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