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phoenix |
/*
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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 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
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* Copyright (C) 2000, 2001, 2002 by Ralf Baechle
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* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
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* Copyright (C) 2000, 2001 Broadcom Corporation
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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/config.h>
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#ifdef CONFIG_SMP
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#include <linux/threads.h>
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#include <asm/atomic.h>
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#include <asm/current.h>
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#define smp_processor_id() (current->processor)
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#define PROC_CHANGE_PENALTY 20
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/* Map from cpu id to sequential logical cpu number. This will only
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not be idempotent when cpus failed to come on-line. */
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extern int __cpu_number_map[NR_CPUS];
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#define cpu_number_map(cpu) __cpu_number_map[cpu]
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/* The reverse map from sequential logical cpu number to cpu id. */
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extern int __cpu_logical_map[NR_CPUS];
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#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
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#define NO_PROC_ID (-1)
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#define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */
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#define SMP_CALL_FUNCTION 0x2
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#if (NR_CPUS <= _MIPS_SZLONG)
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typedef unsigned long cpumask_t;
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#define CPUMASK_CLRALL(p) do { (p) = 0; } while(0)
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#define CPUMASK_SETB(p, bit) (p) |= 1UL << (bit)
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#define CPUMASK_CLRB(p, bit) (p) &= ~(1UL << (bit))
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#define CPUMASK_TSTB(p, bit) ((p) & (1UL << (bit)))
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#elif (NR_CPUS <= 128)
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/*
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* The foll should work till 128 cpus.
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*/
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#define CPUMASK_SIZE (NR_CPUS/_MIPS_SZLONG)
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#define CPUMASK_INDEX(bit) ((bit) >> 6)
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#define CPUMASK_SHFT(bit) ((bit) & 0x3f)
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typedef struct {
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unsigned long _bits[CPUMASK_SIZE];
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} cpumask_t;
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#define CPUMASK_CLRALL(p) (p)._bits[0] = 0, (p)._bits[1] = 0
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#define CPUMASK_SETB(p, bit) (p)._bits[CPUMASK_INDEX(bit)] |= \
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(1UL << CPUMASK_SHFT(bit))
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#define CPUMASK_CLRB(p, bit) (p)._bits[CPUMASK_INDEX(bit)] &= \
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~(1UL << CPUMASK_SHFT(bit))
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#define CPUMASK_TSTB(p, bit) ((p)._bits[CPUMASK_INDEX(bit)] & \
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(1UL << CPUMASK_SHFT(bit)))
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#else
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#error cpumask macros only defined for 128p kernels
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#endif
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struct call_data_struct {
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void (*func)(void *);
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void *info;
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atomic_t started;
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atomic_t finished;
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int wait;
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};
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extern struct call_data_struct *call_data;
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extern cpumask_t cpu_online_map;
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/* These are defined by the board-specific code. */
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/*
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* Cause the function described by call_data to be executed on the passed
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* cpu. When the function has finished, increment the finished field of
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* call_data.
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*/
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void core_send_ipi(int cpu, unsigned int action);
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/*
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* Clear all undefined state in the cpu, set up sp and gp to the passed
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* values, and kick the cpu into smp_bootstrap();
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*/
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void prom_boot_secondary(int cpu, unsigned long sp, unsigned long gp);
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/*
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* After we've done initial boot, this function is called to allow the
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* board code to clean up state, if needed
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*/
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void prom_init_secondary(void);
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/*
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* Do whatever setup needs to be done for SMP at the board level. Return
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* the number of cpus in the system, including this one
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*/
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int prom_setup_smp(void);
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void prom_smp_finish(void);
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extern void asmlinkage smp_bootstrap(void);
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#endif /* CONFIG_SMP */
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#endif /* _ASM_SMP_H */
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