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/acpi.h>
  12 #include <asm/bios_ebda.h>
  13 #include <asm/paravirt.h>
  14 #include <asm/pci_x86.h>
  15 #include <asm/mpspec.h>
  16 #include <asm/setup.h>
  17 #include <asm/apic.h>
  18 #include <asm/e820/api.h>
  19 #include <asm/time.h>
  20 #include <asm/irq.h>
  21 #include <asm/io_apic.h>
  22 #include <asm/hpet.h>
  23 #include <asm/pat.h>
  24 #include <asm/tsc.h>
  25 #include <asm/iommu.h>
  26 #include <asm/mach_traps.h>
  27
  28 void x86_init_noop(void) { }
  29 void __init x86_init_uint_noop(unsigned int unused) { }
  30 static int __init iommu_init_noop(void) { return 0; }
  31 static void iommu_shutdown_noop(void) { }
  32 static bool __init bool_x86_init_noop(void) { return false; }
  33 static void x86_op_int_noop(int cpu) { }
  34 static u64 u64_x86_init_noop(void) { return 0; }
  35
  36 /*
  37  * The platform setup functions are preset with the default functions
  38  * for standard PC hardware.
  39  */
  40 struct x86_init_ops x86_init __initdata = {
  41
  42         .resources = {
  43                 .probe_roms             = probe_roms,
  44                 .reserve_resources      = reserve_standard_io_resources,
  45                 .memory_setup           = e820__memory_setup_default,
  46         },
  47
  48         .mpparse = {
  49                 .mpc_record             = x86_init_uint_noop,
  50                 .setup_ioapic_ids       = x86_init_noop,
  51                 .mpc_apic_id            = default_mpc_apic_id,
  52                 .smp_read_mpc_oem       = default_smp_read_mpc_oem,
  53                 .mpc_oem_bus_info       = default_mpc_oem_bus_info,
  54                 .find_smp_config        = default_find_smp_config,
  55                 .get_smp_config         = default_get_smp_config,
  56         },
  57
  58         .irqs = {
  59                 .pre_vector_init        = init_ISA_irqs,
  60                 .intr_init              = native_init_IRQ,
  61                 .trap_init              = x86_init_noop,
  62                 .intr_mode_init         = apic_intr_mode_init
  63         },
  64
  65         .oem = {
  66                 .arch_setup             = x86_init_noop,
  67                 .banner                 = default_banner,
  68         },
  69
  70         .paging = {
  71                 .pagetable_init         = native_pagetable_init,
  72         },
  73
  74         .timers = {
  75                 .setup_percpu_clockev   = setup_boot_APIC_clock,
  76                 .timer_init             = hpet_time_init,
  77                 .wallclock_init         = x86_init_noop,
  78         },
  79
  80         .iommu = {
  81                 .iommu_init             = iommu_init_noop,
  82         },
  83
  84         .pci = {
  85                 .init                   = x86_default_pci_init,
  86                 .init_irq               = x86_default_pci_init_irq,
  87                 .fixup_irqs             = x86_default_pci_fixup_irqs,
  88         },
  89
  90         .hyper = {
  91                 .init_platform          = x86_init_noop,
  92                 .guest_late_init        = x86_init_noop,
  93                 .x2apic_available       = bool_x86_init_noop,
  94                 .init_mem_mapping       = x86_init_noop,
  95                 .init_after_bootmem     = x86_init_noop,
  96         },
  97
  98         .acpi = {
  99                 .get_root_pointer       = u64_x86_init_noop,
 100                 .reduced_hw_early_init  = acpi_generic_reduced_hw_init,
 101         },
 102 };
 103
 104 struct x86_cpuinit_ops x86_cpuinit = {
 105         .early_percpu_clock_init        = x86_init_noop,
 106         .setup_percpu_clockev           = setup_secondary_APIC_clock,
 107 };
 108
 109 static void default_nmi_init(void) { };
 110
 111 struct x86_platform_ops x86_platform __ro_after_init = {
 112         .calibrate_cpu                  = native_calibrate_cpu,
 113         .calibrate_tsc                  = native_calibrate_tsc,
 114         .get_wallclock                  = mach_get_cmos_time,
 115         .set_wallclock                  = mach_set_rtc_mmss,
 116         .iommu_shutdown                 = iommu_shutdown_noop,
 117         .is_untracked_pat_range         = is_ISA_range,
 118         .nmi_init                       = default_nmi_init,
 119         .get_nmi_reason                 = default_get_nmi_reason,
 120         .save_sched_clock_state         = tsc_save_sched_clock_state,
 121         .restore_sched_clock_state      = tsc_restore_sched_clock_state,
 122         .hyper.pin_vcpu                 = x86_op_int_noop,
 123 };
 124
 125 EXPORT_SYMBOL_GPL(x86_platform);
 126
 127 #if defined(CONFIG_PCI_MSI)
 128 struct x86_msi_ops x86_msi __ro_after_init = {
 129         .setup_msi_irqs         = native_setup_msi_irqs,
 130         .teardown_msi_irq       = native_teardown_msi_irq,
 131         .teardown_msi_irqs      = default_teardown_msi_irqs,
 132         .restore_msi_irqs       = default_restore_msi_irqs,
 133 };
 134
 135 /* MSI arch specific hooks */
 136 int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 137 {
 138         return x86_msi.setup_msi_irqs(dev, nvec, type);
 139 }
 140
 141 void arch_teardown_msi_irqs(struct pci_dev *dev)
 142 {
 143         x86_msi.teardown_msi_irqs(dev);
 144 }
 145
 146 void arch_teardown_msi_irq(unsigned int irq)
 147 {
 148         x86_msi.teardown_msi_irq(irq);
 149 }
 150
 151 void arch_restore_msi_irqs(struct pci_dev *dev)
 152 {
 153         x86_msi.restore_msi_irqs(dev);
 154 }
 155 #endif
 156
 157 struct x86_apic_ops x86_apic_ops __ro_after_init = {
 158         .io_apic_read   = native_io_apic_read,
 159         .restore        = native_restore_boot_irq_mode,
 160 };