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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | /* smp.h: Sparc specific SMP stuff. * * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) */ #ifndef _SPARC_SMP_H #define _SPARC_SMP_H #ifndef __ASSEMBLY__ /* PROM provided per-processor information we need * to start them all up. */ struct prom_cpuinfo { int prom_node; int mid; }; #endif /* !(__ASSEMBLY__) */ #ifdef __SMP__ #ifndef __ASSEMBLY__ extern struct prom_cpuinfo linux_cpus[NCPUS]; /* Per processor Sparc parameters we need. */ struct cpuinfo_sparc { unsigned long udelay_val; /* that's it */ }; extern struct cpuinfo_sparc cpu_data[NR_CPUS]; typedef volatile unsigned char klock_t; extern klock_t kernel_flag; #define KLOCK_HELD 0xff #define KLOCK_CLEAR 0x00 /* * Private routines/data */ extern int smp_found_cpus; extern unsigned char boot_cpu_id; extern unsigned long cpu_present_map; extern volatile unsigned long smp_invalidate_needed[NR_CPUS]; extern volatile unsigned long kernel_counter; extern volatile unsigned char active_kernel_processor; extern void smp_message_irq(void); extern unsigned long ipi_count; extern volatile unsigned long kernel_counter; extern volatile unsigned long syscall_count; extern void print_lock_state(void); typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); /* * General functions that each host system must provide. */ extern void smp_callin(void); extern void smp_boot_cpus(void); extern void smp_store_cpu_info(int id); extern void smp_cross_call(smpfunc_t func, unsigned long arg1, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5); extern void smp_capture(void); extern void smp_release(void); extern inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); } extern inline void xc1(smpfunc_t func, unsigned long arg1) { smp_cross_call(func, arg1, 0, 0, 0, 0); } extern inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) { smp_cross_call(func, arg1, arg2, 0, 0, 0); } extern inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2, unsigned long arg3) { smp_cross_call(func, arg1, arg2, arg3, 0, 0); } extern inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2, unsigned long arg3, unsigned long arg4) { smp_cross_call(func, arg1, arg2, arg3, arg4, 0); } extern inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5) { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); } extern volatile int cpu_number_map[NR_CPUS]; extern volatile int cpu_logical_map[NR_CPUS]; extern __inline int smp_processor_id(void) { int cpuid; __asm__ __volatile__("rd %%tbr, %0\n\t" "srl %0, 12, %0\n\t" "and %0, 3, %0\n\t" : "=&r" (cpuid)); return cpuid; } extern volatile unsigned long smp_proc_in_lock[NR_CPUS]; /* for computing process time */ extern volatile int smp_process_available; extern inline int smp_swap(volatile int *addr, int value) { __asm__ __volatile__("swap [%2], %0\n\t" : "=&r" (value) : "0" (value), "r" (addr)); return value; } extern inline volatile void inc_smp_counter(volatile int *ctr) { int tmp; while((tmp = smp_swap(ctr, -1)) == -1) ; smp_swap(ctr, (tmp + 1)); } extern inline volatile void dec_smp_counter(volatile int *ctr) { int tmp; while((tmp = smp_swap(ctr, -1)) == -1) ; smp_swap(ctr, (tmp - 1)); } extern inline volatile int read_smp_counter(volatile int *ctr) { int value; while((value = *ctr) == -1) ; return value; } #endif /* !(__ASSEMBLY__) */ /* Sparc specific messages. */ #define MSG_CAPTURE 0x0004 /* Park a processor. */ #define MSG_CROSS_CALL 0x0005 /* run func on cpus */ /* Empirical PROM processor mailbox constants. If the per-cpu mailbox * contains something other than one of these then the ipi is from * Linux's active_kernel_processor. This facility exists so that * the boot monitor can capture all the other cpus when one catches * a watchdog reset or the user enters the monitor using L1-A keys. */ #define MBOX_STOPCPU 0xFB #define MBOX_IDLECPU 0xFC #define MBOX_IDLECPU2 0xFD #define MBOX_STOPCPU2 0xFE #define NO_PROC_ID 0xFF #define PROC_CHANGE_PENALTY 20 #define SMP_FROM_INT 1 #define SMP_FROM_SYSCALL 2 #endif /* !(__SMP__) */ #endif /* !(_SPARC_SMP_H) */ |