cpu.h revision 1.31 1 /* $NetBSD: cpu.h,v 1.31 1999/08/10 21:08:05 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * from: Utah $Hdr: cpu.h 1.16 91/03/25$
41 *
42 * @(#)cpu.h 8.4 (Berkeley) 1/5/94
43 */
44
45 #ifndef _ALPHA_CPU_H_
46 #define _ALPHA_CPU_H_
47
48 /*
49 * Exported definitions unique to Alpha cpu support.
50 */
51
52 #include <machine/frame.h>
53
54 /*
55 * definitions of cpu-dependent requirements
56 * referenced in generic code
57 */
58 #define cpu_wait(p) /* nothing */
59 #define cpu_number() alpha_pal_whami()
60
61 /*
62 * Arguments to hardclock and gatherstats encapsulate the previous
63 * machine state in an opaque clockframe. One the Alpha, we use
64 * what we push on an interrupt (a trapframe).
65 */
66 struct clockframe {
67 struct trapframe cf_tf;
68 };
69 #define CLKF_USERMODE(framep) \
70 (((framep)->cf_tf.tf_regs[FRAME_PS] & ALPHA_PSL_USERMODE) != 0)
71 #define CLKF_BASEPRI(framep) \
72 (((framep)->cf_tf.tf_regs[FRAME_PS] & ALPHA_PSL_IPL_MASK) == 0)
73 #define CLKF_PC(framep) ((framep)->cf_tf.tf_regs[FRAME_PC])
74 /*
75 * XXX No way to accurately tell if we were in interrupt mode before taking
76 * clock interrupt.
77 */
78 #define CLKF_INTR(framep) (0)
79
80 /*
81 * Preempt the current process if in interrupt from user mode,
82 * or after the current trap/syscall if in system mode.
83 */
84 #define need_resched() { want_resched = 1; aston(); }
85
86 /*
87 * Give a profiling tick to the current process when the user profiling
88 * buffer pages are invalid. On the hp300, request an ast to send us
89 * through trap, marking the proc as needing a profiling tick.
90 */
91 #define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); }
92
93 /*
94 * Notify the current process (p) that it has a signal pending,
95 * process as soon as possible.
96 */
97 #define signotify(p) aston()
98
99 #define aston() (astpending = 1)
100
101 #ifdef _KERNEL
102 u_int64_t astpending; /* need to trap before returning to user mode */
103 u_int64_t want_resched; /* resched() was called */
104 #endif
105
106
107 /*
108 * CTL_MACHDEP definitions.
109 */
110 #define CPU_CONSDEV 1 /* dev_t: console terminal device */
111 #define CPU_ROOT_DEVICE 2 /* string: root device name */
112 #define CPU_UNALIGNED_PRINT 3 /* int: print unaligned accesses */
113 #define CPU_UNALIGNED_FIX 4 /* int: fix unaligned accesses */
114 #define CPU_UNALIGNED_SIGBUS 5 /* int: SIGBUS unaligned accesses */
115 #define CPU_BOOTED_KERNEL 6 /* string: booted kernel name */
116 #define CPU_MAXID 7 /* 6 valid machdep IDs */
117
118 #define CTL_MACHDEP_NAMES { \
119 { 0, 0 }, \
120 { "console_device", CTLTYPE_STRUCT }, \
121 { "root_device", CTLTYPE_STRING }, \
122 { "unaligned_print", CTLTYPE_INT }, \
123 { "unaligned_fix", CTLTYPE_INT }, \
124 { "unaligned_sigbus", CTLTYPE_INT }, \
125 { "booted_kernel", CTLTYPE_STRING }, \
126 }
127
128 #ifdef _KERNEL
129
130 struct pcb;
131 struct proc;
132 struct reg;
133 struct rpb;
134 struct trapframe;
135
136 extern int cold;
137
138 int badaddr __P((void *, size_t));
139
140 #endif /* _KERNEL */
141 #endif /* _ALPHA_CPU_H_ */
142