1 /* 2 * 64-bit pSeries and RS/6000 setup code. 3 * 4 * Copyright (C) 1995 Linus Torvalds 5 * Adapted from 'alpha' version by Gary Thomas 6 * Modified by Cort Dougan (cort@cs.nmt.edu) 7 * Modified by PPC64 Team, IBM Corp 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 */ 14 15 /* 16 * bootup setup stuff.. 17 */ 18 19 #include <linux/cpu.h> 20 #include <linux/errno.h> 21 #include <linux/sched.h> 22 #include <linux/kernel.h> 23 #include <linux/mm.h> 24 #include <linux/stddef.h> 25 #include <linux/unistd.h> 26 #include <linux/user.h> 27 #include <linux/tty.h> 28 #include <linux/major.h> 29 #include <linux/interrupt.h> 30 #include <linux/reboot.h> 31 #include <linux/init.h> 32 #include <linux/ioport.h> 33 #include <linux/console.h> 34 #include <linux/pci.h> 35 #include <linux/utsname.h> 36 #include <linux/adb.h> 37 #include <linux/export.h> 38 #include <linux/delay.h> 39 #include <linux/irq.h> 40 #include <linux/seq_file.h> 41 #include <linux/root_dev.h> 42 #include <linux/of.h> 43 #include <linux/of_pci.h> 44 #include <linux/kexec.h> 45 46 #include <asm/mmu.h> 47 #include <asm/processor.h> 48 #include <asm/io.h> 49 #include <asm/pgtable.h> 50 #include <asm/prom.h> 51 #include <asm/rtas.h> 52 #include <asm/pci-bridge.h> 53 #include <asm/iommu.h> 54 #include <asm/dma.h> 55 #include <asm/machdep.h> 56 #include <asm/irq.h> 57 #include <asm/time.h> 58 #include <asm/nvram.h> 59 #include <asm/pmc.h> 60 #include <asm/xics.h> 61 #include <asm/ppc-pci.h> 62 #include <asm/i8259.h> 63 #include <asm/udbg.h> 64 #include <asm/smp.h> 65 #include <asm/firmware.h> 66 #include <asm/eeh.h> 67 #include <asm/reg.h> 68 #include <asm/plpar_wrappers.h> 69 70 #include "pseries.h" 71 72 int CMO_PrPSP = -1; 73 int CMO_SecPSP = -1; 74 unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K); 75 EXPORT_SYMBOL(CMO_PageSize); 76 77 int fwnmi_active; /* TRUE if an FWNMI handler is present */ 78 79 static void pSeries_show_cpuinfo(struct seq_file *m) 80 { 81 struct device_node *root; 82 const char *model = ""; 83 84 root = of_find_node_by_path("/"); 85 if (root) 86 model = of_get_property(root, "model", NULL); 87 seq_printf(m, "machine\t\t: CHRP %s\n", model); 88 of_node_put(root); 89 } 90 91 /* Initialize firmware assisted non-maskable interrupts if 92 * the firmware supports this feature. 93 */ 94 static void __init fwnmi_init(void) 95 { 96 unsigned long system_reset_addr, machine_check_addr; 97 98 int ibm_nmi_register = rtas_token("ibm,nmi-register"); 99 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE) 100 return; 101 102 /* If the kernel's not linked at zero we point the firmware at low 103 * addresses anyway, and use a trampoline to get to the real code. */ 104 system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START; 105 machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START; 106 107 if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr, 108 machine_check_addr)) 109 fwnmi_active = 1; 110 } 111 112 static void pseries_8259_cascade(struct irq_desc *desc) 113 { 114 struct irq_chip *chip = irq_desc_get_chip(desc); 115 unsigned int cascade_irq = i8259_irq(); 116 117 if (cascade_irq != NO_IRQ) 118 generic_handle_irq(cascade_irq); 119 120 chip->irq_eoi(&desc->irq_data); 121 } 122 123 static void __init pseries_setup_i8259_cascade(void) 124 { 125 struct device_node *np, *old, *found = NULL; 126 unsigned int cascade; 127 const u32 *addrp; 128 unsigned long intack = 0; 129 int naddr; 130 131 for_each_node_by_type(np, "interrupt-controller") { 132 if (of_device_is_compatible(np, "chrp,iic")) { 133 found = np; 134 break; 135 } 136 } 137 138 if (found == NULL) { 139 printk(KERN_DEBUG "pic: no ISA interrupt controller\n"); 140 return; 141 } 142 143 cascade = irq_of_parse_and_map(found, 0); 144 if (cascade == NO_IRQ) { 145 printk(KERN_ERR "pic: failed to map cascade interrupt"); 146 return; 147 } 148 pr_debug("pic: cascade mapped to irq %d\n", cascade); 149 150 for (old = of_node_get(found); old != NULL ; old = np) { 151 np = of_get_parent(old); 152 of_node_put(old); 153 if (np == NULL) 154 break; 155 if (strcmp(np->name, "pci") != 0) 156 continue; 157 addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL); 158 if (addrp == NULL) 159 continue; 160 naddr = of_n_addr_cells(np); 161 intack = addrp[naddr-1]; 162 if (naddr > 1) 163 intack |= ((unsigned long)addrp[naddr-2]) << 32; 164 } 165 if (intack) 166 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack); 167 i8259_init(found, intack); 168 of_node_put(found); 169 irq_set_chained_handler(cascade, pseries_8259_cascade); 170 } 171 172 static void __init pseries_init_irq(void) 173 { 174 xics_init(); 175 pseries_setup_i8259_cascade(); 176 } 177 178 static void pseries_lpar_enable_pmcs(void) 179 { 180 unsigned long set, reset; 181 182 set = 1UL << 63; 183 reset = 0; 184 plpar_hcall_norets(H_PERFMON, set, reset); 185 } 186 187 static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data) 188 { 189 struct of_reconfig_data *rd = data; 190 struct device_node *parent, *np = rd->dn; 191 struct pci_dn *pdn; 192 int err = NOTIFY_OK; 193 194 switch (action) { 195 case OF_RECONFIG_ATTACH_NODE: 196 parent = of_get_parent(np); 197 pdn = parent ? PCI_DN(parent) : NULL; 198 if (pdn) 199 pci_add_device_node_info(pdn->phb, np); 200 201 of_node_put(parent); 202 break; 203 case OF_RECONFIG_DETACH_NODE: 204 pdn = PCI_DN(np); 205 if (pdn) 206 list_del(&pdn->list); 207 break; 208 default: 209 err = NOTIFY_DONE; 210 break; 211 } 212 return err; 213 } 214 215 static struct notifier_block pci_dn_reconfig_nb = { 216 .notifier_call = pci_dn_reconfig_notifier, 217 }; 218 219 struct kmem_cache *dtl_cache; 220 221 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 222 /* 223 * Allocate space for the dispatch trace log for all possible cpus 224 * and register the buffers with the hypervisor. This is used for 225 * computing time stolen by the hypervisor. 226 */ 227 static int alloc_dispatch_logs(void) 228 { 229 int cpu, ret; 230 struct paca_struct *pp; 231 struct dtl_entry *dtl; 232 233 if (!firmware_has_feature(FW_FEATURE_SPLPAR)) 234 return 0; 235 236 if (!dtl_cache) 237 return 0; 238 239 for_each_possible_cpu(cpu) { 240 pp = &paca[cpu]; 241 dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL); 242 if (!dtl) { 243 pr_warn("Failed to allocate dispatch trace log for cpu %d\n", 244 cpu); 245 pr_warn("Stolen time statistics will be unreliable\n"); 246 break; 247 } 248 249 pp->dtl_ridx = 0; 250 pp->dispatch_log = dtl; 251 pp->dispatch_log_end = dtl + N_DISPATCH_LOG; 252 pp->dtl_curr = dtl; 253 } 254 255 /* Register the DTL for the current (boot) cpu */ 256 dtl = get_paca()->dispatch_log; 257 get_paca()->dtl_ridx = 0; 258 get_paca()->dtl_curr = dtl; 259 get_paca()->lppaca_ptr->dtl_idx = 0; 260 261 /* hypervisor reads buffer length from this field */ 262 dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES); 263 ret = register_dtl(hard_smp_processor_id(), __pa(dtl)); 264 if (ret) 265 pr_err("WARNING: DTL registration of cpu %d (hw %d) failed " 266 "with %d\n", smp_processor_id(), 267 hard_smp_processor_id(), ret); 268 get_paca()->lppaca_ptr->dtl_enable_mask = 2; 269 270 return 0; 271 } 272 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 273 static inline int alloc_dispatch_logs(void) 274 { 275 return 0; 276 } 277 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 278 279 static int alloc_dispatch_log_kmem_cache(void) 280 { 281 dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES, 282 DISPATCH_LOG_BYTES, 0, NULL); 283 if (!dtl_cache) { 284 pr_warn("Failed to create dispatch trace log buffer cache\n"); 285 pr_warn("Stolen time statistics will be unreliable\n"); 286 return 0; 287 } 288 289 return alloc_dispatch_logs(); 290 } 291 machine_early_initcall(pseries, alloc_dispatch_log_kmem_cache); 292 293 static void pseries_lpar_idle(void) 294 { 295 /* 296 * Default handler to go into low thread priority and possibly 297 * low power mode by ceding processor to hypervisor 298 */ 299 300 /* Indicate to hypervisor that we are idle. */ 301 get_lppaca()->idle = 1; 302 303 /* 304 * Yield the processor to the hypervisor. We return if 305 * an external interrupt occurs (which are driven prior 306 * to returning here) or if a prod occurs from another 307 * processor. When returning here, external interrupts 308 * are enabled. 309 */ 310 cede_processor(); 311 312 get_lppaca()->idle = 0; 313 } 314 315 /* 316 * Enable relocation on during exceptions. This has partition wide scope and 317 * may take a while to complete, if it takes longer than one second we will 318 * just give up rather than wasting any more time on this - if that turns out 319 * to ever be a problem in practice we can move this into a kernel thread to 320 * finish off the process later in boot. 321 */ 322 void pseries_enable_reloc_on_exc(void) 323 { 324 long rc; 325 unsigned int delay, total_delay = 0; 326 327 while (1) { 328 rc = enable_reloc_on_exceptions(); 329 if (!H_IS_LONG_BUSY(rc)) { 330 if (rc == H_P2) { 331 pr_info("Relocation on exceptions not" 332 " supported\n"); 333 } else if (rc != H_SUCCESS) { 334 pr_warn("Unable to enable relocation" 335 " on exceptions: %ld\n", rc); 336 } 337 break; 338 } 339 340 delay = get_longbusy_msecs(rc); 341 total_delay += delay; 342 if (total_delay > 1000) { 343 pr_warn("Warning: Giving up waiting to enable " 344 "relocation on exceptions (%u msec)!\n", 345 total_delay); 346 return; 347 } 348 349 mdelay(delay); 350 } 351 } 352 EXPORT_SYMBOL(pseries_enable_reloc_on_exc); 353 354 void pseries_disable_reloc_on_exc(void) 355 { 356 long rc; 357 358 while (1) { 359 rc = disable_reloc_on_exceptions(); 360 if (!H_IS_LONG_BUSY(rc)) 361 break; 362 mdelay(get_longbusy_msecs(rc)); 363 } 364 if (rc != H_SUCCESS) 365 pr_warning("Warning: Failed to disable relocation on " 366 "exceptions: %ld\n", rc); 367 } 368 EXPORT_SYMBOL(pseries_disable_reloc_on_exc); 369 370 #ifdef CONFIG_KEXEC 371 static void pSeries_machine_kexec(struct kimage *image) 372 { 373 if (firmware_has_feature(FW_FEATURE_SET_MODE)) 374 pseries_disable_reloc_on_exc(); 375 376 default_machine_kexec(image); 377 } 378 #endif 379 380 #ifdef __LITTLE_ENDIAN__ 381 void pseries_big_endian_exceptions(void) 382 { 383 long rc; 384 385 while (1) { 386 rc = enable_big_endian_exceptions(); 387 if (!H_IS_LONG_BUSY(rc)) 388 break; 389 mdelay(get_longbusy_msecs(rc)); 390 } 391 392 /* 393 * At this point it is unlikely panic() will get anything 394 * out to the user, since this is called very late in kexec 395 * but at least this will stop us from continuing on further 396 * and creating an even more difficult to debug situation. 397 * 398 * There is a known problem when kdump'ing, if cpus are offline 399 * the above call will fail. Rather than panicking again, keep 400 * going and hope the kdump kernel is also little endian, which 401 * it usually is. 402 */ 403 if (rc && !kdump_in_progress()) 404 panic("Could not enable big endian exceptions"); 405 } 406 407 void pseries_little_endian_exceptions(void) 408 { 409 long rc; 410 411 while (1) { 412 rc = enable_little_endian_exceptions(); 413 if (!H_IS_LONG_BUSY(rc)) 414 break; 415 mdelay(get_longbusy_msecs(rc)); 416 } 417 if (rc) { 418 ppc_md.progress("H_SET_MODE LE exception fail", 0); 419 panic("Could not enable little endian exceptions"); 420 } 421 } 422 #endif 423 424 static void __init find_and_init_phbs(void) 425 { 426 struct device_node *node; 427 struct pci_controller *phb; 428 struct device_node *root = of_find_node_by_path("/"); 429 430 for_each_child_of_node(root, node) { 431 if (node->type == NULL || (strcmp(node->type, "pci") != 0 && 432 strcmp(node->type, "pciex") != 0)) 433 continue; 434 435 phb = pcibios_alloc_controller(node); 436 if (!phb) 437 continue; 438 rtas_setup_phb(phb); 439 pci_process_bridge_OF_ranges(phb, node, 0); 440 isa_bridge_find_early(phb); 441 phb->controller_ops = pseries_pci_controller_ops; 442 } 443 444 of_node_put(root); 445 446 /* 447 * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties 448 * in chosen. 449 */ 450 of_pci_check_probe_only(); 451 } 452 453 static void __init pSeries_setup_arch(void) 454 { 455 set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT); 456 457 /* Discover PIC type and setup ppc_md accordingly */ 458 smp_init_pseries(); 459 460 461 /* openpic global configuration register (64-bit format). */ 462 /* openpic Interrupt Source Unit pointer (64-bit format). */ 463 /* python0 facility area (mmio) (64-bit format) REAL address. */ 464 465 /* init to some ~sane value until calibrate_delay() runs */ 466 loops_per_jiffy = 50000000; 467 468 fwnmi_init(); 469 470 /* By default, only probe PCI (can be overridden by rtas_pci) */ 471 pci_add_flags(PCI_PROBE_ONLY); 472 473 /* Find and initialize PCI host bridges */ 474 init_pci_config_tokens(); 475 find_and_init_phbs(); 476 of_reconfig_notifier_register(&pci_dn_reconfig_nb); 477 478 pSeries_nvram_init(); 479 480 if (firmware_has_feature(FW_FEATURE_LPAR)) { 481 vpa_init(boot_cpuid); 482 ppc_md.power_save = pseries_lpar_idle; 483 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; 484 } else { 485 /* No special idle routine */ 486 ppc_md.enable_pmcs = power4_enable_pmcs; 487 } 488 489 ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare; 490 } 491 492 static int __init pSeries_init_panel(void) 493 { 494 /* Manually leave the kernel version on the panel. */ 495 #ifdef __BIG_ENDIAN__ 496 ppc_md.progress("Linux ppc64\n", 0); 497 #else 498 ppc_md.progress("Linux ppc64le\n", 0); 499 #endif 500 ppc_md.progress(init_utsname()->version, 0); 501 502 return 0; 503 } 504 machine_arch_initcall(pseries, pSeries_init_panel); 505 506 static int pseries_set_dabr(unsigned long dabr, unsigned long dabrx) 507 { 508 return plpar_hcall_norets(H_SET_DABR, dabr); 509 } 510 511 static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx) 512 { 513 /* Have to set at least one bit in the DABRX according to PAPR */ 514 if (dabrx == 0 && dabr == 0) 515 dabrx = DABRX_USER; 516 /* PAPR says we can only set kernel and user bits */ 517 dabrx &= DABRX_KERNEL | DABRX_USER; 518 519 return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx); 520 } 521 522 static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx) 523 { 524 /* PAPR says we can't set HYP */ 525 dawrx &= ~DAWRX_HYP; 526 527 return plapr_set_watchpoint0(dawr, dawrx); 528 } 529 530 #define CMO_CHARACTERISTICS_TOKEN 44 531 #define CMO_MAXLENGTH 1026 532 533 void pSeries_coalesce_init(void) 534 { 535 struct hvcall_mpp_x_data mpp_x_data; 536 537 if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data)) 538 powerpc_firmware_features |= FW_FEATURE_XCMO; 539 else 540 powerpc_firmware_features &= ~FW_FEATURE_XCMO; 541 } 542 543 /** 544 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions, 545 * handle that here. (Stolen from parse_system_parameter_string) 546 */ 547 static void pSeries_cmo_feature_init(void) 548 { 549 char *ptr, *key, *value, *end; 550 int call_status; 551 int page_order = IOMMU_PAGE_SHIFT_4K; 552 553 pr_debug(" -> fw_cmo_feature_init()\n"); 554 spin_lock(&rtas_data_buf_lock); 555 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE); 556 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, 557 NULL, 558 CMO_CHARACTERISTICS_TOKEN, 559 __pa(rtas_data_buf), 560 RTAS_DATA_BUF_SIZE); 561 562 if (call_status != 0) { 563 spin_unlock(&rtas_data_buf_lock); 564 pr_debug("CMO not available\n"); 565 pr_debug(" <- fw_cmo_feature_init()\n"); 566 return; 567 } 568 569 end = rtas_data_buf + CMO_MAXLENGTH - 2; 570 ptr = rtas_data_buf + 2; /* step over strlen value */ 571 key = value = ptr; 572 573 while (*ptr && (ptr <= end)) { 574 /* Separate the key and value by replacing '=' with '\0' and 575 * point the value at the string after the '=' 576 */ 577 if (ptr[0] == '=') { 578 ptr[0] = '\0'; 579 value = ptr + 1; 580 } else if (ptr[0] == '\0' || ptr[0] == ',') { 581 /* Terminate the string containing the key/value pair */ 582 ptr[0] = '\0'; 583 584 if (key == value) { 585 pr_debug("Malformed key/value pair\n"); 586 /* Never found a '=', end processing */ 587 break; 588 } 589 590 if (0 == strcmp(key, "CMOPageSize")) 591 page_order = simple_strtol(value, NULL, 10); 592 else if (0 == strcmp(key, "PrPSP")) 593 CMO_PrPSP = simple_strtol(value, NULL, 10); 594 else if (0 == strcmp(key, "SecPSP")) 595 CMO_SecPSP = simple_strtol(value, NULL, 10); 596 value = key = ptr + 1; 597 } 598 ptr++; 599 } 600 601 /* Page size is returned as the power of 2 of the page size, 602 * convert to the page size in bytes before returning 603 */ 604 CMO_PageSize = 1 << page_order; 605 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize); 606 607 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) { 608 pr_info("CMO enabled\n"); 609 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, 610 CMO_SecPSP); 611 powerpc_firmware_features |= FW_FEATURE_CMO; 612 pSeries_coalesce_init(); 613 } else 614 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, 615 CMO_SecPSP); 616 spin_unlock(&rtas_data_buf_lock); 617 pr_debug(" <- fw_cmo_feature_init()\n"); 618 } 619 620 /* 621 * Early initialization. Relocation is on but do not reference unbolted pages 622 */ 623 static void __init pseries_init(void) 624 { 625 pr_debug(" -> pseries_init()\n"); 626 627 #ifdef CONFIG_HVC_CONSOLE 628 if (firmware_has_feature(FW_FEATURE_LPAR)) 629 hvc_vio_init_early(); 630 #endif 631 if (firmware_has_feature(FW_FEATURE_XDABR)) 632 ppc_md.set_dabr = pseries_set_xdabr; 633 else if (firmware_has_feature(FW_FEATURE_DABR)) 634 ppc_md.set_dabr = pseries_set_dabr; 635 636 if (firmware_has_feature(FW_FEATURE_SET_MODE)) 637 ppc_md.set_dawr = pseries_set_dawr; 638 639 pSeries_cmo_feature_init(); 640 iommu_init_early_pSeries(); 641 642 pr_debug(" <- pseries_init()\n"); 643 } 644 645 /** 646 * pseries_power_off - tell firmware about how to power off the system. 647 * 648 * This function calls either the power-off rtas token in normal cases 649 * or the ibm,power-off-ups token (if present & requested) in case of 650 * a power failure. If power-off token is used, power on will only be 651 * possible with power button press. If ibm,power-off-ups token is used 652 * it will allow auto poweron after power is restored. 653 */ 654 static void pseries_power_off(void) 655 { 656 int rc; 657 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups"); 658 659 if (rtas_flash_term_hook) 660 rtas_flash_term_hook(SYS_POWER_OFF); 661 662 if (rtas_poweron_auto == 0 || 663 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) { 664 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1); 665 printk(KERN_INFO "RTAS power-off returned %d\n", rc); 666 } else { 667 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL); 668 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc); 669 } 670 for (;;); 671 } 672 673 static int __init pSeries_probe(void) 674 { 675 const char *dtype = of_get_property(of_root, "device_type", NULL); 676 677 if (dtype == NULL) 678 return 0; 679 if (strcmp(dtype, "chrp")) 680 return 0; 681 682 /* Cell blades firmware claims to be chrp while it's not. Until this 683 * is fixed, we need to avoid those here. 684 */ 685 if (of_machine_is_compatible("IBM,CPBW-1.0") || 686 of_machine_is_compatible("IBM,CBEA")) 687 return 0; 688 689 pm_power_off = pseries_power_off; 690 691 pr_debug("Machine is%s LPAR !\n", 692 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not"); 693 694 pseries_init(); 695 696 return 1; 697 } 698 699 static int pSeries_pci_probe_mode(struct pci_bus *bus) 700 { 701 if (firmware_has_feature(FW_FEATURE_LPAR)) 702 return PCI_PROBE_DEVTREE; 703 return PCI_PROBE_NORMAL; 704 } 705 706 struct pci_controller_ops pseries_pci_controller_ops = { 707 .probe_mode = pSeries_pci_probe_mode, 708 }; 709 710 define_machine(pseries) { 711 .name = "pSeries", 712 .probe = pSeries_probe, 713 .setup_arch = pSeries_setup_arch, 714 .init_IRQ = pseries_init_irq, 715 .show_cpuinfo = pSeries_show_cpuinfo, 716 .log_error = pSeries_log_error, 717 .pcibios_fixup = pSeries_final_fixup, 718 .restart = rtas_restart, 719 .halt = rtas_halt, 720 .panic = rtas_os_term, 721 .get_boot_time = rtas_get_boot_time, 722 .get_rtc_time = rtas_get_rtc_time, 723 .set_rtc_time = rtas_set_rtc_time, 724 .calibrate_decr = generic_calibrate_decr, 725 .progress = rtas_progress, 726 .system_reset_exception = pSeries_system_reset_exception, 727 .machine_check_exception = pSeries_machine_check_exception, 728 #ifdef CONFIG_KEXEC 729 .machine_kexec = pSeries_machine_kexec, 730 .kexec_cpu_down = pseries_kexec_cpu_down, 731 #endif 732 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 733 .memory_block_size = pseries_memory_block_size, 734 #endif 735 }; 736