1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)cpu.h 5.4 (Berkeley) 5/9/91
| 1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)cpu.h 5.4 (Berkeley) 5/9/91
|
37 * $FreeBSD: head/sys/i386/include/cpu.h 71530 2001-01-24 09:56:49Z jhb $
| 37 * $FreeBSD: head/sys/i386/include/cpu.h 72200 2001-02-09 06:11:45Z bmilekic $
|
38 */
39
40#ifndef _MACHINE_CPU_H_
41#define _MACHINE_CPU_H_
42
43/*
44 * Definitions unique to i386 cpu support.
45 */
46#include <machine/psl.h>
47#include <machine/frame.h>
48#include <machine/segments.h>
49#include <machine/globals.h>
50
51/*
52 * definitions of cpu-dependent requirements
53 * referenced in generic code
54 */
55#undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */
56
57#define cpu_exec(p) /* nothing */
58#define cpu_swapin(p) /* nothing */
59#define cpu_getstack(p) ((p)->p_md.md_regs->tf_esp)
60#define cpu_setstack(p, ap) ((p)->p_md.md_regs->tf_esp = (ap))
61
62#define CLKF_USERMODE(framep) \
63 ((ISPL((framep)->cf_cs) == SEL_UPL) || (framep->cf_eflags & PSL_VM))
64
65#define CLKF_INTR(framep) (curproc->p_intr_nesting_level >= 2)
66#define CLKF_PC(framep) ((framep)->cf_eip)
67
68/*
69 * astpending bits
70 */
71#define AST_PENDING 0x00000001
72#define AST_RESCHED 0x00000002
73
74/*
75 * Preempt the current process if in interrupt from user mode,
76 * or after the current trap/syscall if in system mode.
77 *
78 * XXX: if astpending is later changed to an |= here due to more flags being
79 * added, we will have an atomicy problem. The type of atomicy we need is
80 * a non-locked orl.
81 */
82#define need_resched() do { \
83 PCPU_SET(astpending, AST_RESCHED|AST_PENDING); \
84} while (0)
85#define resched_wanted() (PCPU_GET(astpending) & AST_RESCHED)
86
87/*
88 * Arrange to handle pending profiling ticks before returning to user mode.
89 *
90 * XXX this is now poorly named and implemented. It used to handle only a
91 * single tick and the PS_OWEUPC flag served as a counter. Now there is a
92 * counter in the proc table and flag isn't really necessary.
93 */
94#define need_proftick(p) do { \
| 38 */
39
40#ifndef _MACHINE_CPU_H_
41#define _MACHINE_CPU_H_
42
43/*
44 * Definitions unique to i386 cpu support.
45 */
46#include <machine/psl.h>
47#include <machine/frame.h>
48#include <machine/segments.h>
49#include <machine/globals.h>
50
51/*
52 * definitions of cpu-dependent requirements
53 * referenced in generic code
54 */
55#undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */
56
57#define cpu_exec(p) /* nothing */
58#define cpu_swapin(p) /* nothing */
59#define cpu_getstack(p) ((p)->p_md.md_regs->tf_esp)
60#define cpu_setstack(p, ap) ((p)->p_md.md_regs->tf_esp = (ap))
61
62#define CLKF_USERMODE(framep) \
63 ((ISPL((framep)->cf_cs) == SEL_UPL) || (framep->cf_eflags & PSL_VM))
64
65#define CLKF_INTR(framep) (curproc->p_intr_nesting_level >= 2)
66#define CLKF_PC(framep) ((framep)->cf_eip)
67
68/*
69 * astpending bits
70 */
71#define AST_PENDING 0x00000001
72#define AST_RESCHED 0x00000002
73
74/*
75 * Preempt the current process if in interrupt from user mode,
76 * or after the current trap/syscall if in system mode.
77 *
78 * XXX: if astpending is later changed to an |= here due to more flags being
79 * added, we will have an atomicy problem. The type of atomicy we need is
80 * a non-locked orl.
81 */
82#define need_resched() do { \
83 PCPU_SET(astpending, AST_RESCHED|AST_PENDING); \
84} while (0)
85#define resched_wanted() (PCPU_GET(astpending) & AST_RESCHED)
86
87/*
88 * Arrange to handle pending profiling ticks before returning to user mode.
89 *
90 * XXX this is now poorly named and implemented. It used to handle only a
91 * single tick and the PS_OWEUPC flag served as a counter. Now there is a
92 * counter in the proc table and flag isn't really necessary.
93 */
94#define need_proftick(p) do { \
|
95 mtx_enter(&sched_lock, MTX_SPIN); \
| 95 mtx_lock_spin(&sched_lock); \
|
96 (p)->p_sflag |= PS_OWEUPC; \
| 96 (p)->p_sflag |= PS_OWEUPC; \
|
97 mtx_exit(&sched_lock, MTX_SPIN); \
| 97 mtx_unlock_spin(&sched_lock); \
|
98 aston(); \
99} while (0)
100
101/*
102 * Notify the current process (p) that it has a signal pending,
103 * process as soon as possible.
104 *
105 * XXX: aston() really needs to be an atomic (not locked, but an orl),
106 * in case need_resched() is set by an interrupt. But with astpending a
107 * per-cpu variable this is not trivial to do efficiently. For now we blow
108 * it off (asynchronous need_resched() conflicts are not critical).
109 */
110#define signotify(p) aston()
111#define aston() do { \
112 PCPU_SET(astpending, PCPU_GET(astpending) | AST_PENDING); \
113} while (0)
114#define astoff()
115
116/*
117 * CTL_MACHDEP definitions.
118 */
119#define CPU_CONSDEV 1 /* dev_t: console terminal device */
120#define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */
121#define CPU_DISRTCSET 3 /* int: disable resettodr() call */
122#define CPU_BOOTINFO 4 /* struct: bootinfo */
123#define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */
124#define CPU_MAXID 6 /* number of valid machdep ids */
125
126#define CTL_MACHDEP_NAMES { \
127 { 0, 0 }, \
128 { "console_device", CTLTYPE_STRUCT }, \
129 { "adjkerntz", CTLTYPE_INT }, \
130 { "disable_rtc_set", CTLTYPE_INT }, \
131 { "bootinfo", CTLTYPE_STRUCT }, \
132 { "wall_cmos_clock", CTLTYPE_INT }, \
133}
134
135#ifdef _KERNEL
136extern char btext[];
137extern char etext[];
138
139void fork_trampoline __P((void));
140
141#if defined(I386_CPU) || defined(I486_CPU)
142extern u_int tsc_present;
143#endif
144
145/*
146 * Return contents of in-cpu fast counter as a sort of "bogo-time"
147 * for non-critical timing.
148 */
149static __inline u_int64_t
150get_cyclecount(void)
151{
152#if defined(I386_CPU) || defined(I486_CPU)
153 struct timespec tv;
154
155 if (!tsc_present) {
156 nanotime(&tv);
157 return (tv.tv_sec * (u_int64_t)1000000000 + tv.tv_nsec);
158 }
159#endif
160 return (rdtsc());
161}
162
163#endif
164
165#endif /* !_MACHINE_CPU_H_ */
| 98 aston(); \
99} while (0)
100
101/*
102 * Notify the current process (p) that it has a signal pending,
103 * process as soon as possible.
104 *
105 * XXX: aston() really needs to be an atomic (not locked, but an orl),
106 * in case need_resched() is set by an interrupt. But with astpending a
107 * per-cpu variable this is not trivial to do efficiently. For now we blow
108 * it off (asynchronous need_resched() conflicts are not critical).
109 */
110#define signotify(p) aston()
111#define aston() do { \
112 PCPU_SET(astpending, PCPU_GET(astpending) | AST_PENDING); \
113} while (0)
114#define astoff()
115
116/*
117 * CTL_MACHDEP definitions.
118 */
119#define CPU_CONSDEV 1 /* dev_t: console terminal device */
120#define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */
121#define CPU_DISRTCSET 3 /* int: disable resettodr() call */
122#define CPU_BOOTINFO 4 /* struct: bootinfo */
123#define CPU_WALLCLOCK 5 /* int: indicates wall CMOS clock */
124#define CPU_MAXID 6 /* number of valid machdep ids */
125
126#define CTL_MACHDEP_NAMES { \
127 { 0, 0 }, \
128 { "console_device", CTLTYPE_STRUCT }, \
129 { "adjkerntz", CTLTYPE_INT }, \
130 { "disable_rtc_set", CTLTYPE_INT }, \
131 { "bootinfo", CTLTYPE_STRUCT }, \
132 { "wall_cmos_clock", CTLTYPE_INT }, \
133}
134
135#ifdef _KERNEL
136extern char btext[];
137extern char etext[];
138
139void fork_trampoline __P((void));
140
141#if defined(I386_CPU) || defined(I486_CPU)
142extern u_int tsc_present;
143#endif
144
145/*
146 * Return contents of in-cpu fast counter as a sort of "bogo-time"
147 * for non-critical timing.
148 */
149static __inline u_int64_t
150get_cyclecount(void)
151{
152#if defined(I386_CPU) || defined(I486_CPU)
153 struct timespec tv;
154
155 if (!tsc_present) {
156 nanotime(&tv);
157 return (tv.tv_sec * (u_int64_t)1000000000 + tv.tv_nsec);
158 }
159#endif
160 return (rdtsc());
161}
162
163#endif
164
165#endif /* !_MACHINE_CPU_H_ */
|