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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 void (*prom_palette)(int);
  72 void (*prom_keyboard)(void);
  73
  74 static void
  75 prom_console_write(struct console *con, const char *s, unsigned n)
  76 {
  77         prom_write(s, n);
  78 }
  79
  80 unsigned int boot_flags = 0;
  81 #define BOOTME_DEBUG  0x1
  82
  83 /* Exported for mm/init.c:paging_init. */
  84 unsigned long cmdline_memory_size = 0;
  85
  86 static struct console prom_debug_console = {
  87         .name =         "debug",
  88         .write =        prom_console_write,
  89         .flags =        CON_PRINTBUFFER,
  90         .index =        -1,
  91 };
  92
  93 /* XXX Implement this at some point... */
  94 void kernel_enter_debugger(void)
  95 {
  96 }
  97
  98 /*
  99  * Process kernel command line switches that are specific to the
 100  * SPARC or that require special low-level processing.
 101  */
 102 static void __init process_switch(char c)
 103 {
 104         switch (c) {
 105         case 'd':
 106                 boot_flags |= BOOTME_DEBUG;
 107                 break;
 108         case 's':
 109                 break;
 110         case 'h':
 111                 prom_printf("boot_flags_init: Halt!\n");
 112                 prom_halt();
 113                 break;
 114         case 'p':
 115                 /* Use PROM debug console. */
 116                 register_console(&prom_debug_console);
 117                 break;
 118         case 'P':
 119                 /* Force UltraSPARC-III P-Cache on. */
 120                 if (tlb_type != cheetah) {
 121                         printk("BOOT: Ignoring P-Cache force option.\n");
 122                         break;
 123                 }
 124                 cheetah_pcache_forced_on = 1;
 125                 add_taint(TAINT_MACHINE_CHECK);
 126                 cheetah_enable_pcache();
 127                 break;
 128
 129         default:
 130                 printk("Unknown boot switch (-%c)\n", c);
 131                 break;
 132         }
 133 }
 134
 135 static void __init boot_flags_init(char *commands)
 136 {
 137         while (*commands) {
 138                 /* Move to the start of the next "argument". */
 139                 while (*commands && *commands == ' ')
 140                         commands++;
 141
 142                 /* Process any command switches, otherwise skip it. */
 143                 if (*commands == '\0')
 144                         break;
 145                 if (*commands == '-') {
 146                         commands++;
 147                         while (*commands && *commands != ' ')
 148                                 process_switch(*commands++);
 149                         continue;
 150                 }
 151                 if (!strncmp(commands, "mem=", 4)) {
 152                         /*
 153                          * "mem=XXX[kKmM]" overrides the PROM-reported
 154                          * memory size.
 155                          */
 156                         cmdline_memory_size = simple_strtoul(commands + 4,
 157                                                              &commands, 0);
 158                         if (*commands == 'K' || *commands == 'k') {
 159                                 cmdline_memory_size <<= 10;
 160                                 commands++;
 161                         } else if (*commands=='M' || *commands=='m') {
 162                                 cmdline_memory_size <<= 20;
 163                                 commands++;
 164                         }
 165                 }
 166                 while (*commands && *commands != ' ')
 167                         commands++;
 168         }
 169 }
 170
 171 extern void panic_setup(char *, int *);
 172
 173 extern unsigned short root_flags;
 174 extern unsigned short root_dev;
 175 extern unsigned short ram_flags;
 176 #define RAMDISK_IMAGE_START_MASK        0x07FF
 177 #define RAMDISK_PROMPT_FLAG             0x8000
 178 #define RAMDISK_LOAD_FLAG               0x4000
 179
 180 extern int root_mountflags;
 181
 182 char reboot_command[COMMAND_LINE_SIZE];
 183
 184 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
 185
 186 void __init per_cpu_patch(void)
 187 {
 188         struct cpuid_patch_entry *p;
 189         unsigned long ver;
 190         int is_jbus;
 191
 192         if (tlb_type == spitfire && !this_is_starfire)
 193                 return;
 194
 195         is_jbus = 0;
 196         if (tlb_type != hypervisor) {
 197                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
 198                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
 199                            (ver >> 32UL) == __SERRANO_ID);
 200         }
 201
 202         p = &__cpuid_patch;
 203         while (p < &__cpuid_patch_end) {
 204                 unsigned long addr = p->addr;
 205                 unsigned int *insns;
 206
 207                 switch (tlb_type) {
 208                 case spitfire:
 209                         insns = &p->starfire[0];
 210                         break;
 211                 case cheetah:
 212                 case cheetah_plus:
 213                         if (is_jbus)
 214                                 insns = &p->cheetah_jbus[0];
 215                         else
 216                                 insns = &p->cheetah_safari[0];
 217                         break;
 218                 case hypervisor:
 219                         insns = &p->sun4v[0];
 220                         break;
 221                 default:
 222                         prom_printf("Unknown cpu type, halting.\n");
 223                         prom_halt();
 224                 };
 225
 226                 *(unsigned int *) (addr +  0) = insns[0];
 227                 wmb();
 228                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 229
 230                 *(unsigned int *) (addr +  4) = insns[1];
 231                 wmb();
 232                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 233
 234                 *(unsigned int *) (addr +  8) = insns[2];
 235                 wmb();
 236                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
 237
 238                 *(unsigned int *) (addr + 12) = insns[3];
 239                 wmb();
 240                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
 241
 242                 p++;
 243         }
 244 }
 245
 246 void __init sun4v_patch(void)
 247 {
 248         extern void sun4v_hvapi_init(void);
 249         struct sun4v_1insn_patch_entry *p1;
 250         struct sun4v_2insn_patch_entry *p2;
 251
 252         if (tlb_type != hypervisor)
 253                 return;
 254
 255         p1 = &__sun4v_1insn_patch;
 256         while (p1 < &__sun4v_1insn_patch_end) {
 257                 unsigned long addr = p1->addr;
 258
 259                 *(unsigned int *) (addr +  0) = p1->insn;
 260                 wmb();
 261                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 262
 263                 p1++;
 264         }
 265
 266         p2 = &__sun4v_2insn_patch;
 267         while (p2 < &__sun4v_2insn_patch_end) {
 268                 unsigned long addr = p2->addr;
 269
 270                 *(unsigned int *) (addr +  0) = p2->insns[0];
 271                 wmb();
 272                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 273
 274                 *(unsigned int *) (addr +  4) = p2->insns[1];
 275                 wmb();
 276                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 277
 278                 p2++;
 279         }
 280
 281         sun4v_hvapi_init();
 282 }
 283
 284 #ifdef CONFIG_SMP
 285 void __init boot_cpu_id_too_large(int cpu)
 286 {
 287         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
 288                     cpu, NR_CPUS);
 289         prom_halt();
 290 }
 291 #endif
 292
 293 void __init setup_arch(char **cmdline_p)
 294 {
 295         /* Initialize PROM console and command line. */
 296         *cmdline_p = prom_getbootargs();
 297         strcpy(boot_command_line, *cmdline_p);
 298
 299         if (tlb_type == hypervisor)
 300                 printk("ARCH: SUN4V\n");
 301         else
 302                 printk("ARCH: SUN4U\n");
 303
 304 #ifdef CONFIG_DUMMY_CONSOLE
 305         conswitchp = &dummy_con;
 306 #elif defined(CONFIG_PROM_CONSOLE)
 307         conswitchp = &prom_con;
 308 #endif
 309
 310         boot_flags_init(*cmdline_p);
 311
 312         idprom_init();
 313
 314         if (!root_flags)
 315                 root_mountflags &= ~MS_RDONLY;
 316         ROOT_DEV = old_decode_dev(root_dev);
 317 #ifdef CONFIG_BLK_DEV_RAM
 318         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
 319         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
 320         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
 321 #endif
 322
 323         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
 324
 325 #ifdef CONFIG_IP_PNP
 326         if (!ic_set_manually) {
 327                 int chosen = prom_finddevice ("/chosen");
 328                 u32 cl, sv, gw;
 329
 330                 cl = prom_getintdefault (chosen, "client-ip", 0);
 331                 sv = prom_getintdefault (chosen, "server-ip", 0);
 332                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
 333                 if (cl && sv) {
 334                         ic_myaddr = cl;
 335                         ic_servaddr = sv;
 336                         if (gw)
 337                                 ic_gateway = gw;
 338 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
 339                         ic_proto_enabled = 0;
 340 #endif
 341                 }
 342         }
 343 #endif
 344
 345         /* Get boot processor trap_block[] setup.  */
 346         init_cur_cpu_trap(current_thread_info());
 347
 348         paging_init();
 349 }
 350
 351 /* BUFFER is PAGE_SIZE bytes long. */
 352
 353 extern char *sparc_cpu_type;
 354 extern char *sparc_fpu_type;
 355
 356 extern void smp_info(struct seq_file *);
 357 extern void smp_bogo(struct seq_file *);
 358 extern void mmu_info(struct seq_file *);
 359
 360 unsigned int dcache_parity_tl1_occurred;
 361 unsigned int icache_parity_tl1_occurred;
 362
 363 int ncpus_probed;
 364
 365 static int show_cpuinfo(struct seq_file *m, void *__unused)
 366 {
 367         seq_printf(m,
 368                    "cpu\t\t: %s\n"
 369                    "fpu\t\t: %s\n"
 370                    "prom\t\t: %s\n"
 371                    "type\t\t: %s\n"
 372                    "ncpus probed\t: %d\n"
 373                    "ncpus active\t: %d\n"
 374                    "D$ parity tl1\t: %u\n"
 375                    "I$ parity tl1\t: %u\n"
 376 #ifndef CONFIG_SMP
 377                    "Cpu0ClkTck\t: %016lx\n"
 378 #endif
 379                    ,
 380                    sparc_cpu_type,
 381                    sparc_fpu_type,
 382                    prom_version,
 383                    ((tlb_type == hypervisor) ?
 384                     "sun4v" :
 385                     "sun4u"),
 386                    ncpus_probed,
 387                    num_online_cpus(),
 388                    dcache_parity_tl1_occurred,
 389                    icache_parity_tl1_occurred
 390 #ifndef CONFIG_SMP
 391                    , cpu_data(0).clock_tick
 392 #endif
 393                 );
 394 #ifdef CONFIG_SMP
 395         smp_bogo(m);
 396 #endif
 397         mmu_info(m);
 398 #ifdef CONFIG_SMP
 399         smp_info(m);
 400 #endif
 401         return 0;
 402 }
 403
 404 static void *c_start(struct seq_file *m, loff_t *pos)
 405 {
 406         /* The pointer we are returning is arbitrary,
 407          * it just has to be non-NULL and not IS_ERR
 408          * in the success case.
 409          */
 410         return *pos == 0 ? &c_start : NULL;
 411 }
 412
 413 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 414 {
 415         ++*pos;
 416         return c_start(m, pos);
 417 }
 418
 419 static void c_stop(struct seq_file *m, void *v)
 420 {
 421 }
 422
 423 const struct seq_operations cpuinfo_op = {
 424         .start =c_start,
 425         .next = c_next,
 426         .stop = c_stop,
 427         .show = show_cpuinfo,
 428 };
 429
 430 extern int stop_a_enabled;
 431
 432 void sun_do_break(void)
 433 {
 434         if (!stop_a_enabled)
 435                 return;
 436
 437         prom_printf("\n");
 438         flush_user_windows();
 439
 440         prom_cmdline();
 441 }
 442
 443 int stop_a_enabled = 1;