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 void cpu_panic(void); 37 38 /* 39 * General functions that each host system must provide. 40 */ 41 42 void sun4m_init_smp(void); 43 void sun4d_init_smp(void); 44 45 void smp_callin(void); 46 void smp_store_cpu_info(int); 47 48 void smp_resched_interrupt(void); 49 void smp_call_function_single_interrupt(void); 50 void smp_call_function_interrupt(void); 51 52 struct seq_file; 53 void smp_bogo(struct seq_file *); 54 void smp_info(struct seq_file *); 55 56 struct sparc32_ipi_ops { 57 void (*cross_call)(void *func, cpumask_t mask, unsigned long arg1, 58 unsigned long arg2, unsigned long arg3, 59 unsigned long arg4); 60 void (*resched)(int cpu); 61 void (*single)(int cpu); 62 void (*mask_one)(int cpu); 63 }; 64 extern const struct sparc32_ipi_ops *sparc32_ipi_ops; 65 66 static inline void xc0(void *func) 67 { 68 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0); 69 } 70 71 static inline void xc1(void *func, unsigned long arg1) 72 { 73 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0); 74 } 75 static inline void xc2(void *func, unsigned long arg1, unsigned long arg2) 76 { 77 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0); 78 } 79 80 static inline void xc3(void *func, unsigned long arg1, unsigned long arg2, 81 unsigned long arg3) 82 { 83 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 84 arg1, arg2, arg3, 0); 85 } 86 87 static inline void xc4(void *func, unsigned long arg1, unsigned long arg2, 88 unsigned long arg3, unsigned long arg4) 89 { 90 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 91 arg1, arg2, arg3, arg4); 92 } 93 94 void arch_send_call_function_single_ipi(int cpu); 95 void arch_send_call_function_ipi_mask(const struct cpumask *mask); 96 97 static inline int cpu_logical_map(int cpu) 98 { 99 return cpu; 100 } 101 102 int hard_smp_processor_id(void); 103 104 #define raw_smp_processor_id() (current_thread_info()->cpu) 105 106 void smp_setup_cpu_possible_map(void); 107 108 #endif /* !(__ASSEMBLY__) */ 109 110 /* Sparc specific messages. */ 111 #define MSG_CROSS_CALL 0x0005 /* run func on cpus */ 112 113 /* Empirical PROM processor mailbox constants. If the per-cpu mailbox 114 * contains something other than one of these then the ipi is from 115 * Linux's active_kernel_processor. This facility exists so that 116 * the boot monitor can capture all the other cpus when one catches 117 * a watchdog reset or the user enters the monitor using L1-A keys. 118 */ 119 #define MBOX_STOPCPU 0xFB 120 #define MBOX_IDLECPU 0xFC 121 #define MBOX_IDLECPU2 0xFD 122 #define MBOX_STOPCPU2 0xFE 123 124 #else /* SMP */ 125 126 #define hard_smp_processor_id() 0 127 #define smp_setup_cpu_possible_map() do { } while (0) 128 129 #endif /* !(SMP) */ 130 #endif /* !(_SPARC_SMP_H) */ 131