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   1 /*  $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $
   2  *  linux/arch/sparc64/kernel/setup.c
   3  *
   4  *  Copyright (C) 1995,1996  David S. Miller (davem@caip.rutgers.edu)
   5  *  Copyright (C) 1997       Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6  */
   7
   8 #include <linux/errno.h>
   9 #include <linux/sched.h>
  10 #include <linux/kernel.h>
  11 #include <linux/mm.h>
  12 #include <linux/stddef.h>
  13 #include <linux/unistd.h>
  14 #include <linux/ptrace.h>
  15 #include <linux/slab.h>
  16 #include <asm/smp.h>
  17 #include <linux/user.h>
  18 #include <linux/a.out.h>
  19 #include <linux/screen_info.h>
  20 #include <linux/delay.h>
  21 #include <linux/fs.h>
  22 #include <linux/seq_file.h>
  23 #include <linux/syscalls.h>
  24 #include <linux/kdev_t.h>
  25 #include <linux/major.h>
  26 #include <linux/string.h>
  27 #include <linux/init.h>
  28 #include <linux/inet.h>
  29 #include <linux/console.h>
  30 #include <linux/root_dev.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/cpu.h>
  33 #include <linux/initrd.h>
  34
  35 #include <asm/system.h>
  36 #include <asm/io.h>
  37 #include <asm/processor.h>
  38 #include <asm/oplib.h>
  39 #include <asm/page.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/idprom.h>
  42 #include <asm/head.h>
  43 #include <asm/starfire.h>
  44 #include <asm/mmu_context.h>
  45 #include <asm/timer.h>
  46 #include <asm/sections.h>
  47 #include <asm/setup.h>
  48 #include <asm/mmu.h>
  49
  50 #ifdef CONFIG_IP_PNP
  51 #include <net/ipconfig.h>
  52 #endif
  53
  54 struct screen_info screen_info = {
  55         0, 0,                   /* orig-x, orig-y */
  56         0,                      /* unused */
  57         0,                      /* orig-video-page */
  58         0,                      /* orig-video-mode */
  59         128,                    /* orig-video-cols */
  60         0, 0, 0,                /* unused, ega_bx, unused */
  61         54,                     /* orig-video-lines */
  62         0,                      /* orig-video-isVGA */
  63         16                      /* orig-video-points */
  64 };
  65
  66 void (*prom_palette)(int);
  67 void (*prom_keyboard)(void);
  68
  69 static void
  70 prom_console_write(struct console *con, const char *s, unsigned n)
  71 {
  72         prom_write(s, n);
  73 }
  74
  75 unsigned int boot_flags = 0;
  76 #define BOOTME_DEBUG  0x1
  77 #define BOOTME_SINGLE 0x2
  78
  79 /* Exported for mm/init.c:paging_init. */
  80 unsigned long cmdline_memory_size = 0;
  81
  82 static struct console prom_debug_console = {
  83         .name =         "debug",
  84         .write =        prom_console_write,
  85         .flags =        CON_PRINTBUFFER,
  86         .index =        -1,
  87 };
  88
  89 /* XXX Implement this at some point... */
  90 void kernel_enter_debugger(void)
  91 {
  92 }
  93
  94 int obp_system_intr(void)
  95 {
  96         if (boot_flags & BOOTME_DEBUG) {
  97                 printk("OBP: system interrupted\n");
  98                 prom_halt();
  99                 return 1;
 100         }
 101         return 0;
 102 }
 103
 104 /*
 105  * Process kernel command line switches that are specific to the
 106  * SPARC or that require special low-level processing.
 107  */
 108 static void __init process_switch(char c)
 109 {
 110         switch (c) {
 111         case 'd':
 112                 boot_flags |= BOOTME_DEBUG;
 113                 break;
 114         case 's':
 115                 boot_flags |= BOOTME_SINGLE;
 116                 break;
 117         case 'h':
 118                 prom_printf("boot_flags_init: Halt!\n");
 119                 prom_halt();
 120                 break;
 121         case 'p':
 122                 /* Use PROM debug console. */
 123                 register_console(&prom_debug_console);
 124                 break;
 125         case 'P':
 126                 /* Force UltraSPARC-III P-Cache on. */
 127                 if (tlb_type != cheetah) {
 128                         printk("BOOT: Ignoring P-Cache force option.\n");
 129                         break;
 130                 }
 131                 cheetah_pcache_forced_on = 1;
 132                 add_taint(TAINT_MACHINE_CHECK);
 133                 cheetah_enable_pcache();
 134                 break;
 135
 136         default:
 137                 printk("Unknown boot switch (-%c)\n", c);
 138                 break;
 139         }
 140 }
 141
 142 static void __init process_console(char *commands)
 143 {
 144         serial_console = 0;
 145         commands += 8;
 146         /* Linux-style serial */
 147         if (!strncmp(commands, "ttyS", 4))
 148                 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
 149         else if (!strncmp(commands, "tty", 3)) {
 150                 char c = *(commands + 3);
 151                 /* Solaris-style serial */
 152                 if (c == 'a' || c == 'b') {
 153                         serial_console = c - 'a' + 1;
 154                         prom_printf ("Using /dev/tty%c as console.\n", c);
 155                 }
 156                 /* else Linux-style fbcon, not serial */
 157         }
 158 #if defined(CONFIG_PROM_CONSOLE)
 159         if (!strncmp(commands, "prom", 4)) {
 160                 char *p;
 161
 162                 for (p = commands - 8; *p && *p != ' '; p++)
 163                         *p = ' ';
 164                 conswitchp = &prom_con;
 165         }
 166 #endif
 167 }
 168
 169 static void __init boot_flags_init(char *commands)
 170 {
 171         while (*commands) {
 172                 /* Move to the start of the next "argument". */
 173                 while (*commands && *commands == ' ')
 174                         commands++;
 175
 176                 /* Process any command switches, otherwise skip it. */
 177                 if (*commands == '\0')
 178                         break;
 179                 if (*commands == '-') {
 180                         commands++;
 181                         while (*commands && *commands != ' ')
 182                                 process_switch(*commands++);
 183                         continue;
 184                 }
 185                 if (!strncmp(commands, "console=", 8)) {
 186                         process_console(commands);
 187                 } else if (!strncmp(commands, "mem=", 4)) {
 188                         /*
 189                          * "mem=XXX[kKmM]" overrides the PROM-reported
 190                          * memory size.
 191                          */
 192                         cmdline_memory_size = simple_strtoul(commands + 4,
 193                                                              &commands, 0);
 194                         if (*commands == 'K' || *commands == 'k') {
 195                                 cmdline_memory_size <<= 10;
 196                                 commands++;
 197                         } else if (*commands=='M' || *commands=='m') {
 198                                 cmdline_memory_size <<= 20;
 199                                 commands++;
 200                         }
 201                 }
 202                 while (*commands && *commands != ' ')
 203                         commands++;
 204         }
 205 }
 206
 207 extern void panic_setup(char *, int *);
 208
 209 extern unsigned short root_flags;
 210 extern unsigned short root_dev;
 211 extern unsigned short ram_flags;
 212 #define RAMDISK_IMAGE_START_MASK        0x07FF
 213 #define RAMDISK_PROMPT_FLAG             0x8000
 214 #define RAMDISK_LOAD_FLAG               0x4000
 215
 216 extern int root_mountflags;
 217
 218 char reboot_command[COMMAND_LINE_SIZE];
 219
 220 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
 221
 222 void __init per_cpu_patch(void)
 223 {
 224         struct cpuid_patch_entry *p;
 225         unsigned long ver;
 226         int is_jbus;
 227
 228         if (tlb_type == spitfire && !this_is_starfire)
 229                 return;
 230
 231         is_jbus = 0;
 232         if (tlb_type != hypervisor) {
 233                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
 234                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
 235                            (ver >> 32UL) == __SERRANO_ID);
 236         }
 237
 238         p = &__cpuid_patch;
 239         while (p < &__cpuid_patch_end) {
 240                 unsigned long addr = p->addr;
 241                 unsigned int *insns;
 242
 243                 switch (tlb_type) {
 244                 case spitfire:
 245                         insns = &p->starfire[0];
 246                         break;
 247                 case cheetah:
 248                 case cheetah_plus:
 249                         if (is_jbus)
 250                                 insns = &p->cheetah_jbus[0];
 251                         else
 252                                 insns = &p->cheetah_safari[0];
 253                         break;
 254                 case hypervisor:
 255                         insns = &p->sun4v[0];
 256                         break;
 257                 default:
 258                         prom_printf("Unknown cpu type, halting.\n");
 259                         prom_halt();
 260                 };
 261
 262                 *(unsigned int *) (addr +  0) = insns[0];
 263                 wmb();
 264                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 265
 266                 *(unsigned int *) (addr +  4) = insns[1];
 267                 wmb();
 268                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 269
 270                 *(unsigned int *) (addr +  8) = insns[2];
 271                 wmb();
 272                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
 273
 274                 *(unsigned int *) (addr + 12) = insns[3];
 275                 wmb();
 276                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
 277
 278                 p++;
 279         }
 280 }
 281
 282 void __init sun4v_patch(void)
 283 {
 284         struct sun4v_1insn_patch_entry *p1;
 285         struct sun4v_2insn_patch_entry *p2;
 286
 287         if (tlb_type != hypervisor)
 288                 return;
 289
 290         p1 = &__sun4v_1insn_patch;
 291         while (p1 < &__sun4v_1insn_patch_end) {
 292                 unsigned long addr = p1->addr;
 293
 294                 *(unsigned int *) (addr +  0) = p1->insn;
 295                 wmb();
 296                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 297
 298                 p1++;
 299         }
 300
 301         p2 = &__sun4v_2insn_patch;
 302         while (p2 < &__sun4v_2insn_patch_end) {
 303                 unsigned long addr = p2->addr;
 304
 305                 *(unsigned int *) (addr +  0) = p2->insns[0];
 306                 wmb();
 307                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 308
 309                 *(unsigned int *) (addr +  4) = p2->insns[1];
 310                 wmb();
 311                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 312
 313                 p2++;
 314         }
 315 }
 316
 317 #ifdef CONFIG_SMP
 318 void __init boot_cpu_id_too_large(int cpu)
 319 {
 320         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
 321                     cpu, NR_CPUS);
 322         prom_halt();
 323 }
 324 #endif
 325
 326 void __init setup_arch(char **cmdline_p)
 327 {
 328         /* Initialize PROM console and command line. */
 329         *cmdline_p = prom_getbootargs();
 330         strcpy(saved_command_line, *cmdline_p);
 331
 332         if (tlb_type == hypervisor)
 333                 printk("ARCH: SUN4V\n");
 334         else
 335                 printk("ARCH: SUN4U\n");
 336
 337 #ifdef CONFIG_DUMMY_CONSOLE
 338         conswitchp = &dummy_con;
 339 #elif defined(CONFIG_PROM_CONSOLE)
 340         conswitchp = &prom_con;
 341 #endif
 342
 343         boot_flags_init(*cmdline_p);
 344
 345         idprom_init();
 346
 347         if (!root_flags)
 348                 root_mountflags &= ~MS_RDONLY;
 349         ROOT_DEV = old_decode_dev(root_dev);
 350 #ifdef CONFIG_BLK_DEV_RAM
 351         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
 352         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
 353         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
 354 #endif
 355
 356         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
 357
 358 #ifdef CONFIG_IP_PNP
 359         if (!ic_set_manually) {
 360                 int chosen = prom_finddevice ("/chosen");
 361                 u32 cl, sv, gw;
 362
 363                 cl = prom_getintdefault (chosen, "client-ip", 0);
 364                 sv = prom_getintdefault (chosen, "server-ip", 0);
 365                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
 366                 if (cl && sv) {
 367                         ic_myaddr = cl;
 368                         ic_servaddr = sv;
 369                         if (gw)
 370                                 ic_gateway = gw;
 371 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
 372                         ic_proto_enabled = 0;
 373 #endif
 374                 }
 375         }
 376 #endif
 377
 378         /* Get boot processor trap_block[] setup.  */
 379         init_cur_cpu_trap(current_thread_info());
 380
 381         paging_init();
 382
 383         smp_setup_cpu_possible_map();
 384 }
 385
 386 static int __init set_preferred_console(void)
 387 {
 388         int idev, odev;
 389
 390         /* The user has requested a console so this is already set up. */
 391         if (serial_console >= 0)
 392                 return -EBUSY;
 393
 394         idev = prom_query_input_device();
 395         odev = prom_query_output_device();
 396         if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
 397                 serial_console = 0;
 398         } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
 399                 serial_console = 1;
 400         } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
 401                 serial_console = 2;
 402         } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) {
 403                 serial_console = 3;
 404         } else if (idev == PROMDEV_IVCONS && odev == PROMDEV_OVCONS) {
 405                 /* sunhv_console_init() doesn't check the serial_console
 406                  * value anyways...
 407                  */
 408                 serial_console = 4;
 409                 return add_preferred_console("ttyHV", 0, NULL);
 410         } else {
 411                 prom_printf("Inconsistent console: "
 412                             "input %d, output %d\n",
 413                             idev, odev);
 414                 prom_halt();
 415         }
 416
 417         if (serial_console)
 418                 return add_preferred_console("ttyS", serial_console - 1, NULL);
 419
 420         return -ENODEV;
 421 }
 422 console_initcall(set_preferred_console);
 423
 424 /* BUFFER is PAGE_SIZE bytes long. */
 425
 426 extern char *sparc_cpu_type;
 427 extern char *sparc_fpu_type;
 428
 429 extern void smp_info(struct seq_file *);
 430 extern void smp_bogo(struct seq_file *);
 431 extern void mmu_info(struct seq_file *);
 432
 433 unsigned int dcache_parity_tl1_occurred;
 434 unsigned int icache_parity_tl1_occurred;
 435
 436 static int ncpus_probed;
 437
 438 static int show_cpuinfo(struct seq_file *m, void *__unused)
 439 {
 440         seq_printf(m,
 441                    "cpu\t\t: %s\n"
 442                    "fpu\t\t: %s\n"
 443                    "prom\t\t: %s\n"
 444                    "type\t\t: %s\n"
 445                    "ncpus probed\t: %d\n"
 446                    "ncpus active\t: %d\n"
 447                    "D$ parity tl1\t: %u\n"
 448                    "I$ parity tl1\t: %u\n"
 449 #ifndef CONFIG_SMP
 450                    "Cpu0Bogo\t: %lu.%02lu\n"
 451                    "Cpu0ClkTck\t: %016lx\n"
 452 #endif
 453                    ,
 454                    sparc_cpu_type,
 455                    sparc_fpu_type,
 456                    prom_version,
 457                    ((tlb_type == hypervisor) ?
 458                     "sun4v" :
 459                     "sun4u"),
 460                    ncpus_probed,
 461                    num_online_cpus(),
 462                    dcache_parity_tl1_occurred,
 463                    icache_parity_tl1_occurred
 464 #ifndef CONFIG_SMP
 465                    , cpu_data(0).udelay_val/(500000/HZ),
 466                    (cpu_data(0).udelay_val/(5000/HZ)) % 100,
 467                    cpu_data(0).clock_tick
 468 #endif
 469                 );
 470 #ifdef CONFIG_SMP
 471         smp_bogo(m);
 472 #endif
 473         mmu_info(m);
 474 #ifdef CONFIG_SMP
 475         smp_info(m);
 476 #endif
 477         return 0;
 478 }
 479
 480 static void *c_start(struct seq_file *m, loff_t *pos)
 481 {
 482         /* The pointer we are returning is arbitrary,
 483          * it just has to be non-NULL and not IS_ERR
 484          * in the success case.
 485          */
 486         return *pos == 0 ? &c_start : NULL;
 487 }
 488
 489 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 490 {
 491         ++*pos;
 492         return c_start(m, pos);
 493 }
 494
 495 static void c_stop(struct seq_file *m, void *v)
 496 {
 497 }
 498
 499 struct seq_operations cpuinfo_op = {
 500         .start =c_start,
 501         .next = c_next,
 502         .stop = c_stop,
 503         .show = show_cpuinfo,
 504 };
 505
 506 extern int stop_a_enabled;
 507
 508 void sun_do_break(void)
 509 {
 510         if (!stop_a_enabled)
 511                 return;
 512
 513         prom_printf("\n");
 514         flush_user_windows();
 515
 516         prom_cmdline();
 517 }
 518
 519 int serial_console = -1;
 520 int stop_a_enabled = 1;
 521
 522 static int __init topology_init(void)
 523 {
 524         int i, err;
 525
 526         err = -ENOMEM;
 527
 528         /* Count the number of physically present processors in
 529          * the machine, even on uniprocessor, so that /proc/cpuinfo
 530          * output is consistent with 2.4.x
 531          */
 532         ncpus_probed = 0;
 533         while (!cpu_find_by_instance(ncpus_probed, NULL, NULL))
 534                 ncpus_probed++;
 535
 536         for_each_possible_cpu(i) {
 537                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
 538                 if (p) {
 539                         register_cpu(p, i);
 540                         err = 0;
 541                 }
 542         }
 543
 544         return err;
 545 }
 546
 547 subsys_initcall(topology_init);