209 lines
5.0 KiB
C
209 lines
5.0 KiB
C
#ifndef _ASM_X86_SMP_H_
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#define _ASM_X86_SMP_H_
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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#include <linux/init.h>
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#include <asm/percpu.h>
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/*
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* We need the APIC definitions automatically as part of 'smp.h'
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*/
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#ifdef CONFIG_X86_LOCAL_APIC
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# include <asm/mpspec.h>
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# include <asm/apic.h>
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# ifdef CONFIG_X86_IO_APIC
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# include <asm/io_apic.h>
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# endif
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#endif
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#include <asm/pda.h>
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#include <asm/thread_info.h>
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extern cpumask_t cpu_callout_map;
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extern cpumask_t cpu_initialized;
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extern cpumask_t cpu_callin_map;
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extern void (*mtrr_hook)(void);
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extern void zap_low_mappings(void);
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extern int smp_num_siblings;
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extern unsigned int num_processors;
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extern cpumask_t cpu_initialized;
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#ifdef CONFIG_SMP
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extern u16 x86_cpu_to_apicid_init[];
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extern u16 x86_bios_cpu_apicid_init[];
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extern void *x86_cpu_to_apicid_early_ptr;
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extern void *x86_bios_cpu_apicid_early_ptr;
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#else
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#define x86_cpu_to_apicid_early_ptr NULL
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#define x86_bios_cpu_apicid_early_ptr NULL
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#endif
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DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
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DECLARE_PER_CPU(cpumask_t, cpu_core_map);
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DECLARE_PER_CPU(u16, cpu_llc_id);
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DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
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DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
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/* Static state in head.S used to set up a CPU */
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extern struct {
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void *sp;
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unsigned short ss;
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} stack_start;
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struct smp_ops {
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void (*smp_prepare_boot_cpu)(void);
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void (*smp_prepare_cpus)(unsigned max_cpus);
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int (*cpu_up)(unsigned cpu);
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void (*smp_cpus_done)(unsigned max_cpus);
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void (*smp_send_stop)(void);
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void (*smp_send_reschedule)(int cpu);
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int (*smp_call_function_mask)(cpumask_t mask,
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void (*func)(void *info), void *info,
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int wait);
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};
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/* Globals due to paravirt */
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extern void set_cpu_sibling_map(int cpu);
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#ifdef CONFIG_SMP
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#ifndef CONFIG_PARAVIRT
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#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
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#endif
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extern struct smp_ops smp_ops;
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static inline void smp_send_stop(void)
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{
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smp_ops.smp_send_stop();
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}
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static inline void smp_prepare_boot_cpu(void)
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{
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smp_ops.smp_prepare_boot_cpu();
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}
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static inline void smp_prepare_cpus(unsigned int max_cpus)
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{
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smp_ops.smp_prepare_cpus(max_cpus);
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}
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static inline void smp_cpus_done(unsigned int max_cpus)
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{
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smp_ops.smp_cpus_done(max_cpus);
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}
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static inline int __cpu_up(unsigned int cpu)
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{
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return smp_ops.cpu_up(cpu);
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}
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static inline void smp_send_reschedule(int cpu)
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{
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smp_ops.smp_send_reschedule(cpu);
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}
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static inline int smp_call_function_mask(cpumask_t mask,
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void (*func) (void *info), void *info,
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int wait)
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{
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return smp_ops.smp_call_function_mask(mask, func, info, wait);
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}
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void native_smp_prepare_boot_cpu(void);
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void native_smp_prepare_cpus(unsigned int max_cpus);
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void native_smp_cpus_done(unsigned int max_cpus);
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int native_cpu_up(unsigned int cpunum);
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extern int __cpu_disable(void);
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extern void __cpu_die(unsigned int cpu);
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extern void prefill_possible_map(void);
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void smp_store_cpu_info(int id);
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#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
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/* We don't mark CPUs online until __cpu_up(), so we need another measure */
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static inline int num_booting_cpus(void)
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{
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return cpus_weight(cpu_callout_map);
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}
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#endif /* CONFIG_SMP */
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extern unsigned disabled_cpus __cpuinitdata;
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#ifdef CONFIG_X86_32_SMP
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/*
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* This function is needed by all SMP systems. It must _always_ be valid
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* from the initial startup. We map APIC_BASE very early in page_setup(),
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* so this is correct in the x86 case.
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*/
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DECLARE_PER_CPU(int, cpu_number);
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#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
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extern int safe_smp_processor_id(void);
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#elif defined(CONFIG_X86_64_SMP)
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#define raw_smp_processor_id() read_pda(cpunumber)
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#define stack_smp_processor_id() \
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({ \
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struct thread_info *ti; \
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__asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
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ti->cpu; \
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})
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#define safe_smp_processor_id() smp_processor_id()
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#else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
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#define cpu_physical_id(cpu) boot_cpu_physical_apicid
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#define safe_smp_processor_id() 0
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#define stack_smp_processor_id() 0
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#endif
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#ifdef CONFIG_X86_LOCAL_APIC
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static inline int logical_smp_processor_id(void)
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{
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/* we don't want to mark this access volatile - bad code generation */
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return GET_APIC_LOGICAL_ID(*(u32 *)(APIC_BASE + APIC_LDR));
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}
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#ifndef CONFIG_X86_64
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static inline unsigned int read_apic_id(void)
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{
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return *(u32 *)(APIC_BASE + APIC_ID);
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}
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#else
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extern unsigned int read_apic_id(void);
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#endif
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# ifdef APIC_DEFINITION
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extern int hard_smp_processor_id(void);
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# else
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# include <mach_apicdef.h>
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static inline int hard_smp_processor_id(void)
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{
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/* we don't want to mark this access volatile - bad code generation */
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return GET_APIC_ID(read_apic_id());
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}
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# endif /* APIC_DEFINITION */
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#else /* CONFIG_X86_LOCAL_APIC */
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# ifndef CONFIG_SMP
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# define hard_smp_processor_id() 0
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# endif
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#endif /* CONFIG_X86_LOCAL_APIC */
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#ifdef CONFIG_HOTPLUG_CPU
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extern void cpu_exit_clear(void);
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extern void cpu_uninit(void);
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#endif
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extern void smp_alloc_memory(void);
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extern void lock_ipi_call_lock(void);
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extern void unlock_ipi_call_lock(void);
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#endif /* __ASSEMBLY__ */
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#endif
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