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 volatile unsigned long cpu_callin_map[NR_CPUS]; 33 extern cpumask_t smp_commenced_mask; 34 extern struct linux_prom_registers smp_penguin_ctable; 35 36 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long, 37 unsigned long, unsigned long); 38 39 void cpu_panic(void); 40 extern void smp4m_irq_rotate(int cpu); 41 42 /* 43 * General functions that each host system must provide. 44 */ 45 46 void sun4m_init_smp(void); 47 void sun4d_init_smp(void); 48 49 void smp_callin(void); 50 void smp_boot_cpus(void); 51 void smp_store_cpu_info(int); 52 53 struct seq_file; 54 void smp_bogo(struct seq_file *); 55 void smp_info(struct seq_file *); 56 57 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long) 58 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void) 59 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id) 60 BTFIXUPDEF_BLACKBOX(load_current) 61 62 #define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4) 63 64 static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); } 65 static inline void xc1(smpfunc_t func, unsigned long arg1) 66 { smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); } 67 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) 68 { smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); } 69 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2, 70 unsigned long arg3) 71 { smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, 0); } 72 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2, 73 unsigned long arg3, unsigned long arg4) 74 { smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, arg4); } 75 76 static inline int smp_call_function(void (*func)(void *info), void *info, int wait) 77 { 78 xc1((smpfunc_t)func, (unsigned long)info); 79 return 0; 80 } 81 82 static inline int smp_call_function_single(int cpuid, void (*func) (void *info), 83 void *info, int wait) 84 { 85 smp_cross_call((smpfunc_t)func, cpumask_of_cpu(cpuid), 86 (unsigned long) info, 0, 0, 0); 87 return 0; 88 } 89 90 static inline int cpu_logical_map(int cpu) 91 { 92 return cpu; 93 } 94 95 static inline int hard_smp4m_processor_id(void) 96 { 97 int cpuid; 98 99 __asm__ __volatile__("rd %%tbr, %0\n\t" 100 "srl %0, 12, %0\n\t" 101 "and %0, 3, %0\n\t" : 102 "=&r" (cpuid)); 103 return cpuid; 104 } 105 106 static inline int hard_smp4d_processor_id(void) 107 { 108 int cpuid; 109 110 __asm__ __volatile__("lda [%%g0] %1, %0\n\t" : 111 "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1)); 112 return cpuid; 113 } 114 115 extern inline int hard_smpleon_processor_id(void) 116 { 117 int cpuid; 118 __asm__ __volatile__("rd %%asr17,%0\n\t" 119 "srl %0,28,%0" : 120 "=&r" (cpuid) : ); 121 return cpuid; 122 } 123 124 #ifndef MODULE 125 static inline int hard_smp_processor_id(void) 126 { 127 int cpuid; 128 129 /* Black box - sun4m 130 __asm__ __volatile__("rd %%tbr, %0\n\t" 131 "srl %0, 12, %0\n\t" 132 "and %0, 3, %0\n\t" : 133 "=&r" (cpuid)); 134 - sun4d 135 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t" 136 "nop; nop" : 137 "=&r" (cpuid)); 138 See btfixup.h and btfixupprep.c to understand how a blackbox works. 139 */ 140 __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t" 141 "sethi %%hi(boot_cpu_id), %0\n\t" 142 "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" : 143 "=&r" (cpuid)); 144 return cpuid; 145 } 146 #else 147 static inline int hard_smp_processor_id(void) 148 { 149 int cpuid; 150 151 __asm__ __volatile__("mov %%o7, %%g1\n\t" 152 "call ___f___hard_smp_processor_id\n\t" 153 " nop\n\t" 154 "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2"); 155 return cpuid; 156 } 157 #endif 158 159 #define raw_smp_processor_id() (current_thread_info()->cpu) 160 161 #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier 162 #define prof_counter(__cpu) cpu_data(__cpu).counter 163 164 void smp_setup_cpu_possible_map(void); 165 166 #endif /* !(__ASSEMBLY__) */ 167 168 /* Sparc specific messages. */ 169 #define MSG_CROSS_CALL 0x0005 /* run func on cpus */ 170 171 /* Empirical PROM processor mailbox constants. If the per-cpu mailbox 172 * contains something other than one of these then the ipi is from 173 * Linux's active_kernel_processor. This facility exists so that 174 * the boot monitor can capture all the other cpus when one catches 175 * a watchdog reset or the user enters the monitor using L1-A keys. 176 */ 177 #define MBOX_STOPCPU 0xFB 178 #define MBOX_IDLECPU 0xFC 179 #define MBOX_IDLECPU2 0xFD 180 #define MBOX_STOPCPU2 0xFE 181 182 #else /* SMP */ 183 184 #define hard_smp_processor_id() 0 185 #define smp_setup_cpu_possible_map() do { } while (0) 186 187 #endif /* !(SMP) */ 188 #endif /* !(_SPARC_SMP_H) */ 189