arch/ppc/boot/simple/embed_config.c

   1 /* Board specific functions for those embedded 8xx boards that do
   2  * not have boot monitor support for board information.
   3  *
   4  * This program is free software; you can redistribute  it and/or modify it
   5  * under  the terms of  the GNU General  Public License as published by the
   6  * Free Software Foundation;  either version 2 of the  License, or (at your
   7  * option) any later version.
   8  */
   9
  10 #include <linux/types.h>
  11 #include <linux/config.h>
  12 #include <linux/string.h>
  13 #include <asm/reg.h>
  14 #ifdef CONFIG_8xx
  15 #include <asm/mpc8xx.h>
  16 #endif
  17 #ifdef CONFIG_8260
  18 #include <asm/mpc8260.h>
  19 #include <asm/immap_cpm2.h>
  20 #endif
  21 #ifdef CONFIG_40x
  22 #include <asm/io.h>
  23 #endif
  24 extern unsigned long timebase_period_ns;
  25
  26 /* For those boards that don't provide one.
  27 */
  28 #if !defined(CONFIG_MBX)
  29 static  bd_t    bdinfo;
  30 #endif
  31
  32 /* IIC functions.
  33  * These are just the basic master read/write operations so we can
  34  * examine serial EEPROM.
  35  */
  36 extern void     iic_read(uint devaddr, u_char *buf, uint offset, uint count);
  37
  38 /* Supply a default Ethernet address for those eval boards that don't
  39  * ship with one.  This is an address from the MBX board I have, so
  40  * it is unlikely you will find it on your network.
  41  */
  42 static  ushort  def_enet_addr[] = { 0x0800, 0x3e26, 0x1559 };
  43
  44 #if defined(CONFIG_MBX)
  45
  46 /* The MBX hands us a pretty much ready to go board descriptor.  This
  47  * is where the idea started in the first place.
  48  */
  49 void
  50 embed_config(bd_t **bdp)
  51 {
  52         u_char  *mp;
  53         u_char  eebuf[128];
  54         int i = 8;
  55         bd_t    *bd;
  56
  57         bd = *bdp;
  58
  59         /* Read the first 128 bytes of the EEPROM.  There is more,
  60          * but this is all we need.
  61          */
  62         iic_read(0xa4, eebuf, 0, 128);
  63
  64         /* All we are looking for is the Ethernet MAC address.  The
  65          * first 8 bytes are 'MOTOROLA', so check for part of that.
  66          * Next, the VPD describes a MAC 'packet' as being of type 08
  67          * and size 06.  So we look for that and the MAC must follow.
  68          * If there are more than one, we still only care about the first.
  69          * If it's there, assume we have a valid MAC address.  If not,
  70          * grab our default one.
  71          */
  72         if ((*(uint *)eebuf) == 0x4d4f544f) {
  73                 while (i < 127 && !(eebuf[i] == 0x08 && eebuf[i + 1] == 0x06))
  74                          i += eebuf[i + 1] + 2;  /* skip this packet */
  75
  76                 if (i == 127)   /* Couldn't find. */
  77                         mp = (u_char *)def_enet_addr;
  78                 else
  79                         mp = &eebuf[i + 2];
  80         }
  81         else
  82                 mp = (u_char *)def_enet_addr;
  83
  84         for (i=0; i<6; i++)
  85                 bd->bi_enetaddr[i] = *mp++;
  86
  87         /* The boot rom passes these to us in MHz.  Linux now expects
  88          * them to be in Hz.
  89          */
  90         bd->bi_intfreq *= 1000000;
  91         bd->bi_busfreq *= 1000000;
  92
  93         /* Stuff a baud rate here as well.
  94         */
  95         bd->bi_baudrate = 9600;
  96 }
  97 #endif /* CONFIG_MBX */
  98
  99 #if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC) || \
 100         defined(CONFIG_RPX8260) || defined(CONFIG_EP405)
 101 /* Helper functions for Embedded Planet boards.
 102 */
 103 /* Because I didn't find anything that would do this.......
 104 */
 105 u_char
 106 aschex_to_byte(u_char *cp)
 107 {
 108         u_char  byte, c;
 109
 110         c = *cp++;
 111
 112         if ((c >= 'A') && (c <= 'F')) {
 113                 c -= 'A';
 114                 c += 10;
 115         } else if ((c >= 'a') && (c <= 'f')) {
 116                 c -= 'a';
 117                 c += 10;
 118         } else
 119                 c -= '0';
 120
 121         byte = c * 16;
 122
 123         c = *cp;
 124
 125         if ((c >= 'A') && (c <= 'F')) {
 126                 c -= 'A';
 127                 c += 10;
 128         } else if ((c >= 'a') && (c <= 'f')) {
 129                 c -= 'a';
 130                 c += 10;
 131         } else
 132                 c -= '0';
 133
 134         byte += c;
 135
 136         return(byte);
 137 }
 138
 139 static void
 140 rpx_eth(bd_t *bd, u_char *cp)
 141 {
 142         int     i;
 143
 144         for (i=0; i<6; i++) {
 145                 bd->bi_enetaddr[i] = aschex_to_byte(cp);
 146                 cp += 2;
 147         }
 148 }
 149
 150 #ifdef CONFIG_RPX8260
 151 static uint
 152 rpx_baseten(u_char *cp)
 153 {
 154         uint    retval;
 155
 156         retval = 0;
 157
 158         while (*cp != '\n') {
 159                 retval *= 10;
 160                 retval += (*cp) - '0';
 161                 cp++;
 162         }
 163         return(retval);
 164 }
 165 #endif
 166
 167 #if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC)
 168 static void
 169 rpx_brate(bd_t *bd, u_char *cp)
 170 {
 171         uint    rate;
 172
 173         rate = 0;
 174
 175         while (*cp != '\n') {
 176                 rate *= 10;
 177                 rate += (*cp) - '0';
 178                 cp++;
 179         }
 180
 181         bd->bi_baudrate = rate * 100;
 182 }
 183
 184 static void
 185 rpx_cpuspeed(bd_t *bd, u_char *cp)
 186 {
 187         uint    num, den;
 188
 189         num = den = 0;
 190
 191         while (*cp != '\n') {
 192                 num *= 10;
 193                 num += (*cp) - '0';
 194                 cp++;
 195                 if (*cp == '/') {
 196                         cp++;
 197                         den = (*cp) - '0';
 198                         break;
 199                 }
 200         }
 201
 202         /* I don't know why the RPX just can't state the actual
 203          * CPU speed.....
 204          */
 205         if (den) {
 206                 num /= den;
 207                 num *= den;
 208         }
 209         bd->bi_intfreq = bd->bi_busfreq = num * 1000000;
 210
 211         /* The 8xx can only run a maximum 50 MHz bus speed (until
 212          * Motorola changes this :-).  Greater than 50 MHz parts
 213          * run internal/2 for bus speed.
 214          */
 215         if (num > 50)
 216                 bd->bi_busfreq /= 2;
 217 }
 218 #endif
 219
 220 #if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC) || defined(CONFIG_EP405)
 221 static void
 222 rpx_memsize(bd_t *bd, u_char *cp)
 223 {
 224         uint    size;
 225
 226         size = 0;
 227
 228         while (*cp != '\n') {
 229                 size *= 10;
 230                 size += (*cp) - '0';
 231                 cp++;
 232         }
 233
 234         bd->bi_memsize = size * 1024 * 1024;
 235 }
 236 #endif /* LITE || CLASSIC || EP405 */
 237 #if defined(CONFIG_EP405)
 238 static void
 239 rpx_nvramsize(bd_t *bd, u_char *cp)
 240 {
 241         uint    size;
 242
 243         size = 0;
 244
 245         while (*cp != '\n') {
 246                 size *= 10;
 247                 size += (*cp) - '0';
 248                 cp++;
 249         }
 250
 251         bd->bi_nvramsize = size * 1024;
 252 }
 253 #endif /* CONFIG_EP405 */
 254
 255 #endif  /* Embedded Planet boards */
 256
 257 #if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC)
 258
 259 /* Read the EEPROM on the RPX-Lite board.
 260 */
 261 void
 262 embed_config(bd_t **bdp)
 263 {
 264         u_char  eebuf[256], *cp;
 265         bd_t    *bd;
 266
 267         /* Read the first 256 bytes of the EEPROM.  I think this
 268          * is really all there is, and I hope if it gets bigger the
 269          * info we want is still up front.
 270          */
 271         bd = &bdinfo;
 272         *bdp = bd;
 273
 274 #if 1
 275         iic_read(0xa8, eebuf, 0, 128);
 276         iic_read(0xa8, &eebuf[128], 128, 128);
 277
 278         /* We look for two things, the Ethernet address and the
 279          * serial baud rate.  The records are separated by
 280          * newlines.
 281          */
 282         cp = eebuf;
 283         for (;;) {
 284                 if (*cp == 'E') {
 285                         cp++;
 286                         if (*cp == 'A') {
 287                                 cp += 2;
 288                                 rpx_eth(bd, cp);
 289                         }
 290                 }
 291                 if (*cp == 'S') {
 292                         cp++;
 293                         if (*cp == 'B') {
 294                                 cp += 2;
 295                                 rpx_brate(bd, cp);
 296                         }
 297                 }
 298                 if (*cp == 'D') {
 299                         cp++;
 300                         if (*cp == '1') {
 301                                 cp += 2;
 302                                 rpx_memsize(bd, cp);
 303                         }
 304                 }
 305                 if (*cp == 'H') {
 306                         cp++;
 307                         if (*cp == 'Z') {
 308                                 cp += 2;
 309                                 rpx_cpuspeed(bd, cp);
 310                         }
 311                 }
 312
 313                 /* Scan to the end of the record.
 314                 */
 315                 while ((*cp != '\n') && (*cp != 0xff))
 316                         cp++;
 317
 318                 /* If the next character is a 0 or ff, we are done.
 319                 */
 320                 cp++;
 321                 if ((*cp == 0) || (*cp == 0xff))
 322                         break;
 323         }
 324         bd->bi_memstart = 0;
 325 #else
 326         /* For boards without initialized EEPROM.
 327         */
 328         bd->bi_memstart = 0;
 329         bd->bi_memsize = (8 * 1024 * 1024);
 330         bd->bi_intfreq = 48000000;
 331         bd->bi_busfreq = 48000000;
 332         bd->bi_baudrate = 9600;
 333 #endif
 334 }
 335 #endif /* RPXLITE || RPXCLASSIC */
 336
 337 #ifdef CONFIG_BSEIP
 338 /* Build a board information structure for the BSE ip-Engine.
 339  * There is more to come since we will add some environment
 340  * variables and a function to read them.
 341  */
 342 void
 343 embed_config(bd_t **bdp)
 344 {
 345         u_char  *cp;
 346         int     i;
 347         bd_t    *bd;
 348
 349         bd = &bdinfo;
 350         *bdp = bd;
 351
 352         /* Baud rate and processor speed will eventually come
 353          * from the environment variables.
 354          */
 355         bd->bi_baudrate = 9600;
 356
 357         /* Get the Ethernet station address from the Flash ROM.
 358         */
 359         cp = (u_char *)0xfe003ffa;
 360         for (i=0; i<6; i++) {
 361                 bd->bi_enetaddr[i] = *cp++;
 362         }
 363
 364         /* The rest of this should come from the environment as well.
 365         */
 366         bd->bi_memstart = 0;
 367         bd->bi_memsize = (16 * 1024 * 1024);
 368         bd->bi_intfreq = 48000000;
 369         bd->bi_busfreq = 48000000;
 370 }
 371 #endif /* BSEIP */
 372
 373 #ifdef CONFIG_FADS
 374 /* Build a board information structure for the FADS.
 375  */
 376 void
 377 embed_config(bd_t **bdp)
 378 {
 379         u_char  *cp;
 380         int     i;
 381         bd_t    *bd;
 382
 383         bd = &bdinfo;
 384         *bdp = bd;
 385
 386         /* Just fill in some known values.
 387          */
 388         bd->bi_baudrate = 9600;
 389
 390         /* Use default enet.
 391         */
 392         cp = (u_char *)def_enet_addr;
 393         for (i=0; i<6; i++) {
 394                 bd->bi_enetaddr[i] = *cp++;
 395         }
 396
 397         bd->bi_memstart = 0;
 398         bd->bi_memsize = (8 * 1024 * 1024);
 399         bd->bi_intfreq = 40000000;
 400         bd->bi_busfreq = 40000000;
 401 }
 402 #endif /* FADS */
 403
 404 #ifdef CONFIG_8260
 405 /* Compute 8260 clock values if the rom doesn't provide them.
 406  */
 407 static unsigned char bus2core_8260[] = {
 408 /*      0   1   2   3   4   5   6   7   8   9   a   b   c   d   e   f */
 409         3,  2,  2,  2,  4,  4,  5,  9,  6, 11,  8, 10,  3, 12,  7,  2,
 410         6,  5, 13,  2, 14,  4, 15,  2,  3, 11,  8, 10, 16, 12,  7,  2,
 411 };
 412
 413 static void
 414 clk_8260(bd_t *bd)
 415 {
 416         uint    scmr, vco_out, clkin;
 417         uint    plldf, pllmf, corecnf;
 418         volatile cpm2_map_t     *ip;
 419
 420         ip = (cpm2_map_t *)CPM_MAP_ADDR;
 421         scmr = ip->im_clkrst.car_scmr;
 422
 423         /* The clkin is always bus frequency.
 424         */
 425         clkin = bd->bi_busfreq;
 426
 427         /* Collect the bits from the scmr.
 428         */
 429         plldf = (scmr >> 12) & 1;
 430         pllmf = scmr & 0xfff;
 431         corecnf = (scmr >> 24) &0x1f;
 432
 433         /* This is arithmetic from the 8260 manual.
 434         */
 435         vco_out = clkin / (plldf + 1);
 436         vco_out *= 2 * (pllmf + 1);
 437         bd->bi_vco = vco_out;           /* Save for later */
 438
 439         bd->bi_cpmfreq = vco_out / 2;   /* CPM Freq, in MHz */
 440         bd->bi_intfreq = bd->bi_busfreq * bus2core_8260[corecnf] / 2;
 441
 442         /* Set Baud rate divisor.  The power up default is divide by 16,
 443          * but we set it again here in case it was changed.
 444          */
 445         ip->im_clkrst.car_sccr = 1;     /* DIV 16 BRG */
 446         bd->bi_brgfreq = vco_out / 16;
 447 }
 448
 449 static unsigned char bus2core_8280[] = {
 450 /*      0   1   2   3   4   5   6   7   8   9   a   b   c   d   e   f */
 451         3,  2,  2,  2,  4,  4,  5,  9,  6, 11,  8, 10,  3, 12,  7,  2,
 452         6,  5, 13,  2, 14,  2, 15,  2,  3,  2,  2,  2, 16,  2,  2,  2,
 453 };
 454
 455 static void
 456 clk_8280(bd_t *bd)
 457 {
 458         uint    scmr, main_clk, clkin;
 459         uint    pllmf, corecnf;
 460         volatile cpm2_map_t     *ip;
 461
 462         ip = (cpm2_map_t *)CPM_MAP_ADDR;
 463         scmr = ip->im_clkrst.car_scmr;
 464
 465         /* The clkin is always bus frequency.
 466         */
 467         clkin = bd->bi_busfreq;
 468
 469         /* Collect the bits from the scmr.
 470         */
 471         pllmf = scmr & 0xf;
 472         corecnf = (scmr >> 24) & 0x1f;
 473
 474         /* This is arithmetic from the 8280 manual.
 475         */
 476         main_clk = clkin * (pllmf + 1);
 477
 478         bd->bi_cpmfreq = main_clk / 2;  /* CPM Freq, in MHz */
 479         bd->bi_intfreq = bd->bi_busfreq * bus2core_8280[corecnf] / 2;
 480
 481         /* Set Baud rate divisor.  The power up default is divide by 16,
 482          * but we set it again here in case it was changed.
 483          */
 484         ip->im_clkrst.car_sccr = (ip->im_clkrst.car_sccr & 0x3) | 0x1;
 485         bd->bi_brgfreq = main_clk / 16;
 486 }
 487 #endif
 488
 489 #ifdef CONFIG_SBC82xx
 490 void
 491 embed_config(bd_t **bdp)
 492 {
 493         u_char  *cp;
 494         int     i;
 495         bd_t    *bd;
 496         unsigned long pvr;
 497
 498         bd = *bdp;
 499
 500         bd = &bdinfo;
 501         *bdp = bd;
 502         bd->bi_baudrate = 9600;
 503         bd->bi_memsize = 256 * 1024 * 1024;     /* just a guess */
 504
 505         cp = (void*)SBC82xx_MACADDR_NVRAM_SCC1;
 506         memcpy(bd->bi_enetaddr, cp, 6);
 507
 508         /* can busfreq be calculated? */
 509         pvr = mfspr(PVR);
 510         if ((pvr & 0xffff0000) == 0x80820000) {
 511                 bd->bi_busfreq = 100000000;
 512                 clk_8280(bd);
 513         } else {
 514                 bd->bi_busfreq = 66000000;
 515                 clk_8260(bd);
 516         }
 517
 518 }
 519 #endif /* SBC82xx */
 520
 521 #if defined(CONFIG_EST8260) || defined(CONFIG_TQM8260)
 522 void
 523 embed_config(bd_t **bdp)
 524 {
 525         u_char  *cp;
 526         int     i;
 527         bd_t    *bd;
 528
 529         bd = *bdp;
 530 #if 0
 531         /* This is actually provided by my boot rom.  I have it
 532          * here for those people that may load the kernel with
 533          * a JTAG/COP tool and not the rom monitor.
 534          */
 535         bd->bi_baudrate = 115200;
 536         bd->bi_intfreq = 200000000;
 537         bd->bi_busfreq = 66666666;
 538         bd->bi_cpmfreq = 66666666;
 539         bd->bi_brgfreq = 33333333;
 540         bd->bi_memsize = 16 * 1024 * 1024;
 541 #else
 542         /* The boot rom passes these to us in MHz.  Linux now expects
 543          * them to be in Hz.
 544          */
 545         bd->bi_intfreq *= 1000000;
 546         bd->bi_busfreq *= 1000000;
 547         bd->bi_cpmfreq *= 1000000;
 548         bd->bi_brgfreq *= 1000000;
 549 #endif
 550
 551         cp = (u_char *)def_enet_addr;
 552         for (i=0; i<6; i++) {
 553                 bd->bi_enetaddr[i] = *cp++;
 554         }
 555 }
 556 #endif /* EST8260 */
 557
 558 #ifdef CONFIG_SBS8260
 559 void
 560 embed_config(bd_t **bdp)
 561 {
 562         u_char  *cp;
 563         int     i;
 564         bd_t    *bd;
 565
 566         /* This should provided by the boot rom.
 567          */
 568         bd = &bdinfo;
 569         *bdp = bd;
 570         bd->bi_baudrate = 9600;
 571         bd->bi_memsize = 64 * 1024 * 1024;
 572
 573         /* Set all of the clocks.  We have to know the speed of the
 574          * external clock.  The development board had 66 MHz.
 575          */
 576         bd->bi_busfreq = 66666666;
 577         clk_8260(bd);
 578
 579         /* I don't know how to compute this yet.
 580         */
 581         bd->bi_intfreq = 133000000;
 582
 583
 584         cp = (u_char *)def_enet_addr;
 585         for (i=0; i<6; i++) {
 586                 bd->bi_enetaddr[i] = *cp++;
 587         }
 588 }
 589 #endif /* SBS8260 */
 590
 591 #ifdef CONFIG_RPX8260
 592 void
 593 embed_config(bd_t **bdp)
 594 {
 595         u_char  *cp, *keyvals;
 596         int     i;
 597         bd_t    *bd;
 598
 599         keyvals = (u_char *)*bdp;
 600
 601         bd = &bdinfo;
 602         *bdp = bd;
 603
 604         /* This is almost identical to the RPX-Lite/Classic functions
 605          * on the 8xx boards.  It would be nice to have a key lookup
 606          * function in a string, but the format of all of the fields
 607          * is slightly different.
 608          */
 609         cp = keyvals;
 610         for (;;) {
 611                 if (*cp == 'E') {
 612                         cp++;
 613                         if (*cp == 'A') {
 614                                 cp += 2;
 615                                 rpx_eth(bd, cp);
 616                         }
 617                 }
 618                 if (*cp == 'S') {
 619                         cp++;
 620                         if (*cp == 'B') {
 621                                 cp += 2;
 622                                 bd->bi_baudrate = rpx_baseten(cp);
 623                         }
 624                 }
 625                 if (*cp == 'D') {
 626                         cp++;
 627                         if (*cp == '1') {
 628                                 cp += 2;
 629                                 bd->bi_memsize = rpx_baseten(cp) * 1024 * 1024;
 630                         }
 631                 }
 632                 if (*cp == 'X') {
 633                         cp++;
 634                         if (*cp == 'T') {
 635                                 cp += 2;
 636                                 bd->bi_busfreq = rpx_baseten(cp);
 637                         }
 638                 }
 639                 if (*cp == 'N') {
 640                         cp++;
 641                         if (*cp == 'V') {
 642                                 cp += 2;
 643                                 bd->bi_nvsize = rpx_baseten(cp) * 1024 * 1024;
 644                         }
 645                 }
 646
 647                 /* Scan to the end of the record.
 648                 */
 649                 while ((*cp != '\n') && (*cp != 0xff))
 650                         cp++;
 651
 652                 /* If the next character is a 0 or ff, we are done.
 653                 */
 654                 cp++;
 655                 if ((*cp == 0) || (*cp == 0xff))
 656                         break;
 657         }
 658         bd->bi_memstart = 0;
 659
 660         /* The memory size includes both the 60x and local bus DRAM.
 661          * I don't want to use the local bus DRAM for real memory,
 662          * so subtract it out.  It would be nice if they were separate
 663          * keys.
 664          */
 665         bd->bi_memsize -= 32 * 1024 * 1024;
 666
 667         /* Set all of the clocks.  We have to know the speed of the
 668          * external clock.
 669          */
 670         clk_8260(bd);
 671
 672         /* I don't know how to compute this yet.
 673         */
 674         bd->bi_intfreq = 200000000;
 675 }
 676 #endif /* RPX6 for testing */
 677
 678 #ifdef CONFIG_ADS8260
 679 void
 680 embed_config(bd_t **bdp)
 681 {
 682         u_char  *cp;
 683         int     i;
 684         bd_t    *bd;
 685
 686         /* This should provided by the boot rom.
 687          */
 688         bd = &bdinfo;
 689         *bdp = bd;
 690         bd->bi_baudrate = 9600;
 691         bd->bi_memsize = 16 * 1024 * 1024;
 692
 693         /* Set all of the clocks.  We have to know the speed of the
 694          * external clock.  The development board had 66 MHz.
 695          */
 696         bd->bi_busfreq = 66666666;
 697         clk_8260(bd);
 698
 699         /* I don't know how to compute this yet.
 700         */
 701         bd->bi_intfreq = 200000000;
 702
 703
 704         cp = (u_char *)def_enet_addr;
 705         for (i=0; i<6; i++) {
 706                 bd->bi_enetaddr[i] = *cp++;
 707         }
 708 }
 709 #endif /* ADS8260 */
 710
 711 #ifdef CONFIG_WILLOW
 712 void
 713 embed_config(bd_t **bdp)
 714 {
 715         u_char  *cp;
 716         int     i;
 717         bd_t    *bd;
 718
 719         /* Willow has Open Firmware....I should learn how to get this
 720          * information from it.
 721          */
 722         bd = &bdinfo;
 723         *bdp = bd;
 724         bd->bi_baudrate = 9600;
 725         bd->bi_memsize = 32 * 1024 * 1024;
 726
 727         /* Set all of the clocks.  We have to know the speed of the
 728          * external clock.  The development board had 66 MHz.
 729          */
 730         bd->bi_busfreq = 66666666;
 731         clk_8260(bd);
 732
 733         /* I don't know how to compute this yet.
 734         */
 735         bd->bi_intfreq = 200000000;
 736
 737
 738         cp = (u_char *)def_enet_addr;
 739         for (i=0; i<6; i++) {
 740                 bd->bi_enetaddr[i] = *cp++;
 741         }
 742 }
 743 #endif /* WILLOW */
 744
 745 #ifdef CONFIG_XILINX_ML300
 746 void
 747 embed_config(bd_t ** bdp)
 748 {
 749         static const unsigned long line_size = 32;
 750         static const unsigned long congruence_classes = 256;
 751         unsigned long addr;
 752         u_char *cp;
 753         int i;
 754         bd_t *bd;
 755
 756         /*
 757          * At one point, we were getting machine checks.  Linux was not
 758          * invalidating the data cache before it was enabled.  The
 759          * following code was added to do that.  Soon after we had done
 760          * that, we found the real reasons for the machine checks.  I've
 761          * run the kernel a few times with the following code
 762          * temporarily removed without any apparent problems.  However,
 763          * I objdump'ed the kernel and boot code and found out that
 764          * there were no other dccci's anywhere, so I put the code back
 765          * in and have been reluctant to remove it.  It seems safer to
 766          * just leave it here.
 767          */
 768         for (addr = 0;
 769              addr < (congruence_classes * line_size); addr += line_size) {
 770               __asm__("dccci 0,%0": :"b"(addr));
 771         }
 772
 773         bd = &bdinfo;
 774         *bdp = bd;
 775         bd->bi_memsize = XPAR_DDR_0_SIZE;
 776         bd->bi_intfreq = XPAR_CORE_CLOCK_FREQ_HZ;
 777         bd->bi_busfreq = XPAR_PLB_CLOCK_FREQ_HZ;
 778 }
 779 #endif /* CONFIG_XILINX_ML300 */
 780
 781 #ifdef CONFIG_IBM_OPENBIOS
 782 /* This could possibly work for all treeboot roms.
 783 */
 784 #if defined(CONFIG_ASH) || defined(CONFIG_BEECH) || defined(CONFIG_BUBINGA)
 785 #define BOARD_INFO_VECTOR       0xFFF80B50 /* openbios 1.19 moved this vector down  - armin */
 786 #else
 787 #define BOARD_INFO_VECTOR       0xFFFE0B50
 788 #endif
 789
 790 #ifdef CONFIG_BEECH
 791 static void
 792 get_board_info(bd_t **bdp)
 793 {
 794         typedef void (*PFV)(bd_t *bd);
 795         ((PFV)(*(unsigned long *)BOARD_INFO_VECTOR))(*bdp);
 796         return;
 797 }
 798
 799 void
 800 embed_config(bd_t **bdp)
 801 {
 802         *bdp = &bdinfo;
 803         get_board_info(bdp);
 804 }
 805 #else /* !CONFIG_BEECH */
 806 void
 807 embed_config(bd_t **bdp)
 808 {
 809         u_char  *cp;
 810         int     i;
 811         bd_t    *bd, *treeboot_bd;
 812         bd_t *(*get_board_info)(void) =
 813             (bd_t *(*)(void))(*(unsigned long *)BOARD_INFO_VECTOR);
 814 #if !defined(CONFIG_STB03xxx)
 815
 816         /* shut down the Ethernet controller that the boot rom
 817          * sometimes leaves running.
 818          */
 819         mtdcr(DCRN_MALCR(DCRN_MAL_BASE), MALCR_MMSR);     /* 1st reset MAL */
 820         while (mfdcr(DCRN_MALCR(DCRN_MAL_BASE)) & MALCR_MMSR) {}; /* wait for the reset */
 821         out_be32((volatile u32*)EMAC0_BASE,0x20000000);        /* then reset EMAC */
 822 #endif
 823
 824         bd = &bdinfo;
 825         *bdp = bd;
 826         if ((treeboot_bd = get_board_info()) != NULL) {
 827                 memcpy(bd, treeboot_bd, sizeof(bd_t));
 828         }
 829         else {
 830                 /* Hmmm...better try to stuff some defaults.
 831                 */
 832                 bd->bi_memsize = 16 * 1024 * 1024;
 833                 cp = (u_char *)def_enet_addr;
 834                 for (i=0; i<6; i++) {
 835                         /* I should probably put different ones here,
 836                          * hopefully only one is used.
 837                          */
 838                         bd->BD_EMAC_ADDR(0,i) = *cp;
 839
 840 #ifdef CONFIG_PCI
 841                         bd->bi_pci_enetaddr[i] = *cp++;
 842 #endif
 843                 }
 844                 bd->bi_tbfreq = 200 * 1000 * 1000;
 845                 bd->bi_intfreq = 200000000;
 846                 bd->bi_busfreq = 100000000;
 847 #ifdef CONFIG_PCI
 848                 bd->bi_pci_busfreq = 66666666;
 849 #endif
 850         }
 851         /* Yeah, this look weird, but on Redwood 4 they are
 852          * different object in the structure.  Sincr Redwwood 5
 853          * and Redwood 6 use OpenBIOS, it requires a special value.
 854          */
 855 #if defined(CONFIG_REDWOOD_5) || defined (CONFIG_REDWOOD_6)
 856         bd->bi_tbfreq = 27 * 1000 * 1000;
 857 #endif
 858         timebase_period_ns = 1000000000 / bd->bi_tbfreq;
 859 }
 860 #endif /* CONFIG_BEECH */
 861 #endif /* CONFIG_IBM_OPENBIOS */
 862
 863 #ifdef CONFIG_EP405
 864 #include <linux/serial_reg.h>
 865
 866 void
 867 embed_config(bd_t **bdp)
 868 {
 869         u32 chcr0;
 870         u_char *cp;
 871         bd_t    *bd;
 872
 873         /* Different versions of the PlanetCore firmware vary in how
 874            they set up the serial port - in particular whether they
 875            use the internal or external serial clock for UART0.  Make
 876            sure the UART is in a known state. */
 877         /* FIXME: We should use the board's 11.0592MHz external serial
 878            clock - it will be more accurate for serial rates.  For
 879            now, however the baud rates in ep405.h are for the internal
 880            clock. */
 881         chcr0 = mfdcr(DCRN_CHCR0);
 882         if ( (chcr0 & 0x1fff) != 0x103e ) {
 883                 mtdcr(DCRN_CHCR0, (chcr0 & 0xffffe000) | 0x103e);
 884                 /* The following tricks serial_init() into resetting the baud rate */
 885                 writeb(0, UART0_IO_BASE + UART_LCR);
 886         }
 887
 888         /* We haven't seen actual problems with the EP405 leaving the
 889          * EMAC running (as we have on Walnut).  But the registers
 890          * suggest it may not be left completely quiescent.  Reset it
 891          * just to be sure. */
 892         mtdcr(DCRN_MALCR(DCRN_MAL_BASE), MALCR_MMSR);     /* 1st reset MAL */
 893         while (mfdcr(DCRN_MALCR(DCRN_MAL_BASE)) & MALCR_MMSR) {}; /* wait for the reset */
 894         out_be32((unsigned *)EMAC0_BASE,0x20000000);        /* then reset EMAC */
 895
 896         bd = &bdinfo;
 897         *bdp = bd;
 898 #if 1
 899                 cp = (u_char *)0xF0000EE0;
 900                 for (;;) {
 901                         if (*cp == 'E') {
 902                                 cp++;
 903                                 if (*cp == 'A') {
 904                                   cp += 2;
 905                                   rpx_eth(bd, cp);
 906                                 }
 907                          }
 908
 909                         if (*cp == 'D') {
 910                                         cp++;
 911                                         if (*cp == '1') {
 912                                                 cp += 2;
 913                                                 rpx_memsize(bd, cp);
 914                                         }
 915                         }
 916
 917                         if (*cp == 'N') {
 918                                 cp++;
 919                                 if (*cp == 'V') {
 920                                         cp += 2;
 921                                         rpx_nvramsize(bd, cp);
 922                                 }
 923                         }
 924                         while ((*cp != '\n') && (*cp != 0xff))
 925                               cp++;
 926
 927                         cp++;
 928                         if ((*cp == 0) || (*cp == 0xff))
 929                            break;
 930                }
 931         bd->bi_intfreq   = 200000000;
 932         bd->bi_busfreq   = 100000000;
 933         bd->bi_pci_busfreq= 33000000 ;
 934 #else
 935
 936         bd->bi_memsize   = 64000000;
 937         bd->bi_intfreq   = 200000000;
 938         bd->bi_busfreq   = 100000000;
 939         bd->bi_pci_busfreq= 33000000 ;
 940 #endif
 941 }
 942 #endif
 943
 944 #ifdef CONFIG_RAINIER
 945 /* Rainier uses vxworks bootrom */
 946 void
 947 embed_config(bd_t **bdp)
 948 {
 949         u_char  *cp;
 950         int     i;
 951         bd_t    *bd;
 952
 953         bd = &bdinfo;
 954         *bdp = bd;
 955
 956         for(i=0;i<8192;i+=32) {
 957                 __asm__("dccci 0,%0" :: "r" (i));
 958         }
 959         __asm__("iccci 0,0");
 960         __asm__("sync;isync");
 961
 962         /* init ram for parity */
 963         memset(0, 0,0x400000);  /* Lo memory */
 964
 965
 966         bd->bi_memsize   = (32 * 1024 * 1024) ;
 967         bd->bi_intfreq = 133000000; //the internal clock is 133 MHz
 968         bd->bi_busfreq   = 100000000;
 969         bd->bi_pci_busfreq= 33000000;
 970
 971         cp = (u_char *)def_enet_addr;
 972         for (i=0; i<6; i++) {
 973                 bd->bi_enetaddr[i] = *cp++;
 974         }
 975
 976 }
 977 #endif
 978