arch/sparc/include/asm/smp_32.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* smp.h: Sparc specific SMP stuff.
   3  *
   4  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6
   7 #ifndef _SPARC_SMP_H
   8 #define _SPARC_SMP_H
   9
  10 #include <linux/threads.h>
  11 #include <asm/head.h>
  12
  13 #ifndef __ASSEMBLY__
  14
  15 #include <linux/cpumask.h>
  16
  17 #endif /* __ASSEMBLY__ */
  18
  19 #ifdef CONFIG_SMP
  20
  21 #ifndef __ASSEMBLY__
  22
  23 #include <asm/ptrace.h>
  24 #include <asm/asi.h>
  25 #include <linux/atomic.h>
  26
  27 /*
  28  *      Private routines/data
  29  */
  30
  31 extern unsigned char boot_cpu_id;
  32 extern volatile unsigned long cpu_callin_map[NR_CPUS];
  33 extern cpumask_t smp_commenced_mask;
  34 extern struct linux_prom_registers smp_penguin_ctable;
  35
  36 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
  37                        unsigned long, unsigned long);
  38
  39 void cpu_panic(void);
  40
  41 /*
  42  *      General functions that each host system must provide.
  43  */
  44
  45 void sun4m_init_smp(void);
  46 void sun4d_init_smp(void);
  47
  48 void smp_callin(void);
  49 void smp_store_cpu_info(int);
  50
  51 void smp_resched_interrupt(void);
  52 void smp_call_function_single_interrupt(void);
  53 void smp_call_function_interrupt(void);
  54
  55 struct seq_file;
  56 void smp_bogo(struct seq_file *);
  57 void smp_info(struct seq_file *);
  58
  59 struct sparc32_ipi_ops {
  60         void (*cross_call)(smpfunc_t func, cpumask_t mask, unsigned long arg1,
  61                            unsigned long arg2, unsigned long arg3,
  62                            unsigned long arg4);
  63         void (*resched)(int cpu);
  64         void (*single)(int cpu);
  65         void (*mask_one)(int cpu);
  66 };
  67 extern const struct sparc32_ipi_ops *sparc32_ipi_ops;
  68
  69 static inline void xc0(smpfunc_t func)
  70 {
  71         sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0);
  72 }
  73
  74 static inline void xc1(smpfunc_t func, unsigned long arg1)
  75 {
  76         sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0);
  77 }
  78 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
  79 {
  80         sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0);
  81 }
  82
  83 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  84                        unsigned long arg3)
  85 {
  86         sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
  87                                     arg1, arg2, arg3, 0);
  88 }
  89
  90 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
  91                        unsigned long arg3, unsigned long arg4)
  92 {
  93         sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
  94                                     arg1, arg2, arg3, arg4);
  95 }
  96
  97 void arch_send_call_function_single_ipi(int cpu);
  98 void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  99
 100 static inline int cpu_logical_map(int cpu)
 101 {
 102         return cpu;
 103 }
 104
 105 int hard_smp_processor_id(void);
 106
 107 #define raw_smp_processor_id()          (current_thread_info()->cpu)
 108
 109 void smp_setup_cpu_possible_map(void);
 110
 111 #endif /* !(__ASSEMBLY__) */
 112
 113 /* Sparc specific messages. */
 114 #define MSG_CROSS_CALL         0x0005       /* run func on cpus */
 115
 116 /* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 117  * contains something other than one of these then the ipi is from
 118  * Linux's active_kernel_processor.  This facility exists so that
 119  * the boot monitor can capture all the other cpus when one catches
 120  * a watchdog reset or the user enters the monitor using L1-A keys.
 121  */
 122 #define MBOX_STOPCPU          0xFB
 123 #define MBOX_IDLECPU          0xFC
 124 #define MBOX_IDLECPU2         0xFD
 125 #define MBOX_STOPCPU2         0xFE
 126
 127 #else /* SMP */
 128
 129 #define hard_smp_processor_id()         0
 130 #define smp_setup_cpu_possible_map() do { } while (0)
 131
 132 #endif /* !(SMP) */
 133 #endif /* !(_SPARC_SMP_H) */