/* * linux/include/asm-arm/smp.h * * Copyright (C) 2004-2005 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __ASM_ARM_SMP_H #define __ASM_ARM_SMP_H #include <linux/threads.h> #include <linux/cpumask.h> #include <linux/thread_info.h> #include <asm/arch/smp.h> #ifndef CONFIG_SMP # error "<asm-arm/smp.h> included in non-SMP build" #endif #define raw_smp_processor_id() (current_thread_info()->cpu) /* * at the moment, there's not a big penalty for changing CPUs * (the >big< penalty is running SMP in the first place) */ #define PROC_CHANGE_PENALTY 15 struct seq_file; /* * generate IPI list text */ extern void show_ipi_list(struct seq_file *p); /* * Called from assembly code, this handles an IPI. */ asmlinkage void do_IPI(struct pt_regs *regs); /* * Setup the SMP cpu_possible_map */ extern void smp_init_cpus(void); /* * Move global data into per-processor storage. */ extern void smp_store_cpu_info(unsigned int cpuid); /* * Raise an IPI cross call on CPUs in callmap. */ extern void smp_cross_call(cpumask_t callmap); /* * Broadcast a timer interrupt to the other CPUs. */ extern void smp_send_timer(void); /* * Boot a secondary CPU, and assign it the specified idle task. * This also gives us the initial stack to use for this CPU. */ extern int boot_secondary(unsigned int cpu, struct task_struct *); /* * Called from platform specific assembly code, this is the * secondary CPU entry point. */ asmlinkage void secondary_start_kernel(void); /* * Perform platform specific initialisation of the specified CPU. */ extern void platform_secondary_init(unsigned int cpu); /* * Initial data for bringing up a secondary CPU. */ struct secondary_data { unsigned long pgdir; void *stack; }; extern struct secondary_data secondary_data; extern int __cpu_disable(void); extern int mach_cpu_disable(unsigned int cpu); extern void __cpu_die(unsigned int cpu); extern void cpu_die(void); extern void platform_cpu_die(unsigned int cpu); extern int platform_cpu_kill(unsigned int cpu); extern void platform_cpu_enable(unsigned int cpu); #ifdef CONFIG_LOCAL_TIMERS /* * Setup a local timer interrupt for a CPU. */ extern void local_timer_setup(unsigned int cpu); /* * Stop a local timer interrupt. */ extern void local_timer_stop(unsigned int cpu); /* * Platform provides this to acknowledge a local timer IRQ */ extern int local_timer_ack(void); #else static inline void local_timer_setup(unsigned int cpu) { } static inline void local_timer_stop(unsigned int cpu) { } #endif /* * show local interrupt info */ extern void show_local_irqs(struct seq_file *); /* * Called from assembly, this is the local timer IRQ handler */ asmlinkage void do_local_timer(struct pt_regs *); #endif /* ifndef __ASM_ARM_SMP_H */