2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/init.h>
27 #include <linux/config.h>
28 #include <linux/acpi.h>
29 #include <linux/efi.h>
30 #include <linux/irq.h>
31 #include <asm/pgalloc.h>
32 #include <asm/io_apic.h>
36 #include <asm/mpspec.h>
38 #if defined (CONFIG_X86_LOCAL_APIC)
39 #include <mach_apic.h>
40 #include <mach_mpparse.h>
41 #include <asm/io_apic.h>
44 #define PREFIX "ACPI: "
46 int acpi_noirq __initdata = 0; /* skip ACPI IRQ initialization */
47 int acpi_ht __initdata = 1; /* enable HT */
52 /* --------------------------------------------------------------------------
53 Boot-time Configuration
54 -------------------------------------------------------------------------- */
56 enum acpi_irq_model_id acpi_irq_model;
59 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
60 * to map the target physical address. The problem is that set_fixmap()
61 * provides a single page, and it is possible that the page is not
63 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
64 * i.e. until the next __va_range() call.
66 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
67 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
68 * count idx down while incrementing the phys address.
70 char *__acpi_map_table(unsigned long phys, unsigned long size)
72 unsigned long base, offset, mapped_size;
75 if (phys + size < 8*1024*1024)
78 offset = phys & (PAGE_SIZE - 1);
79 mapped_size = PAGE_SIZE - offset;
80 set_fixmap(FIX_ACPI_END, phys);
81 base = fix_to_virt(FIX_ACPI_END);
84 * Most cases can be covered by the below.
87 while (mapped_size < size) {
88 if (--idx < FIX_ACPI_BEGIN)
89 return 0; /* cannot handle this */
91 set_fixmap(idx, phys);
92 mapped_size += PAGE_SIZE;
95 return ((unsigned char *) base + offset);
99 #ifdef CONFIG_X86_LOCAL_APIC
101 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
106 unsigned long phys_addr,
109 struct acpi_table_madt *madt = NULL;
111 if (!phys_addr || !size)
114 madt = (struct acpi_table_madt *) __acpi_map_table(phys_addr, size);
116 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
120 if (madt->lapic_address)
121 acpi_lapic_addr = (u64) madt->lapic_address;
123 printk(KERN_INFO PREFIX "Local APIC address 0x%08x\n",
124 madt->lapic_address);
126 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
134 acpi_table_entry_header *header)
136 struct acpi_table_lapic *processor = NULL;
138 processor = (struct acpi_table_lapic*) header;
142 acpi_table_print_madt_entry(header);
144 /* no utility in registering a disabled processor */
145 if (processor->flags.enabled == 0)
149 processor->id, /* APIC ID */
150 processor->flags.enabled); /* Enabled? */
157 acpi_parse_lapic_addr_ovr (
158 acpi_table_entry_header *header)
160 struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
162 lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr*) header;
166 acpi_lapic_addr = lapic_addr_ovr->address;
172 acpi_parse_lapic_nmi (
173 acpi_table_entry_header *header)
175 struct acpi_table_lapic_nmi *lapic_nmi = NULL;
177 lapic_nmi = (struct acpi_table_lapic_nmi*) header;
181 acpi_table_print_madt_entry(header);
183 if (lapic_nmi->lint != 1)
184 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
190 #endif /*CONFIG_X86_LOCAL_APIC*/
192 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
196 acpi_table_entry_header *header)
198 struct acpi_table_ioapic *ioapic = NULL;
200 ioapic = (struct acpi_table_ioapic*) header;
204 acpi_table_print_madt_entry(header);
209 ioapic->global_irq_base);
216 acpi_parse_int_src_ovr (
217 acpi_table_entry_header *header)
219 struct acpi_table_int_src_ovr *intsrc = NULL;
221 intsrc = (struct acpi_table_int_src_ovr*) header;
225 acpi_table_print_madt_entry(header);
227 mp_override_legacy_irq (
229 intsrc->flags.polarity,
230 intsrc->flags.trigger,
239 acpi_table_entry_header *header)
241 struct acpi_table_nmi_src *nmi_src = NULL;
243 nmi_src = (struct acpi_table_nmi_src*) header;
247 acpi_table_print_madt_entry(header);
249 /* TBD: Support nimsrc entries? */
254 #endif /*CONFIG_X86_IO_APIC*/
256 #ifdef CONFIG_ACPI_BUS
258 * "acpi_pic_sci=level" (current default)
259 * programs the PIC-mode SCI to Level Trigger.
260 * (NO-OP if the BIOS set Level Trigger already)
262 * If a PIC-mode SCI is not recogznied or gives spurious IRQ7's
263 * it may require Edge Trigger -- use "acpi_pic_sci=edge"
264 * (NO-OP if the BIOS set Edge Trigger already)
266 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
267 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
268 * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
269 * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
272 static int __initdata acpi_pic_sci_trigger; /* 0: level, 1: edge */
275 acpi_pic_sci_set_trigger(unsigned int irq)
277 unsigned char mask = 1 << (irq & 7);
278 unsigned int port = 0x4d0 + (irq >> 3);
279 unsigned char val = inb(port);
282 printk(PREFIX "IRQ%d SCI:", irq);
286 if (!acpi_pic_sci_trigger) {
287 printk(" set to Level");
288 outb(val | mask, port);
293 if (acpi_pic_sci_trigger) {
294 printk(" set to Edge");
295 outb(val | mask, port);
298 printk(" Trigger.\n");
302 acpi_pic_sci_setup(char *str)
304 while (str && *str) {
305 if (strncmp(str, "level", 5) == 0)
306 acpi_pic_sci_trigger = 0; /* force level trigger */
307 if (strncmp(str, "edge", 4) == 0)
308 acpi_pic_sci_trigger = 1; /* force edge trigger */
309 str = strchr(str, ',');
311 str += strspn(str, ", \t");
316 __setup("acpi_pic_sci=", acpi_pic_sci_setup);
318 #endif /* CONFIG_ACPI_BUS */
320 #ifdef CONFIG_X86_IO_APIC
321 int acpi_irq_to_vector(u32 irq)
323 if (use_pci_vector() && !platform_legacy_irq(irq))
324 irq = IO_APIC_VECTOR(irq);
329 static unsigned long __init
332 unsigned long length)
334 unsigned long offset = 0;
335 unsigned long sig_len = sizeof("RSD PTR ") - 1;
338 * Scan all 16-byte boundaries of the physical memory region for the
341 for (offset = 0; offset < length; offset += 16) {
342 if (strncmp((char *) (start + offset), "RSD PTR ", sig_len))
344 return (start + offset);
350 #ifdef CONFIG_HPET_TIMER
351 extern unsigned long hpet_address;
353 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
355 struct acpi_table_hpet *hpet_tbl;
360 hpet_tbl = (struct acpi_table_hpet *) __acpi_map_table(phys, size);
362 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
366 if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
367 printk(KERN_WARNING PREFIX "HPET timers must be located in "
372 hpet_address = hpet_tbl->addr.addrl;
373 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", hpet_tbl->id,
379 /* detect the location of the ACPI PM Timer */
380 #ifdef CONFIG_X86_PM_TIMER
381 extern u32 pmtmr_ioport;
383 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
385 struct fadt_descriptor_rev2 *fadt =0;
387 fadt = (struct fadt_descriptor_rev2*) __acpi_map_table(phys,size);
389 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
393 if (fadt->revision >= FADT2_REVISION_ID) {
395 if (fadt->xpm_tmr_blk.address_space_id != ACPI_ADR_SPACE_SYSTEM_IO)
398 pmtmr_ioport = fadt->xpm_tmr_blk.address;
401 pmtmr_ioport = fadt->V1_pm_tmr_blk;
404 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", pmtmr_ioport);
411 acpi_find_rsdp (void)
413 unsigned long rsdp_phys = 0;
417 return __pa(efi.acpi20);
419 return __pa(efi.acpi);
422 * Scan memory looking for the RSDP signature. First search EBDA (low
423 * memory) paragraphs and then search upper memory (E0000-FFFFF).
425 rsdp_phys = acpi_scan_rsdp (0, 0x400);
427 rsdp_phys = acpi_scan_rsdp (0xE0000, 0xFFFFF);
434 * called from setup_arch(), always.
435 * 1. maps ACPI tables for later use
436 * 2. enumerates lapics
437 * 3. enumerates io-apics
440 * acpi_lapic = 1 if LAPIC found
441 * acpi_ioapic = 1 if IOAPIC found
442 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
443 * if acpi_blacklisted() acpi_disabled = 1;
447 * return value: (currently ignored)
453 acpi_boot_init (void)
457 if (acpi_disabled && !acpi_ht)
461 * The default interrupt routing model is PIC (8259). This gets
462 * overriden if IOAPICs are enumerated (below).
464 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
467 * Initialize the ACPI boot-time table parser.
469 result = acpi_table_init();
475 result = acpi_blacklisted();
477 printk(KERN_WARNING PREFIX "BIOS listed in blacklist, disabling ACPI support\n");
482 #ifdef CONFIG_X86_PM_TIMER
483 acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
486 #ifdef CONFIG_X86_LOCAL_APIC
491 * Parse the Multiple APIC Description Table (MADT), if exists.
492 * Note that this table provides platform SMP configuration
493 * information -- the successor to MPS tables.
496 result = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
500 else if (result < 0) {
501 printk(KERN_ERR PREFIX "Error parsing MADT\n");
505 printk(KERN_WARNING PREFIX "Multiple MADT tables exist\n");
510 * Note that the LAPIC address is obtained from the MADT (32-bit value)
511 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
514 result = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0);
516 printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
520 mp_register_lapic_address(acpi_lapic_addr);
522 result = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
525 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
526 /* TBD: Cleanup to allow fallback to MPS */
529 else if (result < 0) {
530 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
531 /* TBD: Cleanup to allow fallback to MPS */
535 result = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
537 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
538 /* TBD: Cleanup to allow fallback to MPS */
544 #endif /*CONFIG_X86_LOCAL_APIC*/
546 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
554 * ACPI interpreter is required to complete interrupt setup,
555 * so if it is off, don't enumerate the io-apics with ACPI.
556 * If MPS is present, it will handle them,
557 * otherwise the system will stay in PIC mode
559 if (acpi_disabled || acpi_noirq) {
564 * if "noapic" boot option, don't look for IO-APICs
566 if (ioapic_setup_disabled()) {
567 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
568 "due to 'noapic' option.\n");
572 result = acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic, MAX_IO_APICS);
574 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
577 else if (result < 0) {
578 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
582 /* Build a default routing table for legacy (ISA) interrupts. */
583 mp_config_acpi_legacy_irqs();
585 result = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, NR_IRQ_VECTORS);
587 printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
588 /* TBD: Cleanup to allow fallback to MPS */
592 result = acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, NR_IRQ_VECTORS);
594 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
595 /* TBD: Cleanup to allow fallback to MPS */
599 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
601 acpi_irq_balance_set(NULL);
605 #endif /* CONFIG_X86_IO_APIC && CONFIG_ACPI_INTERPRETER */
607 #ifdef CONFIG_X86_LOCAL_APIC
608 if (acpi_lapic && acpi_ioapic) {
609 smp_found_config = 1;
610 clustered_apic_check();
614 #ifdef CONFIG_HPET_TIMER
615 acpi_table_parse(ACPI_HPET, acpi_parse_hpet);