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