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/init.h> 32 #include <linux/initrd.h> 33 #include <linux/bootmem.h> 34 #include <linux/root_dev.h> 35 #include <linux/console.h> 36 #include <linux/seq_file.h> 37 #include <linux/kernel_stat.h> 38 #include <linux/device.h> 39 #include <linux/notifier.h> 40 #include <linux/pfn.h> 41 42 #include <asm/uaccess.h> 43 #include <asm/system.h> 44 #include <asm/smp.h> 45 #include <asm/mmu_context.h> 46 #include <asm/cpcmd.h> 47 #include <asm/lowcore.h> 48 #include <asm/irq.h> 49 #include <asm/page.h> 50 #include <asm/ptrace.h> 51 #include <asm/sections.h> 52 53 /* 54 * User copy operations. 55 */ 56 struct uaccess_ops uaccess; 57 EXPORT_SYMBOL_GPL(uaccess); 58 59 /* 60 * Machine setup.. 61 */ 62 unsigned int console_mode = 0; 63 unsigned int console_devno = -1; 64 unsigned int console_irq = -1; 65 unsigned long memory_size = 0; 66 unsigned long machine_flags = 0; 67 struct { 68 unsigned long addr, size, type; 69 } memory_chunk[MEMORY_CHUNKS] = { { 0 } }; 70 #define CHUNK_READ_WRITE 0 71 #define CHUNK_READ_ONLY 1 72 volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ 73 unsigned long __initdata zholes_size[MAX_NR_ZONES]; 74 static unsigned long __initdata memory_end; 75 76 /* 77 * This is set up by the setup-routine at boot-time 78 * for S390 need to find out, what we have to setup 79 * using address 0x10400 ... 80 */ 81 82 #include <asm/setup.h> 83 84 static struct resource code_resource = { 85 .name = "Kernel code", 86 .flags = IORESOURCE_BUSY | IORESOURCE_MEM, 87 }; 88 89 static struct resource data_resource = { 90 .name = "Kernel data", 91 .flags = IORESOURCE_BUSY | IORESOURCE_MEM, 92 }; 93 94 /* 95 * cpu_init() initializes state that is per-CPU. 96 */ 97 void __devinit cpu_init (void) 98 { 99 int addr = hard_smp_processor_id(); 100 101 /* 102 * Store processor id in lowcore (used e.g. in timer_interrupt) 103 */ 104 asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id)); 105 S390_lowcore.cpu_data.cpu_addr = addr; 106 107 /* 108 * Force FPU initialization: 109 */ 110 clear_thread_flag(TIF_USEDFPU); 111 clear_used_math(); 112 113 atomic_inc(&init_mm.mm_count); 114 current->active_mm = &init_mm; 115 if (current->mm) 116 BUG(); 117 enter_lazy_tlb(&init_mm, current); 118 } 119 120 /* 121 * VM halt and poweroff setup routines 122 */ 123 char vmhalt_cmd[128] = ""; 124 char vmpoff_cmd[128] = ""; 125 char vmpanic_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 static int vmpanic_notify(struct notifier_block *self, unsigned long event, 158 void *data) 159 { 160 if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0) 161 cpcmd(vmpanic_cmd, NULL, 0, NULL); 162 163 return NOTIFY_OK; 164 } 165 166 #define PANIC_PRI_VMPANIC 0 167 168 static struct notifier_block vmpanic_nb = { 169 .notifier_call = vmpanic_notify, 170 .priority = PANIC_PRI_VMPANIC 171 }; 172 173 static int __init vmpanic_setup(char *str) 174 { 175 static int register_done __initdata = 0; 176 177 strncpy_skip_quote(vmpanic_cmd, str, 127); 178 vmpanic_cmd[127] = 0; 179 if (!register_done) { 180 register_done = 1; 181 atomic_notifier_chain_register(&panic_notifier_list, 182 &vmpanic_nb); 183 } 184 return 1; 185 } 186 187 __setup("vmpanic=", vmpanic_setup); 188 189 /* 190 * condev= and conmode= setup parameter. 191 */ 192 193 static int __init condev_setup(char *str) 194 { 195 int vdev; 196 197 vdev = simple_strtoul(str, &str, 0); 198 if (vdev >= 0 && vdev < 65536) { 199 console_devno = vdev; 200 console_irq = -1; 201 } 202 return 1; 203 } 204 205 __setup("condev=", condev_setup); 206 207 static int __init conmode_setup(char *str) 208 { 209 #if defined(CONFIG_SCLP_CONSOLE) 210 if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) 211 SET_CONSOLE_SCLP; 212 #endif 213 #if defined(CONFIG_TN3215_CONSOLE) 214 if (strncmp(str, "3215", 5) == 0) 215 SET_CONSOLE_3215; 216 #endif 217 #if defined(CONFIG_TN3270_CONSOLE) 218 if (strncmp(str, "3270", 5) == 0) 219 SET_CONSOLE_3270; 220 #endif 221 return 1; 222 } 223 224 __setup("conmode=", conmode_setup); 225 226 static void __init conmode_default(void) 227 { 228 char query_buffer[1024]; 229 char *ptr; 230 231 if (MACHINE_IS_VM) { 232 __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); 233 console_devno = simple_strtoul(query_buffer + 5, NULL, 16); 234 ptr = strstr(query_buffer, "SUBCHANNEL ="); 235 console_irq = simple_strtoul(ptr + 13, NULL, 16); 236 __cpcmd("QUERY TERM", query_buffer, 1024, NULL); 237 ptr = strstr(query_buffer, "CONMODE"); 238 /* 239 * Set the conmode to 3215 so that the device recognition 240 * will set the cu_type of the console to 3215. If the 241 * conmode is 3270 and we don't set it back then both 242 * 3215 and the 3270 driver will try to access the console 243 * device (3215 as console and 3270 as normal tty). 244 */ 245 __cpcmd("TERM CONMODE 3215", NULL, 0, NULL); 246 if (ptr == NULL) { 247 #if defined(CONFIG_SCLP_CONSOLE) 248 SET_CONSOLE_SCLP; 249 #endif 250 return; 251 } 252 if (strncmp(ptr + 8, "3270", 4) == 0) { 253 #if defined(CONFIG_TN3270_CONSOLE) 254 SET_CONSOLE_3270; 255 #elif defined(CONFIG_TN3215_CONSOLE) 256 SET_CONSOLE_3215; 257 #elif defined(CONFIG_SCLP_CONSOLE) 258 SET_CONSOLE_SCLP; 259 #endif 260 } else if (strncmp(ptr + 8, "3215", 4) == 0) { 261 #if defined(CONFIG_TN3215_CONSOLE) 262 SET_CONSOLE_3215; 263 #elif defined(CONFIG_TN3270_CONSOLE) 264 SET_CONSOLE_3270; 265 #elif defined(CONFIG_SCLP_CONSOLE) 266 SET_CONSOLE_SCLP; 267 #endif 268 } 269 } else if (MACHINE_IS_P390) { 270 #if defined(CONFIG_TN3215_CONSOLE) 271 SET_CONSOLE_3215; 272 #elif defined(CONFIG_TN3270_CONSOLE) 273 SET_CONSOLE_3270; 274 #endif 275 } else { 276 #if defined(CONFIG_SCLP_CONSOLE) 277 SET_CONSOLE_SCLP; 278 #endif 279 } 280 } 281 282 #ifdef CONFIG_SMP 283 extern void machine_restart_smp(char *); 284 extern void machine_halt_smp(void); 285 extern void machine_power_off_smp(void); 286 287 void (*_machine_restart)(char *command) = machine_restart_smp; 288 void (*_machine_halt)(void) = machine_halt_smp; 289 void (*_machine_power_off)(void) = machine_power_off_smp; 290 #else 291 /* 292 * Reboot, halt and power_off routines for non SMP. 293 */ 294 static void do_machine_restart_nonsmp(char * __unused) 295 { 296 do_reipl(); 297 } 298 299 static void do_machine_halt_nonsmp(void) 300 { 301 if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) 302 cpcmd(vmhalt_cmd, NULL, 0, NULL); 303 signal_processor(smp_processor_id(), sigp_stop_and_store_status); 304 } 305 306 static void do_machine_power_off_nonsmp(void) 307 { 308 if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) 309 cpcmd(vmpoff_cmd, NULL, 0, NULL); 310 signal_processor(smp_processor_id(), sigp_stop_and_store_status); 311 } 312 313 void (*_machine_restart)(char *command) = do_machine_restart_nonsmp; 314 void (*_machine_halt)(void) = do_machine_halt_nonsmp; 315 void (*_machine_power_off)(void) = do_machine_power_off_nonsmp; 316 #endif 317 318 /* 319 * Reboot, halt and power_off stubs. They just call _machine_restart, 320 * _machine_halt or _machine_power_off. 321 */ 322 323 void machine_restart(char *command) 324 { 325 if (!in_interrupt() || oops_in_progress) 326 /* 327 * Only unblank the console if we are called in enabled 328 * context or a bust_spinlocks cleared the way for us. 329 */ 330 console_unblank(); 331 _machine_restart(command); 332 } 333 334 void machine_halt(void) 335 { 336 if (!in_interrupt() || oops_in_progress) 337 /* 338 * Only unblank the console if we are called in enabled 339 * context or a bust_spinlocks cleared the way for us. 340 */ 341 console_unblank(); 342 _machine_halt(); 343 } 344 345 void machine_power_off(void) 346 { 347 if (!in_interrupt() || oops_in_progress) 348 /* 349 * Only unblank the console if we are called in enabled 350 * context or a bust_spinlocks cleared the way for us. 351 */ 352 console_unblank(); 353 _machine_power_off(); 354 } 355 356 /* 357 * Dummy power off function. 358 */ 359 void (*pm_power_off)(void) = machine_power_off; 360 361 static void __init 362 add_memory_hole(unsigned long start, unsigned long end) 363 { 364 unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT; 365 366 if (end <= dma_pfn) 367 zholes_size[ZONE_DMA] += end - start + 1; 368 else if (start > dma_pfn) 369 zholes_size[ZONE_NORMAL] += end - start + 1; 370 else { 371 zholes_size[ZONE_DMA] += dma_pfn - start + 1; 372 zholes_size[ZONE_NORMAL] += end - dma_pfn; 373 } 374 } 375 376 static int __init early_parse_mem(char *p) 377 { 378 memory_end = memparse(p, &p); 379 return 0; 380 } 381 early_param("mem", early_parse_mem); 382 383 /* 384 * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes 385 */ 386 static int __init early_parse_ipldelay(char *p) 387 { 388 unsigned long delay = 0; 389 390 delay = simple_strtoul(p, &p, 0); 391 392 switch (*p) { 393 case 's': 394 case 'S': 395 delay *= 1000000; 396 break; 397 case 'm': 398 case 'M': 399 delay *= 60 * 1000000; 400 } 401 402 /* now wait for the requested amount of time */ 403 udelay(delay); 404 405 return 0; 406 } 407 early_param("ipldelay", early_parse_ipldelay); 408 409 static void __init 410 setup_lowcore(void) 411 { 412 struct _lowcore *lc; 413 int lc_pages; 414 415 /* 416 * Setup lowcore for boot cpu 417 */ 418 lc_pages = sizeof(void *) == 8 ? 2 : 1; 419 lc = (struct _lowcore *) 420 __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); 421 memset(lc, 0, lc_pages * PAGE_SIZE); 422 lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; 423 lc->restart_psw.addr = 424 PSW_ADDR_AMODE | (unsigned long) restart_int_handler; 425 lc->external_new_psw.mask = PSW_KERNEL_BITS; 426 lc->external_new_psw.addr = 427 PSW_ADDR_AMODE | (unsigned long) ext_int_handler; 428 lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT; 429 lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; 430 lc->program_new_psw.mask = PSW_KERNEL_BITS; 431 lc->program_new_psw.addr = 432 PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; 433 lc->mcck_new_psw.mask = 434 PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; 435 lc->mcck_new_psw.addr = 436 PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; 437 lc->io_new_psw.mask = PSW_KERNEL_BITS; 438 lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; 439 lc->ipl_device = S390_lowcore.ipl_device; 440 lc->jiffy_timer = -1LL; 441 lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; 442 lc->async_stack = (unsigned long) 443 __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; 444 lc->panic_stack = (unsigned long) 445 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; 446 lc->current_task = (unsigned long) init_thread_union.thread_info.task; 447 lc->thread_info = (unsigned long) &init_thread_union; 448 #ifndef CONFIG_64BIT 449 if (MACHINE_HAS_IEEE) { 450 lc->extended_save_area_addr = (__u32) 451 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); 452 /* enable extended save area */ 453 ctl_set_bit(14, 29); 454 } 455 #endif 456 set_prefix((u32)(unsigned long) lc); 457 } 458 459 static void __init 460 setup_resources(void) 461 { 462 struct resource *res; 463 int i; 464 465 code_resource.start = (unsigned long) &_text; 466 code_resource.end = (unsigned long) &_etext - 1; 467 data_resource.start = (unsigned long) &_etext; 468 data_resource.end = (unsigned long) &_edata - 1; 469 470 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { 471 res = alloc_bootmem_low(sizeof(struct resource)); 472 res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; 473 switch (memory_chunk[i].type) { 474 case CHUNK_READ_WRITE: 475 res->name = "System RAM"; 476 break; 477 case CHUNK_READ_ONLY: 478 res->name = "System ROM"; 479 res->flags |= IORESOURCE_READONLY; 480 break; 481 default: 482 res->name = "reserved"; 483 } 484 res->start = memory_chunk[i].addr; 485 res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; 486 request_resource(&iomem_resource, res); 487 request_resource(res, &code_resource); 488 request_resource(res, &data_resource); 489 } 490 } 491 492 static void __init 493 setup_memory(void) 494 { 495 unsigned long bootmap_size; 496 unsigned long start_pfn, end_pfn, init_pfn; 497 unsigned long last_rw_end; 498 int i; 499 500 /* 501 * partially used pages are not usable - thus 502 * we are rounding upwards: 503 */ 504 start_pfn = PFN_UP(__pa(&_end)); 505 end_pfn = max_pfn = PFN_DOWN(memory_end); 506 507 /* Initialize storage key for kernel pages */ 508 for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++) 509 page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY); 510 511 #ifdef CONFIG_BLK_DEV_INITRD 512 /* 513 * Move the initrd in case the bitmap of the bootmem allocater 514 * would overwrite it. 515 */ 516 517 if (INITRD_START && INITRD_SIZE) { 518 unsigned long bmap_size; 519 unsigned long start; 520 521 bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); 522 bmap_size = PFN_PHYS(bmap_size); 523 524 if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { 525 start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; 526 527 if (start + INITRD_SIZE > memory_end) { 528 printk("initrd extends beyond end of memory " 529 "(0x%08lx > 0x%08lx)\n" 530 "disabling initrd\n", 531 start + INITRD_SIZE, memory_end); 532 INITRD_START = INITRD_SIZE = 0; 533 } else { 534 printk("Moving initrd (0x%08lx -> 0x%08lx, " 535 "size: %ld)\n", 536 INITRD_START, start, INITRD_SIZE); 537 memmove((void *) start, (void *) INITRD_START, 538 INITRD_SIZE); 539 INITRD_START = start; 540 } 541 } 542 } 543 #endif 544 545 /* 546 * Initialize the boot-time allocator (with low memory only): 547 */ 548 bootmap_size = init_bootmem(start_pfn, end_pfn); 549 550 /* 551 * Register RAM areas with the bootmem allocator. 552 */ 553 last_rw_end = start_pfn; 554 555 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { 556 unsigned long start_chunk, end_chunk; 557 558 if (memory_chunk[i].type != CHUNK_READ_WRITE) 559 continue; 560 start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1); 561 start_chunk >>= PAGE_SHIFT; 562 end_chunk = (memory_chunk[i].addr + memory_chunk[i].size); 563 end_chunk >>= PAGE_SHIFT; 564 if (start_chunk < start_pfn) 565 start_chunk = start_pfn; 566 if (end_chunk > end_pfn) 567 end_chunk = end_pfn; 568 if (start_chunk < end_chunk) { 569 /* Initialize storage key for RAM pages */ 570 for (init_pfn = start_chunk ; init_pfn < end_chunk; 571 init_pfn++) 572 page_set_storage_key(init_pfn << PAGE_SHIFT, 573 PAGE_DEFAULT_KEY); 574 free_bootmem(start_chunk << PAGE_SHIFT, 575 (end_chunk - start_chunk) << PAGE_SHIFT); 576 if (last_rw_end < start_chunk) 577 add_memory_hole(last_rw_end, start_chunk - 1); 578 last_rw_end = end_chunk; 579 } 580 } 581 582 psw_set_key(PAGE_DEFAULT_KEY); 583 584 if (last_rw_end < end_pfn - 1) 585 add_memory_hole(last_rw_end, end_pfn - 1); 586 587 /* 588 * Reserve the bootmem bitmap itself as well. We do this in two 589 * steps (first step was init_bootmem()) because this catches 590 * the (very unlikely) case of us accidentally initializing the 591 * bootmem allocator with an invalid RAM area. 592 */ 593 reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); 594 595 #ifdef CONFIG_BLK_DEV_INITRD 596 if (INITRD_START && INITRD_SIZE) { 597 if (INITRD_START + INITRD_SIZE <= memory_end) { 598 reserve_bootmem(INITRD_START, INITRD_SIZE); 599 initrd_start = INITRD_START; 600 initrd_end = initrd_start + INITRD_SIZE; 601 } else { 602 printk("initrd extends beyond end of memory " 603 "(0x%08lx > 0x%08lx)\ndisabling initrd\n", 604 initrd_start + INITRD_SIZE, memory_end); 605 initrd_start = initrd_end = 0; 606 } 607 } 608 #endif 609 } 610 611 /* 612 * Setup function called from init/main.c just after the banner 613 * was printed. 614 */ 615 616 void __init 617 setup_arch(char **cmdline_p) 618 { 619 /* 620 * print what head.S has found out about the machine 621 */ 622 #ifndef CONFIG_64BIT 623 printk((MACHINE_IS_VM) ? 624 "We are running under VM (31 bit mode)\n" : 625 "We are running native (31 bit mode)\n"); 626 printk((MACHINE_HAS_IEEE) ? 627 "This machine has an IEEE fpu\n" : 628 "This machine has no IEEE fpu\n"); 629 #else /* CONFIG_64BIT */ 630 printk((MACHINE_IS_VM) ? 631 "We are running under VM (64 bit mode)\n" : 632 "We are running native (64 bit mode)\n"); 633 #endif /* CONFIG_64BIT */ 634 635 /* Save unparsed command line copy for /proc/cmdline */ 636 strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); 637 638 *cmdline_p = COMMAND_LINE; 639 *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0'; 640 641 ROOT_DEV = Root_RAM0; 642 643 init_mm.start_code = PAGE_OFFSET; 644 init_mm.end_code = (unsigned long) &_etext; 645 init_mm.end_data = (unsigned long) &_edata; 646 init_mm.brk = (unsigned long) &_end; 647 648 memory_end = memory_size; 649 650 if (MACHINE_HAS_MVCOS) 651 memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); 652 else 653 memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); 654 655 parse_early_param(); 656 657 #ifndef CONFIG_64BIT 658 memory_end &= ~0x400000UL; 659 660 /* 661 * We need some free virtual space to be able to do vmalloc. 662 * On a machine with 2GB memory we make sure that we have at 663 * least 128 MB free space for vmalloc. 664 */ 665 if (memory_end > 1920*1024*1024) 666 memory_end = 1920*1024*1024; 667 #else /* CONFIG_64BIT */ 668 memory_end &= ~0x200000UL; 669 #endif /* CONFIG_64BIT */ 670 671 setup_memory(); 672 setup_resources(); 673 setup_lowcore(); 674 675 cpu_init(); 676 __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; 677 smp_setup_cpu_possible_map(); 678 679 /* 680 * Create kernel page tables and switch to virtual addressing. 681 */ 682 paging_init(); 683 684 /* Setup default console */ 685 conmode_default(); 686 } 687 688 void print_cpu_info(struct cpuinfo_S390 *cpuinfo) 689 { 690 printk("cpu %d " 691 #ifdef CONFIG_SMP 692 "phys_idx=%d " 693 #endif 694 "vers=%02X ident=%06X machine=%04X unused=%04X\n", 695 cpuinfo->cpu_nr, 696 #ifdef CONFIG_SMP 697 cpuinfo->cpu_addr, 698 #endif 699 cpuinfo->cpu_id.version, 700 cpuinfo->cpu_id.ident, 701 cpuinfo->cpu_id.machine, 702 cpuinfo->cpu_id.unused); 703 } 704 705 /* 706 * show_cpuinfo - Get information on one CPU for use by procfs. 707 */ 708 709 static int show_cpuinfo(struct seq_file *m, void *v) 710 { 711 struct cpuinfo_S390 *cpuinfo; 712 unsigned long n = (unsigned long) v - 1; 713 714 preempt_disable(); 715 if (!n) { 716 seq_printf(m, "vendor_id : IBM/S390\n" 717 "# processors : %i\n" 718 "bogomips per cpu: %lu.%02lu\n", 719 num_online_cpus(), loops_per_jiffy/(500000/HZ), 720 (loops_per_jiffy/(5000/HZ))%100); 721 } 722 if (cpu_online(n)) { 723 #ifdef CONFIG_SMP 724 if (smp_processor_id() == n) 725 cpuinfo = &S390_lowcore.cpu_data; 726 else 727 cpuinfo = &lowcore_ptr[n]->cpu_data; 728 #else 729 cpuinfo = &S390_lowcore.cpu_data; 730 #endif 731 seq_printf(m, "processor %li: " 732 "version = %02X, " 733 "identification = %06X, " 734 "machine = %04X\n", 735 n, cpuinfo->cpu_id.version, 736 cpuinfo->cpu_id.ident, 737 cpuinfo->cpu_id.machine); 738 } 739 preempt_enable(); 740 return 0; 741 } 742 743 static void *c_start(struct seq_file *m, loff_t *pos) 744 { 745 return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; 746 } 747 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 748 { 749 ++*pos; 750 return c_start(m, pos); 751 } 752 static void c_stop(struct seq_file *m, void *v) 753 { 754 } 755 struct seq_operations cpuinfo_op = { 756 .start = c_start, 757 .next = c_next, 758 .stop = c_stop, 759 .show = show_cpuinfo, 760 }; 761 762