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 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 #include <asm/sections.h> 51 52 /* 53 * Machine setup.. 54 */ 55 unsigned int console_mode = 0; 56 unsigned int console_devno = -1; 57 unsigned int console_irq = -1; 58 unsigned long memory_size = 0; 59 unsigned long machine_flags = 0; 60 struct { 61 unsigned long addr, size, type; 62 } memory_chunk[MEMORY_CHUNKS] = { { 0 } }; 63 #define CHUNK_READ_WRITE 0 64 #define CHUNK_READ_ONLY 1 65 volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ 66 unsigned long __initdata zholes_size[MAX_NR_ZONES]; 67 static unsigned long __initdata memory_end; 68 69 /* 70 * This is set up by the setup-routine at boot-time 71 * for S390 need to find out, what we have to setup 72 * using address 0x10400 ... 73 */ 74 75 #include <asm/setup.h> 76 77 static struct resource code_resource = { 78 .name = "Kernel code", 79 .flags = IORESOURCE_BUSY | IORESOURCE_MEM, 80 }; 81 82 static struct resource data_resource = { 83 .name = "Kernel data", 84 .flags = IORESOURCE_BUSY | IORESOURCE_MEM, 85 }; 86 87 /* 88 * cpu_init() initializes state that is per-CPU. 89 */ 90 void __devinit cpu_init (void) 91 { 92 int addr = hard_smp_processor_id(); 93 94 /* 95 * Store processor id in lowcore (used e.g. in timer_interrupt) 96 */ 97 asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id)); 98 S390_lowcore.cpu_data.cpu_addr = addr; 99 100 /* 101 * Force FPU initialization: 102 */ 103 clear_thread_flag(TIF_USEDFPU); 104 clear_used_math(); 105 106 atomic_inc(&init_mm.mm_count); 107 current->active_mm = &init_mm; 108 if (current->mm) 109 BUG(); 110 enter_lazy_tlb(&init_mm, current); 111 } 112 113 /* 114 * VM halt and poweroff setup routines 115 */ 116 char vmhalt_cmd[128] = ""; 117 char vmpoff_cmd[128] = ""; 118 char vmpanic_cmd[128] = ""; 119 120 static inline void strncpy_skip_quote(char *dst, char *src, int n) 121 { 122 int sx, dx; 123 124 dx = 0; 125 for (sx = 0; src[sx] != 0; sx++) { 126 if (src[sx] == '"') continue; 127 dst[dx++] = src[sx]; 128 if (dx >= n) break; 129 } 130 } 131 132 static int __init vmhalt_setup(char *str) 133 { 134 strncpy_skip_quote(vmhalt_cmd, str, 127); 135 vmhalt_cmd[127] = 0; 136 return 1; 137 } 138 139 __setup("vmhalt=", vmhalt_setup); 140 141 static int __init vmpoff_setup(char *str) 142 { 143 strncpy_skip_quote(vmpoff_cmd, str, 127); 144 vmpoff_cmd[127] = 0; 145 return 1; 146 } 147 148 __setup("vmpoff=", vmpoff_setup); 149 150 static int vmpanic_notify(struct notifier_block *self, unsigned long event, 151 void *data) 152 { 153 if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0) 154 cpcmd(vmpanic_cmd, NULL, 0, NULL); 155 156 return NOTIFY_OK; 157 } 158 159 #define PANIC_PRI_VMPANIC 0 160 161 static struct notifier_block vmpanic_nb = { 162 .notifier_call = vmpanic_notify, 163 .priority = PANIC_PRI_VMPANIC 164 }; 165 166 static int __init vmpanic_setup(char *str) 167 { 168 static int register_done __initdata = 0; 169 170 strncpy_skip_quote(vmpanic_cmd, str, 127); 171 vmpanic_cmd[127] = 0; 172 if (!register_done) { 173 register_done = 1; 174 atomic_notifier_chain_register(&panic_notifier_list, 175 &vmpanic_nb); 176 } 177 return 1; 178 } 179 180 __setup("vmpanic=", vmpanic_setup); 181 182 /* 183 * condev= and conmode= setup parameter. 184 */ 185 186 static int __init condev_setup(char *str) 187 { 188 int vdev; 189 190 vdev = simple_strtoul(str, &str, 0); 191 if (vdev >= 0 && vdev < 65536) { 192 console_devno = vdev; 193 console_irq = -1; 194 } 195 return 1; 196 } 197 198 __setup("condev=", condev_setup); 199 200 static int __init conmode_setup(char *str) 201 { 202 #if defined(CONFIG_SCLP_CONSOLE) 203 if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) 204 SET_CONSOLE_SCLP; 205 #endif 206 #if defined(CONFIG_TN3215_CONSOLE) 207 if (strncmp(str, "3215", 5) == 0) 208 SET_CONSOLE_3215; 209 #endif 210 #if defined(CONFIG_TN3270_CONSOLE) 211 if (strncmp(str, "3270", 5) == 0) 212 SET_CONSOLE_3270; 213 #endif 214 return 1; 215 } 216 217 __setup("conmode=", conmode_setup); 218 219 static void __init conmode_default(void) 220 { 221 char query_buffer[1024]; 222 char *ptr; 223 224 if (MACHINE_IS_VM) { 225 __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); 226 console_devno = simple_strtoul(query_buffer + 5, NULL, 16); 227 ptr = strstr(query_buffer, "SUBCHANNEL ="); 228 console_irq = simple_strtoul(ptr + 13, NULL, 16); 229 __cpcmd("QUERY TERM", query_buffer, 1024, NULL); 230 ptr = strstr(query_buffer, "CONMODE"); 231 /* 232 * Set the conmode to 3215 so that the device recognition 233 * will set the cu_type of the console to 3215. If the 234 * conmode is 3270 and we don't set it back then both 235 * 3215 and the 3270 driver will try to access the console 236 * device (3215 as console and 3270 as normal tty). 237 */ 238 __cpcmd("TERM CONMODE 3215", NULL, 0, NULL); 239 if (ptr == NULL) { 240 #if defined(CONFIG_SCLP_CONSOLE) 241 SET_CONSOLE_SCLP; 242 #endif 243 return; 244 } 245 if (strncmp(ptr + 8, "3270", 4) == 0) { 246 #if defined(CONFIG_TN3270_CONSOLE) 247 SET_CONSOLE_3270; 248 #elif defined(CONFIG_TN3215_CONSOLE) 249 SET_CONSOLE_3215; 250 #elif defined(CONFIG_SCLP_CONSOLE) 251 SET_CONSOLE_SCLP; 252 #endif 253 } else if (strncmp(ptr + 8, "3215", 4) == 0) { 254 #if defined(CONFIG_TN3215_CONSOLE) 255 SET_CONSOLE_3215; 256 #elif defined(CONFIG_TN3270_CONSOLE) 257 SET_CONSOLE_3270; 258 #elif defined(CONFIG_SCLP_CONSOLE) 259 SET_CONSOLE_SCLP; 260 #endif 261 } 262 } else if (MACHINE_IS_P390) { 263 #if defined(CONFIG_TN3215_CONSOLE) 264 SET_CONSOLE_3215; 265 #elif defined(CONFIG_TN3270_CONSOLE) 266 SET_CONSOLE_3270; 267 #endif 268 } else { 269 #if defined(CONFIG_SCLP_CONSOLE) 270 SET_CONSOLE_SCLP; 271 #endif 272 } 273 } 274 275 #ifdef CONFIG_SMP 276 extern void machine_restart_smp(char *); 277 extern void machine_halt_smp(void); 278 extern void machine_power_off_smp(void); 279 280 void (*_machine_restart)(char *command) = machine_restart_smp; 281 void (*_machine_halt)(void) = machine_halt_smp; 282 void (*_machine_power_off)(void) = machine_power_off_smp; 283 #else 284 /* 285 * Reboot, halt and power_off routines for non SMP. 286 */ 287 extern void reipl(unsigned long devno); 288 extern void reipl_diag(void); 289 static void do_machine_restart_nonsmp(char * __unused) 290 { 291 reipl_diag(); 292 293 if (MACHINE_IS_VM) 294 cpcmd ("IPL", NULL, 0, NULL); 295 else 296 reipl (0x10000 | S390_lowcore.ipl_device); 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 = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT; 505 end_pfn = max_pfn = memory_end >> PAGE_SHIFT; 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 /* 512 * Initialize the boot-time allocator (with low memory only): 513 */ 514 bootmap_size = init_bootmem(start_pfn, end_pfn); 515 516 /* 517 * Register RAM areas with the bootmem allocator. 518 */ 519 last_rw_end = start_pfn; 520 521 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { 522 unsigned long start_chunk, end_chunk; 523 524 if (memory_chunk[i].type != CHUNK_READ_WRITE) 525 continue; 526 start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1); 527 start_chunk >>= PAGE_SHIFT; 528 end_chunk = (memory_chunk[i].addr + memory_chunk[i].size); 529 end_chunk >>= PAGE_SHIFT; 530 if (start_chunk < start_pfn) 531 start_chunk = start_pfn; 532 if (end_chunk > end_pfn) 533 end_chunk = end_pfn; 534 if (start_chunk < end_chunk) { 535 /* Initialize storage key for RAM pages */ 536 for (init_pfn = start_chunk ; init_pfn < end_chunk; 537 init_pfn++) 538 page_set_storage_key(init_pfn << PAGE_SHIFT, 539 PAGE_DEFAULT_KEY); 540 free_bootmem(start_chunk << PAGE_SHIFT, 541 (end_chunk - start_chunk) << PAGE_SHIFT); 542 if (last_rw_end < start_chunk) 543 add_memory_hole(last_rw_end, start_chunk - 1); 544 last_rw_end = end_chunk; 545 } 546 } 547 548 psw_set_key(PAGE_DEFAULT_KEY); 549 550 if (last_rw_end < end_pfn - 1) 551 add_memory_hole(last_rw_end, end_pfn - 1); 552 553 /* 554 * Reserve the bootmem bitmap itself as well. We do this in two 555 * steps (first step was init_bootmem()) because this catches 556 * the (very unlikely) case of us accidentally initializing the 557 * bootmem allocator with an invalid RAM area. 558 */ 559 reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); 560 561 #ifdef CONFIG_BLK_DEV_INITRD 562 if (INITRD_START) { 563 if (INITRD_START + INITRD_SIZE <= memory_end) { 564 reserve_bootmem(INITRD_START, INITRD_SIZE); 565 initrd_start = INITRD_START; 566 initrd_end = initrd_start + INITRD_SIZE; 567 } else { 568 printk("initrd extends beyond end of memory " 569 "(0x%08lx > 0x%08lx)\ndisabling initrd\n", 570 initrd_start + INITRD_SIZE, memory_end); 571 initrd_start = initrd_end = 0; 572 } 573 } 574 #endif 575 } 576 577 /* 578 * Setup function called from init/main.c just after the banner 579 * was printed. 580 */ 581 582 void __init 583 setup_arch(char **cmdline_p) 584 { 585 /* 586 * print what head.S has found out about the machine 587 */ 588 #ifndef CONFIG_64BIT 589 printk((MACHINE_IS_VM) ? 590 "We are running under VM (31 bit mode)\n" : 591 "We are running native (31 bit mode)\n"); 592 printk((MACHINE_HAS_IEEE) ? 593 "This machine has an IEEE fpu\n" : 594 "This machine has no IEEE fpu\n"); 595 #else /* CONFIG_64BIT */ 596 printk((MACHINE_IS_VM) ? 597 "We are running under VM (64 bit mode)\n" : 598 "We are running native (64 bit mode)\n"); 599 #endif /* CONFIG_64BIT */ 600 601 /* Save unparsed command line copy for /proc/cmdline */ 602 strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); 603 604 *cmdline_p = COMMAND_LINE; 605 *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0'; 606 607 ROOT_DEV = Root_RAM0; 608 609 init_mm.start_code = PAGE_OFFSET; 610 init_mm.end_code = (unsigned long) &_etext; 611 init_mm.end_data = (unsigned long) &_edata; 612 init_mm.brk = (unsigned long) &_end; 613 614 memory_end = memory_size; 615 616 parse_early_param(); 617 618 #ifndef CONFIG_64BIT 619 memory_end &= ~0x400000UL; 620 621 /* 622 * We need some free virtual space to be able to do vmalloc. 623 * On a machine with 2GB memory we make sure that we have at 624 * least 128 MB free space for vmalloc. 625 */ 626 if (memory_end > 1920*1024*1024) 627 memory_end = 1920*1024*1024; 628 #else /* CONFIG_64BIT */ 629 memory_end &= ~0x200000UL; 630 #endif /* CONFIG_64BIT */ 631 632 setup_memory(); 633 setup_resources(); 634 setup_lowcore(); 635 636 cpu_init(); 637 __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; 638 smp_setup_cpu_possible_map(); 639 640 /* 641 * Create kernel page tables and switch to virtual addressing. 642 */ 643 paging_init(); 644 645 /* Setup default console */ 646 conmode_default(); 647 } 648 649 void print_cpu_info(struct cpuinfo_S390 *cpuinfo) 650 { 651 printk("cpu %d " 652 #ifdef CONFIG_SMP 653 "phys_idx=%d " 654 #endif 655 "vers=%02X ident=%06X machine=%04X unused=%04X\n", 656 cpuinfo->cpu_nr, 657 #ifdef CONFIG_SMP 658 cpuinfo->cpu_addr, 659 #endif 660 cpuinfo->cpu_id.version, 661 cpuinfo->cpu_id.ident, 662 cpuinfo->cpu_id.machine, 663 cpuinfo->cpu_id.unused); 664 } 665 666 /* 667 * show_cpuinfo - Get information on one CPU for use by procfs. 668 */ 669 670 static int show_cpuinfo(struct seq_file *m, void *v) 671 { 672 struct cpuinfo_S390 *cpuinfo; 673 unsigned long n = (unsigned long) v - 1; 674 675 preempt_disable(); 676 if (!n) { 677 seq_printf(m, "vendor_id : IBM/S390\n" 678 "# processors : %i\n" 679 "bogomips per cpu: %lu.%02lu\n", 680 num_online_cpus(), loops_per_jiffy/(500000/HZ), 681 (loops_per_jiffy/(5000/HZ))%100); 682 } 683 if (cpu_online(n)) { 684 #ifdef CONFIG_SMP 685 if (smp_processor_id() == n) 686 cpuinfo = &S390_lowcore.cpu_data; 687 else 688 cpuinfo = &lowcore_ptr[n]->cpu_data; 689 #else 690 cpuinfo = &S390_lowcore.cpu_data; 691 #endif 692 seq_printf(m, "processor %li: " 693 "version = %02X, " 694 "identification = %06X, " 695 "machine = %04X\n", 696 n, cpuinfo->cpu_id.version, 697 cpuinfo->cpu_id.ident, 698 cpuinfo->cpu_id.machine); 699 } 700 preempt_enable(); 701 return 0; 702 } 703 704 static void *c_start(struct seq_file *m, loff_t *pos) 705 { 706 return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; 707 } 708 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 709 { 710 ++*pos; 711 return c_start(m, pos); 712 } 713 static void c_stop(struct seq_file *m, void *v) 714 { 715 } 716 struct seq_operations cpuinfo_op = { 717 .start = c_start, 718 .next = c_next, 719 .stop = c_stop, 720 .show = show_cpuinfo, 721 }; 722 723 #define DEFINE_IPL_ATTR(_name, _format, _value) \ 724 static ssize_t ipl_##_name##_show(struct subsystem *subsys, \ 725 char *page) \ 726 { \ 727 return sprintf(page, _format, _value); \ 728 } \ 729 static struct subsys_attribute ipl_##_name##_attr = \ 730 __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL); 731 732 DEFINE_IPL_ATTR(wwpn, "0x%016llx\n", (unsigned long long) 733 IPL_PARMBLOCK_START->fcp.wwpn); 734 DEFINE_IPL_ATTR(lun, "0x%016llx\n", (unsigned long long) 735 IPL_PARMBLOCK_START->fcp.lun); 736 DEFINE_IPL_ATTR(bootprog, "%lld\n", (unsigned long long) 737 IPL_PARMBLOCK_START->fcp.bootprog); 738 DEFINE_IPL_ATTR(br_lba, "%lld\n", (unsigned long long) 739 IPL_PARMBLOCK_START->fcp.br_lba); 740 741 enum ipl_type_type { 742 ipl_type_unknown, 743 ipl_type_ccw, 744 ipl_type_fcp, 745 }; 746 747 static enum ipl_type_type 748 get_ipl_type(void) 749 { 750 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 751 752 if (!IPL_DEVNO_VALID) 753 return ipl_type_unknown; 754 if (!IPL_PARMBLOCK_VALID) 755 return ipl_type_ccw; 756 if (ipl->hdr.header.version > IPL_MAX_SUPPORTED_VERSION) 757 return ipl_type_unknown; 758 if (ipl->fcp.pbt != IPL_TYPE_FCP) 759 return ipl_type_unknown; 760 return ipl_type_fcp; 761 } 762 763 static ssize_t 764 ipl_type_show(struct subsystem *subsys, char *page) 765 { 766 switch (get_ipl_type()) { 767 case ipl_type_ccw: 768 return sprintf(page, "ccw\n"); 769 case ipl_type_fcp: 770 return sprintf(page, "fcp\n"); 771 default: 772 return sprintf(page, "unknown\n"); 773 } 774 } 775 776 static struct subsys_attribute ipl_type_attr = __ATTR_RO(ipl_type); 777 778 static ssize_t 779 ipl_device_show(struct subsystem *subsys, char *page) 780 { 781 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 782 783 switch (get_ipl_type()) { 784 case ipl_type_ccw: 785 return sprintf(page, "0.0.%04x\n", ipl_devno); 786 case ipl_type_fcp: 787 return sprintf(page, "0.0.%04x\n", ipl->fcp.devno); 788 default: 789 return 0; 790 } 791 } 792 793 static struct subsys_attribute ipl_device_attr = 794 __ATTR(device, S_IRUGO, ipl_device_show, NULL); 795 796 static struct attribute *ipl_fcp_attrs[] = { 797 &ipl_type_attr.attr, 798 &ipl_device_attr.attr, 799 &ipl_wwpn_attr.attr, 800 &ipl_lun_attr.attr, 801 &ipl_bootprog_attr.attr, 802 &ipl_br_lba_attr.attr, 803 NULL, 804 }; 805 806 static struct attribute_group ipl_fcp_attr_group = { 807 .attrs = ipl_fcp_attrs, 808 }; 809 810 static struct attribute *ipl_ccw_attrs[] = { 811 &ipl_type_attr.attr, 812 &ipl_device_attr.attr, 813 NULL, 814 }; 815 816 static struct attribute_group ipl_ccw_attr_group = { 817 .attrs = ipl_ccw_attrs, 818 }; 819 820 static struct attribute *ipl_unknown_attrs[] = { 821 &ipl_type_attr.attr, 822 NULL, 823 }; 824 825 static struct attribute_group ipl_unknown_attr_group = { 826 .attrs = ipl_unknown_attrs, 827 }; 828 829 static ssize_t 830 ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, size_t count) 831 { 832 unsigned int size = IPL_PARMBLOCK_SIZE; 833 834 if (off > size) 835 return 0; 836 if (off + count > size) 837 count = size - off; 838 839 memcpy(buf, (void *) IPL_PARMBLOCK_START + off, count); 840 return count; 841 } 842 843 static struct bin_attribute ipl_parameter_attr = { 844 .attr = { 845 .name = "binary_parameter", 846 .mode = S_IRUGO, 847 .owner = THIS_MODULE, 848 }, 849 .size = PAGE_SIZE, 850 .read = &ipl_parameter_read, 851 }; 852 853 static ssize_t 854 ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, size_t count) 855 { 856 unsigned int size = IPL_PARMBLOCK_START->fcp.scp_data_len; 857 void *scp_data = &IPL_PARMBLOCK_START->fcp.scp_data; 858 859 if (off > size) 860 return 0; 861 if (off + count > size) 862 count = size - off; 863 864 memcpy(buf, scp_data + off, count); 865 return count; 866 } 867 868 static struct bin_attribute ipl_scp_data_attr = { 869 .attr = { 870 .name = "scp_data", 871 .mode = S_IRUGO, 872 .owner = THIS_MODULE, 873 }, 874 .size = PAGE_SIZE, 875 .read = &ipl_scp_data_read, 876 }; 877 878 static decl_subsys(ipl, NULL, NULL); 879 880 static int ipl_register_fcp_files(void) 881 { 882 int rc; 883 884 rc = sysfs_create_group(&ipl_subsys.kset.kobj, 885 &ipl_fcp_attr_group); 886 if (rc) 887 goto out; 888 rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj, 889 &ipl_parameter_attr); 890 if (rc) 891 goto out_ipl_parm; 892 rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj, 893 &ipl_scp_data_attr); 894 if (!rc) 895 goto out; 896 897 sysfs_remove_bin_file(&ipl_subsys.kset.kobj, &ipl_parameter_attr); 898 899 out_ipl_parm: 900 sysfs_remove_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group); 901 out: 902 return rc; 903 } 904 905 static int __init 906 ipl_device_sysfs_register(void) { 907 int rc; 908 909 rc = firmware_register(&ipl_subsys); 910 if (rc) 911 goto out; 912 913 switch (get_ipl_type()) { 914 case ipl_type_ccw: 915 rc = sysfs_create_group(&ipl_subsys.kset.kobj, 916 &ipl_ccw_attr_group); 917 break; 918 case ipl_type_fcp: 919 rc = ipl_register_fcp_files(); 920 break; 921 default: 922 rc = sysfs_create_group(&ipl_subsys.kset.kobj, 923 &ipl_unknown_attr_group); 924 break; 925 } 926 927 if (rc) 928 firmware_unregister(&ipl_subsys); 929 out: 930 return rc; 931 } 932 933 __initcall(ipl_device_sysfs_register); 934