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phoenix |
/*
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* smp.h: PPC64 specific SMP code.
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*
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* Original was a copy of sparc smp.h. Now heavily modified
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* for PPC.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifdef __KERNEL__
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#ifndef _PPC64_SMP_H
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#define _PPC64_SMP_H
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/threads.h> /* for NR_CPUS */
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_SMP
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#include <asm/paca.h>
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struct current_set_struct {
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struct task_struct *task;
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unsigned long *sp_real;
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};
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extern unsigned long cpu_online_map;
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extern void smp_message_pass(int target, int msg, unsigned long data, int wait);
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extern void smp_store_cpu_info(int id);
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extern void smp_send_tlb_invalidate(int);
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extern void smp_send_xmon_break(int cpu);
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struct pt_regs;
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extern void smp_message_recv(int, struct pt_regs *);
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/*
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* Retrieve the state of a CPU:
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* online: CPU is in a normal run state
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* possible: CPU is a candidate to be made online
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* available: CPU is candidate for the 'possible' pool
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*/
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#define cpu_possible(cpu) paca[cpu].active
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#define cpu_available(cpu) paca[cpu].available
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#define NO_PROC_ID 0xFF /* No processor magic marker */
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#define PROC_CHANGE_PENALTY 20
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/* 1 to 1 mapping on PPC -- Cort */
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#define cpu_logical_map(cpu) (cpu)
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#define cpu_number_map(x) (x)
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extern volatile unsigned long cpu_callin_map[NR_CPUS];
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#define smp_processor_id() (get_paca()->xPacaIndex)
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#define hard_smp_processor_id() (get_paca()->xHwProcNum)
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/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
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*
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* Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
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* in /proc/interrupts will be wrong!!! --Troy */
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#define PPC_MSG_CALL_FUNCTION 0
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#define PPC_MSG_RESCHEDULE 1
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#define PPC_MSG_INVALIDATE_TLB 2
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#define PPC_MSG_XMON_BREAK 3
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void smp_init_iSeries(void);
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void smp_init_pSeries(void);
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#else /* CONFIG_SMP */
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#define cpu_possible(cpu) ((cpu) == 0)
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#define cpu_available(cpu) ((cpu) == 0)
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#endif /* !(CONFIG_SMP) */
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#endif /* __ASSEMBLY__ */
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#endif /* !(_PPC64_SMP_H) */
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#endif /* __KERNEL__ */
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