[mirror_ubuntu-kernels.git] / include / asm-x86 / smp_32.h

#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
Commit	Line	Data
1da177e4 LT	1	#ifndef __ASM_SMP_H
	2	#define __ASM_SMP_H
	3
ae9d983b	4	#ifndef __ASSEMBLY__
1da177e4	5
ae9d983b	6	extern cpumask_t cpu_callin_map;
1da177e4	7
2fec394a JP	8	extern void (*mtrr_hook)(void);
2fec394a JP	9	extern void zap_low_mappings(void);
1da177e4	10
ae9d983b	11	#ifdef CONFIG_SMP
1da177e4 LT	12	/*
	13	* This function is needed by all SMP systems. It must _always_ be valid
	14	* from the initial startup. We map APIC_BASE very early in page_setup(),
	15	* so this is correct in the x86 case.
	16	*/
7c3576d2 JF	17	DECLARE_PER_CPU(int, cpu_number);
7c3576d2 JF	18	#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
1da177e4	19
ae9d983b TG	20	extern int safe_smp_processor_id(void);
ae9d983b TG	21
1da177e4 LT	22	/* We don't mark CPUs online until __cpu_up(), so we need another measure */
	23	static inline int num_booting_cpus(void)
	24	{
	25	return cpus_weight(cpu_callout_map);
	26	}
	27
b4033c17	28	#else /* CONFIG_SMP */
dc2bc768	29	#define safe_smp_processor_id() 0
ae9d983b	30	#endif /* !CONFIG_SMP */
815a965b	31
ae9d983b	32	#endif /* !ASSEMBLY */
1da177e4	33	#endif