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 #ifndef __ASSEMBLY__
8 #include <linux/kernel.h>
9 #include <linux/threads.h>
10 #include <linux/cpumask.h>
11 #endif
12
13 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(__ASSEMBLY__)
14 #include <linux/bitops.h>
15 #include <asm/mpspec.h>
16 #include <asm/apic.h>
17 #ifdef CONFIG_X86_IO_APIC
18 #include <asm/io_apic.h>
19 #endif
20 #endif
21
22 #define BAD_APICID 0xFFu
23 #ifdef CONFIG_SMP
24 #ifndef __ASSEMBLY__
25
26 /*
27 * Private routines/data
28 */
29
30 extern void smp_alloc_memory(void);
31 extern int pic_mode;
32 extern int smp_num_siblings;
33 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
34 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
35
36 extern void (*mtrr_hook) (void);
37 extern void zap_low_mappings (void);
38 extern void lock_ipi_call_lock(void);
39 extern void unlock_ipi_call_lock(void);
40
41 #define MAX_APICID 256
42 extern u8 __initdata x86_cpu_to_apicid_init[];
43 extern void *x86_cpu_to_apicid_ptr;
44 DECLARE_PER_CPU(u8, x86_cpu_to_apicid);
45
46 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
47
48 extern void set_cpu_sibling_map(int cpu);
49
50 #ifdef CONFIG_HOTPLUG_CPU
51 extern void cpu_exit_clear(void);
52 extern void cpu_uninit(void);
53 extern void remove_siblinginfo(int cpu);
54 #endif
55
56 struct smp_ops
57 {
58 void (*smp_prepare_boot_cpu)(void);
59 void (*smp_prepare_cpus)(unsigned max_cpus);
60 int (*cpu_up)(unsigned cpu);
61 void (*smp_cpus_done)(unsigned max_cpus);
62
63 void (*smp_send_stop)(void);
64 void (*smp_send_reschedule)(int cpu);
65 int (*smp_call_function_mask)(cpumask_t mask,
66 void (*func)(void *info), void *info,
67 int wait);
68 };
69
70 extern struct smp_ops smp_ops;
71
smp_prepare_boot_cpu(void)72 static inline void smp_prepare_boot_cpu(void)
73 {
74 smp_ops.smp_prepare_boot_cpu();
75 }
smp_prepare_cpus(unsigned int max_cpus)76 static inline void smp_prepare_cpus(unsigned int max_cpus)
77 {
78 smp_ops.smp_prepare_cpus(max_cpus);
79 }
__cpu_up(unsigned int cpu)80 static inline int __cpu_up(unsigned int cpu)
81 {
82 return smp_ops.cpu_up(cpu);
83 }
smp_cpus_done(unsigned int max_cpus)84 static inline void smp_cpus_done(unsigned int max_cpus)
85 {
86 smp_ops.smp_cpus_done(max_cpus);
87 }
88
smp_send_stop(void)89 static inline void smp_send_stop(void)
90 {
91 smp_ops.smp_send_stop();
92 }
smp_send_reschedule(int cpu)93 static inline void smp_send_reschedule(int cpu)
94 {
95 smp_ops.smp_send_reschedule(cpu);
96 }
smp_call_function_mask(cpumask_t mask,void (* func)(void * info),void * info,int wait)97 static inline int smp_call_function_mask(cpumask_t mask,
98 void (*func) (void *info), void *info,
99 int wait)
100 {
101 return smp_ops.smp_call_function_mask(mask, func, info, wait);
102 }
103
104 void native_smp_prepare_boot_cpu(void);
105 void native_smp_prepare_cpus(unsigned int max_cpus);
106 int native_cpu_up(unsigned int cpunum);
107 void native_smp_cpus_done(unsigned int max_cpus);
108
109 #ifndef CONFIG_PARAVIRT
110 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) \
111 do { } while (0)
112 #endif
113
114 /*
115 * This function is needed by all SMP systems. It must _always_ be valid
116 * from the initial startup. We map APIC_BASE very early in page_setup(),
117 * so this is correct in the x86 case.
118 */
119 DECLARE_PER_CPU(int, cpu_number);
120 #define raw_smp_processor_id() (x86_read_percpu(cpu_number))
121
122 extern cpumask_t cpu_callout_map;
123 extern cpumask_t cpu_callin_map;
124 extern cpumask_t cpu_possible_map;
125
126 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
num_booting_cpus(void)127 static inline int num_booting_cpus(void)
128 {
129 return cpus_weight(cpu_callout_map);
130 }
131
132 extern int safe_smp_processor_id(void);
133 extern int __cpu_disable(void);
134 extern void __cpu_die(unsigned int cpu);
135 extern unsigned int num_processors;
136
137 void __cpuinit smp_store_cpu_info(int id);
138
139 #endif /* !__ASSEMBLY__ */
140
141 #else /* CONFIG_SMP */
142
143 #define safe_smp_processor_id() 0
144 #define cpu_physical_id(cpu) boot_cpu_physical_apicid
145
146 #define NO_PROC_ID 0xFF /* No processor magic marker */
147
148 #endif /* CONFIG_SMP */
149
150 #ifndef __ASSEMBLY__
151
152 #ifdef CONFIG_X86_LOCAL_APIC
153
154 #ifdef APIC_DEFINITION
155 extern int hard_smp_processor_id(void);
156 #else
157 #include <mach_apicdef.h>
hard_smp_processor_id(void)158 static inline int hard_smp_processor_id(void)
159 {
160 /* we don't want to mark this access volatile - bad code generation */
161 return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
162 }
163 #endif /* APIC_DEFINITION */
164
165 #else /* CONFIG_X86_LOCAL_APIC */
166
167 #ifndef CONFIG_SMP
168 #define hard_smp_processor_id() 0
169 #endif
170
171 #endif /* CONFIG_X86_LOCAL_APIC */
172
173 extern u8 apicid_2_node[];
174
175 #ifdef CONFIG_X86_LOCAL_APIC
logical_smp_processor_id(void)176 static __inline int logical_smp_processor_id(void)
177 {
178 /* we don't want to mark this access volatile - bad code generation */
179 return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
180 }
181 #endif
182 #endif
183
184 #endif
185