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1.1 root 1: /*
2: * File: main.c
3: *
4: * Purpose: part of COHERENT kernel
5: *
6: * The information contained herein is a trade secret of Mark Williams
7: * Company, and is confidential information. It is provided under a
8: * license agreement, and may be copied or disclosed only under the
9: * terms of that agreement. Any reproduction or disclosure of this
10: * material without the express written authorization of Mark Williams
11: * Company or persuant to the license agreement is unlawful.
12: *
13: * $Log: main.c,v $
14: * Revision 1.4 92/01/22 09:48:40 bin
15: * update by hal... post 321 beta
16: *
17: * Revision 1.4 92/01/21 16:08:34 hal
18: * Merged with 386 main.c. Call read_cmos().
19: *
20: * Revision 1.3 92/01/15 10:16:02 hal
21: * Trivial banner change.
22: *
23: * Revision 1.2 88/06/29 12:00:29 src
24: * Real/Protected mode status now printed during boot sequence.
25: * Three part serial numbers now supported, moved to optional fourth line.
26: *
27: * Revision 1.1 88/03/24 16:13:58 src
28: * Initial revision
29: *
30: * 87/04/09 Allan Cornish /usr/src/sys/coh/main.c
31: * Serial numbers changed to support group.
32: *
33: * 87/01/05 Allan Cornish /usr/src/sys/coh/main.c
34: * Copyright notice revised to include 1987.
35: */
36:
37: /*
38: * Includes.
39: */
40: #include <sys/coherent.h>
41: #include <sys/devices.h>
42: #include <sys/fdisk.h>
43: #include <sys/proc.h>
44: #include <sys/seg.h>
45: #include <sys/stat.h>
46: #include <sys/typed.h>
47: #include <sys/uproc.h>
48:
49: /*
50: * Definitions.
51: * Constants.
52: * Macros with argument lists.
53: * Typedefs.
54: * Enums.
55: */
56: #ifndef VERSION /* This should be specified at compile time */
57: #define VERSION "..."
58: #endif
59: typedef unsigned char uchar;
60: typedef unsigned int uint;
61: typedef unsigned long ulong;
62:
63: /*
64: * Functions.
65: * Import Functions.
66: * Export Functions.
67: * Local Functions.
68: */
69: int read_cmos();
70:
71: static void atcount();
72: static void rpdev();
73:
74: /*
75: * Global Data.
76: * Import Variables.
77: * Export Variables.
78: * Local Variables.
79: */
80: extern dev_t rootdev;
81: extern dev_t pipedev;
82: extern int ronflag;
83:
84: short n_atdr;
85: char version[] = VERSION;
86: #ifdef _I386
87: char copyright[] = "\
88: Copyright 1982,1992 Mark Williams Company\n\
89: Copyright 1991 Inst. O'Donnell, Bievres, France\n";
90: #else
91: char copyright[] = "\
92: Copyright 1982,1992 Mark Williams Company\n";
93: #endif
94:
95: #ifdef _I386
96: unsigned serialnum0 = 0;
97: unsigned serialnum1 = 0;
98: static long sntime = 870409113L;
99: static long snm = 0;
100: static long snmcopy = 0;
101: #else
102: unsigned long _entry = 0; /* really the serial number */
103: unsigned long __ = 0; /* really the serial number also */
104: #endif
105:
106: main()
107: {
108: register SEG *sp;
109: #ifndef _I386
110: extern int realmode;
111: #endif
112:
113: u.u_error = 0;
114: bufinit();
115: cltinit();
116: pcsinit();
117: seginit();
118: atcount();
119: rpdev();
120: devinit();
121: #ifdef _I386
122: printf("\nCOHERENT Version %s - 386 Mode (mem=%u Kbytes)\n",
123: version, ctob(allocno())/1024);
124: #else
125: printf("\Mark Williams COHERENT Version %s - %s Mode (mem=%u Kbytes)\n",
126: version, (realmode ? "Real" : "Protected"), msize );
127: #endif
128: printf(copyright);
129:
130: #ifdef _I386
131: if ( snm ) {
132: printf("Serial Number %u", (unsigned) snm );
133: if ( serialnum0 ) {
134: printf(":%u", (unsigned) serialnum0 );
135: if ( serialnum1 )
136: printf(":%u", (unsigned) serialnum1 );
137: }
138: printf("\n");
139: }
140:
141: /*
142: * Verify correct serial number
143: */
144: if (snm != snmcopy)
145: panic("Verification error - call Mark Williams Company at 1-800-MWC-1700\n");
146: #else
147: if ( _entry ) {
148: printf("Serial Number ");
149: printf("%U\n", _entry);
150: }
151:
152: /*
153: * Verify correct serial number
154: */
155: if (_entry != __)
156: panic("Verification error - call Mark Williams Company at 1-800-MARK-WMS\n");
157: #endif
158:
159: /*
160: * Turn on clock, mount root device, start off processes
161: * and return.
162: */
163: batflag = 1;
164: #ifdef _I386
165: iprocp = SELF;
166: if (pfork()) {
167: idle();
168: } else {
169: fsminit();
170: eprocp = SELF;
171: eveinit();
172: }
173: #else
174: if ((sp=salloc((fsize_t)UPASIZE, SFNCLR|SFNSWP)) == NULL)
175: panic("Cannot allocate user area");
176: if ((iprocp=process(idle))==NULL || (eprocp=process(NULL))==NULL)
177: panic("Cannot create process");
178: eveinit(sp);
179: fsminit();
180: #endif
181: }
182:
183: /*
184: * atcount()
185: *
186: * Read CMOS and return 0,1, or 2 as number of installed "at" drives.
187: */
188: static void atcount()
189: {
190: int u;
191: n_atdr = 0;
192:
193: /*
194: * Count nonzero drive types.
195: *
196: * High nibble of CMOS 0x12 is drive 0's type.
197: * Low nibble of CMOS 0x12 is drive 1's type.
198: */
199: u = read_cmos(0x12);
200: if (u & 0x00F0)
201: n_atdr++;
202: if (u & 0x000F)
203: n_atdr++;
204: }
205:
206: /*
207: * rpdev()
208: *
209: * If rootdev is zero, try to use data from tboot to set it.
210: * If pipedev is zero, make it 0x883 if ronflag == 1, else make it rootdev.
211: * Call rpdev() AFTER calling atcount().
212: */
213: static void rpdev()
214: {
215: FIFO *ffp;
216: typed_space *tp;
217: int found;
218: extern typed_space boot_gift;
219: unsigned root_ptn, root_drv, root_maj, root_min;
220:
221: if (rootdev == makedev(0,0)) {
222: found = 0;
223: if (F_NULL != (ffp = fifo_open(&boot_gift, 0))) {
224:
225: for (; !found && T_NULL != (tp = fifo_read(ffp)); ) {
226: BIOS_ROOTDEV *brp = (BIOS_ROOTDEV *)tp->ts_data;
227: if (T_BIOS_ROOTDEV == tp->ts_type) {
228: found = 1;
229: root_ptn = brp->rd_partition;
230: }
231: }
232: fifo_close(ffp);
233:
234: }
235: if (found) {
236: /*
237: * root_drv = BIOS # of root drive
238: * root_ptn = partition # in range 0..3
239: * if root on second "at" device, add 4 to minor #
240: * if root on second scsi device, add 16 to minor #
241: */
242: root_drv = root_ptn/NPARTN;
243: root_ptn %= NPARTN;
244: if (n_atdr > root_drv) {
245: root_maj = AT_MAJOR;
246: root_min = root_drv*NPARTN + root_ptn;
247: } else { /* root on SCSI device */
248: root_maj = SCSI_MAJOR;
249: root_min = (root_drv-n_atdr)*16 + root_ptn;
250: }
251: rootdev = makedev(root_maj, root_min);
252: printf("rootdev=(%d,%d)\n", root_maj, root_min);
253: }
254: }
255: if (pipedev == makedev(0,0)) {
256: if (ronflag)
257: pipedev = makedev(RM_MAJOR, 0x83);
258: else
259: pipedev = rootdev;
260: printf("pipedev=(%d,%d)\n", (pipedev>>8)&0xff, pipedev&0xff);
261: }
262: }
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