1 #ifndef _ASM_X86_SMP_H 2 #define _ASM_X86_SMP_H 3 #ifndef __ASSEMBLY__ 4 #include <linux/cpumask.h> 5 #include <linux/init.h> 6 #include <asm/percpu.h> 7 8 /* 9 * We need the APIC definitions automatically as part of 'smp.h' 10 */ 11 #ifdef CONFIG_X86_LOCAL_APIC 12 # include <asm/mpspec.h> 13 # include <asm/apic.h> 14 # ifdef CONFIG_X86_IO_APIC 15 # include <asm/io_apic.h> 16 # endif 17 #endif 18 #include <asm/thread_info.h> 19 #include <asm/cpumask.h> 20 21 extern int smp_num_siblings; 22 extern unsigned int num_processors; 23 24 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); 25 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); 26 DECLARE_PER_CPU(u16, cpu_llc_id); 27 DECLARE_PER_CPU(int, cpu_number); 28 29 static inline struct cpumask *cpu_sibling_mask(int cpu) 30 { 31 return per_cpu(cpu_sibling_map, cpu); 32 } 33 34 static inline struct cpumask *cpu_core_mask(int cpu) 35 { 36 return per_cpu(cpu_core_map, cpu); 37 } 38 39 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid); 40 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid); 41 42 /* Static state in head.S used to set up a CPU */ 43 extern struct { 44 void *sp; 45 unsigned short ss; 46 } stack_start; 47 48 struct smp_ops { 49 void (*smp_prepare_boot_cpu)(void); 50 void (*smp_prepare_cpus)(unsigned max_cpus); 51 void (*smp_cpus_done)(unsigned max_cpus); 52 53 void (*stop_other_cpus)(int wait); 54 void (*smp_send_reschedule)(int cpu); 55 56 int (*cpu_up)(unsigned cpu); 57 int (*cpu_disable)(void); 58 void (*cpu_die)(unsigned int cpu); 59 void (*play_dead)(void); 60 61 void (*send_call_func_ipi)(const struct cpumask *mask); 62 void (*send_call_func_single_ipi)(int cpu); 63 }; 64 65 /* Globals due to paravirt */ 66 extern void set_cpu_sibling_map(int cpu); 67 68 #ifdef CONFIG_SMP 69 #ifndef CONFIG_PARAVIRT 70 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0) 71 #endif 72 extern struct smp_ops smp_ops; 73 74 static inline void smp_send_stop(void) 75 { 76 smp_ops.stop_other_cpus(0); 77 } 78 79 static inline void stop_other_cpus(void) 80 { 81 smp_ops.stop_other_cpus(1); 82 } 83 84 static inline void smp_prepare_boot_cpu(void) 85 { 86 smp_ops.smp_prepare_boot_cpu(); 87 } 88 89 static inline void smp_prepare_cpus(unsigned int max_cpus) 90 { 91 smp_ops.smp_prepare_cpus(max_cpus); 92 } 93 94 static inline void smp_cpus_done(unsigned int max_cpus) 95 { 96 smp_ops.smp_cpus_done(max_cpus); 97 } 98 99 static inline int __cpu_up(unsigned int cpu) 100 { 101 return smp_ops.cpu_up(cpu); 102 } 103 104 static inline int __cpu_disable(void) 105 { 106 return smp_ops.cpu_disable(); 107 } 108 109 static inline void __cpu_die(unsigned int cpu) 110 { 111 smp_ops.cpu_die(cpu); 112 } 113 114 static inline void play_dead(void) 115 { 116 smp_ops.play_dead(); 117 } 118 119 static inline void smp_send_reschedule(int cpu) 120 { 121 smp_ops.smp_send_reschedule(cpu); 122 } 123 124 static inline void arch_send_call_function_single_ipi(int cpu) 125 { 126 smp_ops.send_call_func_single_ipi(cpu); 127 } 128 129 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 130 { 131 smp_ops.send_call_func_ipi(mask); 132 } 133 134 void cpu_disable_common(void); 135 void native_smp_prepare_boot_cpu(void); 136 void native_smp_prepare_cpus(unsigned int max_cpus); 137 void native_smp_cpus_done(unsigned int max_cpus); 138 int native_cpu_up(unsigned int cpunum); 139 int native_cpu_disable(void); 140 void native_cpu_die(unsigned int cpu); 141 void native_play_dead(void); 142 void play_dead_common(void); 143 void wbinvd_on_cpu(int cpu); 144 int wbinvd_on_all_cpus(void); 145 146 void native_send_call_func_ipi(const struct cpumask *mask); 147 void native_send_call_func_single_ipi(int cpu); 148 149 void smp_store_cpu_info(int id); 150 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 151 152 /* We don't mark CPUs online until __cpu_up(), so we need another measure */ 153 static inline int num_booting_cpus(void) 154 { 155 return cpumask_weight(cpu_callout_mask); 156 } 157 #else /* !CONFIG_SMP */ 158 #define wbinvd_on_cpu(cpu) wbinvd() 159 static inline int wbinvd_on_all_cpus(void) 160 { 161 wbinvd(); 162 return 0; 163 } 164 #endif /* CONFIG_SMP */ 165 166 extern unsigned disabled_cpus __cpuinitdata; 167 168 #ifdef CONFIG_X86_32_SMP 169 /* 170 * This function is needed by all SMP systems. It must _always_ be valid 171 * from the initial startup. We map APIC_BASE very early in page_setup(), 172 * so this is correct in the x86 case. 173 */ 174 #define raw_smp_processor_id() (percpu_read(cpu_number)) 175 extern int safe_smp_processor_id(void); 176 177 #elif defined(CONFIG_X86_64_SMP) 178 #define raw_smp_processor_id() (percpu_read(cpu_number)) 179 180 #define stack_smp_processor_id() \ 181 ({ \ 182 struct thread_info *ti; \ 183 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ 184 ti->cpu; \ 185 }) 186 #define safe_smp_processor_id() smp_processor_id() 187 188 #endif 189 190 #ifdef CONFIG_X86_LOCAL_APIC 191 192 #ifndef CONFIG_X86_64 193 static inline int logical_smp_processor_id(void) 194 { 195 /* we don't want to mark this access volatile - bad code generation */ 196 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); 197 } 198 199 #endif 200 201 extern int hard_smp_processor_id(void); 202 203 #else /* CONFIG_X86_LOCAL_APIC */ 204 205 # ifndef CONFIG_SMP 206 # define hard_smp_processor_id() 0 207 # endif 208 209 #endif /* CONFIG_X86_LOCAL_APIC */ 210 211 #endif /* __ASSEMBLY__ */ 212 #endif /* _ASM_X86_SMP_H */ 213