arch/x86/kernel/x86_init.c

   1 /*
   2  * Copyright (C) 2009 Thomas Gleixner <tglx@linutronix.de>
   3  *
   4  *  For licencing details see kernel-base/COPYING
   5  */
   6 #include <linux/init.h>
   7 #include <linux/ioport.h>
   8 #include <linux/export.h>
   9 #include <linux/pci.h>
  10
  11 #include <asm/bios_ebda.h>
  12 #include <asm/paravirt.h>
  13 #include <asm/pci_x86.h>
  14 #include <asm/mpspec.h>
  15 #include <asm/setup.h>
  16 #include <asm/apic.h>
  17 #include <asm/e820/api.h>
  18 #include <asm/time.h>
  19 #include <asm/irq.h>
  20 #include <asm/io_apic.h>
  21 #include <asm/hpet.h>
  22 #include <asm/pat.h>
  23 #include <asm/tsc.h>
  24 #include <asm/iommu.h>
  25 #include <asm/mach_traps.h>
  26
  27 void x86_init_noop(void) { }
  28 void __init x86_init_uint_noop(unsigned int unused) { }
  29 int __init iommu_init_noop(void) { return 0; }
  30 void iommu_shutdown_noop(void) { }
  31
  32 /*
  33  * The platform setup functions are preset with the default functions
  34  * for standard PC hardware.
  35  */
  36 struct x86_init_ops x86_init __initdata = {
  37
  38         .resources = {
  39                 .probe_roms             = probe_roms,
  40                 .reserve_resources      = reserve_standard_io_resources,
  41                 .memory_setup           = e820__memory_setup_default,
  42         },
  43
  44         .mpparse = {
  45                 .mpc_record             = x86_init_uint_noop,
  46                 .setup_ioapic_ids       = x86_init_noop,
  47                 .mpc_apic_id            = default_mpc_apic_id,
  48                 .smp_read_mpc_oem       = default_smp_read_mpc_oem,
  49                 .mpc_oem_bus_info       = default_mpc_oem_bus_info,
  50                 .find_smp_config        = default_find_smp_config,
  51                 .get_smp_config         = default_get_smp_config,
  52         },
  53
  54         .irqs = {
  55                 .pre_vector_init        = init_ISA_irqs,
  56                 .intr_init              = native_init_IRQ,
  57                 .trap_init              = x86_init_noop,
  58         },
  59
  60         .oem = {
  61                 .arch_setup             = x86_init_noop,
  62                 .banner                 = default_banner,
  63         },
  64
  65         .paging = {
  66                 .pagetable_init         = native_pagetable_init,
  67         },
  68
  69         .timers = {
  70                 .setup_percpu_clockev   = setup_boot_APIC_clock,
  71                 .timer_init             = hpet_time_init,
  72                 .wallclock_init         = x86_init_noop,
  73         },
  74
  75         .iommu = {
  76                 .iommu_init             = iommu_init_noop,
  77         },
  78
  79         .pci = {
  80                 .init                   = x86_default_pci_init,
  81                 .init_irq               = x86_default_pci_init_irq,
  82                 .fixup_irqs             = x86_default_pci_fixup_irqs,
  83         },
  84 };
  85
  86 struct x86_cpuinit_ops x86_cpuinit = {
  87         .early_percpu_clock_init        = x86_init_noop,
  88         .setup_percpu_clockev           = setup_secondary_APIC_clock,
  89 };
  90
  91 static void default_nmi_init(void) { };
  92
  93 struct x86_platform_ops x86_platform __ro_after_init = {
  94         .calibrate_cpu                  = native_calibrate_cpu,
  95         .calibrate_tsc                  = native_calibrate_tsc,
  96         .get_wallclock                  = mach_get_cmos_time,
  97         .set_wallclock                  = mach_set_rtc_mmss,
  98         .iommu_shutdown                 = iommu_shutdown_noop,
  99         .is_untracked_pat_range         = is_ISA_range,
 100         .nmi_init                       = default_nmi_init,
 101         .get_nmi_reason                 = default_get_nmi_reason,
 102         .save_sched_clock_state         = tsc_save_sched_clock_state,
 103         .restore_sched_clock_state      = tsc_restore_sched_clock_state,
 104 };
 105
 106 EXPORT_SYMBOL_GPL(x86_platform);
 107
 108 #if defined(CONFIG_PCI_MSI)
 109 struct x86_msi_ops x86_msi __ro_after_init = {
 110         .setup_msi_irqs         = native_setup_msi_irqs,
 111         .teardown_msi_irq       = native_teardown_msi_irq,
 112         .teardown_msi_irqs      = default_teardown_msi_irqs,
 113         .restore_msi_irqs       = default_restore_msi_irqs,
 114 };
 115
 116 /* MSI arch specific hooks */
 117 int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 118 {
 119         return x86_msi.setup_msi_irqs(dev, nvec, type);
 120 }
 121
 122 void arch_teardown_msi_irqs(struct pci_dev *dev)
 123 {
 124         x86_msi.teardown_msi_irqs(dev);
 125 }
 126
 127 void arch_teardown_msi_irq(unsigned int irq)
 128 {
 129         x86_msi.teardown_msi_irq(irq);
 130 }
 131
 132 void arch_restore_msi_irqs(struct pci_dev *dev)
 133 {
 134         x86_msi.restore_msi_irqs(dev);
 135 }
 136 #endif
 137
 138 struct x86_io_apic_ops x86_io_apic_ops __ro_after_init = {
 139         .read                   = native_io_apic_read,
 140         .disable                = native_disable_io_apic,
 141 };