2 * 64-bit pSeries and RS/6000 setup code.
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
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.
16 * bootup setup stuff..
19 #include <linux/cpu.h>
20 #include <linux/errno.h>
21 #include <linux/sched.h>
22 #include <linux/kernel.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>
43 #include <linux/of_pci.h>
46 #include <asm/processor.h>
48 #include <asm/pgtable.h>
51 #include <asm/pci-bridge.h>
52 #include <asm/iommu.h>
54 #include <asm/machdep.h>
57 #include <asm/nvram.h>
61 #include <asm/ppc-pci.h>
62 #include <asm/i8259.h>
65 #include <asm/firmware.h>
68 #include <asm/plpar_wrappers.h>
69 #include <asm/kexec.h>
70 #include <asm/isa-bridge.h>
76 unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K);
77 EXPORT_SYMBOL(CMO_PageSize);
79 int fwnmi_active; /* TRUE if an FWNMI handler is present */
81 static void pSeries_show_cpuinfo(struct seq_file *m)
83 struct device_node *root;
84 const char *model = "";
86 root = of_find_node_by_path("/");
88 model = of_get_property(root, "model", NULL);
89 seq_printf(m, "machine\t\t: CHRP %s\n", model);
92 seq_printf(m, "MMU\t\t: Radix\n");
94 seq_printf(m, "MMU\t\t: Hash\n");
97 /* Initialize firmware assisted non-maskable interrupts if
98 * the firmware supports this feature.
100 static void __init fwnmi_init(void)
102 unsigned long system_reset_addr, machine_check_addr;
104 int ibm_nmi_register = rtas_token("ibm,nmi-register");
105 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
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;
113 if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr,
118 static void pseries_8259_cascade(struct irq_desc *desc)
120 struct irq_chip *chip = irq_desc_get_chip(desc);
121 unsigned int cascade_irq = i8259_irq();
124 generic_handle_irq(cascade_irq);
126 chip->irq_eoi(&desc->irq_data);
129 static void __init pseries_setup_i8259_cascade(void)
131 struct device_node *np, *old, *found = NULL;
132 unsigned int cascade;
134 unsigned long intack = 0;
137 for_each_node_by_type(np, "interrupt-controller") {
138 if (of_device_is_compatible(np, "chrp,iic")) {
145 printk(KERN_DEBUG "pic: no ISA interrupt controller\n");
149 cascade = irq_of_parse_and_map(found, 0);
151 printk(KERN_ERR "pic: failed to map cascade interrupt");
154 pr_debug("pic: cascade mapped to irq %d\n", cascade);
156 for (old = of_node_get(found); old != NULL ; old = np) {
157 np = of_get_parent(old);
161 if (strcmp(np->name, "pci") != 0)
163 addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
166 naddr = of_n_addr_cells(np);
167 intack = addrp[naddr-1];
169 intack |= ((unsigned long)addrp[naddr-2]) << 32;
172 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack);
173 i8259_init(found, intack);
175 irq_set_chained_handler(cascade, pseries_8259_cascade);
178 static void __init pseries_init_irq(void)
180 /* Try using a XIVE if available, otherwise use a XICS */
181 if (!xive_spapr_init()) {
183 pseries_setup_i8259_cascade();
187 static void pseries_lpar_enable_pmcs(void)
189 unsigned long set, reset;
193 plpar_hcall_norets(H_PERFMON, set, reset);
196 static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data)
198 struct of_reconfig_data *rd = data;
199 struct device_node *parent, *np = rd->dn;
204 case OF_RECONFIG_ATTACH_NODE:
205 parent = of_get_parent(np);
206 pdn = parent ? PCI_DN(parent) : NULL;
208 pci_add_device_node_info(pdn->phb, np);
212 case OF_RECONFIG_DETACH_NODE:
215 list_del(&pdn->list);
224 static struct notifier_block pci_dn_reconfig_nb = {
225 .notifier_call = pci_dn_reconfig_notifier,
228 struct kmem_cache *dtl_cache;
230 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
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.
236 static int alloc_dispatch_logs(void)
239 struct paca_struct *pp;
240 struct dtl_entry *dtl;
242 if (!firmware_has_feature(FW_FEATURE_SPLPAR))
248 for_each_possible_cpu(cpu) {
250 dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL);
252 pr_warn("Failed to allocate dispatch trace log for cpu %d\n",
254 pr_warn("Stolen time statistics will be unreliable\n");
259 pp->dispatch_log = dtl;
260 pp->dispatch_log_end = dtl + N_DISPATCH_LOG;
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;
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));
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;
281 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
282 static inline int alloc_dispatch_logs(void)
286 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
288 static int alloc_dispatch_log_kmem_cache(void)
290 dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES,
291 DISPATCH_LOG_BYTES, 0, NULL);
293 pr_warn("Failed to create dispatch trace log buffer cache\n");
294 pr_warn("Stolen time statistics will be unreliable\n");
298 return alloc_dispatch_logs();
300 machine_early_initcall(pseries, alloc_dispatch_log_kmem_cache);
302 static void pseries_lpar_idle(void)
305 * Default handler to go into low thread priority and possibly
306 * low power mode by ceding processor to hypervisor
309 /* Indicate to hypervisor that we are idle. */
310 get_lppaca()->idle = 1;
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
321 get_lppaca()->idle = 0;
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.
331 void pseries_enable_reloc_on_exc(void)
334 unsigned int delay, total_delay = 0;
337 rc = enable_reloc_on_exceptions();
338 if (!H_IS_LONG_BUSY(rc)) {
340 pr_info("Relocation on exceptions not"
342 } else if (rc != H_SUCCESS) {
343 pr_warn("Unable to enable relocation"
344 " on exceptions: %ld\n", rc);
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",
361 EXPORT_SYMBOL(pseries_enable_reloc_on_exc);
363 void pseries_disable_reloc_on_exc(void)
368 rc = disable_reloc_on_exceptions();
369 if (!H_IS_LONG_BUSY(rc))
371 mdelay(get_longbusy_msecs(rc));
374 pr_warn("Warning: Failed to disable relocation on exceptions: %ld\n",
377 EXPORT_SYMBOL(pseries_disable_reloc_on_exc);
379 #ifdef CONFIG_KEXEC_CORE
380 static void pSeries_machine_kexec(struct kimage *image)
382 if (firmware_has_feature(FW_FEATURE_SET_MODE))
383 pseries_disable_reloc_on_exc();
385 default_machine_kexec(image);
389 #ifdef __LITTLE_ENDIAN__
390 void pseries_big_endian_exceptions(void)
395 rc = enable_big_endian_exceptions();
396 if (!H_IS_LONG_BUSY(rc))
398 mdelay(get_longbusy_msecs(rc));
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.
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
412 if (rc && !kdump_in_progress())
413 panic("Could not enable big endian exceptions");
416 void pseries_little_endian_exceptions(void)
421 rc = enable_little_endian_exceptions();
422 if (!H_IS_LONG_BUSY(rc))
424 mdelay(get_longbusy_msecs(rc));
427 ppc_md.progress("H_SET_MODE LE exception fail", 0);
428 panic("Could not enable little endian exceptions");
433 static void __init find_and_init_phbs(void)
435 struct device_node *node;
436 struct pci_controller *phb;
437 struct device_node *root = of_find_node_by_path("/");
439 for_each_child_of_node(root, node) {
440 if (node->type == NULL || (strcmp(node->type, "pci") != 0 &&
441 strcmp(node->type, "pciex") != 0))
444 phb = pcibios_alloc_controller(node);
448 pci_process_bridge_OF_ranges(phb, node, 0);
449 isa_bridge_find_early(phb);
450 phb->controller_ops = pseries_pci_controller_ops;
456 * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties
459 of_pci_check_probe_only();
462 static void pseries_setup_rfi_flush(void)
464 struct h_cpu_char_result result;
465 enum l1d_flush_type types;
469 /* Enable by default */
472 rc = plpar_get_cpu_characteristics(&result);
473 if (rc == H_SUCCESS) {
474 types = L1D_FLUSH_NONE;
476 if (result.character & H_CPU_CHAR_L1D_FLUSH_TRIG2)
477 types |= L1D_FLUSH_MTTRIG;
478 if (result.character & H_CPU_CHAR_L1D_FLUSH_ORI30)
479 types |= L1D_FLUSH_ORI;
481 /* Use fallback if nothing set in hcall */
482 if (types == L1D_FLUSH_NONE)
483 types = L1D_FLUSH_FALLBACK;
485 if ((!(result.behaviour & H_CPU_BEHAV_L1D_FLUSH_PR)) ||
486 (!(result.behaviour & H_CPU_BEHAV_FAVOUR_SECURITY)))
489 /* Default to fallback if case hcall is not available */
490 types = L1D_FLUSH_FALLBACK;
493 setup_rfi_flush(types, enable);
496 #ifdef CONFIG_PCI_IOV
497 enum rtas_iov_fw_value_map {
498 NUM_RES_PROPERTY = 0, /* Number of Resources */
499 LOW_INT = 1, /* Lowest 32 bits of Address */
500 START_OF_ENTRIES = 2, /* Always start of entry */
501 APERTURE_PROPERTY = 2, /* Start of entry+ to Aperture Size */
502 WDW_SIZE_PROPERTY = 4, /* Start of entry+ to Window Size */
503 NEXT_ENTRY = 7 /* Go to next entry on array */
506 enum get_iov_fw_value_index {
507 BAR_ADDRS = 1, /* Get Bar Address */
508 APERTURE_SIZE = 2, /* Get Aperture Size */
509 WDW_SIZE = 3 /* Get Window Size */
512 resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno,
513 enum get_iov_fw_value_index value)
516 struct device_node *dn = pci_device_to_OF_node(dev);
517 int i, num_res, ret = 0;
519 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
524 * First element in the array is the number of Bars
525 * returned. Search through the list to find the matching
528 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
529 if (resno >= num_res)
530 return 0; /* or an errror */
532 i = START_OF_ENTRIES + NEXT_ENTRY * resno;
535 ret = of_read_number(&indexes[i], 2);
538 ret = of_read_number(&indexes[i + APERTURE_PROPERTY], 2);
541 ret = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2);
548 void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes)
550 struct resource *res;
551 resource_size_t base, size;
554 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
555 num_res = min_t(int, num_res, PCI_SRIOV_NUM_BARS);
556 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS;
557 i += NEXT_ENTRY, r++) {
558 res = &dev->resource[r + PCI_IOV_RESOURCES];
559 base = of_read_number(&indexes[i], 2);
560 size = of_read_number(&indexes[i + APERTURE_PROPERTY], 2);
561 res->flags = pci_parse_of_flags(of_read_number
562 (&indexes[i + LOW_INT], 1), 0);
563 res->flags |= (IORESOURCE_MEM_64 | IORESOURCE_PCI_FIXED);
564 res->name = pci_name(dev);
566 res->end = base + size - 1;
570 void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes)
572 struct resource *res, *root, *conflict;
573 resource_size_t base, size;
577 * First element in the array is the number of Bars
578 * returned. Search through the list to find the matching
579 * bars assign them from firmware into resources structure.
581 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
582 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS;
583 i += NEXT_ENTRY, r++) {
584 res = &dev->resource[r + PCI_IOV_RESOURCES];
585 base = of_read_number(&indexes[i], 2);
586 size = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2);
587 res->name = pci_name(dev);
589 res->end = base + size - 1;
590 root = &iomem_resource;
592 "pSeries IOV BAR %d: trying firmware assignment %pR\n",
593 r + PCI_IOV_RESOURCES, res);
594 conflict = request_resource_conflict(root, res);
597 "BAR %d: %pR conflicts with %s %pR\n",
598 r + PCI_IOV_RESOURCES, res,
599 conflict->name, conflict);
600 res->flags |= IORESOURCE_UNSET;
605 static void pseries_pci_fixup_resources(struct pci_dev *pdev)
608 struct device_node *dn = pci_device_to_OF_node(pdev);
610 /*Firmware must support open sriov otherwise dont configure*/
611 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
614 /* Assign the addresses from device tree*/
615 of_pci_set_vf_bar_size(pdev, indexes);
618 static void pseries_pci_fixup_iov_resources(struct pci_dev *pdev)
621 struct device_node *dn = pci_device_to_OF_node(pdev);
623 if (!pdev->is_physfn || pdev->is_added)
625 /*Firmware must support open sriov otherwise dont configure*/
626 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
629 /* Assign the addresses from device tree*/
630 of_pci_parse_iov_addrs(pdev, indexes);
633 static resource_size_t pseries_pci_iov_resource_alignment(struct pci_dev *pdev,
637 struct device_node *dn = pci_device_to_OF_node(pdev);
639 /*Firmware must support open sriov otherwise report regular alignment*/
640 reg = of_get_property(dn, "ibm,is-open-sriov-pf", NULL);
642 return pci_iov_resource_size(pdev, resno);
644 if (!pdev->is_physfn)
646 return pseries_get_iov_fw_value(pdev,
647 resno - PCI_IOV_RESOURCES,
652 static void __init pSeries_setup_arch(void)
654 set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT);
656 /* Discover PIC type and setup ppc_md accordingly */
660 /* openpic global configuration register (64-bit format). */
661 /* openpic Interrupt Source Unit pointer (64-bit format). */
662 /* python0 facility area (mmio) (64-bit format) REAL address. */
664 /* init to some ~sane value until calibrate_delay() runs */
665 loops_per_jiffy = 50000000;
669 pseries_setup_rfi_flush();
671 /* By default, only probe PCI (can be overridden by rtas_pci) */
672 pci_add_flags(PCI_PROBE_ONLY);
674 /* Find and initialize PCI host bridges */
675 init_pci_config_tokens();
676 find_and_init_phbs();
677 of_reconfig_notifier_register(&pci_dn_reconfig_nb);
679 pSeries_nvram_init();
681 if (firmware_has_feature(FW_FEATURE_LPAR)) {
682 vpa_init(boot_cpuid);
683 ppc_md.power_save = pseries_lpar_idle;
684 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
685 #ifdef CONFIG_PCI_IOV
686 ppc_md.pcibios_fixup_resources =
687 pseries_pci_fixup_resources;
688 ppc_md.pcibios_fixup_sriov =
689 pseries_pci_fixup_iov_resources;
690 ppc_md.pcibios_iov_resource_alignment =
691 pseries_pci_iov_resource_alignment;
694 /* No special idle routine */
695 ppc_md.enable_pmcs = power4_enable_pmcs;
698 ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare;
701 static void pseries_panic(char *str)
703 panic_flush_kmsg_end();
707 static int __init pSeries_init_panel(void)
709 /* Manually leave the kernel version on the panel. */
710 #ifdef __BIG_ENDIAN__
711 ppc_md.progress("Linux ppc64\n", 0);
713 ppc_md.progress("Linux ppc64le\n", 0);
715 ppc_md.progress(init_utsname()->version, 0);
719 machine_arch_initcall(pseries, pSeries_init_panel);
721 static int pseries_set_dabr(unsigned long dabr, unsigned long dabrx)
723 return plpar_hcall_norets(H_SET_DABR, dabr);
726 static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx)
728 /* Have to set at least one bit in the DABRX according to PAPR */
729 if (dabrx == 0 && dabr == 0)
731 /* PAPR says we can only set kernel and user bits */
732 dabrx &= DABRX_KERNEL | DABRX_USER;
734 return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx);
737 static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx)
739 /* PAPR says we can't set HYP */
742 return plapr_set_watchpoint0(dawr, dawrx);
745 #define CMO_CHARACTERISTICS_TOKEN 44
746 #define CMO_MAXLENGTH 1026
748 void pSeries_coalesce_init(void)
750 struct hvcall_mpp_x_data mpp_x_data;
752 if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data))
753 powerpc_firmware_features |= FW_FEATURE_XCMO;
755 powerpc_firmware_features &= ~FW_FEATURE_XCMO;
759 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
760 * handle that here. (Stolen from parse_system_parameter_string)
762 static void pSeries_cmo_feature_init(void)
764 char *ptr, *key, *value, *end;
766 int page_order = IOMMU_PAGE_SHIFT_4K;
768 pr_debug(" -> fw_cmo_feature_init()\n");
769 spin_lock(&rtas_data_buf_lock);
770 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
771 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
773 CMO_CHARACTERISTICS_TOKEN,
777 if (call_status != 0) {
778 spin_unlock(&rtas_data_buf_lock);
779 pr_debug("CMO not available\n");
780 pr_debug(" <- fw_cmo_feature_init()\n");
784 end = rtas_data_buf + CMO_MAXLENGTH - 2;
785 ptr = rtas_data_buf + 2; /* step over strlen value */
788 while (*ptr && (ptr <= end)) {
789 /* Separate the key and value by replacing '=' with '\0' and
790 * point the value at the string after the '='
795 } else if (ptr[0] == '\0' || ptr[0] == ',') {
796 /* Terminate the string containing the key/value pair */
800 pr_debug("Malformed key/value pair\n");
801 /* Never found a '=', end processing */
805 if (0 == strcmp(key, "CMOPageSize"))
806 page_order = simple_strtol(value, NULL, 10);
807 else if (0 == strcmp(key, "PrPSP"))
808 CMO_PrPSP = simple_strtol(value, NULL, 10);
809 else if (0 == strcmp(key, "SecPSP"))
810 CMO_SecPSP = simple_strtol(value, NULL, 10);
811 value = key = ptr + 1;
816 /* Page size is returned as the power of 2 of the page size,
817 * convert to the page size in bytes before returning
819 CMO_PageSize = 1 << page_order;
820 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize);
822 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) {
823 pr_info("CMO enabled\n");
824 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
826 powerpc_firmware_features |= FW_FEATURE_CMO;
827 pSeries_coalesce_init();
829 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
831 spin_unlock(&rtas_data_buf_lock);
832 pr_debug(" <- fw_cmo_feature_init()\n");
836 * Early initialization. Relocation is on but do not reference unbolted pages
838 static void __init pseries_init(void)
840 pr_debug(" -> pseries_init()\n");
842 #ifdef CONFIG_HVC_CONSOLE
843 if (firmware_has_feature(FW_FEATURE_LPAR))
844 hvc_vio_init_early();
846 if (firmware_has_feature(FW_FEATURE_XDABR))
847 ppc_md.set_dabr = pseries_set_xdabr;
848 else if (firmware_has_feature(FW_FEATURE_DABR))
849 ppc_md.set_dabr = pseries_set_dabr;
851 if (firmware_has_feature(FW_FEATURE_SET_MODE))
852 ppc_md.set_dawr = pseries_set_dawr;
854 pSeries_cmo_feature_init();
855 iommu_init_early_pSeries();
857 pr_debug(" <- pseries_init()\n");
861 * pseries_power_off - tell firmware about how to power off the system.
863 * This function calls either the power-off rtas token in normal cases
864 * or the ibm,power-off-ups token (if present & requested) in case of
865 * a power failure. If power-off token is used, power on will only be
866 * possible with power button press. If ibm,power-off-ups token is used
867 * it will allow auto poweron after power is restored.
869 static void pseries_power_off(void)
872 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
874 if (rtas_flash_term_hook)
875 rtas_flash_term_hook(SYS_POWER_OFF);
877 if (rtas_poweron_auto == 0 ||
878 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
879 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
880 printk(KERN_INFO "RTAS power-off returned %d\n", rc);
882 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
883 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
888 static int __init pSeries_probe(void)
890 const char *dtype = of_get_property(of_root, "device_type", NULL);
894 if (strcmp(dtype, "chrp"))
897 /* Cell blades firmware claims to be chrp while it's not. Until this
898 * is fixed, we need to avoid those here.
900 if (of_machine_is_compatible("IBM,CPBW-1.0") ||
901 of_machine_is_compatible("IBM,CBEA"))
904 pm_power_off = pseries_power_off;
906 pr_debug("Machine is%s LPAR !\n",
907 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
914 static int pSeries_pci_probe_mode(struct pci_bus *bus)
916 if (firmware_has_feature(FW_FEATURE_LPAR))
917 return PCI_PROBE_DEVTREE;
918 return PCI_PROBE_NORMAL;
921 struct pci_controller_ops pseries_pci_controller_ops = {
922 .probe_mode = pSeries_pci_probe_mode,
925 define_machine(pseries) {
927 .probe = pSeries_probe,
928 .setup_arch = pSeries_setup_arch,
929 .init_IRQ = pseries_init_irq,
930 .show_cpuinfo = pSeries_show_cpuinfo,
931 .log_error = pSeries_log_error,
932 .pcibios_fixup = pSeries_final_fixup,
933 .restart = rtas_restart,
935 .panic = pseries_panic,
936 .get_boot_time = rtas_get_boot_time,
937 .get_rtc_time = rtas_get_rtc_time,
938 .set_rtc_time = rtas_set_rtc_time,
939 .calibrate_decr = generic_calibrate_decr,
940 .progress = rtas_progress,
941 .system_reset_exception = pSeries_system_reset_exception,
942 .machine_check_exception = pSeries_machine_check_exception,
943 #ifdef CONFIG_KEXEC_CORE
944 .machine_kexec = pSeries_machine_kexec,
945 .kexec_cpu_down = pseries_kexec_cpu_down,
947 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
948 .memory_block_size = pseries_memory_block_size,