x86_init.c 4.7 KB

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  1. /*
  2. * Copyright (C) 2009 Thomas Gleixner <[email protected]>
  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. #include <asm/realmode.h>
  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. bool __init bool_x86_init_noop(void) { return false; }
  33. void x86_op_int_noop(int cpu) { }
  34. static int set_rtc_noop(const struct timespec64 *now) { return -EINVAL; }
  35. static void get_rtc_noop(struct timespec64 *now) { }
  36. static __initconst const struct of_device_id of_cmos_match[] = {
  37. { .compatible = "motorola,mc146818" },
  38. {}
  39. };
  40. /*
  41. * Allow devicetree configured systems to disable the RTC by setting the
  42. * corresponding DT node's status property to disabled. Code is optimized
  43. * out for CONFIG_OF=n builds.
  44. */
  45. static __init void x86_wallclock_init(void)
  46. {
  47. struct device_node *node = of_find_matching_node(NULL, of_cmos_match);
  48. if (node && !of_device_is_available(node)) {
  49. x86_platform.get_wallclock = get_rtc_noop;
  50. x86_platform.set_wallclock = set_rtc_noop;
  51. }
  52. }
  53. /*
  54. * The platform setup functions are preset with the default functions
  55. * for standard PC hardware.
  56. */
  57. struct x86_init_ops x86_init __initdata = {
  58. .resources = {
  59. .probe_roms = probe_roms,
  60. .reserve_resources = reserve_standard_io_resources,
  61. .memory_setup = e820__memory_setup_default,
  62. },
  63. .mpparse = {
  64. .setup_ioapic_ids = x86_init_noop,
  65. .find_smp_config = default_find_smp_config,
  66. .get_smp_config = default_get_smp_config,
  67. },
  68. .irqs = {
  69. .pre_vector_init = init_ISA_irqs,
  70. .intr_init = native_init_IRQ,
  71. .intr_mode_select = apic_intr_mode_select,
  72. .intr_mode_init = apic_intr_mode_init,
  73. .create_pci_msi_domain = native_create_pci_msi_domain,
  74. },
  75. .oem = {
  76. .arch_setup = x86_init_noop,
  77. .banner = default_banner,
  78. },
  79. .paging = {
  80. .pagetable_init = native_pagetable_init,
  81. },
  82. .timers = {
  83. .setup_percpu_clockev = setup_boot_APIC_clock,
  84. .timer_init = hpet_time_init,
  85. .wallclock_init = x86_wallclock_init,
  86. },
  87. .iommu = {
  88. .iommu_init = iommu_init_noop,
  89. },
  90. .pci = {
  91. .init = x86_default_pci_init,
  92. .init_irq = x86_default_pci_init_irq,
  93. .fixup_irqs = x86_default_pci_fixup_irqs,
  94. },
  95. .hyper = {
  96. .init_platform = x86_init_noop,
  97. .guest_late_init = x86_init_noop,
  98. .x2apic_available = bool_x86_init_noop,
  99. .msi_ext_dest_id = bool_x86_init_noop,
  100. .init_mem_mapping = x86_init_noop,
  101. .init_after_bootmem = x86_init_noop,
  102. },
  103. .acpi = {
  104. .set_root_pointer = x86_default_set_root_pointer,
  105. .get_root_pointer = x86_default_get_root_pointer,
  106. .reduced_hw_early_init = acpi_generic_reduced_hw_init,
  107. },
  108. };
  109. struct x86_cpuinit_ops x86_cpuinit = {
  110. .early_percpu_clock_init = x86_init_noop,
  111. .setup_percpu_clockev = setup_secondary_APIC_clock,
  112. };
  113. static void default_nmi_init(void) { };
  114. static bool enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool enc) { return true; }
  115. static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return false; }
  116. static bool enc_tlb_flush_required_noop(bool enc) { return false; }
  117. static bool enc_cache_flush_required_noop(void) { return false; }
  118. struct x86_platform_ops x86_platform __ro_after_init = {
  119. .calibrate_cpu = native_calibrate_cpu_early,
  120. .calibrate_tsc = native_calibrate_tsc,
  121. .get_wallclock = mach_get_cmos_time,
  122. .set_wallclock = mach_set_cmos_time,
  123. .iommu_shutdown = iommu_shutdown_noop,
  124. .is_untracked_pat_range = is_ISA_range,
  125. .nmi_init = default_nmi_init,
  126. .get_nmi_reason = default_get_nmi_reason,
  127. .save_sched_clock_state = tsc_save_sched_clock_state,
  128. .restore_sched_clock_state = tsc_restore_sched_clock_state,
  129. .realmode_reserve = reserve_real_mode,
  130. .realmode_init = init_real_mode,
  131. .hyper.pin_vcpu = x86_op_int_noop,
  132. .guest = {
  133. .enc_status_change_prepare = enc_status_change_prepare_noop,
  134. .enc_status_change_finish = enc_status_change_finish_noop,
  135. .enc_tlb_flush_required = enc_tlb_flush_required_noop,
  136. .enc_cache_flush_required = enc_cache_flush_required_noop,
  137. },
  138. };
  139. EXPORT_SYMBOL_GPL(x86_platform);
  140. struct x86_apic_ops x86_apic_ops __ro_after_init = {
  141. .io_apic_read = native_io_apic_read,
  142. .restore = native_restore_boot_irq_mode,
  143. };