/*
 * Copyright (C) 2009 Linutronix GmbH, Thomas Gleixner <tglx@kernel.org>
 *
 *  For licencing details see kernel-base/COPYING
 */
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/export.h>
#include <linux/pci.h>
#include <linux/acpi.h>

#include <asm/acpi.h>
#include <asm/bios_ebda.h>
#include <asm/paravirt.h>
#include <asm/pci_x86.h>
#include <asm/mpspec.h>
#include <asm/setup.h>
#include <asm/apic.h>
#include <asm/e820/api.h>
#include <asm/time.h>
#include <asm/irq.h>
#include <asm/io_apic.h>
#include <asm/hpet.h>
#include <asm/memtype.h>
#include <asm/tsc.h>
#include <asm/iommu.h>
#include <asm/mach_traps.h>
#include <asm/irqdomain.h>
#include <asm/realmode.h>

void x86_init_noop(void) { }
void __init x86_init_uint_noop(unsigned int unused) { }
static int __init iommu_init_noop(void) { return 0; }
static void iommu_shutdown_noop(void) { }
bool __init bool_x86_init_noop(void) { return false; }
void x86_op_int_noop(int cpu) { }
int set_rtc_noop(const struct timespec64 *now) { return -EINVAL; }
void get_rtc_noop(struct timespec64 *now) { }

static __initconst const struct of_device_id of_cmos_match[] = {
        { .compatible = "motorola,mc146818" },
        {}
};

/*
 * Allow devicetree configured systems to disable the RTC by setting the
 * corresponding DT node's status property to disabled. Code is optimized
 * out for CONFIG_OF=n builds.
 */
static __init void x86_wallclock_init(void)
{
        struct device_node *node = of_find_matching_node(NULL, of_cmos_match);

        if (node && !of_device_is_available(node)) {
                x86_platform.get_wallclock = get_rtc_noop;
                x86_platform.set_wallclock = set_rtc_noop;
        }
}

/*
 * The platform setup functions are preset with the default functions
 * for standard PC hardware.
 */
struct x86_init_ops x86_init __initdata = {

        .resources = {
                .probe_roms             = probe_roms,
                .reserve_resources      = reserve_standard_io_resources,
                .memory_setup           = e820__memory_setup_default,
                .dmi_setup              = dmi_setup,
        },

        .mpparse = {
                .setup_ioapic_ids       = x86_init_noop,
                .find_mptable           = mpparse_find_mptable,
                .early_parse_smp_cfg    = mpparse_parse_early_smp_config,
                .parse_smp_cfg          = mpparse_parse_smp_config,
        },

        .irqs = {
                .pre_vector_init        = init_ISA_irqs,
                .intr_init              = native_init_IRQ,
                .intr_mode_select       = apic_intr_mode_select,
                .intr_mode_init         = apic_intr_mode_init,
                .create_pci_msi_domain  = native_create_pci_msi_domain,
        },

        .oem = {
                .arch_setup             = x86_init_noop,
                .banner                 = default_banner,
        },

        .paging = {
                .pagetable_init         = native_pagetable_init,
        },

        .timers = {
                .setup_percpu_clockev   = setup_boot_APIC_clock,
                .timer_init             = hpet_time_init,
                .wallclock_init         = x86_wallclock_init,
        },

        .iommu = {
                .iommu_init             = iommu_init_noop,
        },

        .pci = {
                .init                   = x86_default_pci_init,
                .init_irq               = x86_default_pci_init_irq,
                .fixup_irqs             = x86_default_pci_fixup_irqs,
        },

        .hyper = {
                .init_platform          = x86_init_noop,
                .guest_late_init        = x86_init_noop,
                .x2apic_available       = bool_x86_init_noop,
                .msi_ext_dest_id        = bool_x86_init_noop,
                .init_mem_mapping       = x86_init_noop,
                .init_after_bootmem     = x86_init_noop,
        },

        .acpi = {
                .set_root_pointer       = x86_default_set_root_pointer,
                .get_root_pointer       = x86_default_get_root_pointer,
                .reduced_hw_early_init  = acpi_generic_reduced_hw_init,
        },
};

struct x86_cpuinit_ops x86_cpuinit = {
        .early_percpu_clock_init        = x86_init_noop,
        .setup_percpu_clockev           = setup_secondary_APIC_clock,
        .parallel_bringup               = true,
};

static void default_nmi_init(void) { };

static int enc_status_change_prepare_noop(unsigned long vaddr, int npages, bool enc) { return 0; }
static int enc_status_change_finish_noop(unsigned long vaddr, int npages, bool enc) { return 0; }
static bool enc_tlb_flush_required_noop(bool enc) { return false; }
static bool enc_cache_flush_required_noop(void) { return false; }
static void enc_kexec_begin_noop(void) {}
static void enc_kexec_finish_noop(void) {}
static bool is_private_mmio_noop(u64 addr) {return false; }

struct x86_platform_ops x86_platform __ro_after_init = {
        .calibrate_cpu                  = native_calibrate_cpu_early,
        .calibrate_tsc                  = native_calibrate_tsc,
        .get_wallclock                  = mach_get_cmos_time,
        .set_wallclock                  = mach_set_cmos_time,
        .iommu_shutdown                 = iommu_shutdown_noop,
        .is_untracked_pat_range         = is_ISA_range,
        .nmi_init                       = default_nmi_init,
        .get_nmi_reason                 = default_get_nmi_reason,
        .save_sched_clock_state         = tsc_save_sched_clock_state,
        .restore_sched_clock_state      = tsc_restore_sched_clock_state,
        .realmode_reserve               = reserve_real_mode,
        .realmode_init                  = init_real_mode,
        .hyper.pin_vcpu                 = x86_op_int_noop,
        .hyper.is_private_mmio          = is_private_mmio_noop,

        .guest = {
                .enc_status_change_prepare = enc_status_change_prepare_noop,
                .enc_status_change_finish  = enc_status_change_finish_noop,
                .enc_tlb_flush_required    = enc_tlb_flush_required_noop,
                .enc_cache_flush_required  = enc_cache_flush_required_noop,
                .enc_kexec_begin           = enc_kexec_begin_noop,
                .enc_kexec_finish          = enc_kexec_finish_noop,
        },
};

EXPORT_SYMBOL_GPL(x86_platform);

struct x86_apic_ops x86_apic_ops __ro_after_init = {
        .io_apic_read   = native_io_apic_read,
        .restore        = native_restore_boot_irq_mode,
};