[linux-2.6-block.git] / include / asm-x86 / smp.h

#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);

	void (*send_call_func_ipi)(cpumask_t 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 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);
}

static inline void arch_send_call_function_ipi(cpumask_t mask)
{
	smp_ops.send_call_func_ipi(mask);
}

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);
void native_send_call_func_ipi(cpumask_t mask);
void native_send_call_func_single_ipi(int cpu);

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);
#endif /* __ASSEMBLY__ */
#endif
Commit	Line	Data
c27cfeff GC	1	#ifndef _ASM_X86_SMP_H_
	2	#define _ASM_X86_SMP_H_
	3	#ifndef __ASSEMBLY__
53ebef49	4	#include <linux/cpumask.h>
93b016f8	5	#include <linux/init.h>
7e1efc0c	6	#include <asm/percpu.h>
53ebef49	7
b23dab08 GC	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
53ebef49	21	extern cpumask_t cpu_callout_map;
8be9ac85 GC	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);
53ebef49 GC	27
	28	extern int smp_num_siblings;
	29	extern unsigned int num_processors;
cb3c8b90	30	extern cpumask_t cpu_initialized;
c27cfeff	31
b447a468	32	#ifdef CONFIG_SMP
7e1efc0c GOC	33	extern u16 x86_cpu_to_apicid_init[];
	34	extern u16 x86_bios_cpu_apicid_init[];
	35	extern void *x86_cpu_to_apicid_early_ptr;
	36	extern void *x86_bios_cpu_apicid_early_ptr;
b447a468 MT	37	#else
	38	#define x86_cpu_to_apicid_early_ptr NULL
	39	#define x86_bios_cpu_apicid_early_ptr NULL
	40	#endif
7e1efc0c GOC	41
	42	DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
	43	DECLARE_PER_CPU(cpumask_t, cpu_core_map);
	44	DECLARE_PER_CPU(u16, cpu_llc_id);
	45	DECLARE_PER_CPU(u16, x86_cpu_to_apicid);
	46	DECLARE_PER_CPU(u16, x86_bios_cpu_apicid);
	47
9d97d0da GOC	48	/* Static state in head.S used to set up a CPU */
	49	extern struct {
	50	void *sp;
	51	unsigned short ss;
	52	} stack_start;
	53
16694024 GC	54	struct smp_ops {
	55	void (*smp_prepare_boot_cpu)(void);
	56	void (*smp_prepare_cpus)(unsigned max_cpus);
	57	int (*cpu_up)(unsigned cpu);
	58	void (*smp_cpus_done)(unsigned max_cpus);
	59
	60	void (*smp_send_stop)(void);
	61	void (*smp_send_reschedule)(int cpu);
3b16cf87 JA	62
	63	void (*send_call_func_ipi)(cpumask_t mask);
	64	void (*send_call_func_single_ipi)(int cpu);
16694024 GC	65	};
16694024 GC	66
14522076 GC	67	/* Globals due to paravirt */
	68	extern void set_cpu_sibling_map(int cpu);
	69
c76cb368	70	#ifdef CONFIG_SMP
d0173aea GOC	71	#ifndef CONFIG_PARAVIRT
	72	#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
	73	#endif
c76cb368	74	extern struct smp_ops smp_ops;
8678969e	75
377d6984 GC	76	static inline void smp_send_stop(void)
	77	{
	78	smp_ops.smp_send_stop();
	79	}
	80
1e3fac83 GC	81	static inline void smp_prepare_boot_cpu(void)
	82	{
	83	smp_ops.smp_prepare_boot_cpu();
	84	}
	85
7557da67 GC	86	static inline void smp_prepare_cpus(unsigned int max_cpus)
	87	{
	88	smp_ops.smp_prepare_cpus(max_cpus);
	89	}
	90
c5597649 GC	91	static inline void smp_cpus_done(unsigned int max_cpus)
	92	{
	93	smp_ops.smp_cpus_done(max_cpus);
	94	}
	95
71d19549 GC	96	static inline int __cpu_up(unsigned int cpu)
	97	{
	98	return smp_ops.cpu_up(cpu);
	99	}
	100
8678969e GC	101	static inline void smp_send_reschedule(int cpu)
	102	{
	103	smp_ops.smp_send_reschedule(cpu);
	104	}
64b1a21e	105
3b16cf87 JA	106	static inline void arch_send_call_function_single_ipi(int cpu)
	107	{
	108	smp_ops.send_call_func_single_ipi(cpu);
	109	}
	110
	111	static inline void arch_send_call_function_ipi(cpumask_t mask)
64b1a21e	112	{
3b16cf87	113	smp_ops.send_call_func_ipi(mask);
64b1a21e	114	}
71d19549	115
1e3fac83	116	void native_smp_prepare_boot_cpu(void);
7557da67	117	void native_smp_prepare_cpus(unsigned int max_cpus);
c5597649	118	void native_smp_cpus_done(unsigned int max_cpus);
71d19549	119	int native_cpu_up(unsigned int cpunum);
3b16cf87 JA	120	void native_send_call_func_ipi(cpumask_t mask);
3b16cf87 JA	121	void native_send_call_func_single_ipi(int cpu);
93b016f8	122
69c18c15 GC	123	extern int __cpu_disable(void);
	124	extern void __cpu_die(unsigned int cpu);
	125
68a1c3f8	126	extern void prefill_possible_map(void);
91718e8d	127
1d89a7f0	128	void smp_store_cpu_info(int id);
c70dcb74	129	#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
a9c057c1 GC	130
	131	/* We don't mark CPUs online until __cpu_up(), so we need another measure */
	132	static inline int num_booting_cpus(void)
	133	{
	134	return cpus_weight(cpu_callout_map);
	135	}
	136	#endif /* CONFIG_SMP */
	137
2fe60147 AS	138	extern unsigned disabled_cpus __cpuinitdata;
2fe60147 AS	139
a9c057c1 GC	140	#ifdef CONFIG_X86_32_SMP
	141	/*
	142	* This function is needed by all SMP systems. It must _always_ be valid
	143	* from the initial startup. We map APIC_BASE very early in page_setup(),
	144	* so this is correct in the x86 case.
	145	*/
	146	DECLARE_PER_CPU(int, cpu_number);
	147	#define raw_smp_processor_id() (x86_read_percpu(cpu_number))
	148	extern int safe_smp_processor_id(void);
	149
	150	#elif defined(CONFIG_X86_64_SMP)
	151	#define raw_smp_processor_id() read_pda(cpunumber)
	152
	153	#define stack_smp_processor_id() \
	154	({ \
	155	struct thread_info *ti; \
	156	__asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
	157	ti->cpu; \
	158	})
	159	#define safe_smp_processor_id() smp_processor_id()
	160
	161	#else /* !CONFIG_X86_32_SMP && !CONFIG_X86_64_SMP */
c70dcb74	162	#define cpu_physical_id(cpu) boot_cpu_physical_apicid
a9c057c1 GC	163	#define safe_smp_processor_id() 0
a9c057c1 GC	164	#define stack_smp_processor_id() 0
c76cb368	165	#endif
16694024	166
1b000843 GC	167	#ifdef CONFIG_X86_LOCAL_APIC
	168
	169	static inline int logical_smp_processor_id(void)
	170	{
	171	/* we don't want to mark this access volatile - bad code generation */
	172	return GET_APIC_LOGICAL_ID((u32 )(APIC_BASE + APIC_LDR));
	173	}
	174
a24eae88	175	#ifndef CONFIG_X86_64
05f2d12c JS	176	static inline unsigned int read_apic_id(void)
	177	{
	178	return (u32 )(APIC_BASE + APIC_ID);
	179	}
ac23d4ee JS	180	#else
	181	extern unsigned int read_apic_id(void);
	182	#endif
	183
05f2d12c	184
1b000843 GC	185	# ifdef APIC_DEFINITION
	186	extern int hard_smp_processor_id(void);
	187	# else
	188	# include <mach_apicdef.h>
	189	static inline int hard_smp_processor_id(void)
	190	{
	191	/* we don't want to mark this access volatile - bad code generation */
05f2d12c	192	return GET_APIC_ID(read_apic_id());
1b000843 GC	193	}
	194	# endif /* APIC_DEFINITION */
	195
	196	#else /* CONFIG_X86_LOCAL_APIC */
	197
	198	# ifndef CONFIG_SMP
	199	# define hard_smp_processor_id() 0
	200	# endif
	201
	202	#endif /* CONFIG_X86_LOCAL_APIC */
	203
1dbb4726 GC	204	#ifdef CONFIG_HOTPLUG_CPU
	205	extern void cpu_exit_clear(void);
	206	extern void cpu_uninit(void);
1dbb4726 GC	207	#endif
1dbb4726 GC	208
639acb16	209	extern void smp_alloc_memory(void);
c27cfeff GC	210	#endif /* __ASSEMBLY__ */
c27cfeff GC	211	#endif