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/memtype.h> |
24 | #include <asm/tsc.h> |
25 | #include <asm/iommu.h> |
26 | #include <asm/mach_traps.h> |
27 | #include <asm/irqdomain.h> |
28 | #include <asm/realmode.h> |
29 | |
30 | void x86_init_noop(void) { } |
31 | void __init x86_init_uint_noop(unsigned int unused) { } |
32 | static int __init iommu_init_noop(void) { return 0; } |
33 | static void iommu_shutdown_noop(void) { } |
34 | bool __init bool_x86_init_noop(void) { return false; } |
35 | void x86_op_int_noop(int cpu) { } |
36 | int set_rtc_noop(const struct timespec64 *now) { return -EINVAL; } |
37 | void get_rtc_noop(struct timespec64 *now) { } |
38 | |
39 | static __initconst const struct of_device_id of_cmos_match[] = { |
40 | { .compatible = "motorola,mc146818" }, |
41 | {} |
42 | }; |
43 | |
44 | /* |
45 | * Allow devicetree configured systems to disable the RTC by setting the |
46 | * corresponding DT node's status property to disabled. Code is optimized |
47 | * out for CONFIG_OF=n builds. |
48 | */ |
49 | static __init void x86_wallclock_init(void) |
50 | { |
51 | struct device_node *node = of_find_matching_node(NULL, matches: of_cmos_match); |
52 | |
53 | if (node && !of_device_is_available(device: node)) { |
54 | x86_platform.get_wallclock = get_rtc_noop; |
55 | x86_platform.set_wallclock = set_rtc_noop; |
56 | } |
57 | } |
58 | |
59 | /* |
60 | * The platform setup functions are preset with the default functions |
61 | * for standard PC hardware. |
62 | */ |
63 | struct x86_init_ops x86_init __initdata = { |
64 | |
65 | .resources = { |
66 | .probe_roms = probe_roms, |
67 | .reserve_resources = reserve_standard_io_resources, |
68 | .memory_setup = e820__memory_setup_default, |
69 | }, |
70 | |
71 | .mpparse = { |
72 | .setup_ioapic_ids = x86_init_noop, |
73 | .find_smp_config = default_find_smp_config, |
74 | .get_smp_config = default_get_smp_config, |
75 | }, |
76 | |
77 | .irqs = { |
78 | .pre_vector_init = init_ISA_irqs, |
79 | .intr_init = native_init_IRQ, |
80 | .intr_mode_select = apic_intr_mode_select, |
81 | .intr_mode_init = apic_intr_mode_init, |
82 | .create_pci_msi_domain = native_create_pci_msi_domain, |
83 | }, |
84 | |
85 | .oem = { |
86 | .arch_setup = x86_init_noop, |
87 | .banner = default_banner, |
88 | }, |
89 | |
90 | .paging = { |
91 | .pagetable_init = native_pagetable_init, |
92 | }, |
93 | |
94 | .timers = { |
95 | .setup_percpu_clockev = setup_boot_APIC_clock, |
96 | .timer_init = hpet_time_init, |
97 | .wallclock_init = x86_wallclock_init, |
98 | }, |
99 | |
100 | .iommu = { |
101 | .iommu_init = iommu_init_noop, |
102 | }, |
103 | |
104 | .pci = { |
105 | .init = x86_default_pci_init, |
106 | .init_irq = x86_default_pci_init_irq, |
107 | .fixup_irqs = x86_default_pci_fixup_irqs, |
108 | }, |
109 | |
110 | .hyper = { |
111 | .init_platform = x86_init_noop, |
112 | .guest_late_init = x86_init_noop, |
113 | .x2apic_available = bool_x86_init_noop, |
114 | .msi_ext_dest_id = bool_x86_init_noop, |
115 | .init_mem_mapping = x86_init_noop, |
116 | .init_after_bootmem = x86_init_noop, |
117 | }, |
118 | |
119 | .acpi = { |
120 | .set_root_pointer = x86_default_set_root_pointer, |
121 | .get_root_pointer = x86_default_get_root_pointer, |
122 | .reduced_hw_early_init = acpi_generic_reduced_hw_init, |
123 | }, |
124 | }; |
125 | |
126 | struct x86_cpuinit_ops x86_cpuinit = { |
127 | .early_percpu_clock_init = x86_init_noop, |
128 | .setup_percpu_clockev = setup_secondary_APIC_clock, |
129 | .parallel_bringup = true, |
130 | }; |
131 | |
132 | static void default_nmi_init(void) { }; |
133 | |
134 | static bool enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool enc) { return true; } |
135 | static bool enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return true; } |
136 | static bool enc_tlb_flush_required_noop(bool enc) { return false; } |
137 | static bool enc_cache_flush_required_noop(void) { return false; } |
138 | static bool is_private_mmio_noop(u64 addr) {return false; } |
139 | |
140 | struct x86_platform_ops x86_platform __ro_after_init = { |
141 | .calibrate_cpu = native_calibrate_cpu_early, |
142 | .calibrate_tsc = native_calibrate_tsc, |
143 | .get_wallclock = mach_get_cmos_time, |
144 | .set_wallclock = mach_set_cmos_time, |
145 | .iommu_shutdown = iommu_shutdown_noop, |
146 | .is_untracked_pat_range = is_ISA_range, |
147 | .nmi_init = default_nmi_init, |
148 | .get_nmi_reason = default_get_nmi_reason, |
149 | .save_sched_clock_state = tsc_save_sched_clock_state, |
150 | .restore_sched_clock_state = tsc_restore_sched_clock_state, |
151 | .realmode_reserve = reserve_real_mode, |
152 | .realmode_init = init_real_mode, |
153 | .hyper.pin_vcpu = x86_op_int_noop, |
154 | .hyper.is_private_mmio = is_private_mmio_noop, |
155 | |
156 | .guest = { |
157 | .enc_status_change_prepare = enc_status_change_prepare_noop, |
158 | .enc_status_change_finish = enc_status_change_finish_noop, |
159 | .enc_tlb_flush_required = enc_tlb_flush_required_noop, |
160 | .enc_cache_flush_required = enc_cache_flush_required_noop, |
161 | }, |
162 | }; |
163 | |
164 | EXPORT_SYMBOL_GPL(x86_platform); |
165 | |
166 | struct x86_apic_ops x86_apic_ops __ro_after_init = { |
167 | .io_apic_read = native_io_apic_read, |
168 | .restore = native_restore_boot_irq_mode, |
169 | }; |
170 | |