Commit | Line | Data |
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50a84b40 | 1 | /* subr_xxx.c 4.18 82/10/17 */ |
ae9e2121 BJ |
2 | |
3 | #include "../h/param.h" | |
4 | #include "../h/systm.h" | |
5 | #include "../h/conf.h" | |
6 | #include "../h/inode.h" | |
7 | #include "../h/dir.h" | |
8 | #include "../h/user.h" | |
9 | #include "../h/buf.h" | |
10 | #include "../h/proc.h" | |
6459ebe0 | 11 | #include "../h/fs.h" |
cb99a88a BJ |
12 | #include "../h/vm.h" |
13 | #include "../h/pte.h" | |
14 | #include "../h/cmap.h" | |
d6d7360b | 15 | #include "../h/uio.h" |
ae9e2121 | 16 | |
ae9e2121 | 17 | /* |
50a84b40 | 18 | * Routine placed in illegal entries in the bdevsw and cdevsw tables. |
ae9e2121 BJ |
19 | */ |
20 | nodev() | |
21 | { | |
22 | ||
50a84b40 | 23 | return (ENODEV); |
ae9e2121 BJ |
24 | } |
25 | ||
26 | /* | |
27 | * Null routine; placed in insignificant entries | |
28 | * in the bdevsw and cdevsw tables. | |
29 | */ | |
30 | nulldev() | |
31 | { | |
32 | ||
50a84b40 | 33 | return (0); |
ae9e2121 BJ |
34 | } |
35 | ||
36 | imin(a, b) | |
37 | { | |
38 | ||
39 | return (a < b ? a : b); | |
40 | } | |
41 | ||
42 | imax(a, b) | |
43 | { | |
44 | ||
45 | return (a > b ? a : b); | |
46 | } | |
47 | ||
6459ebe0 KM |
48 | unsigned |
49 | min(a, b) | |
50 | unsigned int a, b; | |
51 | { | |
52 | ||
53 | return (a < b ? a : b); | |
54 | } | |
55 | ||
56 | unsigned | |
57 | max(a, b) | |
58 | unsigned int a, b; | |
59 | { | |
60 | ||
61 | return (a > b ? a : b); | |
62 | } | |
cb99a88a BJ |
63 | extern cabase, calimit; |
64 | extern struct pte camap[]; | |
65 | ||
66 | caddr_t cacur = (caddr_t)&cabase; | |
67 | caddr_t camax = (caddr_t)&cabase; | |
68 | int cax = 0; | |
69 | /* | |
70 | * This is a kernel-mode storage allocator. | |
71 | * It is very primitive, currently, in that | |
72 | * there is no way to give space back. | |
73 | * It serves, for the time being, the needs of | |
74 | * auto-configuration code and the like which | |
75 | * need to allocate some stuff at boot time. | |
76 | */ | |
77 | caddr_t | |
78 | calloc(size) | |
79 | int size; | |
80 | { | |
81 | register caddr_t res; | |
82 | register int i; | |
83 | ||
84 | if (cacur+size >= (caddr_t)&calimit) | |
85 | panic("calloc"); | |
86 | while (cacur+size > camax) { | |
87 | (void) vmemall(&camap[cax], CLSIZE, &proc[0], CSYS); | |
88 | vmaccess(&camap[cax], camax, CLSIZE); | |
89 | for (i = 0; i < CLSIZE; i++) | |
90 | clearseg(camap[cax++].pg_pfnum); | |
91 | camax += NBPG * CLSIZE; | |
92 | } | |
93 | res = cacur; | |
94 | cacur += size; | |
95 | return (res); | |
96 | } | |
febd1daa | 97 | |
cb99a88a BJ |
98 | #ifndef vax |
99 | ffs(mask) | |
100 | register long mask; | |
101 | { | |
102 | register int i; | |
103 | ||
104 | for(i=1; i<NSIG; i++) { | |
105 | if (mask & 1) | |
106 | return (i); | |
107 | mask >>= 1; | |
108 | } | |
109 | return (0); | |
110 | } | |
febd1daa | 111 | |
4147b3f6 BJ |
112 | ffs(mask) |
113 | register long mask; | |
114 | { | |
115 | register int i; | |
116 | ||
117 | for(i=1; i<NSIG; i++) { | |
118 | if (mask & 1) | |
119 | return (i); | |
120 | mask >>= 1; | |
121 | } | |
122 | return (0); | |
123 | } | |
4147b3f6 | 124 | |
febd1daa BJ |
125 | bcmp(s1, s2, len) |
126 | register char *s1, *s2; | |
127 | register int len; | |
128 | { | |
129 | ||
130 | while (--len) | |
131 | if (*s1++ != *s2++) | |
132 | return (1); | |
133 | return (0); | |
134 | } | |
135 | ||
136 | strlen(s1) | |
137 | register char *s1; | |
138 | { | |
139 | register int len; | |
140 | ||
141 | for (len = 0; *s1++ != '\0'; len++) | |
142 | /* void */; | |
143 | return (len); | |
144 | } | |
145 | #endif | |
d6d7360b | 146 | |
d6d7360b BJ |
147 | /* |
148 | * Pass back c to the user. | |
149 | */ | |
150 | passuc(c, uio) | |
151 | register c; | |
152 | struct uio *uio; | |
153 | { | |
154 | register struct iovec *iov = uio->uio_iov; | |
d6d7360b BJ |
155 | |
156 | switch (uio->uio_segflg) { | |
157 | ||
158 | case 0: | |
159 | if (subyte(iov->iov_base, c) < 0) | |
160 | goto fault; | |
161 | break; | |
162 | ||
163 | case 1: | |
164 | *iov->iov_base = c; | |
165 | break; | |
166 | ||
167 | case 2: | |
168 | if (suibyte(iov->iov_base, c) < 0) | |
169 | goto fault; | |
170 | break; | |
171 | } | |
172 | iov->iov_base++; | |
173 | iov->iov_len--; | |
174 | uio->uio_resid--; | |
175 | uio->uio_offset++; | |
176 | if (iov->iov_len <= 0) { | |
177 | uio->uio_iov++; | |
178 | uio->uio_iovcnt--; | |
179 | } | |
180 | return (0); | |
181 | fault: | |
182 | return (EFAULT); | |
183 | } |