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 /* Static state in head.S used to set up a CPU */ 43 extern unsigned long stack_start; /* Initial stack pointer address */ 44 45 struct task_struct; 46 47 struct smp_ops { 48 void (*smp_prepare_boot_cpu)(void); 49 void (*smp_prepare_cpus)(unsigned max_cpus); 50 void (*smp_cpus_done)(unsigned max_cpus); 51 52 void (*stop_other_cpus)(int wait); 53 void (*smp_send_reschedule)(int cpu); 54 55 int (*cpu_up)(unsigned cpu, struct task_struct *tidle); 56 int (*cpu_disable)(void); 57 void (*cpu_die)(unsigned int cpu); 58 void (*play_dead)(void); 59 60 void (*send_call_func_ipi)(const struct cpumask *mask); 61 void (*send_call_func_single_ipi)(int cpu); 62 }; 63 64 /* Globals due to paravirt */ 65 extern void set_cpu_sibling_map(int cpu); 66 67 #ifdef CONFIG_SMP 68 extern struct smp_ops smp_ops; 69 70 static inline void smp_send_stop(void) 71 { 72 smp_ops.stop_other_cpus(0); 73 } 74 75 static inline void stop_other_cpus(void) 76 { 77 smp_ops.stop_other_cpus(1); 78 } 79 80 static inline void smp_prepare_boot_cpu(void) 81 { 82 smp_ops.smp_prepare_boot_cpu(); 83 } 84 85 static inline void smp_prepare_cpus(unsigned int max_cpus) 86 { 87 smp_ops.smp_prepare_cpus(max_cpus); 88 } 89 90 static inline void smp_cpus_done(unsigned int max_cpus) 91 { 92 smp_ops.smp_cpus_done(max_cpus); 93 } 94 95 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle) 96 { 97 return smp_ops.cpu_up(cpu, tidle); 98 } 99 100 static inline int __cpu_disable(void) 101 { 102 return smp_ops.cpu_disable(); 103 } 104 105 static inline void __cpu_die(unsigned int cpu) 106 { 107 smp_ops.cpu_die(cpu); 108 } 109 110 static inline void play_dead(void) 111 { 112 smp_ops.play_dead(); 113 } 114 115 static inline void smp_send_reschedule(int cpu) 116 { 117 smp_ops.smp_send_reschedule(cpu); 118 } 119 120 static inline void arch_send_call_function_single_ipi(int cpu) 121 { 122 smp_ops.send_call_func_single_ipi(cpu); 123 } 124 125 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 126 { 127 smp_ops.send_call_func_ipi(mask); 128 } 129 130 void cpu_disable_common(void); 131 void native_smp_prepare_boot_cpu(void); 132 void native_smp_prepare_cpus(unsigned int max_cpus); 133 void native_smp_cpus_done(unsigned int max_cpus); 134 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 135 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle); 136 int native_cpu_disable(void); 137 int common_cpu_die(unsigned int cpu); 138 void native_cpu_die(unsigned int cpu); 139 void hlt_play_dead(void); 140 void native_play_dead(void); 141 void play_dead_common(void); 142 void wbinvd_on_cpu(int cpu); 143 int wbinvd_on_all_cpus(void); 144 145 void native_send_call_func_ipi(const struct cpumask *mask); 146 void native_send_call_func_single_ipi(int cpu); 147 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle); 148 149 void smp_store_boot_cpu_info(void); 150 void smp_store_cpu_info(int id); 151 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 152 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 153 154 #else /* !CONFIG_SMP */ 155 #define wbinvd_on_cpu(cpu) wbinvd() 156 static inline int wbinvd_on_all_cpus(void) 157 { 158 wbinvd(); 159 return 0; 160 } 161 #define smp_num_siblings 1 162 #endif /* CONFIG_SMP */ 163 164 extern unsigned disabled_cpus; 165 166 #ifdef CONFIG_X86_32_SMP 167 /* 168 * This function is needed by all SMP systems. It must _always_ be valid 169 * from the initial startup. We map APIC_BASE very early in page_setup(), 170 * so this is correct in the x86 case. 171 */ 172 #define raw_smp_processor_id() (this_cpu_read(cpu_number)) 173 extern int safe_smp_processor_id(void); 174 175 #elif defined(CONFIG_X86_64_SMP) 176 #define raw_smp_processor_id() (this_cpu_read(cpu_number)) 177 178 #define safe_smp_processor_id() smp_processor_id() 179 180 #endif 181 182 #ifdef CONFIG_X86_LOCAL_APIC 183 184 #ifndef CONFIG_X86_64 185 static inline int logical_smp_processor_id(void) 186 { 187 /* we don't want to mark this access volatile - bad code generation */ 188 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); 189 } 190 191 #endif 192 193 extern int hard_smp_processor_id(void); 194 195 #else /* CONFIG_X86_LOCAL_APIC */ 196 197 # ifndef CONFIG_SMP 198 # define hard_smp_processor_id() 0 199 # endif 200 201 #endif /* CONFIG_X86_LOCAL_APIC */ 202 203 #ifdef CONFIG_DEBUG_NMI_SELFTEST 204 extern void nmi_selftest(void); 205 #else 206 #define nmi_selftest() do { } while (0) 207 #endif 208 209 #endif /* __ASSEMBLY__ */ 210 #endif /* _ASM_X86_SMP_H */ 211