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 45 #include <asm/mmu.h> 46 #include <asm/processor.h> 47 #include <asm/io.h> 48 #include <asm/pgtable.h> 49 #include <asm/prom.h> 50 #include <asm/rtas.h> 51 #include <asm/pci-bridge.h> 52 #include <asm/iommu.h> 53 #include <asm/dma.h> 54 #include <asm/machdep.h> 55 #include <asm/irq.h> 56 #include <asm/time.h> 57 #include <asm/nvram.h> 58 #include <asm/pmc.h> 59 #include <asm/xics.h> 60 #include <asm/xive.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 #include <asm/kexec.h> 70 #include <asm/isa-bridge.h> 71 72 #include "pseries.h" 73 74 int CMO_PrPSP = -1; 75 int CMO_SecPSP = -1; 76 unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K); 77 EXPORT_SYMBOL(CMO_PageSize); 78 79 int fwnmi_active; /* TRUE if an FWNMI handler is present */ 80 81 static void pSeries_show_cpuinfo(struct seq_file *m) 82 { 83 struct device_node *root; 84 const char *model = ""; 85 86 root = of_find_node_by_path("/"); 87 if (root) 88 model = of_get_property(root, "model", NULL); 89 seq_printf(m, "machine\t\t: CHRP %s\n", model); 90 of_node_put(root); 91 if (radix_enabled()) 92 seq_printf(m, "MMU\t\t: Radix\n"); 93 else 94 seq_printf(m, "MMU\t\t: Hash\n"); 95 } 96 97 /* Initialize firmware assisted non-maskable interrupts if 98 * the firmware supports this feature. 99 */ 100 static void __init fwnmi_init(void) 101 { 102 unsigned long system_reset_addr, machine_check_addr; 103 104 int ibm_nmi_register = rtas_token("ibm,nmi-register"); 105 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE) 106 return; 107 108 /* If the kernel's not linked at zero we point the firmware at low 109 * addresses anyway, and use a trampoline to get to the real code. */ 110 system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START; 111 machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START; 112 113 if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr, 114 machine_check_addr)) 115 fwnmi_active = 1; 116 } 117 118 static void pseries_8259_cascade(struct irq_desc *desc) 119 { 120 struct irq_chip *chip = irq_desc_get_chip(desc); 121 unsigned int cascade_irq = i8259_irq(); 122 123 if (cascade_irq) 124 generic_handle_irq(cascade_irq); 125 126 chip->irq_eoi(&desc->irq_data); 127 } 128 129 static void __init pseries_setup_i8259_cascade(void) 130 { 131 struct device_node *np, *old, *found = NULL; 132 unsigned int cascade; 133 const u32 *addrp; 134 unsigned long intack = 0; 135 int naddr; 136 137 for_each_node_by_type(np, "interrupt-controller") { 138 if (of_device_is_compatible(np, "chrp,iic")) { 139 found = np; 140 break; 141 } 142 } 143 144 if (found == NULL) { 145 printk(KERN_DEBUG "pic: no ISA interrupt controller\n"); 146 return; 147 } 148 149 cascade = irq_of_parse_and_map(found, 0); 150 if (!cascade) { 151 printk(KERN_ERR "pic: failed to map cascade interrupt"); 152 return; 153 } 154 pr_debug("pic: cascade mapped to irq %d\n", cascade); 155 156 for (old = of_node_get(found); old != NULL ; old = np) { 157 np = of_get_parent(old); 158 of_node_put(old); 159 if (np == NULL) 160 break; 161 if (strcmp(np->name, "pci") != 0) 162 continue; 163 addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL); 164 if (addrp == NULL) 165 continue; 166 naddr = of_n_addr_cells(np); 167 intack = addrp[naddr-1]; 168 if (naddr > 1) 169 intack |= ((unsigned long)addrp[naddr-2]) << 32; 170 } 171 if (intack) 172 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack); 173 i8259_init(found, intack); 174 of_node_put(found); 175 irq_set_chained_handler(cascade, pseries_8259_cascade); 176 } 177 178 static void __init pseries_init_irq(void) 179 { 180 /* Try using a XIVE if available, otherwise use a XICS */ 181 if (!xive_spapr_init()) { 182 xics_init(); 183 pseries_setup_i8259_cascade(); 184 } 185 } 186 187 static void pseries_lpar_enable_pmcs(void) 188 { 189 unsigned long set, reset; 190 191 set = 1UL << 63; 192 reset = 0; 193 plpar_hcall_norets(H_PERFMON, set, reset); 194 } 195 196 static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data) 197 { 198 struct of_reconfig_data *rd = data; 199 struct device_node *parent, *np = rd->dn; 200 struct pci_dn *pdn; 201 int err = NOTIFY_OK; 202 203 switch (action) { 204 case OF_RECONFIG_ATTACH_NODE: 205 parent = of_get_parent(np); 206 pdn = parent ? PCI_DN(parent) : NULL; 207 if (pdn) 208 pci_add_device_node_info(pdn->phb, np); 209 210 of_node_put(parent); 211 break; 212 case OF_RECONFIG_DETACH_NODE: 213 pdn = PCI_DN(np); 214 if (pdn) 215 list_del(&pdn->list); 216 break; 217 default: 218 err = NOTIFY_DONE; 219 break; 220 } 221 return err; 222 } 223 224 static struct notifier_block pci_dn_reconfig_nb = { 225 .notifier_call = pci_dn_reconfig_notifier, 226 }; 227 228 struct kmem_cache *dtl_cache; 229 230 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 231 /* 232 * Allocate space for the dispatch trace log for all possible cpus 233 * and register the buffers with the hypervisor. This is used for 234 * computing time stolen by the hypervisor. 235 */ 236 static int alloc_dispatch_logs(void) 237 { 238 int cpu, ret; 239 struct paca_struct *pp; 240 struct dtl_entry *dtl; 241 242 if (!firmware_has_feature(FW_FEATURE_SPLPAR)) 243 return 0; 244 245 if (!dtl_cache) 246 return 0; 247 248 for_each_possible_cpu(cpu) { 249 pp = &paca[cpu]; 250 dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL); 251 if (!dtl) { 252 pr_warn("Failed to allocate dispatch trace log for cpu %d\n", 253 cpu); 254 pr_warn("Stolen time statistics will be unreliable\n"); 255 break; 256 } 257 258 pp->dtl_ridx = 0; 259 pp->dispatch_log = dtl; 260 pp->dispatch_log_end = dtl + N_DISPATCH_LOG; 261 pp->dtl_curr = dtl; 262 } 263 264 /* Register the DTL for the current (boot) cpu */ 265 dtl = get_paca()->dispatch_log; 266 get_paca()->dtl_ridx = 0; 267 get_paca()->dtl_curr = dtl; 268 get_paca()->lppaca_ptr->dtl_idx = 0; 269 270 /* hypervisor reads buffer length from this field */ 271 dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES); 272 ret = register_dtl(hard_smp_processor_id(), __pa(dtl)); 273 if (ret) 274 pr_err("WARNING: DTL registration of cpu %d (hw %d) failed " 275 "with %d\n", smp_processor_id(), 276 hard_smp_processor_id(), ret); 277 get_paca()->lppaca_ptr->dtl_enable_mask = 2; 278 279 return 0; 280 } 281 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 282 static inline int alloc_dispatch_logs(void) 283 { 284 return 0; 285 } 286 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 287 288 static int alloc_dispatch_log_kmem_cache(void) 289 { 290 dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES, 291 DISPATCH_LOG_BYTES, 0, NULL); 292 if (!dtl_cache) { 293 pr_warn("Failed to create dispatch trace log buffer cache\n"); 294 pr_warn("Stolen time statistics will be unreliable\n"); 295 return 0; 296 } 297 298 return alloc_dispatch_logs(); 299 } 300 machine_early_initcall(pseries, alloc_dispatch_log_kmem_cache); 301 302 static void pseries_lpar_idle(void) 303 { 304 /* 305 * Default handler to go into low thread priority and possibly 306 * low power mode by ceding processor to hypervisor 307 */ 308 309 /* Indicate to hypervisor that we are idle. */ 310 get_lppaca()->idle = 1; 311 312 /* 313 * Yield the processor to the hypervisor. We return if 314 * an external interrupt occurs (which are driven prior 315 * to returning here) or if a prod occurs from another 316 * processor. When returning here, external interrupts 317 * are enabled. 318 */ 319 cede_processor(); 320 321 get_lppaca()->idle = 0; 322 } 323 324 /* 325 * Enable relocation on during exceptions. This has partition wide scope and 326 * may take a while to complete, if it takes longer than one second we will 327 * just give up rather than wasting any more time on this - if that turns out 328 * to ever be a problem in practice we can move this into a kernel thread to 329 * finish off the process later in boot. 330 */ 331 void pseries_enable_reloc_on_exc(void) 332 { 333 long rc; 334 unsigned int delay, total_delay = 0; 335 336 while (1) { 337 rc = enable_reloc_on_exceptions(); 338 if (!H_IS_LONG_BUSY(rc)) { 339 if (rc == H_P2) { 340 pr_info("Relocation on exceptions not" 341 " supported\n"); 342 } else if (rc != H_SUCCESS) { 343 pr_warn("Unable to enable relocation" 344 " on exceptions: %ld\n", rc); 345 } 346 break; 347 } 348 349 delay = get_longbusy_msecs(rc); 350 total_delay += delay; 351 if (total_delay > 1000) { 352 pr_warn("Warning: Giving up waiting to enable " 353 "relocation on exceptions (%u msec)!\n", 354 total_delay); 355 return; 356 } 357 358 mdelay(delay); 359 } 360 } 361 EXPORT_SYMBOL(pseries_enable_reloc_on_exc); 362 363 void pseries_disable_reloc_on_exc(void) 364 { 365 long rc; 366 367 while (1) { 368 rc = disable_reloc_on_exceptions(); 369 if (!H_IS_LONG_BUSY(rc)) 370 break; 371 mdelay(get_longbusy_msecs(rc)); 372 } 373 if (rc != H_SUCCESS) 374 pr_warning("Warning: Failed to disable relocation on " 375 "exceptions: %ld\n", rc); 376 } 377 EXPORT_SYMBOL(pseries_disable_reloc_on_exc); 378 379 #ifdef CONFIG_KEXEC_CORE 380 static void pSeries_machine_kexec(struct kimage *image) 381 { 382 if (firmware_has_feature(FW_FEATURE_SET_MODE)) 383 pseries_disable_reloc_on_exc(); 384 385 default_machine_kexec(image); 386 } 387 #endif 388 389 #ifdef __LITTLE_ENDIAN__ 390 void pseries_big_endian_exceptions(void) 391 { 392 long rc; 393 394 while (1) { 395 rc = enable_big_endian_exceptions(); 396 if (!H_IS_LONG_BUSY(rc)) 397 break; 398 mdelay(get_longbusy_msecs(rc)); 399 } 400 401 /* 402 * At this point it is unlikely panic() will get anything 403 * out to the user, since this is called very late in kexec 404 * but at least this will stop us from continuing on further 405 * and creating an even more difficult to debug situation. 406 * 407 * There is a known problem when kdump'ing, if cpus are offline 408 * the above call will fail. Rather than panicking again, keep 409 * going and hope the kdump kernel is also little endian, which 410 * it usually is. 411 */ 412 if (rc && !kdump_in_progress()) 413 panic("Could not enable big endian exceptions"); 414 } 415 416 void pseries_little_endian_exceptions(void) 417 { 418 long rc; 419 420 while (1) { 421 rc = enable_little_endian_exceptions(); 422 if (!H_IS_LONG_BUSY(rc)) 423 break; 424 mdelay(get_longbusy_msecs(rc)); 425 } 426 if (rc) { 427 ppc_md.progress("H_SET_MODE LE exception fail", 0); 428 panic("Could not enable little endian exceptions"); 429 } 430 } 431 #endif 432 433 static void __init find_and_init_phbs(void) 434 { 435 struct device_node *node; 436 struct pci_controller *phb; 437 struct device_node *root = of_find_node_by_path("/"); 438 439 for_each_child_of_node(root, node) { 440 if (node->type == NULL || (strcmp(node->type, "pci") != 0 && 441 strcmp(node->type, "pciex") != 0)) 442 continue; 443 444 phb = pcibios_alloc_controller(node); 445 if (!phb) 446 continue; 447 rtas_setup_phb(phb); 448 pci_process_bridge_OF_ranges(phb, node, 0); 449 isa_bridge_find_early(phb); 450 phb->controller_ops = pseries_pci_controller_ops; 451 } 452 453 of_node_put(root); 454 455 /* 456 * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties 457 * in chosen. 458 */ 459 of_pci_check_probe_only(); 460 } 461 462 static void __init pSeries_setup_arch(void) 463 { 464 set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT); 465 466 /* Discover PIC type and setup ppc_md accordingly */ 467 smp_init_pseries(); 468 469 470 /* openpic global configuration register (64-bit format). */ 471 /* openpic Interrupt Source Unit pointer (64-bit format). */ 472 /* python0 facility area (mmio) (64-bit format) REAL address. */ 473 474 /* init to some ~sane value until calibrate_delay() runs */ 475 loops_per_jiffy = 50000000; 476 477 fwnmi_init(); 478 479 /* By default, only probe PCI (can be overridden by rtas_pci) */ 480 pci_add_flags(PCI_PROBE_ONLY); 481 482 /* Find and initialize PCI host bridges */ 483 init_pci_config_tokens(); 484 find_and_init_phbs(); 485 of_reconfig_notifier_register(&pci_dn_reconfig_nb); 486 487 pSeries_nvram_init(); 488 489 if (firmware_has_feature(FW_FEATURE_LPAR)) { 490 vpa_init(boot_cpuid); 491 ppc_md.power_save = pseries_lpar_idle; 492 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; 493 } else { 494 /* No special idle routine */ 495 ppc_md.enable_pmcs = power4_enable_pmcs; 496 } 497 498 ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare; 499 } 500 501 static int __init pSeries_init_panel(void) 502 { 503 /* Manually leave the kernel version on the panel. */ 504 #ifdef __BIG_ENDIAN__ 505 ppc_md.progress("Linux ppc64\n", 0); 506 #else 507 ppc_md.progress("Linux ppc64le\n", 0); 508 #endif 509 ppc_md.progress(init_utsname()->version, 0); 510 511 return 0; 512 } 513 machine_arch_initcall(pseries, pSeries_init_panel); 514 515 static int pseries_set_dabr(unsigned long dabr, unsigned long dabrx) 516 { 517 return plpar_hcall_norets(H_SET_DABR, dabr); 518 } 519 520 static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx) 521 { 522 /* Have to set at least one bit in the DABRX according to PAPR */ 523 if (dabrx == 0 && dabr == 0) 524 dabrx = DABRX_USER; 525 /* PAPR says we can only set kernel and user bits */ 526 dabrx &= DABRX_KERNEL | DABRX_USER; 527 528 return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx); 529 } 530 531 static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx) 532 { 533 /* PAPR says we can't set HYP */ 534 dawrx &= ~DAWRX_HYP; 535 536 return plapr_set_watchpoint0(dawr, dawrx); 537 } 538 539 #define CMO_CHARACTERISTICS_TOKEN 44 540 #define CMO_MAXLENGTH 1026 541 542 void pSeries_coalesce_init(void) 543 { 544 struct hvcall_mpp_x_data mpp_x_data; 545 546 if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data)) 547 powerpc_firmware_features |= FW_FEATURE_XCMO; 548 else 549 powerpc_firmware_features &= ~FW_FEATURE_XCMO; 550 } 551 552 /** 553 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions, 554 * handle that here. (Stolen from parse_system_parameter_string) 555 */ 556 static void pSeries_cmo_feature_init(void) 557 { 558 char *ptr, *key, *value, *end; 559 int call_status; 560 int page_order = IOMMU_PAGE_SHIFT_4K; 561 562 pr_debug(" -> fw_cmo_feature_init()\n"); 563 spin_lock(&rtas_data_buf_lock); 564 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE); 565 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, 566 NULL, 567 CMO_CHARACTERISTICS_TOKEN, 568 __pa(rtas_data_buf), 569 RTAS_DATA_BUF_SIZE); 570 571 if (call_status != 0) { 572 spin_unlock(&rtas_data_buf_lock); 573 pr_debug("CMO not available\n"); 574 pr_debug(" <- fw_cmo_feature_init()\n"); 575 return; 576 } 577 578 end = rtas_data_buf + CMO_MAXLENGTH - 2; 579 ptr = rtas_data_buf + 2; /* step over strlen value */ 580 key = value = ptr; 581 582 while (*ptr && (ptr <= end)) { 583 /* Separate the key and value by replacing '=' with '\0' and 584 * point the value at the string after the '=' 585 */ 586 if (ptr[0] == '=') { 587 ptr[0] = '\0'; 588 value = ptr + 1; 589 } else if (ptr[0] == '\0' || ptr[0] == ',') { 590 /* Terminate the string containing the key/value pair */ 591 ptr[0] = '\0'; 592 593 if (key == value) { 594 pr_debug("Malformed key/value pair\n"); 595 /* Never found a '=', end processing */ 596 break; 597 } 598 599 if (0 == strcmp(key, "CMOPageSize")) 600 page_order = simple_strtol(value, NULL, 10); 601 else if (0 == strcmp(key, "PrPSP")) 602 CMO_PrPSP = simple_strtol(value, NULL, 10); 603 else if (0 == strcmp(key, "SecPSP")) 604 CMO_SecPSP = simple_strtol(value, NULL, 10); 605 value = key = ptr + 1; 606 } 607 ptr++; 608 } 609 610 /* Page size is returned as the power of 2 of the page size, 611 * convert to the page size in bytes before returning 612 */ 613 CMO_PageSize = 1 << page_order; 614 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize); 615 616 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) { 617 pr_info("CMO enabled\n"); 618 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, 619 CMO_SecPSP); 620 powerpc_firmware_features |= FW_FEATURE_CMO; 621 pSeries_coalesce_init(); 622 } else 623 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, 624 CMO_SecPSP); 625 spin_unlock(&rtas_data_buf_lock); 626 pr_debug(" <- fw_cmo_feature_init()\n"); 627 } 628 629 /* 630 * Early initialization. Relocation is on but do not reference unbolted pages 631 */ 632 static void __init pseries_init(void) 633 { 634 pr_debug(" -> pseries_init()\n"); 635 636 #ifdef CONFIG_HVC_CONSOLE 637 if (firmware_has_feature(FW_FEATURE_LPAR)) 638 hvc_vio_init_early(); 639 #endif 640 if (firmware_has_feature(FW_FEATURE_XDABR)) 641 ppc_md.set_dabr = pseries_set_xdabr; 642 else if (firmware_has_feature(FW_FEATURE_DABR)) 643 ppc_md.set_dabr = pseries_set_dabr; 644 645 if (firmware_has_feature(FW_FEATURE_SET_MODE)) 646 ppc_md.set_dawr = pseries_set_dawr; 647 648 pSeries_cmo_feature_init(); 649 iommu_init_early_pSeries(); 650 651 pr_debug(" <- pseries_init()\n"); 652 } 653 654 /** 655 * pseries_power_off - tell firmware about how to power off the system. 656 * 657 * This function calls either the power-off rtas token in normal cases 658 * or the ibm,power-off-ups token (if present & requested) in case of 659 * a power failure. If power-off token is used, power on will only be 660 * possible with power button press. If ibm,power-off-ups token is used 661 * it will allow auto poweron after power is restored. 662 */ 663 static void pseries_power_off(void) 664 { 665 int rc; 666 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups"); 667 668 if (rtas_flash_term_hook) 669 rtas_flash_term_hook(SYS_POWER_OFF); 670 671 if (rtas_poweron_auto == 0 || 672 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) { 673 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1); 674 printk(KERN_INFO "RTAS power-off returned %d\n", rc); 675 } else { 676 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL); 677 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc); 678 } 679 for (;;); 680 } 681 682 static int __init pSeries_probe(void) 683 { 684 const char *dtype = of_get_property(of_root, "device_type", NULL); 685 686 if (dtype == NULL) 687 return 0; 688 if (strcmp(dtype, "chrp")) 689 return 0; 690 691 /* Cell blades firmware claims to be chrp while it's not. Until this 692 * is fixed, we need to avoid those here. 693 */ 694 if (of_machine_is_compatible("IBM,CPBW-1.0") || 695 of_machine_is_compatible("IBM,CBEA")) 696 return 0; 697 698 pm_power_off = pseries_power_off; 699 700 pr_debug("Machine is%s LPAR !\n", 701 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not"); 702 703 pseries_init(); 704 705 return 1; 706 } 707 708 static int pSeries_pci_probe_mode(struct pci_bus *bus) 709 { 710 if (firmware_has_feature(FW_FEATURE_LPAR)) 711 return PCI_PROBE_DEVTREE; 712 return PCI_PROBE_NORMAL; 713 } 714 715 struct pci_controller_ops pseries_pci_controller_ops = { 716 .probe_mode = pSeries_pci_probe_mode, 717 }; 718 719 define_machine(pseries) { 720 .name = "pSeries", 721 .probe = pSeries_probe, 722 .setup_arch = pSeries_setup_arch, 723 .init_IRQ = pseries_init_irq, 724 .show_cpuinfo = pSeries_show_cpuinfo, 725 .log_error = pSeries_log_error, 726 .pcibios_fixup = pSeries_final_fixup, 727 .restart = rtas_restart, 728 .halt = rtas_halt, 729 .get_boot_time = rtas_get_boot_time, 730 .get_rtc_time = rtas_get_rtc_time, 731 .set_rtc_time = rtas_set_rtc_time, 732 .calibrate_decr = generic_calibrate_decr, 733 .progress = rtas_progress, 734 .system_reset_exception = pSeries_system_reset_exception, 735 .machine_check_exception = pSeries_machine_check_exception, 736 #ifdef CONFIG_KEXEC_CORE 737 .machine_kexec = pSeries_machine_kexec, 738 .kexec_cpu_down = pseries_kexec_cpu_down, 739 #endif 740 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 741 .memory_block_size = pseries_memory_block_size, 742 #endif 743 }; 744