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 extern int disable_apic;
12 #include <asm/fixmap.h>
13 #include <asm/mpspec.h>
14 #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_initialized;
30 * Private routines/data
33 extern void smp_alloc_memory(void);
34 extern volatile unsigned long smp_invalidate_needed;
35 extern void lock_ipi_call_lock(void);
36 extern void unlock_ipi_call_lock(void);
37 extern int smp_num_siblings;
38 extern void smp_send_reschedule(int cpu);
39 void smp_stop_cpu(void);
40 extern int smp_call_function_single(int cpuid, void (*func) (void *info),
41 void *info, int retry, int wait);
43 extern cpumask_t cpu_sibling_map[NR_CPUS];
44 extern cpumask_t cpu_core_map[NR_CPUS];
45 extern u8 cpu_llc_id[NR_CPUS];
47 #define SMP_TRAMPOLINE_BASE 0x6000
50 * On x86 all CPUs are mapped 1:1 to the APIC space.
51 * This simplifies scheduling and IPI sending and
52 * compresses data structures.
55 static inline int num_booting_cpus(void)
57 return cpus_weight(cpu_possible_map);
60 #define raw_smp_processor_id() read_pda(cpunumber)
62 static inline int hard_smp_processor_id(void)
64 /* we don't want to mark this access volatile - bad code generation */
65 return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
68 extern int __cpu_disable(void);
69 extern void __cpu_die(unsigned int cpu);
70 extern void prefill_possible_map(void);
71 extern unsigned num_processors;
72 extern unsigned disabled_cpus;
74 #define NO_PROC_ID 0xFF /* No processor magic marker */
79 * Some lowlevel functions might want to know about
80 * the real APIC ID <-> CPU # mapping.
82 extern u8 x86_cpu_to_apicid[NR_CPUS]; /* physical ID */
83 extern u8 x86_cpu_to_log_apicid[NR_CPUS];
84 extern u8 bios_cpu_apicid[];
86 static inline int cpu_present_to_apicid(int mps_cpu)
88 if (mps_cpu < NR_CPUS)
89 return (int)bios_cpu_apicid[mps_cpu];
95 #define stack_smp_processor_id() 0
96 #define cpu_logical_map(x) (x)
98 #include <asm/thread_info.h>
99 #define stack_smp_processor_id() \
101 struct thread_info *ti; \
102 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
107 static __inline int logical_smp_processor_id(void)
109 /* we don't want to mark this access volatile - bad code generation */
110 return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
114 #define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
116 #define cpu_physical_id(cpu) boot_cpu_id
117 #endif /* !CONFIG_SMP */