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19#include <linux/cpu.h>
20#include <linux/errno.h>
21#include <linux/sched.h>
22#include <linux/kernel.h>
23#include <linux/mm.h>
24#include <linux/stddef.h>
25#include <linux/unistd.h>
26#include <linux/user.h>
27#include <linux/tty.h>
28#include <linux/major.h>
29#include <linux/interrupt.h>
30#include <linux/reboot.h>
31#include <linux/init.h>
32#include <linux/ioport.h>
33#include <linux/console.h>
34#include <linux/pci.h>
35#include <linux/utsname.h>
36#include <linux/adb.h>
37#include <linux/export.h>
38#include <linux/delay.h>
39#include <linux/irq.h>
40#include <linux/seq_file.h>
41#include <linux/root_dev.h>
42#include <linux/cpuidle.h>
43#include <linux/of.h>
44#include <linux/kexec.h>
45
46#include <asm/mmu.h>
47#include <asm/processor.h>
48#include <asm/io.h>
49#include <asm/pgtable.h>
50#include <asm/prom.h>
51#include <asm/rtas.h>
52#include <asm/pci-bridge.h>
53#include <asm/iommu.h>
54#include <asm/dma.h>
55#include <asm/machdep.h>
56#include <asm/irq.h>
57#include <asm/time.h>
58#include <asm/nvram.h>
59#include <asm/pmc.h>
60#include <asm/mpic.h>
61#include <asm/xics.h>
62#include <asm/ppc-pci.h>
63#include <asm/i8259.h>
64#include <asm/udbg.h>
65#include <asm/smp.h>
66#include <asm/firmware.h>
67#include <asm/eeh.h>
68#include <asm/reg.h>
69#include <asm/plpar_wrappers.h>
70
71#include "pseries.h"
72
73int CMO_PrPSP = -1;
74int CMO_SecPSP = -1;
75unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT);
76EXPORT_SYMBOL(CMO_PageSize);
77
78int fwnmi_active;
79
80static struct device_node *pSeries_mpic_node;
81
82static void pSeries_show_cpuinfo(struct seq_file *m)
83{
84 struct device_node *root;
85 const char *model = "";
86
87 root = of_find_node_by_path("/");
88 if (root)
89 model = of_get_property(root, "model", NULL);
90 seq_printf(m, "machine\t\t: CHRP %s\n", model);
91 of_node_put(root);
92}
93
94
95
96
97static void __init fwnmi_init(void)
98{
99 unsigned long system_reset_addr, machine_check_addr;
100
101 int ibm_nmi_register = rtas_token("ibm,nmi-register");
102 if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
103 return;
104
105
106
107 system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START;
108 machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START;
109
110 if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr,
111 machine_check_addr))
112 fwnmi_active = 1;
113}
114
115static void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc)
116{
117 struct irq_chip *chip = irq_desc_get_chip(desc);
118 unsigned int cascade_irq = i8259_irq();
119
120 if (cascade_irq != NO_IRQ)
121 generic_handle_irq(cascade_irq);
122
123 chip->irq_eoi(&desc->irq_data);
124}
125
126static void __init pseries_setup_i8259_cascade(void)
127{
128 struct device_node *np, *old, *found = NULL;
129 unsigned int cascade;
130 const u32 *addrp;
131 unsigned long intack = 0;
132 int naddr;
133
134 for_each_node_by_type(np, "interrupt-controller") {
135 if (of_device_is_compatible(np, "chrp,iic")) {
136 found = np;
137 break;
138 }
139 }
140
141 if (found == NULL) {
142 printk(KERN_DEBUG "pic: no ISA interrupt controller\n");
143 return;
144 }
145
146 cascade = irq_of_parse_and_map(found, 0);
147 if (cascade == NO_IRQ) {
148 printk(KERN_ERR "pic: failed to map cascade interrupt");
149 return;
150 }
151 pr_debug("pic: cascade mapped to irq %d\n", cascade);
152
153 for (old = of_node_get(found); old != NULL ; old = np) {
154 np = of_get_parent(old);
155 of_node_put(old);
156 if (np == NULL)
157 break;
158 if (strcmp(np->name, "pci") != 0)
159 continue;
160 addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
161 if (addrp == NULL)
162 continue;
163 naddr = of_n_addr_cells(np);
164 intack = addrp[naddr-1];
165 if (naddr > 1)
166 intack |= ((unsigned long)addrp[naddr-2]) << 32;
167 }
168 if (intack)
169 printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack);
170 i8259_init(found, intack);
171 of_node_put(found);
172 irq_set_chained_handler(cascade, pseries_8259_cascade);
173}
174
175static void __init pseries_mpic_init_IRQ(void)
176{
177 struct device_node *np;
178 const unsigned int *opprop;
179 unsigned long openpic_addr = 0;
180 int naddr, n, i, opplen;
181 struct mpic *mpic;
182
183 np = of_find_node_by_path("/");
184 naddr = of_n_addr_cells(np);
185 opprop = of_get_property(np, "platform-open-pic", &opplen);
186 if (opprop != NULL) {
187 openpic_addr = of_read_number(opprop, naddr);
188 printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
189 }
190 of_node_put(np);
191
192 BUG_ON(openpic_addr == 0);
193
194
195 mpic = mpic_alloc(pSeries_mpic_node, openpic_addr,
196 MPIC_NO_RESET, 16, 0, " MPIC ");
197 BUG_ON(mpic == NULL);
198
199
200 opplen /= sizeof(u32);
201 for (n = 0, i = naddr; i < opplen; i += naddr, n++) {
202 unsigned long isuaddr = of_read_number(opprop + i, naddr);
203 mpic_assign_isu(mpic, n, isuaddr);
204 }
205
206
207 ppc_md.get_irq = mpic_get_irq;
208
209
210 mpic_init(mpic);
211
212
213 pseries_setup_i8259_cascade();
214}
215
216static void __init pseries_xics_init_IRQ(void)
217{
218 xics_init();
219 pseries_setup_i8259_cascade();
220}
221
222static void pseries_lpar_enable_pmcs(void)
223{
224 unsigned long set, reset;
225
226 set = 1UL << 63;
227 reset = 0;
228 plpar_hcall_norets(H_PERFMON, set, reset);
229}
230
231static void __init pseries_discover_pic(void)
232{
233 struct device_node *np;
234 const char *typep;
235
236 for (np = NULL; (np = of_find_node_by_name(np,
237 "interrupt-controller"));) {
238 typep = of_get_property(np, "compatible", NULL);
239 if (strstr(typep, "open-pic")) {
240 pSeries_mpic_node = of_node_get(np);
241 ppc_md.init_IRQ = pseries_mpic_init_IRQ;
242 setup_kexec_cpu_down_mpic();
243 smp_init_pseries_mpic();
244 return;
245 } else if (strstr(typep, "ppc-xicp")) {
246 ppc_md.init_IRQ = pseries_xics_init_IRQ;
247 setup_kexec_cpu_down_xics();
248 smp_init_pseries_xics();
249 return;
250 }
251 }
252 printk(KERN_ERR "pSeries_discover_pic: failed to recognize"
253 " interrupt-controller\n");
254}
255
256static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
257{
258 struct device_node *np = node;
259 struct pci_dn *pci = NULL;
260 int err = NOTIFY_OK;
261
262 switch (action) {
263 case OF_RECONFIG_ATTACH_NODE:
264 pci = np->parent->data;
265 if (pci) {
266 update_dn_pci_info(np, pci->phb);
267
268
269 eeh_dev_init(np, pci->phb);
270 }
271 break;
272 default:
273 err = NOTIFY_DONE;
274 break;
275 }
276 return err;
277}
278
279static struct notifier_block pci_dn_reconfig_nb = {
280 .notifier_call = pci_dn_reconfig_notifier,
281};
282
283struct kmem_cache *dtl_cache;
284
285#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
286
287
288
289
290
291static int alloc_dispatch_logs(void)
292{
293 int cpu, ret;
294 struct paca_struct *pp;
295 struct dtl_entry *dtl;
296
297 if (!firmware_has_feature(FW_FEATURE_SPLPAR))
298 return 0;
299
300 if (!dtl_cache)
301 return 0;
302
303 for_each_possible_cpu(cpu) {
304 pp = &paca[cpu];
305 dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL);
306 if (!dtl) {
307 pr_warn("Failed to allocate dispatch trace log for cpu %d\n",
308 cpu);
309 pr_warn("Stolen time statistics will be unreliable\n");
310 break;
311 }
312
313 pp->dtl_ridx = 0;
314 pp->dispatch_log = dtl;
315 pp->dispatch_log_end = dtl + N_DISPATCH_LOG;
316 pp->dtl_curr = dtl;
317 }
318
319
320 dtl = get_paca()->dispatch_log;
321 get_paca()->dtl_ridx = 0;
322 get_paca()->dtl_curr = dtl;
323 get_paca()->lppaca_ptr->dtl_idx = 0;
324
325
326 dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES);
327 ret = register_dtl(hard_smp_processor_id(), __pa(dtl));
328 if (ret)
329 pr_err("WARNING: DTL registration of cpu %d (hw %d) failed "
330 "with %d\n", smp_processor_id(),
331 hard_smp_processor_id(), ret);
332 get_paca()->lppaca_ptr->dtl_enable_mask = 2;
333
334 return 0;
335}
336#else
337static inline int alloc_dispatch_logs(void)
338{
339 return 0;
340}
341#endif
342
343static int alloc_dispatch_log_kmem_cache(void)
344{
345 dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES,
346 DISPATCH_LOG_BYTES, 0, NULL);
347 if (!dtl_cache) {
348 pr_warn("Failed to create dispatch trace log buffer cache\n");
349 pr_warn("Stolen time statistics will be unreliable\n");
350 return 0;
351 }
352
353 return alloc_dispatch_logs();
354}
355early_initcall(alloc_dispatch_log_kmem_cache);
356
357static void pseries_lpar_idle(void)
358{
359
360
361
362 if (cpuidle_idle_call()) {
363
364
365
366
367
368
369 get_lppaca()->idle = 1;
370
371
372
373
374
375
376
377
378 cede_processor();
379
380 get_lppaca()->idle = 0;
381 }
382}
383
384
385
386
387
388
389
390
391long pSeries_enable_reloc_on_exc(void)
392{
393 long rc;
394 unsigned int delay, total_delay = 0;
395
396 while (1) {
397 rc = enable_reloc_on_exceptions();
398 if (!H_IS_LONG_BUSY(rc))
399 return rc;
400
401 delay = get_longbusy_msecs(rc);
402 total_delay += delay;
403 if (total_delay > 1000) {
404 pr_warn("Warning: Giving up waiting to enable "
405 "relocation on exceptions (%u msec)!\n",
406 total_delay);
407 return rc;
408 }
409
410 mdelay(delay);
411 }
412}
413EXPORT_SYMBOL(pSeries_enable_reloc_on_exc);
414
415long pSeries_disable_reloc_on_exc(void)
416{
417 long rc;
418
419 while (1) {
420 rc = disable_reloc_on_exceptions();
421 if (!H_IS_LONG_BUSY(rc))
422 return rc;
423 mdelay(get_longbusy_msecs(rc));
424 }
425}
426EXPORT_SYMBOL(pSeries_disable_reloc_on_exc);
427
428#ifdef CONFIG_KEXEC
429static void pSeries_machine_kexec(struct kimage *image)
430{
431 long rc;
432
433 if (firmware_has_feature(FW_FEATURE_SET_MODE) &&
434 (image->type != KEXEC_TYPE_CRASH)) {
435 rc = pSeries_disable_reloc_on_exc();
436 if (rc != H_SUCCESS)
437 pr_warning("Warning: Failed to disable relocation on "
438 "exceptions: %ld\n", rc);
439 }
440
441 default_machine_kexec(image);
442}
443#endif
444
445static void __init pSeries_setup_arch(void)
446{
447 panic_timeout = 10;
448
449
450 pseries_discover_pic();
451
452
453
454
455
456
457 loops_per_jiffy = 50000000;
458
459 fwnmi_init();
460
461
462 pci_add_flags(PCI_PROBE_ONLY);
463
464
465 init_pci_config_tokens();
466 find_and_init_phbs();
467 of_reconfig_notifier_register(&pci_dn_reconfig_nb);
468
469 pSeries_nvram_init();
470
471 if (firmware_has_feature(FW_FEATURE_LPAR)) {
472 vpa_init(boot_cpuid);
473 ppc_md.power_save = pseries_lpar_idle;
474 ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
475 } else {
476
477 ppc_md.enable_pmcs = power4_enable_pmcs;
478 }
479
480 ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare;
481
482 if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
483 long rc;
484 if ((rc = pSeries_enable_reloc_on_exc()) != H_SUCCESS) {
485 pr_warn("Unable to enable relocation on exceptions: "
486 "%ld\n", rc);
487 }
488 }
489}
490
491static int __init pSeries_init_panel(void)
492{
493
494 ppc_md.progress("Linux ppc64\n", 0);
495 ppc_md.progress(init_utsname()->version, 0);
496
497 return 0;
498}
499machine_arch_initcall(pseries, pSeries_init_panel);
500
501static int pseries_set_dabr(unsigned long dabr, unsigned long dabrx)
502{
503 return plpar_hcall_norets(H_SET_DABR, dabr);
504}
505
506static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx)
507{
508
509 if (dabrx == 0 && dabr == 0)
510 dabrx = DABRX_USER;
511
512 dabrx &= DABRX_KERNEL | DABRX_USER;
513
514 return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx);
515}
516
517static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx)
518{
519
520 dawrx &= ~DAWRX_HYP;
521
522 return plapr_set_watchpoint0(dawr, dawrx);
523}
524
525#define CMO_CHARACTERISTICS_TOKEN 44
526#define CMO_MAXLENGTH 1026
527
528void pSeries_coalesce_init(void)
529{
530 struct hvcall_mpp_x_data mpp_x_data;
531
532 if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data))
533 powerpc_firmware_features |= FW_FEATURE_XCMO;
534 else
535 powerpc_firmware_features &= ~FW_FEATURE_XCMO;
536}
537
538
539
540
541
542void pSeries_cmo_feature_init(void)
543{
544 char *ptr, *key, *value, *end;
545 int call_status;
546 int page_order = IOMMU_PAGE_SHIFT;
547
548 pr_debug(" -> fw_cmo_feature_init()\n");
549 spin_lock(&rtas_data_buf_lock);
550 memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
551 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
552 NULL,
553 CMO_CHARACTERISTICS_TOKEN,
554 __pa(rtas_data_buf),
555 RTAS_DATA_BUF_SIZE);
556
557 if (call_status != 0) {
558 spin_unlock(&rtas_data_buf_lock);
559 pr_debug("CMO not available\n");
560 pr_debug(" <- fw_cmo_feature_init()\n");
561 return;
562 }
563
564 end = rtas_data_buf + CMO_MAXLENGTH - 2;
565 ptr = rtas_data_buf + 2;
566 key = value = ptr;
567
568 while (*ptr && (ptr <= end)) {
569
570
571
572 if (ptr[0] == '=') {
573 ptr[0] = '\0';
574 value = ptr + 1;
575 } else if (ptr[0] == '\0' || ptr[0] == ',') {
576
577 ptr[0] = '\0';
578
579 if (key == value) {
580 pr_debug("Malformed key/value pair\n");
581
582 break;
583 }
584
585 if (0 == strcmp(key, "CMOPageSize"))
586 page_order = simple_strtol(value, NULL, 10);
587 else if (0 == strcmp(key, "PrPSP"))
588 CMO_PrPSP = simple_strtol(value, NULL, 10);
589 else if (0 == strcmp(key, "SecPSP"))
590 CMO_SecPSP = simple_strtol(value, NULL, 10);
591 value = key = ptr + 1;
592 }
593 ptr++;
594 }
595
596
597
598
599 CMO_PageSize = 1 << page_order;
600 pr_debug("CMO_PageSize = %lu\n", CMO_PageSize);
601
602 if (CMO_PrPSP != -1 || CMO_SecPSP != -1) {
603 pr_info("CMO enabled\n");
604 pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
605 CMO_SecPSP);
606 powerpc_firmware_features |= FW_FEATURE_CMO;
607 pSeries_coalesce_init();
608 } else
609 pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
610 CMO_SecPSP);
611 spin_unlock(&rtas_data_buf_lock);
612 pr_debug(" <- fw_cmo_feature_init()\n");
613}
614
615
616
617
618static void __init pSeries_init_early(void)
619{
620 pr_debug(" -> pSeries_init_early()\n");
621
622#ifdef CONFIG_HVC_CONSOLE
623 if (firmware_has_feature(FW_FEATURE_LPAR))
624 hvc_vio_init_early();
625#endif
626 if (firmware_has_feature(FW_FEATURE_XDABR))
627 ppc_md.set_dabr = pseries_set_xdabr;
628 else if (firmware_has_feature(FW_FEATURE_DABR))
629 ppc_md.set_dabr = pseries_set_dabr;
630
631 if (firmware_has_feature(FW_FEATURE_SET_MODE))
632 ppc_md.set_dawr = pseries_set_dawr;
633
634 pSeries_cmo_feature_init();
635 iommu_init_early_pSeries();
636
637 pr_debug(" <- pSeries_init_early()\n");
638}
639
640
641
642
643
644static int __init pseries_probe_fw_features(unsigned long node,
645 const char *uname, int depth,
646 void *data)
647{
648 const char *prop;
649 unsigned long len;
650 static int hypertas_found;
651 static int vec5_found;
652
653 if (depth != 1)
654 return 0;
655
656 if (!strcmp(uname, "rtas") || !strcmp(uname, "rtas@0")) {
657 prop = of_get_flat_dt_prop(node, "ibm,hypertas-functions",
658 &len);
659 if (prop) {
660 powerpc_firmware_features |= FW_FEATURE_LPAR;
661 fw_hypertas_feature_init(prop, len);
662 }
663
664 hypertas_found = 1;
665 }
666
667 if (!strcmp(uname, "chosen")) {
668 prop = of_get_flat_dt_prop(node, "ibm,architecture-vec-5",
669 &len);
670 if (prop)
671 fw_vec5_feature_init(prop, len);
672
673 vec5_found = 1;
674 }
675
676 return hypertas_found && vec5_found;
677}
678
679static int __init pSeries_probe(void)
680{
681 unsigned long root = of_get_flat_dt_root();
682 char *dtype = of_get_flat_dt_prop(root, "device_type", NULL);
683
684 if (dtype == NULL)
685 return 0;
686 if (strcmp(dtype, "chrp"))
687 return 0;
688
689
690
691
692 if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") ||
693 of_flat_dt_is_compatible(root, "IBM,CBEA"))
694 return 0;
695
696 pr_debug("pSeries detected, looking for LPAR capability...\n");
697
698
699 of_scan_flat_dt(pseries_probe_fw_features, NULL);
700
701 if (firmware_has_feature(FW_FEATURE_LPAR))
702 hpte_init_lpar();
703 else
704 hpte_init_native();
705
706 pr_debug("Machine is%s LPAR !\n",
707 (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
708
709 return 1;
710}
711
712static int pSeries_pci_probe_mode(struct pci_bus *bus)
713{
714 if (firmware_has_feature(FW_FEATURE_LPAR))
715 return PCI_PROBE_DEVTREE;
716 return PCI_PROBE_NORMAL;
717}
718
719
720
721
722
723
724
725
726
727
728static void pSeries_power_off(void)
729{
730 int rc;
731 int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
732
733 if (rtas_flash_term_hook)
734 rtas_flash_term_hook(SYS_POWER_OFF);
735
736 if (rtas_poweron_auto == 0 ||
737 rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
738 rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
739 printk(KERN_INFO "RTAS power-off returned %d\n", rc);
740 } else {
741 rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
742 printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
743 }
744 for (;;);
745}
746
747#ifndef CONFIG_PCI
748void pSeries_final_fixup(void) { }
749#endif
750
751define_machine(pseries) {
752 .name = "pSeries",
753 .probe = pSeries_probe,
754 .setup_arch = pSeries_setup_arch,
755 .init_early = pSeries_init_early,
756 .show_cpuinfo = pSeries_show_cpuinfo,
757 .log_error = pSeries_log_error,
758 .pcibios_fixup = pSeries_final_fixup,
759 .pci_probe_mode = pSeries_pci_probe_mode,
760 .restart = rtas_restart,
761 .power_off = pSeries_power_off,
762 .halt = rtas_halt,
763 .panic = rtas_os_term,
764 .get_boot_time = rtas_get_boot_time,
765 .get_rtc_time = rtas_get_rtc_time,
766 .set_rtc_time = rtas_set_rtc_time,
767 .calibrate_decr = generic_calibrate_decr,
768 .progress = rtas_progress,
769 .system_reset_exception = pSeries_system_reset_exception,
770 .machine_check_exception = pSeries_machine_check_exception,
771#ifdef CONFIG_KEXEC
772 .machine_kexec = pSeries_machine_kexec,
773#endif
774};
775