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 #include <linux/notifier.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 * Machine setup.. 55 */ 56 unsigned int console_mode = 0; 57 unsigned int console_devno = -1; 58 unsigned int console_irq = -1; 59 unsigned long memory_size = 0; 60 unsigned long machine_flags = 0; 61 struct { 62 unsigned long addr, size, type; 63 } memory_chunk[MEMORY_CHUNKS] = { { 0 } }; 64 #define CHUNK_READ_WRITE 0 65 #define CHUNK_READ_ONLY 1 66 volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */ 67 unsigned long __initdata zholes_size[MAX_NR_ZONES]; 68 static unsigned long __initdata memory_end; 69 70 /* 71 * This is set up by the setup-routine at boot-time 72 * for S390 need to find out, what we have to setup 73 * using address 0x10400 ... 74 */ 75 76 #include <asm/setup.h> 77 78 static struct resource code_resource = { 79 .name = "Kernel code", 80 .flags = IORESOURCE_BUSY | IORESOURCE_MEM, 81 }; 82 83 static struct resource data_resource = { 84 .name = "Kernel data", 85 .flags = IORESOURCE_BUSY | IORESOURCE_MEM, 86 }; 87 88 /* 89 * cpu_init() initializes state that is per-CPU. 90 */ 91 void __devinit cpu_init (void) 92 { 93 int addr = hard_smp_processor_id(); 94 95 /* 96 * Store processor id in lowcore (used e.g. in timer_interrupt) 97 */ 98 asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id)); 99 S390_lowcore.cpu_data.cpu_addr = addr; 100 101 /* 102 * Force FPU initialization: 103 */ 104 clear_thread_flag(TIF_USEDFPU); 105 clear_used_math(); 106 107 atomic_inc(&init_mm.mm_count); 108 current->active_mm = &init_mm; 109 if (current->mm) 110 BUG(); 111 enter_lazy_tlb(&init_mm, current); 112 } 113 114 /* 115 * VM halt and poweroff setup routines 116 */ 117 char vmhalt_cmd[128] = ""; 118 char vmpoff_cmd[128] = ""; 119 char vmpanic_cmd[128] = ""; 120 121 static inline void strncpy_skip_quote(char *dst, char *src, int n) 122 { 123 int sx, dx; 124 125 dx = 0; 126 for (sx = 0; src[sx] != 0; sx++) { 127 if (src[sx] == '"') continue; 128 dst[dx++] = src[sx]; 129 if (dx >= n) break; 130 } 131 } 132 133 static int __init vmhalt_setup(char *str) 134 { 135 strncpy_skip_quote(vmhalt_cmd, str, 127); 136 vmhalt_cmd[127] = 0; 137 return 1; 138 } 139 140 __setup("vmhalt=", vmhalt_setup); 141 142 static int __init vmpoff_setup(char *str) 143 { 144 strncpy_skip_quote(vmpoff_cmd, str, 127); 145 vmpoff_cmd[127] = 0; 146 return 1; 147 } 148 149 __setup("vmpoff=", vmpoff_setup); 150 151 static int vmpanic_notify(struct notifier_block *self, unsigned long event, 152 void *data) 153 { 154 if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0) 155 cpcmd(vmpanic_cmd, NULL, 0, NULL); 156 157 return NOTIFY_OK; 158 } 159 160 #define PANIC_PRI_VMPANIC 0 161 162 static struct notifier_block vmpanic_nb = { 163 .notifier_call = vmpanic_notify, 164 .priority = PANIC_PRI_VMPANIC 165 }; 166 167 static int __init vmpanic_setup(char *str) 168 { 169 static int register_done __initdata = 0; 170 171 strncpy_skip_quote(vmpanic_cmd, str, 127); 172 vmpanic_cmd[127] = 0; 173 if (!register_done) { 174 register_done = 1; 175 atomic_notifier_chain_register(&panic_notifier_list, 176 &vmpanic_nb); 177 } 178 return 1; 179 } 180 181 __setup("vmpanic=", vmpanic_setup); 182 183 /* 184 * condev= and conmode= setup parameter. 185 */ 186 187 static int __init condev_setup(char *str) 188 { 189 int vdev; 190 191 vdev = simple_strtoul(str, &str, 0); 192 if (vdev >= 0 && vdev < 65536) { 193 console_devno = vdev; 194 console_irq = -1; 195 } 196 return 1; 197 } 198 199 __setup("condev=", condev_setup); 200 201 static int __init conmode_setup(char *str) 202 { 203 #if defined(CONFIG_SCLP_CONSOLE) 204 if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0) 205 SET_CONSOLE_SCLP; 206 #endif 207 #if defined(CONFIG_TN3215_CONSOLE) 208 if (strncmp(str, "3215", 5) == 0) 209 SET_CONSOLE_3215; 210 #endif 211 #if defined(CONFIG_TN3270_CONSOLE) 212 if (strncmp(str, "3270", 5) == 0) 213 SET_CONSOLE_3270; 214 #endif 215 return 1; 216 } 217 218 __setup("conmode=", conmode_setup); 219 220 static void __init conmode_default(void) 221 { 222 char query_buffer[1024]; 223 char *ptr; 224 225 if (MACHINE_IS_VM) { 226 __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL); 227 console_devno = simple_strtoul(query_buffer + 5, NULL, 16); 228 ptr = strstr(query_buffer, "SUBCHANNEL ="); 229 console_irq = simple_strtoul(ptr + 13, NULL, 16); 230 __cpcmd("QUERY TERM", query_buffer, 1024, NULL); 231 ptr = strstr(query_buffer, "CONMODE"); 232 /* 233 * Set the conmode to 3215 so that the device recognition 234 * will set the cu_type of the console to 3215. If the 235 * conmode is 3270 and we don't set it back then both 236 * 3215 and the 3270 driver will try to access the console 237 * device (3215 as console and 3270 as normal tty). 238 */ 239 __cpcmd("TERM CONMODE 3215", NULL, 0, NULL); 240 if (ptr == NULL) { 241 #if defined(CONFIG_SCLP_CONSOLE) 242 SET_CONSOLE_SCLP; 243 #endif 244 return; 245 } 246 if (strncmp(ptr + 8, "3270", 4) == 0) { 247 #if defined(CONFIG_TN3270_CONSOLE) 248 SET_CONSOLE_3270; 249 #elif defined(CONFIG_TN3215_CONSOLE) 250 SET_CONSOLE_3215; 251 #elif defined(CONFIG_SCLP_CONSOLE) 252 SET_CONSOLE_SCLP; 253 #endif 254 } else if (strncmp(ptr + 8, "3215", 4) == 0) { 255 #if defined(CONFIG_TN3215_CONSOLE) 256 SET_CONSOLE_3215; 257 #elif defined(CONFIG_TN3270_CONSOLE) 258 SET_CONSOLE_3270; 259 #elif defined(CONFIG_SCLP_CONSOLE) 260 SET_CONSOLE_SCLP; 261 #endif 262 } 263 } else if (MACHINE_IS_P390) { 264 #if defined(CONFIG_TN3215_CONSOLE) 265 SET_CONSOLE_3215; 266 #elif defined(CONFIG_TN3270_CONSOLE) 267 SET_CONSOLE_3270; 268 #endif 269 } else { 270 #if defined(CONFIG_SCLP_CONSOLE) 271 SET_CONSOLE_SCLP; 272 #endif 273 } 274 } 275 276 #ifdef CONFIG_SMP 277 extern void machine_restart_smp(char *); 278 extern void machine_halt_smp(void); 279 extern void machine_power_off_smp(void); 280 281 void (*_machine_restart)(char *command) = machine_restart_smp; 282 void (*_machine_halt)(void) = machine_halt_smp; 283 void (*_machine_power_off)(void) = machine_power_off_smp; 284 #else 285 /* 286 * Reboot, halt and power_off routines for non SMP. 287 */ 288 extern void reipl(unsigned long devno); 289 extern void reipl_diag(void); 290 static void do_machine_restart_nonsmp(char * __unused) 291 { 292 reipl_diag(); 293 294 if (MACHINE_IS_VM) 295 cpcmd ("IPL", NULL, 0, NULL); 296 else 297 reipl (0x10000 | S390_lowcore.ipl_device); 298 } 299 300 static void do_machine_halt_nonsmp(void) 301 { 302 if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) 303 cpcmd(vmhalt_cmd, NULL, 0, NULL); 304 signal_processor(smp_processor_id(), sigp_stop_and_store_status); 305 } 306 307 static void do_machine_power_off_nonsmp(void) 308 { 309 if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) 310 cpcmd(vmpoff_cmd, NULL, 0, NULL); 311 signal_processor(smp_processor_id(), sigp_stop_and_store_status); 312 } 313 314 void (*_machine_restart)(char *command) = do_machine_restart_nonsmp; 315 void (*_machine_halt)(void) = do_machine_halt_nonsmp; 316 void (*_machine_power_off)(void) = do_machine_power_off_nonsmp; 317 #endif 318 319 /* 320 * Reboot, halt and power_off stubs. They just call _machine_restart, 321 * _machine_halt or _machine_power_off. 322 */ 323 324 void machine_restart(char *command) 325 { 326 if (!in_interrupt() || oops_in_progress) 327 /* 328 * Only unblank the console if we are called in enabled 329 * context or a bust_spinlocks cleared the way for us. 330 */ 331 console_unblank(); 332 _machine_restart(command); 333 } 334 335 void machine_halt(void) 336 { 337 if (!in_interrupt() || oops_in_progress) 338 /* 339 * Only unblank the console if we are called in enabled 340 * context or a bust_spinlocks cleared the way for us. 341 */ 342 console_unblank(); 343 _machine_halt(); 344 } 345 346 void machine_power_off(void) 347 { 348 if (!in_interrupt() || oops_in_progress) 349 /* 350 * Only unblank the console if we are called in enabled 351 * context or a bust_spinlocks cleared the way for us. 352 */ 353 console_unblank(); 354 _machine_power_off(); 355 } 356 357 /* 358 * Dummy power off function. 359 */ 360 void (*pm_power_off)(void) = machine_power_off; 361 362 static void __init 363 add_memory_hole(unsigned long start, unsigned long end) 364 { 365 unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT; 366 367 if (end <= dma_pfn) 368 zholes_size[ZONE_DMA] += end - start + 1; 369 else if (start > dma_pfn) 370 zholes_size[ZONE_NORMAL] += end - start + 1; 371 else { 372 zholes_size[ZONE_DMA] += dma_pfn - start + 1; 373 zholes_size[ZONE_NORMAL] += end - dma_pfn; 374 } 375 } 376 377 static int __init early_parse_mem(char *p) 378 { 379 memory_end = memparse(p, &p); 380 return 0; 381 } 382 early_param("mem", early_parse_mem); 383 384 /* 385 * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes 386 */ 387 static int __init early_parse_ipldelay(char *p) 388 { 389 unsigned long delay = 0; 390 391 delay = simple_strtoul(p, &p, 0); 392 393 switch (*p) { 394 case 's': 395 case 'S': 396 delay *= 1000000; 397 break; 398 case 'm': 399 case 'M': 400 delay *= 60 * 1000000; 401 } 402 403 /* now wait for the requested amount of time */ 404 udelay(delay); 405 406 return 0; 407 } 408 early_param("ipldelay", early_parse_ipldelay); 409 410 static void __init 411 setup_lowcore(void) 412 { 413 struct _lowcore *lc; 414 int lc_pages; 415 416 /* 417 * Setup lowcore for boot cpu 418 */ 419 lc_pages = sizeof(void *) == 8 ? 2 : 1; 420 lc = (struct _lowcore *) 421 __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0); 422 memset(lc, 0, lc_pages * PAGE_SIZE); 423 lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; 424 lc->restart_psw.addr = 425 PSW_ADDR_AMODE | (unsigned long) restart_int_handler; 426 lc->external_new_psw.mask = PSW_KERNEL_BITS; 427 lc->external_new_psw.addr = 428 PSW_ADDR_AMODE | (unsigned long) ext_int_handler; 429 lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT; 430 lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call; 431 lc->program_new_psw.mask = PSW_KERNEL_BITS; 432 lc->program_new_psw.addr = 433 PSW_ADDR_AMODE | (unsigned long)pgm_check_handler; 434 lc->mcck_new_psw.mask = 435 PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT; 436 lc->mcck_new_psw.addr = 437 PSW_ADDR_AMODE | (unsigned long) mcck_int_handler; 438 lc->io_new_psw.mask = PSW_KERNEL_BITS; 439 lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; 440 lc->ipl_device = S390_lowcore.ipl_device; 441 lc->jiffy_timer = -1LL; 442 lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; 443 lc->async_stack = (unsigned long) 444 __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; 445 lc->panic_stack = (unsigned long) 446 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE; 447 lc->current_task = (unsigned long) init_thread_union.thread_info.task; 448 lc->thread_info = (unsigned long) &init_thread_union; 449 #ifndef CONFIG_64BIT 450 if (MACHINE_HAS_IEEE) { 451 lc->extended_save_area_addr = (__u32) 452 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0); 453 /* enable extended save area */ 454 ctl_set_bit(14, 29); 455 } 456 #endif 457 set_prefix((u32)(unsigned long) lc); 458 } 459 460 static void __init 461 setup_resources(void) 462 { 463 struct resource *res; 464 int i; 465 466 code_resource.start = (unsigned long) &_text; 467 code_resource.end = (unsigned long) &_etext - 1; 468 data_resource.start = (unsigned long) &_etext; 469 data_resource.end = (unsigned long) &_edata - 1; 470 471 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { 472 res = alloc_bootmem_low(sizeof(struct resource)); 473 res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; 474 switch (memory_chunk[i].type) { 475 case CHUNK_READ_WRITE: 476 res->name = "System RAM"; 477 break; 478 case CHUNK_READ_ONLY: 479 res->name = "System ROM"; 480 res->flags |= IORESOURCE_READONLY; 481 break; 482 default: 483 res->name = "reserved"; 484 } 485 res->start = memory_chunk[i].addr; 486 res->end = memory_chunk[i].addr + memory_chunk[i].size - 1; 487 request_resource(&iomem_resource, res); 488 request_resource(res, &code_resource); 489 request_resource(res, &data_resource); 490 } 491 } 492 493 static void __init 494 setup_memory(void) 495 { 496 unsigned long bootmap_size; 497 unsigned long start_pfn, end_pfn, init_pfn; 498 unsigned long last_rw_end; 499 int i; 500 501 /* 502 * partially used pages are not usable - thus 503 * we are rounding upwards: 504 */ 505 start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT; 506 end_pfn = max_pfn = memory_end >> PAGE_SHIFT; 507 508 /* Initialize storage key for kernel pages */ 509 for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++) 510 page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY); 511 512 /* 513 * Initialize the boot-time allocator (with low memory only): 514 */ 515 bootmap_size = init_bootmem(start_pfn, end_pfn); 516 517 /* 518 * Register RAM areas with the bootmem allocator. 519 */ 520 last_rw_end = start_pfn; 521 522 for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { 523 unsigned long start_chunk, end_chunk; 524 525 if (memory_chunk[i].type != CHUNK_READ_WRITE) 526 continue; 527 start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1); 528 start_chunk >>= PAGE_SHIFT; 529 end_chunk = (memory_chunk[i].addr + memory_chunk[i].size); 530 end_chunk >>= PAGE_SHIFT; 531 if (start_chunk < start_pfn) 532 start_chunk = start_pfn; 533 if (end_chunk > end_pfn) 534 end_chunk = end_pfn; 535 if (start_chunk < end_chunk) { 536 /* Initialize storage key for RAM pages */ 537 for (init_pfn = start_chunk ; init_pfn < end_chunk; 538 init_pfn++) 539 page_set_storage_key(init_pfn << PAGE_SHIFT, 540 PAGE_DEFAULT_KEY); 541 free_bootmem(start_chunk << PAGE_SHIFT, 542 (end_chunk - start_chunk) << PAGE_SHIFT); 543 if (last_rw_end < start_chunk) 544 add_memory_hole(last_rw_end, start_chunk - 1); 545 last_rw_end = end_chunk; 546 } 547 } 548 549 psw_set_key(PAGE_DEFAULT_KEY); 550 551 if (last_rw_end < end_pfn - 1) 552 add_memory_hole(last_rw_end, end_pfn - 1); 553 554 /* 555 * Reserve the bootmem bitmap itself as well. We do this in two 556 * steps (first step was init_bootmem()) because this catches 557 * the (very unlikely) case of us accidentally initializing the 558 * bootmem allocator with an invalid RAM area. 559 */ 560 reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size); 561 562 #ifdef CONFIG_BLK_DEV_INITRD 563 if (INITRD_START) { 564 if (INITRD_START + INITRD_SIZE <= memory_end) { 565 reserve_bootmem(INITRD_START, INITRD_SIZE); 566 initrd_start = INITRD_START; 567 initrd_end = initrd_start + INITRD_SIZE; 568 } else { 569 printk("initrd extends beyond end of memory " 570 "(0x%08lx > 0x%08lx)\ndisabling initrd\n", 571 initrd_start + INITRD_SIZE, memory_end); 572 initrd_start = initrd_end = 0; 573 } 574 } 575 #endif 576 } 577 578 /* 579 * Setup function called from init/main.c just after the banner 580 * was printed. 581 */ 582 583 void __init 584 setup_arch(char **cmdline_p) 585 { 586 /* 587 * print what head.S has found out about the machine 588 */ 589 #ifndef CONFIG_64BIT 590 printk((MACHINE_IS_VM) ? 591 "We are running under VM (31 bit mode)\n" : 592 "We are running native (31 bit mode)\n"); 593 printk((MACHINE_HAS_IEEE) ? 594 "This machine has an IEEE fpu\n" : 595 "This machine has no IEEE fpu\n"); 596 #else /* CONFIG_64BIT */ 597 printk((MACHINE_IS_VM) ? 598 "We are running under VM (64 bit mode)\n" : 599 "We are running native (64 bit mode)\n"); 600 #endif /* CONFIG_64BIT */ 601 602 /* Save unparsed command line copy for /proc/cmdline */ 603 strlcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); 604 605 *cmdline_p = COMMAND_LINE; 606 *(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0'; 607 608 ROOT_DEV = Root_RAM0; 609 610 init_mm.start_code = PAGE_OFFSET; 611 init_mm.end_code = (unsigned long) &_etext; 612 init_mm.end_data = (unsigned long) &_edata; 613 init_mm.brk = (unsigned long) &_end; 614 615 memory_end = memory_size; 616 617 parse_early_param(); 618 619 #ifndef CONFIG_64BIT 620 memory_end &= ~0x400000UL; 621 622 /* 623 * We need some free virtual space to be able to do vmalloc. 624 * On a machine with 2GB memory we make sure that we have at 625 * least 128 MB free space for vmalloc. 626 */ 627 if (memory_end > 1920*1024*1024) 628 memory_end = 1920*1024*1024; 629 #else /* CONFIG_64BIT */ 630 memory_end &= ~0x200000UL; 631 #endif /* CONFIG_64BIT */ 632 633 setup_memory(); 634 setup_resources(); 635 setup_lowcore(); 636 637 cpu_init(); 638 __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; 639 smp_setup_cpu_possible_map(); 640 641 /* 642 * Create kernel page tables and switch to virtual addressing. 643 */ 644 paging_init(); 645 646 /* Setup default console */ 647 conmode_default(); 648 } 649 650 void print_cpu_info(struct cpuinfo_S390 *cpuinfo) 651 { 652 printk("cpu %d " 653 #ifdef CONFIG_SMP 654 "phys_idx=%d " 655 #endif 656 "vers=%02X ident=%06X machine=%04X unused=%04X\n", 657 cpuinfo->cpu_nr, 658 #ifdef CONFIG_SMP 659 cpuinfo->cpu_addr, 660 #endif 661 cpuinfo->cpu_id.version, 662 cpuinfo->cpu_id.ident, 663 cpuinfo->cpu_id.machine, 664 cpuinfo->cpu_id.unused); 665 } 666 667 /* 668 * show_cpuinfo - Get information on one CPU for use by procfs. 669 */ 670 671 static int show_cpuinfo(struct seq_file *m, void *v) 672 { 673 struct cpuinfo_S390 *cpuinfo; 674 unsigned long n = (unsigned long) v - 1; 675 676 preempt_disable(); 677 if (!n) { 678 seq_printf(m, "vendor_id : IBM/S390\n" 679 "# processors : %i\n" 680 "bogomips per cpu: %lu.%02lu\n", 681 num_online_cpus(), loops_per_jiffy/(500000/HZ), 682 (loops_per_jiffy/(5000/HZ))%100); 683 } 684 if (cpu_online(n)) { 685 #ifdef CONFIG_SMP 686 if (smp_processor_id() == n) 687 cpuinfo = &S390_lowcore.cpu_data; 688 else 689 cpuinfo = &lowcore_ptr[n]->cpu_data; 690 #else 691 cpuinfo = &S390_lowcore.cpu_data; 692 #endif 693 seq_printf(m, "processor %li: " 694 "version = %02X, " 695 "identification = %06X, " 696 "machine = %04X\n", 697 n, cpuinfo->cpu_id.version, 698 cpuinfo->cpu_id.ident, 699 cpuinfo->cpu_id.machine); 700 } 701 preempt_enable(); 702 return 0; 703 } 704 705 static void *c_start(struct seq_file *m, loff_t *pos) 706 { 707 return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL; 708 } 709 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 710 { 711 ++*pos; 712 return c_start(m, pos); 713 } 714 static void c_stop(struct seq_file *m, void *v) 715 { 716 } 717 struct seq_operations cpuinfo_op = { 718 .start = c_start, 719 .next = c_next, 720 .stop = c_stop, 721 .show = show_cpuinfo, 722 }; 723 724 #define DEFINE_IPL_ATTR(_name, _format, _value) \ 725 static ssize_t ipl_##_name##_show(struct subsystem *subsys, \ 726 char *page) \ 727 { \ 728 return sprintf(page, _format, _value); \ 729 } \ 730 static struct subsys_attribute ipl_##_name##_attr = \ 731 __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL); 732 733 DEFINE_IPL_ATTR(wwpn, "0x%016llx\n", (unsigned long long) 734 IPL_PARMBLOCK_START->fcp.wwpn); 735 DEFINE_IPL_ATTR(lun, "0x%016llx\n", (unsigned long long) 736 IPL_PARMBLOCK_START->fcp.lun); 737 DEFINE_IPL_ATTR(bootprog, "%lld\n", (unsigned long long) 738 IPL_PARMBLOCK_START->fcp.bootprog); 739 DEFINE_IPL_ATTR(br_lba, "%lld\n", (unsigned long long) 740 IPL_PARMBLOCK_START->fcp.br_lba); 741 742 enum ipl_type_type { 743 ipl_type_unknown, 744 ipl_type_ccw, 745 ipl_type_fcp, 746 }; 747 748 static enum ipl_type_type 749 get_ipl_type(void) 750 { 751 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 752 753 if (!IPL_DEVNO_VALID) 754 return ipl_type_unknown; 755 if (!IPL_PARMBLOCK_VALID) 756 return ipl_type_ccw; 757 if (ipl->hdr.header.version > IPL_MAX_SUPPORTED_VERSION) 758 return ipl_type_unknown; 759 if (ipl->fcp.pbt != IPL_TYPE_FCP) 760 return ipl_type_unknown; 761 return ipl_type_fcp; 762 } 763 764 static ssize_t 765 ipl_type_show(struct subsystem *subsys, char *page) 766 { 767 switch (get_ipl_type()) { 768 case ipl_type_ccw: 769 return sprintf(page, "ccw\n"); 770 case ipl_type_fcp: 771 return sprintf(page, "fcp\n"); 772 default: 773 return sprintf(page, "unknown\n"); 774 } 775 } 776 777 static struct subsys_attribute ipl_type_attr = __ATTR_RO(ipl_type); 778 779 static ssize_t 780 ipl_device_show(struct subsystem *subsys, char *page) 781 { 782 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 783 784 switch (get_ipl_type()) { 785 case ipl_type_ccw: 786 return sprintf(page, "0.0.%04x\n", ipl_devno); 787 case ipl_type_fcp: 788 return sprintf(page, "0.0.%04x\n", ipl->fcp.devno); 789 default: 790 return 0; 791 } 792 } 793 794 static struct subsys_attribute ipl_device_attr = 795 __ATTR(device, S_IRUGO, ipl_device_show, NULL); 796 797 static struct attribute *ipl_fcp_attrs[] = { 798 &ipl_type_attr.attr, 799 &ipl_device_attr.attr, 800 &ipl_wwpn_attr.attr, 801 &ipl_lun_attr.attr, 802 &ipl_bootprog_attr.attr, 803 &ipl_br_lba_attr.attr, 804 NULL, 805 }; 806 807 static struct attribute_group ipl_fcp_attr_group = { 808 .attrs = ipl_fcp_attrs, 809 }; 810 811 static struct attribute *ipl_ccw_attrs[] = { 812 &ipl_type_attr.attr, 813 &ipl_device_attr.attr, 814 NULL, 815 }; 816 817 static struct attribute_group ipl_ccw_attr_group = { 818 .attrs = ipl_ccw_attrs, 819 }; 820 821 static struct attribute *ipl_unknown_attrs[] = { 822 &ipl_type_attr.attr, 823 NULL, 824 }; 825 826 static struct attribute_group ipl_unknown_attr_group = { 827 .attrs = ipl_unknown_attrs, 828 }; 829 830 static ssize_t 831 ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, size_t count) 832 { 833 unsigned int size = IPL_PARMBLOCK_SIZE; 834 835 if (off > size) 836 return 0; 837 if (off + count > size) 838 count = size - off; 839 840 memcpy(buf, (void *) IPL_PARMBLOCK_START + off, count); 841 return count; 842 } 843 844 static struct bin_attribute ipl_parameter_attr = { 845 .attr = { 846 .name = "binary_parameter", 847 .mode = S_IRUGO, 848 .owner = THIS_MODULE, 849 }, 850 .size = PAGE_SIZE, 851 .read = &ipl_parameter_read, 852 }; 853 854 static ssize_t 855 ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, size_t count) 856 { 857 unsigned int size = IPL_PARMBLOCK_START->fcp.scp_data_len; 858 void *scp_data = &IPL_PARMBLOCK_START->fcp.scp_data; 859 860 if (off > size) 861 return 0; 862 if (off + count > size) 863 count = size - off; 864 865 memcpy(buf, scp_data + off, count); 866 return count; 867 } 868 869 static struct bin_attribute ipl_scp_data_attr = { 870 .attr = { 871 .name = "scp_data", 872 .mode = S_IRUGO, 873 .owner = THIS_MODULE, 874 }, 875 .size = PAGE_SIZE, 876 .read = &ipl_scp_data_read, 877 }; 878 879 static decl_subsys(ipl, NULL, NULL); 880 881 static int __init 882 ipl_device_sysfs_register(void) { 883 int rc; 884 885 rc = firmware_register(&ipl_subsys); 886 if (rc) 887 return rc; 888 889 switch (get_ipl_type()) { 890 case ipl_type_ccw: 891 sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_ccw_attr_group); 892 break; 893 case ipl_type_fcp: 894 sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group); 895 sysfs_create_bin_file(&ipl_subsys.kset.kobj, 896 &ipl_parameter_attr); 897 sysfs_create_bin_file(&ipl_subsys.kset.kobj, 898 &ipl_scp_data_attr); 899 break; 900 default: 901 sysfs_create_group(&ipl_subsys.kset.kobj, 902 &ipl_unknown_attr_group); 903 break; 904 } 905 return 0; 906 } 907 908 __initcall(ipl_device_sysfs_register); 909