#ifndef _ASM_X86_SMP_H #define _ASM_X86_SMP_H #ifndef __ASSEMBLY__ #include <linux/cpumask.h> #include <linux/init.h> #include <asm/percpu.h> /* * We need the APIC definitions automatically as part of 'smp.h' */ #ifdef CONFIG_X86_LOCAL_APIC # include <asm/mpspec.h> # include <asm/apic.h> # ifdef CONFIG_X86_IO_APIC # include <asm/io_apic.h> # endif #endif #include <asm/thread_info.h> #include <asm/cpumask.h> extern int smp_num_siblings; extern unsigned int num_processors; DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); DECLARE_PER_CPU(u16, cpu_llc_id); DECLARE_PER_CPU(int, cpu_number); static inline struct cpumask *cpu_sibling_mask(int cpu) { return per_cpu(cpu_sibling_map, cpu); } static inline struct cpumask *cpu_core_mask(int cpu) { return per_cpu(cpu_core_map, cpu); } DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid); DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid); /* Static state in head.S used to set up a CPU */ extern struct { void *sp; unsigned short ss; } stack_start; struct smp_ops { void (*smp_prepare_boot_cpu)(void); void (*smp_prepare_cpus)(unsigned max_cpus); void (*smp_cpus_done)(unsigned max_cpus); void (*smp_send_stop)(void); void (*smp_send_reschedule)(int cpu); int (*cpu_up)(unsigned cpu); int (*cpu_disable)(void); void (*cpu_die)(unsigned int cpu); void (*play_dead)(void); void (*send_call_func_ipi)(const struct cpumask *mask); void (*send_call_func_single_ipi)(int cpu); }; /* Globals due to paravirt */ extern void set_cpu_sibling_map(int cpu); #ifdef CONFIG_SMP #ifndef CONFIG_PARAVIRT #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0) #endif extern struct smp_ops smp_ops; static inline void smp_send_stop(void) { smp_ops.smp_send_stop(); } static inline void smp_prepare_boot_cpu(void) { smp_ops.smp_prepare_boot_cpu(); } static inline void smp_prepare_cpus(unsigned int max_cpus) { smp_ops.smp_prepare_cpus(max_cpus); } static inline void smp_cpus_done(unsigned int max_cpus) { smp_ops.smp_cpus_done(max_cpus); } static inline int __cpu_up(unsigned int cpu) { return smp_ops.cpu_up(cpu); } static inline int __cpu_disable(void) { return smp_ops.cpu_disable(); } static inline void __cpu_die(unsigned int cpu) { smp_ops.cpu_die(cpu); } static inline void play_dead(void) { smp_ops.play_dead(); } static inline void smp_send_reschedule(int cpu) { smp_ops.smp_send_reschedule(cpu); } static inline void arch_send_call_function_single_ipi(int cpu) { smp_ops.send_call_func_single_ipi(cpu); } #define arch_send_call_function_ipi_mask arch_send_call_function_ipi_mask static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) { smp_ops.send_call_func_ipi(mask); } void cpu_disable_common(void); void native_smp_prepare_boot_cpu(void); void native_smp_prepare_cpus(unsigned int max_cpus); void native_smp_cpus_done(unsigned int max_cpus); int native_cpu_up(unsigned int cpunum); int native_cpu_disable(void); void native_cpu_die(unsigned int cpu); void native_play_dead(void); void play_dead_common(void); void native_send_call_func_ipi(const struct cpumask *mask); void native_send_call_func_single_ipi(int cpu); void smp_store_cpu_info(int id); #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) /* We don't mark CPUs online until __cpu_up(), so we need another measure */ static inline int num_booting_cpus(void) { return cpumask_weight(cpu_callout_mask); } #endif /* CONFIG_SMP */ extern unsigned disabled_cpus __cpuinitdata; #ifdef CONFIG_X86_32_SMP /* * This function is needed by all SMP systems. It must _always_ be valid * from the initial startup. We map APIC_BASE very early in page_setup(), * so this is correct in the x86 case. */ #define raw_smp_processor_id() (percpu_read(cpu_number)) extern int safe_smp_processor_id(void); #elif defined(CONFIG_X86_64_SMP) #define raw_smp_processor_id() (percpu_read(cpu_number)) #define stack_smp_processor_id() \ ({ \ struct thread_info *ti; \ __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \ ti->cpu; \ }) #define safe_smp_processor_id() smp_processor_id() #endif #ifdef CONFIG_X86_LOCAL_APIC #ifndef CONFIG_X86_64 static inline int logical_smp_processor_id(void) { /* we don't want to mark this access volatile - bad code generation */ return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR)); } #endif extern int hard_smp_processor_id(void); #else /* CONFIG_X86_LOCAL_APIC */ # ifndef CONFIG_SMP # define hard_smp_processor_id() 0 # endif #endif /* CONFIG_X86_LOCAL_APIC */ #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_SMP_H */