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Linux/arch/x86/include/asm/smp.h

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  1 #ifndef _ASM_X86_SMP_H
  2 #define _ASM_X86_SMP_H
  3 #ifndef __ASSEMBLY__
  4 #include <linux/cpumask.h>
  5 #include <asm/percpu.h>
  6 
  7 /*
  8  * We need the APIC definitions automatically as part of 'smp.h'
  9  */
 10 #ifdef CONFIG_X86_LOCAL_APIC
 11 # include <asm/mpspec.h>
 12 # include <asm/apic.h>
 13 # ifdef CONFIG_X86_IO_APIC
 14 #  include <asm/io_apic.h>
 15 # endif
 16 #endif
 17 #include <asm/thread_info.h>
 18 #include <asm/cpumask.h>
 19 
 20 extern int smp_num_siblings;
 21 extern unsigned int num_processors;
 22 
 23 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
 24 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
 25 /* cpus sharing the last level cache: */
 26 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
 27 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
 28 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
 29 
 30 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
 31 {
 32         return per_cpu(cpu_llc_shared_map, cpu);
 33 }
 34 
 35 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
 36 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
 37 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
 38 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
 39 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
 40 #endif
 41 
 42 struct task_struct;
 43 
 44 struct smp_ops {
 45         void (*smp_prepare_boot_cpu)(void);
 46         void (*smp_prepare_cpus)(unsigned max_cpus);
 47         void (*smp_cpus_done)(unsigned max_cpus);
 48 
 49         void (*stop_other_cpus)(int wait);
 50         void (*crash_stop_other_cpus)(void);
 51         void (*smp_send_reschedule)(int cpu);
 52 
 53         int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
 54         int (*cpu_disable)(void);
 55         void (*cpu_die)(unsigned int cpu);
 56         void (*play_dead)(void);
 57 
 58         void (*send_call_func_ipi)(const struct cpumask *mask);
 59         void (*send_call_func_single_ipi)(int cpu);
 60 };
 61 
 62 /* Globals due to paravirt */
 63 extern void set_cpu_sibling_map(int cpu);
 64 
 65 #ifdef CONFIG_SMP
 66 extern struct smp_ops smp_ops;
 67 
 68 static inline void smp_send_stop(void)
 69 {
 70         smp_ops.stop_other_cpus(0);
 71 }
 72 
 73 static inline void stop_other_cpus(void)
 74 {
 75         smp_ops.stop_other_cpus(1);
 76 }
 77 
 78 static inline void smp_prepare_boot_cpu(void)
 79 {
 80         smp_ops.smp_prepare_boot_cpu();
 81 }
 82 
 83 static inline void smp_prepare_cpus(unsigned int max_cpus)
 84 {
 85         smp_ops.smp_prepare_cpus(max_cpus);
 86 }
 87 
 88 static inline void smp_cpus_done(unsigned int max_cpus)
 89 {
 90         smp_ops.smp_cpus_done(max_cpus);
 91 }
 92 
 93 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
 94 {
 95         return smp_ops.cpu_up(cpu, tidle);
 96 }
 97 
 98 static inline int __cpu_disable(void)
 99 {
100         return smp_ops.cpu_disable();
101 }
102 
103 static inline void __cpu_die(unsigned int cpu)
104 {
105         smp_ops.cpu_die(cpu);
106 }
107 
108 static inline void play_dead(void)
109 {
110         smp_ops.play_dead();
111 }
112 
113 static inline void smp_send_reschedule(int cpu)
114 {
115         smp_ops.smp_send_reschedule(cpu);
116 }
117 
118 static inline void arch_send_call_function_single_ipi(int cpu)
119 {
120         smp_ops.send_call_func_single_ipi(cpu);
121 }
122 
123 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
124 {
125         smp_ops.send_call_func_ipi(mask);
126 }
127 
128 void cpu_disable_common(void);
129 void native_smp_prepare_boot_cpu(void);
130 void native_smp_prepare_cpus(unsigned int max_cpus);
131 void native_smp_cpus_done(unsigned int max_cpus);
132 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
133 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
134 int native_cpu_disable(void);
135 int common_cpu_die(unsigned int cpu);
136 void native_cpu_die(unsigned int cpu);
137 void hlt_play_dead(void);
138 void native_play_dead(void);
139 void play_dead_common(void);
140 void wbinvd_on_cpu(int cpu);
141 int wbinvd_on_all_cpus(void);
142 
143 void native_send_call_func_ipi(const struct cpumask *mask);
144 void native_send_call_func_single_ipi(int cpu);
145 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
146 
147 void smp_store_boot_cpu_info(void);
148 void smp_store_cpu_info(int id);
149 #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
150 #define cpu_acpi_id(cpu)        per_cpu(x86_cpu_to_acpiid, cpu)
151 
152 /*
153  * This function is needed by all SMP systems. It must _always_ be valid
154  * from the initial startup. We map APIC_BASE very early in page_setup(),
155  * so this is correct in the x86 case.
156  */
157 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
158 
159 #ifdef CONFIG_X86_32
160 extern int safe_smp_processor_id(void);
161 #else
162 # define safe_smp_processor_id()        smp_processor_id()
163 #endif
164 
165 #else /* !CONFIG_SMP */
166 #define wbinvd_on_cpu(cpu)     wbinvd()
167 static inline int wbinvd_on_all_cpus(void)
168 {
169         wbinvd();
170         return 0;
171 }
172 #define smp_num_siblings        1
173 #endif /* CONFIG_SMP */
174 
175 extern unsigned disabled_cpus;
176 
177 #ifdef CONFIG_X86_LOCAL_APIC
178 
179 #ifndef CONFIG_X86_64
180 static inline int logical_smp_processor_id(void)
181 {
182         /* we don't want to mark this access volatile - bad code generation */
183         return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
184 }
185 
186 #endif
187 
188 extern int hard_smp_processor_id(void);
189 
190 #else /* CONFIG_X86_LOCAL_APIC */
191 #define hard_smp_processor_id() 0
192 #endif /* CONFIG_X86_LOCAL_APIC */
193 
194 #ifdef CONFIG_DEBUG_NMI_SELFTEST
195 extern void nmi_selftest(void);
196 #else
197 #define nmi_selftest() do { } while (0)
198 #endif
199 
200 #endif /* __ASSEMBLY__ */
201 #endif /* _ASM_X86_SMP_H */
202 

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