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