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Diffstat (limited to 'arch/powerpc/include/asm/smp.h')
| -rw-r--r-- | arch/powerpc/include/asm/smp.h | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h new file mode 100644 index 000000000..95b66a0c6 --- /dev/null +++ b/arch/powerpc/include/asm/smp.h @@ -0,0 +1,234 @@ +/* + * smp.h: PowerPC-specific SMP code. + * + * 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. + */ + +#ifndef _ASM_POWERPC_SMP_H +#define _ASM_POWERPC_SMP_H +#ifdef __KERNEL__ + +#include <linux/threads.h> +#include <linux/cpumask.h> +#include <linux/kernel.h> +#include <linux/irqreturn.h> + +#ifndef __ASSEMBLY__ + +#ifdef CONFIG_PPC64 +#include <asm/paca.h> +#endif +#include <asm/percpu.h> + +extern int boot_cpuid; +extern int spinning_secondaries; +extern u32 *cpu_to_phys_id; + +extern void cpu_die(void); +extern int cpu_to_chip_id(int cpu); + +#ifdef CONFIG_SMP + +struct smp_ops_t { + void (*message_pass)(int cpu, int msg); +#ifdef CONFIG_PPC_SMP_MUXED_IPI + void (*cause_ipi)(int cpu); +#endif + int (*cause_nmi_ipi)(int cpu); + void (*probe)(void); + int (*kick_cpu)(int nr); + int (*prepare_cpu)(int nr); + void (*setup_cpu)(int nr); + void (*bringup_done)(void); + void (*take_timebase)(void); + void (*give_timebase)(void); + int (*cpu_disable)(void); + void (*cpu_die)(unsigned int nr); + int (*cpu_bootable)(unsigned int nr); +}; + +extern int smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us); +extern int smp_send_safe_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us); +extern void smp_send_debugger_break(void); +extern void start_secondary_resume(void); +extern void smp_generic_give_timebase(void); +extern void smp_generic_take_timebase(void); + +DECLARE_PER_CPU(unsigned int, cpu_pvr); + +#ifdef CONFIG_HOTPLUG_CPU +int generic_cpu_disable(void); +void generic_cpu_die(unsigned int cpu); +void generic_set_cpu_dead(unsigned int cpu); +void generic_set_cpu_up(unsigned int cpu); +int generic_check_cpu_restart(unsigned int cpu); +int is_cpu_dead(unsigned int cpu); +#else +#define generic_set_cpu_up(i) do { } while (0) +#endif + +#ifdef CONFIG_PPC64 +#define raw_smp_processor_id() (local_paca->paca_index) +#define hard_smp_processor_id() (get_paca()->hw_cpu_id) +#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()]) + +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; +} +#endif + +DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); +DECLARE_PER_CPU(cpumask_var_t, cpu_l2_cache_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); +} + +static inline struct cpumask *cpu_l2_cache_mask(int cpu) +{ + return per_cpu(cpu_l2_cache_map, cpu); +} + +extern int cpu_to_core_id(int cpu); + +/* 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 +#define PPC_MSG_TICK_BROADCAST 2 +#define PPC_MSG_NMI_IPI 3 + +/* This is only used by the powernv kernel */ +#define PPC_MSG_RM_HOST_ACTION 4 + +#define NMI_IPI_ALL_OTHERS -2 + +#ifdef CONFIG_NMI_IPI +extern int smp_handle_nmi_ipi(struct pt_regs *regs); +#else +static inline int smp_handle_nmi_ipi(struct pt_regs *regs) { return 0; } +#endif + +/* for irq controllers that have dedicated ipis per message (4) */ +extern int smp_request_message_ipi(int virq, int message); +extern const char *smp_ipi_name[]; + +/* for irq controllers with only a single ipi */ +extern void smp_muxed_ipi_message_pass(int cpu, int msg); +extern void smp_muxed_ipi_set_message(int cpu, int msg); +extern irqreturn_t smp_ipi_demux(void); +extern irqreturn_t smp_ipi_demux_relaxed(void); + +void smp_init_pSeries(void); +void smp_init_cell(void); +void smp_setup_cpu_maps(void); + +extern int __cpu_disable(void); +extern void __cpu_die(unsigned int cpu); + +#else +/* for UP */ +#define hard_smp_processor_id() get_hard_smp_processor_id(0) +#define smp_setup_cpu_maps() +static inline void inhibit_secondary_onlining(void) {} +static inline void uninhibit_secondary_onlining(void) {} +static inline const struct cpumask *cpu_sibling_mask(int cpu) +{ + return cpumask_of(cpu); +} + +#endif /* CONFIG_SMP */ + +#ifdef CONFIG_PPC64 +static inline int get_hard_smp_processor_id(int cpu) +{ + return paca_ptrs[cpu]->hw_cpu_id; +} + +static inline void set_hard_smp_processor_id(int cpu, int phys) +{ + paca_ptrs[cpu]->hw_cpu_id = phys; +} +#else +/* 32-bit */ +#ifndef CONFIG_SMP +extern int boot_cpuid_phys; +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) +{ + boot_cpuid_phys = phys; +} +#endif /* !CONFIG_SMP */ +#endif /* !CONFIG_PPC64 */ + +#if defined(CONFIG_PPC64) && (defined(CONFIG_SMP) || defined(CONFIG_KEXEC_CORE)) +extern void smp_release_cpus(void); +#else +static inline void smp_release_cpus(void) { }; +#endif + +extern int smt_enabled_at_boot; + +extern void smp_mpic_probe(void); +extern void smp_mpic_setup_cpu(int cpu); +extern int smp_generic_kick_cpu(int nr); +extern int smp_generic_cpu_bootable(unsigned int nr); + + +extern void smp_generic_give_timebase(void); +extern void smp_generic_take_timebase(void); + +extern struct smp_ops_t *smp_ops; + +extern void arch_send_call_function_single_ipi(int cpu); +extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); + +/* 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); +extern void generic_secondary_thread_init(void); +extern unsigned long __secondary_hold_spinloop; +extern unsigned long __secondary_hold_acknowledge; +extern char __secondary_hold; +extern unsigned int booting_thread_hwid; + +extern void __early_start(void); +#endif /* __ASSEMBLY__ */ + +#endif /* __KERNEL__ */ +#endif /* _ASM_POWERPC_SMP_H) */ |