smp.h
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上传日期:2013-02-24
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文件大小:2k
- #ifndef __LINUX_SMP_H
- #define __LINUX_SMP_H
- /*
- * Generic SMP support
- * Alan Cox. <alan@redhat.com>
- */
- #include <linux/config.h>
- #ifdef CONFIG_SMP
- #include <linux/kernel.h>
- #include <asm/smp.h>
- /*
- * main cross-CPU interfaces, handles INIT, TLB flush, STOP, etc.
- * (defined in asm header):
- */
- /*
- * stops all CPUs but the current one:
- */
- extern void smp_send_stop(void);
- /*
- * sends a 'reschedule' event to another CPU:
- */
- extern void FASTCALL(smp_send_reschedule(int cpu));
- /*
- * Boot processor call to load the other CPU's
- */
- extern void smp_boot_cpus(void);
- /*
- * Processor call in. Must hold processors until ..
- */
- extern void smp_callin(void);
- /*
- * Multiprocessors may now schedule
- */
- extern void smp_commence(void);
- /*
- * Call a function on all other processors
- */
- extern int smp_call_function (void (*func) (void *info), void *info,
- int retry, int wait);
- /*
- * True once the per process idle is forked
- */
- extern int smp_threads_ready;
- extern int smp_num_cpus;
- extern volatile unsigned long smp_msg_data;
- extern volatile int smp_src_cpu;
- extern volatile int smp_msg_id;
- #define MSG_ALL_BUT_SELF 0x8000 /* Assume <32768 CPU's */
- #define MSG_ALL 0x8001
- #define MSG_INVALIDATE_TLB 0x0001 /* Remote processor TLB invalidate */
- #define MSG_STOP_CPU 0x0002 /* Sent to shut down slave CPU's
- * when rebooting
- */
- #define MSG_RESCHEDULE 0x0003 /* Reschedule request from master CPU*/
- #define MSG_CALL_FUNCTION 0x0004 /* Call function on all other CPUs */
- #else
- /*
- * These macros fold the SMP functionality into a single CPU system
- */
-
- #define smp_num_cpus 1
- #define smp_processor_id() 0
- #define hard_smp_processor_id() 0
- #define smp_threads_ready 1
- #define kernel_lock()
- #define cpu_logical_map(cpu) 0
- #define cpu_number_map(cpu) 0
- #define smp_call_function(func,info,retry,wait) ({ 0; })
- #define cpu_online_map 1
- #endif
- #endif