#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/pda.h> #include <asm/thread_info.h> extern cpumask_t cpu_callout_map; extern cpumask_t cpu_initialized; extern cpumask_t cpu_callin_map; extern void (*mtrr_hook)(void); extern void zap_low_mappings(void); extern int smp_num_siblings; extern unsigned int num_processors; extern cpumask_t cpu_initialized; #ifdef CONFIG_SMP extern u16 x86_cpu_to_apicid_init[]; extern u16 x86_bios_cpu_apicid_init[]; extern void *x86_cpu_to_apicid_early_ptr; extern void *x86_bios_cpu_apicid_early_ptr; #else #define x86_cpu_to_apicid_early_ptr NULL #define x86_bios_cpu_apicid_early_ptr NULL #endif DECLARE_PER_CPU(cpumask_t, cpu_sibling_map); DECLARE_PER_CPU(cpumask_t, cpu_core_map); DECLARE_PER_CPU(u16, cpu_llc_id); DECLARE_PER_CPU(u16, x86_cpu_to_apicid); DECLARE_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); int (*cpu_up)(unsigned cpu); void (*smp_cpus_done)(unsigned max_cpus); void (*smp_send_stop)(void); void (*smp_send_reschedule)(int cpu); int (*smp_call_function_mask)(cpumask_t mask, void (*func)(void *info), void *info, int wait); }; /* 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 void smp_send_reschedule(int cpu) { smp_ops.smp_send_reschedule(cpu); } static inline int smp_call_function_mask(cpumask_t mask, void (*func) (void *info), void *info, int wait) { return smp_ops.smp_call_function_mask(mask, func, info, wait); } 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); extern int __cpu_disable(void); extern void __cpu_die(unsigned int cpu); extern void prefill_possible_map(void); 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 cpus_weight(cpu_callout_map); } #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. */ DECLARE_PER_CPU(int, cpu_number); #define raw_smp_processor_id() (x86_read_percpu(cpu_number)) extern int safe_smp_processor_id(void); #elif defined(CONFIG_X86_64_SMP) #define raw_smp_processor_id() read_pda(cpunumber) #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() #else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */ #define cpu_physical_id(cpu) boot_cpu_physical_apicid #define safe_smp_processor_id() 0 #define stack_smp_processor_id() 0 #endif #ifdef CONFIG_X86_LOCAL_APIC 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(*(u32 *)(APIC_BASE + APIC_LDR)); } #ifndef CONFIG_X86_64 static inline unsigned int read_apic_id(void) { return *(u32 *)(APIC_BASE + APIC_ID); } #else extern unsigned int read_apic_id(void); #endif # ifdef APIC_DEFINITION extern int hard_smp_processor_id(void); # else # include <mach_apicdef.h> static inline int hard_smp_processor_id(void) { /* we don't want to mark this access volatile - bad code generation */ return GET_APIC_ID(read_apic_id()); } # endif /* APIC_DEFINITION */ #else /* CONFIG_X86_LOCAL_APIC */ # ifndef CONFIG_SMP # define hard_smp_processor_id() 0 # endif #endif /* CONFIG_X86_LOCAL_APIC */ #ifdef CONFIG_HOTPLUG_CPU extern void cpu_exit_clear(void); extern void cpu_uninit(void); #endif extern void smp_alloc_memory(void); extern void lock_ipi_call_lock(void); extern void unlock_ipi_call_lock(void); #endif /* __ASSEMBLY__ */ #endif