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