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911 lines
22 KiB
911 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* acpi.c - Architecture-Specific Low-Level ACPI Support |
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* |
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* Copyright (C) 1999 VA Linux Systems |
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* Copyright (C) 1999,2000 Walt Drummond <[email protected]> |
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* Copyright (C) 2000, 2002-2003 Hewlett-Packard Co. |
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* David Mosberger-Tang <[email protected]> |
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* Copyright (C) 2000 Intel Corp. |
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* Copyright (C) 2000,2001 J.I. Lee <[email protected]> |
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* Copyright (C) 2001 Paul Diefenbaugh <[email protected]> |
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* Copyright (C) 2001 Jenna Hall <[email protected]> |
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* Copyright (C) 2001 Takayoshi Kochi <[email protected]> |
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* Copyright (C) 2002 Erich Focht <[email protected]> |
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* Copyright (C) 2004 Ashok Raj <[email protected]> |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/sched.h> |
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#include <linux/smp.h> |
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#include <linux/string.h> |
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#include <linux/types.h> |
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#include <linux/irq.h> |
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#include <linux/acpi.h> |
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#include <linux/efi.h> |
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#include <linux/mmzone.h> |
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#include <linux/nodemask.h> |
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#include <linux/slab.h> |
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#include <acpi/processor.h> |
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#include <asm/io.h> |
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#include <asm/iosapic.h> |
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#include <asm/page.h> |
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#include <asm/numa.h> |
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#include <asm/sal.h> |
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#include <asm/cyclone.h> |
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#define PREFIX "ACPI: " |
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int acpi_lapic; |
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unsigned int acpi_cpei_override; |
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unsigned int acpi_cpei_phys_cpuid; |
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#define ACPI_MAX_PLATFORM_INTERRUPTS 256 |
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/* Array to record platform interrupt vectors for generic interrupt routing. */ |
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int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = { |
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[0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1 |
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}; |
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enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC; |
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/* |
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* Interrupt routing API for device drivers. Provides interrupt vector for |
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* a generic platform event. Currently only CPEI is implemented. |
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*/ |
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int acpi_request_vector(u32 int_type) |
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{ |
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int vector = -1; |
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if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) { |
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/* corrected platform error interrupt */ |
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vector = platform_intr_list[int_type]; |
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} else |
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printk(KERN_ERR |
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"acpi_request_vector(): invalid interrupt type\n"); |
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return vector; |
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} |
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void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) |
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{ |
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return __va(phys); |
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} |
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void __init __acpi_unmap_table(void __iomem *map, unsigned long size) |
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{ |
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} |
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/* -------------------------------------------------------------------------- |
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Boot-time Table Parsing |
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-------------------------------------------------------------------------- */ |
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static int available_cpus __initdata; |
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struct acpi_table_madt *acpi_madt __initdata; |
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static u8 has_8259; |
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static int __init |
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acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, |
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const unsigned long end) |
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{ |
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struct acpi_madt_local_apic_override *lapic; |
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lapic = (struct acpi_madt_local_apic_override *)header; |
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if (BAD_MADT_ENTRY(lapic, end)) |
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return -EINVAL; |
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if (lapic->address) { |
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iounmap(ipi_base_addr); |
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ipi_base_addr = ioremap(lapic->address, 0); |
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} |
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return 0; |
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} |
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static int __init |
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acpi_parse_lsapic(union acpi_subtable_headers *header, const unsigned long end) |
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{ |
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struct acpi_madt_local_sapic *lsapic; |
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lsapic = (struct acpi_madt_local_sapic *)header; |
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/*Skip BAD_MADT_ENTRY check, as lsapic size could vary */ |
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if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { |
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#ifdef CONFIG_SMP |
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smp_boot_data.cpu_phys_id[available_cpus] = |
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(lsapic->id << 8) | lsapic->eid; |
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#endif |
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++available_cpus; |
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} |
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total_cpus++; |
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return 0; |
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} |
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static int __init |
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acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) |
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{ |
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struct acpi_madt_local_apic_nmi *lacpi_nmi; |
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lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header; |
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if (BAD_MADT_ENTRY(lacpi_nmi, end)) |
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return -EINVAL; |
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/* TBD: Support lapic_nmi entries */ |
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return 0; |
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} |
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static int __init |
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acpi_parse_iosapic(union acpi_subtable_headers * header, const unsigned long end) |
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{ |
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struct acpi_madt_io_sapic *iosapic; |
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iosapic = (struct acpi_madt_io_sapic *)header; |
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if (BAD_MADT_ENTRY(iosapic, end)) |
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return -EINVAL; |
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return iosapic_init(iosapic->address, iosapic->global_irq_base); |
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} |
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static unsigned int __initdata acpi_madt_rev; |
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static int __init |
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acpi_parse_plat_int_src(union acpi_subtable_headers * header, |
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const unsigned long end) |
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{ |
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struct acpi_madt_interrupt_source *plintsrc; |
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int vector; |
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plintsrc = (struct acpi_madt_interrupt_source *)header; |
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if (BAD_MADT_ENTRY(plintsrc, end)) |
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return -EINVAL; |
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/* |
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* Get vector assignment for this interrupt, set attributes, |
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* and program the IOSAPIC routing table. |
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*/ |
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vector = iosapic_register_platform_intr(plintsrc->type, |
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plintsrc->global_irq, |
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plintsrc->io_sapic_vector, |
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plintsrc->eid, |
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plintsrc->id, |
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((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) == |
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ACPI_MADT_POLARITY_ACTIVE_HIGH) ? |
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IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW, |
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((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) == |
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ACPI_MADT_TRIGGER_EDGE) ? |
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IOSAPIC_EDGE : IOSAPIC_LEVEL); |
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platform_intr_list[plintsrc->type] = vector; |
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if (acpi_madt_rev > 1) { |
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acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE; |
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} |
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/* |
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* Save the physical id, so we can check when its being removed |
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*/ |
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acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff; |
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return 0; |
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} |
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#ifdef CONFIG_HOTPLUG_CPU |
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unsigned int can_cpei_retarget(void) |
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{ |
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extern int cpe_vector; |
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extern unsigned int force_cpei_retarget; |
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/* |
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* Only if CPEI is supported and the override flag |
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* is present, otherwise return that its re-targettable |
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* if we are in polling mode. |
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*/ |
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if (cpe_vector > 0) { |
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if (acpi_cpei_override || force_cpei_retarget) |
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return 1; |
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else |
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return 0; |
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} |
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return 1; |
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} |
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unsigned int is_cpu_cpei_target(unsigned int cpu) |
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{ |
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unsigned int logical_id; |
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logical_id = cpu_logical_id(acpi_cpei_phys_cpuid); |
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if (logical_id == cpu) |
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return 1; |
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else |
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return 0; |
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} |
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void set_cpei_target_cpu(unsigned int cpu) |
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{ |
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acpi_cpei_phys_cpuid = cpu_physical_id(cpu); |
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} |
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#endif |
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unsigned int get_cpei_target_cpu(void) |
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{ |
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return acpi_cpei_phys_cpuid; |
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} |
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static int __init |
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acpi_parse_int_src_ovr(union acpi_subtable_headers * header, |
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const unsigned long end) |
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{ |
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struct acpi_madt_interrupt_override *p; |
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p = (struct acpi_madt_interrupt_override *)header; |
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if (BAD_MADT_ENTRY(p, end)) |
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return -EINVAL; |
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iosapic_override_isa_irq(p->source_irq, p->global_irq, |
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((p->inti_flags & ACPI_MADT_POLARITY_MASK) == |
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ACPI_MADT_POLARITY_ACTIVE_LOW) ? |
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IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH, |
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((p->inti_flags & ACPI_MADT_TRIGGER_MASK) == |
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ACPI_MADT_TRIGGER_LEVEL) ? |
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IOSAPIC_LEVEL : IOSAPIC_EDGE); |
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return 0; |
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} |
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static int __init |
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acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) |
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{ |
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struct acpi_madt_nmi_source *nmi_src; |
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nmi_src = (struct acpi_madt_nmi_source *)header; |
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if (BAD_MADT_ENTRY(nmi_src, end)) |
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return -EINVAL; |
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/* TBD: Support nimsrc entries */ |
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return 0; |
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} |
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static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id) |
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{ |
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if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) { |
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/* |
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* Unfortunately ITC_DRIFT is not yet part of the |
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* official SAL spec, so the ITC_DRIFT bit is not |
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* set by the BIOS on this hardware. |
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*/ |
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sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT; |
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cyclone_setup(); |
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} |
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} |
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static int __init acpi_parse_madt(struct acpi_table_header *table) |
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{ |
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acpi_madt = (struct acpi_table_madt *)table; |
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acpi_madt_rev = acpi_madt->header.revision; |
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/* remember the value for reference after free_initmem() */ |
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#ifdef CONFIG_ITANIUM |
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has_8259 = 1; /* Firmware on old Itanium systems is broken */ |
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#else |
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has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT; |
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#endif |
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iosapic_system_init(has_8259); |
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/* Get base address of IPI Message Block */ |
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if (acpi_madt->address) |
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ipi_base_addr = ioremap(acpi_madt->address, 0); |
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printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr); |
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acpi_madt_oem_check(acpi_madt->header.oem_id, |
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acpi_madt->header.oem_table_id); |
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return 0; |
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} |
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#ifdef CONFIG_ACPI_NUMA |
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#undef SLIT_DEBUG |
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#define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32) |
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static int __initdata srat_num_cpus; /* number of cpus */ |
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static u32 pxm_flag[PXM_FLAG_LEN]; |
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#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag)) |
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#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag)) |
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static struct acpi_table_slit __initdata *slit_table; |
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cpumask_t early_cpu_possible_map = CPU_MASK_NONE; |
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static int __init |
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get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa) |
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{ |
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int pxm; |
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pxm = pa->proximity_domain_lo; |
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if (acpi_srat_revision >= 2) |
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pxm += pa->proximity_domain_hi[0] << 8; |
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return pxm; |
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} |
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static int __init |
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get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma) |
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{ |
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int pxm; |
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pxm = ma->proximity_domain; |
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if (acpi_srat_revision <= 1) |
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pxm &= 0xff; |
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return pxm; |
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} |
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/* |
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* ACPI 2.0 SLIT (System Locality Information Table) |
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* http://devresource.hp.com/devresource/Docs/TechPapers/IA64/slit.pdf |
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*/ |
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void __init acpi_numa_slit_init(struct acpi_table_slit *slit) |
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{ |
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u32 len; |
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len = sizeof(struct acpi_table_header) + 8 |
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+ slit->locality_count * slit->locality_count; |
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if (slit->header.length != len) { |
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printk(KERN_ERR |
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"ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n", |
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len, slit->header.length); |
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return; |
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} |
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slit_table = slit; |
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} |
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void __init |
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acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) |
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{ |
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int pxm; |
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if (!(pa->flags & ACPI_SRAT_CPU_ENABLED)) |
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return; |
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if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) { |
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printk_once(KERN_WARNING |
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"node_cpuid[%ld] is too small, may not be able to use all cpus\n", |
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ARRAY_SIZE(node_cpuid)); |
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return; |
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} |
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pxm = get_processor_proximity_domain(pa); |
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/* record this node in proximity bitmap */ |
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pxm_bit_set(pxm); |
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node_cpuid[srat_num_cpus].phys_id = |
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(pa->apic_id << 8) | (pa->local_sapic_eid); |
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/* nid should be overridden as logical node id later */ |
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node_cpuid[srat_num_cpus].nid = pxm; |
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cpumask_set_cpu(srat_num_cpus, &early_cpu_possible_map); |
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srat_num_cpus++; |
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} |
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int __init |
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acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) |
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{ |
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unsigned long paddr, size; |
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int pxm; |
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struct node_memblk_s *p, *q, *pend; |
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pxm = get_memory_proximity_domain(ma); |
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/* fill node memory chunk structure */ |
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paddr = ma->base_address; |
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size = ma->length; |
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/* Ignore disabled entries */ |
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if (!(ma->flags & ACPI_SRAT_MEM_ENABLED)) |
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return -1; |
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if (num_node_memblks >= NR_NODE_MEMBLKS) { |
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pr_err("NUMA: too many memblk ranges\n"); |
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return -EINVAL; |
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} |
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/* record this node in proximity bitmap */ |
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pxm_bit_set(pxm); |
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/* Insertion sort based on base address */ |
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pend = &node_memblk[num_node_memblks]; |
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for (p = &node_memblk[0]; p < pend; p++) { |
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if (paddr < p->start_paddr) |
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break; |
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} |
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if (p < pend) { |
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for (q = pend - 1; q >= p; q--) |
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*(q + 1) = *q; |
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} |
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p->start_paddr = paddr; |
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p->size = size; |
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p->nid = pxm; |
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num_node_memblks++; |
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return 0; |
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} |
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void __init acpi_numa_fixup(void) |
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{ |
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int i, j, node_from, node_to; |
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/* If there's no SRAT, fix the phys_id and mark node 0 online */ |
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if (srat_num_cpus == 0) { |
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node_set_online(0); |
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node_cpuid[0].phys_id = hard_smp_processor_id(); |
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slit_distance(0, 0) = LOCAL_DISTANCE; |
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goto out; |
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} |
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/* |
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* MCD - This can probably be dropped now. No need for pxm ID to node ID |
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* mapping with sparse node numbering iff MAX_PXM_DOMAINS <= MAX_NUMNODES. |
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*/ |
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nodes_clear(node_online_map); |
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for (i = 0; i < MAX_PXM_DOMAINS; i++) { |
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if (pxm_bit_test(i)) { |
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int nid = acpi_map_pxm_to_node(i); |
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node_set_online(nid); |
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} |
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} |
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/* set logical node id in memory chunk structure */ |
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for (i = 0; i < num_node_memblks; i++) |
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node_memblk[i].nid = pxm_to_node(node_memblk[i].nid); |
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/* assign memory bank numbers for each chunk on each node */ |
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for_each_online_node(i) { |
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int bank; |
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bank = 0; |
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for (j = 0; j < num_node_memblks; j++) |
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if (node_memblk[j].nid == i) |
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node_memblk[j].bank = bank++; |
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} |
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/* set logical node id in cpu structure */ |
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for_each_possible_early_cpu(i) |
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node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid); |
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printk(KERN_INFO "Number of logical nodes in system = %d\n", |
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num_online_nodes()); |
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printk(KERN_INFO "Number of memory chunks in system = %d\n", |
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num_node_memblks); |
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if (!slit_table) { |
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for (i = 0; i < MAX_NUMNODES; i++) |
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for (j = 0; j < MAX_NUMNODES; j++) |
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slit_distance(i, j) = i == j ? |
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LOCAL_DISTANCE : REMOTE_DISTANCE; |
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goto out; |
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} |
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memset(numa_slit, -1, sizeof(numa_slit)); |
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for (i = 0; i < slit_table->locality_count; i++) { |
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if (!pxm_bit_test(i)) |
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continue; |
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node_from = pxm_to_node(i); |
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for (j = 0; j < slit_table->locality_count; j++) { |
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if (!pxm_bit_test(j)) |
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continue; |
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node_to = pxm_to_node(j); |
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slit_distance(node_from, node_to) = |
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slit_table->entry[i * slit_table->locality_count + j]; |
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} |
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} |
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#ifdef SLIT_DEBUG |
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printk("ACPI 2.0 SLIT locality table:\n"); |
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for_each_online_node(i) { |
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for_each_online_node(j) |
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printk("%03d ", node_distance(i, j)); |
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printk("\n"); |
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} |
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#endif |
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out: |
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node_possible_map = node_online_map; |
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} |
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#endif /* CONFIG_ACPI_NUMA */ |
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/* |
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* success: return IRQ number (>=0) |
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* failure: return < 0 |
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*/ |
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int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity) |
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{ |
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if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) |
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return gsi; |
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if (has_8259 && gsi < 16) |
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return isa_irq_to_vector(gsi); |
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return iosapic_register_intr(gsi, |
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(polarity == |
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ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : |
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IOSAPIC_POL_LOW, |
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(triggering == |
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ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : |
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IOSAPIC_LEVEL); |
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} |
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EXPORT_SYMBOL_GPL(acpi_register_gsi); |
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void acpi_unregister_gsi(u32 gsi) |
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{ |
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if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM) |
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return; |
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if (has_8259 && gsi < 16) |
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return; |
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iosapic_unregister_intr(gsi); |
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} |
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EXPORT_SYMBOL_GPL(acpi_unregister_gsi); |
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|
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static int __init acpi_parse_fadt(struct acpi_table_header *table) |
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{ |
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struct acpi_table_header *fadt_header; |
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struct acpi_table_fadt *fadt; |
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|
|
fadt_header = (struct acpi_table_header *)table; |
|
if (fadt_header->revision != 3) |
|
return -ENODEV; /* Only deal with ACPI 2.0 FADT */ |
|
|
|
fadt = (struct acpi_table_fadt *)fadt_header; |
|
|
|
acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE, |
|
ACPI_ACTIVE_LOW); |
|
return 0; |
|
} |
|
|
|
int __init early_acpi_boot_init(void) |
|
{ |
|
int ret; |
|
|
|
/* |
|
* do a partial walk of MADT to determine how many CPUs |
|
* we have including offline CPUs |
|
*/ |
|
if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { |
|
printk(KERN_ERR PREFIX "Can't find MADT\n"); |
|
return 0; |
|
} |
|
|
|
ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, |
|
acpi_parse_lsapic, NR_CPUS); |
|
if (ret < 1) |
|
printk(KERN_ERR PREFIX |
|
"Error parsing MADT - no LAPIC entries\n"); |
|
else |
|
acpi_lapic = 1; |
|
|
|
#ifdef CONFIG_SMP |
|
if (available_cpus == 0) { |
|
printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n"); |
|
printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id()); |
|
smp_boot_data.cpu_phys_id[available_cpus] = |
|
hard_smp_processor_id(); |
|
available_cpus = 1; /* We've got at least one of these, no? */ |
|
} |
|
smp_boot_data.cpu_count = available_cpus; |
|
#endif |
|
/* Make boot-up look pretty */ |
|
printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, |
|
total_cpus); |
|
|
|
return 0; |
|
} |
|
|
|
int __init acpi_boot_init(void) |
|
{ |
|
|
|
/* |
|
* MADT |
|
* ---- |
|
* Parse the Multiple APIC Description Table (MADT), if exists. |
|
* Note that this table provides platform SMP configuration |
|
* information -- the successor to MPS tables. |
|
*/ |
|
|
|
if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { |
|
printk(KERN_ERR PREFIX "Can't find MADT\n"); |
|
goto skip_madt; |
|
} |
|
|
|
/* Local APIC */ |
|
|
|
if (acpi_table_parse_madt |
|
(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0) |
|
printk(KERN_ERR PREFIX |
|
"Error parsing LAPIC address override entry\n"); |
|
|
|
if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0) |
|
< 0) |
|
printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); |
|
|
|
/* I/O APIC */ |
|
|
|
if (acpi_table_parse_madt |
|
(ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) { |
|
printk(KERN_ERR PREFIX |
|
"Error parsing MADT - no IOSAPIC entries\n"); |
|
} |
|
|
|
/* System-Level Interrupt Routing */ |
|
|
|
if (acpi_table_parse_madt |
|
(ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src, |
|
ACPI_MAX_PLATFORM_INTERRUPTS) < 0) |
|
printk(KERN_ERR PREFIX |
|
"Error parsing platform interrupt source entry\n"); |
|
|
|
if (acpi_table_parse_madt |
|
(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0) |
|
printk(KERN_ERR PREFIX |
|
"Error parsing interrupt source overrides entry\n"); |
|
|
|
if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0) |
|
printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); |
|
skip_madt: |
|
|
|
/* |
|
* FADT says whether a legacy keyboard controller is present. |
|
* The FADT also contains an SCI_INT line, by which the system |
|
* gets interrupts such as power and sleep buttons. If it's not |
|
* on a Legacy interrupt, it needs to be setup. |
|
*/ |
|
if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt)) |
|
printk(KERN_ERR PREFIX "Can't find FADT\n"); |
|
|
|
#ifdef CONFIG_ACPI_NUMA |
|
#ifdef CONFIG_SMP |
|
if (srat_num_cpus == 0) { |
|
int cpu, i = 1; |
|
for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++) |
|
if (smp_boot_data.cpu_phys_id[cpu] != |
|
hard_smp_processor_id()) |
|
node_cpuid[i++].phys_id = |
|
smp_boot_data.cpu_phys_id[cpu]; |
|
} |
|
#endif |
|
build_cpu_to_node_map(); |
|
#endif |
|
return 0; |
|
} |
|
|
|
int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) |
|
{ |
|
int tmp; |
|
|
|
if (has_8259 && gsi < 16) |
|
*irq = isa_irq_to_vector(gsi); |
|
else { |
|
tmp = gsi_to_irq(gsi); |
|
if (tmp == -1) |
|
return -1; |
|
*irq = tmp; |
|
} |
|
return 0; |
|
} |
|
|
|
int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) |
|
{ |
|
if (isa_irq >= 16) |
|
return -1; |
|
*gsi = isa_irq; |
|
return 0; |
|
} |
|
|
|
/* |
|
* ACPI based hotplug CPU support |
|
*/ |
|
#ifdef CONFIG_ACPI_HOTPLUG_CPU |
|
int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) |
|
{ |
|
#ifdef CONFIG_ACPI_NUMA |
|
/* |
|
* We don't have cpu-only-node hotadd. But if the system equips |
|
* SRAT table, pxm is already found and node is ready. |
|
* So, just pxm_to_nid(pxm) is OK. |
|
* This code here is for the system which doesn't have full SRAT |
|
* table for possible cpus. |
|
*/ |
|
node_cpuid[cpu].phys_id = physid; |
|
node_cpuid[cpu].nid = acpi_get_node(handle); |
|
#endif |
|
return 0; |
|
} |
|
|
|
int additional_cpus __initdata = -1; |
|
|
|
static __init int setup_additional_cpus(char *s) |
|
{ |
|
if (s) |
|
additional_cpus = simple_strtol(s, NULL, 0); |
|
|
|
return 0; |
|
} |
|
|
|
early_param("additional_cpus", setup_additional_cpus); |
|
|
|
/* |
|
* cpu_possible_mask should be static, it cannot change as CPUs |
|
* are onlined, or offlined. The reason is per-cpu data-structures |
|
* are allocated by some modules at init time, and dont expect to |
|
* do this dynamically on cpu arrival/departure. |
|
* cpu_present_mask on the other hand can change dynamically. |
|
* In case when cpu_hotplug is not compiled, then we resort to current |
|
* behaviour, which is cpu_possible == cpu_present. |
|
* - Ashok Raj |
|
* |
|
* Three ways to find out the number of additional hotplug CPUs: |
|
* - If the BIOS specified disabled CPUs in ACPI/mptables use that. |
|
* - The user can overwrite it with additional_cpus=NUM |
|
* - Otherwise don't reserve additional CPUs. |
|
*/ |
|
__init void prefill_possible_map(void) |
|
{ |
|
int i; |
|
int possible, disabled_cpus; |
|
|
|
disabled_cpus = total_cpus - available_cpus; |
|
|
|
if (additional_cpus == -1) { |
|
if (disabled_cpus > 0) |
|
additional_cpus = disabled_cpus; |
|
else |
|
additional_cpus = 0; |
|
} |
|
|
|
possible = available_cpus + additional_cpus; |
|
|
|
if (possible > nr_cpu_ids) |
|
possible = nr_cpu_ids; |
|
|
|
printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n", |
|
possible, max((possible - available_cpus), 0)); |
|
|
|
for (i = 0; i < possible; i++) |
|
set_cpu_possible(i, true); |
|
} |
|
|
|
static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) |
|
{ |
|
cpumask_t tmp_map; |
|
int cpu; |
|
|
|
cpumask_complement(&tmp_map, cpu_present_mask); |
|
cpu = cpumask_first(&tmp_map); |
|
if (cpu >= nr_cpu_ids) |
|
return -EINVAL; |
|
|
|
acpi_map_cpu2node(handle, cpu, physid); |
|
|
|
set_cpu_present(cpu, true); |
|
ia64_cpu_to_sapicid[cpu] = physid; |
|
|
|
acpi_processor_set_pdc(handle); |
|
|
|
*pcpu = cpu; |
|
return (0); |
|
} |
|
|
|
/* wrapper to silence section mismatch warning */ |
|
int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, |
|
int *pcpu) |
|
{ |
|
return _acpi_map_lsapic(handle, physid, pcpu); |
|
} |
|
EXPORT_SYMBOL(acpi_map_cpu); |
|
|
|
int acpi_unmap_cpu(int cpu) |
|
{ |
|
ia64_cpu_to_sapicid[cpu] = -1; |
|
set_cpu_present(cpu, false); |
|
|
|
#ifdef CONFIG_ACPI_NUMA |
|
/* NUMA specific cleanup's */ |
|
#endif |
|
|
|
return (0); |
|
} |
|
EXPORT_SYMBOL(acpi_unmap_cpu); |
|
#endif /* CONFIG_ACPI_HOTPLUG_CPU */ |
|
|
|
#ifdef CONFIG_ACPI_NUMA |
|
static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth, |
|
void *context, void **ret) |
|
{ |
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
|
union acpi_object *obj; |
|
struct acpi_madt_io_sapic *iosapic; |
|
unsigned int gsi_base; |
|
int node; |
|
|
|
/* Only care about objects w/ a method that returns the MADT */ |
|
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) |
|
return AE_OK; |
|
|
|
if (!buffer.length || !buffer.pointer) |
|
return AE_OK; |
|
|
|
obj = buffer.pointer; |
|
if (obj->type != ACPI_TYPE_BUFFER || |
|
obj->buffer.length < sizeof(*iosapic)) { |
|
kfree(buffer.pointer); |
|
return AE_OK; |
|
} |
|
|
|
iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer; |
|
|
|
if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) { |
|
kfree(buffer.pointer); |
|
return AE_OK; |
|
} |
|
|
|
gsi_base = iosapic->global_irq_base; |
|
|
|
kfree(buffer.pointer); |
|
|
|
/* OK, it's an IOSAPIC MADT entry; associate it with a node */ |
|
node = acpi_get_node(handle); |
|
if (node == NUMA_NO_NODE || !node_online(node) || |
|
cpumask_empty(cpumask_of_node(node))) |
|
return AE_OK; |
|
|
|
/* We know a gsi to node mapping! */ |
|
map_iosapic_to_node(gsi_base, node); |
|
return AE_OK; |
|
} |
|
|
|
static int __init |
|
acpi_map_iosapics (void) |
|
{ |
|
acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL); |
|
return 0; |
|
} |
|
|
|
fs_initcall(acpi_map_iosapics); |
|
#endif /* CONFIG_ACPI_NUMA */ |
|
|
|
int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) |
|
{ |
|
int err; |
|
|
|
if ((err = iosapic_init(phys_addr, gsi_base))) |
|
return err; |
|
|
|
#ifdef CONFIG_ACPI_NUMA |
|
acpi_map_iosapic(handle, 0, NULL, NULL); |
|
#endif /* CONFIG_ACPI_NUMA */ |
|
|
|
return 0; |
|
} |
|
|
|
EXPORT_SYMBOL(acpi_register_ioapic); |
|
|
|
int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) |
|
{ |
|
return iosapic_remove(gsi_base); |
|
} |
|
|
|
EXPORT_SYMBOL(acpi_unregister_ioapic); |
|
|
|
/* |
|
* acpi_suspend_lowlevel() - save kernel state and suspend. |
|
* |
|
* TBD when when IA64 starts to support suspend... |
|
*/ |
|
int acpi_suspend_lowlevel(void) { return 0; }
|
|
|