projects/linux·blob master · refs

180 lines · 5.2 KiB

1/*
2 * Copyright (C) 2009 Linutronix GmbH, Thomas Gleixner <[email protected]>
3 *
4 * For licencing details see kernel-base/COPYING
5 */
6#include <linux/dmi.h>
7#include <linux/init.h>
8#include <linux/ioport.h>
9#include <linux/export.h>
10#include <linux/pci.h>
11#include <linux/acpi.h>
12#include <linux/sizes.h>
13
14#include <asm/acpi.h>
15#include <asm/bios_ebda.h>
16#include <asm/paravirt.h>
17#include <asm/pci_x86.h>
18#include <asm/mpspec.h>
19#include <asm/setup.h>
20#include <asm/apic.h>
21#include <asm/e820/api.h>
22#include <asm/time.h>
23#include <asm/irq.h>
24#include <asm/io_apic.h>
25#include <asm/hpet.h>
26#include <asm/memtype.h>
27#include <asm/tsc.h>
28#include <asm/iommu.h>
29#include <asm/mach_traps.h>
30#include <asm/irqdomain.h>
31#include <asm/realmode.h>
32
33void x86_init_noop(void) { }
34void __init x86_init_uint_noop(unsigned int unused) { }
35static int __init iommu_init_noop(void) { return 0; }
36static void iommu_shutdown_noop(void) { }
37bool __init bool_x86_init_noop(void) { return false; }
38void x86_op_int_noop(int cpu) { }
39int set_rtc_noop(const struct timespec64 *now) { return -EINVAL; }
40void get_rtc_noop(struct timespec64 *now) { }
41
42static __initconst const struct of_device_id of_cmos_match[] = {
43 { .compatible = "motorola,mc146818" },
44 {}
45};
46
47/*
48 * Allow devicetree configured systems to disable the RTC by setting the
49 * corresponding DT node's status property to disabled. Code is optimized
50 * out for CONFIG_OF=n builds.
51 */
52static __init void x86_wallclock_init(void)
53{
54 struct device_node *node = of_find_matching_node(NULL, of_cmos_match);
55
56 if (node && !of_device_is_available(node)) {
57 x86_platform.get_wallclock = get_rtc_noop;
58 x86_platform.set_wallclock = set_rtc_noop;
59 }
60}
61
62/*
63 * The platform setup functions are preset with the default functions
64 * for standard PC hardware.
65 */
66struct x86_init_ops x86_init __initdata = {
67
68 .resources = {
69 .probe_roms = probe_roms,
70 .reserve_resources = reserve_standard_io_resources,
71 .memory_setup = e820__memory_setup_default,
72 .dmi_setup = dmi_setup,
73 /* Has to be under 1M so we can execute real-mode AP code. */
74 .realmode_limit = SZ_1M,
75 },
76
77 .mpparse = {
78 .setup_ioapic_ids = x86_init_noop,
79 .find_mptable = mpparse_find_mptable,
80 .early_parse_smp_cfg = mpparse_parse_early_smp_config,
81 .parse_smp_cfg = mpparse_parse_smp_config,
82 },
83
84 .irqs = {
85 .pre_vector_init = init_ISA_irqs,
86 .intr_init = native_init_IRQ,
87 .intr_mode_select = apic_intr_mode_select,
88 .intr_mode_init = apic_intr_mode_init,
89 .create_pci_msi_domain = native_create_pci_msi_domain,
90 },
91
92 .oem = {
93 .arch_setup = x86_init_noop,
94 .banner = default_banner,
95 },
96
97 .paging = {
98 .pagetable_init = native_pagetable_init,
99 },
100
101 .timers = {
102 .setup_percpu_clockev = setup_boot_APIC_clock,
103 .timer_init = hpet_time_init,
104 .wallclock_init = x86_wallclock_init,
105 },
106
107 .iommu = {
108 .iommu_init = iommu_init_noop,
109 },
110
111 .pci = {
112 .init = x86_default_pci_init,
113 .init_irq = x86_default_pci_init_irq,
114 .fixup_irqs = x86_default_pci_fixup_irqs,
115 },
116
117 .hyper = {
118 .init_platform = x86_init_noop,
119 .guest_late_init = x86_init_noop,
120 .x2apic_available = bool_x86_init_noop,
121 .msi_ext_dest_id = bool_x86_init_noop,
122 .init_mem_mapping = x86_init_noop,
123 .init_after_bootmem = x86_init_noop,
124 },
125
126 .acpi = {
127 .set_root_pointer = x86_default_set_root_pointer,
128 .get_root_pointer = x86_default_get_root_pointer,
129 .reduced_hw_early_init = acpi_generic_reduced_hw_init,
130 },
131};
132
133struct x86_cpuinit_ops x86_cpuinit = {
134 .early_percpu_clock_init = x86_init_noop,
135 .setup_percpu_clockev = setup_secondary_APIC_clock,
136 .parallel_bringup = true,
137};
138
139static void default_nmi_init(void) { };
140
141static int enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool enc) { return 0; }
142static int enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return 0; }
143static bool enc_tlb_flush_required_noop(bool enc) { return false; }
144static bool enc_cache_flush_required_noop(void) { return false; }
145static void enc_kexec_begin_noop(void) {}
146static void enc_kexec_finish_noop(void) {}
147static bool is_private_mmio_noop(u64 addr) {return false; }
148
149struct x86_platform_ops x86_platform __ro_after_init = {
150 .calibrate_cpu = native_calibrate_cpu_early,
151 .calibrate_tsc = native_calibrate_tsc,
152 .get_wallclock = mach_get_cmos_time,
153 .set_wallclock = mach_set_cmos_time,
154 .iommu_shutdown = iommu_shutdown_noop,
155 .is_untracked_pat_range = is_ISA_range,
156 .nmi_init = default_nmi_init,
157 .get_nmi_reason = default_get_nmi_reason,
158 .save_sched_clock_state = tsc_save_sched_clock_state,
159 .restore_sched_clock_state = tsc_restore_sched_clock_state,
160 .realmode_reserve = reserve_real_mode,
161 .realmode_init = init_real_mode,
162 .hyper.pin_vcpu = x86_op_int_noop,
163 .hyper.is_private_mmio = is_private_mmio_noop,
164
165 .guest = {
166 .enc_status_change_prepare = enc_status_change_prepare_noop,
167 .enc_status_change_finish = enc_status_change_finish_noop,
168 .enc_tlb_flush_required = enc_tlb_flush_required_noop,
169 .enc_cache_flush_required = enc_cache_flush_required_noop,
170 .enc_kexec_begin = enc_kexec_begin_noop,
171 .enc_kexec_finish = enc_kexec_finish_noop,
172 },
173};
174
175EXPORT_SYMBOL_GPL(x86_platform);
176
177struct x86_apic_ops x86_apic_ops __ro_after_init = {
178 .io_apic_read = native_io_apic_read,
179 .restore = native_restore_boot_irq_mode,
180};