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 extern void smp4m_irq_rotate(int cpu); 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_boot_cpus(void); 50 void smp_store_cpu_info(int); 51 52 void smp_resched_interrupt(void); 53 void smp_call_function_single_interrupt(void); 54 void smp_call_function_interrupt(void); 55 56 struct seq_file; 57 void smp_bogo(struct seq_file *); 58 void smp_info(struct seq_file *); 59 60 struct sparc32_ipi_ops { 61 void (*cross_call)(smpfunc_t func, cpumask_t mask, unsigned long arg1, 62 unsigned long arg2, unsigned long arg3, 63 unsigned long arg4); 64 void (*resched)(int cpu); 65 void (*single)(int cpu); 66 void (*mask_one)(int cpu); 67 }; 68 extern const struct sparc32_ipi_ops *sparc32_ipi_ops; 69 70 static inline void xc0(smpfunc_t func) 71 { 72 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0); 73 } 74 75 static inline void xc1(smpfunc_t func, unsigned long arg1) 76 { 77 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0); 78 } 79 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) 80 { 81 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0); 82 } 83 84 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2, 85 unsigned long arg3) 86 { 87 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 88 arg1, arg2, arg3, 0); 89 } 90 91 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2, 92 unsigned long arg3, unsigned long arg4) 93 { 94 sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 95 arg1, arg2, arg3, arg4); 96 } 97 98 extern void arch_send_call_function_single_ipi(int cpu); 99 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 100 101 static inline int cpu_logical_map(int cpu) 102 { 103 return cpu; 104 } 105 106 extern int hard_smp_processor_id(void); 107 108 #define raw_smp_processor_id() (current_thread_info()->cpu) 109 110 #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier 111 #define prof_counter(__cpu) cpu_data(__cpu).counter 112 113 void smp_setup_cpu_possible_map(void); 114 115 #endif /* !(__ASSEMBLY__) */ 116 117 /* Sparc specific messages. */ 118 #define MSG_CROSS_CALL 0x0005 /* run func on cpus */ 119 120 /* Empirical PROM processor mailbox constants. If the per-cpu mailbox 121 * contains something other than one of these then the ipi is from 122 * Linux's active_kernel_processor. This facility exists so that 123 * the boot monitor can capture all the other cpus when one catches 124 * a watchdog reset or the user enters the monitor using L1-A keys. 125 */ 126 #define MBOX_STOPCPU 0xFB 127 #define MBOX_IDLECPU 0xFC 128 #define MBOX_IDLECPU2 0xFD 129 #define MBOX_STOPCPU2 0xFE 130 131 #else /* SMP */ 132 133 #define hard_smp_processor_id() 0 134 #define smp_setup_cpu_possible_map() do { } while (0) 135 136 #endif /* !(SMP) */ 137 #endif /* !(_SPARC_SMP_H) */ 138