5 #include <linux/cpumask.h>
6 #include <linux/init.h>
9 * We need the APIC definitions automatically as part of 'smp.h'
11 #ifdef CONFIG_X86_LOCAL_APIC
12 # include <asm/mpspec.h>
13 # include <asm/apic.h>
14 # ifdef CONFIG_X86_IO_APIC
15 # include <asm/io_apic.h>
19 extern cpumask_t cpu_callin_map
;
21 extern void (*mtrr_hook
) (void);
22 extern void zap_low_mappings (void);
24 extern u16 __initdata x86_cpu_to_apicid_init
[];
25 extern void *x86_cpu_to_apicid_early_ptr
;
27 DECLARE_PER_CPU(cpumask_t
, cpu_sibling_map
);
28 DECLARE_PER_CPU(cpumask_t
, cpu_core_map
);
29 DECLARE_PER_CPU(u16
, cpu_llc_id
);
30 DECLARE_PER_CPU(u16
, x86_cpu_to_apicid
);
34 * This function is needed by all SMP systems. It must _always_ be valid
35 * from the initial startup. We map APIC_BASE very early in page_setup(),
36 * so this is correct in the x86 case.
38 DECLARE_PER_CPU(int, cpu_number
);
39 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
41 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
43 extern int safe_smp_processor_id(void);
45 void __cpuinit
smp_store_cpu_info(int id
);
47 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
48 static inline int num_booting_cpus(void)
50 return cpus_weight(cpu_callout_map
);
53 #else /* CONFIG_SMP */
55 #define safe_smp_processor_id() 0
56 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
58 #endif /* !CONFIG_SMP */
60 #ifdef CONFIG_X86_LOCAL_APIC
62 static __inline
int logical_smp_processor_id(void)
64 /* we don't want to mark this access volatile - bad code generation */
65 return GET_APIC_LOGICAL_ID(*(u32
*)(APIC_BASE
+ APIC_LDR
));
68 # ifdef APIC_DEFINITION
69 extern int hard_smp_processor_id(void);
71 # include <mach_apicdef.h>
72 static inline int hard_smp_processor_id(void)
74 /* we don't want to mark this access volatile - bad code generation */
75 return GET_APIC_ID(*(u32
*)(APIC_BASE
+ APIC_ID
));
77 # endif /* APIC_DEFINITION */
79 #else /* CONFIG_X86_LOCAL_APIC */
82 # define hard_smp_processor_id() 0
85 #endif /* CONFIG_X86_LOCAL_APIC */
87 #endif /* !ASSEMBLY */