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 <linux/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 /* Used by kexec crashdump to save all cpu's state */
  44 #define SMP_DUMP                0x8
  45
  46 extern volatile cpumask_t cpu_callin_map;
  47
  48 extern void asmlinkage smp_bootstrap(void);
  49
  50 /*
  51  * this function sends a 'reschedule' IPI to another CPU.
  52  * it goes straight through and wastes no time serializing
  53  * anything. Worst case is that we lose a reschedule ...
  54  */
  55 static inline void smp_send_reschedule(int cpu)
  56 {
  57         extern struct plat_smp_ops *mp_ops;     /* private */
  58
  59         mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
  60 }
  61
  62 #ifdef CONFIG_HOTPLUG_CPU
  63 static inline int __cpu_disable(void)
  64 {
  65         extern struct plat_smp_ops *mp_ops;     /* private */
  66
  67         return mp_ops->cpu_disable();
  68 }
  69
  70 static inline void __cpu_die(unsigned int cpu)
  71 {
  72         extern struct plat_smp_ops *mp_ops;     /* private */
  73
  74         mp_ops->cpu_die(cpu);
  75 }
  76
  77 extern void play_dead(void);
  78 #endif
  79
  80 extern asmlinkage void smp_call_function_interrupt(void);
  81
  82 static inline void arch_send_call_function_single_ipi(int cpu)
  83 {
  84         extern struct plat_smp_ops *mp_ops;     /* private */
  85
  86         mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION);
  87 }
  88
  89 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
  90 {
  91         extern struct plat_smp_ops *mp_ops;     /* private */
  92
  93         mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
  94 }
  95
  96 #if defined(CONFIG_KEXEC)
  97 extern void (*dump_ipi_function_ptr)(void *);
  98 void dump_send_ipi(void (*dump_ipi_callback)(void *));
  99 #endif
 100 #endif /* __ASM_SMP_H */