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>
71 #include <asm/security_features.h>
77 unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K);
78 EXPORT_SYMBOL(CMO_PageSize);
80 int fwnmi_active; /* TRUE if an FWNMI handler is present */
82 static void pSeries_show_cpuinfo(struct seq_file *m)
84 struct device_node *root;
85 const char *model = "";
87 root = of_find_node_by_path("/");
89 model = of_get_property(root, "model", NULL);
90 seq_printf(m, "machine\t\t: CHRP %s\n", model);
93 seq_printf(m, "MMU\t\t: Radix\n");
95 seq_printf(m, "MMU\t\t: Hash\n");
98 /* Initialize firmware assisted non-maskable interrupts if
99 * the firmware supports this feature.
101 static void __init fwnmi_init(void)
103 unsigned long system_reset_addr, machine_check_addr;
105 int ibm_nmi_register = rtas_token("ibm,nmi-register");
106 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
109 /* If the kernel's not linked at zero we point the firmware at low
110 * addresses anyway, and use a trampoline to get to the real code. */
111 system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START;
112 machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START;
114 if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr,
119 static void pseries_8259_cascade(struct irq_desc *desc)
121 struct irq_chip *chip = irq_desc_get_chip(desc);
122 unsigned int cascade_irq = i8259_irq();
125 generic_handle_irq(cascade_irq);
127 chip->irq_eoi(&desc->irq_data);
130 static void __init pseries_setup_i8259_cascade(void)
132 struct device_node *np, *old, *found = NULL;
133 unsigned int cascade;
135 unsigned long intack = 0;
138 for_each_node_by_type(np, "interrupt-controller") {
139 if (of_device_is_compatible(np, "chrp,iic")) {
146 printk(KERN_DEBUG "pic: no ISA interrupt controller\n");
150 cascade = irq_of_parse_and_map(found, 0);
152 printk(KERN_ERR "pic: failed to map cascade interrupt");
155 pr_debug("pic: cascade mapped to irq %d\n", cascade);
157 for (old = of_node_get(found); old != NULL ; old = np) {
158 np = of_get_parent(old);
162 if (strcmp(np->name, "pci") != 0)
164 addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
167 naddr = of_n_addr_cells(np);
168 intack = addrp[naddr-1];
170 intack |= ((unsigned long)addrp[naddr-2]) << 32;
173 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack);
174 i8259_init(found, intack);
176 irq_set_chained_handler(cascade, pseries_8259_cascade);
179 static void __init pseries_init_irq(void)
181 /* Try using a XIVE if available, otherwise use a XICS */
182 if (!xive_spapr_init()) {
184 pseries_setup_i8259_cascade();
188 static void pseries_lpar_enable_pmcs(void)
190 unsigned long set, reset;
194 plpar_hcall_norets(H_PERFMON, set, reset);
197 static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data)
199 struct of_reconfig_data *rd = data;
200 struct device_node *parent, *np = rd->dn;
205 case OF_RECONFIG_ATTACH_NODE:
206 parent = of_get_parent(np);
207 pdn = parent ? PCI_DN(parent) : NULL;
209 pci_add_device_node_info(pdn->phb, np);
213 case OF_RECONFIG_DETACH_NODE:
216 list_del(&pdn->list);
225 static struct notifier_block pci_dn_reconfig_nb = {
226 .notifier_call = pci_dn_reconfig_notifier,
229 struct kmem_cache *dtl_cache;
231 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
233 * Allocate space for the dispatch trace log for all possible cpus
234 * and register the buffers with the hypervisor. This is used for
235 * computing time stolen by the hypervisor.
237 static int alloc_dispatch_logs(void)
240 struct paca_struct *pp;
241 struct dtl_entry *dtl;
243 if (!firmware_has_feature(FW_FEATURE_SPLPAR))
249 for_each_possible_cpu(cpu) {
251 dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL);
253 pr_warn("Failed to allocate dispatch trace log for cpu %d\n",
255 pr_warn("Stolen time statistics will be unreliable\n");
260 pp->dispatch_log = dtl;
261 pp->dispatch_log_end = dtl + N_DISPATCH_LOG;
265 /* Register the DTL for the current (boot) cpu */
266 dtl = get_paca()->dispatch_log;
267 get_paca()->dtl_ridx = 0;
268 get_paca()->dtl_curr = dtl;
269 get_paca()->lppaca_ptr->dtl_idx = 0;
271 /* hypervisor reads buffer length from this field */
272 dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES);
273 ret = register_dtl(hard_smp_processor_id(), __pa(dtl));
275 pr_err("WARNING: DTL registration of cpu %d (hw %d) failed "
276 "with %d\n", smp_processor_id(),
277 hard_smp_processor_id(), ret);
278 get_paca()->lppaca_ptr->dtl_enable_mask = 2;
282 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
283 static inline int alloc_dispatch_logs(void)
287 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
289 static int alloc_dispatch_log_kmem_cache(void)
291 dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES,
292 DISPATCH_LOG_BYTES, 0, NULL);
294 pr_warn("Failed to create dispatch trace log buffer cache\n");
295 pr_warn("Stolen time statistics will be unreliable\n");
299 return alloc_dispatch_logs();
301 machine_early_initcall(pseries, alloc_dispatch_log_kmem_cache);
303 static void pseries_lpar_idle(void)
306 * Default handler to go into low thread priority and possibly
307 * low power mode by ceding processor to hypervisor
310 /* Indicate to hypervisor that we are idle. */
311 get_lppaca()->idle = 1;
314 * Yield the processor to the hypervisor. We return if
315 * an external interrupt occurs (which are driven prior
316 * to returning here) or if a prod occurs from another
317 * processor. When returning here, external interrupts
322 get_lppaca()->idle = 0;
326 * Enable relocation on during exceptions. This has partition wide scope and
327 * may take a while to complete, if it takes longer than one second we will
328 * just give up rather than wasting any more time on this - if that turns out
329 * to ever be a problem in practice we can move this into a kernel thread to
330 * finish off the process later in boot.
332 void pseries_enable_reloc_on_exc(void)
335 unsigned int delay, total_delay = 0;
338 rc = enable_reloc_on_exceptions();
339 if (!H_IS_LONG_BUSY(rc)) {
341 pr_info("Relocation on exceptions not"
343 } else if (rc != H_SUCCESS) {
344 pr_warn("Unable to enable relocation"
345 " on exceptions: %ld\n", rc);
350 delay = get_longbusy_msecs(rc);
351 total_delay += delay;
352 if (total_delay > 1000) {
353 pr_warn("Warning: Giving up waiting to enable "
354 "relocation on exceptions (%u msec)!\n",
362 EXPORT_SYMBOL(pseries_enable_reloc_on_exc);
364 void pseries_disable_reloc_on_exc(void)
369 rc = disable_reloc_on_exceptions();
370 if (!H_IS_LONG_BUSY(rc))
372 mdelay(get_longbusy_msecs(rc));
375 pr_warn("Warning: Failed to disable relocation on exceptions: %ld\n",
378 EXPORT_SYMBOL(pseries_disable_reloc_on_exc);
380 #ifdef CONFIG_KEXEC_CORE
381 static void pSeries_machine_kexec(struct kimage *image)
383 if (firmware_has_feature(FW_FEATURE_SET_MODE))
384 pseries_disable_reloc_on_exc();
386 default_machine_kexec(image);
390 #ifdef __LITTLE_ENDIAN__
391 void pseries_big_endian_exceptions(void)
396 rc = enable_big_endian_exceptions();
397 if (!H_IS_LONG_BUSY(rc))
399 mdelay(get_longbusy_msecs(rc));
403 * At this point it is unlikely panic() will get anything
404 * out to the user, since this is called very late in kexec
405 * but at least this will stop us from continuing on further
406 * and creating an even more difficult to debug situation.
408 * There is a known problem when kdump'ing, if cpus are offline
409 * the above call will fail. Rather than panicking again, keep
410 * going and hope the kdump kernel is also little endian, which
413 if (rc && !kdump_in_progress())
414 panic("Could not enable big endian exceptions");
417 void pseries_little_endian_exceptions(void)
422 rc = enable_little_endian_exceptions();
423 if (!H_IS_LONG_BUSY(rc))
425 mdelay(get_longbusy_msecs(rc));
428 ppc_md.progress("H_SET_MODE LE exception fail", 0);
429 panic("Could not enable little endian exceptions");
434 static void __init find_and_init_phbs(void)
436 struct device_node *node;
437 struct pci_controller *phb;
438 struct device_node *root = of_find_node_by_path("/");
440 for_each_child_of_node(root, node) {
441 if (node->type == NULL || (strcmp(node->type, "pci") != 0 &&
442 strcmp(node->type, "pciex") != 0))
445 phb = pcibios_alloc_controller(node);
449 pci_process_bridge_OF_ranges(phb, node, 0);
450 isa_bridge_find_early(phb);
451 phb->controller_ops = pseries_pci_controller_ops;
457 * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties
460 of_pci_check_probe_only();
463 static void init_cpu_char_feature_flags(struct h_cpu_char_result *result)
465 if (result->character & H_CPU_CHAR_SPEC_BAR_ORI31)
466 security_ftr_set(SEC_FTR_SPEC_BAR_ORI31);
468 if (result->character & H_CPU_CHAR_BCCTRL_SERIALISED)
469 security_ftr_set(SEC_FTR_BCCTRL_SERIALISED);
471 if (result->character & H_CPU_CHAR_L1D_FLUSH_ORI30)
472 security_ftr_set(SEC_FTR_L1D_FLUSH_ORI30);
474 if (result->character & H_CPU_CHAR_L1D_FLUSH_TRIG2)
475 security_ftr_set(SEC_FTR_L1D_FLUSH_TRIG2);
477 if (result->character & H_CPU_CHAR_L1D_THREAD_PRIV)
478 security_ftr_set(SEC_FTR_L1D_THREAD_PRIV);
480 if (result->character & H_CPU_CHAR_COUNT_CACHE_DISABLED)
481 security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED);
484 * The features below are enabled by default, so we instead look to see
485 * if firmware has *disabled* them, and clear them if so.
487 if (!(result->behaviour & H_CPU_BEHAV_FAVOUR_SECURITY))
488 security_ftr_clear(SEC_FTR_FAVOUR_SECURITY);
490 if (!(result->behaviour & H_CPU_BEHAV_L1D_FLUSH_PR))
491 security_ftr_clear(SEC_FTR_L1D_FLUSH_PR);
493 if (!(result->behaviour & H_CPU_BEHAV_BNDS_CHK_SPEC_BAR))
494 security_ftr_clear(SEC_FTR_BNDS_CHK_SPEC_BAR);
497 void pseries_setup_rfi_flush(void)
499 struct h_cpu_char_result result;
500 enum l1d_flush_type types;
504 rc = plpar_get_cpu_characteristics(&result);
506 init_cpu_char_feature_flags(&result);
509 * We're the guest so this doesn't apply to us, clear it to simplify
510 * handling of it elsewhere.
512 security_ftr_clear(SEC_FTR_L1D_FLUSH_HV);
514 types = L1D_FLUSH_FALLBACK;
516 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_TRIG2))
517 types |= L1D_FLUSH_MTTRIG;
519 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_ORI30))
520 types |= L1D_FLUSH_ORI;
522 enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) && \
523 security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR);
525 setup_rfi_flush(types, enable);
528 #ifdef CONFIG_PCI_IOV
529 enum rtas_iov_fw_value_map {
530 NUM_RES_PROPERTY = 0, /* Number of Resources */
531 LOW_INT = 1, /* Lowest 32 bits of Address */
532 START_OF_ENTRIES = 2, /* Always start of entry */
533 APERTURE_PROPERTY = 2, /* Start of entry+ to Aperture Size */
534 WDW_SIZE_PROPERTY = 4, /* Start of entry+ to Window Size */
535 NEXT_ENTRY = 7 /* Go to next entry on array */
538 enum get_iov_fw_value_index {
539 BAR_ADDRS = 1, /* Get Bar Address */
540 APERTURE_SIZE = 2, /* Get Aperture Size */
541 WDW_SIZE = 3 /* Get Window Size */
544 resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno,
545 enum get_iov_fw_value_index value)
548 struct device_node *dn = pci_device_to_OF_node(dev);
549 int i, num_res, ret = 0;
551 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
556 * First element in the array is the number of Bars
557 * returned. Search through the list to find the matching
560 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
561 if (resno >= num_res)
562 return 0; /* or an errror */
564 i = START_OF_ENTRIES + NEXT_ENTRY * resno;
567 ret = of_read_number(&indexes[i], 2);
570 ret = of_read_number(&indexes[i + APERTURE_PROPERTY], 2);
573 ret = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2);
580 void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes)
582 struct resource *res;
583 resource_size_t base, size;
586 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
587 num_res = min_t(int, num_res, PCI_SRIOV_NUM_BARS);
588 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS;
589 i += NEXT_ENTRY, r++) {
590 res = &dev->resource[r + PCI_IOV_RESOURCES];
591 base = of_read_number(&indexes[i], 2);
592 size = of_read_number(&indexes[i + APERTURE_PROPERTY], 2);
593 res->flags = pci_parse_of_flags(of_read_number
594 (&indexes[i + LOW_INT], 1), 0);
595 res->flags |= (IORESOURCE_MEM_64 | IORESOURCE_PCI_FIXED);
596 res->name = pci_name(dev);
598 res->end = base + size - 1;
602 void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes)
604 struct resource *res, *root, *conflict;
605 resource_size_t base, size;
609 * First element in the array is the number of Bars
610 * returned. Search through the list to find the matching
611 * bars assign them from firmware into resources structure.
613 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
614 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS;
615 i += NEXT_ENTRY, r++) {
616 res = &dev->resource[r + PCI_IOV_RESOURCES];
617 base = of_read_number(&indexes[i], 2);
618 size = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2);
619 res->name = pci_name(dev);
621 res->end = base + size - 1;
622 root = &iomem_resource;
624 "pSeries IOV BAR %d: trying firmware assignment %pR\n",
625 r + PCI_IOV_RESOURCES, res);
626 conflict = request_resource_conflict(root, res);
629 "BAR %d: %pR conflicts with %s %pR\n",
630 r + PCI_IOV_RESOURCES, res,
631 conflict->name, conflict);
632 res->flags |= IORESOURCE_UNSET;
637 static void pseries_pci_fixup_resources(struct pci_dev *pdev)
640 struct device_node *dn = pci_device_to_OF_node(pdev);
642 /*Firmware must support open sriov otherwise dont configure*/
643 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
646 /* Assign the addresses from device tree*/
647 of_pci_set_vf_bar_size(pdev, indexes);
650 static void pseries_pci_fixup_iov_resources(struct pci_dev *pdev)
653 struct device_node *dn = pci_device_to_OF_node(pdev);
655 if (!pdev->is_physfn || pdev->is_added)
657 /*Firmware must support open sriov otherwise dont configure*/
658 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
661 /* Assign the addresses from device tree*/
662 of_pci_parse_iov_addrs(pdev, indexes);
665 static resource_size_t pseries_pci_iov_resource_alignment(struct pci_dev *pdev,
669 struct device_node *dn = pci_device_to_OF_node(pdev);
671 /*Firmware must support open sriov otherwise report regular alignment*/
672 reg = of_get_property(dn, "ibm,is-open-sriov-pf", NULL);
674 return pci_iov_resource_size(pdev, resno);
676 if (!pdev->is_physfn)
678 return pseries_get_iov_fw_value(pdev,
679 resno - PCI_IOV_RESOURCES,
684 static void __init pSeries_setup_arch(void)
686 set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT);
688 /* Discover PIC type and setup ppc_md accordingly */
692 /* openpic global configuration register (64-bit format). */
693 /* openpic Interrupt Source Unit pointer (64-bit format). */
694 /* python0 facility area (mmio) (64-bit format) REAL address. */
696 /* init to some ~sane value until calibrate_delay() runs */
697 loops_per_jiffy = 50000000;
701 pseries_setup_rfi_flush();
703 /* By default, only probe PCI (can be overridden by rtas_pci) */
704 pci_add_flags(PCI_PROBE_ONLY);
706 /* Find and initialize PCI host bridges */
707 init_pci_config_tokens();
708 find_and_init_phbs();
709 of_reconfig_notifier_register(&pci_dn_reconfig_nb);
711 pSeries_nvram_init();
713 if (firmware_has_feature(FW_FEATURE_LPAR)) {
714 vpa_init(boot_cpuid);
715 ppc_md.power_save = pseries_lpar_idle;
716 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
717 #ifdef CONFIG_PCI_IOV
718 ppc_md.pcibios_fixup_resources =
719 pseries_pci_fixup_resources;
720 ppc_md.pcibios_fixup_sriov =
721 pseries_pci_fixup_iov_resources;
722 ppc_md.pcibios_iov_resource_alignment =
723 pseries_pci_iov_resource_alignment;
726 /* No special idle routine */
727 ppc_md.enable_pmcs = power4_enable_pmcs;
730 ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare;
733 static void pseries_panic(char *str)
735 panic_flush_kmsg_end();
739 static int __init pSeries_init_panel(void)
741 /* Manually leave the kernel version on the panel. */
742 #ifdef __BIG_ENDIAN__
743 ppc_md.progress("Linux ppc64\n", 0);
745 ppc_md.progress("Linux ppc64le\n", 0);
747 ppc_md.progress(init_utsname()->version, 0);
751 machine_arch_initcall(pseries, pSeries_init_panel);
753 static int pseries_set_dabr(unsigned long dabr, unsigned long dabrx)
755 return plpar_hcall_norets(H_SET_DABR, dabr);
758 static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx)
760 /* Have to set at least one bit in the DABRX according to PAPR */
761 if (dabrx == 0 && dabr == 0)
763 /* PAPR says we can only set kernel and user bits */
764 dabrx &= DABRX_KERNEL | DABRX_USER;
766 return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx);
769 static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx)
771 /* PAPR says we can't set HYP */
774 return plpar_set_watchpoint0(dawr, dawrx);
777 #define CMO_CHARACTERISTICS_TOKEN 44
778 #define CMO_MAXLENGTH 1026
780 void pSeries_coalesce_init(void)
782 struct hvcall_mpp_x_data mpp_x_data;
784 if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data))
785 powerpc_firmware_features |= FW_FEATURE_XCMO;
787 powerpc_firmware_features &= ~FW_FEATURE_XCMO;
791 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
792 * handle that here. (Stolen from parse_system_parameter_string)
794 static void pSeries_cmo_feature_init(void)
796 char *ptr, *key, *value, *end;
798 int page_order = IOMMU_PAGE_SHIFT_4K;
800 pr_debug(" -> fw_cmo_feature_init()\n");
801 spin_lock(&rtas_data_buf_lock);
802 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
803 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
805 CMO_CHARACTERISTICS_TOKEN,
809 if (call_status != 0) {
810 spin_unlock(&rtas_data_buf_lock);
811 pr_debug("CMO not available\n");
812 pr_debug(" <- fw_cmo_feature_init()\n");
816 end = rtas_data_buf + CMO_MAXLENGTH - 2;
817 ptr = rtas_data_buf + 2; /* step over strlen value */
820 while (*ptr && (ptr <= end)) {
821 /* Separate the key and value by replacing '=' with '\0' and
822 * point the value at the string after the '='
827 } else if (ptr[0] == '\0' || ptr[0] == ',') {
828 /* Terminate the string containing the key/value pair */
832 pr_debug("Malformed key/value pair\n");
833 /* Never found a '=', end processing */
837 if (0 == strcmp(key, "CMOPageSize"))
838 page_order = simple_strtol(value, NULL, 10);
839 else if (0 == strcmp(key, "PrPSP"))
840 CMO_PrPSP = simple_strtol(value, NULL, 10);
841 else if (0 == strcmp(key, "SecPSP"))
842 CMO_SecPSP = simple_strtol(value, NULL, 10);
843 value = key = ptr + 1;
848 /* Page size is returned as the power of 2 of the page size,
849 * convert to the page size in bytes before returning
851 CMO_PageSize = 1 << page_order;
852 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize);
854 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) {
855 pr_info("CMO enabled\n");
856 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
858 powerpc_firmware_features |= FW_FEATURE_CMO;
859 pSeries_coalesce_init();
861 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
863 spin_unlock(&rtas_data_buf_lock);
864 pr_debug(" <- fw_cmo_feature_init()\n");
868 * Early initialization. Relocation is on but do not reference unbolted pages
870 static void __init pseries_init(void)
872 pr_debug(" -> pseries_init()\n");
874 #ifdef CONFIG_HVC_CONSOLE
875 if (firmware_has_feature(FW_FEATURE_LPAR))
876 hvc_vio_init_early();
878 if (firmware_has_feature(FW_FEATURE_XDABR))
879 ppc_md.set_dabr = pseries_set_xdabr;
880 else if (firmware_has_feature(FW_FEATURE_DABR))
881 ppc_md.set_dabr = pseries_set_dabr;
883 if (firmware_has_feature(FW_FEATURE_SET_MODE))
884 ppc_md.set_dawr = pseries_set_dawr;
886 pSeries_cmo_feature_init();
887 iommu_init_early_pSeries();
889 pr_debug(" <- pseries_init()\n");
893 * pseries_power_off - tell firmware about how to power off the system.
895 * This function calls either the power-off rtas token in normal cases
896 * or the ibm,power-off-ups token (if present & requested) in case of
897 * a power failure. If power-off token is used, power on will only be
898 * possible with power button press. If ibm,power-off-ups token is used
899 * it will allow auto poweron after power is restored.
901 static void pseries_power_off(void)
904 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
906 if (rtas_flash_term_hook)
907 rtas_flash_term_hook(SYS_POWER_OFF);
909 if (rtas_poweron_auto == 0 ||
910 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
911 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
912 printk(KERN_INFO "RTAS power-off returned %d\n", rc);
914 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
915 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
920 static int __init pSeries_probe(void)
922 const char *dtype = of_get_property(of_root, "device_type", NULL);
926 if (strcmp(dtype, "chrp"))
929 /* Cell blades firmware claims to be chrp while it's not. Until this
930 * is fixed, we need to avoid those here.
932 if (of_machine_is_compatible("IBM,CPBW-1.0") ||
933 of_machine_is_compatible("IBM,CBEA"))
936 pm_power_off = pseries_power_off;
938 pr_debug("Machine is%s LPAR !\n",
939 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
946 static int pSeries_pci_probe_mode(struct pci_bus *bus)
948 if (firmware_has_feature(FW_FEATURE_LPAR))
949 return PCI_PROBE_DEVTREE;
950 return PCI_PROBE_NORMAL;
953 struct pci_controller_ops pseries_pci_controller_ops = {
954 .probe_mode = pSeries_pci_probe_mode,
957 define_machine(pseries) {
959 .probe = pSeries_probe,
960 .setup_arch = pSeries_setup_arch,
961 .init_IRQ = pseries_init_irq,
962 .show_cpuinfo = pSeries_show_cpuinfo,
963 .log_error = pSeries_log_error,
964 .pcibios_fixup = pSeries_final_fixup,
965 .restart = rtas_restart,
967 .panic = pseries_panic,
968 .get_boot_time = rtas_get_boot_time,
969 .get_rtc_time = rtas_get_rtc_time,
970 .set_rtc_time = rtas_set_rtc_time,
971 .calibrate_decr = generic_calibrate_decr,
972 .progress = rtas_progress,
973 .system_reset_exception = pSeries_system_reset_exception,
974 .machine_check_exception = pSeries_machine_check_exception,
975 #ifdef CONFIG_KEXEC_CORE
976 .machine_kexec = pSeries_machine_kexec,
977 .kexec_cpu_down = pseries_kexec_cpu_down,
979 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
980 .memory_block_size = pseries_memory_block_size,