4 #include <linux/cpumask.h>
5 #include <linux/init.h>
8 * We need the APIC definitions automatically as part of 'smp.h'
11 #include <asm/io_apic.h>
12 #include <asm/mpspec.h>
14 #include <asm/thread_info.h>
16 extern cpumask_t cpu_callout_map;
17 extern cpumask_t cpu_initialized;
19 extern int smp_num_siblings;
20 extern unsigned int num_processors;
22 extern void smp_alloc_memory(void);
23 extern void lock_ipi_call_lock(void);
24 extern void unlock_ipi_call_lock(void);
26 extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
27 void *info, int wait);
29 extern u8 __initdata x86_cpu_to_apicid_init[];
30 extern void *x86_cpu_to_apicid_ptr;
31 extern u8 bios_cpu_apicid[];
33 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
34 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
35 DECLARE_PER_CPU(u8, cpu_llc_id);
36 DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
38 static inline int cpu_present_to_apicid(int mps_cpu)
40 if (mps_cpu < NR_CPUS)
41 return (int)bios_cpu_apicid[mps_cpu];
48 #define SMP_TRAMPOLINE_BASE 0x6000
50 extern int __cpu_disable(void);
51 extern void __cpu_die(unsigned int cpu);
52 extern void prefill_possible_map(void);
53 extern unsigned __cpuinitdata disabled_cpus;
55 #define raw_smp_processor_id() read_pda(cpunumber)
56 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
58 #define stack_smp_processor_id() \
60 struct thread_info *ti; \
61 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
66 * On x86 all CPUs are mapped 1:1 to the APIC space. This simplifies
67 * scheduling and IPI sending and compresses data structures.
69 static inline int num_booting_cpus(void)
71 return cpus_weight(cpu_callout_map);
74 extern void smp_send_reschedule(int cpu);
76 #else /* CONFIG_SMP */
78 extern unsigned int boot_cpu_id;
79 #define cpu_physical_id(cpu) boot_cpu_id
80 #define stack_smp_processor_id() 0
82 #endif /* !CONFIG_SMP */
84 #define safe_smp_processor_id() smp_processor_id()
86 static __inline int logical_smp_processor_id(void)
88 /* we don't want to mark this access volatile - bad code generation */
89 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
92 static inline int hard_smp_processor_id(void)
94 /* we don't want to mark this access volatile - bad code generation */
95 return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));