2 * Common functions shared between the various APIC flavours
4 * SPDX-License-Identifier: GPL-2.0
11 u32 apic_default_calc_apicid(unsigned int cpu)
13 return per_cpu(x86_cpu_to_apicid, cpu);
16 u32 apic_flat_calc_apicid(unsigned int cpu)
21 bool default_check_apicid_used(physid_mask_t *map, u32 apicid)
23 return physid_isset(apicid, *map);
26 void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
31 u32 default_cpu_present_to_apicid(int mps_cpu)
33 if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
34 return (int)per_cpu(x86_cpu_to_apicid, mps_cpu);
38 EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid);
40 bool default_apic_id_registered(void)
42 return physid_isset(read_apic_id(), phys_cpu_present_map);
46 * Set up the logical destination ID when the APIC operates in logical
49 void default_init_apic_ldr(void)
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);