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);
41 extern cpumask_t cpu_sibling_map[NR_CPUS];
42 extern cpumask_t cpu_core_map[NR_CPUS];
43 extern u8 cpu_llc_id[NR_CPUS];
45 #define SMP_TRAMPOLINE_BASE 0x6000
48 * On x86 all CPUs are mapped 1:1 to the APIC space.
49 * This simplifies scheduling and IPI sending and
50 * compresses data structures.
53 static inline int num_booting_cpus(void)
55 return cpus_weight(cpu_callout_map);
58 #define raw_smp_processor_id() read_pda(cpunumber)
60 extern int __cpu_disable(void);
61 extern void __cpu_die(unsigned int cpu);
62 extern void prefill_possible_map(void);
63 extern unsigned num_processors;
64 extern unsigned __cpuinitdata disabled_cpus;
66 #define NO_PROC_ID 0xFF /* No processor magic marker */
68 #endif /* CONFIG_SMP */
70 static inline int hard_smp_processor_id(void)
72 /* we don't want to mark this access volatile - bad code generation */
73 return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
77 * Some lowlevel functions might want to know about
78 * the real APIC ID <-> CPU # mapping.
80 extern u8 x86_cpu_to_apicid[NR_CPUS]; /* physical ID */
81 extern u8 x86_cpu_to_log_apicid[NR_CPUS];
82 extern u8 bios_cpu_apicid[];
84 static inline int cpu_present_to_apicid(int mps_cpu)
86 if (mps_cpu < NR_CPUS)
87 return (int)bios_cpu_apicid[mps_cpu];
93 #define stack_smp_processor_id() 0
94 #define cpu_logical_map(x) (x)
96 #include <asm/thread_info.h>
97 #define stack_smp_processor_id() \
99 struct thread_info *ti; \
100 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
105 static __inline int logical_smp_processor_id(void)
107 /* we don't want to mark this access volatile - bad code generation */
108 return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
112 #define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
114 #define cpu_physical_id(cpu) boot_cpu_id
115 #endif /* !CONFIG_SMP */