1/*
 2 * Common functions shared between the various APIC flavours
 3 *
 4 * SPDX-License-Identifier: GPL-2.0
 5 */
 6#include <linux/irq.h>
 7#include <asm/apic.h>
 8
 9#include "local.h"
10
11u32 apic_default_calc_apicid(unsigned int cpu)
12{
13	return per_cpu(x86_cpu_to_apicid, cpu);
14}
15
16u32 apic_flat_calc_apicid(unsigned int cpu)
17{
18	return 1U << cpu;
19}
20
 
 
 
 
 
 
 
 
 
 
21u32 default_cpu_present_to_apicid(int mps_cpu)
22{
23	if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
24		return (int)per_cpu(x86_cpu_to_apicid, mps_cpu);
25	else
26		return BAD_APICID;
27}
28EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid);
 
 
 
 
 
29
30/*
31 * Set up the logical destination ID when the APIC operates in logical
32 * destination mode.
33 */
34void default_init_apic_ldr(void)
35{
36	unsigned long val;
37
38	apic_write(APIC_DFR, APIC_DFR_FLAT);
39	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
40	val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
41	apic_write(APIC_LDR, val);
42}

 1/*
 2 * Common functions shared between the various APIC flavours
 3 *
 4 * SPDX-License-Identifier: GPL-2.0
 5 */
 6#include <linux/irq.h>
 7#include <asm/apic.h>
 8
 9#include "local.h"
10
11u32 apic_default_calc_apicid(unsigned int cpu)
12{
13	return per_cpu(x86_cpu_to_apicid, cpu);
14}
15
16u32 apic_flat_calc_apicid(unsigned int cpu)
17{
18	return 1U << cpu;
19}
20
21bool default_check_apicid_used(physid_mask_t *map, u32 apicid)
22{
23	return physid_isset(apicid, *map);
24}
25
26void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
27{
28	*retmap = *phys_map;
29}
30
31u32 default_cpu_present_to_apicid(int mps_cpu)
32{
33	if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
34		return (int)per_cpu(x86_cpu_to_apicid, mps_cpu);
35	else
36		return BAD_APICID;
37}
38EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid);
39
40bool default_apic_id_registered(void)
41{
42	return physid_isset(read_apic_id(), phys_cpu_present_map);
43}
44
45/*
46 * Set up the logical destination ID when the APIC operates in logical
47 * destination mode.
48 */
49void default_init_apic_ldr(void)
50{
51	unsigned long val;
52
53	apic_write(APIC_DFR, APIC_DFR_FLAT);
54	val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
55	val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
56	apic_write(APIC_LDR, val);
57}