1 /* smp.h: Sparc specific SMP stuff.
3 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
9 #include <linux/threads.h>
11 #include <asm/btfixup.h>
15 #include <linux/cpumask.h>
17 #endif /* __ASSEMBLY__ */
23 #include <asm/ptrace.h>
25 #include <asm/atomic.h>
28 * Private routines/data
31 extern unsigned char boot_cpu_id;
33 typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long,
34 unsigned long, unsigned long);
37 * General functions that each host system must provide.
40 void sun4m_init_smp(void);
41 void sun4d_init_smp(void);
43 void smp_callin(void);
44 void smp_boot_cpus(void);
45 void smp_store_cpu_info(int);
48 void smp_bogo(struct seq_file *);
49 void smp_info(struct seq_file *);
51 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, cpumask_t, unsigned long, unsigned long, unsigned long, unsigned long)
52 BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
53 BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
54 BTFIXUPDEF_BLACKBOX(load_current)
56 #define smp_cross_call(func,mask,arg1,arg2,arg3,arg4) BTFIXUP_CALL(smp_cross_call)(func,mask,arg1,arg2,arg3,arg4)
58 static inline void xc0(smpfunc_t func) { smp_cross_call(func, cpu_online_map, 0, 0, 0, 0); }
59 static inline void xc1(smpfunc_t func, unsigned long arg1)
60 { smp_cross_call(func, cpu_online_map, arg1, 0, 0, 0); }
61 static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
62 { smp_cross_call(func, cpu_online_map, arg1, arg2, 0, 0); }
63 static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
65 { smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, 0); }
66 static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
67 unsigned long arg3, unsigned long arg4)
68 { smp_cross_call(func, cpu_online_map, arg1, arg2, arg3, arg4); }
70 static inline int smp_call_function(void (*func)(void *info), void *info, int wait)
72 xc1((smpfunc_t)func, (unsigned long)info);
76 static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
79 smp_cross_call((smpfunc_t)func, cpumask_of_cpu(cpuid),
80 (unsigned long) info, 0, 0, 0);
84 static inline int cpu_logical_map(int cpu)
89 static inline int hard_smp4m_processor_id(void)
93 __asm__ __volatile__("rd %%tbr, %0\n\t"
100 static inline int hard_smp4d_processor_id(void)
104 __asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
105 "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
110 static inline int hard_smp_processor_id(void)
115 __asm__ __volatile__("rd %%tbr, %0\n\t"
117 "and %0, 3, %0\n\t" :
120 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
123 See btfixup.h and btfixupprep.c to understand how a blackbox works.
125 __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
126 "sethi %%hi(boot_cpu_id), %0\n\t"
127 "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
132 static inline int hard_smp_processor_id(void)
136 __asm__ __volatile__("mov %%o7, %%g1\n\t"
137 "call ___f___hard_smp_processor_id\n\t"
139 "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
144 #define raw_smp_processor_id() (current_thread_info()->cpu)
146 #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier
147 #define prof_counter(__cpu) cpu_data(__cpu).counter
149 void smp_setup_cpu_possible_map(void);
151 #endif /* !(__ASSEMBLY__) */
153 /* Sparc specific messages. */
154 #define MSG_CROSS_CALL 0x0005 /* run func on cpus */
156 /* Empirical PROM processor mailbox constants. If the per-cpu mailbox
157 * contains something other than one of these then the ipi is from
158 * Linux's active_kernel_processor. This facility exists so that
159 * the boot monitor can capture all the other cpus when one catches
160 * a watchdog reset or the user enters the monitor using L1-A keys.
162 #define MBOX_STOPCPU 0xFB
163 #define MBOX_IDLECPU 0xFC
164 #define MBOX_IDLECPU2 0xFD
165 #define MBOX_STOPCPU2 0xFE
169 #define hard_smp_processor_id() 0
170 #define smp_setup_cpu_possible_map() do { } while (0)
173 #endif /* !(_SPARC_SMP_H) */