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#include <asm/btfixup.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 <asm/atomic.h> 26 27/* 28 * Private routines/data 29 */ 30 31extern unsigned char boot_cpu_id; 32 33typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long, 34 unsigned long, unsigned long); 35 36/* 37 * General functions that each host system must provide. 38 */ 39 40void sun4m_init_smp(void); 41void sun4d_init_smp(void); 42 43void smp_callin(void); 44void smp_boot_cpus(void); 45void smp_store_cpu_info(int); 46 47struct seq_file; 48void smp_bogo(struct seq_file *); 49void smp_info(struct seq_file *); 50 51BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long) 52BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void) 53BTFIXUPDEF_BLACKBOX(hard_smp_processor_id) 54BTFIXUPDEF_BLACKBOX(load_current) 55 56#define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4) 57 58static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); } 59static inline void xc1(smpfunc_t func, unsigned long arg1) 60{ smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); } 61static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) 62{ smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); } 63static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2, 64 unsigned long arg3) 65{ smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, 0); } 66static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2, 67 unsigned long arg3, unsigned long arg4) 68{ smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, arg4); } 69 70static inline int smp_call_function(void (*func)(void *info), void *info, int wait) 71{ 72 xc1((smpfunc_t)func, (unsigned long)info); 73 return 0; 74} 75 76static inline int smp_call_function_single(int cpuid, void (*func) (void *info), 77 void *info, int wait) 78{ 79 smp_cross_call((smpfunc_t)func, cpumask_of_cpu(cpuid), 80 (unsigned long) info, 0, 0, 0); 81 return 0; 82} 83 84static inline int cpu_logical_map(int cpu) 85{ 86 return cpu; 87} 88 89static inline int hard_smp4m_processor_id(void) 90{ 91 int cpuid; 92 93 __asm__ __volatile__("rd %%tbr, %0\n\t" 94 "srl %0, 12, %0\n\t" 95 "and %0, 3, %0\n\t" : 96 "=&r" (cpuid)); 97 return cpuid; 98} 99 100static inline int hard_smp4d_processor_id(void) 101{ 102 int cpuid; 103 104 __asm__ __volatile__("lda [%%g0] %1, %0\n\t" : 105 "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1)); 106 return cpuid; 107} 108 109extern inline int hard_smpleon_processor_id(void) 110{ 111 int cpuid; 112 __asm__ __volatile__("rd %%asr17,%0\n\t" 113 "srl %0,28,%0" : 114 "=&r" (cpuid) : ); 115 return cpuid; 116} 117 118#ifndef MODULE 119static inline int hard_smp_processor_id(void) 120{ 121 int cpuid; 122 123 /* Black box - sun4m 124 __asm__ __volatile__("rd %%tbr, %0\n\t" 125 "srl %0, 12, %0\n\t" 126 "and %0, 3, %0\n\t" : 127 "=&r" (cpuid)); 128 - sun4d 129 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t" 130 "nop; nop" : 131 "=&r" (cpuid)); 132 See btfixup.h and btfixupprep.c to understand how a blackbox works. 133 */ 134 __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t" 135 "sethi %%hi(boot_cpu_id), %0\n\t" 136 "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" : 137 "=&r" (cpuid)); 138 return cpuid; 139} 140#else 141static inline int hard_smp_processor_id(void) 142{ 143 int cpuid; 144 145 __asm__ __volatile__("mov %%o7, %%g1\n\t" 146 "call ___f___hard_smp_processor_id\n\t" 147 " nop\n\t" 148 "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2"); 149 return cpuid; 150} 151#endif 152 153#define raw_smp_processor_id() (current_thread_info()->cpu) 154 155#define prof_multiplier(__cpu) cpu_data(__cpu).multiplier 156#define prof_counter(__cpu) cpu_data(__cpu).counter 157 158void smp_setup_cpu_possible_map(void); 159 160#endif /* !(__ASSEMBLY__) */ 161 162/* Sparc specific messages. */ 163#define MSG_CROSS_CALL 0x0005 /* run func on cpus */ 164 165/* Empirical PROM processor mailbox constants. If the per-cpu mailbox 166 * contains something other than one of these then the ipi is from 167 * Linux's active_kernel_processor. This facility exists so that 168 * the boot monitor can capture all the other cpus when one catches 169 * a watchdog reset or the user enters the monitor using L1-A keys. 170 */ 171#define MBOX_STOPCPU 0xFB 172#define MBOX_IDLECPU 0xFC 173#define MBOX_IDLECPU2 0xFD 174#define MBOX_STOPCPU2 0xFE 175 176#else /* SMP */ 177 178#define hard_smp_processor_id() 0 179#define smp_setup_cpu_possible_map() do { } while (0) 180 181#endif /* !(SMP) */ 182#endif /* !(_SPARC_SMP_H) */ 183