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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
32extern unsigned char boot_cpu_id;
33extern cpumask_t phys_cpu_present_map;
34#define cpu_possible_map phys_cpu_present_map
35
36typedef 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
43void sun4m_init_smp(void);
44void sun4d_init_smp(void);
45
46void smp_callin(void);
47void smp_boot_cpus(void);
48void smp_store_cpu_info(int);
49
50struct seq_file;
51void smp_bogo(struct seq_file *);
52void smp_info(struct seq_file *);
53
54BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)
55BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int)
56BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
57BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
58BTFIXUPDEF_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
63extern __inline__ void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); }
64extern __inline__ void xc1(smpfunc_t func, unsigned long arg1)
65{ smp_cross_call(func, arg1, 0, 0, 0, 0); }
66extern __inline__ void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
67{ smp_cross_call(func, arg1, arg2, 0, 0, 0); }
68extern __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); }
71extern __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); }
74extern __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
78extern __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
84extern __volatile__ int __cpu_number_map[NR_CPUS];
85extern __volatile__ int __cpu_logical_map[NR_CPUS];
86
87extern __inline__ int cpu_logical_map(int cpu)
88{
89 return __cpu_logical_map[cpu];
90}
91extern __inline__ int cpu_number_map(int cpu)
92{
93 return __cpu_number_map[cpu];
94}
95
96extern __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
107extern __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
117extern __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
139extern __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 raw_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) */