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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 #include <asm/ns87303.h>
  50
  51 #ifdef CONFIG_IP_PNP
  52 #include <net/ipconfig.h>
  53 #endif
  54
  55 /* Used to synchronize accesses to NatSemi SUPER I/O chip configure
  56  * operations in asm/ns87303.h
  57  */
  58 DEFINE_SPINLOCK(ns87303_lock);
  59
  60 struct screen_info screen_info = {
  61         0, 0,                   /* orig-x, orig-y */
  62         0,                      /* unused */
  63         0,                      /* orig-video-page */
  64         0,                      /* orig-video-mode */
  65         128,                    /* orig-video-cols */
  66         0, 0, 0,                /* unused, ega_bx, unused */
  67         54,                     /* orig-video-lines */
  68         0,                      /* orig-video-isVGA */
  69         16                      /* orig-video-points */
  70 };
  71
  72 void (*prom_palette)(int);
  73 void (*prom_keyboard)(void);
  74
  75 static void
  76 prom_console_write(struct console *con, const char *s, unsigned n)
  77 {
  78         prom_write(s, n);
  79 }
  80
  81 unsigned int boot_flags = 0;
  82 #define BOOTME_DEBUG  0x1
  83
  84 /* Exported for mm/init.c:paging_init. */
  85 unsigned long cmdline_memory_size = 0;
  86
  87 static struct console prom_debug_console = {
  88         .name =         "debug",
  89         .write =        prom_console_write,
  90         .flags =        CON_PRINTBUFFER,
  91         .index =        -1,
  92 };
  93
  94 /* XXX Implement this at some point... */
  95 void kernel_enter_debugger(void)
  96 {
  97 }
  98
  99 /*
 100  * Process kernel command line switches that are specific to the
 101  * SPARC or that require special low-level processing.
 102  */
 103 static void __init process_switch(char c)
 104 {
 105         switch (c) {
 106         case 'd':
 107                 boot_flags |= BOOTME_DEBUG;
 108                 break;
 109         case 's':
 110                 break;
 111         case 'h':
 112                 prom_printf("boot_flags_init: Halt!\n");
 113                 prom_halt();
 114                 break;
 115         case 'p':
 116                 /* Use PROM debug console. */
 117                 register_console(&prom_debug_console);
 118                 break;
 119         case 'P':
 120                 /* Force UltraSPARC-III P-Cache on. */
 121                 if (tlb_type != cheetah) {
 122                         printk("BOOT: Ignoring P-Cache force option.\n");
 123                         break;
 124                 }
 125                 cheetah_pcache_forced_on = 1;
 126                 add_taint(TAINT_MACHINE_CHECK);
 127                 cheetah_enable_pcache();
 128                 break;
 129
 130         default:
 131                 printk("Unknown boot switch (-%c)\n", c);
 132                 break;
 133         }
 134 }
 135
 136 static void __init process_console(char *commands)
 137 {
 138         serial_console = 0;
 139         commands += 8;
 140         /* Linux-style serial */
 141         if (!strncmp(commands, "ttyS", 4))
 142                 serial_console = simple_strtoul(commands + 4, NULL, 10) + 1;
 143         else if (!strncmp(commands, "tty", 3)) {
 144                 char c = *(commands + 3);
 145                 /* Solaris-style serial */
 146                 if (c == 'a' || c == 'b') {
 147                         serial_console = c - 'a' + 1;
 148                         prom_printf ("Using /dev/tty%c as console.\n", c);
 149                 }
 150                 /* else Linux-style fbcon, not serial */
 151         }
 152 #if defined(CONFIG_PROM_CONSOLE)
 153         if (!strncmp(commands, "prom", 4)) {
 154                 char *p;
 155
 156                 for (p = commands - 8; *p && *p != ' '; p++)
 157                         *p = ' ';
 158                 conswitchp = &prom_con;
 159         }
 160 #endif
 161 }
 162
 163 static void __init boot_flags_init(char *commands)
 164 {
 165         while (*commands) {
 166                 /* Move to the start of the next "argument". */
 167                 while (*commands && *commands == ' ')
 168                         commands++;
 169
 170                 /* Process any command switches, otherwise skip it. */
 171                 if (*commands == '\0')
 172                         break;
 173                 if (*commands == '-') {
 174                         commands++;
 175                         while (*commands && *commands != ' ')
 176                                 process_switch(*commands++);
 177                         continue;
 178                 }
 179                 if (!strncmp(commands, "console=", 8)) {
 180                         process_console(commands);
 181                 } else if (!strncmp(commands, "mem=", 4)) {
 182                         /*
 183                          * "mem=XXX[kKmM]" overrides the PROM-reported
 184                          * memory size.
 185                          */
 186                         cmdline_memory_size = simple_strtoul(commands + 4,
 187                                                              &commands, 0);
 188                         if (*commands == 'K' || *commands == 'k') {
 189                                 cmdline_memory_size <<= 10;
 190                                 commands++;
 191                         } else if (*commands=='M' || *commands=='m') {
 192                                 cmdline_memory_size <<= 20;
 193                                 commands++;
 194                         }
 195                 }
 196                 while (*commands && *commands != ' ')
 197                         commands++;
 198         }
 199 }
 200
 201 extern void panic_setup(char *, int *);
 202
 203 extern unsigned short root_flags;
 204 extern unsigned short root_dev;
 205 extern unsigned short ram_flags;
 206 #define RAMDISK_IMAGE_START_MASK        0x07FF
 207 #define RAMDISK_PROMPT_FLAG             0x8000
 208 #define RAMDISK_LOAD_FLAG               0x4000
 209
 210 extern int root_mountflags;
 211
 212 char reboot_command[COMMAND_LINE_SIZE];
 213
 214 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
 215
 216 void __init per_cpu_patch(void)
 217 {
 218         struct cpuid_patch_entry *p;
 219         unsigned long ver;
 220         int is_jbus;
 221
 222         if (tlb_type == spitfire && !this_is_starfire)
 223                 return;
 224
 225         is_jbus = 0;
 226         if (tlb_type != hypervisor) {
 227                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
 228                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
 229                            (ver >> 32UL) == __SERRANO_ID);
 230         }
 231
 232         p = &__cpuid_patch;
 233         while (p < &__cpuid_patch_end) {
 234                 unsigned long addr = p->addr;
 235                 unsigned int *insns;
 236
 237                 switch (tlb_type) {
 238                 case spitfire:
 239                         insns = &p->starfire[0];
 240                         break;
 241                 case cheetah:
 242                 case cheetah_plus:
 243                         if (is_jbus)
 244                                 insns = &p->cheetah_jbus[0];
 245                         else
 246                                 insns = &p->cheetah_safari[0];
 247                         break;
 248                 case hypervisor:
 249                         insns = &p->sun4v[0];
 250                         break;
 251                 default:
 252                         prom_printf("Unknown cpu type, halting.\n");
 253                         prom_halt();
 254                 };
 255
 256                 *(unsigned int *) (addr +  0) = insns[0];
 257                 wmb();
 258                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 259
 260                 *(unsigned int *) (addr +  4) = insns[1];
 261                 wmb();
 262                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 263
 264                 *(unsigned int *) (addr +  8) = insns[2];
 265                 wmb();
 266                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
 267
 268                 *(unsigned int *) (addr + 12) = insns[3];
 269                 wmb();
 270                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
 271
 272                 p++;
 273         }
 274 }
 275
 276 void __init sun4v_patch(void)
 277 {
 278         extern void sun4v_hvapi_init(void);
 279         struct sun4v_1insn_patch_entry *p1;
 280         struct sun4v_2insn_patch_entry *p2;
 281
 282         if (tlb_type != hypervisor)
 283                 return;
 284
 285         p1 = &__sun4v_1insn_patch;
 286         while (p1 < &__sun4v_1insn_patch_end) {
 287                 unsigned long addr = p1->addr;
 288
 289                 *(unsigned int *) (addr +  0) = p1->insn;
 290                 wmb();
 291                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 292
 293                 p1++;
 294         }
 295
 296         p2 = &__sun4v_2insn_patch;
 297         while (p2 < &__sun4v_2insn_patch_end) {
 298                 unsigned long addr = p2->addr;
 299
 300                 *(unsigned int *) (addr +  0) = p2->insns[0];
 301                 wmb();
 302                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 303
 304                 *(unsigned int *) (addr +  4) = p2->insns[1];
 305                 wmb();
 306                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 307
 308                 p2++;
 309         }
 310
 311         sun4v_hvapi_init();
 312 }
 313
 314 #ifdef CONFIG_SMP
 315 void __init boot_cpu_id_too_large(int cpu)
 316 {
 317         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
 318                     cpu, NR_CPUS);
 319         prom_halt();
 320 }
 321 #endif
 322
 323 void __init setup_arch(char **cmdline_p)
 324 {
 325         /* Initialize PROM console and command line. */
 326         *cmdline_p = prom_getbootargs();
 327         strcpy(boot_command_line, *cmdline_p);
 328
 329         if (tlb_type == hypervisor)
 330                 printk("ARCH: SUN4V\n");
 331         else
 332                 printk("ARCH: SUN4U\n");
 333
 334 #ifdef CONFIG_DUMMY_CONSOLE
 335         conswitchp = &dummy_con;
 336 #elif defined(CONFIG_PROM_CONSOLE)
 337         conswitchp = &prom_con;
 338 #endif
 339
 340         boot_flags_init(*cmdline_p);
 341
 342         idprom_init();
 343
 344         if (!root_flags)
 345                 root_mountflags &= ~MS_RDONLY;
 346         ROOT_DEV = old_decode_dev(root_dev);
 347 #ifdef CONFIG_BLK_DEV_RAM
 348         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
 349         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
 350         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
 351 #endif
 352
 353         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
 354
 355 #ifdef CONFIG_IP_PNP
 356         if (!ic_set_manually) {
 357                 int chosen = prom_finddevice ("/chosen");
 358                 u32 cl, sv, gw;
 359
 360                 cl = prom_getintdefault (chosen, "client-ip", 0);
 361                 sv = prom_getintdefault (chosen, "server-ip", 0);
 362                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
 363                 if (cl && sv) {
 364                         ic_myaddr = cl;
 365                         ic_servaddr = sv;
 366                         if (gw)
 367                                 ic_gateway = gw;
 368 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
 369                         ic_proto_enabled = 0;
 370 #endif
 371                 }
 372         }
 373 #endif
 374
 375         /* Get boot processor trap_block[] setup.  */
 376         init_cur_cpu_trap(current_thread_info());
 377
 378         paging_init();
 379 }
 380
 381 static int __init set_preferred_console(void)
 382 {
 383         int idev, odev;
 384
 385         /* The user has requested a console so this is already set up. */
 386         if (serial_console >= 0)
 387                 return -EBUSY;
 388
 389         idev = prom_query_input_device();
 390         odev = prom_query_output_device();
 391         if (idev == PROMDEV_IKBD && odev == PROMDEV_OSCREEN) {
 392                 serial_console = 0;
 393         } else if (idev == PROMDEV_ITTYA && odev == PROMDEV_OTTYA) {
 394                 serial_console = 1;
 395         } else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
 396                 serial_console = 2;
 397         } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) {
 398                 serial_console = 3;
 399         } else if (idev == PROMDEV_IVCONS && odev == PROMDEV_OVCONS) {
 400                 /* sunhv_console_init() doesn't check the serial_console
 401                  * value anyways...
 402                  */
 403                 serial_console = 4;
 404                 return add_preferred_console("ttyHV", 0, NULL);
 405         } else {
 406                 prom_printf("Inconsistent console: "
 407                             "input %d, output %d\n",
 408                             idev, odev);
 409                 prom_halt();
 410         }
 411
 412         if (serial_console)
 413                 return add_preferred_console("ttyS", serial_console - 1, NULL);
 414
 415         return -ENODEV;
 416 }
 417 console_initcall(set_preferred_console);
 418
 419 /* BUFFER is PAGE_SIZE bytes long. */
 420
 421 extern char *sparc_cpu_type;
 422 extern char *sparc_fpu_type;
 423
 424 extern void smp_info(struct seq_file *);
 425 extern void smp_bogo(struct seq_file *);
 426 extern void mmu_info(struct seq_file *);
 427
 428 unsigned int dcache_parity_tl1_occurred;
 429 unsigned int icache_parity_tl1_occurred;
 430
 431 int ncpus_probed;
 432
 433 static int show_cpuinfo(struct seq_file *m, void *__unused)
 434 {
 435         seq_printf(m,
 436                    "cpu\t\t: %s\n"
 437                    "fpu\t\t: %s\n"
 438                    "prom\t\t: %s\n"
 439                    "type\t\t: %s\n"
 440                    "ncpus probed\t: %d\n"
 441                    "ncpus active\t: %d\n"
 442                    "D$ parity tl1\t: %u\n"
 443                    "I$ parity tl1\t: %u\n"
 444 #ifndef CONFIG_SMP
 445                    "Cpu0Bogo\t: %lu.%02lu\n"
 446                    "Cpu0ClkTck\t: %016lx\n"
 447 #endif
 448                    ,
 449                    sparc_cpu_type,
 450                    sparc_fpu_type,
 451                    prom_version,
 452                    ((tlb_type == hypervisor) ?
 453                     "sun4v" :
 454                     "sun4u"),
 455                    ncpus_probed,
 456                    num_online_cpus(),
 457                    dcache_parity_tl1_occurred,
 458                    icache_parity_tl1_occurred
 459 #ifndef CONFIG_SMP
 460                    , cpu_data(0).udelay_val/(500000/HZ),
 461                    (cpu_data(0).udelay_val/(5000/HZ)) % 100,
 462                    cpu_data(0).clock_tick
 463 #endif
 464                 );
 465 #ifdef CONFIG_SMP
 466         smp_bogo(m);
 467 #endif
 468         mmu_info(m);
 469 #ifdef CONFIG_SMP
 470         smp_info(m);
 471 #endif
 472         return 0;
 473 }
 474
 475 static void *c_start(struct seq_file *m, loff_t *pos)
 476 {
 477         /* The pointer we are returning is arbitrary,
 478          * it just has to be non-NULL and not IS_ERR
 479          * in the success case.
 480          */
 481         return *pos == 0 ? &c_start : NULL;
 482 }
 483
 484 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 485 {
 486         ++*pos;
 487         return c_start(m, pos);
 488 }
 489
 490 static void c_stop(struct seq_file *m, void *v)
 491 {
 492 }
 493
 494 struct seq_operations cpuinfo_op = {
 495         .start =c_start,
 496         .next = c_next,
 497         .stop = c_stop,
 498         .show = show_cpuinfo,
 499 };
 500
 501 extern int stop_a_enabled;
 502
 503 void sun_do_break(void)
 504 {
 505         if (!stop_a_enabled)
 506                 return;
 507
 508         prom_printf("\n");
 509         flush_user_windows();
 510
 511         prom_cmdline();
 512 }
 513
 514 int serial_console = -1;
 515 int stop_a_enabled = 1;