arch/sparc/kernel/setup_64.c

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