1 #ifndef __ASM_SMP_H
2 #define __ASM_SMP_H
3
4 #include <linux/cpumask.h>
5 #include <linux/init.h>
6
7 /*
8 * We need the APIC definitions automatically as part of 'smp.h'
9 */
10 #include <asm/apic.h>
11 #include <asm/io_apic.h>
12 #include <asm/mpspec.h>
13 #include <asm/pda.h>
14 #include <asm/thread_info.h>
15
16 extern cpumask_t cpu_callout_map;
17 extern cpumask_t cpu_initialized;
18
19 extern int smp_num_siblings;
20 extern unsigned int num_processors;
21
22 extern void smp_alloc_memory(void);
23 extern void lock_ipi_call_lock(void);
24 extern void unlock_ipi_call_lock(void);
25
26 extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
27 void *info, int wait);
28
29 extern u16 __initdata x86_cpu_to_apicid_init[];
30 extern u16 __initdata x86_bios_cpu_apicid_init[];
31 extern void *x86_cpu_to_apicid_early_ptr;
32 extern void *x86_bios_cpu_apicid_early_ptr;
33
34 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
35 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
36 DECLARE_PER_CPU(u16, cpu_llc_id);
37 DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
38 DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
39
40 static inline int cpu_present_to_apicid(int mps_cpu)
41 {
42 if (cpu_present(mps_cpu))
43 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
44 else
45 return BAD_APICID;
46 }
47
48 #ifdef CONFIG_SMP
49
50 #define SMP_TRAMPOLINE_BASE 0x6000
51
52 extern int __cpu_disable(void);
53 extern void __cpu_die(unsigned int cpu);
54 extern void prefill_possible_map(void);
55 extern unsigned __cpuinitdata disabled_cpus;
56
57 #define raw_smp_processor_id() read_pda(cpunumber)
58 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
59
60 #define stack_smp_processor_id() \
61 ({ \
62 struct thread_info *ti; \
63 __asm__("andq %%rsp,%0; ":"=r" (ti) : "" (CURRENT_MASK)); \
64 ti->cpu; \
65 })
66
67 /*
68 * On x86 all CPUs are mapped 1:1 to the APIC space. This simplifies
69 * scheduling and IPI sending and compresses data structures.
70 */
71 static inline int num_booting_cpus(void)
72 {
73 return cpus_weight(cpu_callout_map);
74 }
75
76 extern void smp_send_reschedule(int cpu);
77
78 #else /* CONFIG_SMP */
79
80 extern unsigned int boot_cpu_id;
81 #define cpu_physical_id(cpu) boot_cpu_id
82 #define stack_smp_processor_id() 0
83
84 #endif /* !CONFIG_SMP */
85
86 #define safe_smp_processor_id() smp_processor_id()
87
88 static __inline int logical_smp_processor_id(void)
89 {
90 /* we don't want to mark this access volatile - bad code generation */
91 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
92 }
93
94 static inline int hard_smp_processor_id(void)
95 {
96 /* we don't want to mark this access volatile - bad code generation */
97 return GET_APIC_ID(*(u32 *)(APIC_BASE + APIC_ID));
98 }
99
100 #endif
101
102
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