Merge branch 'stable/for-linus-5.13' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-microblaze.git] / 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/memtype.h>
24 #include <asm/tsc.h>
25 #include <asm/iommu.h>
26 #include <asm/mach_traps.h>
27 #include <asm/irqdomain.h>
28
29 void x86_init_noop(void) { }
30 void __init x86_init_uint_noop(unsigned int unused) { }
31 static int __init iommu_init_noop(void) { return 0; }
32 static void iommu_shutdown_noop(void) { }
33 bool __init bool_x86_init_noop(void) { return false; }
34 void x86_op_int_noop(int cpu) { }
35 static __init int set_rtc_noop(const struct timespec64 *now) { return -EINVAL; }
36 static __init void get_rtc_noop(struct timespec64 *now) { }
37
38 static __initconst const struct of_device_id of_cmos_match[] = {
39         { .compatible = "motorola,mc146818" },
40         {}
41 };
42
43 /*
44  * Allow devicetree configured systems to disable the RTC by setting the
45  * corresponding DT node's status property to disabled. Code is optimized
46  * out for CONFIG_OF=n builds.
47  */
48 static __init void x86_wallclock_init(void)
49 {
50         struct device_node *node = of_find_matching_node(NULL, of_cmos_match);
51
52         if (node && !of_device_is_available(node)) {
53                 x86_platform.get_wallclock = get_rtc_noop;
54                 x86_platform.set_wallclock = set_rtc_noop;
55         }
56 }
57
58 /*
59  * The platform setup functions are preset with the default functions
60  * for standard PC hardware.
61  */
62 struct x86_init_ops x86_init __initdata = {
63
64         .resources = {
65                 .probe_roms             = probe_roms,
66                 .reserve_resources      = reserve_standard_io_resources,
67                 .memory_setup           = e820__memory_setup_default,
68         },
69
70         .mpparse = {
71                 .setup_ioapic_ids       = x86_init_noop,
72                 .find_smp_config        = default_find_smp_config,
73                 .get_smp_config         = default_get_smp_config,
74         },
75
76         .irqs = {
77                 .pre_vector_init        = init_ISA_irqs,
78                 .intr_init              = native_init_IRQ,
79                 .intr_mode_select       = apic_intr_mode_select,
80                 .intr_mode_init         = apic_intr_mode_init,
81                 .create_pci_msi_domain  = native_create_pci_msi_domain,
82         },
83
84         .oem = {
85                 .arch_setup             = x86_init_noop,
86                 .banner                 = default_banner,
87         },
88
89         .paging = {
90                 .pagetable_init         = native_pagetable_init,
91         },
92
93         .timers = {
94                 .setup_percpu_clockev   = setup_boot_APIC_clock,
95                 .timer_init             = hpet_time_init,
96                 .wallclock_init         = x86_wallclock_init,
97         },
98
99         .iommu = {
100                 .iommu_init             = iommu_init_noop,
101         },
102
103         .pci = {
104                 .init                   = x86_default_pci_init,
105                 .init_irq               = x86_default_pci_init_irq,
106                 .fixup_irqs             = x86_default_pci_fixup_irqs,
107         },
108
109         .hyper = {
110                 .init_platform          = x86_init_noop,
111                 .guest_late_init        = x86_init_noop,
112                 .x2apic_available       = bool_x86_init_noop,
113                 .msi_ext_dest_id        = bool_x86_init_noop,
114                 .init_mem_mapping       = x86_init_noop,
115                 .init_after_bootmem     = x86_init_noop,
116         },
117
118         .acpi = {
119                 .set_root_pointer       = x86_default_set_root_pointer,
120                 .get_root_pointer       = x86_default_get_root_pointer,
121                 .reduced_hw_early_init  = acpi_generic_reduced_hw_init,
122         },
123 };
124
125 struct x86_cpuinit_ops x86_cpuinit = {
126         .early_percpu_clock_init        = x86_init_noop,
127         .setup_percpu_clockev           = setup_secondary_APIC_clock,
128 };
129
130 static void default_nmi_init(void) { };
131
132 struct x86_platform_ops x86_platform __ro_after_init = {
133         .calibrate_cpu                  = native_calibrate_cpu_early,
134         .calibrate_tsc                  = native_calibrate_tsc,
135         .get_wallclock                  = mach_get_cmos_time,
136         .set_wallclock                  = mach_set_rtc_mmss,
137         .iommu_shutdown                 = iommu_shutdown_noop,
138         .is_untracked_pat_range         = is_ISA_range,
139         .nmi_init                       = default_nmi_init,
140         .get_nmi_reason                 = default_get_nmi_reason,
141         .save_sched_clock_state         = tsc_save_sched_clock_state,
142         .restore_sched_clock_state      = tsc_restore_sched_clock_state,
143         .hyper.pin_vcpu                 = x86_op_int_noop,
144 };
145
146 EXPORT_SYMBOL_GPL(x86_platform);
147
148 #if defined(CONFIG_PCI_MSI)
149 struct x86_msi_ops x86_msi __ro_after_init = {
150         .restore_msi_irqs       = default_restore_msi_irqs,
151 };
152
153 /* MSI arch specific hooks */
154 void arch_restore_msi_irqs(struct pci_dev *dev)
155 {
156         x86_msi.restore_msi_irqs(dev);
157 }
158 #endif
159
160 struct x86_apic_ops x86_apic_ops __ro_after_init = {
161         .io_apic_read   = native_io_apic_read,
162         .restore        = native_restore_boot_irq_mode,
163 };