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1da177e4 LT |
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 | ||
1da177e4 LT |
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 cpumask_t phys_cpu_present_map; | |
33 | #define cpu_possible_map phys_cpu_present_map | |
34 | ||
35 | typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long, | |
36 | unsigned long, unsigned long); | |
37 | ||
38 | /* | |
39 | * General functions that each host system must provide. | |
40 | */ | |
41 | ||
42 | void sun4m_init_smp(void); | |
43 | void sun4d_init_smp(void); | |
44 | ||
45 | void smp_callin(void); | |
46 | void smp_boot_cpus(void); | |
47 | void smp_store_cpu_info(int); | |
48 | ||
49 | struct seq_file; | |
50 | void smp_bogo(struct seq_file *); | |
51 | void smp_info(struct seq_file *); | |
52 | ||
53 | BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) | |
1da177e4 LT |
54 | BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void) |
55 | BTFIXUPDEF_BLACKBOX(hard_smp_processor_id) | |
56 | BTFIXUPDEF_BLACKBOX(load_current) | |
57 | ||
58 | #define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5) | |
1da177e4 | 59 | |
3115624e AB |
60 | static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); } |
61 | static inline void xc1(smpfunc_t func, unsigned long arg1) | |
1da177e4 | 62 | { smp_cross_call(func, arg1, 0, 0, 0, 0); } |
3115624e | 63 | static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) |
1da177e4 | 64 | { smp_cross_call(func, arg1, arg2, 0, 0, 0); } |
3115624e | 65 | static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2, |
1da177e4 LT |
66 | unsigned long arg3) |
67 | { smp_cross_call(func, arg1, arg2, arg3, 0, 0); } | |
3115624e | 68 | static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2, |
1da177e4 LT |
69 | unsigned long arg3, unsigned long arg4) |
70 | { smp_cross_call(func, arg1, arg2, arg3, arg4, 0); } | |
3115624e | 71 | static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2, |
1da177e4 LT |
72 | unsigned long arg3, unsigned long arg4, unsigned long arg5) |
73 | { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); } | |
74 | ||
3115624e | 75 | static inline int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait) |
1da177e4 LT |
76 | { |
77 | xc1((smpfunc_t)func, (unsigned long)info); | |
78 | return 0; | |
79 | } | |
80 | ||
3115624e | 81 | static inline int cpu_logical_map(int cpu) |
1da177e4 | 82 | { |
a54123e2 | 83 | return cpu; |
1da177e4 LT |
84 | } |
85 | ||
3115624e | 86 | static inline int hard_smp4m_processor_id(void) |
1da177e4 LT |
87 | { |
88 | int cpuid; | |
89 | ||
90 | __asm__ __volatile__("rd %%tbr, %0\n\t" | |
91 | "srl %0, 12, %0\n\t" | |
92 | "and %0, 3, %0\n\t" : | |
93 | "=&r" (cpuid)); | |
94 | return cpuid; | |
95 | } | |
96 | ||
3115624e | 97 | static inline int hard_smp4d_processor_id(void) |
1da177e4 LT |
98 | { |
99 | int cpuid; | |
100 | ||
101 | __asm__ __volatile__("lda [%%g0] %1, %0\n\t" : | |
102 | "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1)); | |
103 | return cpuid; | |
104 | } | |
105 | ||
106 | #ifndef MODULE | |
3115624e | 107 | static inline int hard_smp_processor_id(void) |
1da177e4 LT |
108 | { |
109 | int cpuid; | |
110 | ||
111 | /* Black box - sun4m | |
112 | __asm__ __volatile__("rd %%tbr, %0\n\t" | |
113 | "srl %0, 12, %0\n\t" | |
114 | "and %0, 3, %0\n\t" : | |
115 | "=&r" (cpuid)); | |
116 | - sun4d | |
117 | __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t" | |
118 | "nop; nop" : | |
119 | "=&r" (cpuid)); | |
120 | See btfixup.h and btfixupprep.c to understand how a blackbox works. | |
121 | */ | |
122 | __asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t" | |
123 | "sethi %%hi(boot_cpu_id), %0\n\t" | |
124 | "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" : | |
125 | "=&r" (cpuid)); | |
126 | return cpuid; | |
127 | } | |
128 | #else | |
3115624e | 129 | static inline int hard_smp_processor_id(void) |
1da177e4 LT |
130 | { |
131 | int cpuid; | |
132 | ||
133 | __asm__ __volatile__("mov %%o7, %%g1\n\t" | |
134 | "call ___f___hard_smp_processor_id\n\t" | |
135 | " nop\n\t" | |
136 | "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2"); | |
137 | return cpuid; | |
138 | } | |
139 | #endif | |
140 | ||
39c715b7 | 141 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
1da177e4 LT |
142 | |
143 | #define prof_multiplier(__cpu) cpu_data(__cpu).multiplier | |
144 | #define prof_counter(__cpu) cpu_data(__cpu).counter | |
145 | ||
7202fb49 BB |
146 | void smp_setup_cpu_possible_map(void); |
147 | ||
1da177e4 LT |
148 | #endif /* !(__ASSEMBLY__) */ |
149 | ||
150 | /* Sparc specific messages. */ | |
151 | #define MSG_CROSS_CALL 0x0005 /* run func on cpus */ | |
152 | ||
153 | /* Empirical PROM processor mailbox constants. If the per-cpu mailbox | |
154 | * contains something other than one of these then the ipi is from | |
155 | * Linux's active_kernel_processor. This facility exists so that | |
156 | * the boot monitor can capture all the other cpus when one catches | |
157 | * a watchdog reset or the user enters the monitor using L1-A keys. | |
158 | */ | |
159 | #define MBOX_STOPCPU 0xFB | |
160 | #define MBOX_IDLECPU 0xFC | |
161 | #define MBOX_IDLECPU2 0xFD | |
162 | #define MBOX_STOPCPU2 0xFE | |
163 | ||
7202fb49 BB |
164 | #else /* SMP */ |
165 | ||
2f4dfe20 | 166 | #define hard_smp_processor_id() 0 |
7202fb49 BB |
167 | #define smp_setup_cpu_possible_map() do { } while (0) |
168 | ||
169 | #endif /* !(SMP) */ | |
1da177e4 LT |
170 | |
171 | #define NO_PROC_ID 0xFF | |
172 | ||
173 | #endif /* !(_SPARC_SMP_H) */ |