• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  *  acpi.c - Architecture-Specific Low-Level ACPI Support
3  *
4  *  Copyright (C) 1999 VA Linux Systems
5  *  Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
6  *  Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
7  *	David Mosberger-Tang <davidm@hpl.hp.com>
8  *  Copyright (C) 2000 Intel Corp.
9  *  Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
10  *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
11  *  Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
12  *  Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
13  *  Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
14  *  Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
15  *
16  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
17  *
18  *  This program is free software; you can redistribute it and/or modify
19  *  it under the terms of the GNU General Public License as published by
20  *  the Free Software Foundation; either version 2 of the License, or
21  *  (at your option) any later version.
22  *
23  *  This program is distributed in the hope that it will be useful,
24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
26  *  GNU General Public License for more details.
27  *
28  *  You should have received a copy of the GNU General Public License
29  *  along with this program; if not, write to the Free Software
30  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31  *
32  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
33  */
34 
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/kernel.h>
38 #include <linux/sched.h>
39 #include <linux/smp.h>
40 #include <linux/string.h>
41 #include <linux/types.h>
42 #include <linux/irq.h>
43 #include <linux/acpi.h>
44 #include <linux/efi.h>
45 #include <linux/mmzone.h>
46 #include <linux/nodemask.h>
47 #include <linux/slab.h>
48 #include <acpi/processor.h>
49 #include <asm/io.h>
50 #include <asm/iosapic.h>
51 #include <asm/machvec.h>
52 #include <asm/page.h>
53 #include <asm/numa.h>
54 #include <asm/sal.h>
55 #include <asm/cyclone.h>
56 
57 #define PREFIX			"ACPI: "
58 
59 int acpi_lapic;
60 unsigned int acpi_cpei_override;
61 unsigned int acpi_cpei_phys_cpuid;
62 
63 unsigned long acpi_wakeup_address = 0;
64 
65 #ifdef CONFIG_IA64_GENERIC
acpi_find_rsdp(void)66 static unsigned long __init acpi_find_rsdp(void)
67 {
68 	unsigned long rsdp_phys = 0;
69 
70 	if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
71 		rsdp_phys = efi.acpi20;
72 	else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
73 		printk(KERN_WARNING PREFIX
74 		       "v1.0/r0.71 tables no longer supported\n");
75 	return rsdp_phys;
76 }
77 
78 const char __init *
acpi_get_sysname(void)79 acpi_get_sysname(void)
80 {
81 	unsigned long rsdp_phys;
82 	struct acpi_table_rsdp *rsdp;
83 	struct acpi_table_xsdt *xsdt;
84 	struct acpi_table_header *hdr;
85 #ifdef CONFIG_INTEL_IOMMU
86 	u64 i, nentries;
87 #endif
88 
89 	rsdp_phys = acpi_find_rsdp();
90 	if (!rsdp_phys) {
91 		printk(KERN_ERR
92 		       "ACPI 2.0 RSDP not found, default to \"dig\"\n");
93 		return "dig";
94 	}
95 
96 	rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
97 	if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
98 		printk(KERN_ERR
99 		       "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
100 		return "dig";
101 	}
102 
103 	xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
104 	hdr = &xsdt->header;
105 	if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
106 		printk(KERN_ERR
107 		       "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
108 		return "dig";
109 	}
110 
111 	if (!strcmp(hdr->oem_id, "HP")) {
112 		return "hpzx1";
113 	} else if (!strcmp(hdr->oem_id, "SGI")) {
114 		if (!strcmp(hdr->oem_table_id + 4, "UV"))
115 			return "uv";
116 		else
117 			return "sn2";
118 	}
119 
120 #ifdef CONFIG_INTEL_IOMMU
121 	/* Look for Intel IOMMU */
122 	nentries = (hdr->length - sizeof(*hdr)) /
123 			 sizeof(xsdt->table_offset_entry[0]);
124 	for (i = 0; i < nentries; i++) {
125 		hdr = __va(xsdt->table_offset_entry[i]);
126 		if (strncmp(hdr->signature, ACPI_SIG_DMAR,
127 			sizeof(ACPI_SIG_DMAR) - 1) == 0)
128 			return "dig_vtd";
129 	}
130 #endif
131 
132 	return "dig";
133 }
134 #endif /* CONFIG_IA64_GENERIC */
135 
136 #define ACPI_MAX_PLATFORM_INTERRUPTS	256
137 
138 /* Array to record platform interrupt vectors for generic interrupt routing. */
139 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
140 	[0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
141 };
142 
143 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
144 
145 /*
146  * Interrupt routing API for device drivers.  Provides interrupt vector for
147  * a generic platform event.  Currently only CPEI is implemented.
148  */
acpi_request_vector(u32 int_type)149 int acpi_request_vector(u32 int_type)
150 {
151 	int vector = -1;
152 
153 	if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
154 		/* corrected platform error interrupt */
155 		vector = platform_intr_list[int_type];
156 	} else
157 		printk(KERN_ERR
158 		       "acpi_request_vector(): invalid interrupt type\n");
159 	return vector;
160 }
161 
__acpi_map_table(unsigned long phys_addr,unsigned long size)162 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
163 {
164 	return __va(phys_addr);
165 }
166 
__acpi_unmap_table(char * map,unsigned long size)167 void __init __acpi_unmap_table(char *map, unsigned long size)
168 {
169 }
170 
171 /* --------------------------------------------------------------------------
172                             Boot-time Table Parsing
173    -------------------------------------------------------------------------- */
174 
175 static int available_cpus __initdata;
176 struct acpi_table_madt *acpi_madt __initdata;
177 static u8 has_8259;
178 
179 static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,const unsigned long end)180 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
181 			  const unsigned long end)
182 {
183 	struct acpi_madt_local_apic_override *lapic;
184 
185 	lapic = (struct acpi_madt_local_apic_override *)header;
186 
187 	if (BAD_MADT_ENTRY(lapic, end))
188 		return -EINVAL;
189 
190 	if (lapic->address) {
191 		iounmap(ipi_base_addr);
192 		ipi_base_addr = ioremap(lapic->address, 0);
193 	}
194 	return 0;
195 }
196 
197 static int __init
acpi_parse_lsapic(struct acpi_subtable_header * header,const unsigned long end)198 acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
199 {
200 	struct acpi_madt_local_sapic *lsapic;
201 
202 	lsapic = (struct acpi_madt_local_sapic *)header;
203 
204 	/*Skip BAD_MADT_ENTRY check, as lsapic size could vary */
205 
206 	if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
207 #ifdef CONFIG_SMP
208 		smp_boot_data.cpu_phys_id[available_cpus] =
209 		    (lsapic->id << 8) | lsapic->eid;
210 #endif
211 		++available_cpus;
212 	}
213 
214 	total_cpus++;
215 	return 0;
216 }
217 
218 static int __init
acpi_parse_lapic_nmi(struct acpi_subtable_header * header,const unsigned long end)219 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
220 {
221 	struct acpi_madt_local_apic_nmi *lacpi_nmi;
222 
223 	lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
224 
225 	if (BAD_MADT_ENTRY(lacpi_nmi, end))
226 		return -EINVAL;
227 
228 	/* TBD: Support lapic_nmi entries */
229 	return 0;
230 }
231 
232 static int __init
acpi_parse_iosapic(struct acpi_subtable_header * header,const unsigned long end)233 acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
234 {
235 	struct acpi_madt_io_sapic *iosapic;
236 
237 	iosapic = (struct acpi_madt_io_sapic *)header;
238 
239 	if (BAD_MADT_ENTRY(iosapic, end))
240 		return -EINVAL;
241 
242 	return iosapic_init(iosapic->address, iosapic->global_irq_base);
243 }
244 
245 static unsigned int __initdata acpi_madt_rev;
246 
247 static int __init
acpi_parse_plat_int_src(struct acpi_subtable_header * header,const unsigned long end)248 acpi_parse_plat_int_src(struct acpi_subtable_header * header,
249 			const unsigned long end)
250 {
251 	struct acpi_madt_interrupt_source *plintsrc;
252 	int vector;
253 
254 	plintsrc = (struct acpi_madt_interrupt_source *)header;
255 
256 	if (BAD_MADT_ENTRY(plintsrc, end))
257 		return -EINVAL;
258 
259 	/*
260 	 * Get vector assignment for this interrupt, set attributes,
261 	 * and program the IOSAPIC routing table.
262 	 */
263 	vector = iosapic_register_platform_intr(plintsrc->type,
264 						plintsrc->global_irq,
265 						plintsrc->io_sapic_vector,
266 						plintsrc->eid,
267 						plintsrc->id,
268 						((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
269 						 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
270 						IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
271 						((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
272 						 ACPI_MADT_TRIGGER_EDGE) ?
273 						IOSAPIC_EDGE : IOSAPIC_LEVEL);
274 
275 	platform_intr_list[plintsrc->type] = vector;
276 	if (acpi_madt_rev > 1) {
277 		acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
278 	}
279 
280 	/*
281 	 * Save the physical id, so we can check when its being removed
282 	 */
283 	acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
284 
285 	return 0;
286 }
287 
288 #ifdef CONFIG_HOTPLUG_CPU
can_cpei_retarget(void)289 unsigned int can_cpei_retarget(void)
290 {
291 	extern int cpe_vector;
292 	extern unsigned int force_cpei_retarget;
293 
294 	/*
295 	 * Only if CPEI is supported and the override flag
296 	 * is present, otherwise return that its re-targettable
297 	 * if we are in polling mode.
298 	 */
299 	if (cpe_vector > 0) {
300 		if (acpi_cpei_override || force_cpei_retarget)
301 			return 1;
302 		else
303 			return 0;
304 	}
305 	return 1;
306 }
307 
is_cpu_cpei_target(unsigned int cpu)308 unsigned int is_cpu_cpei_target(unsigned int cpu)
309 {
310 	unsigned int logical_id;
311 
312 	logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
313 
314 	if (logical_id == cpu)
315 		return 1;
316 	else
317 		return 0;
318 }
319 
set_cpei_target_cpu(unsigned int cpu)320 void set_cpei_target_cpu(unsigned int cpu)
321 {
322 	acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
323 }
324 #endif
325 
get_cpei_target_cpu(void)326 unsigned int get_cpei_target_cpu(void)
327 {
328 	return acpi_cpei_phys_cpuid;
329 }
330 
331 static int __init
acpi_parse_int_src_ovr(struct acpi_subtable_header * header,const unsigned long end)332 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
333 		       const unsigned long end)
334 {
335 	struct acpi_madt_interrupt_override *p;
336 
337 	p = (struct acpi_madt_interrupt_override *)header;
338 
339 	if (BAD_MADT_ENTRY(p, end))
340 		return -EINVAL;
341 
342 	iosapic_override_isa_irq(p->source_irq, p->global_irq,
343 				 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
344 				  ACPI_MADT_POLARITY_ACTIVE_LOW) ?
345 				 IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH,
346 				 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
347 				 ACPI_MADT_TRIGGER_LEVEL) ?
348 				 IOSAPIC_LEVEL : IOSAPIC_EDGE);
349 	return 0;
350 }
351 
352 static int __init
acpi_parse_nmi_src(struct acpi_subtable_header * header,const unsigned long end)353 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
354 {
355 	struct acpi_madt_nmi_source *nmi_src;
356 
357 	nmi_src = (struct acpi_madt_nmi_source *)header;
358 
359 	if (BAD_MADT_ENTRY(nmi_src, end))
360 		return -EINVAL;
361 
362 	/* TBD: Support nimsrc entries */
363 	return 0;
364 }
365 
acpi_madt_oem_check(char * oem_id,char * oem_table_id)366 static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
367 {
368 	if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
369 
370 		/*
371 		 * Unfortunately ITC_DRIFT is not yet part of the
372 		 * official SAL spec, so the ITC_DRIFT bit is not
373 		 * set by the BIOS on this hardware.
374 		 */
375 		sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
376 
377 		cyclone_setup();
378 	}
379 }
380 
acpi_parse_madt(struct acpi_table_header * table)381 static int __init acpi_parse_madt(struct acpi_table_header *table)
382 {
383 	if (!table)
384 		return -EINVAL;
385 
386 	acpi_madt = (struct acpi_table_madt *)table;
387 
388 	acpi_madt_rev = acpi_madt->header.revision;
389 
390 	/* remember the value for reference after free_initmem() */
391 #ifdef CONFIG_ITANIUM
392 	has_8259 = 1;		/* Firmware on old Itanium systems is broken */
393 #else
394 	has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
395 #endif
396 	iosapic_system_init(has_8259);
397 
398 	/* Get base address of IPI Message Block */
399 
400 	if (acpi_madt->address)
401 		ipi_base_addr = ioremap(acpi_madt->address, 0);
402 
403 	printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
404 
405 	acpi_madt_oem_check(acpi_madt->header.oem_id,
406 			    acpi_madt->header.oem_table_id);
407 
408 	return 0;
409 }
410 
411 #ifdef CONFIG_ACPI_NUMA
412 
413 #undef SLIT_DEBUG
414 
415 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
416 
417 static int __initdata srat_num_cpus;	/* number of cpus */
418 static u32 pxm_flag[PXM_FLAG_LEN];
419 #define pxm_bit_set(bit)	(set_bit(bit,(void *)pxm_flag))
420 #define pxm_bit_test(bit)	(test_bit(bit,(void *)pxm_flag))
421 static struct acpi_table_slit __initdata *slit_table;
422 cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
423 
424 static int __init
get_processor_proximity_domain(struct acpi_srat_cpu_affinity * pa)425 get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
426 {
427 	int pxm;
428 
429 	pxm = pa->proximity_domain_lo;
430 	if (ia64_platform_is("sn2") || acpi_srat_revision >= 2)
431 		pxm += pa->proximity_domain_hi[0] << 8;
432 	return pxm;
433 }
434 
435 static int __init
get_memory_proximity_domain(struct acpi_srat_mem_affinity * ma)436 get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
437 {
438 	int pxm;
439 
440 	pxm = ma->proximity_domain;
441 	if (!ia64_platform_is("sn2") && acpi_srat_revision <= 1)
442 		pxm &= 0xff;
443 
444 	return pxm;
445 }
446 
447 /*
448  * ACPI 2.0 SLIT (System Locality Information Table)
449  * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
450  */
acpi_numa_slit_init(struct acpi_table_slit * slit)451 void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
452 {
453 	u32 len;
454 
455 	len = sizeof(struct acpi_table_header) + 8
456 	    + slit->locality_count * slit->locality_count;
457 	if (slit->header.length != len) {
458 		printk(KERN_ERR
459 		       "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
460 		       len, slit->header.length);
461 		return;
462 	}
463 	slit_table = slit;
464 }
465 
466 void __init
acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity * pa)467 acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
468 {
469 	int pxm;
470 
471 	if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
472 		return;
473 
474 	if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
475 		printk_once(KERN_WARNING
476 			    "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
477 			    ARRAY_SIZE(node_cpuid));
478 		return;
479 	}
480 	pxm = get_processor_proximity_domain(pa);
481 
482 	/* record this node in proximity bitmap */
483 	pxm_bit_set(pxm);
484 
485 	node_cpuid[srat_num_cpus].phys_id =
486 	    (pa->apic_id << 8) | (pa->local_sapic_eid);
487 	/* nid should be overridden as logical node id later */
488 	node_cpuid[srat_num_cpus].nid = pxm;
489 	cpu_set(srat_num_cpus, early_cpu_possible_map);
490 	srat_num_cpus++;
491 }
492 
493 int __init
acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity * ma)494 acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
495 {
496 	unsigned long paddr, size;
497 	int pxm;
498 	struct node_memblk_s *p, *q, *pend;
499 
500 	pxm = get_memory_proximity_domain(ma);
501 
502 	/* fill node memory chunk structure */
503 	paddr = ma->base_address;
504 	size = ma->length;
505 
506 	/* Ignore disabled entries */
507 	if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
508 		return -1;
509 
510 	/* record this node in proximity bitmap */
511 	pxm_bit_set(pxm);
512 
513 	/* Insertion sort based on base address */
514 	pend = &node_memblk[num_node_memblks];
515 	for (p = &node_memblk[0]; p < pend; p++) {
516 		if (paddr < p->start_paddr)
517 			break;
518 	}
519 	if (p < pend) {
520 		for (q = pend - 1; q >= p; q--)
521 			*(q + 1) = *q;
522 	}
523 	p->start_paddr = paddr;
524 	p->size = size;
525 	p->nid = pxm;
526 	num_node_memblks++;
527 	return 0;
528 }
529 
acpi_numa_arch_fixup(void)530 void __init acpi_numa_arch_fixup(void)
531 {
532 	int i, j, node_from, node_to;
533 
534 	/* If there's no SRAT, fix the phys_id and mark node 0 online */
535 	if (srat_num_cpus == 0) {
536 		node_set_online(0);
537 		node_cpuid[0].phys_id = hard_smp_processor_id();
538 		return;
539 	}
540 
541 	/*
542 	 * MCD - This can probably be dropped now.  No need for pxm ID to node ID
543 	 * mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES.
544 	 */
545 	nodes_clear(node_online_map);
546 	for (i = 0; i < MAX_PXM_DOMAINS; i++) {
547 		if (pxm_bit_test(i)) {
548 			int nid = acpi_map_pxm_to_node(i);
549 			node_set_online(nid);
550 		}
551 	}
552 
553 	/* set logical node id in memory chunk structure */
554 	for (i = 0; i < num_node_memblks; i++)
555 		node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
556 
557 	/* assign memory bank numbers for each chunk on each node */
558 	for_each_online_node(i) {
559 		int bank;
560 
561 		bank = 0;
562 		for (j = 0; j < num_node_memblks; j++)
563 			if (node_memblk[j].nid == i)
564 				node_memblk[j].bank = bank++;
565 	}
566 
567 	/* set logical node id in cpu structure */
568 	for_each_possible_early_cpu(i)
569 		node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
570 
571 	printk(KERN_INFO "Number of logical nodes in system = %d\n",
572 	       num_online_nodes());
573 	printk(KERN_INFO "Number of memory chunks in system = %d\n",
574 	       num_node_memblks);
575 
576 	if (!slit_table) {
577 		for (i = 0; i < MAX_NUMNODES; i++)
578 			for (j = 0; j < MAX_NUMNODES; j++)
579 				node_distance(i, j) = i == j ? LOCAL_DISTANCE :
580 							REMOTE_DISTANCE;
581 		return;
582 	}
583 
584 	memset(numa_slit, -1, sizeof(numa_slit));
585 	for (i = 0; i < slit_table->locality_count; i++) {
586 		if (!pxm_bit_test(i))
587 			continue;
588 		node_from = pxm_to_node(i);
589 		for (j = 0; j < slit_table->locality_count; j++) {
590 			if (!pxm_bit_test(j))
591 				continue;
592 			node_to = pxm_to_node(j);
593 			node_distance(node_from, node_to) =
594 			    slit_table->entry[i * slit_table->locality_count + j];
595 		}
596 	}
597 
598 #ifdef SLIT_DEBUG
599 	printk("ACPI 2.0 SLIT locality table:\n");
600 	for_each_online_node(i) {
601 		for_each_online_node(j)
602 		    printk("%03d ", node_distance(i, j));
603 		printk("\n");
604 	}
605 #endif
606 }
607 #endif				/* CONFIG_ACPI_NUMA */
608 
609 /*
610  * success: return IRQ number (>=0)
611  * failure: return < 0
612  */
acpi_register_gsi(struct device * dev,u32 gsi,int triggering,int polarity)613 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
614 {
615 	if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
616 		return gsi;
617 
618 	if (has_8259 && gsi < 16)
619 		return isa_irq_to_vector(gsi);
620 
621 	return iosapic_register_intr(gsi,
622 				     (polarity ==
623 				      ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
624 				     IOSAPIC_POL_LOW,
625 				     (triggering ==
626 				      ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
627 				     IOSAPIC_LEVEL);
628 }
629 EXPORT_SYMBOL_GPL(acpi_register_gsi);
630 
acpi_unregister_gsi(u32 gsi)631 void acpi_unregister_gsi(u32 gsi)
632 {
633 	if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
634 		return;
635 
636 	if (has_8259 && gsi < 16)
637 		return;
638 
639 	iosapic_unregister_intr(gsi);
640 }
641 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
642 
acpi_parse_fadt(struct acpi_table_header * table)643 static int __init acpi_parse_fadt(struct acpi_table_header *table)
644 {
645 	struct acpi_table_header *fadt_header;
646 	struct acpi_table_fadt *fadt;
647 
648 	if (!table)
649 		return -EINVAL;
650 
651 	fadt_header = (struct acpi_table_header *)table;
652 	if (fadt_header->revision != 3)
653 		return -ENODEV;	/* Only deal with ACPI 2.0 FADT */
654 
655 	fadt = (struct acpi_table_fadt *)fadt_header;
656 
657 	acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
658 				 ACPI_ACTIVE_LOW);
659 	return 0;
660 }
661 
early_acpi_boot_init(void)662 int __init early_acpi_boot_init(void)
663 {
664 	int ret;
665 
666 	/*
667 	 * do a partial walk of MADT to determine how many CPUs
668 	 * we have including offline CPUs
669 	 */
670 	if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
671 		printk(KERN_ERR PREFIX "Can't find MADT\n");
672 		return 0;
673 	}
674 
675 	ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
676 		acpi_parse_lsapic, NR_CPUS);
677 	if (ret < 1)
678 		printk(KERN_ERR PREFIX
679 		       "Error parsing MADT - no LAPIC entries\n");
680 	else
681 		acpi_lapic = 1;
682 
683 #ifdef CONFIG_SMP
684 	if (available_cpus == 0) {
685 		printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
686 		printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
687 		smp_boot_data.cpu_phys_id[available_cpus] =
688 		    hard_smp_processor_id();
689 		available_cpus = 1;	/* We've got at least one of these, no? */
690 	}
691 	smp_boot_data.cpu_count = available_cpus;
692 #endif
693 	/* Make boot-up look pretty */
694 	printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
695 	       total_cpus);
696 
697 	return 0;
698 }
699 
acpi_boot_init(void)700 int __init acpi_boot_init(void)
701 {
702 
703 	/*
704 	 * MADT
705 	 * ----
706 	 * Parse the Multiple APIC Description Table (MADT), if exists.
707 	 * Note that this table provides platform SMP configuration
708 	 * information -- the successor to MPS tables.
709 	 */
710 
711 	if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
712 		printk(KERN_ERR PREFIX "Can't find MADT\n");
713 		goto skip_madt;
714 	}
715 
716 	/* Local APIC */
717 
718 	if (acpi_table_parse_madt
719 	    (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
720 		printk(KERN_ERR PREFIX
721 		       "Error parsing LAPIC address override entry\n");
722 
723 	if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
724 	    < 0)
725 		printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
726 
727 	/* I/O APIC */
728 
729 	if (acpi_table_parse_madt
730 	    (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
731 		if (!ia64_platform_is("sn2"))
732 			printk(KERN_ERR PREFIX
733 			       "Error parsing MADT - no IOSAPIC entries\n");
734 	}
735 
736 	/* System-Level Interrupt Routing */
737 
738 	if (acpi_table_parse_madt
739 	    (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
740 	     ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
741 		printk(KERN_ERR PREFIX
742 		       "Error parsing platform interrupt source entry\n");
743 
744 	if (acpi_table_parse_madt
745 	    (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
746 		printk(KERN_ERR PREFIX
747 		       "Error parsing interrupt source overrides entry\n");
748 
749 	if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
750 		printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
751       skip_madt:
752 
753 	/*
754 	 * FADT says whether a legacy keyboard controller is present.
755 	 * The FADT also contains an SCI_INT line, by which the system
756 	 * gets interrupts such as power and sleep buttons.  If it's not
757 	 * on a Legacy interrupt, it needs to be setup.
758 	 */
759 	if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
760 		printk(KERN_ERR PREFIX "Can't find FADT\n");
761 
762 #ifdef CONFIG_ACPI_NUMA
763 #ifdef CONFIG_SMP
764 	if (srat_num_cpus == 0) {
765 		int cpu, i = 1;
766 		for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
767 			if (smp_boot_data.cpu_phys_id[cpu] !=
768 			    hard_smp_processor_id())
769 				node_cpuid[i++].phys_id =
770 				    smp_boot_data.cpu_phys_id[cpu];
771 	}
772 #endif
773 	build_cpu_to_node_map();
774 #endif
775 	return 0;
776 }
777 
acpi_gsi_to_irq(u32 gsi,unsigned int * irq)778 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
779 {
780 	int tmp;
781 
782 	if (has_8259 && gsi < 16)
783 		*irq = isa_irq_to_vector(gsi);
784 	else {
785 		tmp = gsi_to_irq(gsi);
786 		if (tmp == -1)
787 			return -1;
788 		*irq = tmp;
789 	}
790 	return 0;
791 }
792 
acpi_isa_irq_to_gsi(unsigned isa_irq,u32 * gsi)793 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
794 {
795 	if (isa_irq >= 16)
796 		return -1;
797 	*gsi = isa_irq;
798 	return 0;
799 }
800 
801 /*
802  *  ACPI based hotplug CPU support
803  */
804 #ifdef CONFIG_ACPI_HOTPLUG_CPU
acpi_map_cpu2node(acpi_handle handle,int cpu,int physid)805 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
806 {
807 #ifdef CONFIG_ACPI_NUMA
808 	/*
809 	 * We don't have cpu-only-node hotadd. But if the system equips
810 	 * SRAT table, pxm is already found and node is ready.
811   	 * So, just pxm_to_nid(pxm) is OK.
812 	 * This code here is for the system which doesn't have full SRAT
813   	 * table for possible cpus.
814 	 */
815 	node_cpuid[cpu].phys_id = physid;
816 	node_cpuid[cpu].nid = acpi_get_node(handle);
817 #endif
818 	return 0;
819 }
820 
821 int additional_cpus __initdata = -1;
822 
setup_additional_cpus(char * s)823 static __init int setup_additional_cpus(char *s)
824 {
825 	if (s)
826 		additional_cpus = simple_strtol(s, NULL, 0);
827 
828 	return 0;
829 }
830 
831 early_param("additional_cpus", setup_additional_cpus);
832 
833 /*
834  * cpu_possible_mask should be static, it cannot change as CPUs
835  * are onlined, or offlined. The reason is per-cpu data-structures
836  * are allocated by some modules at init time, and dont expect to
837  * do this dynamically on cpu arrival/departure.
838  * cpu_present_mask on the other hand can change dynamically.
839  * In case when cpu_hotplug is not compiled, then we resort to current
840  * behaviour, which is cpu_possible == cpu_present.
841  * - Ashok Raj
842  *
843  * Three ways to find out the number of additional hotplug CPUs:
844  * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
845  * - The user can overwrite it with additional_cpus=NUM
846  * - Otherwise don't reserve additional CPUs.
847  */
prefill_possible_map(void)848 __init void prefill_possible_map(void)
849 {
850 	int i;
851 	int possible, disabled_cpus;
852 
853 	disabled_cpus = total_cpus - available_cpus;
854 
855  	if (additional_cpus == -1) {
856  		if (disabled_cpus > 0)
857 			additional_cpus = disabled_cpus;
858  		else
859 			additional_cpus = 0;
860  	}
861 
862 	possible = available_cpus + additional_cpus;
863 
864 	if (possible > nr_cpu_ids)
865 		possible = nr_cpu_ids;
866 
867 	printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
868 		possible, max((possible - available_cpus), 0));
869 
870 	for (i = 0; i < possible; i++)
871 		set_cpu_possible(i, true);
872 }
873 
_acpi_map_lsapic(acpi_handle handle,int physid,int * pcpu)874 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
875 {
876 	cpumask_t tmp_map;
877 	int cpu;
878 
879 	cpumask_complement(&tmp_map, cpu_present_mask);
880 	cpu = cpumask_first(&tmp_map);
881 	if (cpu >= nr_cpu_ids)
882 		return -EINVAL;
883 
884 	acpi_map_cpu2node(handle, cpu, physid);
885 
886 	set_cpu_present(cpu, true);
887 	ia64_cpu_to_sapicid[cpu] = physid;
888 
889 	acpi_processor_set_pdc(handle);
890 
891 	*pcpu = cpu;
892 	return (0);
893 }
894 
895 /* wrapper to silence section mismatch warning */
acpi_map_lsapic(acpi_handle handle,int physid,int * pcpu)896 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
897 {
898 	return _acpi_map_lsapic(handle, physid, pcpu);
899 }
900 EXPORT_SYMBOL(acpi_map_lsapic);
901 
acpi_unmap_lsapic(int cpu)902 int acpi_unmap_lsapic(int cpu)
903 {
904 	ia64_cpu_to_sapicid[cpu] = -1;
905 	set_cpu_present(cpu, false);
906 
907 #ifdef CONFIG_ACPI_NUMA
908 	/* NUMA specific cleanup's */
909 #endif
910 
911 	return (0);
912 }
913 
914 EXPORT_SYMBOL(acpi_unmap_lsapic);
915 #endif				/* CONFIG_ACPI_HOTPLUG_CPU */
916 
917 #ifdef CONFIG_ACPI_NUMA
acpi_map_iosapic(acpi_handle handle,u32 depth,void * context,void ** ret)918 static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
919 				    void *context, void **ret)
920 {
921 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
922 	union acpi_object *obj;
923 	struct acpi_madt_io_sapic *iosapic;
924 	unsigned int gsi_base;
925 	int node;
926 
927 	/* Only care about objects w/ a method that returns the MADT */
928 	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
929 		return AE_OK;
930 
931 	if (!buffer.length || !buffer.pointer)
932 		return AE_OK;
933 
934 	obj = buffer.pointer;
935 	if (obj->type != ACPI_TYPE_BUFFER ||
936 	    obj->buffer.length < sizeof(*iosapic)) {
937 		kfree(buffer.pointer);
938 		return AE_OK;
939 	}
940 
941 	iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
942 
943 	if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
944 		kfree(buffer.pointer);
945 		return AE_OK;
946 	}
947 
948 	gsi_base = iosapic->global_irq_base;
949 
950 	kfree(buffer.pointer);
951 
952 	/* OK, it's an IOSAPIC MADT entry; associate it with a node */
953 	node = acpi_get_node(handle);
954 	if (node == NUMA_NO_NODE || !node_online(node) ||
955 	    cpumask_empty(cpumask_of_node(node)))
956 		return AE_OK;
957 
958 	/* We know a gsi to node mapping! */
959 	map_iosapic_to_node(gsi_base, node);
960 	return AE_OK;
961 }
962 
963 static int __init
acpi_map_iosapics(void)964 acpi_map_iosapics (void)
965 {
966 	acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
967 	return 0;
968 }
969 
970 fs_initcall(acpi_map_iosapics);
971 #endif				/* CONFIG_ACPI_NUMA */
972 
acpi_register_ioapic(acpi_handle handle,u64 phys_addr,u32 gsi_base)973 int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
974 {
975 	int err;
976 
977 	if ((err = iosapic_init(phys_addr, gsi_base)))
978 		return err;
979 
980 #ifdef CONFIG_ACPI_NUMA
981 	acpi_map_iosapic(handle, 0, NULL, NULL);
982 #endif				/* CONFIG_ACPI_NUMA */
983 
984 	return 0;
985 }
986 
987 EXPORT_SYMBOL(acpi_register_ioapic);
988 
acpi_unregister_ioapic(acpi_handle handle,u32 gsi_base)989 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
990 {
991 	return iosapic_remove(gsi_base);
992 }
993 
994 EXPORT_SYMBOL(acpi_unregister_ioapic);
995 
996 /*
997  * acpi_suspend_lowlevel() - save kernel state and suspend.
998  *
999  * TBD when when IA64 starts to support suspend...
1000  */
acpi_suspend_lowlevel(void)1001 int acpi_suspend_lowlevel(void) { return 0; }
1002