kernel: Make SMP support default (and non-optional).
[dragonfly.git] / sys / cpu / i386 / include / profile.h
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1/*
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)profile.h 8.1 (Berkeley) 6/11/93
34 * $FreeBSD: src/sys/i386/include/profile.h,v 1.20 1999/12/29 04:33:05 peter Exp $
35 */
36
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37#ifndef _CPU_PROFILE_H_
38#define _CPU_PROFILE_H_
984263bc 39
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40#ifndef _SYS_CDEFS_H_
41#include <sys/cdefs.h>
42#endif
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43#ifndef _SYS_TYPES_H_
44#include <sys/types.h>
45#endif
46
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47#ifdef _KERNEL
48
49/*
50 * Config generates something to tell the compiler to align functions on 16
51 * byte boundaries. A strict alignment is good for keeping the tables small.
52 */
53#define FUNCTION_ALIGNMENT 16
54
55/*
56 * The kernel uses assembler stubs instead of unportable inlines.
57 * This is mainly to save a little time when profiling is not enabled,
58 * which is the usual case for the kernel.
59 */
60#define _MCOUNT_DECL void mcount
61#define MCOUNT
62
63#ifdef GUPROF
64#define CALIB_SCALE 1000
65#define KCOUNT(p,index) ((p)->kcount[(index) \
66 / (HISTFRACTION * sizeof(HISTCOUNTER))])
67#define MCOUNT_DECL(s)
68#define MCOUNT_ENTER(s)
69#define MCOUNT_EXIT(s)
70#define PC_TO_I(p, pc) ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc)
71#else
72#define MCOUNT_DECL(s) u_long s;
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73struct spinlock_deprecated;
74extern struct spinlock_deprecated mcount_spinlock;
75void spin_lock_np(struct spinlock_deprecated *sp);
76void spin_unlock_np(struct spinlock_deprecated *sp);
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77#define MCOUNT_ENTER(s) { s = read_eflags(); \
78 __asm __volatile("cli" : : : "memory"); \
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79 spin_lock_np(&mcount_spinlock); }
80#define MCOUNT_EXIT(s) { spin_unlock_np(&mcount_spinlock); write_eflags(s); }
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81#endif /* GUPROF */
82
83#else /* !_KERNEL */
84
85#define FUNCTION_ALIGNMENT 4
86
87#define _MCOUNT_DECL static __inline void _mcount
88
89#define MCOUNT \
90void \
09e6e929 91mcount(void) \
984263bc 92{ \
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93 register int c asm("ecx"); \
94 register int d asm("edx"); \
95 register int a asm("eax"); \
984263bc 96 uintfptr_t selfpc, frompc; \
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97 /* \
98 * mcount can't trash any registers, but _mcount \
99 * follows the i386 abi and considers eax, ecx and \
100 * edx caller-saved. We're the caller, so save them \
101 * here. \
102 */ \
103 asm("push %%ecx" : : "r" (c) : "memory"); \
104 asm("push %%edx" : : "r" (d): "memory"); \
105 asm("push %%eax" : : "r" (a) : "memory"); \
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106 /* \
107 * Find the return address for mcount, \
108 * and the return address for mcount's caller. \
109 * \
110 * selfpc = pc pushed by call to mcount \
111 */ \
112 asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
113 /* \
114 * frompc = pc pushed by call to mcount's caller. \
115 * The caller's stack frame has already been built, so %ebp is \
116 * the caller's frame pointer. The caller's raddr is in the \
117 * caller's frame following the caller's caller's frame pointer. \
118 */ \
119 asm("movl (%%ebp),%0" : "=r" (frompc)); \
120 frompc = ((uintfptr_t *)frompc)[1]; \
121 _mcount(frompc, selfpc); \
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122 /* restore the registers that _mcount possibly trashed */ \
123 asm volatile ("pop %%eax" : "=r" (a) : ); \
124 asm volatile ("pop %%edx" : "=r" (d) : ); \
125 asm volatile ("pop %%ecx" : "=r" (c) : ); \
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126}
127
128typedef unsigned int uintfptr_t;
129
130#endif /* _KERNEL */
131
132/*
133 * An unsigned integral type that can hold non-negative difference between
134 * function pointers.
135 */
136typedef u_int fptrdiff_t;
137
138#ifdef _KERNEL
139
3ae0cd58 140void mcount (uintfptr_t frompc, uintfptr_t selfpc);
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141
142#ifdef GUPROF
143struct gmonparam;
144
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145void nullfunc_loop_profiled (void);
146void nullfunc_profiled (void);
147void startguprof (struct gmonparam *p);
148void stopguprof (struct gmonparam *p);
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149#else
150#define startguprof(p)
151#define stopguprof(p)
152#endif /* GUPROF */
153
154#else /* !_KERNEL */
155
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156__BEGIN_DECLS
157#ifdef __GNUC__
3ae0cd58 158void mcount (void) __asm(".mcount");
984263bc 159#endif
03d6a592 160/*static void _mcount (uintfptr_t frompc, uintfptr_t selfpc);*/
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161__END_DECLS
162
163#endif /* _KERNEL */
164
165#ifdef GUPROF
166/* XXX doesn't quite work outside kernel yet. */
167extern int cputime_bias;
168
169__BEGIN_DECLS
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170int cputime (void);
171void empty_loop (void);
172void mexitcount (uintfptr_t selfpc);
173void nullfunc (void);
174void nullfunc_loop (void);
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175__END_DECLS
176#endif
177
88181b08 178#endif /* !_CPU_PROFILE_H_ */