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 (*smp_send_reschedule)(int cpu); 51 52 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 53 int (*cpu_disable)(void); 54 void (*cpu_die)(unsigned int cpu); 55 void (*play_dead)(void); 56 57 void (*send_call_func_ipi)(const struct cpumask *mask); 58 void (*send_call_func_single_ipi)(int cpu); 59 }; 60 61 /* Globals due to paravirt */ 62 extern void set_cpu_sibling_map(int cpu); 63 64 #ifdef CONFIG_SMP 65 extern struct smp_ops smp_ops; 66 67 static inline void smp_send_stop(void) 68 { 69 smp_ops.stop_other_cpus(0); 70 } 71 72 static inline void stop_other_cpus(void) 73 { 74 smp_ops.stop_other_cpus(1); 75 } 76 77 static inline void smp_prepare_boot_cpu(void) 78 { 79 smp_ops.smp_prepare_boot_cpu(); 80 } 81 82 static inline void smp_prepare_cpus(unsigned int max_cpus) 83 { 84 smp_ops.smp_prepare_cpus(max_cpus); 85 } 86 87 static inline void smp_cpus_done(unsigned int max_cpus) 88 { 89 smp_ops.smp_cpus_done(max_cpus); 90 } 91 92 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 93 { 94 return smp_ops.cpu_up(cpu, tidle); 95 } 96 97 static inline int __cpu_disable(void) 98 { 99 return smp_ops.cpu_disable(); 100 } 101 102 static inline void __cpu_die(unsigned int cpu) 103 { 104 smp_ops.cpu_die(cpu); 105 } 106 107 static inline void play_dead(void) 108 { 109 smp_ops.play_dead(); 110 } 111 112 static inline void smp_send_reschedule(int cpu) 113 { 114 smp_ops.smp_send_reschedule(cpu); 115 } 116 117 static inline void arch_send_call_function_single_ipi(int cpu) 118 { 119 smp_ops.send_call_func_single_ipi(cpu); 120 } 121 122 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 123 { 124 smp_ops.send_call_func_ipi(mask); 125 } 126 127 void cpu_disable_common(void); 128 void native_smp_prepare_boot_cpu(void); 129 void native_smp_prepare_cpus(unsigned int max_cpus); 130 void native_smp_cpus_done(unsigned int max_cpus); 131 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 132 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 133 int native_cpu_disable(void); 134 int common_cpu_die(unsigned int cpu); 135 void native_cpu_die(unsigned int cpu); 136 void hlt_play_dead(void); 137 void native_play_dead(void); 138 void play_dead_common(void); 139 void wbinvd_on_cpu(int cpu); 140 int wbinvd_on_all_cpus(void); 141 142 void native_send_call_func_ipi(const struct cpumask *mask); 143 void native_send_call_func_single_ipi(int cpu); 144 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 145 146 void smp_store_boot_cpu_info(void); 147 void smp_store_cpu_info(int id); 148 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 149 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 150 151 #else /* !CONFIG_SMP */ 152 #define wbinvd_on_cpu(cpu) wbinvd() 153 static inline int wbinvd_on_all_cpus(void) 154 { 155 wbinvd(); 156 return 0; 157 } 158 #define smp_num_siblings 1 159 #endif /* CONFIG_SMP */ 160 161 extern unsigned disabled_cpus; 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() (this_cpu_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() (this_cpu_read(cpu_number)) 174 175 #define safe_smp_processor_id() smp_processor_id() 176 177 #endif 178 179 #ifdef CONFIG_X86_LOCAL_APIC 180 181 #ifndef CONFIG_X86_64 182 static inline int logical_smp_processor_id(void) 183 { 184 /* we don't want to mark this access volatile - bad code generation */ 185 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); 186 } 187 188 #endif 189 190 extern int hard_smp_processor_id(void); 191 192 #else /* CONFIG_X86_LOCAL_APIC */ 193 194 # ifndef CONFIG_SMP 195 # define hard_smp_processor_id() 0 196 # endif 197 198 #endif /* CONFIG_X86_LOCAL_APIC */ 199 200 #ifdef CONFIG_DEBUG_NMI_SELFTEST 201 extern void nmi_selftest(void); 202 #else 203 #define nmi_selftest() do { } while (0) 204 #endif 205 206 #endif /* __ASSEMBLY__ */ 207 #endif /* _ASM_X86_SMP_H */ 208