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Linux kernel mirror (for testing)
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kernel
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linux
1#ifndef __ASM_SMP_H
2#define __ASM_SMP_H
3
4/*
5 * We need the APIC definitions automatically as part of 'smp.h'
6 */
7#include <linux/threads.h>
8#include <linux/cpumask.h>
9#include <linux/bitops.h>
10#include <linux/init.h>
11extern int disable_apic;
12
13#include <asm/mpspec.h>
14#include <asm/apic.h>
15#include <asm/io_apic.h>
16#include <asm/thread_info.h>
17
18#ifdef CONFIG_SMP
19
20#include <asm/pda.h>
21
22struct pt_regs;
23
24extern cpumask_t cpu_present_mask;
25extern cpumask_t cpu_possible_map;
26extern cpumask_t cpu_online_map;
27extern cpumask_t cpu_callout_map;
28extern cpumask_t cpu_initialized;
29
30/*
31 * Private routines/data
32 */
33
34extern void smp_alloc_memory(void);
35extern volatile unsigned long smp_invalidate_needed;
36extern void lock_ipi_call_lock(void);
37extern void unlock_ipi_call_lock(void);
38extern int smp_num_siblings;
39extern void smp_send_reschedule(int cpu);
40extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
41 void *info, int wait);
42
43/*
44 * cpu_sibling_map and cpu_core_map now live
45 * in the per cpu area
46 *
47 * extern cpumask_t cpu_sibling_map[NR_CPUS];
48 * extern cpumask_t cpu_core_map[NR_CPUS];
49 */
50DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
51DECLARE_PER_CPU(cpumask_t, cpu_core_map);
52DECLARE_PER_CPU(u8, cpu_llc_id);
53
54#define SMP_TRAMPOLINE_BASE 0x6000
55
56/*
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.
60 */
61
62static inline int num_booting_cpus(void)
63{
64 return cpus_weight(cpu_callout_map);
65}
66
67#define raw_smp_processor_id() read_pda(cpunumber)
68
69extern int __cpu_disable(void);
70extern void __cpu_die(unsigned int cpu);
71extern void prefill_possible_map(void);
72extern unsigned num_processors;
73extern unsigned __cpuinitdata disabled_cpus;
74
75#define NO_PROC_ID 0xFF /* No processor magic marker */
76
77#endif /* CONFIG_SMP */
78
79#define safe_smp_processor_id() smp_processor_id()
80
81static inline int hard_smp_processor_id(void)
82{
83 /* we don't want to mark this access volatile - bad code generation */
84 return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
85}
86
87/*
88 * Some lowlevel functions might want to know about
89 * the real APIC ID <-> CPU # mapping.
90 */
91extern u8 __initdata x86_cpu_to_apicid_init[];
92extern void *x86_cpu_to_apicid_ptr;
93DECLARE_PER_CPU(u8, x86_cpu_to_apicid); /* physical ID */
94extern u8 bios_cpu_apicid[];
95
96static inline int cpu_present_to_apicid(int mps_cpu)
97{
98 if (mps_cpu < NR_CPUS)
99 return (int)bios_cpu_apicid[mps_cpu];
100 else
101 return BAD_APICID;
102}
103
104#ifndef CONFIG_SMP
105#define stack_smp_processor_id() 0
106#define cpu_logical_map(x) (x)
107#else
108#include <asm/thread_info.h>
109#define stack_smp_processor_id() \
110({ \
111 struct thread_info *ti; \
112 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
113 ti->cpu; \
114})
115#endif
116
117static __inline int logical_smp_processor_id(void)
118{
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));
121}
122
123#ifdef CONFIG_SMP
124#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
125#else
126extern unsigned int boot_cpu_id;
127#define cpu_physical_id(cpu) boot_cpu_id
128#endif /* !CONFIG_SMP */
129#endif
130