5 * We need the APIC definitions automatically as part of 'smp.h'
7 #include <linux/threads.h>
8 #include <linux/cpumask.h>
9 #include <linux/bitops.h>
10 #include <linux/init.h>
11 extern int disable_apic
;
13 #include <asm/mpspec.h>
15 #include <asm/io_apic.h>
16 #include <asm/thread_info.h>
24 extern cpumask_t cpu_present_mask
;
25 extern cpumask_t cpu_possible_map
;
26 extern cpumask_t cpu_online_map
;
27 extern cpumask_t cpu_callout_map
;
28 extern cpumask_t cpu_initialized
;
31 * Private routines/data
34 extern void smp_alloc_memory(void);
35 extern volatile unsigned long smp_invalidate_needed
;
36 extern void lock_ipi_call_lock(void);
37 extern void unlock_ipi_call_lock(void);
38 extern int smp_num_siblings
;
39 extern void smp_send_reschedule(int cpu
);
40 extern int smp_call_function_mask(cpumask_t mask
, void (*func
)(void *),
41 void *info
, int wait
);
44 * cpu_sibling_map and cpu_core_map now live
47 * extern cpumask_t cpu_sibling_map[NR_CPUS];
48 * extern cpumask_t cpu_core_map[NR_CPUS];
50 DECLARE_PER_CPU(cpumask_t
, cpu_sibling_map
);
51 DECLARE_PER_CPU(cpumask_t
, cpu_core_map
);
52 DECLARE_PER_CPU(u8
, cpu_llc_id
);
54 #define SMP_TRAMPOLINE_BASE 0x6000
57 * On x86 all CPUs are mapped 1:1 to the APIC space.
58 * This simplifies scheduling and IPI sending and
59 * compresses data structures.
62 static inline int num_booting_cpus(void)
64 return cpus_weight(cpu_callout_map
);
67 #define raw_smp_processor_id() read_pda(cpunumber)
69 extern int __cpu_disable(void);
70 extern void __cpu_die(unsigned int cpu
);
71 extern void prefill_possible_map(void);
72 extern unsigned num_processors
;
73 extern unsigned __cpuinitdata disabled_cpus
;
75 #define NO_PROC_ID 0xFF /* No processor magic marker */
77 #endif /* CONFIG_SMP */
79 #define safe_smp_processor_id() smp_processor_id()
81 static inline int hard_smp_processor_id(void)
83 /* we don't want to mark this access volatile - bad code generation */
84 return GET_APIC_ID(*(unsigned int *)(APIC_BASE
+APIC_ID
));
88 * Some lowlevel functions might want to know about
89 * the real APIC ID <-> CPU # mapping.
91 extern u8 __initdata x86_cpu_to_apicid_init
[];
92 extern void *x86_cpu_to_apicid_ptr
;
93 DECLARE_PER_CPU(u8
, x86_cpu_to_apicid
); /* physical ID */
94 extern u8 bios_cpu_apicid
[];
96 static inline int cpu_present_to_apicid(int mps_cpu
)
98 if (mps_cpu
< NR_CPUS
)
99 return (int)bios_cpu_apicid
[mps_cpu
];
105 #define stack_smp_processor_id() 0
106 #define cpu_logical_map(x) (x)
108 #include <asm/thread_info.h>
109 #define stack_smp_processor_id() \
111 struct thread_info *ti; \
112 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
117 static __inline
int logical_smp_processor_id(void)
119 /* we don't want to mark this access volatile - bad code generation */
120 return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE
+APIC_LDR
));
124 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
126 extern unsigned int boot_cpu_id
;
127 #define cpu_physical_id(cpu) boot_cpu_id
128 #endif /* !CONFIG_SMP */