xref: /linux/arch/x86/kernel/x86_init.c (revision a33f32244d8550da8b4a26e277ce07d5c6d158b5) 
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 
9 #include <asm/bios_ebda.h>
10 #include <asm/paravirt.h>
11 #include <asm/pci_x86.h>
12 #include <asm/mpspec.h>
13 #include <asm/setup.h>
14 #include <asm/apic.h>
15 #include <asm/e820.h>
16 #include <asm/time.h>
17 #include <asm/irq.h>
18 #include <asm/pat.h>
19 #include <asm/tsc.h>
20 #include <asm/iommu.h>
21 
22 void __cpuinit x86_init_noop(void) { }
23 void __init x86_init_uint_noop(unsigned int unused) { }
24 void __init x86_init_pgd_noop(pgd_t *unused) { }
25 int __init iommu_init_noop(void) { return 0; }
26 void iommu_shutdown_noop(void) { }
27 
28 /*
29  * The platform setup functions are preset with the default functions
30  * for standard PC hardware.
31  */
32 struct x86_init_ops x86_init __initdata = {
33 
34 	.resources = {
35 		.probe_roms		= x86_init_noop,
36 		.reserve_resources	= reserve_standard_io_resources,
37 		.memory_setup		= default_machine_specific_memory_setup,
38 	},
39 
40 	.mpparse = {
41 		.mpc_record		= x86_init_uint_noop,
42 		.setup_ioapic_ids	= x86_init_noop,
43 		.mpc_apic_id		= default_mpc_apic_id,
44 		.smp_read_mpc_oem	= default_smp_read_mpc_oem,
45 		.mpc_oem_bus_info	= default_mpc_oem_bus_info,
46 		.find_smp_config	= default_find_smp_config,
47 		.get_smp_config		= default_get_smp_config,
48 	},
49 
50 	.irqs = {
51 		.pre_vector_init	= init_ISA_irqs,
52 		.intr_init		= native_init_IRQ,
53 		.trap_init		= x86_init_noop,
54 	},
55 
56 	.oem = {
57 		.arch_setup		= x86_init_noop,
58 		.banner			= default_banner,
59 	},
60 
61 	.paging = {
62 		.pagetable_setup_start	= native_pagetable_setup_start,
63 		.pagetable_setup_done	= native_pagetable_setup_done,
64 	},
65 
66 	.timers = {
67 		.setup_percpu_clockev	= setup_boot_APIC_clock,
68 		.tsc_pre_init		= x86_init_noop,
69 		.timer_init		= hpet_time_init,
70 	},
71 
72 	.iommu = {
73 		.iommu_init		= iommu_init_noop,
74 	},
75 
76 	.pci = {
77 		.init			= x86_default_pci_init,
78 		.init_irq		= x86_default_pci_init_irq,
79 		.fixup_irqs		= x86_default_pci_fixup_irqs,
80 	},
81 };
82 
83 struct x86_cpuinit_ops x86_cpuinit __cpuinitdata = {
84 	.setup_percpu_clockev		= setup_secondary_APIC_clock,
85 };
86 
87 static void default_nmi_init(void) { };
88 
89 struct x86_platform_ops x86_platform = {
90 	.calibrate_tsc			= native_calibrate_tsc,
91 	.get_wallclock			= mach_get_cmos_time,
92 	.set_wallclock			= mach_set_rtc_mmss,
93 	.iommu_shutdown			= iommu_shutdown_noop,
94 	.is_untracked_pat_range		= is_ISA_range,
95 	.nmi_init			= default_nmi_init
96 };
97