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#ifndef __ASM_SMP_H
#define __ASM_SMP_H
#ifndef __ASSEMBLY__
extern cpumask_t cpu_callin_map;
extern void (*mtrr_hook)(void);
extern void zap_low_mappings(void);
#ifdef CONFIG_SMP
/*
* This function is needed by all SMP systems. It must _always_ be valid
* from the initial startup. We map APIC_BASE very early in page_setup(),
* so this is correct in the x86 case.
*/
DECLARE_PER_CPU(int, cpu_number);
#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
extern int safe_smp_processor_id(void);
/* We don't mark CPUs online until __cpu_up(), so we need another measure */
static inline int num_booting_cpus(void)
{
return cpus_weight(cpu_callout_map);
}
#else /* CONFIG_SMP */
#define safe_smp_processor_id() 0
#endif /* !CONFIG_SMP */
#endif /* !ASSEMBLY */
#endif
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