77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
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/*
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* include/asm-s390/smp.h
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*
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* S390 version
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* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
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* Martin Schwidefsky (schwidefsky@de.ibm.com)
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* Heiko Carstens (heiko.carstens@de.ibm.com)
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*/
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#ifndef __ASM_SMP_H
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#define __ASM_SMP_H
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/bitops.h>
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#if defined(__KERNEL__) && defined(CONFIG_SMP) && !defined(__ASSEMBLY__)
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#include <asm/lowcore.h>
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#include <asm/sigp.h>
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#include <asm/ptrace.h>
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#include <asm/system.h>
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/*
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s390 specific smp.c headers
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*/
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typedef struct
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{
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int intresting;
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sigp_ccode ccode;
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__u32 status;
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__u16 cpu;
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} sigp_info;
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extern void machine_restart_smp(char *);
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extern void machine_halt_smp(void);
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extern void machine_power_off_smp(void);
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#define NO_PROC_ID 0xFF /* No processor magic marker */
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/*
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* This magic constant controls our willingness to transfer
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* a process across CPUs. Such a transfer incurs misses on the L1
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* cache, and on a P6 or P5 with multiple L2 caches L2 hits. My
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* gut feeling is this will vary by board in value. For a board
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* with separate L2 cache it probably depends also on the RSS, and
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* for a board with shared L2 cache it ought to decay fast as other
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* processes are run.
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*/
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#define PROC_CHANGE_PENALTY 20 /* Schedule penalty */
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#define raw_smp_processor_id() (S390_lowcore.cpu_nr)
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#define cpu_logical_map(cpu) (cpu)
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extern int __cpu_disable (void);
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extern void __cpu_die (unsigned int cpu);
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extern void cpu_die (void) __attribute__ ((noreturn));
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extern int __cpu_up (unsigned int cpu);
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extern struct mutex smp_cpu_state_mutex;
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extern int smp_cpu_polarization[];
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extern void arch_send_call_function_single_ipi(int cpu);
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extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
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#endif
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#ifdef CONFIG_HOTPLUG_CPU
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extern int smp_rescan_cpus(void);
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#else
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static inline int smp_rescan_cpus(void) { return 0; }
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#endif
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extern union save_area *zfcpdump_save_areas[NR_CPUS + 1];
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#endif
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