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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/tty.h>
  20 #include <linux/delay.h>
  21 #include <linux/config.h>
  22 #include <linux/fs.h>
  23 #include <linux/seq_file.h>
  24 #include <linux/syscalls.h>
  25 #include <linux/kdev_t.h>
  26 #include <linux/major.h>
  27 #include <linux/string.h>
  28 #include <linux/init.h>
  29 #include <linux/inet.h>
  30 #include <linux/console.h>
  31 #include <linux/root_dev.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/cpu.h>
  34 #include <linux/initrd.h>
  35
  36 #include <asm/system.h>
  37 #include <asm/io.h>
  38 #include <asm/processor.h>
  39 #include <asm/oplib.h>
  40 #include <asm/page.h>
  41 #include <asm/pgtable.h>
  42 #include <asm/idprom.h>
  43 #include <asm/head.h>
  44 #include <asm/starfire.h>
  45 #include <asm/mmu_context.h>
  46 #include <asm/timer.h>
  47 #include <asm/sections.h>
  48 #include <asm/setup.h>
  49 #include <asm/mmu.h>
  50
  51 #ifdef CONFIG_IP_PNP
  52 #include <net/ipconfig.h>
  53 #endif
  54
  55 struct screen_info screen_info = {
  56         0, 0,                   /* orig-x, orig-y */
  57         0,                      /* unused */
  58         0,                      /* orig-video-page */
  59         0,                      /* orig-video-mode */
  60         128,                    /* orig-video-cols */
  61         0, 0, 0,                /* unused, ega_bx, unused */
  62         54,                     /* orig-video-lines */
  63         0,                      /* orig-video-isVGA */
  64         16                      /* orig-video-points */
  65 };
  66
  67 void (*prom_palette)(int);
  68 void (*prom_keyboard)(void);
  69
  70 static void
  71 prom_console_write(struct console *con, const char *s, unsigned n)
  72 {
  73         prom_write(s, n);
  74 }
  75
  76 unsigned int boot_flags = 0;
  77 #define BOOTME_DEBUG  0x1
  78 #define BOOTME_SINGLE 0x2
  79
  80 /* Exported for mm/init.c:paging_init. */
  81 unsigned long cmdline_memory_size = 0;
  82
  83 static struct console prom_debug_console = {
  84         .name =         "debug",
  85         .write =        prom_console_write,
  86         .flags =        CON_PRINTBUFFER,
  87         .index =        -1,
  88 };
  89
  90 /* XXX Implement this at some point... */
  91 void kernel_enter_debugger(void)
  92 {
  93 }
  94
  95 int obp_system_intr(void)
  96 {
  97         if (boot_flags & BOOTME_DEBUG) {
  98                 printk("OBP: system interrupted\n");
  99                 prom_halt();
 100                 return 1;
 101         }
 102         return 0;
 103 }
 104
 105 /*
 106  * Process kernel command line switches that are specific to the
 107  * SPARC or that require special low-level processing.
 108  */
 109 static void __init process_switch(char c)
 110 {
 111         switch (c) {
 112         case 'd':
 113                 boot_flags |= BOOTME_DEBUG;
 114                 break;
 115         case 's':
 116                 boot_flags |= BOOTME_SINGLE;
 117                 break;
 118         case 'h':
 119                 prom_printf("boot_flags_init: Halt!\n");
 120                 prom_halt();
 121                 break;
 122         case 'p':
 123                 /* Use PROM debug console. */
 124                 register_console(&prom_debug_console);
 125                 break;
 126         case 'P':
 127                 /* Force UltraSPARC-III P-Cache on. */
 128                 if (tlb_type != cheetah) {
 129                         printk("BOOT: Ignoring P-Cache force option.\n");
 130                         break;
 131                 }
 132                 cheetah_pcache_forced_on = 1;
 133                 add_taint(TAINT_MACHINE_CHECK);
 134                 cheetah_enable_pcache();
 135                 break;
 136
 137         default:
 138                 printk("Unknown boot switch (-%c)\n", c);
 139                 break;
 140         }
 141 }
 142
 143 static void __init process_console(char *commands)
 144 {
 145         serial_console = 0;
 146         commands += 8;
 147         /* Linux-style serial */
 148         if (!strncmp(commands, "ttyS", 4))
 149                 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
 150         else if (!strncmp(commands, "tty", 3)) {
 151                 char c = *(commands + 3);
 152                 /* Solaris-style serial */
 153                 if (c == 'a' || c == 'b') {
 154                         serial_console = c - 'a' + 1;
 155                         prom_printf ("Using /dev/tty%c as console.\n", c);
 156                 }
 157                 /* else Linux-style fbcon, not serial */
 158         }
 159 #if defined(CONFIG_PROM_CONSOLE)
 160         if (!strncmp(commands, "prom", 4)) {
 161                 char *p;
 162
 163                 for (p = commands - 8; *p && *p != ' '; p++)
 164                         *p = ' ';
 165                 conswitchp = &prom_con;
 166         }
 167 #endif
 168 }
 169
 170 static void __init boot_flags_init(char *commands)
 171 {
 172         while (*commands) {
 173                 /* Move to the start of the next "argument". */
 174                 while (*commands && *commands == ' ')
 175                         commands++;
 176
 177                 /* Process any command switches, otherwise skip it. */
 178                 if (*commands == '\0')
 179                         break;
 180                 if (*commands == '-') {
 181                         commands++;
 182                         while (*commands && *commands != ' ')
 183                                 process_switch(*commands++);
 184                         continue;
 185                 }
 186                 if (!strncmp(commands, "console=", 8)) {
 187                         process_console(commands);
 188                 } else if (!strncmp(commands, "mem=", 4)) {
 189                         /*
 190                          * "mem=XXX[kKmM]" overrides the PROM-reported
 191                          * memory size.
 192                          */
 193                         cmdline_memory_size = simple_strtoul(commands + 4,
 194                                                              &commands, 0);
 195                         if (*commands == 'K' || *commands == 'k') {
 196                                 cmdline_memory_size <<= 10;
 197                                 commands++;
 198                         } else if (*commands=='M' || *commands=='m') {
 199                                 cmdline_memory_size <<= 20;
 200                                 commands++;
 201                         }
 202                 }
 203                 while (*commands && *commands != ' ')
 204                         commands++;
 205         }
 206 }
 207
 208 extern void panic_setup(char *, int *);
 209
 210 extern unsigned short root_flags;
 211 extern unsigned short root_dev;
 212 extern unsigned short ram_flags;
 213 #define RAMDISK_IMAGE_START_MASK        0x07FF
 214 #define RAMDISK_PROMPT_FLAG             0x8000
 215 #define RAMDISK_LOAD_FLAG               0x4000
 216
 217 extern int root_mountflags;
 218
 219 char reboot_command[COMMAND_LINE_SIZE];
 220
 221 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
 222
 223 static void __init per_cpu_patch(void)
 224 {
 225 #ifdef CONFIG_SMP
 226         struct cpuid_patch_entry *p;
 227         unsigned long ver;
 228         int is_jbus;
 229
 230         if (tlb_type == spitfire && !this_is_starfire)
 231                 return;
 232
 233         is_jbus = 0;
 234         if (tlb_type != hypervisor) {
 235                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
 236                 is_jbus = ((ver >> 32) == __JALAPENO_ID ||
 237                            (ver >> 32) == __SERRANO_ID);
 238         }
 239
 240         p = &__cpuid_patch;
 241         while (p < &__cpuid_patch_end) {
 242                 unsigned long addr = p->addr;
 243                 unsigned int *insns;
 244
 245                 switch (tlb_type) {
 246                 case spitfire:
 247                         insns = &p->starfire[0];
 248                         break;
 249                 case cheetah:
 250                 case cheetah_plus:
 251                         if (is_jbus)
 252                                 insns = &p->cheetah_jbus[0];
 253                         else
 254                                 insns = &p->cheetah_safari[0];
 255                         break;
 256                 case hypervisor:
 257                         insns = &p->sun4v[0];
 258                         break;
 259                 default:
 260                         prom_printf("Unknown cpu type, halting.\n");
 261                         prom_halt();
 262                 };
 263
 264                 *(unsigned int *) (addr +  0) = insns[0];
 265                 wmb();
 266                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 267
 268                 *(unsigned int *) (addr +  4) = insns[1];
 269                 wmb();
 270                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 271
 272                 *(unsigned int *) (addr +  8) = insns[2];
 273                 wmb();
 274                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
 275
 276                 *(unsigned int *) (addr + 12) = insns[3];
 277                 wmb();
 278                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
 279
 280                 p++;
 281         }
 282 #endif
 283 }
 284
 285 static void __init sun4v_patch(void)
 286 {
 287         struct sun4v_1insn_patch_entry *p1;
 288         struct sun4v_2insn_patch_entry *p2;
 289
 290         if (tlb_type != hypervisor)
 291                 return;
 292
 293         p1 = &__sun4v_1insn_patch;
 294         while (p1 < &__sun4v_1insn_patch_end) {
 295                 unsigned long addr = p1->addr;
 296
 297                 *(unsigned int *) (addr +  0) = p1->insn;
 298                 wmb();
 299                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 300
 301                 p1++;
 302         }
 303
 304         p2 = &__sun4v_2insn_patch;
 305         while (p2 < &__sun4v_2insn_patch_end) {
 306                 unsigned long addr = p2->addr;
 307
 308                 *(unsigned int *) (addr +  0) = p2->insns[0];
 309                 wmb();
 310                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 311
 312                 *(unsigned int *) (addr +  4) = p2->insns[1];
 313                 wmb();
 314                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 315
 316                 p2++;
 317         }
 318 }
 319
 320 void __init setup_arch(char **cmdline_p)
 321 {
 322         /* Initialize PROM console and command line. */
 323         *cmdline_p = prom_getbootargs();
 324         strcpy(saved_command_line, *cmdline_p);
 325
 326         if (tlb_type == hypervisor)
 327                 printk("ARCH: SUN4V\n");
 328         else
 329                 printk("ARCH: SUN4U\n");
 330
 331 #ifdef CONFIG_DUMMY_CONSOLE
 332         conswitchp = &dummy_con;
 333 #elif defined(CONFIG_PROM_CONSOLE)
 334         conswitchp = &prom_con;
 335 #endif
 336
 337         /* Work out if we are starfire early on */
 338         check_if_starfire();
 339
 340         /* Now we know enough to patch the get_cpuid sequences
 341          * used by trap code.
 342          */
 343         per_cpu_patch();
 344
 345         sun4v_patch();
 346
 347         boot_flags_init(*cmdline_p);
 348
 349         idprom_init();
 350
 351         if (!root_flags)
 352                 root_mountflags &= ~MS_RDONLY;
 353         ROOT_DEV = old_decode_dev(root_dev);
 354 #ifdef CONFIG_BLK_DEV_INITRD
 355         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
 356         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
 357         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
 358 #endif
 359
 360         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
 361
 362 #ifdef CONFIG_IP_PNP
 363         if (!ic_set_manually) {
 364                 int chosen = prom_finddevice ("/chosen");
 365                 u32 cl, sv, gw;
 366
 367                 cl = prom_getintdefault (chosen, "client-ip", 0);
 368                 sv = prom_getintdefault (chosen, "server-ip", 0);
 369                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
 370                 if (cl && sv) {
 371                         ic_myaddr = cl;
 372                         ic_servaddr = sv;
 373                         if (gw)
 374                                 ic_gateway = gw;
 375 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
 376                         ic_proto_enabled = 0;
 377 #endif
 378                 }
 379         }
 380 #endif
 381
 382         smp_setup_cpu_possible_map();
 383
 384         paging_init();
 385
 386         /* Get boot processor trap_block[] setup.  */
 387         init_cur_cpu_trap();
 388 }
 389
 390 static int __init set_preferred_console(void)
 391 {
 392         int idev, odev;
 393
 394         /* The user has requested a console so this is already set up. */
 395         if (serial_console >= 0)
 396                 return -EBUSY;
 397
 398         idev = prom_query_input_device();
 399         odev = prom_query_output_device();
 400         if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
 401                 serial_console = 0;
 402         } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
 403                 serial_console = 1;
 404         } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
 405                 serial_console = 2;
 406         } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) {
 407                 serial_console = 3;
 408         } else {
 409                 prom_printf("Inconsistent console: "
 410                             "input %d, output %d\n",
 411                             idev, odev);
 412                 prom_halt();
 413         }
 414
 415         if (serial_console)
 416                 return add_preferred_console("ttyS", serial_console - 1, NULL);
 417
 418         return -ENODEV;
 419 }
 420 console_initcall(set_preferred_console);
 421
 422 /* BUFFER is PAGE_SIZE bytes long. */
 423
 424 extern char *sparc_cpu_type;
 425 extern char *sparc_fpu_type;
 426
 427 extern void smp_info(struct seq_file *);
 428 extern void smp_bogo(struct seq_file *);
 429 extern void mmu_info(struct seq_file *);
 430
 431 unsigned int dcache_parity_tl1_occurred;
 432 unsigned int icache_parity_tl1_occurred;
 433
 434 static int ncpus_probed;
 435
 436 static int show_cpuinfo(struct seq_file *m, void *__unused)
 437 {
 438         seq_printf(m,
 439                    "cpu\t\t: %s\n"
 440                    "fpu\t\t: %s\n"
 441                    "promlib\t\t: Version 3 Revision %d\n"
 442                    "prom\t\t: %d.%d.%d\n"
 443                    "type\t\t: sun4u\n"
 444                    "ncpus probed\t: %d\n"
 445                    "ncpus active\t: %d\n"
 446                    "D$ parity tl1\t: %u\n"
 447                    "I$ parity tl1\t: %u\n"
 448 #ifndef CONFIG_SMP
 449                    "Cpu0Bogo\t: %lu.%02lu\n"
 450                    "Cpu0ClkTck\t: %016lx\n"
 451 #endif
 452                    ,
 453                    sparc_cpu_type,
 454                    sparc_fpu_type,
 455                    prom_rev,
 456                    prom_prev >> 16,
 457                    (prom_prev >> 8) & 0xff,
 458                    prom_prev & 0xff,
 459                    ncpus_probed,
 460                    num_online_cpus(),
 461                    dcache_parity_tl1_occurred,
 462                    icache_parity_tl1_occurred
 463 #ifndef CONFIG_SMP
 464                    , cpu_data(0).udelay_val/(500000/HZ),
 465                    (cpu_data(0).udelay_val/(5000/HZ)) % 100,
 466                    cpu_data(0).clock_tick
 467 #endif
 468                 );
 469 #ifdef CONFIG_SMP
 470         smp_bogo(m);
 471 #endif
 472         mmu_info(m);
 473 #ifdef CONFIG_SMP
 474         smp_info(m);
 475 #endif
 476         return 0;
 477 }
 478
 479 static void *c_start(struct seq_file *m, loff_t *pos)
 480 {
 481         /* The pointer we are returning is arbitrary,
 482          * it just has to be non-NULL and not IS_ERR
 483          * in the success case.
 484          */
 485         return *pos == 0 ? &c_start : NULL;
 486 }
 487
 488 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 489 {
 490         ++*pos;
 491         return c_start(m, pos);
 492 }
 493
 494 static void c_stop(struct seq_file *m, void *v)
 495 {
 496 }
 497
 498 struct seq_operations cpuinfo_op = {
 499         .start =c_start,
 500         .next = c_next,
 501         .stop = c_stop,
 502         .show = show_cpuinfo,
 503 };
 504
 505 extern int stop_a_enabled;
 506
 507 void sun_do_break(void)
 508 {
 509         if (!stop_a_enabled)
 510                 return;
 511
 512         prom_printf("\n");
 513         flush_user_windows();
 514
 515         prom_cmdline();
 516 }
 517
 518 int serial_console = -1;
 519 int stop_a_enabled = 1;
 520
 521 static int __init topology_init(void)
 522 {
 523         int i, err;
 524
 525         err = -ENOMEM;
 526
 527         /* Count the number of physically present processors in
 528          * the machine, even on uniprocessor, so that /proc/cpuinfo
 529          * output is consistent with 2.4.x
 530          */
 531         ncpus_probed = 0;
 532         while (!cpu_find_by_instance(ncpus_probed, NULL, NULL))
 533                 ncpus_probed++;
 534
 535         for (i = 0; i < NR_CPUS; i++) {
 536                 if (cpu_possible(i)) {
 537                         struct cpu *p = kmalloc(sizeof(*p), GFP_KERNEL);
 538
 539                         if (p) {
 540                                 memset(p, 0, sizeof(*p));
 541                                 register_cpu(p, i, NULL);
 542                                 err = 0;
 543                         }
 544                 }
 545         }
 546
 547         return err;
 548 }
 549
 550 subsys_initcall(topology_init);