arch/ppc/platforms/prep_setup.c

   1 /*
   2  *  arch/ppc/platforms/setup.c
   3  *
   4  *  Copyright (C) 1995  Linus Torvalds
   5  *  Adapted from 'alpha' version by Gary Thomas
   6  *  Modified by Cort Dougan (cort@cs.nmt.edu)
   7  *
   8  * Support for PReP (Motorola MTX/MVME)
   9  * by Troy Benjegerdes (hozer@drgw.net)
  10  */
  11
  12 /*
  13  * bootup setup stuff..
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/delay.h>
  18 #include <linux/module.h>
  19 #include <linux/errno.h>
  20 #include <linux/sched.h>
  21 #include <linux/kernel.h>
  22 #include <linux/mm.h>
  23 #include <linux/stddef.h>
  24 #include <linux/unistd.h>
  25 #include <linux/ptrace.h>
  26 #include <linux/slab.h>
  27 #include <linux/user.h>
  28 #include <linux/a.out.h>
  29 #include <linux/tty.h>
  30 #include <linux/major.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/reboot.h>
  33 #include <linux/init.h>
  34 #include <linux/initrd.h>
  35 #include <linux/ioport.h>
  36 #include <linux/console.h>
  37 #include <linux/timex.h>
  38 #include <linux/pci.h>
  39 #include <linux/ide.h>
  40 #include <linux/seq_file.h>
  41 #include <linux/root_dev.h>
  42
  43 #include <asm/sections.h>
  44 #include <asm/mmu.h>
  45 #include <asm/processor.h>
  46 #include <asm/residual.h>
  47 #include <asm/io.h>
  48 #include <asm/pgtable.h>
  49 #include <asm/cache.h>
  50 #include <asm/dma.h>
  51 #include <asm/machdep.h>
  52 #include <asm/mc146818rtc.h>
  53 #include <asm/mk48t59.h>
  54 #include <asm/prep_nvram.h>
  55 #include <asm/raven.h>
  56 #include <asm/vga.h>
  57 #include <asm/time.h>
  58 #include <asm/mpc10x.h>
  59 #include <asm/i8259.h>
  60 #include <asm/open_pic.h>
  61 #include <asm/pci-bridge.h>
  62 #include <asm/todc.h>
  63
  64 TODC_ALLOC();
  65
  66 unsigned char ucSystemType;
  67 unsigned char ucBoardRev;
  68 unsigned char ucBoardRevMaj, ucBoardRevMin;
  69
  70 extern unsigned char prep_nvram_read_val(int addr);
  71 extern void prep_nvram_write_val(int addr,
  72                                  unsigned char val);
  73 extern unsigned char rs_nvram_read_val(int addr);
  74 extern void rs_nvram_write_val(int addr,
  75                                  unsigned char val);
  76 extern void ibm_prep_init(void);
  77
  78 extern void prep_find_bridges(void);
  79
  80 int _prep_type;
  81
  82 extern void prep_residual_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
  83 extern void prep_sandalfoot_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
  84 extern void prep_thinkpad_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
  85 extern void prep_carolina_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
  86 extern void prep_tiger1_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
  87
  88
  89 #define cached_21       (((char *)(ppc_cached_irq_mask))[3])
  90 #define cached_A1       (((char *)(ppc_cached_irq_mask))[2])
  91
  92 /* for the mac fs */
  93 dev_t boot_dev;
  94
  95 #ifdef CONFIG_SOUND_CS4232
  96 long ppc_cs4232_dma, ppc_cs4232_dma2;
  97 #endif
  98
  99 extern PTE *Hash, *Hash_end;
 100 extern unsigned long Hash_size, Hash_mask;
 101 extern int probingmem;
 102 extern unsigned long loops_per_jiffy;
 103
 104 #ifdef CONFIG_SOUND_CS4232
 105 EXPORT_SYMBOL(ppc_cs4232_dma);
 106 EXPORT_SYMBOL(ppc_cs4232_dma2);
 107 #endif
 108
 109 /* useful ISA ports */
 110 #define PREP_SYSCTL     0x81c
 111 /* present in the IBM reference design; possibly identical in Mot boxes: */
 112 #define PREP_IBM_SIMM_ID        0x803   /* SIMM size: 32 or 8 MiB */
 113 #define PREP_IBM_SIMM_PRESENCE  0x804
 114 #define PREP_IBM_EQUIPMENT      0x80c
 115 #define PREP_IBM_L2INFO 0x80d
 116 #define PREP_IBM_PM1    0x82a   /* power management register 1 */
 117 #define PREP_IBM_PLANAR 0x852   /* planar ID - identifies the motherboard */
 118 #define PREP_IBM_DISP   0x8c0   /* 4-digit LED display */
 119
 120 /* Equipment Present Register masks: */
 121 #define PREP_IBM_EQUIPMENT_RESERVED     0x80
 122 #define PREP_IBM_EQUIPMENT_SCSIFUSE     0x40
 123 #define PREP_IBM_EQUIPMENT_L2_COPYBACK  0x08
 124 #define PREP_IBM_EQUIPMENT_L2_256       0x04
 125 #define PREP_IBM_EQUIPMENT_CPU  0x02
 126 #define PREP_IBM_EQUIPMENT_L2   0x01
 127
 128 /* planar ID values: */
 129 /* Sandalfoot/Sandalbow (6015/7020) */
 130 #define PREP_IBM_SANDALFOOT     0xfc
 131 /* Woodfield, Thinkpad 850/860 (6042/7249) */
 132 #define PREP_IBM_THINKPAD       0xff /* planar ID unimplemented */
 133 /* PowerSeries 830/850 (6050/6070) */
 134 #define PREP_IBM_CAROLINA_IDE_0 0xf0
 135 #define PREP_IBM_CAROLINA_IDE_1 0xf1
 136 #define PREP_IBM_CAROLINA_IDE_2 0xf2
 137 #define PREP_IBM_CAROLINA_IDE_3 0xf3
 138 /* 7248-43P */
 139 #define PREP_IBM_CAROLINA_SCSI_0        0xf4
 140 #define PREP_IBM_CAROLINA_SCSI_1        0xf5
 141 #define PREP_IBM_CAROLINA_SCSI_2        0xf6
 142 #define PREP_IBM_CAROLINA_SCSI_3        0xf7 /* missing from Carolina Tech Spec */
 143 /* Tiger1 (7043-140) */
 144 #define PREP_IBM_TIGER1_133             0xd1
 145 #define PREP_IBM_TIGER1_166             0xd2
 146 #define PREP_IBM_TIGER1_180             0xd3
 147 #define PREP_IBM_TIGER1_xxx             0xd4 /* unknown, but probably exists */
 148 #define PREP_IBM_TIGER1_333             0xd5 /* missing from Tiger Tech Spec */
 149
 150 /* setup_ibm_pci:
 151  *      set Motherboard_map_name, Motherboard_map, Motherboard_routes.
 152  *      return 8259 edge/level masks.
 153  */
 154 void (*setup_ibm_pci)(char *irq_lo, char *irq_hi);
 155
 156 extern char *Motherboard_map_name; /* for use in *_cpuinfo */
 157
 158 /*
 159  * As found in the PReP reference implementation.
 160  * Used by Thinkpad, Sandalfoot (6015/7020), and all Motorola PReP.
 161  */
 162 static void __init
 163 prep_gen_enable_l2(void)
 164 {
 165         outb(inb(PREP_SYSCTL) | 0x3, PREP_SYSCTL);
 166 }
 167
 168 /* Used by Carolina and Tiger1 */
 169 static void __init
 170 prep_carolina_enable_l2(void)
 171 {
 172         outb(inb(PREP_SYSCTL) | 0xc0, PREP_SYSCTL);
 173 }
 174
 175 /* cpuinfo code common to all IBM PReP */
 176 static void __prep
 177 prep_ibm_cpuinfo(struct seq_file *m)
 178 {
 179         unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
 180
 181         seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
 182
 183         seq_printf(m, "upgrade cpu\t: ");
 184         if (equip_reg & PREP_IBM_EQUIPMENT_CPU) {
 185                 seq_printf(m, "not ");
 186         }
 187         seq_printf(m, "present\n");
 188
 189         /* print info about the SCSI fuse */
 190         seq_printf(m, "scsi fuse\t: ");
 191         if (equip_reg & PREP_IBM_EQUIPMENT_SCSIFUSE)
 192                 seq_printf(m, "ok");
 193         else
 194                 seq_printf(m, "bad");
 195         seq_printf(m, "\n");
 196
 197         /* print info about SIMMs */
 198         if (have_residual_data) {
 199                 int i;
 200                 seq_printf(m, "simms\t\t: ");
 201                 for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
 202                         if (res->Memories[i].SIMMSize != 0)
 203                                 seq_printf(m, "%d:%ldMiB ", i,
 204                                         (res->Memories[i].SIMMSize > 1024) ?
 205                                         res->Memories[i].SIMMSize>>20 :
 206                                         res->Memories[i].SIMMSize);
 207                 }
 208                 seq_printf(m, "\n");
 209         }
 210 }
 211
 212 static int __prep
 213 prep_gen_cpuinfo(struct seq_file *m)
 214 {
 215         prep_ibm_cpuinfo(m);
 216         return 0;
 217 }
 218
 219 static int __prep
 220 prep_sandalfoot_cpuinfo(struct seq_file *m)
 221 {
 222         unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
 223
 224         prep_ibm_cpuinfo(m);
 225
 226         /* report amount and type of L2 cache present */
 227         seq_printf(m, "L2 cache\t: ");
 228         if (equip_reg & PREP_IBM_EQUIPMENT_L2) {
 229                 seq_printf(m, "not present");
 230         } else {
 231                 if (equip_reg & PREP_IBM_EQUIPMENT_L2_256)
 232                         seq_printf(m, "256KiB");
 233                 else
 234                         seq_printf(m, "unknown size");
 235
 236                 if (equip_reg & PREP_IBM_EQUIPMENT_L2_COPYBACK)
 237                         seq_printf(m, ", copy-back");
 238                 else
 239                         seq_printf(m, ", write-through");
 240         }
 241         seq_printf(m, "\n");
 242
 243         return 0;
 244 }
 245
 246 static int __prep
 247 prep_thinkpad_cpuinfo(struct seq_file *m)
 248 {
 249         unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
 250         char *cpubus_speed, *pci_speed;
 251
 252         prep_ibm_cpuinfo(m);
 253
 254         /* report amount and type of L2 cache present */
 255         seq_printf(m, "l2 cache\t: ");
 256         if ((equip_reg & 0x1) == 0) {
 257                 switch ((equip_reg & 0xc) >> 2) {
 258                         case 0x0:
 259                                 seq_printf(m, "128KiB look-aside 2-way write-through\n");
 260                                 break;
 261                         case 0x1:
 262                                 seq_printf(m, "512KiB look-aside direct-mapped write-back\n");
 263                                 break;
 264                         case 0x2:
 265                                 seq_printf(m, "256KiB look-aside 2-way write-through\n");
 266                                 break;
 267                         case 0x3:
 268                                 seq_printf(m, "256KiB look-aside direct-mapped write-back\n");
 269                                 break;
 270                 }
 271         } else {
 272                 seq_printf(m, "not present\n");
 273         }
 274
 275         /* report bus speeds because we can */
 276         if ((equip_reg & 0x80) == 0) {
 277                 switch ((equip_reg & 0x30) >> 4) {
 278                         case 0x1:
 279                                 cpubus_speed = "50";
 280                                 pci_speed = "25";
 281                                 break;
 282                         case 0x3:
 283                                 cpubus_speed = "66";
 284                                 pci_speed = "33";
 285                                 break;
 286                         default:
 287                                 cpubus_speed = "unknown";
 288                                 pci_speed = "unknown";
 289                                 break;
 290                 }
 291         } else {
 292                 switch ((equip_reg & 0x30) >> 4) {
 293                         case 0x1:
 294                                 cpubus_speed = "25";
 295                                 pci_speed = "25";
 296                                 break;
 297                         case 0x2:
 298                                 cpubus_speed = "60";
 299                                 pci_speed = "30";
 300                                 break;
 301                         case 0x3:
 302                                 cpubus_speed = "33";
 303                                 pci_speed = "33";
 304                                 break;
 305                         default:
 306                                 cpubus_speed = "unknown";
 307                                 pci_speed = "unknown";
 308                                 break;
 309                 }
 310         }
 311         seq_printf(m, "60x bus\t\t: %sMHz\n", cpubus_speed);
 312         seq_printf(m, "pci bus\t\t: %sMHz\n", pci_speed);
 313
 314         return 0;
 315 }
 316
 317 static int __prep
 318 prep_carolina_cpuinfo(struct seq_file *m)
 319 {
 320         unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
 321
 322         prep_ibm_cpuinfo(m);
 323
 324         /* report amount and type of L2 cache present */
 325         seq_printf(m, "l2 cache\t: ");
 326         if ((equip_reg & 0x1) == 0) {
 327                 unsigned int l2_reg = inb(PREP_IBM_L2INFO);
 328
 329                 /* L2 size */
 330                 if ((l2_reg & 0x60) == 0)
 331                         seq_printf(m, "256KiB");
 332                 else if ((l2_reg & 0x60) == 0x20)
 333                         seq_printf(m, "512KiB");
 334                 else
 335                         seq_printf(m, "unknown size");
 336
 337                 /* L2 type */
 338                 if ((l2_reg & 0x3) == 0)
 339                         seq_printf(m, ", async");
 340                 else if ((l2_reg & 0x3) == 1)
 341                         seq_printf(m, ", sync");
 342                 else
 343                         seq_printf(m, ", unknown type");
 344
 345                 seq_printf(m, "\n");
 346         } else {
 347                 seq_printf(m, "not present\n");
 348         }
 349
 350         return 0;
 351 }
 352
 353 static int __prep
 354 prep_tiger1_cpuinfo(struct seq_file *m)
 355 {
 356         unsigned int l2_reg = inb(PREP_IBM_L2INFO);
 357
 358         prep_ibm_cpuinfo(m);
 359
 360         /* report amount and type of L2 cache present */
 361         seq_printf(m, "l2 cache\t: ");
 362         if ((l2_reg & 0xf) == 0xf) {
 363                 seq_printf(m, "not present\n");
 364         } else {
 365                 if (l2_reg & 0x8)
 366                         seq_printf(m, "async, ");
 367                 else
 368                         seq_printf(m, "sync burst, ");
 369
 370                 if (l2_reg & 0x4)
 371                         seq_printf(m, "parity, ");
 372                 else
 373                         seq_printf(m, "no parity, ");
 374
 375                 switch (l2_reg & 0x3) {
 376                         case 0x0:
 377                                 seq_printf(m, "256KiB\n");
 378                                 break;
 379                         case 0x1:
 380                                 seq_printf(m, "512KiB\n");
 381                                 break;
 382                         case 0x2:
 383                                 seq_printf(m, "1MiB\n");
 384                                 break;
 385                         default:
 386                                 seq_printf(m, "unknown size\n");
 387                                 break;
 388                 }
 389         }
 390
 391         return 0;
 392 }
 393
 394
 395 /* Used by all Motorola PReP */
 396 static int __prep
 397 prep_mot_cpuinfo(struct seq_file *m)
 398 {
 399         unsigned int cachew = *((unsigned char *)CACHECRBA);
 400
 401         seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
 402
 403         /* report amount and type of L2 cache present */
 404         seq_printf(m, "l2 cache\t: ");
 405         switch (cachew & L2CACHE_MASK) {
 406                 case L2CACHE_512KB:
 407                         seq_printf(m, "512KiB");
 408                         break;
 409                 case L2CACHE_256KB:
 410                         seq_printf(m, "256KiB");
 411                         break;
 412                 case L2CACHE_1MB:
 413                         seq_printf(m, "1MiB");
 414                         break;
 415                 case L2CACHE_NONE:
 416                         seq_printf(m, "none\n");
 417                         goto no_l2;
 418                         break;
 419                 default:
 420                         seq_printf(m, "%x\n", cachew);
 421         }
 422
 423         seq_printf(m, ", parity %s",
 424                         (cachew & L2CACHE_PARITY)? "enabled" : "disabled");
 425
 426         seq_printf(m, " SRAM:");
 427
 428         switch ( ((cachew & 0xf0) >> 4) & ~(0x3) ) {
 429                 case 1: seq_printf(m, "synchronous, parity, flow-through\n");
 430                                 break;
 431                 case 2: seq_printf(m, "asynchronous, no parity\n");
 432                                 break;
 433                 case 3: seq_printf(m, "asynchronous, parity\n");
 434                                 break;
 435                 default:seq_printf(m, "synchronous, pipelined, no parity\n");
 436                                 break;
 437         }
 438
 439 no_l2:
 440         /* print info about SIMMs */
 441         if (have_residual_data) {
 442                 int i;
 443                 seq_printf(m, "simms\t\t: ");
 444                 for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
 445                         if (res->Memories[i].SIMMSize != 0)
 446                                 seq_printf(m, "%d:%ldM ", i,
 447                                         (res->Memories[i].SIMMSize > 1024) ?
 448                                         res->Memories[i].SIMMSize>>20 :
 449                                         res->Memories[i].SIMMSize);
 450                 }
 451                 seq_printf(m, "\n");
 452         }
 453
 454         return 0;
 455 }
 456
 457 static void __prep
 458 prep_restart(char *cmd)
 459 {
 460 #define PREP_SP92       0x92    /* Special Port 92 */
 461         local_irq_disable(); /* no interrupts */
 462
 463         /* set exception prefix high - to the prom */
 464         _nmask_and_or_msr(0, MSR_IP);
 465
 466         /* make sure bit 0 (reset) is a 0 */
 467         outb( inb(PREP_SP92) & ~1L , PREP_SP92);
 468         /* signal a reset to system control port A - soft reset */
 469         outb( inb(PREP_SP92) | 1 , PREP_SP92);
 470
 471         while ( 1 ) ;
 472         /* not reached */
 473 #undef PREP_SP92
 474 }
 475
 476 static void __prep
 477 prep_halt(void)
 478 {
 479         local_irq_disable(); /* no interrupts */
 480
 481         /* set exception prefix high - to the prom */
 482         _nmask_and_or_msr(0, MSR_IP);
 483
 484         while ( 1 ) ;
 485         /* not reached */
 486 }
 487
 488 /* Carrera is the power manager in the Thinkpads. Unfortunately not much is
 489  * known about it, so we can't power down.
 490  */
 491 static void __prep
 492 prep_carrera_poweroff(void)
 493 {
 494         prep_halt();
 495 }
 496
 497 /*
 498  * On most IBM PReP's, power management is handled by a Signetics 87c750
 499  * behind the Utah component on the ISA bus. To access the 750 you must write
 500  * a series of nibbles to port 0x82a (decoded by the Utah). This is described
 501  * somewhat in the IBM Carolina Technical Specification.
 502  * -Hollis
 503  */
 504 static void __prep
 505 utah_sig87c750_setbit(unsigned int bytenum, unsigned int bitnum, int value)
 506 {
 507         /*
 508          * byte1: 0 0 0 1 0  d  a5 a4
 509          * byte2: 0 0 0 1 a3 a2 a1 a0
 510          *
 511          * d = the bit's value, enabled or disabled
 512          * (a5 a4 a3) = the byte number, minus 20
 513          * (a2 a1 a0) = the bit number
 514          *
 515          * example: set the 5th bit of byte 21 (21.5)
 516          *     a5 a4 a3 = 001 (byte 1)
 517          *     a2 a1 a0 = 101 (bit 5)
 518          *
 519          *     byte1 = 0001 0100 (0x14)
 520          *     byte2 = 0001 1101 (0x1d)
 521          */
 522         unsigned char byte1=0x10, byte2=0x10;
 523
 524         /* the 750's '20.0' is accessed as '0.0' through Utah (which adds 20) */
 525         bytenum -= 20;
 526
 527         byte1 |= (!!value) << 2;                /* set d */
 528         byte1 |= (bytenum >> 1) & 0x3;  /* set a5, a4 */
 529
 530         byte2 |= (bytenum & 0x1) << 3;  /* set a3 */
 531         byte2 |= bitnum & 0x7;                  /* set a2, a1, a0 */
 532
 533         outb(byte1, PREP_IBM_PM1);      /* first nibble */
 534         mb();
 535         udelay(100);                            /* important: let controller recover */
 536
 537         outb(byte2, PREP_IBM_PM1);      /* second nibble */
 538         mb();
 539         udelay(100);                            /* important: let controller recover */
 540 }
 541
 542 static void __prep
 543 prep_sig750_poweroff(void)
 544 {
 545         /* tweak the power manager found in most IBM PRePs (except Thinkpads) */
 546
 547         local_irq_disable();
 548         /* set exception prefix high - to the prom */
 549         _nmask_and_or_msr(0, MSR_IP);
 550
 551         utah_sig87c750_setbit(21, 5, 1); /* set bit 21.5, "PMEXEC_OFF" */
 552
 553         while (1) ;
 554         /* not reached */
 555 }
 556
 557 static int __prep
 558 prep_show_percpuinfo(struct seq_file *m, int i)
 559 {
 560         /* PREP's without residual data will give incorrect values here */
 561         seq_printf(m, "clock\t\t: ");
 562         if (have_residual_data)
 563                 seq_printf(m, "%ldMHz\n",
 564                            (res->VitalProductData.ProcessorHz > 1024) ?
 565                            res->VitalProductData.ProcessorHz / 1000000 :
 566                            res->VitalProductData.ProcessorHz);
 567         else
 568                 seq_printf(m, "???\n");
 569
 570         return 0;
 571 }
 572
 573 #ifdef CONFIG_SOUND_CS4232
 574 static long __init masktoint(unsigned int i)
 575 {
 576         int t = -1;
 577         while (i >> ++t)
 578                 ;
 579         return (t-1);
 580 }
 581
 582 /*
 583  * ppc_cs4232_dma and ppc_cs4232_dma2 are used in include/asm/dma.h
 584  * to distinguish sound dma-channels from others. This is because
 585  * blocksize on 16 bit dma-channels 5,6,7 is 128k, but
 586  * the cs4232.c uses 64k like on 8 bit dma-channels 0,1,2,3
 587  */
 588
 589 static void __init prep_init_sound(void)
 590 {
 591         PPC_DEVICE *audiodevice = NULL;
 592
 593         /*
 594          * Get the needed resource informations from residual data.
 595          *
 596          */
 597         if (have_residual_data)
 598                 audiodevice = residual_find_device(~0, NULL,
 599                                 MultimediaController, AudioController, -1, 0);
 600
 601         if (audiodevice != NULL) {
 602                 PnP_TAG_PACKET *pkt;
 603
 604                 pkt = PnP_find_packet((unsigned char *)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
 605                                 S5_Packet, 0);
 606                 if (pkt != NULL)
 607                         ppc_cs4232_dma = masktoint(pkt->S5_Pack.DMAMask);
 608                 pkt = PnP_find_packet((unsigned char*)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
 609                                 S5_Packet, 1);
 610                 if (pkt != NULL)
 611                         ppc_cs4232_dma2 = masktoint(pkt->S5_Pack.DMAMask);
 612         }
 613
 614         /*
 615          * These are the PReP specs' defaults for the cs4231.  We use these
 616          * as fallback incase we don't have residual data.
 617          * At least the IBM Thinkpad 850 with IDE DMA Channels at 6 and 7
 618          * will use the other values.
 619          */
 620         if (audiodevice == NULL) {
 621                 switch (_prep_type) {
 622                 case _PREP_IBM:
 623                         ppc_cs4232_dma = 1;
 624                         ppc_cs4232_dma2 = -1;
 625                         break;
 626                 default:
 627                         ppc_cs4232_dma = 6;
 628                         ppc_cs4232_dma2 = 7;
 629                 }
 630         }
 631
 632         /*
 633          * Find a way to push these informations to the cs4232 driver
 634          * Give it out with printk, when not in cmd_line?
 635          * Append it to  cmd_line and saved_command_line?
 636          * Format is cs4232=io,irq,dma,dma2
 637          */
 638 }
 639 #endif /* CONFIG_SOUND_CS4232 */
 640
 641 /*
 642  * Fill out screen_info according to the residual data. This allows us to use
 643  * at least vesafb.
 644  */
 645 static void __init
 646 prep_init_vesa(void)
 647 {
 648 #if     (defined(CONFIG_FB_VGA16) || defined(CONFIG_FB_VGA16_MODULE) || \
 649          defined(CONFIG_FB_VESA))
 650         PPC_DEVICE *vgadev = NULL;
 651
 652         if (have_residual_data)
 653                 vgadev = residual_find_device(~0, NULL, DisplayController,
 654                                                         SVGAController, -1, 0);
 655
 656         if (vgadev != NULL) {
 657                 PnP_TAG_PACKET *pkt;
 658
 659                 pkt = PnP_find_large_vendor_packet(
 660                                 (unsigned char *)&res->DevicePnPHeap[vgadev->AllocatedOffset],
 661                                 0x04, 0); /* 0x04 = Display Tag */
 662                 if (pkt != NULL) {
 663                         unsigned char *ptr = (unsigned char *)pkt;
 664
 665                         if (ptr[4]) {
 666                                 /* graphics mode */
 667                                 screen_info.orig_video_isVGA = VIDEO_TYPE_VLFB;
 668
 669                                 screen_info.lfb_depth = ptr[4] * 8;
 670
 671                                 screen_info.lfb_width = swab16(*(short *)(ptr+6));
 672                                 screen_info.lfb_height = swab16(*(short *)(ptr+8));
 673                                 screen_info.lfb_linelength = swab16(*(short *)(ptr+10));
 674
 675                                 screen_info.lfb_base = swab32(*(long *)(ptr+12));
 676                                 screen_info.lfb_size = swab32(*(long *)(ptr+20)) / 65536;
 677                         }
 678                 }
 679         }
 680 #endif
 681 }
 682
 683 /*
 684  * Set DBAT 2 to access 0x80000000 so early progress messages will work
 685  */
 686 static __inline__ void
 687 prep_set_bat(void)
 688 {
 689         /* wait for all outstanding memory access to complete */
 690         mb();
 691
 692         /* setup DBATs */
 693         mtspr(SPRN_DBAT2U, 0x80001ffe);
 694         mtspr(SPRN_DBAT2L, 0x8000002a);
 695
 696         /* wait for updates */
 697         mb();
 698 }
 699
 700 /*
 701  * IBM 3-digit status LED
 702  */
 703 static unsigned int ibm_statusled_base __prepdata;
 704
 705 static void __prep
 706 ibm_statusled_progress(char *s, unsigned short hex);
 707
 708 static int __prep
 709 ibm_statusled_panic(struct notifier_block *dummy1, unsigned long dummy2,
 710                     void * dummy3)
 711 {
 712         ibm_statusled_progress(NULL, 0x505); /* SOS */
 713         return NOTIFY_DONE;
 714 }
 715
 716 static struct notifier_block ibm_statusled_block __prepdata = {
 717         ibm_statusled_panic,
 718         NULL,
 719         INT_MAX /* try to do it first */
 720 };
 721
 722 static void __prep
 723 ibm_statusled_progress(char *s, unsigned short hex)
 724 {
 725         static int notifier_installed;
 726         /*
 727          * Progress uses 4 digits and we have only 3.  So, we map 0xffff to
 728          * 0xfff for display switch off.  Out of range values are mapped to
 729          * 0xeff, as I'm told 0xf00 and above are reserved for hardware codes.
 730          * Install the panic notifier when the display is first switched off.
 731          */
 732         if (hex == 0xffff) {
 733                 hex = 0xfff;
 734                 if (!notifier_installed) {
 735                         ++notifier_installed;
 736                         notifier_chain_register(&panic_notifier_list,
 737                                                 &ibm_statusled_block);
 738                 }
 739         }
 740         else
 741                 if (hex > 0xfff)
 742                         hex = 0xeff;
 743
 744         mb();
 745         outw(hex, ibm_statusled_base);
 746 }
 747
 748 static void __init
 749 ibm_statusled_init(void)
 750 {
 751         /*
 752          * The IBM 3-digit LED display is specified in the residual data
 753          * as an operator panel device, type "System Status LED".  Find
 754          * that device and determine its address.  We validate all the
 755          * other parameters on the off-chance another, similar device
 756          * exists.
 757          */
 758         if (have_residual_data) {
 759                 PPC_DEVICE *led;
 760                 PnP_TAG_PACKET *pkt;
 761
 762                 led = residual_find_device(~0, NULL, SystemPeripheral,
 763                                            OperatorPanel, SystemStatusLED, 0);
 764                 if (!led)
 765                         return;
 766
 767                 pkt = PnP_find_packet((unsigned char *)
 768                        &res->DevicePnPHeap[led->AllocatedOffset], S8_Packet, 0);
 769                 if (!pkt)
 770                         return;
 771
 772                 if (pkt->S8_Pack.IOInfo != ISAAddr16bit)
 773                         return;
 774                 if (*(unsigned short *)pkt->S8_Pack.RangeMin !=
 775                     *(unsigned short *)pkt->S8_Pack.RangeMax)
 776                         return;
 777                 if (pkt->S8_Pack.IOAlign != 2)
 778                         return;
 779                 if (pkt->S8_Pack.IONum != 2)
 780                         return;
 781
 782                 ibm_statusled_base = ld_le16((unsigned short *)
 783                                              (pkt->S8_Pack.RangeMin));
 784                 ppc_md.progress = ibm_statusled_progress;
 785         }
 786 }
 787
 788 static void __init
 789 prep_setup_arch(void)
 790 {
 791         unsigned char reg;
 792         int is_ide=0;
 793
 794         /* init to some ~sane value until calibrate_delay() runs */
 795         loops_per_jiffy = 50000000;
 796
 797         /* Lookup PCI host bridges */
 798         prep_find_bridges();
 799
 800         /* Set up floppy in PS/2 mode */
 801         outb(0x09, SIO_CONFIG_RA);
 802         reg = inb(SIO_CONFIG_RD);
 803         reg = (reg & 0x3F) | 0x40;
 804         outb(reg, SIO_CONFIG_RD);
 805         outb(reg, SIO_CONFIG_RD);       /* Have to write twice to change! */
 806
 807         switch ( _prep_type )
 808         {
 809         case _PREP_IBM:
 810                 reg = inb(PREP_IBM_PLANAR);
 811                 printk(KERN_INFO "IBM planar ID: %02x", reg);
 812                 switch (reg) {
 813                         case PREP_IBM_SANDALFOOT:
 814                                 prep_gen_enable_l2();
 815                                 setup_ibm_pci = prep_sandalfoot_setup_pci;
 816                                 ppc_md.power_off = prep_sig750_poweroff;
 817                                 ppc_md.show_cpuinfo = prep_sandalfoot_cpuinfo;
 818                                 break;
 819                         case PREP_IBM_THINKPAD:
 820                                 prep_gen_enable_l2();
 821                                 setup_ibm_pci = prep_thinkpad_setup_pci;
 822                                 ppc_md.power_off = prep_carrera_poweroff;
 823                                 ppc_md.show_cpuinfo = prep_thinkpad_cpuinfo;
 824                                 break;
 825                         default:
 826                                 if (have_residual_data) {
 827                                         prep_gen_enable_l2();
 828                                         setup_ibm_pci = prep_residual_setup_pci;
 829                                         ppc_md.power_off = prep_halt;
 830                                         ppc_md.show_cpuinfo = prep_gen_cpuinfo;
 831                                         break;
 832                                 }
 833                                 else
 834                                         printk(" - unknown! Assuming Carolina");
 835                                         /* fall through */
 836                         case PREP_IBM_CAROLINA_IDE_0:
 837                         case PREP_IBM_CAROLINA_IDE_1:
 838                         case PREP_IBM_CAROLINA_IDE_2:
 839                         case PREP_IBM_CAROLINA_IDE_3:
 840                                 is_ide = 1;
 841                         case PREP_IBM_CAROLINA_SCSI_0:
 842                         case PREP_IBM_CAROLINA_SCSI_1:
 843                         case PREP_IBM_CAROLINA_SCSI_2:
 844                         case PREP_IBM_CAROLINA_SCSI_3:
 845                                 prep_carolina_enable_l2();
 846                                 setup_ibm_pci = prep_carolina_setup_pci;
 847                                 ppc_md.power_off = prep_sig750_poweroff;
 848                                 ppc_md.show_cpuinfo = prep_carolina_cpuinfo;
 849                                 break;
 850                         case PREP_IBM_TIGER1_133:
 851                         case PREP_IBM_TIGER1_166:
 852                         case PREP_IBM_TIGER1_180:
 853                         case PREP_IBM_TIGER1_xxx:
 854                         case PREP_IBM_TIGER1_333:
 855                                 prep_carolina_enable_l2();
 856                                 setup_ibm_pci = prep_tiger1_setup_pci;
 857                                 ppc_md.power_off = prep_sig750_poweroff;
 858                                 ppc_md.show_cpuinfo = prep_tiger1_cpuinfo;
 859                                 break;
 860                 }
 861                 printk("\n");
 862
 863                 /* default root device */
 864                 if (is_ide)
 865                         ROOT_DEV = MKDEV(IDE0_MAJOR, 3);
 866                 else
 867                         ROOT_DEV = MKDEV(SCSI_DISK0_MAJOR, 3);
 868
 869                 break;
 870         case _PREP_Motorola:
 871                 prep_gen_enable_l2();
 872                 ppc_md.power_off = prep_halt;
 873                 ppc_md.show_cpuinfo = prep_mot_cpuinfo;
 874
 875 #ifdef CONFIG_BLK_DEV_INITRD
 876                 if (initrd_start)
 877                         ROOT_DEV = Root_RAM0;
 878                 else
 879 #endif
 880 #ifdef CONFIG_ROOT_NFS
 881                         ROOT_DEV = Root_NFS;
 882 #else
 883                         ROOT_DEV = Root_SDA2;
 884 #endif
 885                 break;
 886         }
 887
 888         /* Read in NVRAM data */
 889         init_prep_nvram();
 890
 891         /* if no bootargs, look in NVRAM */
 892         if ( cmd_line[0] == '\0' ) {
 893                 char *bootargs;
 894                  bootargs = prep_nvram_get_var("bootargs");
 895                  if (bootargs != NULL) {
 896                          strcpy(cmd_line, bootargs);
 897                          /* again.. */
 898                          strcpy(saved_command_line, cmd_line);
 899                 }
 900         }
 901
 902 #ifdef CONFIG_SOUND_CS4232
 903         prep_init_sound();
 904 #endif /* CONFIG_SOUND_CS4232 */
 905
 906         prep_init_vesa();
 907
 908         switch (_prep_type) {
 909         case _PREP_Motorola:
 910                 raven_init();
 911                 break;
 912         case _PREP_IBM:
 913                 ibm_prep_init();
 914                 break;
 915         }
 916
 917 #ifdef CONFIG_VGA_CONSOLE
 918         /* vgacon.c needs to know where we mapped IO memory in io_block_mapping() */
 919         vgacon_remap_base = 0xf0000000;
 920         conswitchp = &vga_con;
 921 #endif
 922 }
 923
 924 /*
 925  * First, see if we can get this information from the residual data.
 926  * This is important on some IBM PReP systems.  If we cannot, we let the
 927  * TODC code handle doing this.
 928  */
 929 static void __init
 930 prep_calibrate_decr(void)
 931 {
 932         if (have_residual_data) {
 933                 unsigned long freq, divisor = 4;
 934
 935                 if ( res->VitalProductData.ProcessorBusHz ) {
 936                         freq = res->VitalProductData.ProcessorBusHz;
 937                         printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
 938                                         (freq/divisor)/1000000,
 939                                         (freq/divisor)%1000000);
 940                         tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
 941                         tb_ticks_per_jiffy = freq / HZ / divisor;
 942                 }
 943         }
 944         else
 945                 todc_calibrate_decr();
 946 }
 947
 948 static unsigned int __prep
 949 prep_irq_canonicalize(u_int irq)
 950 {
 951         if (irq == 2)
 952         {
 953                 return 9;
 954         }
 955         else
 956         {
 957                 return irq;
 958         }
 959 }
 960
 961 static void __init
 962 prep_init_IRQ(void)
 963 {
 964         int i;
 965         unsigned int pci_viddid, pci_did;
 966
 967         if (OpenPIC_Addr != NULL) {
 968                 openpic_init(NUM_8259_INTERRUPTS);
 969                 /* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
 970                 openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
 971                                        i8259_irq);
 972         }
 973         for ( i = 0 ; i < NUM_8259_INTERRUPTS ; i++ )
 974                 irq_desc[i].handler = &i8259_pic;
 975
 976         if (have_residual_data) {
 977                 i8259_init(residual_isapic_addr());
 978                 return;
 979         }
 980
 981         /* If we have a Raven PCI bridge or a Hawk PCI bridge / Memory
 982          * controller, we poll (as they have a different int-ack address). */
 983         early_read_config_dword(NULL, 0, 0, PCI_VENDOR_ID, &pci_viddid);
 984         pci_did = (pci_viddid & 0xffff0000) >> 16;
 985         if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_MOTOROLA)
 986                         && ((pci_did == PCI_DEVICE_ID_MOTOROLA_RAVEN)
 987                                 || (pci_did == PCI_DEVICE_ID_MOTOROLA_HAWK)))
 988                 i8259_init(0);
 989         else
 990                 /* PCI interrupt ack address given in section 6.1.8 of the
 991                  * PReP specification. */
 992                 i8259_init(MPC10X_MAPA_PCI_INTACK_ADDR);
 993 }
 994
 995 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
 996 /*
 997  * IDE stuff.
 998  */
 999 static int __prep
1000 prep_ide_default_irq(unsigned long base)
1001 {
1002         switch (base) {
1003                 case 0x1f0: return 13;
1004                 case 0x170: return 13;
1005                 case 0x1e8: return 11;
1006                 case 0x168: return 10;
1007                 case 0xfff0: return 14;         /* MCP(N)750 ide0 */
1008                 case 0xffe0: return 15;         /* MCP(N)750 ide1 */
1009                 default: return 0;
1010         }
1011 }
1012
1013 static unsigned long __prep
1014 prep_ide_default_io_base(int index)
1015 {
1016         switch (index) {
1017                 case 0: return 0x1f0;
1018                 case 1: return 0x170;
1019                 case 2: return 0x1e8;
1020                 case 3: return 0x168;
1021                 default:
1022                         return 0;
1023         }
1024 }
1025 #endif
1026
1027 #ifdef CONFIG_SMP
1028 /* PReP (MTX) support */
1029 static int __init
1030 smp_prep_probe(void)
1031 {
1032         extern int mot_multi;
1033
1034         if (mot_multi) {
1035                 openpic_request_IPIs();
1036                 smp_hw_index[1] = 1;
1037                 return 2;
1038         }
1039
1040         return 1;
1041 }
1042
1043 static void __init
1044 smp_prep_kick_cpu(int nr)
1045 {
1046         *(unsigned long *)KERNELBASE = nr;
1047         asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
1048         printk("CPU1 released, waiting\n");
1049 }
1050
1051 static void __init
1052 smp_prep_setup_cpu(int cpu_nr)
1053 {
1054         if (OpenPIC_Addr)
1055                 do_openpic_setup_cpu();
1056 }
1057
1058 static struct smp_ops_t prep_smp_ops __prepdata = {
1059         smp_openpic_message_pass,
1060         smp_prep_probe,
1061         smp_prep_kick_cpu,
1062         smp_prep_setup_cpu,
1063         .give_timebase = smp_generic_give_timebase,
1064         .take_timebase = smp_generic_take_timebase,
1065 };
1066 #endif /* CONFIG_SMP */
1067
1068 /*
1069  * Setup the bat mappings we're going to load that cover
1070  * the io areas.  RAM was mapped by mapin_ram().
1071  * -- Cort
1072  */
1073 static void __init
1074 prep_map_io(void)
1075 {
1076         io_block_mapping(0x80000000, PREP_ISA_IO_BASE, 0x10000000, _PAGE_IO);
1077         io_block_mapping(0xf0000000, PREP_ISA_MEM_BASE, 0x08000000, _PAGE_IO);
1078 }
1079
1080 static int __init
1081 prep_request_io(void)
1082 {
1083         if (_machine == _MACH_prep) {
1084 #ifdef CONFIG_NVRAM
1085                 request_region(PREP_NVRAM_AS0, 0x8, "nvram");
1086 #endif
1087                 request_region(0x00,0x20,"dma1");
1088                 request_region(0x40,0x20,"timer");
1089                 request_region(0x80,0x10,"dma page reg");
1090                 request_region(0xc0,0x20,"dma2");
1091         }
1092
1093         return 0;
1094 }
1095
1096 device_initcall(prep_request_io);
1097
1098 void __init
1099 prep_init(unsigned long r3, unsigned long r4, unsigned long r5,
1100                 unsigned long r6, unsigned long r7)
1101 {
1102 #ifdef CONFIG_PREP_RESIDUAL
1103         /* make a copy of residual data */
1104         if ( r3 ) {
1105                 memcpy((void *)res,(void *)(r3+KERNELBASE),
1106                          sizeof(RESIDUAL));
1107         }
1108 #endif
1109
1110         isa_io_base = PREP_ISA_IO_BASE;
1111         isa_mem_base = PREP_ISA_MEM_BASE;
1112         pci_dram_offset = PREP_PCI_DRAM_OFFSET;
1113         ISA_DMA_THRESHOLD = 0x00ffffff;
1114         DMA_MODE_READ = 0x44;
1115         DMA_MODE_WRITE = 0x48;
1116
1117         /* figure out what kind of prep workstation we are */
1118         if (have_residual_data) {
1119                 if ( !strncmp(res->VitalProductData.PrintableModel,"IBM",3) )
1120                         _prep_type = _PREP_IBM;
1121                 else
1122                         _prep_type = _PREP_Motorola;
1123         }
1124         else {
1125                 /* assume motorola if no residual (netboot?) */
1126                 _prep_type = _PREP_Motorola;
1127         }
1128
1129 #ifdef CONFIG_PREP_RESIDUAL
1130         /* Switch off all residual data processing if the user requests it */
1131         if (strstr(cmd_line, "noresidual") != NULL)
1132                         res = NULL;
1133 #endif
1134
1135         /* Initialise progress early to get maximum benefit */
1136         prep_set_bat();
1137         ibm_statusled_init();
1138
1139         ppc_md.setup_arch     = prep_setup_arch;
1140         ppc_md.show_percpuinfo = prep_show_percpuinfo;
1141         ppc_md.show_cpuinfo   = NULL; /* set in prep_setup_arch() */
1142         ppc_md.irq_canonicalize = prep_irq_canonicalize;
1143         ppc_md.init_IRQ       = prep_init_IRQ;
1144         /* this gets changed later on if we have an OpenPIC -- Cort */
1145         ppc_md.get_irq        = i8259_irq;
1146
1147         ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
1148
1149         ppc_md.restart        = prep_restart;
1150         ppc_md.power_off      = NULL; /* set in prep_setup_arch() */
1151         ppc_md.halt           = prep_halt;
1152
1153         ppc_md.nvram_read_val = prep_nvram_read_val;
1154         ppc_md.nvram_write_val = prep_nvram_write_val;
1155
1156         ppc_md.time_init      = todc_time_init;
1157         if (_prep_type == _PREP_IBM) {
1158                 ppc_md.rtc_read_val = todc_mc146818_read_val;
1159                 ppc_md.rtc_write_val = todc_mc146818_write_val;
1160                 TODC_INIT(TODC_TYPE_MC146818, RTC_PORT(0), NULL, RTC_PORT(1),
1161                                 8);
1162         } else {
1163                 TODC_INIT(TODC_TYPE_MK48T59, PREP_NVRAM_AS0, PREP_NVRAM_AS1,
1164                                 PREP_NVRAM_DATA, 8);
1165         }
1166
1167         ppc_md.calibrate_decr = prep_calibrate_decr;
1168         ppc_md.set_rtc_time   = todc_set_rtc_time;
1169         ppc_md.get_rtc_time   = todc_get_rtc_time;
1170
1171         ppc_md.setup_io_mappings = prep_map_io;
1172
1173 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
1174         ppc_ide_md.default_irq = prep_ide_default_irq;
1175         ppc_ide_md.default_io_base = prep_ide_default_io_base;
1176 #endif
1177
1178 #ifdef CONFIG_SMP
1179         ppc_md.smp_ops           = &prep_smp_ops;
1180 #endif /* CONFIG_SMP */
1181 }