aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/pseries/setup.c
blob: 1689adccc6d73402cccc5c27e7ee0d1c4446456c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
/*
 *  64-bit pSeries and RS/6000 setup code.
 *
 *  Copyright (C) 1995  Linus Torvalds
 *  Adapted from 'alpha' version by Gary Thomas
 *  Modified by Cort Dougan (cort@cs.nmt.edu)
 *  Modified by PPC64 Team, IBM Corp
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

/*
 * bootup setup stuff..
 */

#include <linux/cpu.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/user.h>
#include <linux/tty.h>
#include <linux/major.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/console.h>
#include <linux/pci.h>
#include <linux/utsname.h>
#include <linux/adb.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>

#include <asm/mmu.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/pci-bridge.h>
#include <asm/iommu.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/irq.h>
#include <asm/time.h>
#include <asm/nvram.h>
#include <asm/pmc.h>
#include <asm/mpic.h>
#include <asm/xics.h>
#include <asm/ppc-pci.h>
#include <asm/i8259.h>
#include <asm/udbg.h>
#include <asm/smp.h>
#include <asm/firmware.h>
#include <asm/eeh.h>
#include <asm/pSeries_reconfig.h>

#include "plpar_wrappers.h"
#include "pseries.h"

int CMO_PrPSP = -1;
int CMO_SecPSP = -1;
unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT);
EXPORT_SYMBOL(CMO_PageSize);

int fwnmi_active;  /* TRUE if an FWNMI handler is present */

static void pseries_shared_idle_sleep(void);
static void pseries_dedicated_idle_sleep(void);

static struct device_node *pSeries_mpic_node;

static void pSeries_show_cpuinfo(struct seq_file *m)
{
	struct device_node *root;
	const char *model = "";

	root = of_find_node_by_path("/");
	if (root)
		model = of_get_property(root, "model", NULL);
	seq_printf(m, "machine\t\t: CHRP %s\n", model);
	of_node_put(root);
}

/* Initialize firmware assisted non-maskable interrupts if
 * the firmware supports this feature.
 */
static void __init fwnmi_init(void)
{
	unsigned long system_reset_addr, machine_check_addr;

	int ibm_nmi_register = rtas_token("ibm,nmi-register");
	if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
		return;

	/* If the kernel's not linked at zero we point the firmware at low
	 * addresses anyway, and use a trampoline to get to the real code. */
	system_reset_addr  = __pa(system_reset_fwnmi) - PHYSICAL_START;
	machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START;

	if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr,
				machine_check_addr))
		fwnmi_active = 1;
}

static void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc)
{
	struct irq_chip *chip = irq_desc_get_chip(desc);
	unsigned int cascade_irq = i8259_irq();

	if (cascade_irq != NO_IRQ)
		generic_handle_irq(cascade_irq);

	chip->irq_eoi(&desc->irq_data);
}

static void __init pseries_setup_i8259_cascade(void)
{
	struct device_node *np, *old, *found = NULL;
	unsigned int cascade;
	const u32 *addrp;
	unsigned long intack = 0;
	int naddr;

	for_each_node_by_type(np, "interrupt-controller") {
		if (of_device_is_compatible(np, "chrp,iic")) {
			found = np;
			break;
		}
	}

	if (found == NULL) {
		printk(KERN_DEBUG "pic: no ISA interrupt controller\n");
		return;
	}

	cascade = irq_of_parse_and_map(found, 0);
	if (cascade == NO_IRQ) {
		printk(KERN_ERR "pic: failed to map cascade interrupt");
		return;
	}
	pr_debug("pic: cascade mapped to irq %d\n", cascade);

	for (old = of_node_get(found); old != NULL ; old = np) {
		np = of_get_parent(old);
		of_node_put(old);
		if (np == NULL)
			break;
		if (strcmp(np->name, "pci") != 0)
			continue;
		addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL);
		if (addrp == NULL)
			continue;
		naddr = of_n_addr_cells(np);
		intack = addrp[naddr-1];
		if (naddr > 1)
			intack |= ((unsigned long)addrp[naddr-2]) << 32;
	}
	if (intack)
		printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack);
	i8259_init(found, intack);
	of_node_put(found);
	irq_set_chained_handler(cascade, pseries_8259_cascade);
}

static void __init pseries_mpic_init_IRQ(void)
{
	struct device_node *np;
	const unsigned int *opprop;
	unsigned long openpic_addr = 0;
	int naddr, n, i, opplen;
	struct mpic *mpic;

	np = of_find_node_by_path("/");
	naddr = of_n_addr_cells(np);
	opprop = of_get_property(np, "platform-open-pic", &opplen);
	if (opprop != 0) {
		openpic_addr = of_read_number(opprop, naddr);
		printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
	}
	of_node_put(np);

	BUG_ON(openpic_addr == 0);

	/* Setup the openpic driver */
	mpic = mpic_alloc(pSeries_mpic_node, openpic_addr,
			  MPIC_PRIMARY,
			  16, 250, /* isu size, irq count */
			  " MPIC     ");
	BUG_ON(mpic == NULL);

	/* Add ISUs */
	opplen /= sizeof(u32);
	for (n = 0, i = naddr; i < opplen; i += naddr, n++) {
		unsigned long isuaddr = of_read_number(opprop + i, naddr);
		mpic_assign_isu(mpic, n, isuaddr);
	}

	/* Setup top-level get_irq */
	ppc_md.get_irq = mpic_get_irq;

	/* All ISUs are setup, complete initialization */
	mpic_init(mpic);

	/* Look for cascade */
	pseries_setup_i8259_cascade();
}

static void __init pseries_xics_init_IRQ(void)
{
	xics_init();
	pseries_setup_i8259_cascade();
}

static void pseries_lpar_enable_pmcs(void)
{
	unsigned long set, reset;

	set = 1UL << 63;
	reset = 0;
	plpar_hcall_norets(H_PERFMON, set, reset);
}

static void __init pseries_discover_pic(void)
{
	struct device_node *np;
	const char *typep;

	for (np = NULL; (np = of_find_node_by_name(np,
						   "interrupt-controller"));) {
		typep = of_get_property(np, "compatible", NULL);
		if (strstr(typep, "open-pic")) {
			pSeries_mpic_node = of_node_get(np);
			ppc_md.init_IRQ       = pseries_mpic_init_IRQ;
			setup_kexec_cpu_down_mpic();
			smp_init_pseries_mpic();
			return;
		} else if (strstr(typep, "ppc-xicp")) {
			ppc_md.init_IRQ       = pseries_xics_init_IRQ;
			setup_kexec_cpu_down_xics();
			smp_init_pseries_xics();
			return;
		}
	}
	printk(KERN_ERR "pSeries_discover_pic: failed to recognize"
	       " interrupt-controller\n");
}

static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
{
	struct device_node *np = node;
	struct pci_dn *pci = NULL;
	int err = NOTIFY_OK;

	switch (action) {
	case PSERIES_RECONFIG_ADD:
		pci = np->parent->data;
		if (pci)
			update_dn_pci_info(np, pci->phb);
		break;
	default:
		err = NOTIFY_DONE;
		break;
	}
	return err;
}

static struct notifier_block pci_dn_reconfig_nb = {
	.notifier_call = pci_dn_reconfig_notifier,
};

#ifdef CONFIG_VIRT_CPU_ACCOUNTING
/*
 * Allocate space for the dispatch trace log for all possible cpus
 * and register the buffers with the hypervisor.  This is used for
 * computing time stolen by the hypervisor.
 */
static int alloc_dispatch_logs(void)
{
	int cpu, ret;
	struct paca_struct *pp;
	struct dtl_entry *dtl;
	struct kmem_cache *dtl_cache;

	if (!firmware_has_feature(FW_FEATURE_SPLPAR))
		return 0;

	dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES,
						DISPATCH_LOG_BYTES, 0, NULL);
	if (!dtl_cache) {
		pr_warn("Failed to create dispatch trace log buffer cache\n");
		pr_warn("Stolen time statistics will be unreliable\n");
		return 0;
	}

	for_each_possible_cpu(cpu) {
		pp = &paca[cpu];
		dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL);
		if (!dtl) {
			pr_warn("Failed to allocate dispatch trace log for cpu %d\n",
				cpu);
			pr_warn("Stolen time statistics will be unreliable\n");
			break;
		}

		pp->dtl_ridx = 0;
		pp->dispatch_log = dtl;
		pp->dispatch_log_end = dtl + N_DISPATCH_LOG;
		pp->dtl_curr = dtl;
	}

	/* Register the DTL for the current (boot) cpu */
	dtl = get_paca()->dispatch_log;
	get_paca()->dtl_ridx = 0;
	get_paca()->dtl_curr = dtl;
	get_paca()->lppaca_ptr->dtl_idx = 0;

	/* hypervisor reads buffer length from this field */
	dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES;
	ret = register_dtl(hard_smp_processor_id(), __pa(dtl));
	if (ret)
		pr_warn("DTL registration failed for boot cpu %d (%d)\n",
			smp_processor_id(), ret);
	get_paca()->lppaca_ptr->dtl_enable_mask = 2;

	return 0;
}

early_initcall(alloc_dispatch_logs);
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */

static void __init pSeries_setup_arch(void)
{
	/* Discover PIC type and setup ppc_md accordingly */
	pseries_discover_pic();

	/* openpic global configuration register (64-bit format). */
	/* openpic Interrupt Source Unit pointer (64-bit format). */
	/* python0 facility area (mmio) (64-bit format) REAL address. */

	/* init to some ~sane value until calibrate_delay() runs */
	loops_per_jiffy = 50000000;

	fwnmi_init();

	/* Find and initialize PCI host bridges */
	init_pci_config_tokens();
	find_and_init_phbs();
	pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb);
	eeh_init();

	pSeries_nvram_init();

	/* Choose an idle loop */
	if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
		vpa_init(boot_cpuid);
		if (get_lppaca()->shared_proc) {
			printk(KERN_DEBUG "Using shared processor idle loop\n");
			ppc_md.power_save = pseries_shared_idle_sleep;
		} else {
			printk(KERN_DEBUG "Using dedicated idle loop\n");
			ppc_md.power_save = pseries_dedicated_idle_sleep;
		}
	} else {
		printk(KERN_DEBUG "Using default idle loop\n");
	}

	if (firmware_has_feature(FW_FEATURE_LPAR))
		ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
	else
		ppc_md.enable_pmcs = power4_enable_pmcs;
}

static int __init pSeries_init_panel(void)
{
	/* Manually leave the kernel version on the panel. */
	ppc_md.progress("Linux ppc64\n", 0);
	ppc_md.progress(init_utsname()->version, 0);

	return 0;
}
machine_arch_initcall(pseries, pSeries_init_panel);

static int pseries_set_dabr(unsigned long dabr)
{
	return plpar_hcall_norets(H_SET_DABR, dabr);
}

static int pseries_set_xdabr(unsigned long dabr)
{
	/* We want to catch accesses from kernel and userspace */
	return plpar_hcall_norets(H_SET_XDABR, dabr,
			H_DABRX_KERNEL | H_DABRX_USER);
}

#define CMO_CHARACTERISTICS_TOKEN 44
#define CMO_MAXLENGTH 1026

void pSeries_coalesce_init(void)
{
	struct hvcall_mpp_x_data mpp_x_data;

	if (firmware_has_feature(FW_FEATURE_CMO) && !h_get_mpp_x(&mpp_x_data))
		powerpc_firmware_features |= FW_FEATURE_XCMO;
	else
		powerpc_firmware_features &= ~FW_FEATURE_XCMO;
}

/**
 * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions,
 * handle that here. (Stolen from parse_system_parameter_string)
 */
void pSeries_cmo_feature_init(void)
{
	char *ptr, *key, *value, *end;
	int call_status;
	int page_order = IOMMU_PAGE_SHIFT;

	pr_debug(" -> fw_cmo_feature_init()\n");
	spin_lock(&rtas_data_buf_lock);
	memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE);
	call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
				NULL,
				CMO_CHARACTERISTICS_TOKEN,
				__pa(rtas_data_buf),
				RTAS_DATA_BUF_SIZE);

	if (call_status != 0) {
		spin_unlock(&rtas_data_buf_lock);
		pr_debug("CMO not available\n");
		pr_debug(" <- fw_cmo_feature_init()\n");
		return;
	}

	end = rtas_data_buf + CMO_MAXLENGTH - 2;
	ptr = rtas_data_buf + 2;	/* step over strlen value */
	key = value = ptr;

	while (*ptr && (ptr <= end)) {
		/* Separate the key and value by replacing '=' with '\0' and
		 * point the value at the string after the '='
		 */
		if (ptr[0] == '=') {
			ptr[0] = '\0';
			value = ptr + 1;
		} else if (ptr[0] == '\0' || ptr[0] == ',') {
			/* Terminate the string containing the key/value pair */
			ptr[0] = '\0';

			if (key == value) {
				pr_debug("Malformed key/value pair\n");
				/* Never found a '=', end processing */
				break;
			}

			if (0 == strcmp(key, "CMOPageSize"))
				page_order = simple_strtol(value, NULL, 10);
			else if (0 == strcmp(key, "PrPSP"))
				CMO_PrPSP = simple_strtol(value, NULL, 10);
			else if (0 == strcmp(key, "SecPSP"))
				CMO_SecPSP = simple_strtol(value, NULL, 10);
			value = key = ptr + 1;
		}
		ptr++;
	}

	/* Page size is returned as the power of 2 of the page size,
	 * convert to the page size in bytes before returning
	 */
	CMO_PageSize = 1 << page_order;
	pr_debug("CMO_PageSize = %lu\n", CMO_PageSize);

	if (CMO_PrPSP != -1 || CMO_SecPSP != -1) {
		pr_info("CMO enabled\n");
		pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
		         CMO_SecPSP);
		powerpc_firmware_features |= FW_FEATURE_CMO;
		pSeries_coalesce_init();
	} else
		pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP,
		         CMO_SecPSP);
	spin_unlock(&rtas_data_buf_lock);
	pr_debug(" <- fw_cmo_feature_init()\n");
}

/*
 * Early initialization.  Relocation is on but do not reference unbolted pages
 */
static void __init pSeries_init_early(void)
{
	pr_debug(" -> pSeries_init_early()\n");

	if (firmware_has_feature(FW_FEATURE_LPAR))
		find_udbg_vterm();

	if (firmware_has_feature(FW_FEATURE_DABR))
		ppc_md.set_dabr = pseries_set_dabr;
	else if (firmware_has_feature(FW_FEATURE_XDABR))
		ppc_md.set_dabr = pseries_set_xdabr;

	pSeries_cmo_feature_init();
	iommu_init_early_pSeries();

	pr_debug(" <- pSeries_init_early()\n");
}

/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */

static int __init pSeries_probe_hypertas(unsigned long node,
					 const char *uname, int depth,
					 void *data)
{
	const char *hypertas;
	unsigned long len;

	if (depth != 1 ||
	    (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0))
		return 0;

	hypertas = of_get_flat_dt_prop(node, "ibm,hypertas-functions", &len);
	if (!hypertas)
		return 1;

	powerpc_firmware_features |= FW_FEATURE_LPAR;
	fw_feature_init(hypertas, len);

	return 1;
}

static int __init pSeries_probe(void)
{
	unsigned long root = of_get_flat_dt_root();
 	char *dtype = of_get_flat_dt_prop(root, "device_type", NULL);

 	if (dtype == NULL)
 		return 0;
 	if (strcmp(dtype, "chrp"))
		return 0;

	/* Cell blades firmware claims to be chrp while it's not. Until this
	 * is fixed, we need to avoid those here.
	 */
	if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") ||
	    of_flat_dt_is_compatible(root, "IBM,CBEA"))
		return 0;

	pr_debug("pSeries detected, looking for LPAR capability...\n");

	/* Now try to figure out if we are running on LPAR */
	of_scan_flat_dt(pSeries_probe_hypertas, NULL);

	if (firmware_has_feature(FW_FEATURE_LPAR))
		hpte_init_lpar();
	else
		hpte_init_native();

	pr_debug("Machine is%s LPAR !\n",
	         (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");

	return 1;
}


DECLARE_PER_CPU(long, smt_snooze_delay);

static void pseries_dedicated_idle_sleep(void)
{ 
	unsigned int cpu = smp_processor_id();
	unsigned long start_snooze;
	unsigned long in_purr, out_purr;
	long snooze = __get_cpu_var(smt_snooze_delay);

	/*
	 * Indicate to the HV that we are idle. Now would be
	 * a good time to find other work to dispatch.
	 */
	get_lppaca()->idle = 1;
	get_lppaca()->donate_dedicated_cpu = 1;
	in_purr = mfspr(SPRN_PURR);

	/*
	 * We come in with interrupts disabled, and need_resched()
	 * has been checked recently.  If we should poll for a little
	 * while, do so.
	 */
	if (snooze) {
		start_snooze = get_tb() + snooze * tb_ticks_per_usec;
		local_irq_enable();
		set_thread_flag(TIF_POLLING_NRFLAG);

		while ((snooze < 0) || (get_tb() < start_snooze)) {
			if (need_resched() || cpu_is_offline(cpu))
				goto out;
			ppc64_runlatch_off();
			HMT_low();
			HMT_very_low();
		}

		HMT_medium();
		clear_thread_flag(TIF_POLLING_NRFLAG);
		smp_mb();
		local_irq_disable();
		if (need_resched() || cpu_is_offline(cpu))
			goto out;
	}

	cede_processor();

out:
	HMT_medium();
	out_purr = mfspr(SPRN_PURR);
	get_lppaca()->wait_state_cycles += out_purr - in_purr;
	get_lppaca()->donate_dedicated_cpu = 0;
	get_lppaca()->idle = 0;
}

static void pseries_shared_idle_sleep(void)
{
	/*
	 * Indicate to the HV that we are idle. Now would be
	 * a good time to find other work to dispatch.
	 */
	get_lppaca()->idle = 1;

	/*
	 * Yield the processor to the hypervisor.  We return if
	 * an external interrupt occurs (which are driven prior
	 * to returning here) or if a prod occurs from another
	 * processor. When returning here, external interrupts
	 * are enabled.
	 */
	cede_processor();

	get_lppaca()->idle = 0;
}

static int pSeries_pci_probe_mode(struct pci_bus *bus)
{
	if (firmware_has_feature(FW_FEATURE_LPAR))
		return PCI_PROBE_DEVTREE;
	return PCI_PROBE_NORMAL;
}

/**
 * pSeries_power_off - tell firmware about how to power off the system.
 *
 * This function calls either the power-off rtas token in normal cases
 * or the ibm,power-off-ups token (if present & requested) in case of
 * a power failure. If power-off token is used, power on will only be
 * possible with power button press. If ibm,power-off-ups token is used
 * it will allow auto poweron after power is restored.
 */
static void pSeries_power_off(void)
{
	int rc;
	int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");

	if (rtas_flash_term_hook)
		rtas_flash_term_hook(SYS_POWER_OFF);

	if (rtas_poweron_auto == 0 ||
		rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
		rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
		printk(KERN_INFO "RTAS power-off returned %d\n", rc);
	} else {
		rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
		printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
	}
	for (;;);
}

#ifndef CONFIG_PCI
void pSeries_final_fixup(void) { }
#endif

define_machine(pseries) {
	.name			= "pSeries",
	.probe			= pSeries_probe,
	.setup_arch		= pSeries_setup_arch,
	.init_early		= pSeries_init_early,
	.show_cpuinfo		= pSeries_show_cpuinfo,
	.log_error		= pSeries_log_error,
	.pcibios_fixup		= pSeries_final_fixup,
	.pci_probe_mode		= pSeries_pci_probe_mode,
	.restart		= rtas_restart,
	.power_off		= pSeries_power_off,
	.halt			= rtas_halt,
	.panic			= rtas_os_term,
	.get_boot_time		= rtas_get_boot_time,
	.get_rtc_time		= rtas_get_rtc_time,
	.set_rtc_time		= rtas_set_rtc_time,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= rtas_progress,
	.system_reset_exception = pSeries_system_reset_exception,
	.machine_check_exception = pSeries_machine_check_exception,
};