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 machine_flags = 0; 66 67 struct mem_chunk memory_chunk[MEMORY_CHUNKS]; 68 volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ 69 unsigned long __initdata zholes_size[MAX_NR_ZONES]; 70 static unsigned long __initdata memory_end; 71 72 /* 73 * This is set up by the setup-routine at boot-time 74 * for S390 need to find out, what we have to setup 75 * using address 0x10400 ... 76 */ 77 78 #include <asm/setup.h> 79 80 static struct resource code_resource = { 81 .name = "Kernel code", 82 .flags = IORESOURCE_BUSY | IORESOURCE_MEM, 83 }; 84 85 static struct resource data_resource = { 86 .name = "Kernel data", 87 .flags = IORESOURCE_BUSY | IORESOURCE_MEM, 88 }; 89 90 /* 91 * cpu_init() initializes state that is per-CPU. 92 */ 93 void __devinit cpu_init (void) 94 { 95 int addr = hard_smp_processor_id(); 96 97 /* 98 * Store processor id in lowcore (used e.g. in timer_interrupt) 99 */ 100 asm volatile("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id)); 101 S390_lowcore.cpu_data.cpu_addr = addr; 102 103 /* 104 * Force FPU initialization: 105 */ 106 clear_thread_flag(TIF_USEDFPU); 107 clear_used_math(); 108 109 atomic_inc(&init_mm.mm_count); 110 current->active_mm = &init_mm; 111 if (current->mm) 112 BUG(); 113 enter_lazy_tlb(&init_mm, current); 114 } 115 116 /* 117 * VM halt and poweroff setup routines 118 */ 119 char vmhalt_cmd[128] = ""; 120 char vmpoff_cmd[128] = ""; 121 char vmpanic_cmd[128] = ""; 122 123 static inline void strncpy_skip_quote(char *dst, char *src, int n) 124 { 125 int sx, dx; 126 127 dx = 0; 128 for (sx = 0; src[sx] != 0; sx++) { 129 if (src[sx] == '"') continue; 130 dst[dx++] = src[sx]; 131 if (dx >= n) break; 132 } 133 } 134 135 static int __init vmhalt_setup(char *str) 136 { 137 strncpy_skip_quote(vmhalt_cmd, str, 127); 138 vmhalt_cmd[127] = 0; 139 return 1; 140 } 141 142 __setup("vmhalt=", vmhalt_setup); 143 144 static int __init vmpoff_setup(char *str) 145 { 146 strncpy_skip_quote(vmpoff_cmd, str, 127); 147 vmpoff_cmd[127] = 0; 148 return 1; 149 } 150 151 __setup("vmpoff=", vmpoff_setup); 152 153 static int vmpanic_notify(struct notifier_block *self, unsigned long event, 154 void *data) 155 { 156 if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0) 157 cpcmd(vmpanic_cmd, NULL, 0, NULL); 158 159 return NOTIFY_OK; 160 } 161 162 #define PANIC_PRI_VMPANIC 0 163 164 static struct notifier_block vmpanic_nb = { 165 .notifier_call = vmpanic_notify, 166 .priority = PANIC_PRI_VMPANIC 167 }; 168 169 static int __init vmpanic_setup(char *str) 170 { 171 static int register_done __initdata = 0; 172 173 strncpy_skip_quote(vmpanic_cmd, str, 127); 174 vmpanic_cmd[127] = 0; 175 if (!register_done) { 176 register_done = 1; 177 atomic_notifier_chain_register(&panic_notifier_list, 178 &vmpanic_nb); 179 } 180 return 1; 181 } 182 183 __setup("vmpanic=", vmpanic_setup); 184 185 /* 186 * condev= and conmode= setup parameter. 187 */ 188 189 static int __init condev_setup(char *str) 190 { 191 int vdev; 192 193 vdev = simple_strtoul(str, &str, 0); 194 if (vdev >= 0 && vdev < 65536) { 195 console_devno = vdev; 196 console_irq = -1; 197 } 198 return 1; 199 } 200 201 __setup("condev=", condev_setup); 202 203 static int __init conmode_setup(char *str) 204 { 205 #if defined(CONFIG_SCLP_CONSOLE) 206 if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) 207 SET_CONSOLE_SCLP; 208 #endif 209 #if defined(CONFIG_TN3215_CONSOLE) 210 if (strncmp(str, "3215", 5) == 0) 211 SET_CONSOLE_3215; 212 #endif 213 #if defined(CONFIG_TN3270_CONSOLE) 214 if (strncmp(str, "3270", 5) == 0) 215 SET_CONSOLE_3270; 216 #endif 217 return 1; 218 } 219 220 __setup("conmode=", conmode_setup); 221 222 static void __init conmode_default(void) 223 { 224 char query_buffer[1024]; 225 char *ptr; 226 227 if (MACHINE_IS_VM) { 228 cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); 229 console_devno = simple_strtoul(query_buffer + 5, NULL, 16); 230 ptr = strstr(query_buffer, "SUBCHANNEL ="); 231 console_irq = simple_strtoul(ptr + 13, NULL, 16); 232 cpcmd("QUERY TERM", query_buffer, 1024, NULL); 233 ptr = strstr(query_buffer, "CONMODE"); 234 /* 235 * Set the conmode to 3215 so that the device recognition 236 * will set the cu_type of the console to 3215. If the 237 * conmode is 3270 and we don't set it back then both 238 * 3215 and the 3270 driver will try to access the console 239 * device (3215 as console and 3270 as normal tty). 240 */ 241 cpcmd("TERM CONMODE 3215", NULL, 0, NULL); 242 if (ptr == NULL) { 243 #if defined(CONFIG_SCLP_CONSOLE) 244 SET_CONSOLE_SCLP; 245 #endif 246 return; 247 } 248 if (strncmp(ptr + 8, "3270", 4) == 0) { 249 #if defined(CONFIG_TN3270_CONSOLE) 250 SET_CONSOLE_3270; 251 #elif defined(CONFIG_TN3215_CONSOLE) 252 SET_CONSOLE_3215; 253 #elif defined(CONFIG_SCLP_CONSOLE) 254 SET_CONSOLE_SCLP; 255 #endif 256 } else if (strncmp(ptr + 8, "3215", 4) == 0) { 257 #if defined(CONFIG_TN3215_CONSOLE) 258 SET_CONSOLE_3215; 259 #elif defined(CONFIG_TN3270_CONSOLE) 260 SET_CONSOLE_3270; 261 #elif defined(CONFIG_SCLP_CONSOLE) 262 SET_CONSOLE_SCLP; 263 #endif 264 } 265 } else if (MACHINE_IS_P390) { 266 #if defined(CONFIG_TN3215_CONSOLE) 267 SET_CONSOLE_3215; 268 #elif defined(CONFIG_TN3270_CONSOLE) 269 SET_CONSOLE_3270; 270 #endif 271 } else { 272 #if defined(CONFIG_SCLP_CONSOLE) 273 SET_CONSOLE_SCLP; 274 #endif 275 } 276 } 277 278 #ifdef CONFIG_SMP 279 extern void machine_restart_smp(char *); 280 extern void machine_halt_smp(void); 281 extern void machine_power_off_smp(void); 282 283 void (*_machine_restart)(char *command) = machine_restart_smp; 284 void (*_machine_halt)(void) = machine_halt_smp; 285 void (*_machine_power_off)(void) = machine_power_off_smp; 286 #else 287 /* 288 * Reboot, halt and power_off routines for non SMP. 289 */ 290 static void do_machine_restart_nonsmp(char * __unused) 291 { 292 do_reipl(); 293 } 294 295 static void do_machine_halt_nonsmp(void) 296 { 297 if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) 298 __cpcmd(vmhalt_cmd, NULL, 0, NULL); 299 signal_processor(smp_processor_id(), sigp_stop_and_store_status); 300 } 301 302 static void do_machine_power_off_nonsmp(void) 303 { 304 if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) 305 __cpcmd(vmpoff_cmd, NULL, 0, NULL); 306 signal_processor(smp_processor_id(), sigp_stop_and_store_status); 307 } 308 309 void (*_machine_restart)(char *command) = do_machine_restart_nonsmp; 310 void (*_machine_halt)(void) = do_machine_halt_nonsmp; 311 void (*_machine_power_off)(void) = do_machine_power_off_nonsmp; 312 #endif 313 314 /* 315 * Reboot, halt and power_off stubs. They just call _machine_restart, 316 * _machine_halt or _machine_power_off. 317 */ 318 319 void machine_restart(char *command) 320 { 321 if (!in_interrupt() || oops_in_progress) 322 /* 323 * Only unblank the console if we are called in enabled 324 * context or a bust_spinlocks cleared the way for us. 325 */ 326 console_unblank(); 327 _machine_restart(command); 328 } 329 330 void machine_halt(void) 331 { 332 if (!in_interrupt() || oops_in_progress) 333 /* 334 * Only unblank the console if we are called in enabled 335 * context or a bust_spinlocks cleared the way for us. 336 */ 337 console_unblank(); 338 _machine_halt(); 339 } 340 341 void machine_power_off(void) 342 { 343 if (!in_interrupt() || oops_in_progress) 344 /* 345 * Only unblank the console if we are called in enabled 346 * context or a bust_spinlocks cleared the way for us. 347 */ 348 console_unblank(); 349 _machine_power_off(); 350 } 351 352 /* 353 * Dummy power off function. 354 */ 355 void (*pm_power_off)(void) = machine_power_off; 356 357 static void __init 358 add_memory_hole(unsigned long start, unsigned long end) 359 { 360 unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT; 361 362 if (end <= dma_pfn) 363 zholes_size[ZONE_DMA] += end - start + 1; 364 else if (start > dma_pfn) 365 zholes_size[ZONE_NORMAL] += end - start + 1; 366 else { 367 zholes_size[ZONE_DMA] += dma_pfn - start + 1; 368 zholes_size[ZONE_NORMAL] += end - dma_pfn; 369 } 370 } 371 372 static int __init early_parse_mem(char *p) 373 { 374 memory_end = memparse(p, &p); 375 return 0; 376 } 377 early_param("mem", early_parse_mem); 378 379 /* 380 * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes 381 */ 382 static int __init early_parse_ipldelay(char *p) 383 { 384 unsigned long delay = 0; 385 386 delay = simple_strtoul(p, &p, 0); 387 388 switch (*p) { 389 case 's': 390 case 'S': 391 delay *= 1000000; 392 break; 393 case 'm': 394 case 'M': 395 delay *= 60 * 1000000; 396 } 397 398 /* now wait for the requested amount of time */ 399 udelay(delay); 400 401 return 0; 402 } 403 early_param("ipldelay", early_parse_ipldelay); 404 405 static void __init 406 setup_lowcore(void) 407 { 408 struct _lowcore *lc; 409 int lc_pages; 410 411 /* 412 * Setup lowcore for boot cpu 413 */ 414 lc_pages = sizeof(void *) == 8 ? 2 : 1; 415 lc = (struct _lowcore *) 416 __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); 417 memset(lc, 0, lc_pages * PAGE_SIZE); 418 lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; 419 lc->restart_psw.addr = 420 PSW_ADDR_AMODE | (unsigned long) restart_int_handler; 421 lc->external_new_psw.mask = PSW_KERNEL_BITS; 422 lc->external_new_psw.addr = 423 PSW_ADDR_AMODE | (unsigned long) ext_int_handler; 424 lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT; 425 lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; 426 lc->program_new_psw.mask = PSW_KERNEL_BITS; 427 lc->program_new_psw.addr = 428 PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; 429 lc->mcck_new_psw.mask = 430 PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; 431 lc->mcck_new_psw.addr = 432 PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; 433 lc->io_new_psw.mask = PSW_KERNEL_BITS; 434 lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; 435 lc->ipl_device = S390_lowcore.ipl_device; 436 lc->jiffy_timer = -1LL; 437 lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; 438 lc->async_stack = (unsigned long) 439 __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; 440 lc->panic_stack = (unsigned long) 441 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; 442 lc->current_task = (unsigned long) init_thread_union.thread_info.task; 443 lc->thread_info = (unsigned long) &init_thread_union; 444 #ifndef CONFIG_64BIT 445 if (MACHINE_HAS_IEEE) { 446 lc->extended_save_area_addr = (__u32) 447 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); 448 /* enable extended save area */ 449 __ctl_set_bit(14, 29); 450 } 451 #endif 452 set_prefix((u32)(unsigned long) lc); 453 } 454 455 static void __init 456 setup_resources(void) 457 { 458 struct resource *res; 459 int i; 460 461 code_resource.start = (unsigned long) &_text; 462 code_resource.end = (unsigned long) &_etext - 1; 463 data_resource.start = (unsigned long) &_etext; 464 data_resource.end = (unsigned long) &_edata - 1; 465 466 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { 467 res = alloc_bootmem_low(sizeof(struct resource)); 468 res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; 469 switch (memory_chunk[i].type) { 470 case CHUNK_READ_WRITE: 471 res->name = "System RAM"; 472 break; 473 case CHUNK_READ_ONLY: 474 res->name = "System ROM"; 475 res->flags |= IORESOURCE_READONLY; 476 break; 477 default: 478 res->name = "reserved"; 479 } 480 res->start = memory_chunk[i].addr; 481 res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; 482 request_resource(&iomem_resource, res); 483 request_resource(res, &code_resource); 484 request_resource(res, &data_resource); 485 } 486 } 487 488 static void __init setup_memory_end(void) 489 { 490 unsigned long real_size, memory_size; 491 unsigned long max_mem, max_phys; 492 int i; 493 494 memory_size = real_size = 0; 495 max_phys = VMALLOC_END - VMALLOC_MIN_SIZE; 496 memory_end &= PAGE_MASK; 497 498 max_mem = memory_end ? min(max_phys, memory_end) : max_phys; 499 500 for (i = 0; i < MEMORY_CHUNKS; i++) { 501 struct mem_chunk *chunk = &memory_chunk[i]; 502 503 real_size = max(real_size, chunk->addr + chunk->size); 504 if (chunk->addr >= max_mem) { 505 memset(chunk, 0, sizeof(*chunk)); 506 continue; 507 } 508 if (chunk->addr + chunk->size > max_mem) 509 chunk->size = max_mem - chunk->addr; 510 memory_size = max(memory_size, chunk->addr + chunk->size); 511 } 512 if (!memory_end) 513 memory_end = memory_size; 514 if (real_size > memory_end) 515 printk("More memory detected than supported. Unused: %luk\n", 516 (real_size - memory_end) >> 10); 517 } 518 519 static void __init 520 setup_memory(void) 521 { 522 unsigned long bootmap_size; 523 unsigned long start_pfn, end_pfn, init_pfn; 524 unsigned long last_rw_end; 525 int i; 526 527 /* 528 * partially used pages are not usable - thus 529 * we are rounding upwards: 530 */ 531 start_pfn = PFN_UP(__pa(&_end)); 532 end_pfn = max_pfn = PFN_DOWN(memory_end); 533 534 /* Initialize storage key for kernel pages */ 535 for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++) 536 page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY); 537 538 #ifdef CONFIG_BLK_DEV_INITRD 539 /* 540 * Move the initrd in case the bitmap of the bootmem allocater 541 * would overwrite it. 542 */ 543 544 if (INITRD_START && INITRD_SIZE) { 545 unsigned long bmap_size; 546 unsigned long start; 547 548 bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1); 549 bmap_size = PFN_PHYS(bmap_size); 550 551 if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) { 552 start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE; 553 554 if (start + INITRD_SIZE > memory_end) { 555 printk("initrd extends beyond end of memory " 556 "(0x%08lx > 0x%08lx)\n" 557 "disabling initrd\n", 558 start + INITRD_SIZE, memory_end); 559 INITRD_START = INITRD_SIZE = 0; 560 } else { 561 printk("Moving initrd (0x%08lx -> 0x%08lx, " 562 "size: %ld)\n", 563 INITRD_START, start, INITRD_SIZE); 564 memmove((void *) start, (void *) INITRD_START, 565 INITRD_SIZE); 566 INITRD_START = start; 567 } 568 } 569 } 570 #endif 571 572 /* 573 * Initialize the boot-time allocator 574 */ 575 bootmap_size = init_bootmem(start_pfn, end_pfn); 576 577 /* 578 * Register RAM areas with the bootmem allocator. 579 */ 580 last_rw_end = start_pfn; 581 582 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { 583 unsigned long start_chunk, end_chunk; 584 585 if (memory_chunk[i].type != CHUNK_READ_WRITE) 586 continue; 587 start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1); 588 start_chunk >>= PAGE_SHIFT; 589 end_chunk = (memory_chunk[i].addr + memory_chunk[i].size); 590 end_chunk >>= PAGE_SHIFT; 591 if (start_chunk < start_pfn) 592 start_chunk = start_pfn; 593 if (end_chunk > end_pfn) 594 end_chunk = end_pfn; 595 if (start_chunk < end_chunk) { 596 /* Initialize storage key for RAM pages */ 597 for (init_pfn = start_chunk ; init_pfn < end_chunk; 598 init_pfn++) 599 page_set_storage_key(init_pfn << PAGE_SHIFT, 600 PAGE_DEFAULT_KEY); 601 free_bootmem(start_chunk << PAGE_SHIFT, 602 (end_chunk - start_chunk) << PAGE_SHIFT); 603 if (last_rw_end < start_chunk) 604 add_memory_hole(last_rw_end, start_chunk - 1); 605 last_rw_end = end_chunk; 606 } 607 } 608 609 psw_set_key(PAGE_DEFAULT_KEY); 610 611 if (last_rw_end < end_pfn - 1) 612 add_memory_hole(last_rw_end, end_pfn - 1); 613 614 /* 615 * Reserve the bootmem bitmap itself as well. We do this in two 616 * steps (first step was init_bootmem()) because this catches 617 * the (very unlikely) case of us accidentally initializing the 618 * bootmem allocator with an invalid RAM area. 619 */ 620 reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); 621 622 #ifdef CONFIG_BLK_DEV_INITRD 623 if (INITRD_START && INITRD_SIZE) { 624 if (INITRD_START + INITRD_SIZE <= memory_end) { 625 reserve_bootmem(INITRD_START, INITRD_SIZE); 626 initrd_start = INITRD_START; 627 initrd_end = initrd_start + INITRD_SIZE; 628 } else { 629 printk("initrd extends beyond end of memory " 630 "(0x%08lx > 0x%08lx)\ndisabling initrd\n", 631 initrd_start + INITRD_SIZE, memory_end); 632 initrd_start = initrd_end = 0; 633 } 634 } 635 #endif 636 } 637 638 /* 639 * Setup function called from init/main.c just after the banner 640 * was printed. 641 */ 642 643 void __init 644 setup_arch(char **cmdline_p) 645 { 646 /* 647 * print what head.S has found out about the machine 648 */ 649 #ifndef CONFIG_64BIT 650 printk((MACHINE_IS_VM) ? 651 "We are running under VM (31 bit mode)\n" : 652 "We are running native (31 bit mode)\n"); 653 printk((MACHINE_HAS_IEEE) ? 654 "This machine has an IEEE fpu\n" : 655 "This machine has no IEEE fpu\n"); 656 #else /* CONFIG_64BIT */ 657 printk((MACHINE_IS_VM) ? 658 "We are running under VM (64 bit mode)\n" : 659 "We are running native (64 bit mode)\n"); 660 #endif /* CONFIG_64BIT */ 661 662 /* Save unparsed command line copy for /proc/cmdline */ 663 strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); 664 665 *cmdline_p = COMMAND_LINE; 666 *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0'; 667 668 ROOT_DEV = Root_RAM0; 669 670 init_mm.start_code = PAGE_OFFSET; 671 init_mm.end_code = (unsigned long) &_etext; 672 init_mm.end_data = (unsigned long) &_edata; 673 init_mm.brk = (unsigned long) &_end; 674 675 if (MACHINE_HAS_MVCOS) 676 memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess)); 677 else 678 memcpy(&uaccess, &uaccess_std, sizeof(uaccess)); 679 680 parse_early_param(); 681 682 setup_memory_end(); 683 setup_memory(); 684 setup_resources(); 685 setup_lowcore(); 686 687 cpu_init(); 688 __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; 689 smp_setup_cpu_possible_map(); 690 691 /* 692 * Create kernel page tables and switch to virtual addressing. 693 */ 694 paging_init(); 695 696 /* Setup default console */ 697 conmode_default(); 698 } 699 700 void print_cpu_info(struct cpuinfo_S390 *cpuinfo) 701 { 702 printk("cpu %d " 703 #ifdef CONFIG_SMP 704 "phys_idx=%d " 705 #endif 706 "vers=%02X ident=%06X machine=%04X unused=%04X\n", 707 cpuinfo->cpu_nr, 708 #ifdef CONFIG_SMP 709 cpuinfo->cpu_addr, 710 #endif 711 cpuinfo->cpu_id.version, 712 cpuinfo->cpu_id.ident, 713 cpuinfo->cpu_id.machine, 714 cpuinfo->cpu_id.unused); 715 } 716 717 /* 718 * show_cpuinfo - Get information on one CPU for use by procfs. 719 */ 720 721 static int show_cpuinfo(struct seq_file *m, void *v) 722 { 723 struct cpuinfo_S390 *cpuinfo; 724 unsigned long n = (unsigned long) v - 1; 725 726 preempt_disable(); 727 if (!n) { 728 seq_printf(m, "vendor_id : IBM/S390\n" 729 "# processors : %i\n" 730 "bogomips per cpu: %lu.%02lu\n", 731 num_online_cpus(), loops_per_jiffy/(500000/HZ), 732 (loops_per_jiffy/(5000/HZ))%100); 733 } 734 if (cpu_online(n)) { 735 #ifdef CONFIG_SMP 736 if (smp_processor_id() == n) 737 cpuinfo = &S390_lowcore.cpu_data; 738 else 739 cpuinfo = &lowcore_ptr[n]->cpu_data; 740 #else 741 cpuinfo = &S390_lowcore.cpu_data; 742 #endif 743 seq_printf(m, "processor %li: " 744 "version = %02X, " 745 "identification = %06X, " 746 "machine = %04X\n", 747 n, cpuinfo->cpu_id.version, 748 cpuinfo->cpu_id.ident, 749 cpuinfo->cpu_id.machine); 750 } 751 preempt_enable(); 752 return 0; 753 } 754 755 static void *c_start(struct seq_file *m, loff_t *pos) 756 { 757 return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; 758 } 759 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 760 { 761 ++*pos; 762 return c_start(m, pos); 763 } 764 static void c_stop(struct seq_file *m, void *v) 765 { 766 } 767 struct seq_operations cpuinfo_op = { 768 .start = c_start, 769 .next = c_next, 770 .stop = c_stop, 771 .show = show_cpuinfo, 772 }; 773 774