arch/sparc64/kernel/setup.c

   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         extern void sun4v_hvapi_init(void);
 273         struct sun4v_1insn_patch_entry *p1;
 274         struct sun4v_2insn_patch_entry *p2;
 275
 276         if (tlb_type != hypervisor)
 277                 return;
 278
 279         p1 = &__sun4v_1insn_patch;
 280         while (p1 < &__sun4v_1insn_patch_end) {
 281                 unsigned long addr = p1->addr;
 282
 283                 *(unsigned int *) (addr +  0) = p1->insn;
 284                 wmb();
 285                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 286
 287                 p1++;
 288         }
 289
 290         p2 = &__sun4v_2insn_patch;
 291         while (p2 < &__sun4v_2insn_patch_end) {
 292                 unsigned long addr = p2->addr;
 293
 294                 *(unsigned int *) (addr +  0) = p2->insns[0];
 295                 wmb();
 296                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 297
 298                 *(unsigned int *) (addr +  4) = p2->insns[1];
 299                 wmb();
 300                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 301
 302                 p2++;
 303         }
 304
 305         sun4v_hvapi_init();
 306 }
 307
 308 #ifdef CONFIG_SMP
 309 void __init boot_cpu_id_too_large(int cpu)
 310 {
 311         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
 312                     cpu, NR_CPUS);
 313         prom_halt();
 314 }
 315 #endif
 316
 317 void __init setup_arch(char **cmdline_p)
 318 {
 319         /* Initialize PROM console and command line. */
 320         *cmdline_p = prom_getbootargs();
 321         strcpy(boot_command_line, *cmdline_p);
 322
 323         if (tlb_type == hypervisor)
 324                 printk("ARCH: SUN4V\n");
 325         else
 326                 printk("ARCH: SUN4U\n");
 327
 328 #ifdef CONFIG_DUMMY_CONSOLE
 329         conswitchp = &dummy_con;
 330 #elif defined(CONFIG_PROM_CONSOLE)
 331         conswitchp = &prom_con;
 332 #endif
 333
 334         boot_flags_init(*cmdline_p);
 335
 336         idprom_init();
 337
 338         if (!root_flags)
 339                 root_mountflags &= ~MS_RDONLY;
 340         ROOT_DEV = old_decode_dev(root_dev);
 341 #ifdef CONFIG_BLK_DEV_RAM
 342         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
 343         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
 344         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
 345 #endif
 346
 347         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
 348
 349 #ifdef CONFIG_IP_PNP
 350         if (!ic_set_manually) {
 351                 int chosen = prom_finddevice ("/chosen");
 352                 u32 cl, sv, gw;
 353
 354                 cl = prom_getintdefault (chosen, "client-ip", 0);
 355                 sv = prom_getintdefault (chosen, "server-ip", 0);
 356                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
 357                 if (cl && sv) {
 358                         ic_myaddr = cl;
 359                         ic_servaddr = sv;
 360                         if (gw)
 361                                 ic_gateway = gw;
 362 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
 363                         ic_proto_enabled = 0;
 364 #endif
 365                 }
 366         }
 367 #endif
 368
 369         /* Get boot processor trap_block[] setup.  */
 370         init_cur_cpu_trap(current_thread_info());
 371
 372         paging_init();
 373
 374         smp_setup_cpu_possible_map();
 375 }
 376
 377 static int __init set_preferred_console(void)
 378 {
 379         int idev, odev;
 380
 381         /* The user has requested a console so this is already set up. */
 382         if (serial_console >= 0)
 383                 return -EBUSY;
 384
 385         idev = prom_query_input_device();
 386         odev = prom_query_output_device();
 387         if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
 388                 serial_console = 0;
 389         } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
 390                 serial_console = 1;
 391         } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
 392                 serial_console = 2;
 393         } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) {
 394                 serial_console = 3;
 395         } else if (idev == PROMDEV_IVCONS && odev == PROMDEV_OVCONS) {
 396                 /* sunhv_console_init() doesn't check the serial_console
 397                  * value anyways...
 398                  */
 399                 serial_console = 4;
 400                 return add_preferred_console("ttyHV", 0, NULL);
 401         } else {
 402                 prom_printf("Inconsistent console: "
 403                             "input %d, output %d\n",
 404                             idev, odev);
 405                 prom_halt();
 406         }
 407
 408         if (serial_console)
 409                 return add_preferred_console("ttyS", serial_console - 1, NULL);
 410
 411         return -ENODEV;
 412 }
 413 console_initcall(set_preferred_console);
 414
 415 /* BUFFER is PAGE_SIZE bytes long. */
 416
 417 extern char *sparc_cpu_type;
 418 extern char *sparc_fpu_type;
 419
 420 extern void smp_info(struct seq_file *);
 421 extern void smp_bogo(struct seq_file *);
 422 extern void mmu_info(struct seq_file *);
 423
 424 unsigned int dcache_parity_tl1_occurred;
 425 unsigned int icache_parity_tl1_occurred;
 426
 427 static int ncpus_probed;
 428
 429 static int show_cpuinfo(struct seq_file *m, void *__unused)
 430 {
 431         seq_printf(m,
 432                    "cpu\t\t: %s\n"
 433                    "fpu\t\t: %s\n"
 434                    "prom\t\t: %s\n"
 435                    "type\t\t: %s\n"
 436                    "ncpus probed\t: %d\n"
 437                    "ncpus active\t: %d\n"
 438                    "D$ parity tl1\t: %u\n"
 439                    "I$ parity tl1\t: %u\n"
 440 #ifndef CONFIG_SMP
 441                    "Cpu0Bogo\t: %lu.%02lu\n"
 442                    "Cpu0ClkTck\t: %016lx\n"
 443 #endif
 444                    ,
 445                    sparc_cpu_type,
 446                    sparc_fpu_type,
 447                    prom_version,
 448                    ((tlb_type == hypervisor) ?
 449                     "sun4v" :
 450                     "sun4u"),
 451                    ncpus_probed,
 452                    num_online_cpus(),
 453                    dcache_parity_tl1_occurred,
 454                    icache_parity_tl1_occurred
 455 #ifndef CONFIG_SMP
 456                    , cpu_data(0).udelay_val/(500000/HZ),
 457                    (cpu_data(0).udelay_val/(5000/HZ)) % 100,
 458                    cpu_data(0).clock_tick
 459 #endif
 460                 );
 461 #ifdef CONFIG_SMP
 462         smp_bogo(m);
 463 #endif
 464         mmu_info(m);
 465 #ifdef CONFIG_SMP
 466         smp_info(m);
 467 #endif
 468         return 0;
 469 }
 470
 471 static void *c_start(struct seq_file *m, loff_t *pos)
 472 {
 473         /* The pointer we are returning is arbitrary,
 474          * it just has to be non-NULL and not IS_ERR
 475          * in the success case.
 476          */
 477         return *pos == 0 ? &c_start : NULL;
 478 }
 479
 480 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 481 {
 482         ++*pos;
 483         return c_start(m, pos);
 484 }
 485
 486 static void c_stop(struct seq_file *m, void *v)
 487 {
 488 }
 489
 490 struct seq_operations cpuinfo_op = {
 491         .start =c_start,
 492         .next = c_next,
 493         .stop = c_stop,
 494         .show = show_cpuinfo,
 495 };
 496
 497 extern int stop_a_enabled;
 498
 499 void sun_do_break(void)
 500 {
 501         if (!stop_a_enabled)
 502                 return;
 503
 504         prom_printf("\n");
 505         flush_user_windows();
 506
 507         prom_cmdline();
 508 }
 509
 510 int serial_console = -1;
 511 int stop_a_enabled = 1;
 512
 513 static int __init topology_init(void)
 514 {
 515         int i, err;
 516
 517         err = -ENOMEM;
 518
 519         /* Count the number of physically present processors in
 520          * the machine, even on uniprocessor, so that /proc/cpuinfo
 521          * output is consistent with 2.4.x
 522          */
 523         ncpus_probed = 0;
 524         while (!cpu_find_by_instance(ncpus_probed, NULL, NULL))
 525                 ncpus_probed++;
 526
 527         for_each_possible_cpu(i) {
 528                 struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
 529                 if (p) {
 530                         register_cpu(p, i);
 531                         err = 0;
 532                 }
 533         }
 534
 535         return err;
 536 }
 537
 538 subsys_initcall(topology_init);