SAFE public projects git trees. - safe/jmp/linux-2.6/blob - arch/s390/kernel/setup.c

   1 /*
   2  *  arch/s390/kernel/setup.c
   3  *
   4  *  S390 version
   5  *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
   6  *    Author(s): Hartmut Penner (hp@de.ibm.com),
   7  *               Martin Schwidefsky (schwidefsky@de.ibm.com)
   8  *
   9  *  Derived from "arch/i386/kernel/setup.c"
  10  *    Copyright (C) 1995, Linus Torvalds
  11  */
  12
  13 /*
  14  * This file handles the architecture-dependent parts of initialization
  15  */
  16
  17 #include <linux/errno.h>
  18 #include <linux/module.h>
  19 #include <linux/sched.h>
  20 #include <linux/kernel.h>
  21 #include <linux/mm.h>
  22 #include <linux/stddef.h>
  23 #include <linux/unistd.h>
  24 #include <linux/ptrace.h>
  25 #include <linux/slab.h>
  26 #include <linux/user.h>
  27 #include <linux/a.out.h>
  28 #include <linux/tty.h>
  29 #include <linux/ioport.h>
  30 #include <linux/delay.h>
  31 #include <linux/config.h>
  32 #include <linux/init.h>
  33 #include <linux/initrd.h>
  34 #include <linux/bootmem.h>
  35 #include <linux/root_dev.h>
  36 #include <linux/console.h>
  37 #include <linux/seq_file.h>
  38 #include <linux/kernel_stat.h>
  39 #include <linux/device.h>
  40
  41 #include <asm/uaccess.h>
  42 #include <asm/system.h>
  43 #include <asm/smp.h>
  44 #include <asm/mmu_context.h>
  45 #include <asm/cpcmd.h>
  46 #include <asm/lowcore.h>
  47 #include <asm/irq.h>
  48 #include <asm/page.h>
  49 #include <asm/ptrace.h>
  50
  51 /*
  52  * Machine setup..
  53  */
  54 unsigned int console_mode = 0;
  55 unsigned int console_devno = -1;
  56 unsigned int console_irq = -1;
  57 unsigned long memory_size = 0;
  58 unsigned long machine_flags = 0;
  59 struct {
  60         unsigned long addr, size, type;
  61 } memory_chunk[MEMORY_CHUNKS] = { { 0 } };
  62 #define CHUNK_READ_WRITE 0
  63 #define CHUNK_READ_ONLY 1
  64 volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
  65 unsigned long __initdata zholes_size[MAX_NR_ZONES];
  66 static unsigned long __initdata memory_end;
  67
  68 /*
  69  * Setup options
  70  */
  71 extern int _text,_etext, _edata, _end;
  72
  73 /*
  74  * This is set up by the setup-routine at boot-time
  75  * for S390 need to find out, what we have to setup
  76  * using address 0x10400 ...
  77  */
  78
  79 #include <asm/setup.h>
  80
  81 static struct resource code_resource = {
  82         .name  = "Kernel code",
  83         .start = (unsigned long) &_text,
  84         .end = (unsigned long) &_etext - 1,
  85         .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
  86 };
  87
  88 static struct resource data_resource = {
  89         .name = "Kernel data",
  90         .start = (unsigned long) &_etext,
  91         .end = (unsigned long) &_edata - 1,
  92         .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
  93 };
  94
  95 /*
  96  * cpu_init() initializes state that is per-CPU.
  97  */
  98 void __devinit cpu_init (void)
  99 {
 100         int addr = hard_smp_processor_id();
 101
 102         /*
 103          * Store processor id in lowcore (used e.g. in timer_interrupt)
 104          */
 105         asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id));
 106         S390_lowcore.cpu_data.cpu_addr = addr;
 107
 108         /*
 109          * Force FPU initialization:
 110          */
 111         clear_thread_flag(TIF_USEDFPU);
 112         clear_used_math();
 113
 114         atomic_inc(&init_mm.mm_count);
 115         current->active_mm = &init_mm;
 116         if (current->mm)
 117                 BUG();
 118         enter_lazy_tlb(&init_mm, current);
 119 }
 120
 121 /*
 122  * VM halt and poweroff setup routines
 123  */
 124 char vmhalt_cmd[128] = "";
 125 char vmpoff_cmd[128] = "";
 126
 127 static inline void strncpy_skip_quote(char *dst, char *src, int n)
 128 {
 129         int sx, dx;
 130
 131         dx = 0;
 132         for (sx = 0; src[sx] != 0; sx++) {
 133                 if (src[sx] == '"') continue;
 134                 dst[dx++] = src[sx];
 135                 if (dx >= n) break;
 136         }
 137 }
 138
 139 static int __init vmhalt_setup(char *str)
 140 {
 141         strncpy_skip_quote(vmhalt_cmd, str, 127);
 142         vmhalt_cmd[127] = 0;
 143         return 1;
 144 }
 145
 146 __setup("vmhalt=", vmhalt_setup);
 147
 148 static int __init vmpoff_setup(char *str)
 149 {
 150         strncpy_skip_quote(vmpoff_cmd, str, 127);
 151         vmpoff_cmd[127] = 0;
 152         return 1;
 153 }
 154
 155 __setup("vmpoff=", vmpoff_setup);
 156
 157 /*
 158  * condev= and conmode= setup parameter.
 159  */
 160
 161 static int __init condev_setup(char *str)
 162 {
 163         int vdev;
 164
 165         vdev = simple_strtoul(str, &str, 0);
 166         if (vdev >= 0 && vdev < 65536) {
 167                 console_devno = vdev;
 168                 console_irq = -1;
 169         }
 170         return 1;
 171 }
 172
 173 __setup("condev=", condev_setup);
 174
 175 static int __init conmode_setup(char *str)
 176 {
 177 #if defined(CONFIG_SCLP_CONSOLE)
 178         if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0)
 179                 SET_CONSOLE_SCLP;
 180 #endif
 181 #if defined(CONFIG_TN3215_CONSOLE)
 182         if (strncmp(str, "3215", 5) == 0)
 183                 SET_CONSOLE_3215;
 184 #endif
 185 #if defined(CONFIG_TN3270_CONSOLE)
 186         if (strncmp(str, "3270", 5) == 0)
 187                 SET_CONSOLE_3270;
 188 #endif
 189         return 1;
 190 }
 191
 192 __setup("conmode=", conmode_setup);
 193
 194 static void __init conmode_default(void)
 195 {
 196         char query_buffer[1024];
 197         char *ptr;
 198
 199         if (MACHINE_IS_VM) {
 200                 __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
 201                 console_devno = simple_strtoul(query_buffer + 5, NULL, 16);
 202                 ptr = strstr(query_buffer, "SUBCHANNEL =");
 203                 console_irq = simple_strtoul(ptr + 13, NULL, 16);
 204                 __cpcmd("QUERY TERM", query_buffer, 1024, NULL);
 205                 ptr = strstr(query_buffer, "CONMODE");
 206                 /*
 207                  * Set the conmode to 3215 so that the device recognition
 208                  * will set the cu_type of the console to 3215. If the
 209                  * conmode is 3270 and we don't set it back then both
 210                  * 3215 and the 3270 driver will try to access the console
 211                  * device (3215 as console and 3270 as normal tty).
 212                  */
 213                 __cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
 214                 if (ptr == NULL) {
 215 #if defined(CONFIG_SCLP_CONSOLE)
 216                         SET_CONSOLE_SCLP;
 217 #endif
 218                         return;
 219                 }
 220                 if (strncmp(ptr + 8, "3270", 4) == 0) {
 221 #if defined(CONFIG_TN3270_CONSOLE)
 222                         SET_CONSOLE_3270;
 223 #elif defined(CONFIG_TN3215_CONSOLE)
 224                         SET_CONSOLE_3215;
 225 #elif defined(CONFIG_SCLP_CONSOLE)
 226                         SET_CONSOLE_SCLP;
 227 #endif
 228                 } else if (strncmp(ptr + 8, "3215", 4) == 0) {
 229 #if defined(CONFIG_TN3215_CONSOLE)
 230                         SET_CONSOLE_3215;
 231 #elif defined(CONFIG_TN3270_CONSOLE)
 232                         SET_CONSOLE_3270;
 233 #elif defined(CONFIG_SCLP_CONSOLE)
 234                         SET_CONSOLE_SCLP;
 235 #endif
 236                 }
 237         } else if (MACHINE_IS_P390) {
 238 #if defined(CONFIG_TN3215_CONSOLE)
 239                 SET_CONSOLE_3215;
 240 #elif defined(CONFIG_TN3270_CONSOLE)
 241                 SET_CONSOLE_3270;
 242 #endif
 243         } else {
 244 #if defined(CONFIG_SCLP_CONSOLE)
 245                 SET_CONSOLE_SCLP;
 246 #endif
 247         }
 248 }
 249
 250 #ifdef CONFIG_SMP
 251 extern void machine_restart_smp(char *);
 252 extern void machine_halt_smp(void);
 253 extern void machine_power_off_smp(void);
 254
 255 void (*_machine_restart)(char *command) = machine_restart_smp;
 256 void (*_machine_halt)(void) = machine_halt_smp;
 257 void (*_machine_power_off)(void) = machine_power_off_smp;
 258 #else
 259 /*
 260  * Reboot, halt and power_off routines for non SMP.
 261  */
 262 extern void reipl(unsigned long devno);
 263 extern void reipl_diag(void);
 264 static void do_machine_restart_nonsmp(char * __unused)
 265 {
 266         reipl_diag();
 267
 268         if (MACHINE_IS_VM)
 269                 cpcmd ("IPL", NULL, 0, NULL);
 270         else
 271                 reipl (0x10000 | S390_lowcore.ipl_device);
 272 }
 273
 274 static void do_machine_halt_nonsmp(void)
 275 {
 276         if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
 277                 cpcmd(vmhalt_cmd, NULL, 0, NULL);
 278         signal_processor(smp_processor_id(), sigp_stop_and_store_status);
 279 }
 280
 281 static void do_machine_power_off_nonsmp(void)
 282 {
 283         if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
 284                 cpcmd(vmpoff_cmd, NULL, 0, NULL);
 285         signal_processor(smp_processor_id(), sigp_stop_and_store_status);
 286 }
 287
 288 void (*_machine_restart)(char *command) = do_machine_restart_nonsmp;
 289 void (*_machine_halt)(void) = do_machine_halt_nonsmp;
 290 void (*_machine_power_off)(void) = do_machine_power_off_nonsmp;
 291 #endif
 292
 293  /*
 294  * Reboot, halt and power_off stubs. They just call _machine_restart,
 295  * _machine_halt or _machine_power_off.
 296  */
 297
 298 void machine_restart(char *command)
 299 {
 300         console_unblank();
 301         _machine_restart(command);
 302 }
 303
 304 void machine_halt(void)
 305 {
 306         console_unblank();
 307         _machine_halt();
 308 }
 309
 310 void machine_power_off(void)
 311 {
 312         console_unblank();
 313         _machine_power_off();
 314 }
 315
 316 /*
 317  * Dummy power off function.
 318  */
 319 void (*pm_power_off)(void) = machine_power_off;
 320
 321 static void __init
 322 add_memory_hole(unsigned long start, unsigned long end)
 323 {
 324         unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
 325
 326         if (end <= dma_pfn)
 327                 zholes_size[ZONE_DMA] += end - start + 1;
 328         else if (start > dma_pfn)
 329                 zholes_size[ZONE_NORMAL] += end - start + 1;
 330         else {
 331                 zholes_size[ZONE_DMA] += dma_pfn - start + 1;
 332                 zholes_size[ZONE_NORMAL] += end - dma_pfn;
 333         }
 334 }
 335
 336 static int __init early_parse_mem(char *p)
 337 {
 338         memory_end = memparse(p, &p);
 339         return 0;
 340 }
 341 early_param("mem", early_parse_mem);
 342
 343 /*
 344  * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
 345  */
 346 static int __init early_parse_ipldelay(char *p)
 347 {
 348         unsigned long delay = 0;
 349
 350         delay = simple_strtoul(p, &p, 0);
 351
 352         switch (*p) {
 353         case 's':
 354         case 'S':
 355                 delay *= 1000000;
 356                 break;
 357         case 'm':
 358         case 'M':
 359                 delay *= 60 * 1000000;
 360         }
 361
 362         /* now wait for the requested amount of time */
 363         udelay(delay);
 364
 365         return 0;
 366 }
 367 early_param("ipldelay", early_parse_ipldelay);
 368
 369 static void __init
 370 setup_lowcore(void)
 371 {
 372         struct _lowcore *lc;
 373         int lc_pages;
 374
 375         /*
 376          * Setup lowcore for boot cpu
 377          */
 378         lc_pages = sizeof(void *) == 8 ? 2 : 1;
 379         lc = (struct _lowcore *)
 380                 __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
 381         memset(lc, 0, lc_pages * PAGE_SIZE);
 382         lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
 383         lc->restart_psw.addr =
 384                 PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
 385         lc->external_new_psw.mask = PSW_KERNEL_BITS;
 386         lc->external_new_psw.addr =
 387                 PSW_ADDR_AMODE | (unsigned long) ext_int_handler;
 388         lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT;
 389         lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call;
 390         lc->program_new_psw.mask = PSW_KERNEL_BITS;
 391         lc->program_new_psw.addr =
 392                 PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
 393         lc->mcck_new_psw.mask =
 394                 PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
 395         lc->mcck_new_psw.addr =
 396                 PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
 397         lc->io_new_psw.mask = PSW_KERNEL_BITS;
 398         lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
 399         lc->ipl_device = S390_lowcore.ipl_device;
 400         lc->jiffy_timer = -1LL;
 401         lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
 402         lc->async_stack = (unsigned long)
 403                 __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
 404         lc->panic_stack = (unsigned long)
 405                 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
 406         lc->current_task = (unsigned long) init_thread_union.thread_info.task;
 407         lc->thread_info = (unsigned long) &init_thread_union;
 408 #ifndef CONFIG_64BIT
 409         if (MACHINE_HAS_IEEE) {
 410                 lc->extended_save_area_addr = (__u32)
 411                         __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
 412                 /* enable extended save area */
 413                 ctl_set_bit(14, 29);
 414         }
 415 #endif
 416         set_prefix((u32)(unsigned long) lc);
 417 }
 418
 419 static void __init
 420 setup_resources(void)
 421 {
 422         struct resource *res;
 423         int i;
 424
 425         for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
 426                 res = alloc_bootmem_low(sizeof(struct resource));
 427                 res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
 428                 switch (memory_chunk[i].type) {
 429                 case CHUNK_READ_WRITE:
 430                         res->name = "System RAM";
 431                         break;
 432                 case CHUNK_READ_ONLY:
 433                         res->name = "System ROM";
 434                         res->flags |= IORESOURCE_READONLY;
 435                         break;
 436                 default:
 437                         res->name = "reserved";
 438                 }
 439                 res->start = memory_chunk[i].addr;
 440                 res->end = memory_chunk[i].addr +  memory_chunk[i].size - 1;
 441                 request_resource(&iomem_resource, res);
 442                 request_resource(res, &code_resource);
 443                 request_resource(res, &data_resource);
 444         }
 445 }
 446
 447 static void __init
 448 setup_memory(void)
 449 {
 450         unsigned long bootmap_size;
 451         unsigned long start_pfn, end_pfn, init_pfn;
 452         unsigned long last_rw_end;
 453         int i;
 454
 455         /*
 456          * partially used pages are not usable - thus
 457          * we are rounding upwards:
 458          */
 459         start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT;
 460         end_pfn = max_pfn = memory_end >> PAGE_SHIFT;
 461
 462         /* Initialize storage key for kernel pages */
 463         for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++)
 464                 page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
 465
 466         /*
 467          * Initialize the boot-time allocator (with low memory only):
 468          */
 469         bootmap_size = init_bootmem(start_pfn, end_pfn);
 470
 471         /*
 472          * Register RAM areas with the bootmem allocator.
 473          */
 474         last_rw_end = start_pfn;
 475
 476         for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
 477                 unsigned long start_chunk, end_chunk;
 478
 479                 if (memory_chunk[i].type != CHUNK_READ_WRITE)
 480                         continue;
 481                 start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);
 482                 start_chunk >>= PAGE_SHIFT;
 483                 end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);
 484                 end_chunk >>= PAGE_SHIFT;
 485                 if (start_chunk < start_pfn)
 486                         start_chunk = start_pfn;
 487                 if (end_chunk > end_pfn)
 488                         end_chunk = end_pfn;
 489                 if (start_chunk < end_chunk) {
 490                         /* Initialize storage key for RAM pages */
 491                         for (init_pfn = start_chunk ; init_pfn < end_chunk;
 492                              init_pfn++)
 493                                 page_set_storage_key(init_pfn << PAGE_SHIFT,
 494                                                      PAGE_DEFAULT_KEY);
 495                         free_bootmem(start_chunk << PAGE_SHIFT,
 496                                      (end_chunk - start_chunk) << PAGE_SHIFT);
 497                         if (last_rw_end < start_chunk)
 498                                 add_memory_hole(last_rw_end, start_chunk - 1);
 499                         last_rw_end = end_chunk;
 500                 }
 501         }
 502
 503         psw_set_key(PAGE_DEFAULT_KEY);
 504
 505         if (last_rw_end < end_pfn - 1)
 506                 add_memory_hole(last_rw_end, end_pfn - 1);
 507
 508         /*
 509          * Reserve the bootmem bitmap itself as well. We do this in two
 510          * steps (first step was init_bootmem()) because this catches
 511          * the (very unlikely) case of us accidentally initializing the
 512          * bootmem allocator with an invalid RAM area.
 513          */
 514         reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size);
 515
 516 #ifdef CONFIG_BLK_DEV_INITRD
 517         if (INITRD_START) {
 518                 if (INITRD_START + INITRD_SIZE <= memory_end) {
 519                         reserve_bootmem(INITRD_START, INITRD_SIZE);
 520                         initrd_start = INITRD_START;
 521                         initrd_end = initrd_start + INITRD_SIZE;
 522                 } else {
 523                         printk("initrd extends beyond end of memory "
 524                                "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
 525                                initrd_start + INITRD_SIZE, memory_end);
 526                         initrd_start = initrd_end = 0;
 527                 }
 528         }
 529 #endif
 530 }
 531
 532 /*
 533  * Setup function called from init/main.c just after the banner
 534  * was printed.
 535  */
 536
 537 void __init
 538 setup_arch(char **cmdline_p)
 539 {
 540         /*
 541          * print what head.S has found out about the machine
 542          */
 543 #ifndef CONFIG_64BIT
 544         printk((MACHINE_IS_VM) ?
 545                "We are running under VM (31 bit mode)\n" :
 546                "We are running native (31 bit mode)\n");
 547         printk((MACHINE_HAS_IEEE) ?
 548                "This machine has an IEEE fpu\n" :
 549                "This machine has no IEEE fpu\n");
 550 #else /* CONFIG_64BIT */
 551         printk((MACHINE_IS_VM) ?
 552                "We are running under VM (64 bit mode)\n" :
 553                "We are running native (64 bit mode)\n");
 554 #endif /* CONFIG_64BIT */
 555
 556         /* Save unparsed command line copy for /proc/cmdline */
 557         strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
 558
 559         *cmdline_p = COMMAND_LINE;
 560         *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0';
 561
 562         ROOT_DEV = Root_RAM0;
 563
 564         init_mm.start_code = PAGE_OFFSET;
 565         init_mm.end_code = (unsigned long) &_etext;
 566         init_mm.end_data = (unsigned long) &_edata;
 567         init_mm.brk = (unsigned long) &_end;
 568
 569         memory_end = memory_size;
 570
 571         parse_early_param();
 572
 573 #ifndef CONFIG_64BIT
 574         memory_end &= ~0x400000UL;
 575
 576         /*
 577          * We need some free virtual space to be able to do vmalloc.
 578          * On a machine with 2GB memory we make sure that we have at
 579          * least 128 MB free space for vmalloc.
 580          */
 581         if (memory_end > 1920*1024*1024)
 582                 memory_end = 1920*1024*1024;
 583 #else /* CONFIG_64BIT */
 584         memory_end &= ~0x200000UL;
 585 #endif /* CONFIG_64BIT */
 586
 587         setup_memory();
 588         setup_resources();
 589         setup_lowcore();
 590
 591         cpu_init();
 592         __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
 593         smp_setup_cpu_possible_map();
 594
 595         /*
 596          * Create kernel page tables and switch to virtual addressing.
 597          */
 598         paging_init();
 599
 600         /* Setup default console */
 601         conmode_default();
 602 }
 603
 604 void print_cpu_info(struct cpuinfo_S390 *cpuinfo)
 605 {
 606    printk("cpu %d "
 607 #ifdef CONFIG_SMP
 608            "phys_idx=%d "
 609 #endif
 610            "vers=%02X ident=%06X machine=%04X unused=%04X\n",
 611            cpuinfo->cpu_nr,
 612 #ifdef CONFIG_SMP
 613            cpuinfo->cpu_addr,
 614 #endif
 615            cpuinfo->cpu_id.version,
 616            cpuinfo->cpu_id.ident,
 617            cpuinfo->cpu_id.machine,
 618            cpuinfo->cpu_id.unused);
 619 }
 620
 621 /*
 622  * show_cpuinfo - Get information on one CPU for use by procfs.
 623  */
 624
 625 static int show_cpuinfo(struct seq_file *m, void *v)
 626 {
 627         struct cpuinfo_S390 *cpuinfo;
 628         unsigned long n = (unsigned long) v - 1;
 629
 630         preempt_disable();
 631         if (!n) {
 632                 seq_printf(m, "vendor_id       : IBM/S390\n"
 633                                "# processors    : %i\n"
 634                                "bogomips per cpu: %lu.%02lu\n",
 635                                num_online_cpus(), loops_per_jiffy/(500000/HZ),
 636                                (loops_per_jiffy/(5000/HZ))%100);
 637         }
 638         if (cpu_online(n)) {
 639 #ifdef CONFIG_SMP
 640                 if (smp_processor_id() == n)
 641                         cpuinfo = &S390_lowcore.cpu_data;
 642                 else
 643                         cpuinfo = &lowcore_ptr[n]->cpu_data;
 644 #else
 645                 cpuinfo = &S390_lowcore.cpu_data;
 646 #endif
 647                 seq_printf(m, "processor %li: "
 648                                "version = %02X,  "
 649                                "identification = %06X,  "
 650                                "machine = %04X\n",
 651                                n, cpuinfo->cpu_id.version,
 652                                cpuinfo->cpu_id.ident,
 653                                cpuinfo->cpu_id.machine);
 654         }
 655         preempt_enable();
 656         return 0;
 657 }
 658
 659 static void *c_start(struct seq_file *m, loff_t *pos)
 660 {
 661         return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL;
 662 }
 663 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 664 {
 665         ++*pos;
 666         return c_start(m, pos);
 667 }
 668 static void c_stop(struct seq_file *m, void *v)
 669 {
 670 }
 671 struct seq_operations cpuinfo_op = {
 672         .start  = c_start,
 673         .next   = c_next,
 674         .stop   = c_stop,
 675         .show   = show_cpuinfo,
 676 };
 677
 678 #define DEFINE_IPL_ATTR(_name, _format, _value)                 \
 679 static ssize_t ipl_##_name##_show(struct subsystem *subsys,     \
 680                 char *page)                                     \
 681 {                                                               \
 682         return sprintf(page, _format, _value);                  \
 683 }                                                               \
 684 static struct subsys_attribute ipl_##_name##_attr =             \
 685         __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL);
 686
 687 DEFINE_IPL_ATTR(wwpn, "0x%016llx\n", (unsigned long long)
 688                 IPL_PARMBLOCK_START->fcp.wwpn);
 689 DEFINE_IPL_ATTR(lun, "0x%016llx\n", (unsigned long long)
 690                 IPL_PARMBLOCK_START->fcp.lun);
 691 DEFINE_IPL_ATTR(bootprog, "%lld\n", (unsigned long long)
 692                 IPL_PARMBLOCK_START->fcp.bootprog);
 693 DEFINE_IPL_ATTR(br_lba, "%lld\n", (unsigned long long)
 694                 IPL_PARMBLOCK_START->fcp.br_lba);
 695
 696 enum ipl_type_type {
 697         ipl_type_unknown,
 698         ipl_type_ccw,
 699         ipl_type_fcp,
 700 };
 701
 702 static enum ipl_type_type
 703 get_ipl_type(void)
 704 {
 705         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 706
 707         if (!IPL_DEVNO_VALID)
 708                 return ipl_type_unknown;
 709         if (!IPL_PARMBLOCK_VALID)
 710                 return ipl_type_ccw;
 711         if (ipl->hdr.header.version > IPL_MAX_SUPPORTED_VERSION)
 712                 return ipl_type_unknown;
 713         if (ipl->fcp.pbt != IPL_TYPE_FCP)
 714                 return ipl_type_unknown;
 715         return ipl_type_fcp;
 716 }
 717
 718 static ssize_t
 719 ipl_type_show(struct subsystem *subsys, char *page)
 720 {
 721         switch (get_ipl_type()) {
 722         case ipl_type_ccw:
 723                 return sprintf(page, "ccw\n");
 724         case ipl_type_fcp:
 725                 return sprintf(page, "fcp\n");
 726         default:
 727                 return sprintf(page, "unknown\n");
 728         }
 729 }
 730
 731 static struct subsys_attribute ipl_type_attr = __ATTR_RO(ipl_type);
 732
 733 static ssize_t
 734 ipl_device_show(struct subsystem *subsys, char *page)
 735 {
 736         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 737
 738         switch (get_ipl_type()) {
 739         case ipl_type_ccw:
 740                 return sprintf(page, "0.0.%04x\n", ipl_devno);
 741         case ipl_type_fcp:
 742                 return sprintf(page, "0.0.%04x\n", ipl->fcp.devno);
 743         default:
 744                 return 0;
 745         }
 746 }
 747
 748 static struct subsys_attribute ipl_device_attr =
 749         __ATTR(device, S_IRUGO, ipl_device_show, NULL);
 750
 751 static struct attribute *ipl_fcp_attrs[] = {
 752         &ipl_type_attr.attr,
 753         &ipl_device_attr.attr,
 754         &ipl_wwpn_attr.attr,
 755         &ipl_lun_attr.attr,
 756         &ipl_bootprog_attr.attr,
 757         &ipl_br_lba_attr.attr,
 758         NULL,
 759 };
 760
 761 static struct attribute_group ipl_fcp_attr_group = {
 762         .attrs = ipl_fcp_attrs,
 763 };
 764
 765 static struct attribute *ipl_ccw_attrs[] = {
 766         &ipl_type_attr.attr,
 767         &ipl_device_attr.attr,
 768         NULL,
 769 };
 770
 771 static struct attribute_group ipl_ccw_attr_group = {
 772         .attrs = ipl_ccw_attrs,
 773 };
 774
 775 static struct attribute *ipl_unknown_attrs[] = {
 776         &ipl_type_attr.attr,
 777         NULL,
 778 };
 779
 780 static struct attribute_group ipl_unknown_attr_group = {
 781         .attrs = ipl_unknown_attrs,
 782 };
 783
 784 static ssize_t
 785 ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
 786 {
 787         unsigned int size = IPL_PARMBLOCK_SIZE;
 788
 789         if (off > size)
 790                 return 0;
 791         if (off + count > size)
 792                 count = size - off;
 793
 794         memcpy(buf, (void *) IPL_PARMBLOCK_START + off, count);
 795         return count;
 796 }
 797
 798 static struct bin_attribute ipl_parameter_attr = {
 799         .attr = {
 800                 .name = "binary_parameter",
 801                 .mode = S_IRUGO,
 802                 .owner = THIS_MODULE,
 803         },
 804         .size = PAGE_SIZE,
 805         .read = &ipl_parameter_read,
 806 };
 807
 808 static ssize_t
 809 ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
 810 {
 811         unsigned int size =  IPL_PARMBLOCK_START->fcp.scp_data_len;
 812         void *scp_data = &IPL_PARMBLOCK_START->fcp.scp_data;
 813
 814         if (off > size)
 815                 return 0;
 816         if (off + count > size)
 817                 count = size - off;
 818
 819         memcpy(buf, scp_data + off, count);
 820         return count;
 821 }
 822
 823 static struct bin_attribute ipl_scp_data_attr = {
 824         .attr = {
 825                 .name = "scp_data",
 826                 .mode = S_IRUGO,
 827                 .owner = THIS_MODULE,
 828         },
 829         .size = PAGE_SIZE,
 830         .read = &ipl_scp_data_read,
 831 };
 832
 833 static decl_subsys(ipl, NULL, NULL);
 834
 835 static int __init
 836 ipl_device_sysfs_register(void) {
 837         int rc;
 838
 839         rc = firmware_register(&ipl_subsys);
 840         if (rc)
 841                 return rc;
 842
 843         switch (get_ipl_type()) {
 844         case ipl_type_ccw:
 845                 sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_ccw_attr_group);
 846                 break;
 847         case ipl_type_fcp:
 848                 sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group);
 849                 sysfs_create_bin_file(&ipl_subsys.kset.kobj,
 850                                       &ipl_parameter_attr);
 851                 sysfs_create_bin_file(&ipl_subsys.kset.kobj,
 852                                       &ipl_scp_data_attr);
 853                 break;
 854         default:
 855                 sysfs_create_group(&ipl_subsys.kset.kobj,
 856                                    &ipl_unknown_attr_group);
 857                 break;
 858         }
 859         return 0;
 860 }
 861
 862 __initcall(ipl_device_sysfs_register);