arch/sparc/include/asm/smp_32.h

   1 /* smp.h: Sparc specific SMP stuff.
   2  *
   3  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   4  */
   5
   6 #ifndef _SPARC_SMP_H
   7 #define _SPARC_SMP_H
   8
   9 #include <linux/threads.h>
  10 #include <asm/head.h>
  11
  12 #ifndef __ASSEMBLY__
  13
  14 #include <linux/cpumask.h>
  15
  16 #endif /* __ASSEMBLY__ */
  17
  18 #ifdef CONFIG_SMP
  19
  20 #ifndef __ASSEMBLY__
  21
  22 #include <asm/ptrace.h>
  23 #include <asm/asi.h>
  24 #include <linux/atomic.h>
  25
  26 /*
  27  *      Private routines/data
  28  */
  29
  30 extern unsigned char boot_cpu_id;
  31 extern volatile unsigned long cpu_callin_map[NR_CPUS];
  32 extern cpumask_t smp_commenced_mask;
  33 extern struct linux_prom_registers smp_penguin_ctable;
  34
  35 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
  36                        unsigned long, unsigned long);
  37
  38 void cpu_panic(void);
  39
  40 /*
  41  *      General functions that each host system must provide.
  42  */
  43
  44 void sun4m_init_smp(void);
  45 void sun4d_init_smp(void);
  46
  47 void smp_callin(void);
  48 void smp_store_cpu_info(int);
  49
  50 void smp_resched_interrupt(void);
  51 void smp_call_function_single_interrupt(void);
  52 void smp_call_function_interrupt(void);
  53
  54 struct seq_file;
  55 void smp_bogo(struct seq_file *);
  56 void smp_info(struct seq_file *);
  57
  58 struct sparc32_ipi_ops {
  59         void (*cross_call)(smpfunc_t func, cpumask_t mask, unsigned long arg1,
  60                            unsigned long arg2, unsigned long arg3,
  61                            unsigned long arg4);
  62         void (*resched)(int cpu);
  63         void (*single)(int cpu);
  64         void (*mask_one)(int cpu);
  65 };
  66 extern const struct sparc32_ipi_ops *sparc32_ipi_ops;
  67
  68 static inline void xc0(smpfunc_t func)
  69 {
  70         sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0);
  71 }
  72
  73 static inline void xc1(smpfunc_t func, unsigned long arg1)
  74 {
  75         sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0);
  76 }
  77 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  78 {
  79         sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0);
  80 }
  81
  82 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  83                        unsigned long arg3)
  84 {
  85         sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
  86                                     arg1, arg2, arg3, 0);
  87 }
  88
  89 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  90                        unsigned long arg3, unsigned long arg4)
  91 {
  92         sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
  93                                     arg1, arg2, arg3, arg4);
  94 }
  95
  96 extern void arch_send_call_function_single_ipi(int cpu);
  97 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  98
  99 static inline int cpu_logical_map(int cpu)
 100 {
 101         return cpu;
 102 }
 103
 104 extern int hard_smp_processor_id(void);
 105
 106 #define raw_smp_processor_id()          (current_thread_info()->cpu)
 107
 108 void smp_setup_cpu_possible_map(void);
 109
 110 #endif /* !(__ASSEMBLY__) */
 111
 112 /* Sparc specific messages. */
 113 #define MSG_CROSS_CALL         0x0005       /* run func on cpus */
 114
 115 /* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 116  * contains something other than one of these then the ipi is from
 117  * Linux's active_kernel_processor.  This facility exists so that
 118  * the boot monitor can capture all the other cpus when one catches
 119  * a watchdog reset or the user enters the monitor using L1-A keys.
 120  */
 121 #define MBOX_STOPCPU          0xFB
 122 #define MBOX_IDLECPU          0xFC
 123 #define MBOX_IDLECPU2         0xFD
 124 #define MBOX_STOPCPU2         0xFE
 125
 126 #else /* SMP */
 127
 128 #define hard_smp_processor_id()         0
 129 #define smp_setup_cpu_possible_map() do { } while (0)
 130
 131 #endif /* !(SMP) */
 132 #endif /* !(_SPARC_SMP_H) */