2 * acpi.c - Architecture-Specific Low-Level ACPI Support
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>
15 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License as published by
19 * the Free Software Foundation; either version 2 of the License, or
20 * (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
34 #include <linux/config.h>
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>
47 #include <asm/iosapic.h>
48 #include <asm/machvec.h>
50 #include <asm/system.h>
53 #include <asm/cyclone.h>
55 #define BAD_MADT_ENTRY(entry, end) ( \
56 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
57 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
59 #define PREFIX "ACPI: "
61 void (*pm_idle) (void);
62 EXPORT_SYMBOL(pm_idle);
63 void (*pm_power_off) (void);
65 unsigned char acpi_kbd_controller_present = 1;
66 unsigned char acpi_legacy_devices;
69 acpi_get_sysname (void)
71 #ifdef CONFIG_IA64_GENERIC
72 unsigned long rsdp_phys;
73 struct acpi20_table_rsdp *rsdp;
74 struct acpi_table_xsdt *xsdt;
75 struct acpi_table_header *hdr;
77 rsdp_phys = acpi_find_rsdp();
79 printk(KERN_ERR "ACPI 2.0 RSDP not found, default to \"dig\"\n");
83 rsdp = (struct acpi20_table_rsdp *) __va(rsdp_phys);
84 if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) {
85 printk(KERN_ERR "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
89 xsdt = (struct acpi_table_xsdt *) __va(rsdp->xsdt_address);
91 if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 1)) {
92 printk(KERN_ERR "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
96 if (!strcmp(hdr->oem_id, "HP")) {
99 else if (!strcmp(hdr->oem_id, "SGI")) {
105 # if defined (CONFIG_IA64_HP_SIM)
107 # elif defined (CONFIG_IA64_HP_ZX1)
109 # elif defined (CONFIG_IA64_SGI_SN2)
111 # elif defined (CONFIG_IA64_DIG)
114 # error Unknown platform. Fix acpi.c.
119 #ifdef CONFIG_ACPI_BOOT
121 #define ACPI_MAX_PLATFORM_INTERRUPTS 256
123 /* Array to record platform interrupt vectors for generic interrupt routing. */
124 int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
125 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
128 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
131 * Interrupt routing API for device drivers. Provides interrupt vector for
132 * a generic platform event. Currently only CPEI is implemented.
135 acpi_request_vector (u32 int_type)
139 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
140 /* corrected platform error interrupt */
141 vector = platform_intr_list[int_type];
143 printk(KERN_ERR "acpi_request_vector(): invalid interrupt type\n");
148 __acpi_map_table (unsigned long phys_addr, unsigned long size)
150 return __va(phys_addr);
153 /* --------------------------------------------------------------------------
154 Boot-time Table Parsing
155 -------------------------------------------------------------------------- */
157 static int total_cpus __initdata;
158 static int available_cpus __initdata;
159 struct acpi_table_madt * acpi_madt __initdata;
164 acpi_parse_lapic_addr_ovr (
165 acpi_table_entry_header *header, const unsigned long end)
167 struct acpi_table_lapic_addr_ovr *lapic;
169 lapic = (struct acpi_table_lapic_addr_ovr *) header;
171 if (BAD_MADT_ENTRY(lapic, end))
174 acpi_table_print_madt_entry(header);
176 if (lapic->address) {
177 iounmap((void *) ipi_base_addr);
178 ipi_base_addr = (unsigned long) ioremap(lapic->address, 0);
185 acpi_parse_lsapic (acpi_table_entry_header *header, const unsigned long end)
187 struct acpi_table_lsapic *lsapic;
189 lsapic = (struct acpi_table_lsapic *) header;
191 if (BAD_MADT_ENTRY(lsapic, end))
194 acpi_table_print_madt_entry(header);
196 printk(KERN_INFO "CPU %d (0x%04x)", total_cpus, (lsapic->id << 8) | lsapic->eid);
198 if (!lsapic->flags.enabled)
203 smp_boot_data.cpu_phys_id[available_cpus] = (lsapic->id << 8) | lsapic->eid;
204 if (hard_smp_processor_id()
205 == (unsigned int) smp_boot_data.cpu_phys_id[available_cpus])
219 acpi_parse_lapic_nmi (acpi_table_entry_header *header, const unsigned long end)
221 struct acpi_table_lapic_nmi *lacpi_nmi;
223 lacpi_nmi = (struct acpi_table_lapic_nmi*) header;
225 if (BAD_MADT_ENTRY(lacpi_nmi, end))
228 acpi_table_print_madt_entry(header);
230 /* TBD: Support lapic_nmi entries */
236 acpi_parse_iosapic (acpi_table_entry_header *header, const unsigned long end)
238 struct acpi_table_iosapic *iosapic;
240 iosapic = (struct acpi_table_iosapic *) header;
242 if (BAD_MADT_ENTRY(iosapic, end))
245 acpi_table_print_madt_entry(header);
247 iosapic_init(iosapic->address, iosapic->global_irq_base);
254 acpi_parse_plat_int_src (
255 acpi_table_entry_header *header, const unsigned long end)
257 struct acpi_table_plat_int_src *plintsrc;
260 plintsrc = (struct acpi_table_plat_int_src *) header;
262 if (BAD_MADT_ENTRY(plintsrc, end))
265 acpi_table_print_madt_entry(header);
268 * Get vector assignment for this interrupt, set attributes,
269 * and program the IOSAPIC routing table.
271 vector = iosapic_register_platform_intr(plintsrc->type,
272 plintsrc->global_irq,
273 plintsrc->iosapic_vector,
276 (plintsrc->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
277 (plintsrc->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
279 platform_intr_list[plintsrc->type] = vector;
285 acpi_parse_int_src_ovr (
286 acpi_table_entry_header *header, const unsigned long end)
288 struct acpi_table_int_src_ovr *p;
290 p = (struct acpi_table_int_src_ovr *) header;
292 if (BAD_MADT_ENTRY(p, end))
295 acpi_table_print_madt_entry(header);
297 iosapic_override_isa_irq(p->bus_irq, p->global_irq,
298 (p->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
299 (p->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
305 acpi_parse_nmi_src (acpi_table_entry_header *header, const unsigned long end)
307 struct acpi_table_nmi_src *nmi_src;
309 nmi_src = (struct acpi_table_nmi_src*) header;
311 if (BAD_MADT_ENTRY(nmi_src, end))
314 acpi_table_print_madt_entry(header);
316 /* TBD: Support nimsrc entries */
320 /* Hook from generic ACPI tables.c */
321 void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
323 if (!strncmp(oem_id, "IBM", 3) &&
324 (!strncmp(oem_table_id, "SERMOW", 6))){
326 /* Unfortunatly ITC_DRIFT is not yet part of the
327 * official SAL spec, so the ITC_DRIFT bit is not
328 * set by the BIOS on this hardware.
330 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
332 /*Start cyclone clock*/
338 acpi_parse_madt (unsigned long phys_addr, unsigned long size)
340 if (!phys_addr || !size)
343 acpi_madt = (struct acpi_table_madt *) __va(phys_addr);
345 /* remember the value for reference after free_initmem() */
346 #ifdef CONFIG_ITANIUM
347 has_8259 = 1; /* Firmware on old Itanium systems is broken */
349 has_8259 = acpi_madt->flags.pcat_compat;
351 iosapic_system_init(has_8259);
353 /* Get base address of IPI Message Block */
355 if (acpi_madt->lapic_address)
356 ipi_base_addr = (unsigned long) ioremap(acpi_madt->lapic_address, 0);
358 printk(KERN_INFO PREFIX "Local APIC address 0x%lx\n", ipi_base_addr);
360 acpi_madt_oem_check(acpi_madt->header.oem_id,
361 acpi_madt->header.oem_table_id);
367 #ifdef CONFIG_ACPI_NUMA
371 #define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
373 static int __initdata srat_num_cpus; /* number of cpus */
374 static u32 __initdata pxm_flag[PXM_FLAG_LEN];
375 #define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
376 #define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
377 /* maps to convert between proximity domain and logical node ID */
378 int __initdata pxm_to_nid_map[MAX_PXM_DOMAINS];
379 int __initdata nid_to_pxm_map[MAX_NUMNODES];
380 static struct acpi_table_slit __initdata *slit_table;
383 * ACPI 2.0 SLIT (System Locality Information Table)
384 * http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf
387 acpi_numa_slit_init (struct acpi_table_slit *slit)
391 len = sizeof(struct acpi_table_header) + 8
392 + slit->localities * slit->localities;
393 if (slit->header.length != len) {
394 printk(KERN_ERR "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
395 len, slit->header.length);
396 memset(numa_slit, 10, sizeof(numa_slit));
403 acpi_numa_processor_affinity_init (struct acpi_table_processor_affinity *pa)
405 /* record this node in proximity bitmap */
406 pxm_bit_set(pa->proximity_domain);
408 node_cpuid[srat_num_cpus].phys_id = (pa->apic_id << 8) | (pa->lsapic_eid);
409 /* nid should be overridden as logical node id later */
410 node_cpuid[srat_num_cpus].nid = pa->proximity_domain;
415 acpi_numa_memory_affinity_init (struct acpi_table_memory_affinity *ma)
417 unsigned long paddr, size;
419 struct node_memblk_s *p, *q, *pend;
421 pxm = ma->proximity_domain;
423 /* fill node memory chunk structure */
424 paddr = ma->base_addr_hi;
425 paddr = (paddr << 32) | ma->base_addr_lo;
426 size = ma->length_hi;
427 size = (size << 32) | ma->length_lo;
429 /* Ignore disabled entries */
430 if (!ma->flags.enabled)
433 /* record this node in proximity bitmap */
436 /* Insertion sort based on base address */
437 pend = &node_memblk[num_node_memblks];
438 for (p = &node_memblk[0]; p < pend; p++) {
439 if (paddr < p->start_paddr)
443 for (q = pend - 1; q >= p; q--)
446 p->start_paddr = paddr;
453 acpi_numa_arch_fixup (void)
455 int i, j, node_from, node_to;
457 /* If there's no SRAT, fix the phys_id */
458 if (srat_num_cpus == 0) {
459 node_cpuid[0].phys_id = hard_smp_processor_id();
463 /* calculate total number of nodes in system from PXM bitmap */
464 numnodes = 0; /* init total nodes in system */
466 memset(pxm_to_nid_map, -1, sizeof(pxm_to_nid_map));
467 memset(nid_to_pxm_map, -1, sizeof(nid_to_pxm_map));
468 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
469 if (pxm_bit_test(i)) {
470 pxm_to_nid_map[i] = numnodes;
471 node_set_online(numnodes);
472 nid_to_pxm_map[numnodes++] = i;
476 /* set logical node id in memory chunk structure */
477 for (i = 0; i < num_node_memblks; i++)
478 node_memblk[i].nid = pxm_to_nid_map[node_memblk[i].nid];
480 /* assign memory bank numbers for each chunk on each node */
481 for (i = 0; i < numnodes; i++) {
485 for (j = 0; j < num_node_memblks; j++)
486 if (node_memblk[j].nid == i)
487 node_memblk[j].bank = bank++;
490 /* set logical node id in cpu structure */
491 for (i = 0; i < srat_num_cpus; i++)
492 node_cpuid[i].nid = pxm_to_nid_map[node_cpuid[i].nid];
494 printk(KERN_INFO "Number of logical nodes in system = %d\n", numnodes);
495 printk(KERN_INFO "Number of memory chunks in system = %d\n", num_node_memblks);
497 if (!slit_table) return;
498 memset(numa_slit, -1, sizeof(numa_slit));
499 for (i=0; i<slit_table->localities; i++) {
500 if (!pxm_bit_test(i))
502 node_from = pxm_to_nid_map[i];
503 for (j=0; j<slit_table->localities; j++) {
504 if (!pxm_bit_test(j))
506 node_to = pxm_to_nid_map[j];
507 node_distance(node_from, node_to) =
508 slit_table->entry[i*slit_table->localities + j];
513 printk("ACPI 2.0 SLIT locality table:\n");
514 for (i = 0; i < numnodes; i++) {
515 for (j = 0; j < numnodes; j++)
516 printk("%03d ", node_distance(i,j));
521 #endif /* CONFIG_ACPI_NUMA */
524 acpi_register_gsi (u32 gsi, int edge_level, int active_high_low)
526 if (has_8259 && gsi < 16)
527 return isa_irq_to_vector(gsi);
529 return iosapic_register_intr(gsi,
530 (active_high_low == ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
531 (edge_level == ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
533 EXPORT_SYMBOL(acpi_register_gsi);
536 acpi_parse_fadt (unsigned long phys_addr, unsigned long size)
538 struct acpi_table_header *fadt_header;
539 struct fadt_descriptor_rev2 *fadt;
541 if (!phys_addr || !size)
544 fadt_header = (struct acpi_table_header *) __va(phys_addr);
545 if (fadt_header->revision != 3)
546 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
548 fadt = (struct fadt_descriptor_rev2 *) fadt_header;
550 if (!(fadt->iapc_boot_arch & BAF_8042_KEYBOARD_CONTROLLER))
551 acpi_kbd_controller_present = 0;
553 if (fadt->iapc_boot_arch & BAF_LEGACY_DEVICES)
554 acpi_legacy_devices = 1;
556 acpi_register_gsi(fadt->sci_int, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW);
562 acpi_find_rsdp (void)
564 unsigned long rsdp_phys = 0;
567 rsdp_phys = __pa(efi.acpi20);
569 printk(KERN_WARNING PREFIX "v1.0/r0.71 tables no longer supported\n");
575 acpi_boot_init (void)
581 * Parse the Multiple APIC Description Table (MADT), if exists.
582 * Note that this table provides platform SMP configuration
583 * information -- the successor to MPS tables.
586 if (acpi_table_parse(ACPI_APIC, acpi_parse_madt) < 1) {
587 printk(KERN_ERR PREFIX "Can't find MADT\n");
593 if (acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0) < 0)
594 printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
596 if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_parse_lsapic, NR_CPUS) < 1)
597 printk(KERN_ERR PREFIX "Error parsing MADT - no LAPIC entries\n");
599 if (acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0) < 0)
600 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
604 if (acpi_table_parse_madt(ACPI_MADT_IOSAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1)
605 printk(KERN_ERR PREFIX "Error parsing MADT - no IOSAPIC entries\n");
607 /* System-Level Interrupt Routing */
609 if (acpi_table_parse_madt(ACPI_MADT_PLAT_INT_SRC, acpi_parse_plat_int_src, ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
610 printk(KERN_ERR PREFIX "Error parsing platform interrupt source entry\n");
612 if (acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, 0) < 0)
613 printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
615 if (acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, 0) < 0)
616 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
620 * FADT says whether a legacy keyboard controller is present.
621 * The FADT also contains an SCI_INT line, by which the system
622 * gets interrupts such as power and sleep buttons. If it's not
623 * on a Legacy interrupt, it needs to be setup.
625 if (acpi_table_parse(ACPI_FADT, acpi_parse_fadt) < 1)
626 printk(KERN_ERR PREFIX "Can't find FADT\n");
629 if (available_cpus == 0) {
630 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
631 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
632 smp_boot_data.cpu_phys_id[available_cpus] = hard_smp_processor_id();
633 available_cpus = 1; /* We've got at least one of these, no? */
635 smp_boot_data.cpu_count = available_cpus;
638 # ifdef CONFIG_ACPI_NUMA
639 if (srat_num_cpus == 0) {
641 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
642 if (smp_boot_data.cpu_phys_id[cpu] != hard_smp_processor_id())
643 node_cpuid[i++].phys_id = smp_boot_data.cpu_phys_id[cpu];
645 build_cpu_to_node_map();
648 /* Make boot-up look pretty */
649 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, total_cpus);
654 acpi_gsi_to_irq (u32 gsi, unsigned int *irq)
658 if (has_8259 && gsi < 16)
659 *irq = isa_irq_to_vector(gsi);
661 vector = gsi_to_vector(gsi);
670 #endif /* CONFIG_ACPI_BOOT */