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 31 extern unsigned char boot_cpu_id; 32 33 typedef 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 40 void sun4m_init_smp(void); 41 void sun4d_init_smp(void); 42 43 void smp_callin(void); 44 void smp_boot_cpus(void); 45 void smp_store_cpu_info(int); 46 47 struct seq_file; 48 void smp_bogo(struct seq_file *); 49 void smp_info(struct seq_file *); 50 51 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long) 52 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void) 53 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id) 54 BTFIXUPDEF_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 58 static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); } 59 static inline void xc1(smpfunc_t func, unsigned long arg1) 60 { smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); } 61 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) 62 { smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); } 63 static 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); } 66 static 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 70 static 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 76 static 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 84 static inline int cpu_logical_map(int cpu) 85 { 86 return cpu; 87 } 88 89 static 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 } 99 100 static 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 } 108 109 #ifndef MODULE 110 static inline int hard_smp_processor_id(void) 111 { 112 int cpuid; 113 114 /* Black box - sun4m 115 __asm__ __volatile__("rd %%tbr, %0\n\t" 116 "srl %0, 12, %0\n\t" 117 "and %0, 3, %0\n\t" : 118 "=&r" (cpuid)); 119 - sun4d 120 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t" 121 "nop; nop" : 122 "=&r" (cpuid)); 123 See btfixup.h and btfixupprep.c to understand how a blackbox works. 124 */ 125 __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t" 126 "sethi %%hi(boot_cpu_id), %0\n\t" 127 "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" : 128 "=&r" (cpuid)); 129 return cpuid; 130 } 131 #else 132 static inline int hard_smp_processor_id(void) 133 { 134 int cpuid; 135 136 __asm__ __volatile__("mov %%o7, %%g1\n\t" 137 "call ___f___hard_smp_processor_id\n\t" 138 " nop\n\t" 139 "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2"); 140 return cpuid; 141 } 142 #endif 143 144 #define raw_smp_processor_id() (current_thread_info()->cpu) 145 146 #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier 147 #define prof_counter(__cpu) cpu_data(__cpu).counter 148 149 void smp_setup_cpu_possible_map(void); 150 151 #endif /* !(__ASSEMBLY__) */ 152 153 /* Sparc specific messages. */ 154 #define MSG_CROSS_CALL 0x0005 /* run func on cpus */ 155 156 /* Empirical PROM processor mailbox constants. If the per-cpu mailbox 157 * contains something other than one of these then the ipi is from 158 * Linux's active_kernel_processor. This facility exists so that 159 * the boot monitor can capture all the other cpus when one catches 160 * a watchdog reset or the user enters the monitor using L1-A keys. 161 */ 162 #define MBOX_STOPCPU 0xFB 163 #define MBOX_IDLECPU 0xFC 164 #define MBOX_IDLECPU2 0xFD 165 #define MBOX_STOPCPU2 0xFE 166 167 #else /* SMP */ 168 169 #define hard_smp_processor_id() 0 170 #define smp_setup_cpu_possible_map() do { } while (0) 171 172 #endif /* !(SMP) */ 173 #endif /* !(_SPARC_SMP_H) */ 174