arch/mips/include/asm/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 #define SMP_RESCHEDULE_YOURSELF 0x1     /* XXX braindead */
  39 #define SMP_CALL_FUNCTION       0x2
  40 /* Octeon - Tell another core to flush its icache */
  41 #define SMP_ICACHE_FLUSH        0x4
  42
  43
  44 extern void asmlinkage smp_bootstrap(void);
  45
  46 /*
  47  * this function sends a 'reschedule' IPI to another CPU.
  48  * it goes straight through and wastes no time serializing
  49  * anything. Worst case is that we lose a reschedule ...
  50  */
  51 static inline void smp_send_reschedule(int cpu)
  52 {
  53         extern struct plat_smp_ops *mp_ops;     /* private */
  54
  55         mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
  56 }
  57
  58 extern asmlinkage void smp_call_function_interrupt(void);
  59
  60 extern void arch_send_call_function_single_ipi(int cpu);
  61 extern void arch_send_call_function_ipi(cpumask_t mask);
  62
  63 #endif /* __ASM_SMP_H */