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 extern cpumask_t cpu_core_map[];
  26
  27 #define raw_smp_processor_id() (current_thread_info()->cpu)
  28
  29 /* Map from cpu id to sequential logical cpu number.  This will only
  30    not be idempotent when cpus failed to come on-line.  */
  31 extern int __cpu_number_map[NR_CPUS];
  32 #define cpu_number_map(cpu)  __cpu_number_map[cpu]
  33
  34 /* The reverse map from sequential logical cpu number to cpu id.  */
  35 extern int __cpu_logical_map[NR_CPUS];
  36 #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  37
  38 #define NO_PROC_ID      (-1)
  39
  40 #define SMP_RESCHEDULE_YOURSELF 0x1     /* XXX braindead */
  41 #define SMP_CALL_FUNCTION       0x2
  42 /* Octeon - Tell another core to flush its icache */
  43 #define SMP_ICACHE_FLUSH        0x4
  44 /* Used by kexec crashdump to save all cpu's state */
  45 #define SMP_DUMP                0x8
  46 #define SMP_ASK_C0COUNT         0x10
  47
  48 extern volatile cpumask_t cpu_callin_map;
  49
  50 /* Mask of CPUs which are currently definitely operating coherently */
  51 extern cpumask_t cpu_coherent_mask;
  52
  53 extern void asmlinkage smp_bootstrap(void);
  54
  55 /*
  56  * this function sends a 'reschedule' IPI to another CPU.
  57  * it goes straight through and wastes no time serializing
  58  * anything. Worst case is that we lose a reschedule ...
  59  */
  60 static inline void smp_send_reschedule(int cpu)
  61 {
  62         extern struct plat_smp_ops *mp_ops;     /* private */
  63
  64         mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
  65 }
  66
  67 #ifdef CONFIG_HOTPLUG_CPU
  68 static inline int __cpu_disable(void)
  69 {
  70         extern struct plat_smp_ops *mp_ops;     /* private */
  71
  72         return mp_ops->cpu_disable();
  73 }
  74
  75 static inline void __cpu_die(unsigned int cpu)
  76 {
  77         extern struct plat_smp_ops *mp_ops;     /* private */
  78
  79         mp_ops->cpu_die(cpu);
  80 }
  81
  82 extern void play_dead(void);
  83 #endif
  84
  85 extern asmlinkage void smp_call_function_interrupt(void);
  86
  87 static inline void arch_send_call_function_single_ipi(int cpu)
  88 {
  89         extern struct plat_smp_ops *mp_ops;     /* private */
  90
  91         mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION);
  92 }
  93
  94 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
  95 {
  96         extern struct plat_smp_ops *mp_ops;     /* private */
  97
  98         mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
  99 }
 100
 101 #if defined(CONFIG_KEXEC)
 102 extern void (*dump_ipi_function_ptr)(void *);
 103 void dump_send_ipi(void (*dump_ipi_callback)(void *));
 104 #endif
 105 #endif /* __ASM_SMP_H */