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Linux/arch/sparc/include/asm/smp_32.h

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  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) */
134 

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