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/a.out.h>
  19 #include <linux/screen_info.h>
  20 #include <linux/delay.h>
  21 #include <linux/fs.h>
  22 #include <linux/seq_file.h>
  23 #include <linux/syscalls.h>
  24 #include <linux/kdev_t.h>
  25 #include <linux/major.h>
  26 #include <linux/string.h>
  27 #include <linux/init.h>
  28 #include <linux/inet.h>
  29 #include <linux/console.h>
  30 #include <linux/root_dev.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/cpu.h>
  33 #include <linux/initrd.h>
  34
  35 #include <asm/system.h>
  36 #include <asm/io.h>
  37 #include <asm/processor.h>
  38 #include <asm/oplib.h>
  39 #include <asm/page.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/idprom.h>
  42 #include <asm/head.h>
  43 #include <asm/starfire.h>
  44 #include <asm/mmu_context.h>
  45 #include <asm/timer.h>
  46 #include <asm/sections.h>
  47 #include <asm/setup.h>
  48 #include <asm/mmu.h>
  49 #include <asm/ns87303.h>
  50
  51 #ifdef CONFIG_IP_PNP
  52 #include <net/ipconfig.h>
  53 #endif
  54
  55 /* Used to synchronize accesses to NatSemi SUPER I/O chip configure
  56  * operations in asm/ns87303.h
  57  */
  58 DEFINE_SPINLOCK(ns87303_lock);
  59
  60 struct screen_info screen_info = {
  61         0, 0,                   /* orig-x, orig-y */
  62         0,                      /* unused */
  63         0,                      /* orig-video-page */
  64         0,                      /* orig-video-mode */
  65         128,                    /* orig-video-cols */
  66         0, 0, 0,                /* unused, ega_bx, unused */
  67         54,                     /* orig-video-lines */
  68         0,                      /* orig-video-isVGA */
  69         16                      /* orig-video-points */
  70 };
  71
  72 void (*prom_palette)(int);
  73 void (*prom_keyboard)(void);
  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 unsigned int boot_flags = 0;
  82 #define BOOTME_DEBUG  0x1
  83
  84 /* Exported for mm/init.c:paging_init. */
  85 unsigned long cmdline_memory_size = 0;
  86
  87 static struct console prom_debug_console = {
  88         .name =         "debug",
  89         .write =        prom_console_write,
  90         .flags =        CON_PRINTBUFFER,
  91         .index =        -1,
  92 };
  93
  94 /* XXX Implement this at some point... */
  95 void kernel_enter_debugger(void)
  96 {
  97 }
  98
  99 /*
 100  * Process kernel command line switches that are specific to the
 101  * SPARC or that require special low-level processing.
 102  */
 103 static void __init process_switch(char c)
 104 {
 105         switch (c) {
 106         case 'd':
 107                 boot_flags |= BOOTME_DEBUG;
 108                 break;
 109         case 's':
 110                 break;
 111         case 'h':
 112                 prom_printf("boot_flags_init: Halt!\n");
 113                 prom_halt();
 114                 break;
 115         case 'p':
 116                 /* Use PROM debug console. */
 117                 register_console(&prom_debug_console);
 118                 break;
 119         case 'P':
 120                 /* Force UltraSPARC-III P-Cache on. */
 121                 if (tlb_type != cheetah) {
 122                         printk("BOOT: Ignoring P-Cache force option.\n");
 123                         break;
 124                 }
 125                 cheetah_pcache_forced_on = 1;
 126                 add_taint(TAINT_MACHINE_CHECK);
 127                 cheetah_enable_pcache();
 128                 break;
 129
 130         default:
 131                 printk("Unknown boot switch (-%c)\n", c);
 132                 break;
 133         }
 134 }
 135
 136 static void __init boot_flags_init(char *commands)
 137 {
 138         while (*commands) {
 139                 /* Move to the start of the next "argument". */
 140                 while (*commands && *commands == ' ')
 141                         commands++;
 142
 143                 /* Process any command switches, otherwise skip it. */
 144                 if (*commands == '\0')
 145                         break;
 146                 if (*commands == '-') {
 147                         commands++;
 148                         while (*commands && *commands != ' ')
 149                                 process_switch(*commands++);
 150                         continue;
 151                 }
 152                 if (!strncmp(commands, "mem=", 4)) {
 153                         /*
 154                          * "mem=XXX[kKmM]" overrides the PROM-reported
 155                          * memory size.
 156                          */
 157                         cmdline_memory_size = simple_strtoul(commands + 4,
 158                                                              &commands, 0);
 159                         if (*commands == 'K' || *commands == 'k') {
 160                                 cmdline_memory_size <<= 10;
 161                                 commands++;
 162                         } else if (*commands=='M' || *commands=='m') {
 163                                 cmdline_memory_size <<= 20;
 164                                 commands++;
 165                         }
 166                 }
 167                 while (*commands && *commands != ' ')
 168                         commands++;
 169         }
 170 }
 171
 172 extern void panic_setup(char *, int *);
 173
 174 extern unsigned short root_flags;
 175 extern unsigned short root_dev;
 176 extern unsigned short ram_flags;
 177 #define RAMDISK_IMAGE_START_MASK        0x07FF
 178 #define RAMDISK_PROMPT_FLAG             0x8000
 179 #define RAMDISK_LOAD_FLAG               0x4000
 180
 181 extern int root_mountflags;
 182
 183 char reboot_command[COMMAND_LINE_SIZE];
 184
 185 static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 };
 186
 187 void __init per_cpu_patch(void)
 188 {
 189         struct cpuid_patch_entry *p;
 190         unsigned long ver;
 191         int is_jbus;
 192
 193         if (tlb_type == spitfire && !this_is_starfire)
 194                 return;
 195
 196         is_jbus = 0;
 197         if (tlb_type != hypervisor) {
 198                 __asm__ ("rdpr %%ver, %0" : "=r" (ver));
 199                 is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||
 200                            (ver >> 32UL) == __SERRANO_ID);
 201         }
 202
 203         p = &__cpuid_patch;
 204         while (p < &__cpuid_patch_end) {
 205                 unsigned long addr = p->addr;
 206                 unsigned int *insns;
 207
 208                 switch (tlb_type) {
 209                 case spitfire:
 210                         insns = &p->starfire[0];
 211                         break;
 212                 case cheetah:
 213                 case cheetah_plus:
 214                         if (is_jbus)
 215                                 insns = &p->cheetah_jbus[0];
 216                         else
 217                                 insns = &p->cheetah_safari[0];
 218                         break;
 219                 case hypervisor:
 220                         insns = &p->sun4v[0];
 221                         break;
 222                 default:
 223                         prom_printf("Unknown cpu type, halting.\n");
 224                         prom_halt();
 225                 };
 226
 227                 *(unsigned int *) (addr +  0) = insns[0];
 228                 wmb();
 229                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 230
 231                 *(unsigned int *) (addr +  4) = insns[1];
 232                 wmb();
 233                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 234
 235                 *(unsigned int *) (addr +  8) = insns[2];
 236                 wmb();
 237                 __asm__ __volatile__("flush     %0" : : "r" (addr +  8));
 238
 239                 *(unsigned int *) (addr + 12) = insns[3];
 240                 wmb();
 241                 __asm__ __volatile__("flush     %0" : : "r" (addr + 12));
 242
 243                 p++;
 244         }
 245 }
 246
 247 void __init sun4v_patch(void)
 248 {
 249         extern void sun4v_hvapi_init(void);
 250         struct sun4v_1insn_patch_entry *p1;
 251         struct sun4v_2insn_patch_entry *p2;
 252
 253         if (tlb_type != hypervisor)
 254                 return;
 255
 256         p1 = &__sun4v_1insn_patch;
 257         while (p1 < &__sun4v_1insn_patch_end) {
 258                 unsigned long addr = p1->addr;
 259
 260                 *(unsigned int *) (addr +  0) = p1->insn;
 261                 wmb();
 262                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 263
 264                 p1++;
 265         }
 266
 267         p2 = &__sun4v_2insn_patch;
 268         while (p2 < &__sun4v_2insn_patch_end) {
 269                 unsigned long addr = p2->addr;
 270
 271                 *(unsigned int *) (addr +  0) = p2->insns[0];
 272                 wmb();
 273                 __asm__ __volatile__("flush     %0" : : "r" (addr +  0));
 274
 275                 *(unsigned int *) (addr +  4) = p2->insns[1];
 276                 wmb();
 277                 __asm__ __volatile__("flush     %0" : : "r" (addr +  4));
 278
 279                 p2++;
 280         }
 281
 282         sun4v_hvapi_init();
 283 }
 284
 285 #ifdef CONFIG_SMP
 286 void __init boot_cpu_id_too_large(int cpu)
 287 {
 288         prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",
 289                     cpu, NR_CPUS);
 290         prom_halt();
 291 }
 292 #endif
 293
 294 void __init setup_arch(char **cmdline_p)
 295 {
 296         /* Initialize PROM console and command line. */
 297         *cmdline_p = prom_getbootargs();
 298         strcpy(boot_command_line, *cmdline_p);
 299
 300         if (tlb_type == hypervisor)
 301                 printk("ARCH: SUN4V\n");
 302         else
 303                 printk("ARCH: SUN4U\n");
 304
 305 #ifdef CONFIG_DUMMY_CONSOLE
 306         conswitchp = &dummy_con;
 307 #elif defined(CONFIG_PROM_CONSOLE)
 308         conswitchp = &prom_con;
 309 #endif
 310
 311         boot_flags_init(*cmdline_p);
 312
 313         idprom_init();
 314
 315         if (!root_flags)
 316                 root_mountflags &= ~MS_RDONLY;
 317         ROOT_DEV = old_decode_dev(root_dev);
 318 #ifdef CONFIG_BLK_DEV_RAM
 319         rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK;
 320         rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0);
 321         rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0);
 322 #endif
 323
 324         task_thread_info(&init_task)->kregs = &fake_swapper_regs;
 325
 326 #ifdef CONFIG_IP_PNP
 327         if (!ic_set_manually) {
 328                 int chosen = prom_finddevice ("/chosen");
 329                 u32 cl, sv, gw;
 330
 331                 cl = prom_getintdefault (chosen, "client-ip", 0);
 332                 sv = prom_getintdefault (chosen, "server-ip", 0);
 333                 gw = prom_getintdefault (chosen, "gateway-ip", 0);
 334                 if (cl && sv) {
 335                         ic_myaddr = cl;
 336                         ic_servaddr = sv;
 337                         if (gw)
 338                                 ic_gateway = gw;
 339 #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_RARP)
 340                         ic_proto_enabled = 0;
 341 #endif
 342                 }
 343         }
 344 #endif
 345
 346         /* Get boot processor trap_block[] setup.  */
 347         init_cur_cpu_trap(current_thread_info());
 348
 349         paging_init();
 350 }
 351
 352 /* BUFFER is PAGE_SIZE bytes long. */
 353
 354 extern char *sparc_cpu_type;
 355 extern char *sparc_fpu_type;
 356
 357 extern void smp_info(struct seq_file *);
 358 extern void smp_bogo(struct seq_file *);
 359 extern void mmu_info(struct seq_file *);
 360
 361 unsigned int dcache_parity_tl1_occurred;
 362 unsigned int icache_parity_tl1_occurred;
 363
 364 int ncpus_probed;
 365
 366 static int show_cpuinfo(struct seq_file *m, void *__unused)
 367 {
 368         seq_printf(m,
 369                    "cpu\t\t: %s\n"
 370                    "fpu\t\t: %s\n"
 371                    "prom\t\t: %s\n"
 372                    "type\t\t: %s\n"
 373                    "ncpus probed\t: %d\n"
 374                    "ncpus active\t: %d\n"
 375                    "D$ parity tl1\t: %u\n"
 376                    "I$ parity tl1\t: %u\n"
 377 #ifndef CONFIG_SMP
 378                    "Cpu0ClkTck\t: %016lx\n"
 379 #endif
 380                    ,
 381                    sparc_cpu_type,
 382                    sparc_fpu_type,
 383                    prom_version,
 384                    ((tlb_type == hypervisor) ?
 385                     "sun4v" :
 386                     "sun4u"),
 387                    ncpus_probed,
 388                    num_online_cpus(),
 389                    dcache_parity_tl1_occurred,
 390                    icache_parity_tl1_occurred
 391 #ifndef CONFIG_SMP
 392                    , cpu_data(0).clock_tick
 393 #endif
 394                 );
 395 #ifdef CONFIG_SMP
 396         smp_bogo(m);
 397 #endif
 398         mmu_info(m);
 399 #ifdef CONFIG_SMP
 400         smp_info(m);
 401 #endif
 402         return 0;
 403 }
 404
 405 static void *c_start(struct seq_file *m, loff_t *pos)
 406 {
 407         /* The pointer we are returning is arbitrary,
 408          * it just has to be non-NULL and not IS_ERR
 409          * in the success case.
 410          */
 411         return *pos == 0 ? &c_start : NULL;
 412 }
 413
 414 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 415 {
 416         ++*pos;
 417         return c_start(m, pos);
 418 }
 419
 420 static void c_stop(struct seq_file *m, void *v)
 421 {
 422 }
 423
 424 const struct seq_operations cpuinfo_op = {
 425         .start =c_start,
 426         .next = c_next,
 427         .stop = c_stop,
 428         .show = show_cpuinfo,
 429 };
 430
 431 extern int stop_a_enabled;
 432
 433 void sun_do_break(void)
 434 {
 435         if (!stop_a_enabled)
 436                 return;
 437
 438         prom_printf("\n");
 439         flush_user_windows();
 440
 441         prom_cmdline();
 442 }
 443
 444 int stop_a_enabled = 1;