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