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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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
Adrian Bunk31156242005-10-03 17:37:02 -070063static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); }
64static inline void xc1(smpfunc_t func, unsigned long arg1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{ smp_cross_call(func, arg1, 0, 0, 0, 0); }
Adrian Bunk31156242005-10-03 17:37:02 -070066static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
Linus Torvalds1da177e2005-04-16 15:20:36 -070067{ smp_cross_call(func, arg1, arg2, 0, 0, 0); }
Adrian Bunk31156242005-10-03 17:37:02 -070068static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 unsigned long arg3)
70{ smp_cross_call(func, arg1, arg2, arg3, 0, 0); }
Adrian Bunk31156242005-10-03 17:37:02 -070071static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 unsigned long arg3, unsigned long arg4)
73{ smp_cross_call(func, arg1, arg2, arg3, arg4, 0); }
Adrian Bunk31156242005-10-03 17:37:02 -070074static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2,
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 unsigned long arg3, unsigned long arg4, unsigned long arg5)
76{ smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); }
77
Adrian Bunk31156242005-10-03 17:37:02 -070078static inline int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079{
80 xc1((smpfunc_t)func, (unsigned long)info);
81 return 0;
82}
83
Adrian Bunk31156242005-10-03 17:37:02 -070084static inline int cpu_logical_map(int cpu)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085{
Bob Breuera54123e2006-03-23 22:36:19 -080086 return cpu;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087}
88
Adrian Bunk31156242005-10-03 17:37:02 -070089static inline int hard_smp4m_processor_id(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 int cpuid;
92
93 __asm__ __volatile__("rd %%tbr, %0\n\t"
94 "srl %0, 12, %0\n\t"
95 "and %0, 3, %0\n\t" :
96 "=&r" (cpuid));
97 return cpuid;
98}
99
Adrian Bunk31156242005-10-03 17:37:02 -0700100static inline int hard_smp4d_processor_id(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101{
102 int cpuid;
103
104 __asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
105 "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
106 return cpuid;
107}
108
109#ifndef MODULE
Adrian Bunk31156242005-10-03 17:37:02 -0700110static inline int hard_smp_processor_id(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
112 int cpuid;
113
114 /* Black box - sun4m
115 __asm__ __volatile__("rd %%tbr, %0\n\t"
116 "srl %0, 12, %0\n\t"
117 "and %0, 3, %0\n\t" :
118 "=&r" (cpuid));
119 - sun4d
120 __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
121 "nop; nop" :
122 "=&r" (cpuid));
123 See btfixup.h and btfixupprep.c to understand how a blackbox works.
124 */
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" :
128 "=&r" (cpuid));
129 return cpuid;
130}
131#else
Adrian Bunk31156242005-10-03 17:37:02 -0700132static inline int hard_smp_processor_id(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133{
134 int cpuid;
135
136 __asm__ __volatile__("mov %%o7, %%g1\n\t"
137 "call ___f___hard_smp_processor_id\n\t"
138 " nop\n\t"
139 "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
140 return cpuid;
141}
142#endif
143
Ingo Molnar39c715b2005-06-21 17:14:34 -0700144#define raw_smp_processor_id() (current_thread_info()->cpu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146#define prof_multiplier(__cpu) cpu_data(__cpu).multiplier
147#define prof_counter(__cpu) cpu_data(__cpu).counter
148
149#endif /* !(__ASSEMBLY__) */
150
151/* Sparc specific messages. */
152#define MSG_CROSS_CALL 0x0005 /* run func on cpus */
153
154/* Empirical PROM processor mailbox constants. If the per-cpu mailbox
155 * contains something other than one of these then the ipi is from
156 * Linux's active_kernel_processor. This facility exists so that
157 * the boot monitor can capture all the other cpus when one catches
158 * a watchdog reset or the user enters the monitor using L1-A keys.
159 */
160#define MBOX_STOPCPU 0xFB
161#define MBOX_IDLECPU 0xFC
162#define MBOX_IDLECPU2 0xFD
163#define MBOX_STOPCPU2 0xFE
164
165#endif /* SMP */
166
167#define NO_PROC_ID 0xFF
168
169#endif /* !(_SPARC_SMP_H) */