/* * This file is subject to the terms and conditions of the GNU General * Public License.  See the file "COPYING" in the main directory of this * archive for more details. * * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com) * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc. * Copyright (C) 2000, 2001, 2002 Ralf Baechle * Copyright (C) 2000, 2001 Broadcom Corporation */#ifndef __ASM_SMP_H#define __ASM_SMP_H  #ifdef CONFIG_SMP #include <linux/bitops.h>#include <linux/linkage.h>#include <linux/threads.h>#include <linux/cpumask.h>#include <asm/atomic.h> #define raw_smp_processor_id() (current_thread_info()->cpu) /* Map from cpu id to sequential logical cpu number.  This will only   not be idempotent when cpus failed to come on-line.  */extern int __cpu_number_map[NR_CPUS];#define cpu_number_map(cpu)  __cpu_number_map[cpu] /* The reverse map from sequential logical cpu number to cpu id.  */extern int __cpu_logical_map[NR_CPUS];#define cpu_logical_map(cpu)  __cpu_logical_map[cpu] #define NO_PROC_ID	(-1) struct call_data_struct {	void		(*func)(void *);	void		*info;	atomic_t	started;	atomic_t	finished;	int		wait;}; extern struct call_data_struct *call_data; #define SMP_RESCHEDULE_YOURSELF	0x1	/* XXX braindead */#define SMP_CALL_FUNCTION	0x2 extern cpumask_t phys_cpu_present_map;#define cpu_possible_map	phys_cpu_present_map extern cpumask_t cpu_callout_map;/* 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);} /* * These are defined by the board-specific code. */ /* * Cause the function described by call_data to be executed on the passed * cpu.  When the function has finished, increment the finished field of * call_data. */extern void core_send_ipi(int cpu, unsigned int action); /* * Firmware CPU startup hook */extern void prom_boot_secondary(int cpu, struct task_struct *idle); /* *  After we've done initial boot, this function is called to allow the *  board code to clean up state, if needed */extern void prom_init_secondary(void); /* * Populate cpu_possible_map before smp_init, called from setup_arch. */extern void plat_smp_setup(void); /* * Called in smp_prepare_cpus. */extern void plat_prepare_cpus(unsigned int max_cpus); /* * Last chance for the board code to finish SMP initialization before * the CPU is "online". */extern void prom_smp_finish(void); /* Hook for after all CPUs are online */extern void prom_cpus_done(void); extern void asmlinkage smp_bootstrap(void); /* * this function sends a 'reschedule' IPI to another CPU. * it goes straight through and wastes no time serializing * anything. Worst case is that we lose a reschedule ... */static inline void smp_send_reschedule(int cpu){	core_send_ipi(cpu, SMP_RESCHEDULE_YOURSELF);} extern asmlinkage void smp_call_function_interrupt(void); #endif /* CONFIG_SMP */ #endif /* __ASM_SMP_H */