1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * 64-bit pSeries and RS/6000 setup code.
5 * Copyright (C) 1995 Linus Torvalds
6 * Adapted from 'alpha' version by Gary Thomas
7 * Modified by Cort Dougan (cort@cs.nmt.edu)
8 * Modified by PPC64 Team, IBM Corp
12 * bootup setup stuff..
15 #include <linux/cpu.h>
16 #include <linux/errno.h>
17 #include <linux/sched.h>
18 #include <linux/kernel.h>
20 #include <linux/stddef.h>
21 #include <linux/unistd.h>
22 #include <linux/user.h>
23 #include <linux/tty.h>
24 #include <linux/major.h>
25 #include <linux/interrupt.h>
26 #include <linux/reboot.h>
27 #include <linux/init.h>
28 #include <linux/ioport.h>
29 #include <linux/console.h>
30 #include <linux/pci.h>
31 #include <linux/utsname.h>
32 #include <linux/adb.h>
33 #include <linux/export.h>
34 #include <linux/delay.h>
35 #include <linux/irq.h>
36 #include <linux/seq_file.h>
37 #include <linux/root_dev.h>
39 #include <linux/of_pci.h>
40 #include <linux/memblock.h>
41 #include <linux/swiotlb.h>
44 #include <asm/processor.h>
48 #include <asm/pci-bridge.h>
49 #include <asm/iommu.h>
51 #include <asm/machdep.h>
54 #include <asm/nvram.h>
58 #include <asm/ppc-pci.h>
59 #include <asm/i8259.h>
62 #include <asm/firmware.h>
65 #include <asm/plpar_wrappers.h>
66 #include <asm/kexec.h>
67 #include <asm/isa-bridge.h>
68 #include <asm/security_features.h>
69 #include <asm/asm-const.h>
71 #include <asm/swiotlb.h>
75 #include "../../../../drivers/pci/pci.h"
77 DEFINE_STATIC_KEY_FALSE(shared_processor);
78 EXPORT_SYMBOL_GPL(shared_processor);
82 unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K);
83 EXPORT_SYMBOL(CMO_PageSize);
85 int fwnmi_active; /* TRUE if an FWNMI handler is present */
86 int ibm_nmi_interlock_token;
88 static void pSeries_show_cpuinfo(struct seq_file *m)
90 struct device_node *root;
91 const char *model = "";
93 root = of_find_node_by_path("/");
95 model = of_get_property(root, "model", NULL);
96 seq_printf(m, "machine\t\t: CHRP %s\n", model);
99 seq_printf(m, "MMU\t\t: Radix\n");
101 seq_printf(m, "MMU\t\t: Hash\n");
104 /* Initialize firmware assisted non-maskable interrupts if
105 * the firmware supports this feature.
107 static void __init fwnmi_init(void)
109 unsigned long system_reset_addr, machine_check_addr;
112 int nr_cpus = num_possible_cpus();
113 #ifdef CONFIG_PPC_BOOK3S_64
114 struct slb_entry *slb_ptr;
117 int ibm_nmi_register_token;
119 ibm_nmi_register_token = rtas_token("ibm,nmi-register");
120 if (ibm_nmi_register_token == RTAS_UNKNOWN_SERVICE)
123 ibm_nmi_interlock_token = rtas_token("ibm,nmi-interlock");
124 if (WARN_ON(ibm_nmi_interlock_token == RTAS_UNKNOWN_SERVICE))
127 /* If the kernel's not linked at zero we point the firmware at low
128 * addresses anyway, and use a trampoline to get to the real code. */
129 system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START;
130 machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START;
132 if (0 == rtas_call(ibm_nmi_register_token, 2, 1, NULL,
133 system_reset_addr, machine_check_addr))
137 * Allocate a chunk for per cpu buffer to hold rtas errorlog.
138 * It will be used in real mode mce handler, hence it needs to be
141 mce_data_buf = memblock_alloc_try_nid_raw(RTAS_ERROR_LOG_MAX * nr_cpus,
142 RTAS_ERROR_LOG_MAX, MEMBLOCK_LOW_LIMIT,
143 ppc64_rma_size, NUMA_NO_NODE);
145 panic("Failed to allocate %d bytes below %pa for MCE buffer\n",
146 RTAS_ERROR_LOG_MAX * nr_cpus, &ppc64_rma_size);
148 for_each_possible_cpu(i) {
149 paca_ptrs[i]->mce_data_buf = mce_data_buf +
150 (RTAS_ERROR_LOG_MAX * i);
153 #ifdef CONFIG_PPC_BOOK3S_64
154 if (!radix_enabled()) {
155 /* Allocate per cpu area to save old slb contents during MCE */
156 size = sizeof(struct slb_entry) * mmu_slb_size * nr_cpus;
157 slb_ptr = memblock_alloc_try_nid_raw(size,
158 sizeof(struct slb_entry), MEMBLOCK_LOW_LIMIT,
159 ppc64_rma_size, NUMA_NO_NODE);
161 panic("Failed to allocate %zu bytes below %pa for slb area\n",
162 size, &ppc64_rma_size);
164 for_each_possible_cpu(i)
165 paca_ptrs[i]->mce_faulty_slbs = slb_ptr + (mmu_slb_size * i);
170 static void pseries_8259_cascade(struct irq_desc *desc)
172 struct irq_chip *chip = irq_desc_get_chip(desc);
173 unsigned int cascade_irq = i8259_irq();
176 generic_handle_irq(cascade_irq);
178 chip->irq_eoi(&desc->irq_data);
181 static void __init pseries_setup_i8259_cascade(void)
183 struct device_node *np, *old, *found = NULL;
184 unsigned int cascade;
186 unsigned long intack = 0;
189 for_each_node_by_type(np, "interrupt-controller") {
190 if (of_device_is_compatible(np, "chrp,iic")) {
197 printk(KERN_DEBUG "pic: no ISA interrupt controller\n");
201 cascade = irq_of_parse_and_map(found, 0);
203 printk(KERN_ERR "pic: failed to map cascade interrupt");
206 pr_debug("pic: cascade mapped to irq %d\n", cascade);
208 for (old = of_node_get(found); old != NULL ; old = np) {
209 np = of_get_parent(old);
213 if (!of_node_name_eq(np, "pci"))
215 addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
218 naddr = of_n_addr_cells(np);
219 intack = addrp[naddr-1];
221 intack |= ((unsigned long)addrp[naddr-2]) << 32;
224 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack);
225 i8259_init(found, intack);
227 irq_set_chained_handler(cascade, pseries_8259_cascade);
230 static void __init pseries_init_irq(void)
232 /* Try using a XIVE if available, otherwise use a XICS */
233 if (!xive_spapr_init()) {
235 pseries_setup_i8259_cascade();
239 static void pseries_lpar_enable_pmcs(void)
241 unsigned long set, reset;
245 plpar_hcall_norets(H_PERFMON, set, reset);
248 static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data)
250 struct of_reconfig_data *rd = data;
251 struct device_node *parent, *np = rd->dn;
256 case OF_RECONFIG_ATTACH_NODE:
257 parent = of_get_parent(np);
258 pdn = parent ? PCI_DN(parent) : NULL;
260 pci_add_device_node_info(pdn->phb, np);
264 case OF_RECONFIG_DETACH_NODE:
267 list_del(&pdn->list);
276 static struct notifier_block pci_dn_reconfig_nb = {
277 .notifier_call = pci_dn_reconfig_notifier,
280 struct kmem_cache *dtl_cache;
282 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
284 * Allocate space for the dispatch trace log for all possible cpus
285 * and register the buffers with the hypervisor. This is used for
286 * computing time stolen by the hypervisor.
288 static int alloc_dispatch_logs(void)
290 if (!firmware_has_feature(FW_FEATURE_SPLPAR))
296 alloc_dtl_buffers(0);
298 /* Register the DTL for the current (boot) cpu */
299 register_dtl_buffer(smp_processor_id());
303 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
304 static inline int alloc_dispatch_logs(void)
308 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
310 static int alloc_dispatch_log_kmem_cache(void)
312 void (*ctor)(void *) = get_dtl_cache_ctor();
314 dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES,
315 DISPATCH_LOG_BYTES, 0, ctor);
317 pr_warn("Failed to create dispatch trace log buffer cache\n");
318 pr_warn("Stolen time statistics will be unreliable\n");
322 return alloc_dispatch_logs();
324 machine_early_initcall(pseries, alloc_dispatch_log_kmem_cache);
326 DEFINE_PER_CPU(u64, idle_spurr_cycles);
327 DEFINE_PER_CPU(u64, idle_entry_purr_snap);
328 DEFINE_PER_CPU(u64, idle_entry_spurr_snap);
329 static void pseries_lpar_idle(void)
332 * Default handler to go into low thread priority and possibly
333 * low power mode by ceding processor to hypervisor
336 if (!prep_irq_for_idle())
339 /* Indicate to hypervisor that we are idle. */
340 pseries_idle_prolog();
343 * Yield the processor to the hypervisor. We return if
344 * an external interrupt occurs (which are driven prior
345 * to returning here) or if a prod occurs from another
346 * processor. When returning here, external interrupts
351 pseries_idle_epilog();
355 * Enable relocation on during exceptions. This has partition wide scope and
356 * may take a while to complete, if it takes longer than one second we will
357 * just give up rather than wasting any more time on this - if that turns out
358 * to ever be a problem in practice we can move this into a kernel thread to
359 * finish off the process later in boot.
361 void pseries_enable_reloc_on_exc(void)
364 unsigned int delay, total_delay = 0;
367 rc = enable_reloc_on_exceptions();
368 if (!H_IS_LONG_BUSY(rc)) {
370 pr_info("Relocation on exceptions not"
372 } else if (rc != H_SUCCESS) {
373 pr_warn("Unable to enable relocation"
374 " on exceptions: %ld\n", rc);
379 delay = get_longbusy_msecs(rc);
380 total_delay += delay;
381 if (total_delay > 1000) {
382 pr_warn("Warning: Giving up waiting to enable "
383 "relocation on exceptions (%u msec)!\n",
391 EXPORT_SYMBOL(pseries_enable_reloc_on_exc);
393 void pseries_disable_reloc_on_exc(void)
398 rc = disable_reloc_on_exceptions();
399 if (!H_IS_LONG_BUSY(rc))
401 mdelay(get_longbusy_msecs(rc));
404 pr_warn("Warning: Failed to disable relocation on exceptions: %ld\n",
407 EXPORT_SYMBOL(pseries_disable_reloc_on_exc);
409 #ifdef CONFIG_KEXEC_CORE
410 static void pSeries_machine_kexec(struct kimage *image)
412 if (firmware_has_feature(FW_FEATURE_SET_MODE))
413 pseries_disable_reloc_on_exc();
415 default_machine_kexec(image);
419 #ifdef __LITTLE_ENDIAN__
420 void pseries_big_endian_exceptions(void)
425 rc = enable_big_endian_exceptions();
426 if (!H_IS_LONG_BUSY(rc))
428 mdelay(get_longbusy_msecs(rc));
432 * At this point it is unlikely panic() will get anything
433 * out to the user, since this is called very late in kexec
434 * but at least this will stop us from continuing on further
435 * and creating an even more difficult to debug situation.
437 * There is a known problem when kdump'ing, if cpus are offline
438 * the above call will fail. Rather than panicking again, keep
439 * going and hope the kdump kernel is also little endian, which
442 if (rc && !kdump_in_progress())
443 panic("Could not enable big endian exceptions");
446 void pseries_little_endian_exceptions(void)
451 rc = enable_little_endian_exceptions();
452 if (!H_IS_LONG_BUSY(rc))
454 mdelay(get_longbusy_msecs(rc));
457 ppc_md.progress("H_SET_MODE LE exception fail", 0);
458 panic("Could not enable little endian exceptions");
463 static void __init find_and_init_phbs(void)
465 struct device_node *node;
466 struct pci_controller *phb;
467 struct device_node *root = of_find_node_by_path("/");
469 for_each_child_of_node(root, node) {
470 if (!of_node_is_type(node, "pci") &&
471 !of_node_is_type(node, "pciex"))
474 phb = pcibios_alloc_controller(node);
478 pci_process_bridge_OF_ranges(phb, node, 0);
479 isa_bridge_find_early(phb);
480 phb->controller_ops = pseries_pci_controller_ops;
486 * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties
489 of_pci_check_probe_only();
492 static void init_cpu_char_feature_flags(struct h_cpu_char_result *result)
495 * The features below are disabled by default, so we instead look to see
496 * if firmware has *enabled* them, and set them if so.
498 if (result->character & H_CPU_CHAR_SPEC_BAR_ORI31)
499 security_ftr_set(SEC_FTR_SPEC_BAR_ORI31);
501 if (result->character & H_CPU_CHAR_BCCTRL_SERIALISED)
502 security_ftr_set(SEC_FTR_BCCTRL_SERIALISED);
504 if (result->character & H_CPU_CHAR_L1D_FLUSH_ORI30)
505 security_ftr_set(SEC_FTR_L1D_FLUSH_ORI30);
507 if (result->character & H_CPU_CHAR_L1D_FLUSH_TRIG2)
508 security_ftr_set(SEC_FTR_L1D_FLUSH_TRIG2);
510 if (result->character & H_CPU_CHAR_L1D_THREAD_PRIV)
511 security_ftr_set(SEC_FTR_L1D_THREAD_PRIV);
513 if (result->character & H_CPU_CHAR_COUNT_CACHE_DISABLED)
514 security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED);
516 if (result->character & H_CPU_CHAR_BCCTR_FLUSH_ASSIST)
517 security_ftr_set(SEC_FTR_BCCTR_FLUSH_ASSIST);
519 if (result->behaviour & H_CPU_BEHAV_FLUSH_COUNT_CACHE)
520 security_ftr_set(SEC_FTR_FLUSH_COUNT_CACHE);
523 * The features below are enabled by default, so we instead look to see
524 * if firmware has *disabled* them, and clear them if so.
526 if (!(result->behaviour & H_CPU_BEHAV_FAVOUR_SECURITY))
527 security_ftr_clear(SEC_FTR_FAVOUR_SECURITY);
529 if (!(result->behaviour & H_CPU_BEHAV_L1D_FLUSH_PR))
530 security_ftr_clear(SEC_FTR_L1D_FLUSH_PR);
532 if (!(result->behaviour & H_CPU_BEHAV_BNDS_CHK_SPEC_BAR))
533 security_ftr_clear(SEC_FTR_BNDS_CHK_SPEC_BAR);
536 void pseries_setup_rfi_flush(void)
538 struct h_cpu_char_result result;
539 enum l1d_flush_type types;
544 * Set features to the defaults assumed by init_cpu_char_feature_flags()
545 * so it can set/clear again any features that might have changed after
546 * migration, and in case the hypercall fails and it is not even called.
548 powerpc_security_features = SEC_FTR_DEFAULT;
550 rc = plpar_get_cpu_characteristics(&result);
552 init_cpu_char_feature_flags(&result);
555 * We're the guest so this doesn't apply to us, clear it to simplify
556 * handling of it elsewhere.
558 security_ftr_clear(SEC_FTR_L1D_FLUSH_HV);
560 types = L1D_FLUSH_FALLBACK;
562 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_TRIG2))
563 types |= L1D_FLUSH_MTTRIG;
565 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_ORI30))
566 types |= L1D_FLUSH_ORI;
568 enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) && \
569 security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR);
571 setup_rfi_flush(types, enable);
572 setup_count_cache_flush();
575 #ifdef CONFIG_PCI_IOV
576 enum rtas_iov_fw_value_map {
577 NUM_RES_PROPERTY = 0, /* Number of Resources */
578 LOW_INT = 1, /* Lowest 32 bits of Address */
579 START_OF_ENTRIES = 2, /* Always start of entry */
580 APERTURE_PROPERTY = 2, /* Start of entry+ to Aperture Size */
581 WDW_SIZE_PROPERTY = 4, /* Start of entry+ to Window Size */
582 NEXT_ENTRY = 7 /* Go to next entry on array */
585 enum get_iov_fw_value_index {
586 BAR_ADDRS = 1, /* Get Bar Address */
587 APERTURE_SIZE = 2, /* Get Aperture Size */
588 WDW_SIZE = 3 /* Get Window Size */
591 resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno,
592 enum get_iov_fw_value_index value)
595 struct device_node *dn = pci_device_to_OF_node(dev);
596 int i, num_res, ret = 0;
598 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
603 * First element in the array is the number of Bars
604 * returned. Search through the list to find the matching
607 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
608 if (resno >= num_res)
609 return 0; /* or an errror */
611 i = START_OF_ENTRIES + NEXT_ENTRY * resno;
614 ret = of_read_number(&indexes[i], 2);
617 ret = of_read_number(&indexes[i + APERTURE_PROPERTY], 2);
620 ret = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2);
627 void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes)
629 struct resource *res;
630 resource_size_t base, size;
633 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
634 num_res = min_t(int, num_res, PCI_SRIOV_NUM_BARS);
635 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS;
636 i += NEXT_ENTRY, r++) {
637 res = &dev->resource[r + PCI_IOV_RESOURCES];
638 base = of_read_number(&indexes[i], 2);
639 size = of_read_number(&indexes[i + APERTURE_PROPERTY], 2);
640 res->flags = pci_parse_of_flags(of_read_number
641 (&indexes[i + LOW_INT], 1), 0);
642 res->flags |= (IORESOURCE_MEM_64 | IORESOURCE_PCI_FIXED);
643 res->name = pci_name(dev);
645 res->end = base + size - 1;
649 void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes)
651 struct resource *res, *root, *conflict;
652 resource_size_t base, size;
656 * First element in the array is the number of Bars
657 * returned. Search through the list to find the matching
658 * bars assign them from firmware into resources structure.
660 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
661 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS;
662 i += NEXT_ENTRY, r++) {
663 res = &dev->resource[r + PCI_IOV_RESOURCES];
664 base = of_read_number(&indexes[i], 2);
665 size = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2);
666 res->name = pci_name(dev);
668 res->end = base + size - 1;
669 root = &iomem_resource;
671 "pSeries IOV BAR %d: trying firmware assignment %pR\n",
672 r + PCI_IOV_RESOURCES, res);
673 conflict = request_resource_conflict(root, res);
676 "BAR %d: %pR conflicts with %s %pR\n",
677 r + PCI_IOV_RESOURCES, res,
678 conflict->name, conflict);
679 res->flags |= IORESOURCE_UNSET;
684 static void pseries_disable_sriov_resources(struct pci_dev *pdev)
688 pci_warn(pdev, "No hypervisor support for SR-IOV on this device, IOV BARs disabled.\n");
689 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++)
690 pdev->resource[i + PCI_IOV_RESOURCES].flags = 0;
693 static void pseries_pci_fixup_resources(struct pci_dev *pdev)
696 struct device_node *dn = pci_device_to_OF_node(pdev);
698 /*Firmware must support open sriov otherwise dont configure*/
699 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
701 of_pci_set_vf_bar_size(pdev, indexes);
703 pseries_disable_sriov_resources(pdev);
706 static void pseries_pci_fixup_iov_resources(struct pci_dev *pdev)
709 struct device_node *dn = pci_device_to_OF_node(pdev);
711 if (!pdev->is_physfn || pci_dev_is_added(pdev))
713 /*Firmware must support open sriov otherwise dont configure*/
714 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
716 of_pci_parse_iov_addrs(pdev, indexes);
718 pseries_disable_sriov_resources(pdev);
721 static resource_size_t pseries_pci_iov_resource_alignment(struct pci_dev *pdev,
725 struct device_node *dn = pci_device_to_OF_node(pdev);
727 /*Firmware must support open sriov otherwise report regular alignment*/
728 reg = of_get_property(dn, "ibm,is-open-sriov-pf", NULL);
730 return pci_iov_resource_size(pdev, resno);
732 if (!pdev->is_physfn)
734 return pseries_get_iov_fw_value(pdev,
735 resno - PCI_IOV_RESOURCES,
740 static void __init pSeries_setup_arch(void)
742 set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT);
744 /* Discover PIC type and setup ppc_md accordingly */
748 /* openpic global configuration register (64-bit format). */
749 /* openpic Interrupt Source Unit pointer (64-bit format). */
750 /* python0 facility area (mmio) (64-bit format) REAL address. */
752 /* init to some ~sane value until calibrate_delay() runs */
753 loops_per_jiffy = 50000000;
757 pseries_setup_rfi_flush();
759 pseries_lpar_read_hblkrm_characteristics();
761 /* By default, only probe PCI (can be overridden by rtas_pci) */
762 pci_add_flags(PCI_PROBE_ONLY);
764 /* Find and initialize PCI host bridges */
765 init_pci_config_tokens();
766 find_and_init_phbs();
767 of_reconfig_notifier_register(&pci_dn_reconfig_nb);
769 pSeries_nvram_init();
771 if (firmware_has_feature(FW_FEATURE_LPAR)) {
772 vpa_init(boot_cpuid);
774 if (lppaca_shared_proc(get_lppaca()))
775 static_branch_enable(&shared_processor);
777 ppc_md.power_save = pseries_lpar_idle;
778 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
779 #ifdef CONFIG_PCI_IOV
780 ppc_md.pcibios_fixup_resources =
781 pseries_pci_fixup_resources;
782 ppc_md.pcibios_fixup_sriov =
783 pseries_pci_fixup_iov_resources;
784 ppc_md.pcibios_iov_resource_alignment =
785 pseries_pci_iov_resource_alignment;
788 /* No special idle routine */
789 ppc_md.enable_pmcs = power4_enable_pmcs;
792 ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare;
794 if (swiotlb_force == SWIOTLB_FORCE)
795 ppc_swiotlb_enable = 1;
798 static void pseries_panic(char *str)
800 panic_flush_kmsg_end();
804 static int __init pSeries_init_panel(void)
806 /* Manually leave the kernel version on the panel. */
807 #ifdef __BIG_ENDIAN__
808 ppc_md.progress("Linux ppc64\n", 0);
810 ppc_md.progress("Linux ppc64le\n", 0);
812 ppc_md.progress(init_utsname()->version, 0);
816 machine_arch_initcall(pseries, pSeries_init_panel);
818 static int pseries_set_dabr(unsigned long dabr, unsigned long dabrx)
820 return plpar_hcall_norets(H_SET_DABR, dabr);
823 static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx)
825 /* Have to set at least one bit in the DABRX according to PAPR */
826 if (dabrx == 0 && dabr == 0)
828 /* PAPR says we can only set kernel and user bits */
829 dabrx &= DABRX_KERNEL | DABRX_USER;
831 return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx);
834 static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx)
836 /* PAPR says we can't set HYP */
839 return plpar_set_watchpoint0(dawr, dawrx);
842 #define CMO_CHARACTERISTICS_TOKEN 44
843 #define CMO_MAXLENGTH 1026
845 void pSeries_coalesce_init(void)
847 struct hvcall_mpp_x_data mpp_x_data;
849 if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data))
850 powerpc_firmware_features |= FW_FEATURE_XCMO;
852 powerpc_firmware_features &= ~FW_FEATURE_XCMO;
856 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
857 * handle that here. (Stolen from parse_system_parameter_string)
859 static void pSeries_cmo_feature_init(void)
861 char *ptr, *key, *value, *end;
863 int page_order = IOMMU_PAGE_SHIFT_4K;
865 pr_debug(" -> fw_cmo_feature_init()\n");
866 spin_lock(&rtas_data_buf_lock);
867 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
868 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
870 CMO_CHARACTERISTICS_TOKEN,
874 if (call_status != 0) {
875 spin_unlock(&rtas_data_buf_lock);
876 pr_debug("CMO not available\n");
877 pr_debug(" <- fw_cmo_feature_init()\n");
881 end = rtas_data_buf + CMO_MAXLENGTH - 2;
882 ptr = rtas_data_buf + 2; /* step over strlen value */
885 while (*ptr && (ptr <= end)) {
886 /* Separate the key and value by replacing '=' with '\0' and
887 * point the value at the string after the '='
892 } else if (ptr[0] == '\0' || ptr[0] == ',') {
893 /* Terminate the string containing the key/value pair */
897 pr_debug("Malformed key/value pair\n");
898 /* Never found a '=', end processing */
902 if (0 == strcmp(key, "CMOPageSize"))
903 page_order = simple_strtol(value, NULL, 10);
904 else if (0 == strcmp(key, "PrPSP"))
905 CMO_PrPSP = simple_strtol(value, NULL, 10);
906 else if (0 == strcmp(key, "SecPSP"))
907 CMO_SecPSP = simple_strtol(value, NULL, 10);
908 value = key = ptr + 1;
913 /* Page size is returned as the power of 2 of the page size,
914 * convert to the page size in bytes before returning
916 CMO_PageSize = 1 << page_order;
917 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize);
919 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) {
920 pr_info("CMO enabled\n");
921 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
923 powerpc_firmware_features |= FW_FEATURE_CMO;
924 pSeries_coalesce_init();
926 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
928 spin_unlock(&rtas_data_buf_lock);
929 pr_debug(" <- fw_cmo_feature_init()\n");
933 * Early initialization. Relocation is on but do not reference unbolted pages
935 static void __init pseries_init(void)
937 pr_debug(" -> pseries_init()\n");
939 #ifdef CONFIG_HVC_CONSOLE
940 if (firmware_has_feature(FW_FEATURE_LPAR))
941 hvc_vio_init_early();
943 if (firmware_has_feature(FW_FEATURE_XDABR))
944 ppc_md.set_dabr = pseries_set_xdabr;
945 else if (firmware_has_feature(FW_FEATURE_DABR))
946 ppc_md.set_dabr = pseries_set_dabr;
948 if (firmware_has_feature(FW_FEATURE_SET_MODE))
949 ppc_md.set_dawr = pseries_set_dawr;
951 pSeries_cmo_feature_init();
952 iommu_init_early_pSeries();
954 pr_debug(" <- pseries_init()\n");
958 * pseries_power_off - tell firmware about how to power off the system.
960 * This function calls either the power-off rtas token in normal cases
961 * or the ibm,power-off-ups token (if present & requested) in case of
962 * a power failure. If power-off token is used, power on will only be
963 * possible with power button press. If ibm,power-off-ups token is used
964 * it will allow auto poweron after power is restored.
966 static void pseries_power_off(void)
969 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
971 if (rtas_flash_term_hook)
972 rtas_flash_term_hook(SYS_POWER_OFF);
974 if (rtas_poweron_auto == 0 ||
975 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
976 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
977 printk(KERN_INFO "RTAS power-off returned %d\n", rc);
979 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
980 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
985 static int __init pSeries_probe(void)
987 if (!of_node_is_type(of_root, "chrp"))
990 /* Cell blades firmware claims to be chrp while it's not. Until this
991 * is fixed, we need to avoid those here.
993 if (of_machine_is_compatible("IBM,CPBW-1.0") ||
994 of_machine_is_compatible("IBM,CBEA"))
997 pm_power_off = pseries_power_off;
999 pr_debug("Machine is%s LPAR !\n",
1000 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
1007 static int pSeries_pci_probe_mode(struct pci_bus *bus)
1009 if (firmware_has_feature(FW_FEATURE_LPAR))
1010 return PCI_PROBE_DEVTREE;
1011 return PCI_PROBE_NORMAL;
1014 struct pci_controller_ops pseries_pci_controller_ops = {
1015 .probe_mode = pSeries_pci_probe_mode,
1018 define_machine(pseries) {
1020 .probe = pSeries_probe,
1021 .setup_arch = pSeries_setup_arch,
1022 .init_IRQ = pseries_init_irq,
1023 .show_cpuinfo = pSeries_show_cpuinfo,
1024 .log_error = pSeries_log_error,
1025 .pcibios_fixup = pSeries_final_fixup,
1026 .restart = rtas_restart,
1028 .panic = pseries_panic,
1029 .get_boot_time = rtas_get_boot_time,
1030 .get_rtc_time = rtas_get_rtc_time,
1031 .set_rtc_time = rtas_set_rtc_time,
1032 .calibrate_decr = generic_calibrate_decr,
1033 .progress = rtas_progress,
1034 .system_reset_exception = pSeries_system_reset_exception,
1035 .machine_check_early = pseries_machine_check_realmode,
1036 .machine_check_exception = pSeries_machine_check_exception,
1037 #ifdef CONFIG_KEXEC_CORE
1038 .machine_kexec = pSeries_machine_kexec,
1039 .kexec_cpu_down = pseries_kexec_cpu_down,
1041 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
1042 .memory_block_size = pseries_memory_block_size,