smp.h 4.2 KB
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/* 
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 * smp.h: PowerPC-specific SMP code.
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 *
 * Original was a copy of sparc smp.h.  Now heavily modified
 * for PPC.
 *
 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

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#ifndef _ASM_POWERPC_SMP_H
#define _ASM_POWERPC_SMP_H
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#ifdef __KERNEL__

#include <linux/threads.h>
#include <linux/cpumask.h>
#include <linux/kernel.h>

#ifndef __ASSEMBLY__

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#ifdef CONFIG_PPC64
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#include <asm/paca.h>
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#endif
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#include <asm/percpu.h>
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extern int boot_cpuid;

extern void cpu_die(void);

#ifdef CONFIG_SMP

extern void smp_send_debugger_break(int cpu);
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extern void smp_message_recv(int);
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DECLARE_PER_CPU(unsigned int, cpu_pvr);
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#ifdef CONFIG_HOTPLUG_CPU
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extern void fixup_irqs(const struct cpumask *map);
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int generic_cpu_disable(void);
int generic_cpu_enable(unsigned int cpu);
void generic_cpu_die(unsigned int cpu);
void generic_mach_cpu_die(void);
#endif

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#ifdef CONFIG_PPC64
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#define raw_smp_processor_id()	(local_paca->paca_index)
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#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
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#else
/* 32-bit */
extern int smp_hw_index[];

#define raw_smp_processor_id()	(current_thread_info()->cpu)
#define hard_smp_processor_id() 	(smp_hw_index[smp_processor_id()])
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static inline int get_hard_smp_processor_id(int cpu)
{
	return smp_hw_index[cpu];
}

static inline void set_hard_smp_processor_id(int cpu, int phys)
{
	smp_hw_index[cpu] = phys;
}
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#endif
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DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);

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);
}

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extern int cpu_to_core_id(int cpu);
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/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
 *
 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
 * in /proc/interrupts will be wrong!!! --Troy */
#define PPC_MSG_CALL_FUNCTION   0
#define PPC_MSG_RESCHEDULE      1
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#define PPC_MSG_CALL_FUNC_SINGLE	2
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#define PPC_MSG_DEBUGGER_BREAK  3

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/*
 * irq controllers that have dedicated ipis per message and don't
 * need additional code in the action handler may use this
 */
extern int smp_request_message_ipi(int virq, int message);
extern const char *smp_ipi_name[];

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void smp_init_iSeries(void);
void smp_init_pSeries(void);
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void smp_init_cell(void);
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void smp_init_celleb(void);
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void smp_setup_cpu_maps(void);
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extern int __cpu_disable(void);
extern void __cpu_die(unsigned int cpu);
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#else
/* for UP */
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#define hard_smp_processor_id()		get_hard_smp_processor_id(0)
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#define smp_setup_cpu_maps()

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#endif /* CONFIG_SMP */

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#ifdef CONFIG_PPC64
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static inline int get_hard_smp_processor_id(int cpu)
{
	return paca[cpu].hw_cpu_id;
}

static inline void set_hard_smp_processor_id(int cpu, int phys)
{
	paca[cpu].hw_cpu_id = phys;
}
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extern void smp_release_cpus(void);

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#else
/* 32-bit */
#ifndef CONFIG_SMP
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extern int boot_cpuid_phys;
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static inline int get_hard_smp_processor_id(int cpu)
{
	return boot_cpuid_phys;
}

static inline void set_hard_smp_processor_id(int cpu, int phys)
{
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	boot_cpuid_phys = phys;
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}
#endif /* !CONFIG_SMP */
#endif /* !CONFIG_PPC64 */
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extern int smt_enabled_at_boot;

extern int smp_mpic_probe(void);
extern void smp_mpic_setup_cpu(int cpu);
extern void smp_generic_kick_cpu(int nr);

extern void smp_generic_give_timebase(void);
extern void smp_generic_take_timebase(void);

extern struct smp_ops_t *smp_ops;

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extern void arch_send_call_function_single_ipi(int cpu);
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extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
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/* Definitions relative to the secondary CPU spin loop
 * and entry point. Not all of them exist on both 32 and
 * 64-bit but defining them all here doesn't harm
 */
extern void generic_secondary_smp_init(void);
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extern void generic_secondary_thread_init(void);
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extern unsigned long __secondary_hold_spinloop;
extern unsigned long __secondary_hold_acknowledge;
extern char __secondary_hold;

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#endif /* __ASSEMBLY__ */

#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_SMP_H) */