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