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 (*smp_send_stop)(void); 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.smp_send_stop(); 77 } 78 79 static inline void smp_prepare_boot_cpu(void) 80 { 81 smp_ops.smp_prepare_boot_cpu(); 82 } 83 84 static inline void smp_prepare_cpus(unsigned int max_cpus) 85 { 86 smp_ops.smp_prepare_cpus(max_cpus); 87 } 88 89 static inline void smp_cpus_done(unsigned int max_cpus) 90 { 91 smp_ops.smp_cpus_done(max_cpus); 92 } 93 94 static inline int __cpu_up(unsigned int cpu) 95 { 96 return smp_ops.cpu_up(cpu); 97 } 98 99 static inline int __cpu_disable(void) 100 { 101 return smp_ops.cpu_disable(); 102 } 103 104 static inline void __cpu_die(unsigned int cpu) 105 { 106 smp_ops.cpu_die(cpu); 107 } 108 109 static inline void play_dead(void) 110 { 111 smp_ops.play_dead(); 112 } 113 114 static inline void smp_send_reschedule(int cpu) 115 { 116 smp_ops.smp_send_reschedule(cpu); 117 } 118 119 static inline void arch_send_call_function_single_ipi(int cpu) 120 { 121 smp_ops.send_call_func_single_ipi(cpu); 122 } 123 124 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 125 { 126 smp_ops.send_call_func_ipi(mask); 127 } 128 129 void cpu_disable_common(void); 130 void native_smp_prepare_boot_cpu(void); 131 void native_smp_prepare_cpus(unsigned int max_cpus); 132 void native_smp_cpus_done(unsigned int max_cpus); 133 int native_cpu_up(unsigned int cpunum); 134 int native_cpu_disable(void); 135 void native_cpu_die(unsigned int cpu); 136 void native_play_dead(void); 137 void play_dead_common(void); 138 void wbinvd_on_cpu(int cpu); 139 int wbinvd_on_all_cpus(void); 140 141 void native_send_call_func_ipi(const struct cpumask *mask); 142 void native_send_call_func_single_ipi(int cpu); 143 144 void smp_store_cpu_info(int id); 145 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 146 147 /* We don't mark CPUs online until __cpu_up(), so we need another measure */ 148 static inline int num_booting_cpus(void) 149 { 150 return cpumask_weight(cpu_callout_mask); 151 } 152 #else /* !CONFIG_SMP */ 153 #define wbinvd_on_cpu(cpu) wbinvd() 154 static inline int wbinvd_on_all_cpus(void) 155 { 156 wbinvd(); 157 return 0; 158 } 159 #endif /* CONFIG_SMP */ 160 161 extern unsigned disabled_cpus __cpuinitdata; 162 163 #ifdef CONFIG_X86_32_SMP 164 /* 165 * This function is needed by all SMP systems. It must _always_ be valid 166 * from the initial startup. We map APIC_BASE very early in page_setup(), 167 * so this is correct in the x86 case. 168 */ 169 #define raw_smp_processor_id() (percpu_read(cpu_number)) 170 extern int safe_smp_processor_id(void); 171 172 #elif defined(CONFIG_X86_64_SMP) 173 #define raw_smp_processor_id() (percpu_read(cpu_number)) 174 175 #define stack_smp_processor_id() \ 176 ({ \ 177 struct thread_info *ti; \ 178 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ 179 ti->cpu; \ 180 }) 181 #define safe_smp_processor_id() smp_processor_id() 182 183 #endif 184 185 #ifdef CONFIG_X86_LOCAL_APIC 186 187 #ifndef CONFIG_X86_64 188 static inline int logical_smp_processor_id(void) 189 { 190 /* we don't want to mark this access volatile - bad code generation */ 191 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); 192 } 193 194 #endif 195 196 extern int hard_smp_processor_id(void); 197 198 #else /* CONFIG_X86_LOCAL_APIC */ 199 200 # ifndef CONFIG_SMP 201 # define hard_smp_processor_id() 0 202 # endif 203 204 #endif /* CONFIG_X86_LOCAL_APIC */ 205 206 #endif /* __ASSEMBLY__ */ 207 #endif /* _ASM_X86_SMP_H */ 208