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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
#ifndef __ASM_SMP_H
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#define __ASM_SMP_H
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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#include <linux/init.h>
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/*
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* We need the APIC definitions automatically as part of 'smp.h'
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*/
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#ifdef CONFIG_X86_LOCAL_APIC
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# include <asm/mpspec.h>
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# include <asm/apic.h>
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# ifdef CONFIG_X86_IO_APIC
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# include <asm/io_apic.h>
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# endif
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#endif
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extern cpumask_t cpu_callin_map;
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extern void (*mtrr_hook)(void);
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extern void zap_low_mappings(void);
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#ifdef CONFIG_SMP
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/*
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* This function is needed by all SMP systems. It must _always_ be valid
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* from the initial startup. We map APIC_BASE very early in page_setup(),
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* so this is correct in the x86 case.
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*/
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DECLARE_PER_CPU(int, cpu_number);
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#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
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extern int safe_smp_processor_id(void);
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/* We don't mark CPUs online until __cpu_up(), so we need another measure */
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static inline int num_booting_cpus(void)
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{
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return cpus_weight(cpu_callout_map);
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}
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#else /* CONFIG_SMP */
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#define safe_smp_processor_id() 0
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#endif /* !CONFIG_SMP */
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#ifdef CONFIG_X86_LOCAL_APIC
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static inline int logical_smp_processor_id(void)
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{
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/* we don't want to mark this access volatile - bad code generation */
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return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
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}
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# ifdef APIC_DEFINITION
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extern int hard_smp_processor_id(void);
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# else
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# include <mach_apicdef.h>
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static inline int hard_smp_processor_id(void)
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{
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/* we don't want to mark this access volatile - bad code generation */
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return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
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}
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# endif /* APIC_DEFINITION */
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#else /* CONFIG_X86_LOCAL_APIC */
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# ifndef CONFIG_SMP
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# define hard_smp_processor_id() 0
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# endif
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#endif /* CONFIG_X86_LOCAL_APIC */
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#endif /* !ASSEMBLY */
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#endif
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