smp.h

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    1 /*
    2  * This program is free software; you can redistribute it and/or
    3  * modify it under the terms of the GNU General Public License
    4  * as published by the Free Software Foundation; either version 2
    5  * of the License, or (at your option) any later version.
    6  *
    7  * This program is distributed in the hope that it will be useful,
    8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   10  * GNU General Public License for more details.
   11  *
   12  * You should have received a copy of the GNU General Public License
   13  * along with this program; if not, write to the Free Software
   14  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
   15  *
   16  * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
   17  * Copyright (C) 2000, 2001, 2002 by Ralf Baechle
   18  * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
   19  * Copyright (C) 2000, 2001 Broadcom Corporation
   20  */
   21 #ifndef _ASM_SMP_H
   22 #define _ASM_SMP_H
   23 
   24 #include <linux/config.h>
   25 
   26 #ifdef CONFIG_SMP
   27 
   28 #include <linux/threads.h>
   29 #include <asm/atomic.h>
   30 #include <asm/current.h>
   31 
   32 #define smp_processor_id()      (current->processor)
   33 
   34 #define PROC_CHANGE_PENALTY     20
   35 
   36 /* Map from cpu id to sequential logical cpu number.  This will only
   37    not be idempotent when cpus failed to come on-line.  */
   38 extern int __cpu_number_map[NR_CPUS];
   39 #define cpu_number_map(cpu)  __cpu_number_map[cpu]
   40 
   41 /* The reverse map from sequential logical cpu number to cpu id.  */
   42 extern int __cpu_logical_map[NR_CPUS];
   43 #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
   44 
   45 #define NO_PROC_ID      (-1)
   46 
   47 #define SMP_RESCHEDULE_YOURSELF 0x1     /* XXX braindead */
   48 #define SMP_CALL_FUNCTION       0x2
   49 
   50 #if (NR_CPUS <= _MIPS_SZLONG)
   51 
   52 typedef unsigned long   cpumask_t;
   53 
   54 #define CPUMASK_CLRALL(p)       do { (p) = 0; } while(0)
   55 #define CPUMASK_SETB(p, bit)    (p) |= 1UL << (bit)
   56 #define CPUMASK_CLRB(p, bit)    (p) &= ~(1UL << (bit))
   57 #define CPUMASK_TSTB(p, bit)    ((p) & (1UL << (bit)))
   58 
   59 #elif (NR_CPUS <= 128)
   60 
   61 /*
   62  * The foll should work till 128 cpus.
   63  */
   64 #define CPUMASK_SIZE            (NR_CPUS/_MIPS_SZLONG)
   65 #define CPUMASK_INDEX(bit)      ((bit) >> 6)
   66 #define CPUMASK_SHFT(bit)       ((bit) & 0x3f)
   67 
   68 typedef struct {
   69         unsigned long   _bits[CPUMASK_SIZE];
   70 } cpumask_t;
   71 
   72 #define CPUMASK_CLRALL(p)       (p)._bits[0] = 0, (p)._bits[1] = 0
   73 #define CPUMASK_SETB(p, bit)    (p)._bits[CPUMASK_INDEX(bit)] |= \
   74                                         (1UL << CPUMASK_SHFT(bit))
   75 #define CPUMASK_CLRB(p, bit)    (p)._bits[CPUMASK_INDEX(bit)] &= \
   76                                         ~(1UL << CPUMASK_SHFT(bit))
   77 #define CPUMASK_TSTB(p, bit)    ((p)._bits[CPUMASK_INDEX(bit)] & \
   78                                         (1UL << CPUMASK_SHFT(bit)))
   79 
   80 #else
   81 #error cpumask macros only defined for 128p kernels
   82 #endif
   83 
   84 struct call_data_struct {
   85         void            (*func)(void *);
   86         void            *info;
   87         atomic_t        started;
   88         atomic_t        finished;
   89         int             wait;
   90 };
   91 
   92 extern struct call_data_struct *call_data;
   93 
   94 extern cpumask_t cpu_online_map;
   95 
   96 #endif /* CONFIG_SMP */
   97 #endif /* _ASM_SMP_H */

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FreeBSD/Linux Kernel Cross Reference sys/include/asm-mips64/smp.h

FreeBSD/Linux Kernel Cross Reference
sys/include/asm-mips64/smp.h