/* smp.h: Sparc specific SMP stuff. * * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) */ #ifndef _SPARC_SMP_H #define _SPARC_SMP_H #include <linux/threads.h> #include <asm/head.h> #include <asm/btfixup.h> #ifndef __ASSEMBLY__ #include <linux/cpumask.h> #endif /* __ASSEMBLY__ */ #ifdef CONFIG_SMP #ifndef __ASSEMBLY__ #include <asm/ptrace.h> #include <asm/asi.h> #include <asm/atomic.h> /* * Private routines/data */ extern unsigned char boot_cpu_id; extern cpumask_t phys_cpu_present_map; #define cpu_possible_map phys_cpu_present_map typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); /* * General functions that each host system must provide. */ void sun4m_init_smp(void); void sun4d_init_smp(void); void smp_callin(void); void smp_boot_cpus(void); void smp_store_cpu_info(int); struct seq_file; void smp_bogo(struct seq_file *); void smp_info(struct seq_file *); BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int) BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void) BTFIXUPDEF_BLACKBOX(hard_smp_processor_id) BTFIXUPDEF_BLACKBOX(load_current) #define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5) #define smp_message_pass(target,msg,data,wait) BTFIXUP_CALL(smp_message_pass)(target,msg,data,wait) static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); } static inline void xc1(smpfunc_t func, unsigned long arg1) { smp_cross_call(func, arg1, 0, 0, 0, 0); } static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) { smp_cross_call(func, arg1, arg2, 0, 0, 0); } static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2, unsigned long arg3) { smp_cross_call(func, arg1, arg2, arg3, 0, 0); } static 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); } static 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); } static inline int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait) { xc1((smpfunc_t)func, (unsigned long)info); return 0; } static inline int cpu_logical_map(int cpu) { return cpu; } static inline int hard_smp4m_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; } static inline int hard_smp4d_processor_id(void) { int cpuid; __asm__ __volatile__("lda [%%g0] %1, %0\n\t" : "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1)); return cpuid; } #ifndef MODULE static inline int hard_smp_processor_id(void) { int cpuid; /* Black box - sun4m __asm__ __volatile__("rd %%tbr, %0\n\t" "srl %0, 12, %0\n\t" "and %0, 3, %0\n\t" : "=&r" (cpuid)); - sun4d __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t" "nop; nop" : "=&r" (cpuid)); See btfixup.h and btfixupprep.c to understand how a blackbox works. */ __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t" "sethi %%hi(boot_cpu_id), %0\n\t" "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" : "=&r" (cpuid)); return cpuid; } #else static inline int hard_smp_processor_id(void) { int cpuid; __asm__ __volatile__("mov %%o7, %%g1\n\t" "call ___f___hard_smp_processor_id\n\t" " nop\n\t" "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2"); return cpuid; } #endif #define raw_smp_processor_id() (current_thread_info()->cpu) #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier #define prof_counter(__cpu) cpu_data(__cpu).counter void smp_setup_cpu_possible_map(void); #endif /* !(__ASSEMBLY__) */ /* Sparc specific messages. */ #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 #else /* SMP */ #define hard_smp_processor_id() 0 #define smp_setup_cpu_possible_map() do { } while (0) #endif /* !(SMP) */ #define NO_PROC_ID 0xFF #endif /* !(_SPARC_SMP_H) */