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>
46 #include <asm/pgtable.h>
49 #include <asm/pci-bridge.h>
50 #include <asm/iommu.h>
52 #include <asm/machdep.h>
55 #include <asm/nvram.h>
59 #include <asm/ppc-pci.h>
60 #include <asm/i8259.h>
63 #include <asm/firmware.h>
66 #include <asm/plpar_wrappers.h>
67 #include <asm/kexec.h>
68 #include <asm/isa-bridge.h>
69 #include <asm/security_features.h>
70 #include <asm/asm-const.h>
71 #include <asm/swiotlb.h>
75 #include "../../../../drivers/pci/pci.h"
79 unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K);
80 EXPORT_SYMBOL(CMO_PageSize);
82 int fwnmi_active; /* TRUE if an FWNMI handler is present */
84 static void pSeries_show_cpuinfo(struct seq_file *m)
86 struct device_node *root;
87 const char *model = "";
89 root = of_find_node_by_path("/");
91 model = of_get_property(root, "model", NULL);
92 seq_printf(m, "machine\t\t: CHRP %s\n", model);
95 seq_printf(m, "MMU\t\t: Radix\n");
97 seq_printf(m, "MMU\t\t: Hash\n");
100 /* Initialize firmware assisted non-maskable interrupts if
101 * the firmware supports this feature.
103 static void __init fwnmi_init(void)
105 unsigned long system_reset_addr, machine_check_addr;
108 int nr_cpus = num_possible_cpus();
109 #ifdef CONFIG_PPC_BOOK3S_64
110 struct slb_entry *slb_ptr;
114 int ibm_nmi_register = rtas_token("ibm,nmi-register");
115 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
118 /* If the kernel's not linked at zero we point the firmware at low
119 * addresses anyway, and use a trampoline to get to the real code. */
120 system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START;
121 machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START;
123 if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr,
128 * Allocate a chunk for per cpu buffer to hold rtas errorlog.
129 * It will be used in real mode mce handler, hence it needs to be
132 mce_data_buf = memblock_alloc_try_nid_raw(RTAS_ERROR_LOG_MAX * nr_cpus,
133 RTAS_ERROR_LOG_MAX, MEMBLOCK_LOW_LIMIT,
134 ppc64_rma_size, NUMA_NO_NODE);
136 panic("Failed to allocate %d bytes below %pa for MCE buffer\n",
137 RTAS_ERROR_LOG_MAX * nr_cpus, &ppc64_rma_size);
139 for_each_possible_cpu(i) {
140 paca_ptrs[i]->mce_data_buf = mce_data_buf +
141 (RTAS_ERROR_LOG_MAX * i);
144 #ifdef CONFIG_PPC_BOOK3S_64
145 if (!radix_enabled()) {
146 /* Allocate per cpu area to save old slb contents during MCE */
147 size = sizeof(struct slb_entry) * mmu_slb_size * nr_cpus;
148 slb_ptr = memblock_alloc_try_nid_raw(size,
149 sizeof(struct slb_entry), MEMBLOCK_LOW_LIMIT,
150 ppc64_rma_size, NUMA_NO_NODE);
152 panic("Failed to allocate %zu bytes below %pa for slb area\n",
153 size, &ppc64_rma_size);
155 for_each_possible_cpu(i)
156 paca_ptrs[i]->mce_faulty_slbs = slb_ptr + (mmu_slb_size * i);
161 static void pseries_8259_cascade(struct irq_desc *desc)
163 struct irq_chip *chip = irq_desc_get_chip(desc);
164 unsigned int cascade_irq = i8259_irq();
167 generic_handle_irq(cascade_irq);
169 chip->irq_eoi(&desc->irq_data);
172 static void __init pseries_setup_i8259_cascade(void)
174 struct device_node *np, *old, *found = NULL;
175 unsigned int cascade;
177 unsigned long intack = 0;
180 for_each_node_by_type(np, "interrupt-controller") {
181 if (of_device_is_compatible(np, "chrp,iic")) {
188 printk(KERN_DEBUG "pic: no ISA interrupt controller\n");
192 cascade = irq_of_parse_and_map(found, 0);
194 printk(KERN_ERR "pic: failed to map cascade interrupt");
197 pr_debug("pic: cascade mapped to irq %d\n", cascade);
199 for (old = of_node_get(found); old != NULL ; old = np) {
200 np = of_get_parent(old);
204 if (!of_node_name_eq(np, "pci"))
206 addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
209 naddr = of_n_addr_cells(np);
210 intack = addrp[naddr-1];
212 intack |= ((unsigned long)addrp[naddr-2]) << 32;
215 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack);
216 i8259_init(found, intack);
218 irq_set_chained_handler(cascade, pseries_8259_cascade);
221 static void __init pseries_init_irq(void)
223 /* Try using a XIVE if available, otherwise use a XICS */
224 if (!xive_spapr_init()) {
226 pseries_setup_i8259_cascade();
230 static void pseries_lpar_enable_pmcs(void)
232 unsigned long set, reset;
236 plpar_hcall_norets(H_PERFMON, set, reset);
239 static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *data)
241 struct of_reconfig_data *rd = data;
242 struct device_node *parent, *np = rd->dn;
247 case OF_RECONFIG_ATTACH_NODE:
248 parent = of_get_parent(np);
249 pdn = parent ? PCI_DN(parent) : NULL;
251 pci_add_device_node_info(pdn->phb, np);
255 case OF_RECONFIG_DETACH_NODE:
258 list_del(&pdn->list);
267 static struct notifier_block pci_dn_reconfig_nb = {
268 .notifier_call = pci_dn_reconfig_notifier,
271 struct kmem_cache *dtl_cache;
273 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
275 * Allocate space for the dispatch trace log for all possible cpus
276 * and register the buffers with the hypervisor. This is used for
277 * computing time stolen by the hypervisor.
279 static int alloc_dispatch_logs(void)
281 if (!firmware_has_feature(FW_FEATURE_SPLPAR))
287 alloc_dtl_buffers(0);
289 /* Register the DTL for the current (boot) cpu */
290 register_dtl_buffer(smp_processor_id());
294 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
295 static inline int alloc_dispatch_logs(void)
299 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
301 static int alloc_dispatch_log_kmem_cache(void)
303 void (*ctor)(void *) = get_dtl_cache_ctor();
305 dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES,
306 DISPATCH_LOG_BYTES, 0, ctor);
308 pr_warn("Failed to create dispatch trace log buffer cache\n");
309 pr_warn("Stolen time statistics will be unreliable\n");
313 return alloc_dispatch_logs();
315 machine_early_initcall(pseries, alloc_dispatch_log_kmem_cache);
317 static void pseries_lpar_idle(void)
320 * Default handler to go into low thread priority and possibly
321 * low power mode by ceding processor to hypervisor
324 if (!prep_irq_for_idle())
327 /* Indicate to hypervisor that we are idle. */
328 get_lppaca()->idle = 1;
331 * Yield the processor to the hypervisor. We return if
332 * an external interrupt occurs (which are driven prior
333 * to returning here) or if a prod occurs from another
334 * processor. When returning here, external interrupts
339 get_lppaca()->idle = 0;
343 * Enable relocation on during exceptions. This has partition wide scope and
344 * may take a while to complete, if it takes longer than one second we will
345 * just give up rather than wasting any more time on this - if that turns out
346 * to ever be a problem in practice we can move this into a kernel thread to
347 * finish off the process later in boot.
349 void pseries_enable_reloc_on_exc(void)
352 unsigned int delay, total_delay = 0;
355 rc = enable_reloc_on_exceptions();
356 if (!H_IS_LONG_BUSY(rc)) {
358 pr_info("Relocation on exceptions not"
360 } else if (rc != H_SUCCESS) {
361 pr_warn("Unable to enable relocation"
362 " on exceptions: %ld\n", rc);
367 delay = get_longbusy_msecs(rc);
368 total_delay += delay;
369 if (total_delay > 1000) {
370 pr_warn("Warning: Giving up waiting to enable "
371 "relocation on exceptions (%u msec)!\n",
379 EXPORT_SYMBOL(pseries_enable_reloc_on_exc);
381 void pseries_disable_reloc_on_exc(void)
386 rc = disable_reloc_on_exceptions();
387 if (!H_IS_LONG_BUSY(rc))
389 mdelay(get_longbusy_msecs(rc));
392 pr_warn("Warning: Failed to disable relocation on exceptions: %ld\n",
395 EXPORT_SYMBOL(pseries_disable_reloc_on_exc);
397 #ifdef CONFIG_KEXEC_CORE
398 static void pSeries_machine_kexec(struct kimage *image)
400 if (firmware_has_feature(FW_FEATURE_SET_MODE))
401 pseries_disable_reloc_on_exc();
403 default_machine_kexec(image);
407 #ifdef __LITTLE_ENDIAN__
408 void pseries_big_endian_exceptions(void)
413 rc = enable_big_endian_exceptions();
414 if (!H_IS_LONG_BUSY(rc))
416 mdelay(get_longbusy_msecs(rc));
420 * At this point it is unlikely panic() will get anything
421 * out to the user, since this is called very late in kexec
422 * but at least this will stop us from continuing on further
423 * and creating an even more difficult to debug situation.
425 * There is a known problem when kdump'ing, if cpus are offline
426 * the above call will fail. Rather than panicking again, keep
427 * going and hope the kdump kernel is also little endian, which
430 if (rc && !kdump_in_progress())
431 panic("Could not enable big endian exceptions");
434 void pseries_little_endian_exceptions(void)
439 rc = enable_little_endian_exceptions();
440 if (!H_IS_LONG_BUSY(rc))
442 mdelay(get_longbusy_msecs(rc));
445 ppc_md.progress("H_SET_MODE LE exception fail", 0);
446 panic("Could not enable little endian exceptions");
451 static void __init find_and_init_phbs(void)
453 struct device_node *node;
454 struct pci_controller *phb;
455 struct device_node *root = of_find_node_by_path("/");
457 for_each_child_of_node(root, node) {
458 if (!of_node_is_type(node, "pci") &&
459 !of_node_is_type(node, "pciex"))
462 phb = pcibios_alloc_controller(node);
466 pci_process_bridge_OF_ranges(phb, node, 0);
467 isa_bridge_find_early(phb);
468 phb->controller_ops = pseries_pci_controller_ops;
474 * PCI_PROBE_ONLY and PCI_REASSIGN_ALL_BUS can be set via properties
477 of_pci_check_probe_only();
480 static void init_cpu_char_feature_flags(struct h_cpu_char_result *result)
483 * The features below are disabled by default, so we instead look to see
484 * if firmware has *enabled* them, and set them if so.
486 if (result->character & H_CPU_CHAR_SPEC_BAR_ORI31)
487 security_ftr_set(SEC_FTR_SPEC_BAR_ORI31);
489 if (result->character & H_CPU_CHAR_BCCTRL_SERIALISED)
490 security_ftr_set(SEC_FTR_BCCTRL_SERIALISED);
492 if (result->character & H_CPU_CHAR_L1D_FLUSH_ORI30)
493 security_ftr_set(SEC_FTR_L1D_FLUSH_ORI30);
495 if (result->character & H_CPU_CHAR_L1D_FLUSH_TRIG2)
496 security_ftr_set(SEC_FTR_L1D_FLUSH_TRIG2);
498 if (result->character & H_CPU_CHAR_L1D_THREAD_PRIV)
499 security_ftr_set(SEC_FTR_L1D_THREAD_PRIV);
501 if (result->character & H_CPU_CHAR_COUNT_CACHE_DISABLED)
502 security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED);
504 if (result->character & H_CPU_CHAR_BCCTR_FLUSH_ASSIST)
505 security_ftr_set(SEC_FTR_BCCTR_FLUSH_ASSIST);
507 if (result->behaviour & H_CPU_BEHAV_FLUSH_COUNT_CACHE)
508 security_ftr_set(SEC_FTR_FLUSH_COUNT_CACHE);
511 * The features below are enabled by default, so we instead look to see
512 * if firmware has *disabled* them, and clear them if so.
514 if (!(result->behaviour & H_CPU_BEHAV_FAVOUR_SECURITY))
515 security_ftr_clear(SEC_FTR_FAVOUR_SECURITY);
517 if (!(result->behaviour & H_CPU_BEHAV_L1D_FLUSH_PR))
518 security_ftr_clear(SEC_FTR_L1D_FLUSH_PR);
520 if (!(result->behaviour & H_CPU_BEHAV_BNDS_CHK_SPEC_BAR))
521 security_ftr_clear(SEC_FTR_BNDS_CHK_SPEC_BAR);
524 void pseries_setup_rfi_flush(void)
526 struct h_cpu_char_result result;
527 enum l1d_flush_type types;
532 * Set features to the defaults assumed by init_cpu_char_feature_flags()
533 * so it can set/clear again any features that might have changed after
534 * migration, and in case the hypercall fails and it is not even called.
536 powerpc_security_features = SEC_FTR_DEFAULT;
538 rc = plpar_get_cpu_characteristics(&result);
540 init_cpu_char_feature_flags(&result);
543 * We're the guest so this doesn't apply to us, clear it to simplify
544 * handling of it elsewhere.
546 security_ftr_clear(SEC_FTR_L1D_FLUSH_HV);
548 types = L1D_FLUSH_FALLBACK;
550 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_TRIG2))
551 types |= L1D_FLUSH_MTTRIG;
553 if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_ORI30))
554 types |= L1D_FLUSH_ORI;
556 enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) && \
557 security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR);
559 setup_rfi_flush(types, enable);
560 setup_count_cache_flush();
563 #ifdef CONFIG_PCI_IOV
564 enum rtas_iov_fw_value_map {
565 NUM_RES_PROPERTY = 0, /* Number of Resources */
566 LOW_INT = 1, /* Lowest 32 bits of Address */
567 START_OF_ENTRIES = 2, /* Always start of entry */
568 APERTURE_PROPERTY = 2, /* Start of entry+ to Aperture Size */
569 WDW_SIZE_PROPERTY = 4, /* Start of entry+ to Window Size */
570 NEXT_ENTRY = 7 /* Go to next entry on array */
573 enum get_iov_fw_value_index {
574 BAR_ADDRS = 1, /* Get Bar Address */
575 APERTURE_SIZE = 2, /* Get Aperture Size */
576 WDW_SIZE = 3 /* Get Window Size */
579 resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno,
580 enum get_iov_fw_value_index value)
583 struct device_node *dn = pci_device_to_OF_node(dev);
584 int i, num_res, ret = 0;
586 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
591 * First element in the array is the number of Bars
592 * returned. Search through the list to find the matching
595 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
596 if (resno >= num_res)
597 return 0; /* or an errror */
599 i = START_OF_ENTRIES + NEXT_ENTRY * resno;
602 ret = of_read_number(&indexes[i], 2);
605 ret = of_read_number(&indexes[i + APERTURE_PROPERTY], 2);
608 ret = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2);
615 void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes)
617 struct resource *res;
618 resource_size_t base, size;
621 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
622 num_res = min_t(int, num_res, PCI_SRIOV_NUM_BARS);
623 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS;
624 i += NEXT_ENTRY, r++) {
625 res = &dev->resource[r + PCI_IOV_RESOURCES];
626 base = of_read_number(&indexes[i], 2);
627 size = of_read_number(&indexes[i + APERTURE_PROPERTY], 2);
628 res->flags = pci_parse_of_flags(of_read_number
629 (&indexes[i + LOW_INT], 1), 0);
630 res->flags |= (IORESOURCE_MEM_64 | IORESOURCE_PCI_FIXED);
631 res->name = pci_name(dev);
633 res->end = base + size - 1;
637 void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes)
639 struct resource *res, *root, *conflict;
640 resource_size_t base, size;
644 * First element in the array is the number of Bars
645 * returned. Search through the list to find the matching
646 * bars assign them from firmware into resources structure.
648 num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1);
649 for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS;
650 i += NEXT_ENTRY, r++) {
651 res = &dev->resource[r + PCI_IOV_RESOURCES];
652 base = of_read_number(&indexes[i], 2);
653 size = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2);
654 res->name = pci_name(dev);
656 res->end = base + size - 1;
657 root = &iomem_resource;
659 "pSeries IOV BAR %d: trying firmware assignment %pR\n",
660 r + PCI_IOV_RESOURCES, res);
661 conflict = request_resource_conflict(root, res);
664 "BAR %d: %pR conflicts with %s %pR\n",
665 r + PCI_IOV_RESOURCES, res,
666 conflict->name, conflict);
667 res->flags |= IORESOURCE_UNSET;
672 static void pseries_disable_sriov_resources(struct pci_dev *pdev)
676 pci_warn(pdev, "No hypervisor support for SR-IOV on this device, IOV BARs disabled.\n");
677 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++)
678 pdev->resource[i + PCI_IOV_RESOURCES].flags = 0;
681 static void pseries_pci_fixup_resources(struct pci_dev *pdev)
684 struct device_node *dn = pci_device_to_OF_node(pdev);
686 /*Firmware must support open sriov otherwise dont configure*/
687 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
689 of_pci_set_vf_bar_size(pdev, indexes);
691 pseries_disable_sriov_resources(pdev);
694 static void pseries_pci_fixup_iov_resources(struct pci_dev *pdev)
697 struct device_node *dn = pci_device_to_OF_node(pdev);
699 if (!pdev->is_physfn || pci_dev_is_added(pdev))
701 /*Firmware must support open sriov otherwise dont configure*/
702 indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL);
704 of_pci_parse_iov_addrs(pdev, indexes);
706 pseries_disable_sriov_resources(pdev);
709 static resource_size_t pseries_pci_iov_resource_alignment(struct pci_dev *pdev,
713 struct device_node *dn = pci_device_to_OF_node(pdev);
715 /*Firmware must support open sriov otherwise report regular alignment*/
716 reg = of_get_property(dn, "ibm,is-open-sriov-pf", NULL);
718 return pci_iov_resource_size(pdev, resno);
720 if (!pdev->is_physfn)
722 return pseries_get_iov_fw_value(pdev,
723 resno - PCI_IOV_RESOURCES,
728 static void __init pSeries_setup_arch(void)
730 set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT);
732 /* Discover PIC type and setup ppc_md accordingly */
736 /* openpic global configuration register (64-bit format). */
737 /* openpic Interrupt Source Unit pointer (64-bit format). */
738 /* python0 facility area (mmio) (64-bit format) REAL address. */
740 /* init to some ~sane value until calibrate_delay() runs */
741 loops_per_jiffy = 50000000;
745 pseries_setup_rfi_flush();
747 pseries_lpar_read_hblkrm_characteristics();
749 /* By default, only probe PCI (can be overridden by rtas_pci) */
750 pci_add_flags(PCI_PROBE_ONLY);
752 /* Find and initialize PCI host bridges */
753 init_pci_config_tokens();
754 find_and_init_phbs();
755 of_reconfig_notifier_register(&pci_dn_reconfig_nb);
757 pSeries_nvram_init();
759 if (firmware_has_feature(FW_FEATURE_LPAR)) {
760 vpa_init(boot_cpuid);
761 ppc_md.power_save = pseries_lpar_idle;
762 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
763 #ifdef CONFIG_PCI_IOV
764 ppc_md.pcibios_fixup_resources =
765 pseries_pci_fixup_resources;
766 ppc_md.pcibios_fixup_sriov =
767 pseries_pci_fixup_iov_resources;
768 ppc_md.pcibios_iov_resource_alignment =
769 pseries_pci_iov_resource_alignment;
772 /* No special idle routine */
773 ppc_md.enable_pmcs = power4_enable_pmcs;
776 ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare;
778 if (swiotlb_force == SWIOTLB_FORCE)
779 ppc_swiotlb_enable = 1;
782 static void pseries_panic(char *str)
784 panic_flush_kmsg_end();
788 static int __init pSeries_init_panel(void)
790 /* Manually leave the kernel version on the panel. */
791 #ifdef __BIG_ENDIAN__
792 ppc_md.progress("Linux ppc64\n", 0);
794 ppc_md.progress("Linux ppc64le\n", 0);
796 ppc_md.progress(init_utsname()->version, 0);
800 machine_arch_initcall(pseries, pSeries_init_panel);
802 static int pseries_set_dabr(unsigned long dabr, unsigned long dabrx)
804 return plpar_hcall_norets(H_SET_DABR, dabr);
807 static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx)
809 /* Have to set at least one bit in the DABRX according to PAPR */
810 if (dabrx == 0 && dabr == 0)
812 /* PAPR says we can only set kernel and user bits */
813 dabrx &= DABRX_KERNEL | DABRX_USER;
815 return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx);
818 static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx)
820 /* PAPR says we can't set HYP */
823 return plpar_set_watchpoint0(dawr, dawrx);
826 #define CMO_CHARACTERISTICS_TOKEN 44
827 #define CMO_MAXLENGTH 1026
829 void pSeries_coalesce_init(void)
831 struct hvcall_mpp_x_data mpp_x_data;
833 if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data))
834 powerpc_firmware_features |= FW_FEATURE_XCMO;
836 powerpc_firmware_features &= ~FW_FEATURE_XCMO;
840 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
841 * handle that here. (Stolen from parse_system_parameter_string)
843 static void pSeries_cmo_feature_init(void)
845 char *ptr, *key, *value, *end;
847 int page_order = IOMMU_PAGE_SHIFT_4K;
849 pr_debug(" -> fw_cmo_feature_init()\n");
850 spin_lock(&rtas_data_buf_lock);
851 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
852 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
854 CMO_CHARACTERISTICS_TOKEN,
858 if (call_status != 0) {
859 spin_unlock(&rtas_data_buf_lock);
860 pr_debug("CMO not available\n");
861 pr_debug(" <- fw_cmo_feature_init()\n");
865 end = rtas_data_buf + CMO_MAXLENGTH - 2;
866 ptr = rtas_data_buf + 2; /* step over strlen value */
869 while (*ptr && (ptr <= end)) {
870 /* Separate the key and value by replacing '=' with '\0' and
871 * point the value at the string after the '='
876 } else if (ptr[0] == '\0' || ptr[0] == ',') {
877 /* Terminate the string containing the key/value pair */
881 pr_debug("Malformed key/value pair\n");
882 /* Never found a '=', end processing */
886 if (0 == strcmp(key, "CMOPageSize"))
887 page_order = simple_strtol(value, NULL, 10);
888 else if (0 == strcmp(key, "PrPSP"))
889 CMO_PrPSP = simple_strtol(value, NULL, 10);
890 else if (0 == strcmp(key, "SecPSP"))
891 CMO_SecPSP = simple_strtol(value, NULL, 10);
892 value = key = ptr + 1;
897 /* Page size is returned as the power of 2 of the page size,
898 * convert to the page size in bytes before returning
900 CMO_PageSize = 1 << page_order;
901 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize);
903 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) {
904 pr_info("CMO enabled\n");
905 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
907 powerpc_firmware_features |= FW_FEATURE_CMO;
908 pSeries_coalesce_init();
910 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
912 spin_unlock(&rtas_data_buf_lock);
913 pr_debug(" <- fw_cmo_feature_init()\n");
917 * Early initialization. Relocation is on but do not reference unbolted pages
919 static void __init pseries_init(void)
921 pr_debug(" -> pseries_init()\n");
923 #ifdef CONFIG_HVC_CONSOLE
924 if (firmware_has_feature(FW_FEATURE_LPAR))
925 hvc_vio_init_early();
927 if (firmware_has_feature(FW_FEATURE_XDABR))
928 ppc_md.set_dabr = pseries_set_xdabr;
929 else if (firmware_has_feature(FW_FEATURE_DABR))
930 ppc_md.set_dabr = pseries_set_dabr;
932 if (firmware_has_feature(FW_FEATURE_SET_MODE))
933 ppc_md.set_dawr = pseries_set_dawr;
935 pSeries_cmo_feature_init();
936 iommu_init_early_pSeries();
938 pr_debug(" <- pseries_init()\n");
942 * pseries_power_off - tell firmware about how to power off the system.
944 * This function calls either the power-off rtas token in normal cases
945 * or the ibm,power-off-ups token (if present & requested) in case of
946 * a power failure. If power-off token is used, power on will only be
947 * possible with power button press. If ibm,power-off-ups token is used
948 * it will allow auto poweron after power is restored.
950 static void pseries_power_off(void)
953 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
955 if (rtas_flash_term_hook)
956 rtas_flash_term_hook(SYS_POWER_OFF);
958 if (rtas_poweron_auto == 0 ||
959 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
960 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
961 printk(KERN_INFO "RTAS power-off returned %d\n", rc);
963 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
964 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
969 static int __init pSeries_probe(void)
971 if (!of_node_is_type(of_root, "chrp"))
974 /* Cell blades firmware claims to be chrp while it's not. Until this
975 * is fixed, we need to avoid those here.
977 if (of_machine_is_compatible("IBM,CPBW-1.0") ||
978 of_machine_is_compatible("IBM,CBEA"))
981 pm_power_off = pseries_power_off;
983 pr_debug("Machine is%s LPAR !\n",
984 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
991 static int pSeries_pci_probe_mode(struct pci_bus *bus)
993 if (firmware_has_feature(FW_FEATURE_LPAR))
994 return PCI_PROBE_DEVTREE;
995 return PCI_PROBE_NORMAL;
998 struct pci_controller_ops pseries_pci_controller_ops = {
999 .probe_mode = pSeries_pci_probe_mode,
1002 define_machine(pseries) {
1004 .probe = pSeries_probe,
1005 .setup_arch = pSeries_setup_arch,
1006 .init_IRQ = pseries_init_irq,
1007 .show_cpuinfo = pSeries_show_cpuinfo,
1008 .log_error = pSeries_log_error,
1009 .pcibios_fixup = pSeries_final_fixup,
1010 .restart = rtas_restart,
1012 .panic = pseries_panic,
1013 .get_boot_time = rtas_get_boot_time,
1014 .get_rtc_time = rtas_get_rtc_time,
1015 .set_rtc_time = rtas_set_rtc_time,
1016 .calibrate_decr = generic_calibrate_decr,
1017 .progress = rtas_progress,
1018 .system_reset_exception = pSeries_system_reset_exception,
1019 .machine_check_early = pseries_machine_check_realmode,
1020 .machine_check_exception = pSeries_machine_check_exception,
1021 #ifdef CONFIG_KEXEC_CORE
1022 .machine_kexec = pSeries_machine_kexec,
1023 .kexec_cpu_down = pseries_kexec_cpu_down,
1025 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
1026 .memory_block_size = pseries_memory_block_size,