include/asm-mips/smp.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General
   3  * Public License.  See the file "COPYING" in the main directory of this
   4  * archive for more details.
   5  *
   6  * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
   7  * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
   8  * Copyright (C) 2000, 2001, 2002 Ralf Baechle
   9  * Copyright (C) 2000, 2001 Broadcom Corporation
  10  */
  11 #ifndef __ASM_SMP_H
  12 #define __ASM_SMP_H
  13
  14 #include <linux/bitops.h>
  15 #include <linux/linkage.h>
  16 #include <linux/threads.h>
  17 #include <linux/cpumask.h>
  18
  19 #include <asm/atomic.h>
  20 #include <asm/smp-ops.h>
  21
  22 extern int smp_num_siblings;
  23 extern cpumask_t cpu_sibling_map[];
  24
  25 #define raw_smp_processor_id() (current_thread_info()->cpu)
  26
  27 /* Map from cpu id to sequential logical cpu number.  This will only
  28    not be idempotent when cpus failed to come on-line.  */
  29 extern int __cpu_number_map[NR_CPUS];
  30 #define cpu_number_map(cpu)  __cpu_number_map[cpu]
  31
  32 /* The reverse map from sequential logical cpu number to cpu id.  */
  33 extern int __cpu_logical_map[NR_CPUS];
  34 #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  35
  36 #define NO_PROC_ID      (-1)
  37
  38 struct call_data_struct {
  39         void            (*func)(void *);
  40         void            *info;
  41         atomic_t        started;
  42         atomic_t        finished;
  43         int             wait;
  44 };
  45
  46 extern struct call_data_struct *call_data;
  47
  48 #define SMP_RESCHEDULE_YOURSELF 0x1     /* XXX braindead */
  49 #define SMP_CALL_FUNCTION       0x2
  50
  51 extern cpumask_t phys_cpu_present_map;
  52 #define cpu_possible_map        phys_cpu_present_map
  53
  54 extern void asmlinkage smp_bootstrap(void);
  55
  56 /*
  57  * this function sends a 'reschedule' IPI to another CPU.
  58  * it goes straight through and wastes no time serializing
  59  * anything. Worst case is that we lose a reschedule ...
  60  */
  61 static inline void smp_send_reschedule(int cpu)
  62 {
  63         extern struct plat_smp_ops *mp_ops;     /* private */
  64
  65         mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
  66 }
  67
  68 extern asmlinkage void smp_call_function_interrupt(void);
  69
  70 #endif /* __ASM_SMP_H */