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/screen_info.h>
  19 #include <linux/delay.h>
  20 #include <linux/fs.h>
  21 #include <linux/seq_file.h>
  22 #include <linux/syscalls.h>
  23 #include <linux/kdev_t.h>
  24 #include <linux/major.h>
  25 #include <linux/string.h>
  26 #include <linux/init.h>
  27 #include <linux/inet.h>
  28 #include <linux/console.h>
  29 #include <linux/root_dev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/cpu.h>
  32 #include <linux/initrd.h>
  33
  34 #include <asm/system.h>
  35 #include <asm/io.h>
  36 #include <asm/processor.h>
  37 #include <asm/oplib.h>
  38 #include <asm/page.h>
  39 #include <asm/pgtable.h>
  40 #include <asm/idprom.h>
  41 #include <asm/head.h>
  42 #include <asm/starfire.h>
  43 #include <asm/mmu_context.h>
  44 #include <asm/timer.h>
  45 #include <asm/sections.h>
  46 #include <asm/setup.h>
  47 #include <asm/mmu.h>
  48 #include <asm/ns87303.h>
  49
  50 #ifdef CONFIG_IP_PNP
  51 #include <net/ipconfig.h>
  52 #endif
  53
  54 /* Used to synchronize accesses to NatSemi SUPER I/O chip configure
  55  * operations in asm/ns87303.h
  56  */
  57 DEFINE_SPINLOCK(ns87303_lock);
  58
  59 struct screen_info screen_info = {
  60         0, 0,                   /* orig-x, orig-y */
  61         0,                      /* unused */
  62         0,                      /* orig-video-page */
  63         0,                      /* orig-video-mode */
  64         128,                    /* orig-video-cols */
  65         0, 0, 0,                /* unused, ega_bx, unused */
  66         54,                     /* orig-video-lines */
  67         0,                      /* orig-video-isVGA */
  68         16                      /* orig-video-points */
  69 };
  70
  71 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
  72 void (*prom_palette)(int);
  73 void (*prom_keyboard)(void);
  74
  75 =======
  76 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
  77 static void
  78 prom_console_write(struct console *con, const char *s, unsigned n)
  79 {
  80         prom_write(s, n);
  81 }
  82
  83 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
  84 unsigned int boot_flags = 0;
  85 #define BOOTME_DEBUG  0x1
  86
  87 =======
  88 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
  89 /* Exported for mm/init.c:paging_init. */
  90 unsigned long cmdline_memory_size = 0;
  91
  92 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
  93 static struct console prom_debug_console = {
  94         .name =         "debug",
  95 =======
  96 static struct console prom_early_console = {
  97         .name =         "earlyprom",
  98 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
  99         .write =        prom_console_write,
 100 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
 101         .flags =        CON_PRINTBUFFER,
 102 =======
 103         .flags =        CON_PRINTBUFFER | CON_BOOT,
 104 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
 105         .index =        -1,
 106 };
 107
 108 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
 109 /* XXX Implement this at some point... */
 110 void kernel_enter_debugger(void)
 111 {
 112 }
 113
 114 =======
 115 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
 116 /*
 117  * Process kernel command line switches that are specific to the
 118  * SPARC or that require special low-level processing.
 119  */
 120 static void __init process_switch(char c)
 121 {
 122         switch (c) {
 123         case 'd':
 124 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
 125                 boot_flags |= BOOTME_DEBUG;
 126                 break;
 127 =======
 128 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
 129         case 's':
 130                 break;
 131         case 'h':
 132                 prom_printf("boot_flags_init: Halt!\n");
 133                 prom_halt();
 134                 break;
 135         case 'p':
 136 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
 137                 /* Use PROM debug console. */
 138                 register_console(&prom_debug_console);
 139 =======
 140                 /* Just ignore, this behavior is now the default.  */
 141 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
 142                 break;
 143         case 'P':
 144                 /* Force UltraSPARC-III P-Cache on. */
 145                 if (tlb_type != cheetah) {
 146                         printk("BOOT: Ignoring P-Cache force option.\n");
 147                         break;
 148                 }
 149                 cheetah_pcache_forced_on = 1;
 150                 add_taint(TAINT_MACHINE_CHECK);
 151                 cheetah_enable_pcache();
 152                 break;
 153
 154         default:
 155                 printk("Unknown boot switch (-%c)\n", c);
 156                 break;
 157         }
 158 }
 159
 160 static void __init boot_flags_init(char *commands)
 161 {
 162         while (*commands) {
 163                 /* Move to the start of the next "argument". */
 164                 while (*commands && *commands == ' ')
 165                         commands++;
 166
 167                 /* Process any command switches, otherwise skip it. */
 168                 if (*commands == '\0')
 169                         break;
 170                 if (*commands == '-') {
 171                         commands++;
 172                         while (*commands && *commands != ' ')
 173                                 process_switch(*commands++);
 174                         continue;
 175                 }
 176                 if (!strncmp(commands, "mem=", 4)) {
 177                         /*
 178                          * "mem=XXX[kKmM]" overrides the PROM-reported
 179                          * memory size.
 180                          */
 181                         cmdline_memory_size = simple_strtoul(commands + 4,
 182                                                              &commands, 0);
 183                         if (*commands == 'K' || *commands == 'k') {
 184                                 cmdline_memory_size <<= 10;
 185                                 commands++;
 186                         } else if (*commands=='M' || *commands=='m') {
 187                                 cmdline_memory_size <<= 20;
 188                                 commands++;
 189                         }
 190                 }
 191                 while (*commands && *commands != ' ')
 192                         commands++;
 193         }
 194 }
 195
 196 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
 197 extern void panic_setup(char *, int *);
 198
 199 =======
 200 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
 201 extern unsigned short root_flags;
 202 extern unsigned short root_dev;
 203 extern unsigned short ram_flags;
 204 #define RAMDISK_IMAGE_START_MASK        0x07FF
 205 #define RAMDISK_PROMPT_FLAG             0x8000
 206 #define RAMDISK_LOAD_FLAG               0x4000
 207
 208 extern int root_mountflags;
 209
 210 char reboot_command[COMMAND_LINE_SIZE];
 211
 212 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
 213
 214 void __init per_cpu_patch(void)
 215 {
 216         struct cpuid_patch_entry *p;
 217         unsigned long ver;
 218         int is_jbus;
 219
 220         if (tlb_type == spitfire && !this_is_starfire)
 221                 return;
 222
 223         is_jbus = 0;
 224         if (tlb_type != hypervisor) {
 225                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
 226                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
 227                            (ver >> 32UL) == __SERRANO_ID);
 228         }
 229
 230         p = &__cpuid_patch;
 231         while (p < &__cpuid_patch_end) {
 232                 unsigned long addr = p->addr;
 233                 unsigned int *insns;
 234
 235                 switch (tlb_type) {
 236                 case spitfire:
 237                         insns = &p->starfire[0];
 238                         break;
 239                 case cheetah:
 240                 case cheetah_plus:
 241                         if (is_jbus)
 242                                 insns = &p->cheetah_jbus[0];
 243                         else
 244                                 insns = &p->cheetah_safari[0];
 245                         break;
 246                 case hypervisor:
 247                         insns = &p->sun4v[0];
 248                         break;
 249                 default:
 250                         prom_printf("Unknown cpu type, halting.\n");
 251                         prom_halt();
 252                 };
 253
 254                 *(unsigned int *) (addr +  0) = insns[0];
 255                 wmb();
 256                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 257
 258                 *(unsigned int *) (addr +  4) = insns[1];
 259                 wmb();
 260                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 261
 262                 *(unsigned int *) (addr +  8) = insns[2];
 263                 wmb();
 264                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
 265
 266                 *(unsigned int *) (addr + 12) = insns[3];
 267                 wmb();
 268                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
 269
 270                 p++;
 271         }
 272 }
 273
 274 void __init sun4v_patch(void)
 275 {
 276         extern void sun4v_hvapi_init(void);
 277         struct sun4v_1insn_patch_entry *p1;
 278         struct sun4v_2insn_patch_entry *p2;
 279
 280         if (tlb_type != hypervisor)
 281                 return;
 282
 283         p1 = &__sun4v_1insn_patch;
 284         while (p1 < &__sun4v_1insn_patch_end) {
 285                 unsigned long addr = p1->addr;
 286
 287                 *(unsigned int *) (addr +  0) = p1->insn;
 288                 wmb();
 289                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 290
 291                 p1++;
 292         }
 293
 294         p2 = &__sun4v_2insn_patch;
 295         while (p2 < &__sun4v_2insn_patch_end) {
 296                 unsigned long addr = p2->addr;
 297
 298                 *(unsigned int *) (addr +  0) = p2->insns[0];
 299                 wmb();
 300                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 301
 302                 *(unsigned int *) (addr +  4) = p2->insns[1];
 303                 wmb();
 304                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 305
 306                 p2++;
 307         }
 308
 309         sun4v_hvapi_init();
 310 }
 311
 312 #ifdef CONFIG_SMP
 313 void __init boot_cpu_id_too_large(int cpu)
 314 {
 315         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
 316                     cpu, NR_CPUS);
 317         prom_halt();
 318 }
 319 #endif
 320
 321 void __init setup_arch(char **cmdline_p)
 322 {
 323         /* Initialize PROM console and command line. */
 324         *cmdline_p = prom_getbootargs();
 325         strcpy(boot_command_line, *cmdline_p);
 326
 327 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
 328 =======
 329         boot_flags_init(*cmdline_p);
 330         register_console(&prom_early_console);
 331
 332 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
 333         if (tlb_type == hypervisor)
 334                 printk("ARCH: SUN4V\n");
 335         else
 336                 printk("ARCH: SUN4U\n");
 337
 338 #ifdef CONFIG_DUMMY_CONSOLE
 339         conswitchp = &dummy_con;
 340 #elif defined(CONFIG_PROM_CONSOLE)
 341         conswitchp = &prom_con;
 342 #endif
 343
 344 <<<<<<< HEAD:arch/sparc64/kernel/setup.c
 345         boot_flags_init(*cmdline_p);
 346
 347 =======
 348 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sparc64/kernel/setup.c
 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_RAM
 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         /* Get boot processor trap_block[] setup.  */
 383         init_cur_cpu_trap(current_thread_info());
 384
 385         paging_init();
 386 }
 387
 388 /* BUFFER is PAGE_SIZE bytes long. */
 389
 390 extern char *sparc_cpu_type;
 391 extern char *sparc_fpu_type;
 392
 393 extern void smp_info(struct seq_file *);
 394 extern void smp_bogo(struct seq_file *);
 395 extern void mmu_info(struct seq_file *);
 396
 397 unsigned int dcache_parity_tl1_occurred;
 398 unsigned int icache_parity_tl1_occurred;
 399
 400 int ncpus_probed;
 401
 402 static int show_cpuinfo(struct seq_file *m, void *__unused)
 403 {
 404         seq_printf(m,
 405                    "cpu\t\t: %s\n"
 406                    "fpu\t\t: %s\n"
 407                    "prom\t\t: %s\n"
 408                    "type\t\t: %s\n"
 409                    "ncpus probed\t: %d\n"
 410                    "ncpus active\t: %d\n"
 411                    "D$ parity tl1\t: %u\n"
 412                    "I$ parity tl1\t: %u\n"
 413 #ifndef CONFIG_SMP
 414                    "Cpu0ClkTck\t: %016lx\n"
 415 #endif
 416                    ,
 417                    sparc_cpu_type,
 418                    sparc_fpu_type,
 419                    prom_version,
 420                    ((tlb_type == hypervisor) ?
 421                     "sun4v" :
 422                     "sun4u"),
 423                    ncpus_probed,
 424                    num_online_cpus(),
 425                    dcache_parity_tl1_occurred,
 426                    icache_parity_tl1_occurred
 427 #ifndef CONFIG_SMP
 428                    , cpu_data(0).clock_tick
 429 #endif
 430                 );
 431 #ifdef CONFIG_SMP
 432         smp_bogo(m);
 433 #endif
 434         mmu_info(m);
 435 #ifdef CONFIG_SMP
 436         smp_info(m);
 437 #endif
 438         return 0;
 439 }
 440
 441 static void *c_start(struct seq_file *m, loff_t *pos)
 442 {
 443         /* The pointer we are returning is arbitrary,
 444          * it just has to be non-NULL and not IS_ERR
 445          * in the success case.
 446          */
 447         return *pos == 0 ? &c_start : NULL;
 448 }
 449
 450 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 451 {
 452         ++*pos;
 453         return c_start(m, pos);
 454 }
 455
 456 static void c_stop(struct seq_file *m, void *v)
 457 {
 458 }
 459
 460 const struct seq_operations cpuinfo_op = {
 461         .start =c_start,
 462         .next = c_next,
 463         .stop = c_stop,
 464         .show = show_cpuinfo,
 465 };
 466
 467 extern int stop_a_enabled;
 468
 469 void sun_do_break(void)
 470 {
 471         if (!stop_a_enabled)
 472                 return;
 473
 474         prom_printf("\n");
 475         flush_user_windows();
 476
 477         prom_cmdline();
 478 }
 479
 480 int stop_a_enabled = 1;