Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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/config.h> |
| 10 | #include <linux/threads.h> |
| 11 | #include <asm/head.h> |
| 12 | #include <asm/btfixup.h> |
| 13 | |
| 14 | #ifndef __ASSEMBLY__ |
| 15 | |
| 16 | #include <linux/cpumask.h> |
| 17 | |
| 18 | #endif /* __ASSEMBLY__ */ |
| 19 | |
| 20 | #ifdef CONFIG_SMP |
| 21 | |
| 22 | #ifndef __ASSEMBLY__ |
| 23 | |
| 24 | #include <asm/ptrace.h> |
| 25 | #include <asm/asi.h> |
| 26 | #include <asm/atomic.h> |
| 27 | |
| 28 | /* |
| 29 | * Private routines/data |
| 30 | */ |
| 31 | |
| 32 | extern unsigned char boot_cpu_id; |
| 33 | extern cpumask_t phys_cpu_present_map; |
| 34 | #define cpu_possible_map phys_cpu_present_map |
| 35 | |
| 36 | typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long, |
| 37 | unsigned long, unsigned long); |
| 38 | |
| 39 | /* |
| 40 | * General functions that each host system must provide. |
| 41 | */ |
| 42 | |
| 43 | void sun4m_init_smp(void); |
| 44 | void sun4d_init_smp(void); |
| 45 | |
| 46 | void smp_callin(void); |
| 47 | void smp_boot_cpus(void); |
| 48 | void smp_store_cpu_info(int); |
| 49 | |
| 50 | struct seq_file; |
| 51 | void smp_bogo(struct seq_file *); |
| 52 | void smp_info(struct seq_file *); |
| 53 | |
| 54 | BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) |
| 55 | BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int) |
| 56 | BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void) |
| 57 | BTFIXUPDEF_BLACKBOX(hard_smp_processor_id) |
| 58 | BTFIXUPDEF_BLACKBOX(load_current) |
| 59 | |
| 60 | #define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5) |
| 61 | #define smp_message_pass(target,msg,data,wait) BTFIXUP_CALL(smp_message_pass)(target,msg,data,wait) |
| 62 | |
| 63 | extern __inline__ void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); } |
| 64 | extern __inline__ void xc1(smpfunc_t func, unsigned long arg1) |
| 65 | { smp_cross_call(func, arg1, 0, 0, 0, 0); } |
| 66 | extern __inline__ void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) |
| 67 | { smp_cross_call(func, arg1, arg2, 0, 0, 0); } |
| 68 | extern __inline__ void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2, |
| 69 | unsigned long arg3) |
| 70 | { smp_cross_call(func, arg1, arg2, arg3, 0, 0); } |
| 71 | extern __inline__ void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2, |
| 72 | unsigned long arg3, unsigned long arg4) |
| 73 | { smp_cross_call(func, arg1, arg2, arg3, arg4, 0); } |
| 74 | extern __inline__ void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2, |
| 75 | unsigned long arg3, unsigned long arg4, unsigned long arg5) |
| 76 | { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); } |
| 77 | |
| 78 | extern __inline__ int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait) |
| 79 | { |
| 80 | xc1((smpfunc_t)func, (unsigned long)info); |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | extern __volatile__ int __cpu_number_map[NR_CPUS]; |
| 85 | extern __volatile__ int __cpu_logical_map[NR_CPUS]; |
| 86 | |
| 87 | extern __inline__ int cpu_logical_map(int cpu) |
| 88 | { |
| 89 | return __cpu_logical_map[cpu]; |
| 90 | } |
| 91 | extern __inline__ int cpu_number_map(int cpu) |
| 92 | { |
| 93 | return __cpu_number_map[cpu]; |
| 94 | } |
| 95 | |
| 96 | extern __inline__ int hard_smp4m_processor_id(void) |
| 97 | { |
| 98 | int cpuid; |
| 99 | |
| 100 | __asm__ __volatile__("rd %%tbr, %0\n\t" |
| 101 | "srl %0, 12, %0\n\t" |
| 102 | "and %0, 3, %0\n\t" : |
| 103 | "=&r" (cpuid)); |
| 104 | return cpuid; |
| 105 | } |
| 106 | |
| 107 | extern __inline__ int hard_smp4d_processor_id(void) |
| 108 | { |
| 109 | int cpuid; |
| 110 | |
| 111 | __asm__ __volatile__("lda [%%g0] %1, %0\n\t" : |
| 112 | "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1)); |
| 113 | return cpuid; |
| 114 | } |
| 115 | |
| 116 | #ifndef MODULE |
| 117 | extern __inline__ int hard_smp_processor_id(void) |
| 118 | { |
| 119 | int cpuid; |
| 120 | |
| 121 | /* Black box - sun4m |
| 122 | __asm__ __volatile__("rd %%tbr, %0\n\t" |
| 123 | "srl %0, 12, %0\n\t" |
| 124 | "and %0, 3, %0\n\t" : |
| 125 | "=&r" (cpuid)); |
| 126 | - sun4d |
| 127 | __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t" |
| 128 | "nop; nop" : |
| 129 | "=&r" (cpuid)); |
| 130 | See btfixup.h and btfixupprep.c to understand how a blackbox works. |
| 131 | */ |
| 132 | __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t" |
| 133 | "sethi %%hi(boot_cpu_id), %0\n\t" |
| 134 | "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" : |
| 135 | "=&r" (cpuid)); |
| 136 | return cpuid; |
| 137 | } |
| 138 | #else |
| 139 | extern __inline__ int hard_smp_processor_id(void) |
| 140 | { |
| 141 | int cpuid; |
| 142 | |
| 143 | __asm__ __volatile__("mov %%o7, %%g1\n\t" |
| 144 | "call ___f___hard_smp_processor_id\n\t" |
| 145 | " nop\n\t" |
| 146 | "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2"); |
| 147 | return cpuid; |
| 148 | } |
| 149 | #endif |
| 150 | |
| 151 | #define smp_processor_id() (current_thread_info()->cpu) |
| 152 | |
| 153 | #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier |
| 154 | #define prof_counter(__cpu) cpu_data(__cpu).counter |
| 155 | |
| 156 | #endif /* !(__ASSEMBLY__) */ |
| 157 | |
| 158 | /* Sparc specific messages. */ |
| 159 | #define MSG_CROSS_CALL 0x0005 /* run func on cpus */ |
| 160 | |
| 161 | /* Empirical PROM processor mailbox constants. If the per-cpu mailbox |
| 162 | * contains something other than one of these then the ipi is from |
| 163 | * Linux's active_kernel_processor. This facility exists so that |
| 164 | * the boot monitor can capture all the other cpus when one catches |
| 165 | * a watchdog reset or the user enters the monitor using L1-A keys. |
| 166 | */ |
| 167 | #define MBOX_STOPCPU 0xFB |
| 168 | #define MBOX_IDLECPU 0xFC |
| 169 | #define MBOX_IDLECPU2 0xFD |
| 170 | #define MBOX_STOPCPU2 0xFE |
| 171 | |
| 172 | #endif /* SMP */ |
| 173 | |
| 174 | #define NO_PROC_ID 0xFF |
| 175 | |
| 176 | #endif /* !(_SPARC_SMP_H) */ |