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28a753c6 WJ |
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 | * @(#)cpu.h 5.4 (Berkeley) 5/9/91 | |
37 | */ | |
38 | ||
39 | /* | |
40 | * Definitions unique to i386 cpu support. | |
41 | */ | |
42 | #include "machine/frame.h" | |
43 | #include "machine/segments.h" | |
44 | ||
45 | /* | |
46 | * definitions of cpu-dependent requirements | |
47 | * referenced in generic code | |
48 | */ | |
49 | #undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */ | |
50 | ||
51 | /* | |
52 | * function vs. inline configuration; | |
53 | * these are defined to get generic functions | |
54 | * rather than inline or machine-dependent implementations | |
55 | */ | |
56 | #define NEED_MINMAX /* need {,i,l,ul}{min,max} functions */ | |
57 | #define NEED_FFS /* need ffs function */ | |
58 | #define NEED_BCMP /* need bcmp function */ | |
59 | #define NEED_STRLEN /* need strlen function */ | |
60 | ||
61 | #define cpu_exec(p) /* nothing */ | |
62 | ||
63 | /* | |
64 | * Arguments to hardclock, softclock and gatherstats | |
65 | * encapsulate the previous machine state in an opaque | |
66 | * clockframe; for now, use generic intrframe. | |
67 | */ | |
68 | typedef struct intrframe clockframe; | |
69 | ||
70 | #define CLKF_USERMODE(framep) (ISPL((framep)->if_cs) == SEL_UPL) | |
71 | #define CLKF_BASEPRI(framep) ((framep)->if_ppl == 0) | |
72 | #define CLKF_PC(framep) ((framep)->if_eip) | |
73 | ||
74 | #define resettodr() /* no todr to set */ | |
75 | ||
76 | /* | |
77 | * Preempt the current process if in interrupt from user mode, | |
78 | * or after the current trap/syscall if in system mode. | |
79 | */ | |
80 | #define need_resched() { want_resched++; aston(); } | |
81 | ||
82 | /* | |
83 | * Give a profiling tick to the current process from the softclock | |
84 | * interrupt. On tahoe, request an ast to send us through trap(), | |
85 | * marking the proc as needing a profiling tick. | |
86 | */ | |
87 | #define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); } | |
88 | ||
89 | /* | |
90 | * Notify the current process (p) that it has a signal pending, | |
91 | * process as soon as possible. | |
92 | */ | |
93 | #define signotify(p) aston() | |
94 | ||
95 | #define aston() (astpending++) | |
96 | ||
97 | int astpending; /* need to trap before returning to user mode */ | |
98 | int want_resched; /* resched() was called */ | |
99 | ||
100 | /* | |
101 | * Kinds of processor | |
102 | */ | |
103 | ||
104 | #define CPU_386SX 0 | |
105 | #define CPU_386 1 | |
106 | #define CPU_486SX 2 | |
107 | #define CPU_486 3 | |
108 | #define CPU_586 4 |