/* * boot.c - Architecture-Specific Low-Level ACPI Boot Support * * Copyright (C) 2001, 2002 Paul Diefenbaugh * Copyright (C) 2001 Jun Nakajima * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static int __initdata acpi_force = 0; u32 acpi_rsdt_forced; int acpi_disabled; EXPORT_SYMBOL(acpi_disabled); #ifdef CONFIG_X86_64 # include # include #endif /* X86 */ #define BAD_MADT_ENTRY(entry, end) ( \ (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) #define PREFIX "ACPI: " int acpi_noirq; /* skip ACPI IRQ initialization */ int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ EXPORT_SYMBOL(acpi_pci_disabled); int acpi_lapic; int acpi_ioapic; int acpi_strict; u8 acpi_sci_flags __initdata; int acpi_sci_override_gsi __initdata; int acpi_skip_timer_override __initdata; int acpi_use_timer_override __initdata; #ifdef CONFIG_X86_LOCAL_APIC static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; #endif #ifndef __HAVE_ARCH_CMPXCHG #warning ACPI uses CMPXCHG, i486 and later hardware #endif /* -------------------------------------------------------------------------- Boot-time Configuration -------------------------------------------------------------------------- */ /* * The default interrupt routing model is PIC (8259). This gets * overridden if IOAPICs are enumerated (below). */ enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; /* * ISA irqs by default are the first 16 gsis but can be * any gsi as specified by an interrupt source override. */ static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; static unsigned int gsi_to_irq(unsigned int gsi) { unsigned int irq = gsi + NR_IRQS_LEGACY; unsigned int i; for (i = 0; i < NR_IRQS_LEGACY; i++) { if (isa_irq_to_gsi[i] == gsi) { return i; } } /* Provide an identity mapping of gsi == irq * except on truly weird platforms that have * non isa irqs in the first 16 gsis. */ if (gsi >= NR_IRQS_LEGACY) irq = gsi; else irq = gsi_top + gsi; return irq; } static u32 irq_to_gsi(int irq) { unsigned int gsi; if (irq < NR_IRQS_LEGACY) gsi = isa_irq_to_gsi[irq]; else if (irq < gsi_top) gsi = irq; else if (irq < (gsi_top + NR_IRQS_LEGACY)) gsi = irq - gsi_top; else gsi = 0xffffffff; return gsi; } /* * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, * to map the target physical address. The problem is that set_fixmap() * provides a single page, and it is possible that the page is not * sufficient. * By using this area, we can map up to MAX_IO_APICS pages temporarily, * i.e. until the next __va_range() call. * * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and * count idx down while incrementing the phys address. */ char *__init __acpi_map_table(unsigned long phys, unsigned long size) { if (!phys || !size) return NULL; return early_ioremap(phys, size); } void __init __acpi_unmap_table(char *map, unsigned long size) { if (!map || !size) return; early_iounmap(map, size); } #ifdef CONFIG_X86_LOCAL_APIC static int __init acpi_parse_madt(struct acpi_table_header *table) { struct acpi_table_madt *madt = NULL; if (!cpu_has_apic) return -EINVAL; madt = (struct acpi_table_madt *)table; if (!madt) { printk(KERN_WARNING PREFIX "Unable to map MADT\n"); return -ENODEV; } if (madt->address) { acpi_lapic_addr = (u64) madt->address; printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", madt->address); } default_acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id); return 0; } static void __cpuinit acpi_register_lapic(int id, u8 enabled) { unsigned int ver = 0; if (!enabled) { ++disabled_cpus; return; } if (boot_cpu_physical_apicid != -1U) ver = apic_version[boot_cpu_physical_apicid]; generic_processor_info(id, ver); } static int __init acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) { struct acpi_madt_local_x2apic *processor = NULL; processor = (struct acpi_madt_local_x2apic *)header; if (BAD_MADT_ENTRY(processor, end)) return -EINVAL; acpi_table_print_madt_entry(header); #ifdef CONFIG_X86_X2APIC /* * We need to register disabled CPU as well to permit * counting disabled CPUs. This allows us to size * cpus_possible_map more accurately, to permit * to not preallocating memory for all NR_CPUS * when we use CPU hotplug. */ acpi_register_lapic(processor->local_apic_id, /* APIC ID */ processor->lapic_flags & ACPI_MADT_ENABLED); #else printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); #endif return 0; } static int __init acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) { struct acpi_madt_local_apic *processor = NULL; processor = (struct acpi_madt_local_apic *)header; if (BAD_MADT_ENTRY(processor, end)) return -EINVAL; acpi_table_print_madt_entry(header); /* * We need to register disabled CPU as well to permit * counting disabled CPUs. This allows us to size * cpus_possible_map more accurately, to permit * to not preallocating memory for all NR_CPUS * when we use CPU hotplug. */ acpi_register_lapic(processor->id, /* APIC ID */ processor->lapic_flags & ACPI_MADT_ENABLED); return 0; } static int __init acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) { struct acpi_madt_local_sapic *processor = NULL; processor = (struct acpi_madt_local_sapic *)header; if (BAD_MADT_ENTRY(processor, end)) return -EINVAL; acpi_table_print_madt_entry(header); acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ processor->lapic_flags & ACPI_MADT_ENABLED); return 0; } static int __init acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, const unsigned long end) { struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) return -EINVAL; acpi_lapic_addr = lapic_addr_ovr->address; return 0; } static int __init acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, const unsigned long end) { struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; if (BAD_MADT_ENTRY(x2apic_nmi, end)) return -EINVAL; acpi_table_print_madt_entry(header); if (x2apic_nmi->lint != 1) printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); return 0; } static int __init acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) { struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; if (BAD_MADT_ENTRY(lapic_nmi, end)) return -EINVAL; acpi_table_print_madt_entry(header); if (lapic_nmi->lint != 1) printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); return 0; } #endif /*CONFIG_X86_LOCAL_APIC */ #ifdef CONFIG_X86_IO_APIC static int __init acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) { struct acpi_madt_io_apic *ioapic = NULL; ioapic = (struct acpi_madt_io_apic *)header; if (BAD_MADT_ENTRY(ioapic, end)) return -EINVAL; acpi_table_print_madt_entry(header); mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base); return 0; } /* * Parse Interrupt Source Override for the ACPI SCI */ static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) { if (trigger == 0) /* compatible SCI trigger is level */ trigger = 3; if (polarity == 0) /* compatible SCI polarity is low */ polarity = 3; /* Command-line over-ride via acpi_sci= */ if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; /* * mp_config_acpi_legacy_irqs() already setup IRQs < 16 * If GSI is < 16, this will update its flags, * else it will create a new mp_irqs[] entry. */ mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); /* * stash over-ride to indicate we've been here * and for later update of acpi_gbl_FADT */ acpi_sci_override_gsi = gsi; return; } static int __init acpi_parse_int_src_ovr(struct acpi_subtable_header * header, const unsigned long end) { struct acpi_madt_interrupt_override *intsrc = NULL; intsrc = (struct acpi_madt_interrupt_override *)header; if (BAD_MADT_ENTRY(intsrc, end)) return -EINVAL; acpi_table_print_madt_entry(header); if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { acpi_sci_ioapic_setup(intsrc->source_irq, intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, intsrc->global_irq); return 0; } if (acpi_skip_timer_override && intsrc->source_irq == 0 && intsrc->global_irq == 2) { printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); return 0; } mp_override_legacy_irq(intsrc->source_irq, intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, intsrc->global_irq); return 0; } static int __init acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) { struct acpi_madt_nmi_source *nmi_src = NULL; nmi_src = (struct acpi_madt_nmi_source *)header; if (BAD_MADT_ENTRY(nmi_src, end)) return -EINVAL; acpi_table_print_madt_entry(header); /* TBD: Support nimsrc entries? */ return 0; } #endif /* CONFIG_X86_IO_APIC */ /* * acpi_pic_sci_set_trigger() * * use ELCR to set PIC-mode trigger type for SCI * * If a PIC-mode SCI is not recognized or gives spurious IRQ7's * it may require Edge Trigger -- use "acpi_sci=edge" * * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) */ void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) { unsigned int mask = 1 << irq; unsigned int old, new; /* Real old ELCR mask */ old = inb(0x4d0) | (inb(0x4d1) << 8); /* * If we use ACPI to set PCI IRQs, then we should clear ELCR * since we will set it correctly as we enable the PCI irq * routing. */ new = acpi_noirq ? old : 0; /* * Update SCI information in the ELCR, it isn't in the PCI * routing tables.. */ switch (trigger) { case 1: /* Edge - clear */ new &= ~mask; break; case 3: /* Level - set */ new |= mask; break; } if (old == new) return; printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); outb(new, 0x4d0); outb(new >> 8, 0x4d1); } int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) { *irq = gsi_to_irq(gsi); #ifdef CONFIG_X86_IO_APIC if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) setup_IO_APIC_irq_extra(gsi); #endif return 0; } int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) { if (isa_irq >= 16) return -1; *gsi = irq_to_gsi(isa_irq); return 0; } /* * success: return IRQ number (>=0) * failure: return < 0 */ int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) { unsigned int irq; unsigned int plat_gsi = gsi; #ifdef CONFIG_PCI /* * Make sure all (legacy) PCI IRQs are set as level-triggered. */ if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { if (trigger == ACPI_LEVEL_SENSITIVE) eisa_set_level_irq(gsi); } #endif #ifdef CONFIG_X86_IO_APIC if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) { plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity); } #endif irq = gsi_to_irq(plat_gsi); return irq; } /* * ACPI based hotplug support for CPU */ #ifdef CONFIG_ACPI_HOTPLUG_CPU #include static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) { #ifdef CONFIG_ACPI_NUMA int nid; nid = acpi_get_node(handle); if (nid == -1 || !node_online(nid)) return; #ifdef CONFIG_X86_64 apicid_to_node[physid] = nid; numa_set_node(cpu, nid); #else /* CONFIG_X86_32 */ apicid_2_node[physid] = nid; cpu_to_node_map[cpu] = nid; #endif #endif } static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) { struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *obj; struct acpi_madt_local_apic *lapic; cpumask_var_t tmp_map, new_map; u8 physid; int cpu; int retval = -ENOMEM; if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) return -EINVAL; if (!buffer.length || !buffer.pointer) return -EINVAL; obj = buffer.pointer; if (obj->type != ACPI_TYPE_BUFFER || obj->buffer.length < sizeof(*lapic)) { kfree(buffer.pointer); return -EINVAL; } lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { kfree(buffer.pointer); return -EINVAL; } physid = lapic->id; kfree(buffer.pointer); buffer.length = ACPI_ALLOCATE_BUFFER; buffer.pointer = NULL; if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) goto out; if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) goto free_tmp_map; cpumask_copy(tmp_map, cpu_present_mask); acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); /* * If mp_register_lapic successfully generates a new logical cpu * number, then the following will get us exactly what was mapped */ cpumask_andnot(new_map, cpu_present_mask, tmp_map); if (cpumask_empty(new_map)) { printk ("Unable to map lapic to logical cpu number\n"); retval = -EINVAL; goto free_new_map; } acpi_processor_set_pdc(handle); cpu = cpumask_first(new_map); acpi_map_cpu2node(handle, cpu, physid); *pcpu = cpu; retval = 0; free_new_map: free_cpumask_var(new_map); free_tmp_map: free_cpumask_var(tmp_map); out: return retval; } /* wrapper to silence section mismatch warning */ int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) { return _acpi_map_lsapic(handle, pcpu); } EXPORT_SYMBOL(acpi_map_lsapic); int acpi_unmap_lsapic(int cpu) { per_cpu(x86_cpu_to_apicid, cpu) = -1; set_cpu_present(cpu, false); num_processors--; return (0); } EXPORT_SYMBOL(acpi_unmap_lsapic); #endif /* CONFIG_ACPI_HOTPLUG_CPU */ int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) { /* TBD */ return -EINVAL; } EXPORT_SYMBOL(acpi_register_ioapic); int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) { /* TBD */ return -EINVAL; } EXPORT_SYMBOL(acpi_unregister_ioapic); static int __init acpi_parse_sbf(struct acpi_table_header *table) { struct acpi_table_boot *sb; sb = (struct acpi_table_boot *)table; if (!sb) { printk(KERN_WARNING PREFIX "Unable to map SBF\n"); return -ENODEV; } sbf_port = sb->cmos_index; /* Save CMOS port */ return 0; } #ifdef CONFIG_HPET_TIMER #include static struct __initdata resource *hpet_res; static int __init acpi_parse_hpet(struct acpi_table_header *table) { struct acpi_table_hpet *hpet_tbl; hpet_tbl = (struct acpi_table_hpet *)table; if (!hpet_tbl) { printk(KERN_WARNING PREFIX "Unable to map HPET\n"); return -ENODEV; } if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { printk(KERN_WARNING PREFIX "HPET timers must be located in " "memory.\n"); return -1; } hpet_address = hpet_tbl->address.address; hpet_blockid = hpet_tbl->sequence; /* * Some broken BIOSes advertise HPET at 0x0. We really do not * want to allocate a resource there. */ if (!hpet_address) { printk(KERN_WARNING PREFIX "HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); return 0; } #ifdef CONFIG_X86_64 /* * Some even more broken BIOSes advertise HPET at * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add * some noise: */ if (hpet_address == 0xfed0000000000000UL) { if (!hpet_force_user) { printk(KERN_WARNING PREFIX "HPET id: %#x " "base: 0xfed0000000000000 is bogus\n " "try hpet=force on the kernel command line to " "fix it up to 0xfed00000.\n", hpet_tbl->id); hpet_address = 0; return 0; } printk(KERN_WARNING PREFIX "HPET id: %#x base: 0xfed0000000000000 fixed up " "to 0xfed00000.\n", hpet_tbl->id); hpet_address >>= 32; } #endif printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); /* * Allocate and initialize the HPET firmware resource for adding into * the resource tree during the lateinit timeframe. */ #define HPET_RESOURCE_NAME_SIZE 9 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); hpet_res->name = (void *)&hpet_res[1]; hpet_res->flags = IORESOURCE_MEM; snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", hpet_tbl->sequence); hpet_res->start = hpet_address; hpet_res->end = hpet_address + (1 * 1024) - 1; return 0; } /* * hpet_insert_resource inserts the HPET resources used into the resource * tree. */ static __init int hpet_insert_resource(void) { if (!hpet_res) return 1; return insert_resource(&iomem_resource, hpet_res); } late_initcall(hpet_insert_resource); #else #define acpi_parse_hpet NULL #endif static int __init acpi_parse_fadt(struct acpi_table_header *table) { #ifdef CONFIG_X86_PM_TIMER /* detect the location of the ACPI PM Timer */ if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { /* FADT rev. 2 */ if (acpi_gbl_FADT.xpm_timer_block.space_id != ACPI_ADR_SPACE_SYSTEM_IO) return 0; pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; /* * "X" fields are optional extensions to the original V1.0 * fields, so we must selectively expand V1.0 fields if the * corresponding X field is zero. */ if (!pmtmr_ioport) pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; } else { /* FADT rev. 1 */ pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; } if (pmtmr_ioport) printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", pmtmr_ioport); #endif return 0; } #ifdef CONFIG_X86_LOCAL_APIC /* * Parse LAPIC entries in MADT * returns 0 on success, < 0 on error */ static void __init acpi_register_lapic_address(unsigned long address) { mp_lapic_addr = address; set_fixmap_nocache(FIX_APIC_BASE, address); if (boot_cpu_physical_apicid == -1U) { boot_cpu_physical_apicid = read_apic_id(); apic_version[boot_cpu_physical_apicid] = GET_APIC_VERSION(apic_read(APIC_LVR)); } } static int __init early_acpi_parse_madt_lapic_addr_ovr(void) { int count; if (!cpu_has_apic) return -ENODEV; /* * Note that the LAPIC address is obtained from the MADT (32-bit value) * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). */ count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0); if (count < 0) { printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n"); return count; } acpi_register_lapic_address(acpi_lapic_addr); return count; } static int __init acpi_parse_madt_lapic_entries(void) { int count; int x2count = 0; if (!cpu_has_apic) return -ENODEV; /* * Note that the LAPIC address is obtained from the MADT (32-bit value) * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). */ count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0); if (count < 0) { printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n"); return count; } acpi_register_lapic_address(acpi_lapic_addr); count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, acpi_parse_sapic, MAX_APICS); if (!count) { x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, acpi_parse_x2apic, MAX_APICS); count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic, MAX_APICS); } if (!count && !x2count) { printk(KERN_ERR PREFIX "No LAPIC entries present\n"); /* TBD: Cleanup to allow fallback to MPS */ return -ENODEV; } else if (count < 0 || x2count < 0) { printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); /* TBD: Cleanup to allow fallback to MPS */ return count; } x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, acpi_parse_x2apic_nmi, 0); count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); if (count < 0 || x2count < 0) { printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); /* TBD: Cleanup to allow fallback to MPS */ return count; } return 0; } #endif /* CONFIG_X86_LOCAL_APIC */ #ifdef CONFIG_X86_IO_APIC #define MP_ISA_BUS 0 #ifdef CONFIG_X86_ES7000 extern int es7000_plat; #endif static void assign_to_mp_irq(struct mpc_intsrc *m, struct mpc_intsrc *mp_irq) { memcpy(mp_irq, m, sizeof(struct mpc_intsrc)); } static int mp_irq_cmp(struct mpc_intsrc *mp_irq, struct mpc_intsrc *m) { return memcmp(mp_irq, m, sizeof(struct mpc_intsrc)); } static void save_mp_irq(struct mpc_intsrc *m) { int i; for (i = 0; i < mp_irq_entries; i++) { if (!mp_irq_cmp(&mp_irqs[i], m)) return; } assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); if (++mp_irq_entries == MAX_IRQ_SOURCES) panic("Max # of irq sources exceeded!!\n"); } void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) { int ioapic; int pin; struct mpc_intsrc mp_irq; /* * Convert 'gsi' to 'ioapic.pin'. */ ioapic = mp_find_ioapic(gsi); if (ioapic < 0) return; pin = mp_find_ioapic_pin(ioapic, gsi); /* * TBD: This check is for faulty timer entries, where the override * erroneously sets the trigger to level, resulting in a HUGE * increase of timer interrupts! */ if ((bus_irq == 0) && (trigger == 3)) trigger = 1; mp_irq.type = MP_INTSRC; mp_irq.irqtype = mp_INT; mp_irq.irqflag = (trigger << 2) | polarity; mp_irq.srcbus = MP_ISA_BUS; mp_irq.srcbusirq = bus_irq; /* IRQ */ mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ mp_irq.dstirq = pin; /* INTIN# */ save_mp_irq(&mp_irq); isa_irq_to_gsi[bus_irq] = gsi; } void __init mp_config_acpi_legacy_irqs(void) { int i; struct mpc_intsrc mp_irq; #if defined (CONFIG_MCA) || defined (CONFIG_EISA) /* * Fabricate the legacy ISA bus (bus #31). */ mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; #endif set_bit(MP_ISA_BUS, mp_bus_not_pci); pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); #ifdef CONFIG_X86_ES7000 /* * Older generations of ES7000 have no legacy identity mappings */ if (es7000_plat == 1) return; #endif /* * Use the default configuration for the IRQs 0-15. Unless * overridden by (MADT) interrupt source override entries. */ for (i = 0; i < 16; i++) { int ioapic, pin; unsigned int dstapic; int idx; u32 gsi; /* Locate the gsi that irq i maps to. */ if (acpi_isa_irq_to_gsi(i, &gsi)) continue; /* * Locate the IOAPIC that manages the ISA IRQ. */ ioapic = mp_find_ioapic(gsi); if (ioapic < 0) continue; pin = mp_find_ioapic_pin(ioapic, gsi); dstapic = mp_ioapics[ioapic].apicid; for (idx = 0; idx < mp_irq_entries; idx++) { struct mpc_intsrc *irq = mp_irqs + idx; /* Do we already have a mapping for this ISA IRQ? */ if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) break; /* Do we already have a mapping for this IOAPIC pin */ if (irq->dstapic == dstapic && irq->dstirq == pin) break; } if (idx != mp_irq_entries) { printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); continue; /* IRQ already used */ } mp_irq.type = MP_INTSRC; mp_irq.irqflag = 0; /* Conforming */ mp_irq.srcbus = MP_ISA_BUS; mp_irq.dstapic = dstapic; mp_irq.irqtype = mp_INT; mp_irq.srcbusirq = i; /* Identity mapped */ mp_irq.dstirq = pin; save_mp_irq(&mp_irq); } } static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, int polarity) { #ifdef CONFIG_X86_MPPARSE struct mpc_intsrc mp_irq; struct pci_dev *pdev; unsigned char number; unsigned int devfn; int ioapic; u8 pin; if (!acpi_ioapic) return 0; if (!dev) return 0; if (dev->bus != &pci_bus_type) return 0; pdev = to_pci_dev(dev); number = pdev->bus->number; devfn = pdev->devfn; pin = pdev->pin; /* print the entry should happen on mptable identically */ mp_irq.type = MP_INTSRC; mp_irq.irqtype = mp_INT; mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); mp_irq.srcbus = number; mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); ioapic = mp_find_ioapic(gsi); mp_irq.dstapic = mp_ioapics[ioapic].apicid; mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); save_mp_irq(&mp_irq); #endif return 0; } int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) { int ioapic; int ioapic_pin; struct io_apic_irq_attr irq_attr; if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) return gsi; /* Don't set up the ACPI SCI because it's already set up */ if (acpi_gbl_FADT.sci_interrupt == gsi) return gsi; ioapic = mp_find_ioapic(gsi); if (ioapic < 0) { printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); return gsi; } ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); if (ioapic_pin > MP_MAX_IOAPIC_PIN) { printk(KERN_ERR "Invalid reference to IOAPIC pin " "%d-%d\n", mp_ioapics[ioapic].apicid, ioapic_pin); return gsi; } if (enable_update_mptable) mp_config_acpi_gsi(dev, gsi, trigger, polarity); set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, polarity == ACPI_ACTIVE_HIGH ? 0 : 1); io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); return gsi; } /* * Parse IOAPIC related entries in MADT * returns 0 on success, < 0 on error */ static int __init acpi_parse_madt_ioapic_entries(void) { int count; /* * ACPI interpreter is required to complete interrupt setup, * so if it is off, don't enumerate the io-apics with ACPI. * If MPS is present, it will handle them, * otherwise the system will stay in PIC mode */ if (acpi_disabled || acpi_noirq) return -ENODEV; if (!cpu_has_apic) return -ENODEV; /* * if "noapic" boot option, don't look for IO-APICs */ if (skip_ioapic_setup) { printk(KERN_INFO PREFIX "Skipping IOAPIC probe " "due to 'noapic' option.\n"); return -ENODEV; } count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, MAX_IO_APICS); if (!count) { printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); return -ENODEV; } else if (count < 0) { printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); return count; } count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, nr_irqs); if (count < 0) { printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n"); /* TBD: Cleanup to allow fallback to MPS */ return count; } /* * If BIOS did not supply an INT_SRC_OVR for the SCI * pretend we got one so we can set the SCI flags. */ if (!acpi_sci_override_gsi) acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, acpi_gbl_FADT.sci_interrupt); /* Fill in identity legacy mappings where no override */ mp_config_acpi_legacy_irqs(); count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, nr_irqs); if (count < 0) { printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); /* TBD: Cleanup to allow fallback to MPS */ return count; } return 0; } #else static inline int acpi_parse_madt_ioapic_entries(void) { return -1; } #endif /* !CONFIG_X86_IO_APIC */ static void __init early_acpi_process_madt(void) { #ifdef CONFIG_X86_LOCAL_APIC int error; if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { /* * Parse MADT LAPIC entries */ error = early_acpi_parse_madt_lapic_addr_ovr(); if (!error) { acpi_lapic = 1; smp_found_config = 1; } if (error == -EINVAL) { /* * Dell Precision Workstation 410, 610 come here. */ printk(KERN_ERR PREFIX "Invalid BIOS MADT, disabling ACPI\n"); disable_acpi(); } } #endif } static void __init acpi_process_madt(void) { #ifdef CONFIG_X86_LOCAL_APIC int error; if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { /* * Parse MADT LAPIC entries */ error = acpi_parse_madt_lapic_entries(); if (!error) { acpi_lapic = 1; /* * Parse MADT IO-APIC entries */ error = acpi_parse_madt_ioapic_entries(); if (!error) { acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; acpi_ioapic = 1; smp_found_config = 1; } } if (error == -EINVAL) { /* * Dell Precision Workstation 410, 610 come here. */ printk(KERN_ERR PREFIX "Invalid BIOS MADT, disabling ACPI\n"); disable_acpi(); } } else { /* * ACPI found no MADT, and so ACPI wants UP PIC mode. * In the event an MPS table was found, forget it. * Boot with "acpi=off" to use MPS on such a system. */ if (smp_found_config) { printk(KERN_WARNING PREFIX "No APIC-table, disabling MPS\n"); smp_found_config = 0; } } /* * ACPI supports both logical (e.g. Hyper-Threading) and physical * processors, where MPS only supports physical. */ if (acpi_lapic && acpi_ioapic) printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " "information\n"); else if (acpi_lapic) printk(KERN_INFO "Using ACPI for processor (LAPIC) " "configuration information\n"); #endif return; } static int __init disable_acpi_irq(const struct dmi_system_id *d) { if (!acpi_force) { printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", d->ident); acpi_noirq_set(); } return 0; } static int __init disable_acpi_pci(const struct dmi_system_id *d) { if (!acpi_force) { printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", d->ident); acpi_disable_pci(); } return 0; } static int __init dmi_disable_acpi(const struct dmi_system_id *d) { if (!acpi_force) { printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); disable_acpi(); } else { printk(KERN_NOTICE "Warning: DMI blacklist says broken, but acpi forced\n"); } return 0; } /* * Force ignoring BIOS IRQ0 pin2 override */ static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) { /* * The ati_ixp4x0_rev() early PCI quirk should have set * the acpi_skip_timer_override flag already: */ if (!acpi_skip_timer_override) { WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident); acpi_skip_timer_override = 1; } return 0; } /* * If your system is blacklisted here, but you find that acpi=force * works for you, please contact linux-acpi@vger.kernel.org */ static struct dmi_system_id __initdata acpi_dmi_table[] = { /* * Boxes that need ACPI disabled */ { .callback = dmi_disable_acpi, .ident = "IBM Thinkpad", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), }, }, /* * Boxes that need ACPI PCI IRQ routing disabled */ { .callback = disable_acpi_irq, .ident = "ASUS A7V", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), DMI_MATCH(DMI_BOARD_NAME, ""), /* newer BIOS, Revision 1011, does work */ DMI_MATCH(DMI_BIOS_VERSION, "ASUS A7V ACPI BIOS Revision 1007"), }, }, { /* * Latest BIOS for IBM 600E (1.16) has bad pcinum * for LPC bridge, which is needed for the PCI * interrupt links to work. DSDT fix is in bug 5966. * 2645, 2646 model numbers are shared with 600/600E/600X */ .callback = disable_acpi_irq, .ident = "IBM Thinkpad 600 Series 2645", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), DMI_MATCH(DMI_BOARD_NAME, "2645"), }, }, { .callback = disable_acpi_irq, .ident = "IBM Thinkpad 600 Series 2646", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), DMI_MATCH(DMI_BOARD_NAME, "2646"), }, }, /* * Boxes that need ACPI PCI IRQ routing and PCI scan disabled */ { /* _BBN 0 bug */ .callback = disable_acpi_pci, .ident = "ASUS PR-DLS", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), DMI_MATCH(DMI_BIOS_VERSION, "ASUS PR-DLS ACPI BIOS Revision 1010"), DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") }, }, { .callback = disable_acpi_pci, .ident = "Acer TravelMate 36x Laptop", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Acer"), DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), }, }, {} }; /* second table for DMI checks that should run after early-quirks */ static struct dmi_system_id __initdata acpi_dmi_table_late[] = { /* * HP laptops which use a DSDT reporting as HP/SB400/10000, * which includes some code which overrides all temperature * trip points to 16C if the INTIN2 input of the I/O APIC * is enabled. This input is incorrectly designated the * ISA IRQ 0 via an interrupt source override even though * it is wired to the output of the master 8259A and INTIN0 * is not connected at all. Force ignoring BIOS IRQ0 pin2 * override in that cases. */ { .callback = dmi_ignore_irq0_timer_override, .ident = "HP nx6115 laptop", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), }, }, { .callback = dmi_ignore_irq0_timer_override, .ident = "HP NX6125 laptop", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), }, }, { .callback = dmi_ignore_irq0_timer_override, .ident = "HP NX6325 laptop", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), }, }, { .callback = dmi_ignore_irq0_timer_override, .ident = "HP 6715b laptop", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), }, }, {} }; /* * acpi_boot_table_init() and acpi_boot_init() * called from setup_arch(), always. * 1. checksums all tables * 2. enumerates lapics * 3. enumerates io-apics * * acpi_table_init() is separate to allow reading SRAT without * other side effects. * * side effects of acpi_boot_init: * acpi_lapic = 1 if LAPIC found * acpi_ioapic = 1 if IOAPIC found * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; * if acpi_blacklisted() acpi_disabled = 1; * acpi_irq_model=... * ... */ void __init acpi_boot_table_init(void) { dmi_check_system(acpi_dmi_table); /* * If acpi_disabled, bail out */ if (acpi_disabled) return; /* * Initialize the ACPI boot-time table parser. */ if (acpi_table_init()) { disable_acpi(); return; } acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); /* * blacklist may disable ACPI entirely */ if (acpi_blacklisted()) { if (acpi_force) { printk(KERN_WARNING PREFIX "acpi=force override\n"); } else { printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); disable_acpi(); return; } } } int __init early_acpi_boot_init(void) { /* * If acpi_disabled, bail out */ if (acpi_disabled) return 1; /* * Process the Multiple APIC Description Table (MADT), if present */ early_acpi_process_madt(); return 0; } int __init acpi_boot_init(void) { /* those are executed after early-quirks are executed */ dmi_check_system(acpi_dmi_table_late); /* * If acpi_disabled, bail out */ if (acpi_disabled) return 1; acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); /* * set sci_int and PM timer address */ acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); /* * Process the Multiple APIC Description Table (MADT), if present */ acpi_process_madt(); acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); if (!acpi_noirq) x86_init.pci.init = pci_acpi_init; return 0; } static int __init parse_acpi(char *arg) { if (!arg) return -EINVAL; /* "acpi=off" disables both ACPI table parsing and interpreter */ if (strcmp(arg, "off") == 0) { disable_acpi(); } /* acpi=force to over-ride black-list */ else if (strcmp(arg, "force") == 0) { acpi_force = 1; acpi_disabled = 0; } /* acpi=strict disables out-of-spec workarounds */ else if (strcmp(arg, "strict") == 0) { acpi_strict = 1; } /* acpi=rsdt use RSDT instead of XSDT */ else if (strcmp(arg, "rsdt") == 0) { acpi_rsdt_forced = 1; } /* "acpi=noirq" disables ACPI interrupt routing */ else if (strcmp(arg, "noirq") == 0) { acpi_noirq_set(); } /* "acpi=copy_dsdt" copys DSDT */ else if (strcmp(arg, "copy_dsdt") == 0) { acpi_gbl_copy_dsdt_locally = 1; } else { /* Core will printk when we return error. */ return -EINVAL; } return 0; } early_param("acpi", parse_acpi); /* FIXME: Using pci= for an ACPI parameter is a travesty. */ static int __init parse_pci(char *arg) { if (arg && strcmp(arg, "noacpi") == 0) acpi_disable_pci(); return 0; } early_param("pci", parse_pci); int __init acpi_mps_check(void) { #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) /* mptable code is not built-in*/ if (acpi_disabled || acpi_noirq) { printk(KERN_WARNING "MPS support code is not built-in.\n" "Using acpi=off or acpi=noirq or pci=noacpi " "may have problem\n"); return 1; } #endif return 0; } #ifdef CONFIG_X86_IO_APIC static int __init parse_acpi_skip_timer_override(char *arg) { acpi_skip_timer_override = 1; return 0; } early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); static int __init parse_acpi_use_timer_override(char *arg) { acpi_use_timer_override = 1; return 0; } early_param("acpi_use_timer_override", parse_acpi_use_timer_override); #endif /* CONFIG_X86_IO_APIC */ static int __init setup_acpi_sci(char *s) { if (!s) return -EINVAL; if (!strcmp(s, "edge")) acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); else if (!strcmp(s, "level")) acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); else if (!strcmp(s, "high")) acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); else if (!strcmp(s, "low")) acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); else return -EINVAL; return 0; } early_param("acpi_sci", setup_acpi_sci); int __acpi_acquire_global_lock(unsigned int *lock) { unsigned int old, new, val; do { old = *lock; new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); val = cmpxchg(lock, old, new); } while (unlikely (val != old)); return (new < 3) ? -1 : 0; } int __acpi_release_global_lock(unsigned int *lock) { unsigned int old, new, val; do { old = *lock; new = old & ~0x3; val = cmpxchg(lock, old, new); } while (unlikely (val != old)); return old & 0x1; }