smp.h 4.7 KB
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#ifndef _ASM_X86_SMP_H_
#define _ASM_X86_SMP_H_
#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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/*
 * 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>

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extern cpumask_t cpu_callout_map;
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extern cpumask_t cpu_initialized;
extern cpumask_t cpu_callin_map;

extern void (*mtrr_hook)(void);
extern void zap_low_mappings(void);
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extern int smp_num_siblings;
extern unsigned int num_processors;
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extern cpumask_t cpu_initialized;
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DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
DECLARE_PER_CPU(cpumask_t, cpu_core_map);
DECLARE_PER_CPU(u16, cpu_llc_id);
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DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
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/* Static state in head.S used to set up a CPU */
extern struct {
	void *sp;
	unsigned short ss;
} stack_start;

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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);
};

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/* Globals due to paravirt */
extern void set_cpu_sibling_map(int cpu);

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#ifdef CONFIG_SMP
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#ifndef CONFIG_PARAVIRT
#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
#endif
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extern struct smp_ops smp_ops;
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static inline void smp_send_stop(void)
{
	smp_ops.smp_send_stop();
}

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static inline void smp_prepare_boot_cpu(void)
{
	smp_ops.smp_prepare_boot_cpu();
}

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static inline void smp_prepare_cpus(unsigned int max_cpus)
{
	smp_ops.smp_prepare_cpus(max_cpus);
}

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static inline void smp_cpus_done(unsigned int max_cpus)
{
	smp_ops.smp_cpus_done(max_cpus);
}

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static inline int __cpu_up(unsigned int cpu)
{
	return smp_ops.cpu_up(cpu);
}

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static inline void smp_send_reschedule(int cpu)
{
	smp_ops.smp_send_reschedule(cpu);
}
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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);
}
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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);
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 */
static inline int num_booting_cpus(void)
{
	return cpus_weight(cpu_callout_map);
}
#endif /* CONFIG_SMP */

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extern unsigned disabled_cpus __cpuinitdata;

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#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 */
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#define cpu_physical_id(cpu)		boot_cpu_physical_apicid
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#define safe_smp_processor_id()		0
#define stack_smp_processor_id() 	0
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#endif
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#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));
}

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#ifndef CONFIG_X86_64
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static inline unsigned int read_apic_id(void)
{
	return *(u32 *)(APIC_BASE + APIC_ID);
}
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#else
extern unsigned int read_apic_id(void);
#endif

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# 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 */
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	return GET_APIC_ID(read_apic_id());
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}
# endif /* APIC_DEFINITION */

#else /* CONFIG_X86_LOCAL_APIC */

# ifndef CONFIG_SMP
#  define hard_smp_processor_id()	0
# endif

#endif /* CONFIG_X86_LOCAL_APIC */

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#ifdef CONFIG_HOTPLUG_CPU
extern void cpu_uninit(void);
#endif

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extern void lock_ipi_call_lock(void);
extern void unlock_ipi_call_lock(void);
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#endif /* __ASSEMBLY__ */
#endif