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, unsigned long, 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,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5) 59 60 static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); } 61 static inline void xc1(smpfunc_t func, unsigned long arg1) 62 { smp_cross_call(func, arg1, 0, 0, 0, 0); } 63 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) 64 { smp_cross_call(func, arg1, arg2, 0, 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, arg1, arg2, arg3, 0, 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, arg1, arg2, arg3, arg4, 0); } 71 static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2, 72 unsigned long arg3, unsigned long arg4, unsigned long arg5) 73 { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); } 74 75 static inline int smp_call_function(void (*func)(void *info), void *info, int wait) 76 { 77 xc1((smpfunc_t)func, (unsigned long)info); 78 return 0; 79 } 80 81 static inline int cpu_logical_map(int cpu) 82 { 83 return cpu; 84 } 85 86 static inline int hard_smp4m_processor_id(void) 87 { 88 int cpuid; 89 90 __asm__ __volatile__("rd %%tbr, %0\n\t" 91 "srl %0, 12, %0\n\t" 92 "and %0, 3, %0\n\t" : 93 "=&r" (cpuid)); 94 return cpuid; 95 } 96 97 static inline int hard_smp4d_processor_id(void) 98 { 99 int cpuid; 100 101 __asm__ __volatile__("lda [%%g0] %1, %0\n\t" : 102 "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1)); 103 return cpuid; 104 } 105 106 #ifndef MODULE 107 static inline int hard_smp_processor_id(void) 108 { 109 int cpuid; 110 111 /* Black box - sun4m 112 __asm__ __volatile__("rd %%tbr, %0\n\t" 113 "srl %0, 12, %0\n\t" 114 "and %0, 3, %0\n\t" : 115 "=&r" (cpuid)); 116 - sun4d 117 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t" 118 "nop; nop" : 119 "=&r" (cpuid)); 120 See btfixup.h and btfixupprep.c to understand how a blackbox works. 121 */ 122 __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t" 123 "sethi %%hi(boot_cpu_id), %0\n\t" 124 "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" : 125 "=&r" (cpuid)); 126 return cpuid; 127 } 128 #else 129 static inline int hard_smp_processor_id(void) 130 { 131 int cpuid; 132 133 __asm__ __volatile__("mov %%o7, %%g1\n\t" 134 "call ___f___hard_smp_processor_id\n\t" 135 " nop\n\t" 136 "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2"); 137 return cpuid; 138 } 139 #endif 140 141 #define raw_smp_processor_id() (current_thread_info()->cpu) 142 143 #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier 144 #define prof_counter(__cpu) cpu_data(__cpu).counter 145 146 void smp_setup_cpu_possible_map(void); 147 148 #endif /* !(__ASSEMBLY__) */ 149 150 /* Sparc specific messages. */ 151 #define MSG_CROSS_CALL 0x0005 /* run func on cpus */ 152 153 /* Empirical PROM processor mailbox constants. If the per-cpu mailbox 154 * contains something other than one of these then the ipi is from 155 * Linux's active_kernel_processor. This facility exists so that 156 * the boot monitor can capture all the other cpus when one catches 157 * a watchdog reset or the user enters the monitor using L1-A keys. 158 */ 159 #define MBOX_STOPCPU 0xFB 160 #define MBOX_IDLECPU 0xFC 161 #define MBOX_IDLECPU2 0xFD 162 #define MBOX_STOPCPU2 0xFE 163 164 #else /* SMP */ 165 166 #define hard_smp_processor_id() 0 167 #define smp_setup_cpu_possible_map() do { } while (0) 168 169 #endif /* !(SMP) */ 170 171 #define NO_PROC_ID 0xFF 172 173 #endif /* !(_SPARC_SMP_H) */ 174