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Diffstat (limited to 'arch/x86/kernel/acpi/boot.c')
| -rw-r--r-- | arch/x86/kernel/acpi/boot.c | 1762 |
1 files changed, 1762 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c new file mode 100644 index 000000000..bde7a2dc5 --- /dev/null +++ b/arch/x86/kernel/acpi/boot.c @@ -0,0 +1,1762 @@ +/* + * boot.c - Architecture-Specific Low-Level ACPI Boot Support + * + * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> + * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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 <linux/init.h> +#include <linux/acpi.h> +#include <linux/acpi_pmtmr.h> +#include <linux/efi.h> +#include <linux/cpumask.h> +#include <linux/module.h> +#include <linux/dmi.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/slab.h> +#include <linux/bootmem.h> +#include <linux/ioport.h> +#include <linux/pci.h> + +#include <asm/pci_x86.h> +#include <asm/pgtable.h> +#include <asm/io_apic.h> +#include <asm/apic.h> +#include <asm/io.h> +#include <asm/mpspec.h> +#include <asm/smp.h> +#include <asm/i8259.h> + +#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ +static int __initdata acpi_force = 0; +int acpi_disabled; +EXPORT_SYMBOL(acpi_disabled); + +#ifdef CONFIG_X86_64 +# include <asm/proto.h> +#endif /* X86 */ + +#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; +int acpi_disable_cmcff; + +u8 acpi_sci_flags __initdata; +int acpi_sci_override_gsi __initdata; +int acpi_skip_timer_override __initdata; +int acpi_use_timer_override __initdata; +int acpi_fix_pin2_polarity __initdata; + +#ifdef CONFIG_X86_LOCAL_APIC +static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; +#endif + +/* + * Locks related to IOAPIC hotplug + * Hotplug side: + * ->device_hotplug_lock + * ->acpi_ioapic_lock + * ->ioapic_lock + * Interrupt mapping side: + * ->acpi_ioapic_lock + * ->ioapic_mutex + * ->ioapic_lock + */ +static DEFINE_MUTEX(acpi_ioapic_lock); + +/* -------------------------------------------------------------------------- + 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 +}; + +#define ACPI_INVALID_GSI INT_MIN + +/* + * This is just a simple wrapper around early_ioremap(), + * with sanity checks for phys == 0 and size == 0. + */ +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; +} + +/** + * acpi_register_lapic - register a local apic and generates a logic cpu number + * @id: local apic id to register + * @enabled: this cpu is enabled or not + * + * Returns the logic cpu number which maps to the local apic + */ +static int acpi_register_lapic(int id, u8 enabled) +{ + unsigned int ver = 0; + + if (id >= MAX_LOCAL_APIC) { + printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); + return -EINVAL; + } + + if (!enabled) { + ++disabled_cpus; + return -EINVAL; + } + + if (boot_cpu_physical_apicid != -1U) + ver = apic_version[boot_cpu_physical_apicid]; + + return 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; + int apic_id; + u8 enabled; + + processor = (struct acpi_madt_local_x2apic *)header; + + if (BAD_MADT_ENTRY(processor, end)) + return -EINVAL; + + acpi_table_print_madt_entry(header); + + apic_id = processor->local_apic_id; + enabled = processor->lapic_flags & ACPI_MADT_ENABLED; +#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. + */ + if (!apic->apic_id_valid(apic_id) && enabled) + printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); + else + acpi_register_lapic(apic_id, 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 +#define MP_ISA_BUS 0 + +static 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 = mpc_ioapic_id(ioapic); /* APIC ID */ + mp_irq.dstirq = pin; /* INTIN# */ + + mp_save_irq(&mp_irq); + + /* + * Reset default identity mapping if gsi is also an legacy IRQ, + * otherwise there will be more than one entry with the same GSI + * and acpi_isa_irq_to_gsi() may give wrong result. + */ + if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) + isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; + isa_irq_to_gsi[bus_irq] = gsi; +} + +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 || !dev_is_pci(dev)) + 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 = mpc_ioapic_id(ioapic); + mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); + + mp_save_irq(&mp_irq); +#endif + return 0; +} + +static int mp_register_gsi(struct device *dev, u32 gsi, int trigger, + int polarity) +{ + int irq, node; + + if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) + return gsi; + + trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; + polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; + node = dev ? dev_to_node(dev) : NUMA_NO_NODE; + if (mp_set_gsi_attr(gsi, trigger, polarity, node)) { + pr_warn("Failed to set pin attr for GSI%d\n", gsi); + return -1; + } + + irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC); + if (irq < 0) + return irq; + + /* Don't set up the ACPI SCI because it's already set up */ + if (enable_update_mptable && acpi_gbl_FADT.sci_interrupt != gsi) + mp_config_acpi_gsi(dev, gsi, trigger, polarity); + + return irq; +} + +static void mp_unregister_gsi(u32 gsi) +{ + int irq; + + if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) + return; + + irq = mp_map_gsi_to_irq(gsi, 0); + if (irq > 0) + mp_unmap_irq(irq); +} + +static struct irq_domain_ops acpi_irqdomain_ops = { + .map = mp_irqdomain_map, + .unmap = mp_irqdomain_unmap, +}; + +static int __init +acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) +{ + struct acpi_madt_io_apic *ioapic = NULL; + struct ioapic_domain_cfg cfg = { + .type = IOAPIC_DOMAIN_DYNAMIC, + .ops = &acpi_irqdomain_ops, + }; + + ioapic = (struct acpi_madt_io_apic *)header; + + if (BAD_MADT_ENTRY(ioapic, end)) + return -EINVAL; + + acpi_table_print_madt_entry(header); + + /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ + if (ioapic->global_irq_base < nr_legacy_irqs()) + cfg.type = IOAPIC_DOMAIN_LEGACY; + + mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, + &cfg); + + 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_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 (intsrc->source_irq == 0) { + if (acpi_skip_timer_override) { + printk(PREFIX "BIOS IRQ0 override ignored.\n"); + return 0; + } + + if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity + && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { + intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; + printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); + } + } + + 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 *irqp) +{ + int rc, irq, trigger, polarity; + + if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { + *irqp = gsi; + return 0; + } + + rc = acpi_get_override_irq(gsi, &trigger, &polarity); + if (rc == 0) { + trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; + polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; + irq = acpi_register_gsi(NULL, gsi, trigger, polarity); + if (irq >= 0) { + *irqp = irq; + return 0; + } + } + + return -1; +} +EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); + +int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) +{ + if (isa_irq < nr_legacy_irqs() && + isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { + *gsi = isa_irq_to_gsi[isa_irq]; + return 0; + } + + return -1; +} + +static int acpi_register_gsi_pic(struct device *dev, u32 gsi, + int trigger, int polarity) +{ +#ifdef CONFIG_PCI + /* + * Make sure all (legacy) PCI IRQs are set as level-triggered. + */ + if (trigger == ACPI_LEVEL_SENSITIVE) + eisa_set_level_irq(gsi); +#endif + + return gsi; +} + +#ifdef CONFIG_X86_LOCAL_APIC +static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, + int trigger, int polarity) +{ + int irq = gsi; + +#ifdef CONFIG_X86_IO_APIC + mutex_lock(&acpi_ioapic_lock); + irq = mp_register_gsi(dev, gsi, trigger, polarity); + mutex_unlock(&acpi_ioapic_lock); +#endif + + return irq; +} + +static void acpi_unregister_gsi_ioapic(u32 gsi) +{ +#ifdef CONFIG_X86_IO_APIC + mutex_lock(&acpi_ioapic_lock); + mp_unregister_gsi(gsi); + mutex_unlock(&acpi_ioapic_lock); +#endif +} +#endif + +int (*__acpi_register_gsi)(struct device *dev, u32 gsi, + int trigger, int polarity) = acpi_register_gsi_pic; +void (*__acpi_unregister_gsi)(u32 gsi) = NULL; + +#ifdef CONFIG_ACPI_SLEEP +int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; +#else +int (*acpi_suspend_lowlevel)(void); +#endif + +/* + * success: return IRQ number (>=0) + * failure: return < 0 + */ +int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) +{ + return __acpi_register_gsi(dev, gsi, trigger, polarity); +} +EXPORT_SYMBOL_GPL(acpi_register_gsi); + +void acpi_unregister_gsi(u32 gsi) +{ + if (__acpi_unregister_gsi) + __acpi_unregister_gsi(gsi); +} +EXPORT_SYMBOL_GPL(acpi_unregister_gsi); + +#ifdef CONFIG_X86_LOCAL_APIC +static void __init acpi_set_irq_model_ioapic(void) +{ + acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; + __acpi_register_gsi = acpi_register_gsi_ioapic; + __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; + acpi_ioapic = 1; +} +#endif + +/* + * ACPI based hotplug support for CPU + */ +#ifdef CONFIG_ACPI_HOTPLUG_CPU +#include <acpi/processor.h> + +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) { + set_apicid_to_node(physid, nid); + numa_set_node(cpu, nid); + } +#endif +} + +static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) +{ + int cpu; + + cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); + if (cpu < 0) { + pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); + return cpu; + } + + acpi_processor_set_pdc(handle); + acpi_map_cpu2node(handle, cpu, physid); + + *pcpu = cpu; + return 0; +} + +/* wrapper to silence section mismatch warning */ +int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) +{ + return _acpi_map_lsapic(handle, physid, pcpu); +} +EXPORT_SYMBOL(acpi_map_cpu); + +int acpi_unmap_cpu(int cpu) +{ +#ifdef CONFIG_ACPI_NUMA + set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); +#endif + + per_cpu(x86_cpu_to_apicid, cpu) = -1; + set_cpu_present(cpu, false); + num_processors--; + + return (0); +} +EXPORT_SYMBOL(acpi_unmap_cpu); +#endif /* CONFIG_ACPI_HOTPLUG_CPU */ + +int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) +{ + int ret = -ENOSYS; +#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC + int ioapic_id; + u64 addr; + struct ioapic_domain_cfg cfg = { + .type = IOAPIC_DOMAIN_DYNAMIC, + .ops = &acpi_irqdomain_ops, + }; + + ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); + if (ioapic_id < 0) { + unsigned long long uid; + acpi_status status; + + status = acpi_evaluate_integer(handle, METHOD_NAME__UID, + NULL, &uid); + if (ACPI_FAILURE(status)) { + acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); + return -EINVAL; + } + ioapic_id = (int)uid; + } + + mutex_lock(&acpi_ioapic_lock); + ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); + mutex_unlock(&acpi_ioapic_lock); +#endif + + return ret; +} +EXPORT_SYMBOL(acpi_register_ioapic); + +int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) +{ + int ret = -ENOSYS; + +#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC + mutex_lock(&acpi_ioapic_lock); + ret = mp_unregister_ioapic(gsi_base); + mutex_unlock(&acpi_ioapic_lock); +#endif + + return ret; +} +EXPORT_SYMBOL(acpi_unregister_ioapic); + +/** + * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base + * has been registered + * @handle: ACPI handle of the IOAPIC deivce + * @gsi_base: GSI base associated with the IOAPIC + * + * Assume caller holds some type of lock to serialize acpi_ioapic_registered() + * with acpi_register_ioapic()/acpi_unregister_ioapic(). + */ +int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) +{ + int ret = 0; + +#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC + mutex_lock(&acpi_ioapic_lock); + ret = mp_ioapic_registered(gsi_base); + mutex_unlock(&acpi_ioapic_lock); +#endif + + return ret; +} + +static int __init acpi_parse_sbf(struct acpi_table_header *table) +{ + struct acpi_table_boot *sb = (struct acpi_table_boot *)table; + + sbf_port = sb->cmos_index; /* Save CMOS port */ + + return 0; +} + +#ifdef CONFIG_HPET_TIMER +#include <asm/hpet.h> + +static struct resource *hpet_res __initdata; + +static int __init acpi_parse_hpet(struct acpi_table_header *table) +{ + struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; + + 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 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; + } + + 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; + } + + register_lapic_address(acpi_lapic_addr); + + count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, + acpi_parse_sapic, MAX_LOCAL_APIC); + + if (!count) { + x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, + acpi_parse_x2apic, MAX_LOCAL_APIC); + count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, + acpi_parse_lapic, MAX_LOCAL_APIC); + } + 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 +static void __init mp_config_acpi_legacy_irqs(void) +{ + int i; + struct mpc_intsrc mp_irq; + +#ifdef 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); + + /* + * Use the default configuration for the IRQs 0-15. Unless + * overridden by (MADT) interrupt source override entries. + */ + for (i = 0; i < nr_legacy_irqs(); 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 = mpc_ioapic_id(ioapic); + + 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; + + mp_save_irq(&mp_irq); + } +} + +/* + * 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 + */ + mutex_lock(&acpi_ioapic_lock); + error = acpi_parse_madt_ioapic_entries(); + mutex_unlock(&acpi_ioapic_lock); + if (!error) { + acpi_set_irq_model_ioapic(); + + 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 override + */ +static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) +{ + if (!acpi_skip_timer_override) { + pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", + d->ident); + acpi_skip_timer_override = 1; + } + return 0; +} + +/* + * ACPI offers an alternative platform interface model that removes + * ACPI hardware requirements for platforms that do not implement + * the PC Architecture. + * + * We initialize the Hardware-reduced ACPI model here: + */ +static void __init acpi_reduced_hw_init(void) +{ + if (acpi_gbl_reduced_hardware) { + /* + * Override x86_init functions and bypass legacy pic + * in Hardware-reduced ACPI mode + */ + x86_init.timers.timer_init = x86_init_noop; + x86_init.irqs.pre_vector_init = x86_init_noop; + legacy_pic = &null_legacy_pic; + } +} + +/* + * 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, "<A7V>"), + /* 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"), + }, + }, + /* ThinkPad Edge 11 (AMD) */ + { + .callback = dmi_ignore_irq0_timer_override, + .ident = "ThinkPad Edge", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "254523U"), + }, + }, + /* ThinkPad Edge 13 (AMD) */ + { + .callback = dmi_ignore_irq0_timer_override, + .ident = "ThinkPad Edge", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "022120U"), + }, + }, + /* ThinkPad Edge 14 (AMD) */ + { + .callback = dmi_ignore_irq0_timer_override, + .ident = "ThinkPad Edge", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "019923U"), + }, + }, + /* ThinkPad Edge 15 (AMD) */ + { + .callback = dmi_ignore_irq0_timer_override, + .ident = "ThinkPad Edge", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "030222U"), + }, + }, + {} +}; + +/* 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 + * 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"), + }, + }, + { + .callback = dmi_ignore_irq0_timer_override, + .ident = "FUJITSU SIEMENS", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), + DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), + }, + }, + {} +}; + +/* + * 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(); + + /* + * Hardware-reduced ACPI mode initialization: + */ + acpi_reduced_hw_init(); + + 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_gbl_do_not_use_xsdt = TRUE; + } + /* "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; + } + /* "acpi=nocmcff" disables FF mode for corrected errors */ + else if (strcmp(arg, "nocmcff") == 0) { + acpi_disable_cmcff = 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; +} + +void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) +{ + e820_add_region(addr, size, E820_ACPI); + update_e820(); +} |