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90587a41 | 1 | /* |
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2 | * Copyright (c) 1992, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
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4 | * |
5 | * This software was developed by the Computer Systems Engineering group | |
6 | * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and | |
7 | * contributed to Berkeley. | |
8 | * | |
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9 | * All advertising materials mentioning features or use of this software |
10 | * must display the following acknowledgement: | |
11 | * This product includes software developed by the University of | |
062bb472 | 12 | * California, Lawrence Berkeley Laboratory. |
b480239a | 13 | * |
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14 | * %sccs.include.redist.c% |
15 | * | |
660038a9 | 16 | * @(#)cpu.h 8.5 (Berkeley) %G% |
90587a41 | 17 | * |
42158806 | 18 | * from: $Header: cpu.h,v 1.12 93/05/25 10:36:34 torek Exp $ (LBL) |
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19 | */ |
20 | ||
21 | #ifndef _CPU_H_ | |
22 | #define _CPU_H_ | |
23 | ||
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24 | /* |
25 | * CTL_MACHDEP definitinos. | |
26 | */ | |
27 | #define CPU_MAXID 1 /* no valid machdep ids */ | |
28 | ||
29 | #define CTL_MACHDEP_NAMES { \ | |
30 | { 0, 0 }, \ | |
31 | } | |
90587a41 | 32 | |
42158806 | 33 | #ifdef KERNEL |
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34 | /* |
35 | * Exported definitions unique to SPARC cpu support. | |
36 | */ | |
37 | ||
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38 | #include <machine/psl.h> |
39 | #include <sparc/sparc/intreg.h> | |
40 | ||
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41 | /* |
42 | * definitions of cpu-dependent requirements | |
43 | * referenced in generic code | |
44 | */ | |
45 | #define COPY_SIGCODE /* copy sigcode above user stack in exec */ | |
46 | ||
301d335f | 47 | #define cpu_exec(p) /* nothing */ |
0d5163d6 | 48 | #define cpu_swapin(p) /* nothing */ |
301d335f | 49 | #define cpu_wait(p) /* nothing */ |
90587a41 | 50 | #define cpu_setstack(p, ap) ((p)->p_md.md_tf->tf_out[6] = (ap) - 64) |
660038a9 | 51 | #define BACKTRACE(p) /* not implemented */ |
90587a41 | 52 | |
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53 | /* |
54 | * See syscall() for an explanation of the following. Note that the | |
55 | * locore bootstrap code follows the syscall stack protocol. The | |
56 | * framep argument is unused. | |
57 | */ | |
58 | #define cpu_set_init_frame(p, fp) \ | |
59 | (p)->p_md.md_tf = (struct trapframe *) \ | |
60 | ((caddr_t)(p)->p_addr + UPAGES * NBPG - sizeof(struct trapframe)) | |
61 | ||
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62 | /* |
63 | * Arguments to hardclock, softclock and gatherstats encapsulate the | |
64 | * previous machine state in an opaque clockframe. The ipl is here | |
65 | * as well for strayintr (see locore.s:interrupt and intr.c:strayintr). | |
66 | * Note that CLKF_INTR is valid only if CLKF_USERMODE is false. | |
67 | */ | |
68 | struct clockframe { | |
69 | u_int psr; /* psr before interrupt, excluding PSR_ET */ | |
70 | u_int pc; /* pc at interrupt */ | |
71 | u_int npc; /* npc at interrupt */ | |
72 | u_int ipl; /* actual interrupt priority level */ | |
73 | u_int fp; /* %fp at interrupt */ | |
74 | }; | |
75 | ||
76 | extern int eintstack[]; | |
77 | ||
78 | #define CLKF_USERMODE(framep) (((framep)->psr & PSR_PS) == 0) | |
79 | #define CLKF_BASEPRI(framep) (((framep)->psr & PSR_PIL) == 0) | |
80 | #define CLKF_PC(framep) ((framep)->pc) | |
81 | #define CLKF_INTR(framep) ((framep)->fp < (u_int)eintstack) | |
82 | ||
83 | /* | |
84 | * Software interrupt request `register'. | |
85 | */ | |
86 | union sir { | |
87 | int sir_any; | |
88 | char sir_which[4]; | |
89 | } sir; | |
90 | ||
91 | #define SIR_NET 0 | |
92 | #define SIR_CLOCK 1 | |
93 | ||
94 | #define setsoftint() ienab_bis(IE_L1) | |
95 | #define setsoftnet() (sir.sir_which[SIR_NET] = 1, setsoftint()) | |
96 | #define setsoftclock() (sir.sir_which[SIR_CLOCK] = 1, setsoftint()) | |
97 | ||
98 | int want_ast; | |
99 | ||
100 | /* | |
101 | * Preempt the current process if in interrupt from user mode, | |
102 | * or after the current trap/syscall if in system mode. | |
103 | */ | |
104 | int want_resched; /* resched() was called */ | |
105 | #define need_resched() (want_resched = 1, want_ast = 1) | |
106 | ||
107 | /* | |
108 | * Give a profiling tick to the current process when the user profiling | |
109 | * buffer pages are invalid. On the sparc, request an ast to send us | |
110 | * through trap(), marking the proc as needing a profiling tick. | |
111 | */ | |
cf5ef508 | 112 | #define need_proftick(p) ((p)->p_flag |= P_OWEUPC, want_ast = 1) |
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113 | |
114 | /* | |
115 | * Notify the current process (p) that it has a signal pending, | |
116 | * process as soon as possible. | |
117 | */ | |
118 | #define signotify(p) (want_ast = 1) | |
119 | ||
120 | /* | |
121 | * Only one process may own the FPU state. | |
122 | * | |
123 | * XXX this must be per-cpu (eventually) | |
124 | */ | |
125 | struct proc *fpproc; /* FPU owner */ | |
126 | int foundfpu; /* true => we have an FPU */ | |
127 | ||
128 | /* | |
129 | * Interrupt handler chains. Interrupt handlers should return 0 for | |
130 | * ``not me'' or 1 (``I took care of it''). intr_establish() inserts a | |
131 | * handler into the list. The handler is called with its (single) | |
132 | * argument, or with a pointer to a clockframe if ih_arg is NULL. | |
133 | */ | |
134 | struct intrhand { | |
135 | int (*ih_fun) __P((void *)); | |
136 | void *ih_arg; | |
137 | struct intrhand *ih_next; | |
138 | } *intrhand[15]; | |
139 | ||
140 | void intr_establish __P((int level, struct intrhand *)); | |
141 | ||
142 | /* | |
143 | * intr_fasttrap() is a lot like intr_establish, but is used for ``fast'' | |
144 | * interrupt vectors (vectors that are not shared and are handled in the | |
145 | * trap window). Such functions must be written in assembly. | |
146 | */ | |
147 | void intr_fasttrap __P((int level, void (*vec)(void))); | |
148 | ||
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149 | #endif /* KERNEL */ |
150 | #endif /* _CPU_H_ */ |