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/smp.h>
  17 #include <linux/threads.h>
  18 #include <linux/cpumask.h>
  19
  20 #include <asm/atomic.h>
  21 #include <asm/smp-ops.h>
  22
  23 extern int smp_num_siblings;
  24 extern cpumask_t cpu_sibling_map[];
  25
  26 #define raw_smp_processor_id() (current_thread_info()->cpu)
  27
  28 /* Map from cpu id to sequential logical cpu number.  This will only
  29    not be idempotent when cpus failed to come on-line.  */
  30 extern int __cpu_number_map[NR_CPUS];
  31 #define cpu_number_map(cpu)  __cpu_number_map[cpu]
  32
  33 /* The reverse map from sequential logical cpu number to cpu id.  */
  34 extern int __cpu_logical_map[NR_CPUS];
  35 #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  36
  37 #define NO_PROC_ID      (-1)
  38
  39 #define SMP_RESCHEDULE_YOURSELF 0x1     /* XXX braindead */
  40 #define SMP_CALL_FUNCTION       0x2
  41 /* Octeon - Tell another core to flush its icache */
  42 #define SMP_ICACHE_FLUSH        0x4
  43
  44 extern volatile cpumask_t cpu_callin_map;
  45
  46 extern void asmlinkage smp_bootstrap(void);
  47
  48 /*
  49  * this function sends a 'reschedule' IPI to another CPU.
  50  * it goes straight through and wastes no time serializing
  51  * anything. Worst case is that we lose a reschedule ...
  52  */
  53 static inline void smp_send_reschedule(int cpu)
  54 {
  55         extern struct plat_smp_ops *mp_ops;     /* private */
  56
  57         mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
  58 }
  59
  60 #ifdef CONFIG_HOTPLUG_CPU
  61 static inline int __cpu_disable(void)
  62 {
  63         extern struct plat_smp_ops *mp_ops;     /* private */
  64
  65         return mp_ops->cpu_disable();
  66 }
  67
  68 static inline void __cpu_die(unsigned int cpu)
  69 {
  70         extern struct plat_smp_ops *mp_ops;     /* private */
  71
  72         mp_ops->cpu_die(cpu);
  73 }
  74
  75 extern void play_dead(void);
  76 #endif
  77
  78 extern asmlinkage void smp_call_function_interrupt(void);
  79
  80 static inline void arch_send_call_function_single_ipi(int cpu)
  81 {
  82         extern struct plat_smp_ops *mp_ops;     /* private */
  83
  84         mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION);
  85 }
  86
  87 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
  88 {
  89         extern struct plat_smp_ops *mp_ops;     /* private */
  90
  91         mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
  92 }
  93
  94 #endif /* __ASM_SMP_H */