// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2004 James Cleverdon, IBM.
 *
 * Flat APIC subarch code.
 *
 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
 * James Cleverdon.
 */
#include <linux/export.h>

#include <asm/apic.h>

#include "local.h"

static u32 physflat_get_apic_id(u32 x)
{
        return (x >> 24) & 0xFF;
}

static int physflat_probe(void)
{
        return 1;
}

static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
        return 1;
}

static struct apic apic_physflat __ro_after_init = {

        .name                           = "physical flat",
        .probe                          = physflat_probe,
        .acpi_madt_oem_check            = physflat_acpi_madt_oem_check,

        .dest_mode_logical              = false,

        .disable_esr                    = 0,

        .cpu_present_to_apicid          = default_cpu_present_to_apicid,

        .max_apic_id                    = 0xFE,
        .get_apic_id                    = physflat_get_apic_id,

        .calc_dest_apicid               = apic_default_calc_apicid,

        .send_IPI                       = default_send_IPI_single_phys,
        .send_IPI_mask                  = default_send_IPI_mask_sequence_phys,
        .send_IPI_mask_allbutself       = default_send_IPI_mask_allbutself_phys,
        .send_IPI_allbutself            = default_send_IPI_allbutself,
        .send_IPI_all                   = default_send_IPI_all,
        .send_IPI_self                  = default_send_IPI_self,
        .nmi_to_offline_cpu             = true,

        .read                           = native_apic_mem_read,
        .write                          = native_apic_mem_write,
        .eoi                            = native_apic_mem_eoi,
        .icr_read                       = native_apic_icr_read,
        .icr_write                      = native_apic_icr_write,
        .wait_icr_idle                  = apic_mem_wait_icr_idle,
        .safe_wait_icr_idle             = apic_mem_wait_icr_idle_timeout,
};
apic_driver(apic_physflat);

struct apic *apic __ro_after_init = &apic_physflat;
EXPORT_SYMBOL_GPL(apic);