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/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
31extern unsigned char boot_cpu_id;
32extern cpumask_t phys_cpu_present_map;
33#define cpu_possible_map phys_cpu_present_map
34
35typedef 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
42void sun4m_init_smp(void);
43void sun4d_init_smp(void);
44
45void smp_callin(void);
46void smp_boot_cpus(void);
47void smp_store_cpu_info(int);
48
49struct seq_file;
50void smp_bogo(struct seq_file *);
51void smp_info(struct seq_file *);
52
53BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)
54BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int)
55BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
56BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
57BTFIXUPDEF_BLACKBOX(load_current)
58
59#define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5)
60#define smp_message_pass(target,msg,data,wait) BTFIXUP_CALL(smp_message_pass)(target,msg,data,wait)
61
62static inline void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); }
63static inline void xc1(smpfunc_t func, unsigned long arg1)
64{ smp_cross_call(func, arg1, 0, 0, 0, 0); }
65static inline void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2)
66{ smp_cross_call(func, arg1, arg2, 0, 0, 0); }
67static inline void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2,
68			   unsigned long arg3)
69{ smp_cross_call(func, arg1, arg2, arg3, 0, 0); }
70static inline void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2,
71			   unsigned long arg3, unsigned long arg4)
72{ smp_cross_call(func, arg1, arg2, arg3, arg4, 0); }
73static inline void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2,
74			   unsigned long arg3, unsigned long arg4, unsigned long arg5)
75{ smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); }
76
77static inline int smp_call_function(void (*func)(void *info), void *info, int nonatomic, int wait)
78{
79	xc1((smpfunc_t)func, (unsigned long)info);
80	return 0;
81}
82
83static inline int cpu_logical_map(int cpu)
84{
85	return cpu;
86}
87
88static inline int hard_smp4m_processor_id(void)
89{
90	int cpuid;
91
92	__asm__ __volatile__("rd %%tbr, %0\n\t"
93			     "srl %0, 12, %0\n\t"
94			     "and %0, 3, %0\n\t" :
95			     "=&r" (cpuid));
96	return cpuid;
97}
98
99static inline int hard_smp4d_processor_id(void)
100{
101	int cpuid;
102
103	__asm__ __volatile__("lda [%%g0] %1, %0\n\t" :
104			     "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1));
105	return cpuid;
106}
107
108#ifndef MODULE
109static inline int hard_smp_processor_id(void)
110{
111	int cpuid;
112
113	/* Black box - sun4m
114		__asm__ __volatile__("rd %%tbr, %0\n\t"
115				     "srl %0, 12, %0\n\t"
116				     "and %0, 3, %0\n\t" :
117				     "=&r" (cpuid));
118	             - sun4d
119	   	__asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"
120	   			     "nop; nop" :
121	   			     "=&r" (cpuid));
122	   See btfixup.h and btfixupprep.c to understand how a blackbox works.
123	 */
124	__asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
125			     "sethi %%hi(boot_cpu_id), %0\n\t"
126			     "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
127			     "=&r" (cpuid));
128	return cpuid;
129}
130#else
131static inline int hard_smp_processor_id(void)
132{
133	int cpuid;
134
135	__asm__ __volatile__("mov %%o7, %%g1\n\t"
136			     "call ___f___hard_smp_processor_id\n\t"
137			     " nop\n\t"
138			     "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
139	return cpuid;
140}
141#endif
142
143#define raw_smp_processor_id()		(current_thread_info()->cpu)
144
145#define prof_multiplier(__cpu)		cpu_data(__cpu).multiplier
146#define prof_counter(__cpu)		cpu_data(__cpu).counter
147
148void smp_setup_cpu_possible_map(void);
149
150#endif /* !(__ASSEMBLY__) */
151
152/* Sparc specific messages. */
153#define MSG_CROSS_CALL         0x0005       /* run func on cpus */
154
155/* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
156 * contains something other than one of these then the ipi is from
157 * Linux's active_kernel_processor.  This facility exists so that
158 * the boot monitor can capture all the other cpus when one catches
159 * a watchdog reset or the user enters the monitor using L1-A keys.
160 */
161#define MBOX_STOPCPU          0xFB
162#define MBOX_IDLECPU          0xFC
163#define MBOX_IDLECPU2         0xFD
164#define MBOX_STOPCPU2         0xFE
165
166#else /* SMP */
167
168#define hard_smp_processor_id()		0
169#define smp_setup_cpu_possible_map() do { } while (0)
170
171#endif /* !(SMP) */
172
173#define NO_PROC_ID            0xFF
174
175#endif /* !(_SPARC_SMP_H) */
176