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); 863