smp.h

来自「Linux Kernel 2.6.9 for OMAP1710」· C头文件 代码 · 共 70 行

#ifndef __ASM_SMP_H
#define __ASM_SMP_H

#include <linux/config.h>

#if defined(CONFIG_SMP)

/* Page Zero Location PDC will look for the address to branch to when we poke
** slave CPUs still in "Icache loop".
*/
#define PDC_OS_BOOT_RENDEZVOUS     0x10
#define PDC_OS_BOOT_RENDEZVOUS_HI  0x28

#ifndef ASSEMBLY
#include <linux/bitops.h>
#include <linux/threads.h>	/* for NR_CPUS */
#include <linux/cpumask.h>
typedef unsigned long address_t;

extern cpumask_t cpu_online_map;


/*
 *	Private routines/data
 *
 *	physical and logical are equivalent until we support CPU hotplug.
 */
#define cpu_number_map(cpu)	(cpu)
#define cpu_logical_map(cpu)	(cpu)

extern void smp_send_reschedule(int cpu);

#endif /* !ASSEMBLY */

/*
 *	This magic constant controls our willingness to transfer
 *      a process across CPUs. Such a transfer incurs cache and tlb
 *      misses. The current value is inherited from i386. Still needs
 *      to be tuned for parisc.
 */
 
#define PROC_CHANGE_PENALTY	15		/* Schedule penalty */

#undef ENTRY_SYS_CPUS
#ifdef ENTRY_SYS_CPUS
#define STATE_RENDEZVOUS			0
#define STATE_STOPPED 				1 
#define STATE_RUNNING				2
#define STATE_HALTED				3
#endif

extern unsigned long cpu_present_mask;

#define smp_processor_id()	(current_thread_info()->cpu)

#endif /* CONFIG_SMP */

#define NO_PROC_ID		0xFF		/* No processor magic marker */
#define ANY_PROC_ID		0xFF		/* Any processor magic marker */
static inline int __cpu_disable (void) {
  return 0;
}
static inline void __cpu_die (unsigned int cpu) {
  while(1)
    ;
}
extern int __cpu_up (unsigned int cpu);

#endif /*  __ASM_SMP_H */