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/pda.h> 19 #include <asm/thread_info.h> 20 21 extern cpumask_t cpu_callout_map; 22 extern cpumask_t cpu_initialized; 23 extern cpumask_t cpu_callin_map; 24 25 extern void (*mtrr_hook)(void); 26 extern void zap_low_mappings(void); 27 28 extern int __cpuinit get_local_pda(int cpu); 29 30 extern int smp_num_siblings; 31 extern unsigned int num_processors; 32 extern cpumask_t cpu_initialized; 33 34 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map); 35 DECLARE_PER_CPU(cpumask_t, cpu_core_map); 36 DECLARE_PER_CPU(u16, cpu_llc_id); 37 #ifdef CONFIG_X86_32 38 DECLARE_PER_CPU(int, cpu_number); 39 #endif 40 41 DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid); 42 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid); 43 44 /* Static state in head.S used to set up a CPU */ 45 extern struct { 46 void *sp; 47 unsigned short ss; 48 } stack_start; 49 50 struct smp_ops { 51 void (*smp_prepare_boot_cpu)(void); 52 void (*smp_prepare_cpus)(unsigned max_cpus); 53 void (*smp_cpus_done)(unsigned max_cpus); 54 55 void (*smp_send_stop)(void); 56 void (*smp_send_reschedule)(int cpu); 57 58 int (*cpu_up)(unsigned cpu); 59 int (*cpu_disable)(void); 60 void (*cpu_die)(unsigned int cpu); 61 void (*play_dead)(void); 62 63 void (*send_call_func_ipi)(cpumask_t mask); 64 void (*send_call_func_single_ipi)(int cpu); 65 }; 66 67 /* Globals due to paravirt */ 68 extern void set_cpu_sibling_map(int cpu); 69 70 #ifdef CONFIG_SMP 71 #ifndef CONFIG_PARAVIRT 72 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0) 73 #endif 74 extern struct smp_ops smp_ops; 75 76 static inline void smp_send_stop(void) 77 { 78 smp_ops.smp_send_stop(); 79 } 80 81 static inline void smp_prepare_boot_cpu(void) 82 { 83 smp_ops.smp_prepare_boot_cpu(); 84 } 85 86 static inline void smp_prepare_cpus(unsigned int max_cpus) 87 { 88 smp_ops.smp_prepare_cpus(max_cpus); 89 } 90 91 static inline void smp_cpus_done(unsigned int max_cpus) 92 { 93 smp_ops.smp_cpus_done(max_cpus); 94 } 95 96 static inline int __cpu_up(unsigned int cpu) 97 { 98 return smp_ops.cpu_up(cpu); 99 } 100 101 static inline int __cpu_disable(void) 102 { 103 return smp_ops.cpu_disable(); 104 } 105 106 static inline void __cpu_die(unsigned int cpu) 107 { 108 smp_ops.cpu_die(cpu); 109 } 110 111 static inline void play_dead(void) 112 { 113 smp_ops.play_dead(); 114 } 115 116 static inline void smp_send_reschedule(int cpu) 117 { 118 smp_ops.smp_send_reschedule(cpu); 119 } 120 121 static inline void arch_send_call_function_single_ipi(int cpu) 122 { 123 smp_ops.send_call_func_single_ipi(cpu); 124 } 125 126 static inline void arch_send_call_function_ipi(cpumask_t mask) 127 { 128 smp_ops.send_call_func_ipi(mask); 129 } 130 131 void cpu_disable_common(void); 132 void native_smp_prepare_boot_cpu(void); 133 void native_smp_prepare_cpus(unsigned int max_cpus); 134 void native_smp_cpus_done(unsigned int max_cpus); 135 int native_cpu_up(unsigned int cpunum); 136 int native_cpu_disable(void); 137 void native_cpu_die(unsigned int cpu); 138 void native_play_dead(void); 139 void play_dead_common(void); 140 141 void native_send_call_func_ipi(cpumask_t mask); 142 void native_send_call_func_single_ipi(int cpu); 143 144 extern void prefill_possible_map(void); 145 146 void smp_store_cpu_info(int id); 147 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 148 149 /* We don't mark CPUs online until __cpu_up(), so we need another measure */ 150 static inline int num_booting_cpus(void) 151 { 152 return cpus_weight(cpu_callout_map); 153 } 154 #else 155 static inline void prefill_possible_map(void) 156 { 157 } 158 #endif /* CONFIG_SMP */ 159 160 extern unsigned disabled_cpus __cpuinitdata; 161 162 #ifdef CONFIG_X86_32_SMP 163 /* 164 * This function is needed by all SMP systems. It must _always_ be valid 165 * from the initial startup. We map APIC_BASE very early in page_setup(), 166 * so this is correct in the x86 case. 167 */ 168 #define raw_smp_processor_id() (x86_read_percpu(cpu_number)) 169 extern int safe_smp_processor_id(void); 170 171 #elif defined(CONFIG_X86_64_SMP) 172 #define raw_smp_processor_id() read_pda(cpunumber) 173 174 #define stack_smp_processor_id() \ 175 ({ \ 176 struct thread_info *ti; \ 177 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ 178 ti->cpu; \ 179 }) 180 #define safe_smp_processor_id() smp_processor_id() 181 182 #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */ 183 #define cpu_physical_id(cpu) boot_cpu_physical_apicid 184 #define safe_smp_processor_id() 0 185 #define stack_smp_processor_id() 0 186 #endif 187 188 #ifdef CONFIG_X86_LOCAL_APIC 189 190 #ifndef CONFIG_X86_64 191 static inline int logical_smp_processor_id(void) 192 { 193 /* we don't want to mark this access volatile - bad code generation */ 194 return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR)); 195 } 196 197 #include <mach_apicdef.h> 198 static inline unsigned int read_apic_id(void) 199 { 200 unsigned int reg; 201 202 reg = *(u32 *)(APIC_BASE + APIC_ID); 203 204 return GET_APIC_ID(reg); 205 } 206 #endif 207 208 209 # if defined(APIC_DEFINITION) || defined(CONFIG_X86_64) 210 extern int hard_smp_processor_id(void); 211 # else 212 #include <mach_apicdef.h> 213 static inline int hard_smp_processor_id(void) 214 { 215 /* we don't want to mark this access volatile - bad code generation */ 216 return read_apic_id(); 217 } 218 # endif /* APIC_DEFINITION */ 219 220 #else /* CONFIG_X86_LOCAL_APIC */ 221 222 # ifndef CONFIG_SMP 223 # define hard_smp_processor_id() 0 224 # endif 225 226 #endif /* CONFIG_X86_LOCAL_APIC */ 227 228 #ifdef CONFIG_X86_HAS_BOOT_CPU_ID 229 extern unsigned char boot_cpu_id; 230 #else 231 #define boot_cpu_id 0 232 #endif 233 234 #endif /* __ASSEMBLY__ */ 235 #endif /* _ASM_X86_SMP_H */ 236