Annotation of sys/arch/macppc/stand/main.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: main.c,v 1.3 2007/06/24 14:58:12 tom Exp $ */
2: /* $NetBSD: boot.c,v 1.1 1997/04/16 20:29:17 thorpej Exp $ */
3:
4: /*
5: * Copyright (c) 1997 Jason R. Thorpe. All rights reserved.
6: * Copyright (C) 1995, 1996 Wolfgang Solfrank.
7: * Copyright (C) 1995, 1996 TooLs GmbH.
8: * All rights reserved.
9: *
10: * ELF support derived from NetBSD/alpha's boot loader, written
11: * by Christopher G. Demetriou.
12: *
13: * Redistribution and use in source and binary forms, with or without
14: * modification, are permitted provided that the following conditions
15: * are met:
16: * 1. Redistributions of source code must retain the above copyright
17: * notice, this list of conditions and the following disclaimer.
18: * 2. Redistributions in binary form must reproduce the above copyright
19: * notice, this list of conditions and the following disclaimer in the
20: * documentation and/or other materials provided with the distribution.
21: * 3. All advertising materials mentioning features or use of this software
22: * must display the following acknowledgement:
23: * This product includes software developed by TooLs GmbH.
24: * 4. The name of TooLs GmbH may not be used to endorse or promote products
25: * derived from this software without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
28: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
29: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
30: * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
33: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
34: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
35: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
36: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37: */
38:
39: /*
40: * First try for the boot code
41: *
42: * Input syntax is:
43: * [promdev[{:|,}partition]]/[filename] [flags]
44: */
45:
46: #define ELFSIZE 32 /* We use 32-bit ELF. */
47:
48: #include <sys/param.h>
49: #include <sys/exec.h>
50: #include <sys/exec_elf.h>
51: #include <sys/reboot.h>
52: #include <sys/disklabel.h>
53:
54: #include <lib/libkern/libkern.h>
55: #include <lib/libsa/stand.h>
56: #include <lib/libsa/loadfile.h>
57: #include <stand/boot/cmd.h>
58:
59:
60: #include <machine/cpu.h>
61:
62: #include <macppc/stand/ofdev.h>
63: #include <macppc/stand/openfirm.h>
64:
65: char bootdev[128];
66: int boothowto;
67: int debug;
68:
69:
70: void
71: get_alt_bootdev(char *, size_t, char *, size_t);
72:
73: static void
74: prom2boot(char *dev)
75: {
76: char *cp, *lp = 0;
77:
78: for (cp = dev; *cp; cp++)
79: if (*cp == ':')
80: lp = cp;
81: if (!lp)
82: lp = cp;
83: *lp = 0;
84: }
85:
86: static void
87: parseargs(char *str, int *howtop)
88: {
89: char *cp;
90:
91: /* Allow user to drop back to the PROM. */
92: if (strcmp(str, "exit") == 0)
93: _rtt();
94:
95: *howtop = 0;
96: if (str[0] == '\0')
97: return;
98:
99: cp = str;
100: while (*cp != 0) {
101: /* check for - */
102: if (*cp == '-')
103: break; /* start of options found */
104:
105: while (*cp != 0 && *cp != ' ')
106: cp++; /* character in the middle of the name, skip */
107:
108: while (*cp == ' ')
109: *cp++ = 0;
110: }
111: if (!*cp)
112: return;
113:
114: *cp++ = 0;
115: while (*cp) {
116: switch (*cp++) {
117: case 'a':
118: *howtop |= RB_ASKNAME;
119: break;
120: case 'c':
121: *howtop |= RB_CONFIG;
122: break;
123: case 's':
124: *howtop |= RB_SINGLE;
125: break;
126: case 'd':
127: *howtop |= RB_KDB;
128: debug = 1;
129: break;
130: }
131: }
132: }
133:
134: static void
135: chain(void (*entry)(), char *args, void *ssym, void *esym)
136: {
137: extern char end[];
138: int l, machine_tag;
139:
140: freeall();
141:
142: /*
143: * Stash pointer to end of symbol table after the argument
144: * strings.
145: */
146: l = strlen(args) + 1;
147: bcopy(&ssym, args + l, sizeof(ssym));
148: l += sizeof(ssym);
149: bcopy(&esym, args + l, sizeof(esym));
150: l += sizeof(esym);
151:
152: #ifdef __notyet__
153: /*
154: * Tell the kernel we're an OpenFirmware system.
155: */
156: machine_tag = POWERPC_MACHINE_OPENFIRMWARE;
157: bcopy(&machine_tag, args + l, sizeof(machine_tag));
158: l += sizeof(machine_tag);
159: #endif
160:
161: OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l);
162: panic("chain");
163: }
164:
165: /*
166: * XXX This limits the maximum size of the (uncompressed) bsd.rd to a
167: * little under 11MB.
168: */
169: #define CLAIM_LIMIT 0x00c00000
170:
171: char bootline[512];
172:
173: extern char *kernelfile;
174: int
175: main()
176: {
177: int chosen;
178: u_long marks[MARK_MAX];
179: int fd;
180:
181:
182: /*
183: * Get the boot arguments from Openfirmware
184: */
185: if ((chosen = OF_finddevice("/chosen")) == -1 ||
186: OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 ||
187: OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) {
188: printf("Invalid Openfirmware environment\n");
189: exit();
190: }
191: prom2boot(bootdev);
192: get_alt_bootdev(bootdev, sizeof(bootdev), bootline, sizeof(bootline));
193: if (bootline[0] != '\0')
194: kernelfile = bootline;
195:
196: OF_claim((void *)0x00100000, CLAIM_LIMIT, 0); /* XXX */
197: boot(0);
198: return 0;
199: }
200:
201: void
202: get_alt_bootdev(char *dev, size_t devsz, char *line, size_t linesz)
203: {
204: char *p;
205: int len;
206: /*
207: * if the kernel image specified contains a ':' it is
208: * [device]:[kernel], so seperate the two fields.
209: */
210: p = strrchr(line, ':');
211: if (p == NULL)
212: return;
213: /* user specified boot device for kernel */
214: len = p - line + 1; /* str len plus nil */
215: strlcpy(dev, line, len > devsz ? devsz : len);
216:
217: strlcpy(line, p+1, linesz); /* rest of string ater ':' */
218: }
219:
220:
221: void
222: devboot(dev_t dev, char *p)
223: {
224: strlcpy(p, bootdev, BOOTDEVLEN);
225: }
226:
227: run_loadfile(u_long *marks, int howto)
228: {
229: char bootline[512]; /* Should check size? */
230: u_int32_t entry;
231: char *cp;
232: void *ssym, *esym;
233:
234: strlcpy(bootline, opened_name, sizeof bootline);
235: cp = bootline + strlen(bootline);
236: *cp++ = ' ';
237: *cp = '-';
238: if (howto & RB_ASKNAME)
239: *++cp = 'a';
240: if (howto & RB_CONFIG)
241: *++cp = 'c';
242: if (howto & RB_SINGLE)
243: *++cp = 's';
244: if (howto & RB_KDB)
245: *++cp = 'd';
246: if (*cp == '-')
247: *--cp = 0;
248: else
249: *++cp = 0;
250:
251: entry = marks[MARK_ENTRY];
252: ssym = (void *)marks[MARK_SYM];
253: esym = (void *)marks[MARK_END];
254: {
255: u_int32_t lastpage;
256: lastpage = roundup(marks[MARK_END], NBPG);
257: OF_release((void*)lastpage, CLAIM_LIMIT - lastpage);
258: }
259:
260: chain((void *)entry, bootline, ssym, esym);
261:
262: _rtt();
263: return 0;
264:
265: }
266:
267: int
268: cnspeed(dev_t dev, int sp)
269: {
270: return CONSPEED;
271: }
272:
273: char ttyname_buf[8];
274:
275: char *
276: ttyname(int fd)
277: {
278: snprintf(ttyname_buf, sizeof ttyname_buf, "ofc0");
279:
280: }
281:
282: dev_t
283: ttydev(char *name)
284: {
285: return makedev(0,0);
286: }
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