu16 BFIN_MMR_16(amgctl);
  41   union {
  42     struct {
  43       bu32 ambctl0, ambctl1;
  44       bu32 _pad0[5];
  45       bu16 BFIN_MMR_16(mode);
  46       bu16 BFIN_MMR_16(fctl);
  47     } bf50x;
  48     struct {
  49       bu32 ambctl0, ambctl1;
  50     } bf53x;
  51     struct {
  52       bu32 ambctl0, ambctl1;
  53       bu32 mbsctl, arbstat, mode, fctl;
  54     } bf54x;
  55   };
  56 };
  57 #define mmr_base()      offsetof(struct bfin_ebiu_amc, amgctl)
  58 #define mmr_offset(mmr) (offsetof(struct bfin_ebiu_amc, mmr) - mmr_base())
  59 #define mmr_idx(mmr)    (mmr_offset (mmr) / 4)
  60
  61 static const char * const bf50x_mmr_names[] =
  62 {
  63   "EBIU_AMGCTL", "EBIU_AMBCTL0", "EBIU_AMBCTL1",
  64   [mmr_idx (bf50x.mode)] = "EBIU_MODE", "EBIU_FCTL",
  65 };
  66 static const char * const bf53x_mmr_names[] =
  67 {
  68   "EBIU_AMGCTL", "EBIU_AMBCTL0", "EBIU_AMBCTL1",
  69 };
  70 static const char * const bf54x_mmr_names[] =
  71 {
  72   "EBIU_AMGCTL", "EBIU_AMBCTL0", "EBIU_AMBCTL1",
  73   "EBIU_MSBCTL", "EBIU_ARBSTAT", "EBIU_MODE", "EBIU_FCTL",
  74 };
  75 static const char * const *mmr_names;
  76 #define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>")
  77
  78 static void
  79 bfin_ebiu_amc_write_amgctl (struct hw *me, struct bfin_ebiu_amc *amc,
  80                             bu16 amgctl)
  81 {
  82   bu32 amben_old, amben, addr, i;
  83
  84   amben_old = MIN ((amc->amgctl >> 1) & 0x7, 4);
  85   amben = MIN ((amgctl >> 1) & 0x7, 4);
  86
  87   HW_TRACE ((me, "reattaching banks: AMGCTL 0x%04x[%u] -> 0x%04x[%u]",
  88              amc->amgctl, amben_old, amgctl, amben));
  89
  90   for (i = 0; i < 4; ++i)
  91     {
  92       addr = amc->bank_base + i * amc->bank_size;
  93
  94       if (i < amben_old)
  95         {
  96           HW_TRACE ((me, "detaching bank %u (%#x base)", i, addr));
  97           sim_core_detach (hw_system (me), NULL, 0, 0, addr);
  98         }
  99
 100       if (i < amben)
 101         {
 102           struct hw *slave = amc->slaves[i];
 103
 104           HW_TRACE ((me, "attaching bank %u (%#x base) to %s", i, addr,
 105                      slave ? hw_path (slave) : "<floating pins>"));
 106
 107           sim_core_attach (hw_system (me), NULL, 0, access_read_write_exec,
 108                            0, addr, amc->bank_size, 0, slave, NULL);
 109         }
 110     }
 111
 112   amc->amgctl = amgctl;
 113 }
 114
 115 static unsigned
 116 bf50x_ebiu_amc_io_write_buffer (struct hw *me, const void *source, int space,
 117                                 address_word addr, unsigned nr_bytes,
 118                                 struct bfin_ebiu_amc *amc, bu32 mmr_off,
 119                                 bu32 value)
 120 {
 121   switch (mmr_off)
 122     {
 123     case mmr_offset(amgctl):
 124       if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
 125         return 0;
 126       bfin_ebiu_amc_write_amgctl (me, amc, value);
 127       break;
 128     case mmr_offset(bf50x.ambctl0):
 129       amc->bf50x.ambctl0 = value;
 130       break;
 131     case mmr_offset(bf50x.ambctl1):
 132       amc->bf50x.ambctl1 = value;
 133       break;
 134     case mmr_offset(bf50x.mode):
 135       /* XXX: implement this.  */
 136       if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
 137         return 0;
 138       break;
 139     case mmr_offset(bf50x.fctl):
 140       /* XXX: implement this.  */
 141       if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
 142         return 0;
 143       break;
 144     default:
 145       dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
 146       return 0;
 147     }
 148
 149   return nr_bytes;
 150 }
 151
 152 static unsigned
 153 bf53x_ebiu_amc_io_write_buffer (struct hw *me, const void *source, int space,
 154                                 address_word addr, unsigned nr_bytes,
 155                                 struct bfin_ebiu_amc *amc, bu32 mmr_off,
 156                                 bu32 value)
 157 {
 158   switch (mmr_off)
 159     {
 160     case mmr_offset(amgctl):
 161       if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
 162         return 0;
 163       bfin_ebiu_amc_write_amgctl (me, amc, value);
 164       break;
 165     case mmr_offset(bf53x.ambctl0):
 166       amc->bf53x.ambctl0 = value;
 167       break;
 168     case mmr_offset(bf53x.ambctl1):
 169       amc->bf53x.ambctl1 = value;
 170       break;
 171     default:
 172       dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
 173       return 0;
 174     }
 175
 176   return nr_bytes;
 177 }
 178
 179 static unsigned
 180 bf54x_ebiu_amc_io_write_buffer (struct hw *me, const void *source, int space,
 181                                 address_word addr, unsigned nr_bytes,
 182                                 struct bfin_ebiu_amc *amc, bu32 mmr_off,
 183                                 bu32 value)
 184 {
 185   switch (mmr_off)
 186     {
 187     case mmr_offset(amgctl):
 188       if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
 189         return 0;
 190       bfin_ebiu_amc_write_amgctl (me, amc, value);
 191       break;
 192     case mmr_offset(bf54x.ambctl0):
 193       amc->bf54x.ambctl0 = value;
 194       break;
 195     case mmr_offset(bf54x.ambctl1):
 196       amc->bf54x.ambctl1 = value;
 197       break;
 198     case mmr_offset(bf54x.mbsctl):
 199       /* XXX: implement this.  */
 200       break;
 201     case mmr_offset(bf54x.arbstat):
 202       /* XXX: implement this.  */
 203       break;
 204     case mmr_offset(bf54x.mode):
 205       /* XXX: implement this.  */
 206       break;
 207     case mmr_offset(bf54x.fctl):
 208       /* XXX: implement this.  */
 209       break;
 210     default:
 211       dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
 212       return 0;
 213     }
 214
 215   return nr_bytes;
 216 }
 217
 218 static unsigned
 219 bfin_ebiu_amc_io_write_buffer (struct hw *me, const void *source, int space,
 220                                address_word addr, unsigned nr_bytes)
 221 {
 222   struct bfin_ebiu_amc *amc = hw_data (me);
 223   bu32 mmr_off;
 224   bu32 value;
 225
 226   /* Invalid access mode is higher priority than missing register.  */
 227   if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, true))
 228     return 0;
 229
 230   value = dv_load_4 (source);
 231   mmr_off = addr - amc->base;
 232
 233   HW_TRACE_WRITE ();
 234
 235   return amc->io_write (me, source, space, addr, nr_bytes,
 236                         amc, mmr_off, value);
 237 }
 238
 239 static unsigned
 240 bf50x_ebiu_amc_io_read_buffer (struct hw *me, void *dest, int space,
 241                                address_word addr, unsigned nr_bytes,
 242                                struct bfin_ebiu_amc *amc, bu32 mmr_off,
 243                                void *valuep, bu16 *value16, bu32 *value32)
 244 {
 245   switch (mmr_off)
 246     {
 247     case mmr_offset(amgctl):
 248     case mmr_offset(bf50x.fctl):
 249       if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, false))
 250         return 0;
 251       dv_store_2 (dest, *value16);
 252       break;
 253     case mmr_offset(bf50x.ambctl0):
 254     case mmr_offset(bf50x.ambctl1):
 255     case mmr_offset(bf50x.mode):
 256       dv_store_4 (dest, *value32);
 257       break;
 258     default:
 259       dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
 260       return 0;
 261     }
 262
 263   return nr_bytes;
 264 }
 265
 266 static unsigned
 267 bf53x_ebiu_amc_io_read_buffer (struct hw *me, void *dest, int space,
 268                                address_word addr, unsigned nr_bytes,
 269                                struct bfin_ebiu_amc *amc, bu32 mmr_off,
 270                                void *valuep, bu16 *value16, bu32 *value32)
 271 {
 272   switch (mmr_off)
 273     {
 274     case mmr_offset(amgctl):
 275       if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, false))
 276         return 0;
 277       dv_store_2 (dest, *value16);
 278       break;
 279     case mmr_offset(bf53x.ambctl0):
 280     case mmr_offset(bf53x.ambctl1):
 281       dv_store_4 (dest, *value32);
 282       break;
 283     default:
 284       dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
 285       return 0;
 286     }
 287
 288   return nr_bytes;
 289 }
 290
 291 static unsigned
 292 bf54x_ebiu_amc_io_read_buffer (struct hw *me, void *dest, int space,
 293                                address_word addr, unsigned nr_bytes,
 294                                struct bfin_ebiu_amc *amc, bu32 mmr_off,
 295                                void *valuep, bu16 *value16, bu32 *value32)
 296 {
 297   switch (mmr_off)
 298     {
 299     case mmr_offset(amgctl):
 300       if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, false))
 301         return 0;
 302       dv_store_2 (dest, *value16);
 303       break;
 304     case mmr_offset(bf54x.ambctl0):
 305     case mmr_offset(bf54x.ambctl1):
 306     case mmr_offset(bf54x.mbsctl):
 307     case mmr_offset(bf54x.arbstat):
 308     case mmr_offset(bf54x.mode):
 309     case mmr_offset(bf54x.fctl):
 310       dv_store_4 (dest, *value32);
 311       break;
 312     default:
 313       dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
 314       return 0;
 315     }
 316
 317   return nr_bytes;
 318 }
 319
 320 static unsigned
 321 bfin_ebiu_amc_io_read_buffer (struct hw *me, void *dest, int space,
 322                               address_word addr, unsigned nr_bytes)
 323 {
 324   struct bfin_ebiu_amc *amc = hw_data (me);
 325   bu32 mmr_off;
 326   void *valuep;
 327
 328   /* Invalid access mode is higher priority than missing register.  */
 329   if (!dv_bfin_mmr_require_16_32 (me, addr, nr_bytes, false))
 330     return 0;
 331
 332   mmr_off = addr - amc->base;
 333   valuep = (void *)((unsigned long)amc + mmr_base() + mmr_off);
 334
 335   HW_TRACE_READ ();
 336
 337   return amc->io_read (me, dest, space, addr, nr_bytes, amc,
 338                        mmr_off, valuep, valuep, valuep);
 339 }
 340
 341 static void
 342 bfin_ebiu_amc_attach_address_callback (struct hw *me,
 343                                        int level,
 344                                        int space,
 345                                        address_word addr,
 346                                        address_word nr_bytes,
 347                                        struct hw *client)
 348 {
 349   struct bfin_ebiu_amc *amc = hw_data (me);
 350
 351   HW_TRACE ((me, "attach - level=%d, space=%d, addr=0x%lx, nr_bytes=%lu, client=%s",
 352              level, space, (unsigned long) addr, (unsigned long) nr_bytes, hw_path (client)));
 353
 354   if (addr + nr_bytes > ARRAY_SIZE (amc->slaves))
 355     hw_abort (me, "ebiu amc attaches are done in terms of banks");
 356
 357   while (nr_bytes--)
 358     amc->slaves[addr + nr_bytes] = client;
 359
 360   bfin_ebiu_amc_write_amgctl (me, amc, amc->amgctl);
 361 }
 362
 363 static void
 364 attach_bfin_ebiu_amc_regs (struct hw *me, struct bfin_ebiu_amc *amc,
 365                            unsigned reg_size)
 366 {
 367   address_word attach_address;
 368   int attach_space;
 369   unsigned attach_size;
 370   reg_property_spec reg;
 371
 372   if (hw_find_property (me, "reg") == NULL)
 373     hw_abort (me, "Missing \"reg\" property");
 374
 375   if (!hw_find_reg_array_property (me, "reg", 0, &reg))
 376     hw_abort (me, "\"reg\" property must contain three addr/size entries");
 377
 378   if (hw_find_property (me, "type") == NULL)
 379     hw_abort (me, "Missing \"type\" property");
 380
 381   hw_unit_address_to_attach_address (hw_parent (me),
 382                                      &reg.address,
 383                                      &attach_space, &attach_address, me);
 384   hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
 385
 386   if (attach_size != reg_size)
 387     hw_abort (me, "\"reg\" size must be %#x", reg_size);
 388
 389   hw_attach_address (hw_parent (me),
 390                      0, attach_space, attach_address, attach_size, me);
 391
 392   amc->base = attach_address;
 393 }
 394
 395 static void
 396 bfin_ebiu_amc_finish (struct hw *me)
 397 {
 398   struct bfin_ebiu_amc *amc;
 399   bu32 amgctl;
 400   unsigned reg_size;
 401
 402   amc = HW_ZALLOC (me, struct bfin_ebiu_amc);
 403
 404   set_hw_data (me, amc);
 405   set_hw_io_read_buffer (me, bfin_ebiu_amc_io_read_buffer);
 406   set_hw_io_write_buffer (me, bfin_ebiu_amc_io_write_buffer);
 407   set_hw_attach_address (me, bfin_ebiu_amc_attach_address_callback);
 408
 409   amc->type = hw_find_integer_property (me, "type");
 410
 411   switch (amc->type)
 412     {
 413     case 500 ... 509:
 414       amc->io_write = bf50x_ebiu_amc_io_write_buffer;
 415       amc->io_read = bf50x_ebiu_amc_io_read_buffer;
 416       mmr_names = bf50x_mmr_names;
 417       reg_size = sizeof (amc->bf50x) + 4;
 418
 419       /* Initialize the AMC.  */
 420       amc->bank_base     = BFIN_EBIU_AMC_BASE;
 421       amc->bank_size     = 1 * 1024 * 1024;
 422       amgctl             = 0x00F3;
 423       amc->bf50x.ambctl0 = 0x0000FFC2;
 424       amc->bf50x.ambctl1 = 0x0000FFC2;
 425       amc->bf50x.mode    = 0x0001;
 426       amc->bf50x.fctl    = 0x0002;
 427       break;
 428     case 540 ... 549:
 429       amc->io_write = bf54x_ebiu_amc_io_write_buffer;
 430       amc->io_read = bf54x_ebiu_amc_io_read_buffer;
 431       mmr_names = bf54x_mmr_names;
 432       reg_size = sizeof (amc->bf54x) + 4;
 433
 434       /* Initialize the AMC.  */
 435       amc->bank_base     = BFIN_EBIU_AMC_BASE;
 436       amc->bank_size     = 64 * 1024 * 1024;
 437       amgctl             = 0x0002;
 438       amc->bf54x.ambctl0 = 0xFFC2FFC2;
 439       amc->bf54x.ambctl1 = 0xFFC2FFC2;
 440       amc->bf54x.fctl    = 0x0006;
 441       break;
 442     case 510 ... 519:
 443     case 522 ... 527:
 444     case 531 ... 533:
 445     case 534:
 446     case 536:
 447     case 537:
 448     case 538 ... 539:
 449     case 561:
 450       amc->io_write = bf53x_ebiu_amc_io_write_buffer;
 451       amc->io_read = bf53x_ebiu_amc_io_read_buffer;
 452       mmr_names = bf53x_mmr_names;
 453       reg_size = sizeof (amc->bf53x) + 4;
 454
 455       /* Initialize the AMC.  */
 456       amc->bank_base     = BFIN_EBIU_AMC_BASE;
 457       if (amc->type == 561)
 458         amc->bank_size   = 64 * 1024 * 1024;
 459       else
 460         amc->bank_size   = 1 * 1024 * 1024;
 461       amgctl             = 0x00F2;
 462       amc->bf53x.ambctl0 = 0xFFC2FFC2;
 463       amc->bf53x.ambctl1 = 0xFFC2FFC2;
 464       break;
 465     case 590 ... 599: /* BF59x has no AMC.  */
 466     default:
 467       hw_abort (me, "no support for EBIU AMC on this Blackfin model yet");
 468     }
 469
 470   attach_bfin_ebiu_amc_regs (me, amc, reg_size);
 471
 472   bfin_ebiu_amc_write_amgctl (me, amc, amgctl);
 473 }
 474
 475 const struct hw_descriptor dv_bfin_ebiu_amc_descriptor[] =
 476 {
 477   {"bfin_ebiu_amc", bfin_ebiu_amc_finish,},
 478   {NULL, NULL},
 479 };