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_t, cpu_sibling_map); 25 DECLARE_PER_CPU(cpumask_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(cpumask_t 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); 138 139 void native_send_call_func_ipi(const struct cpumask *mask); 140 void native_send_call_func_single_ipi(int cpu); 141 142 void smp_store_cpu_info(int id); 143 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 144 145 /* We don't mark CPUs online until __cpu_up(), so we need another measure */ 146 static inline int num_booting_cpus(void) 147 { 148 return cpumask_weight(cpu_callout_mask); 149 } 150 #endif /* CONFIG_SMP */ 151 152 extern unsigned disabled_cpus __cpuinitdata; 153 154 #ifdef CONFIG_X86_32_SMP 155 /* 156 * This function is needed by all SMP systems. It must _always_ be valid 157 * from the initial startup. We map APIC_BASE very early in page_setup(), 158 * so this is correct in the x86 case. 159 */ 160 #define raw_smp_processor_id() (percpu_read(cpu_number)) 161 extern int safe_smp_processor_id(void); 162 163 #elif defined(CONFIG_X86_64_SMP) 164 #define raw_smp_processor_id() (percpu_read(cpu_number)) 165 166 #define stack_smp_processor_id() \ 167 ({ \ 168 struct thread_info *ti; \ 169 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ 170 ti->cpu; \ 171 }) 172 #define safe_smp_processor_id() smp_processor_id() 173 174 #endif 175 176 #ifdef CONFIG_X86_LOCAL_APIC 177 178 #ifndef CONFIG_X86_64 179 static inline int logical_smp_processor_id(void) 180 { 181 /* we don't want to mark this access volatile - bad code generation */ 182 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR)); 183 } 184 185 #endif 186 187 extern int hard_smp_processor_id(void); 188 189 #else /* CONFIG_X86_LOCAL_APIC */ 190 191 # ifndef CONFIG_SMP 192 # define hard_smp_processor_id() 0 193 # endif 194 195 #endif /* CONFIG_X86_LOCAL_APIC */ 196 197 #endif /* __ASSEMBLY__ */ 198 #endif /* _ASM_X86_SMP_H */ 199