x86_init.c 4.2 KB

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  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. #include <asm/acpi.h>
  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/memtype.h>
  23. #include <asm/tsc.h>
  24. #include <asm/iommu.h>
  25. #include <asm/mach_traps.h>
  26. #include <asm/irqdomain.h>
  27. void x86_init_noop(void) { }
  28. void __init x86_init_uint_noop(unsigned int unused) { }
  29. static int __init iommu_init_noop(void) { return 0; }
  30. static void iommu_shutdown_noop(void) { }
  31. bool __init bool_x86_init_noop(void) { return false; }
  32. void x86_op_int_noop(int cpu) { }
  33. static __init int set_rtc_noop(const struct timespec64 *now) { return -EINVAL; }
  34. static __init void get_rtc_noop(struct timespec64 *now) { }
  35. static __initconst const struct of_device_id of_cmos_match[] = {
  36. { .compatible = "motorola,mc146818" },
  37. {}
  38. };
  39. /*
  40. * Allow devicetree configured systems to disable the RTC by setting the
  41. * corresponding DT node's status property to disabled. Code is optimized
  42. * out for CONFIG_OF=n builds.
  43. */
  44. static __init void x86_wallclock_init(void)
  45. {
  46. struct device_node *node = of_find_matching_node(NULL, of_cmos_match);
  47. if (node && !of_device_is_available(node)) {
  48. x86_platform.get_wallclock = get_rtc_noop;
  49. x86_platform.set_wallclock = set_rtc_noop;
  50. }
  51. }
  52. /*
  53. * The platform setup functions are preset with the default functions
  54. * for standard PC hardware.
  55. */
  56. struct x86_init_ops x86_init __initdata = {
  57. .resources = {
  58. .probe_roms = probe_roms,
  59. .reserve_resources = reserve_standard_io_resources,
  60. .memory_setup = e820__memory_setup_default,
  61. },
  62. .mpparse = {
  63. .setup_ioapic_ids = x86_init_noop,
  64. .find_smp_config = default_find_smp_config,
  65. .get_smp_config = default_get_smp_config,
  66. },
  67. .irqs = {
  68. .pre_vector_init = init_ISA_irqs,
  69. .intr_init = native_init_IRQ,
  70. .intr_mode_select = apic_intr_mode_select,
  71. .intr_mode_init = apic_intr_mode_init,
  72. .create_pci_msi_domain = native_create_pci_msi_domain,
  73. },
  74. .oem = {
  75. .arch_setup = x86_init_noop,
  76. .banner = default_banner,
  77. },
  78. .paging = {
  79. .pagetable_init = native_pagetable_init,
  80. },
  81. .timers = {
  82. .setup_percpu_clockev = setup_boot_APIC_clock,
  83. .timer_init = hpet_time_init,
  84. .wallclock_init = x86_wallclock_init,
  85. },
  86. .iommu = {
  87. .iommu_init = iommu_init_noop,
  88. },
  89. .pci = {
  90. .init = x86_default_pci_init,
  91. .init_irq = x86_default_pci_init_irq,
  92. .fixup_irqs = x86_default_pci_fixup_irqs,
  93. },
  94. .hyper = {
  95. .init_platform = x86_init_noop,
  96. .guest_late_init = x86_init_noop,
  97. .x2apic_available = bool_x86_init_noop,
  98. .init_mem_mapping = x86_init_noop,
  99. .init_after_bootmem = x86_init_noop,
  100. },
  101. .acpi = {
  102. .set_root_pointer = x86_default_set_root_pointer,
  103. .get_root_pointer = x86_default_get_root_pointer,
  104. .reduced_hw_early_init = acpi_generic_reduced_hw_init,
  105. },
  106. };
  107. struct x86_cpuinit_ops x86_cpuinit = {
  108. .early_percpu_clock_init = x86_init_noop,
  109. .setup_percpu_clockev = setup_secondary_APIC_clock,
  110. };
  111. static void default_nmi_init(void) { };
  112. struct x86_platform_ops x86_platform __ro_after_init = {
  113. .calibrate_cpu = native_calibrate_cpu_early,
  114. .calibrate_tsc = native_calibrate_tsc,
  115. .get_wallclock = mach_get_cmos_time,
  116. .set_wallclock = mach_set_rtc_mmss,
  117. .iommu_shutdown = iommu_shutdown_noop,
  118. .is_untracked_pat_range = is_ISA_range,
  119. .nmi_init = default_nmi_init,
  120. .get_nmi_reason = default_get_nmi_reason,
  121. .save_sched_clock_state = tsc_save_sched_clock_state,
  122. .restore_sched_clock_state = tsc_restore_sched_clock_state,
  123. .hyper.pin_vcpu = x86_op_int_noop,
  124. };
  125. EXPORT_SYMBOL_GPL(x86_platform);
  126. #if defined(CONFIG_PCI_MSI)
  127. struct x86_msi_ops x86_msi __ro_after_init = {
  128. .restore_msi_irqs = default_restore_msi_irqs,
  129. };
  130. /* MSI arch specific hooks */
  131. void arch_restore_msi_irqs(struct pci_dev *dev)
  132. {
  133. x86_msi.restore_msi_irqs(dev);
  134. }
  135. #endif
  136. struct x86_apic_ops x86_apic_ops __ro_after_init = {
  137. .io_apic_read = native_io_apic_read,
  138. .restore = native_restore_boot_irq_mode,
  139. };