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/*
* include/asm-s390/smp.h
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#ifndef __ASM_SMP_H
#define __ASM_SMP_H
#include <linux/config.h>
#ifdef CONFIG_SMP
#ifndef __ASSEMBLY__
#include <asm/lowcore.h>
#include <linux/threads.h> // FOR NR_CPUS definition only.
#include <linux/kernel.h> // FOR FASTCALL definition
#define smp_processor_id() (current->processor)
#define NO_PROC_ID 0xFF /* No processor magic marker */
/*
* This magic constant controls our willingness to transfer
* a process across CPUs. Such a transfer incurs misses on the L1
* cache, and on a P6 or P5 with multiple L2 caches L2 hits. My
* gut feeling is this will vary by board in value. For a board
* with separate L2 cache it probably depends also on the RSS, and
* for a board with shared L2 cache it ought to decay fast as other
* processes are run.
*/
#define PROC_CHANGE_PENALTY 20 /* Schedule penalty */
extern void count_cpus(void);
extern __inline__ int cpu_logical_map(int cpu)
{
return cpu;
}
extern __inline__ int cpu_number_map(int cpu)
{
return cpu;
}
extern __inline__ __u16 hard_smp_processor_id(void)
{
__u16 cpu_address;
__asm__ ("stap %0\n" : "=m" (cpu_address));
return cpu_address;
}
#define cpu_logical_map(cpu) (cpu)
void smp_local_timer_interrupt(struct pt_regs * regs);
/*
s390 specific smp.c headers
*/
typedef struct
{
int intresting;
sigp_ccode ccode;
__u32 status;
__u16 cpu;
} sigp_info;
sigp_ccode
smp_ext_call(int cpu, void (*callback)(void *info), void *info, int wait);
void smp_ext_call_others(void (*callback)(void *info), void *info, int wait);
sigp_ccode smp_ext_bitcall(int cpu, ec_bit_sig sig);
void smp_ext_bitcall_others(ec_bit_sig sig);
int smp_signal_others(sigp_order_code order_code,__u32 parameter,
int spin,sigp_info *info);
#endif
#endif
#endif
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