apic_flat_64.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2004 James Cleverdon, IBM.
 4 *
 5 * Flat APIC subarch code.
 6 *
 7 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
 8 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
 9 * James Cleverdon.
10 */
11#include <linux/export.h>
12
13#include <asm/apic.h>
14
15#include "local.h"
16
17static u32 physflat_get_apic_id(u32 x)
18{
19	return (x >> 24) & 0xFF;
20}
21
22static int physflat_probe(void)
23{
24	return 1;
25}
26
27static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
28{
29	return 1;
30}
31
32static struct apic apic_physflat __ro_after_init = {
33
34	.name				= "physical flat",
35	.probe				= physflat_probe,
36	.acpi_madt_oem_check		= physflat_acpi_madt_oem_check,
37
38	.dest_mode_logical		= false,
39
40	.disable_esr			= 0,
41
42	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
43
44	.max_apic_id			= 0xFE,
45	.get_apic_id			= physflat_get_apic_id,
46
47	.calc_dest_apicid		= apic_default_calc_apicid,
48
49	.send_IPI			= default_send_IPI_single_phys,
50	.send_IPI_mask			= default_send_IPI_mask_sequence_phys,
51	.send_IPI_mask_allbutself	= default_send_IPI_mask_allbutself_phys,
52	.send_IPI_allbutself		= default_send_IPI_allbutself,
53	.send_IPI_all			= default_send_IPI_all,
54	.send_IPI_self			= default_send_IPI_self,
55	.nmi_to_offline_cpu		= true,
56
57	.read				= native_apic_mem_read,
58	.write				= native_apic_mem_write,
59	.eoi				= native_apic_mem_eoi,
60	.icr_read			= native_apic_icr_read,
61	.icr_write			= native_apic_icr_write,
62	.wait_icr_idle			= apic_mem_wait_icr_idle,
63	.safe_wait_icr_idle		= apic_mem_wait_icr_idle_timeout,
64};
65apic_driver(apic_physflat);
66
67struct apic *apic __ro_after_init = &apic_physflat;
68EXPORT_SYMBOL_GPL(apic);