blob: 694d3245a88f1d5aac92df9490449022d241d930 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
#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
|
