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1.1 nbrk 1: /* $OpenBSD: ofdev.c,v 1.14 2007/06/14 03:27:16 drahn Exp $ */
2: /* $NetBSD: ofdev.c,v 1.1 1997/04/16 20:29:20 thorpej Exp $ */
3:
4: /*
5: * Copyright (C) 1995, 1996 Wolfgang Solfrank.
6: * Copyright (C) 1995, 1996 TooLs GmbH.
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. All advertising materials mentioning features or use of this software
18: * must display the following acknowledgement:
19: * This product includes software developed by TooLs GmbH.
20: * 4. The name of TooLs GmbH may not be used to endorse or promote products
21: * derived from this software without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26: * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33: */
34: /*
35: * Device I/O routines using Open Firmware
36: */
37: #include <sys/param.h>
38: #include <sys/disklabel.h>
39: #include <netinet/in.h>
40:
41: #include <lib/libsa/stand.h>
42: #include <lib/libsa/ufs.h>
43: #include <lib/libsa/cd9660.h>
44: #include <lib/libsa/nfs.h>
45: #include <hfs.h>
46:
47: #include <macppc/stand/ofdev.h>
48:
49: extern char bootdev[];
50:
51: /*
52: * this function is passed [device specifier]:[kernel]
53: * however a device specifier may contain a ':'
54: */
55: char namebuf[256];
56: static char *
57: filename(char *str)
58: {
59: char *cp, *lp;
60: char savec;
61: int dhandle;
62:
63: cp = strrchr(str, ':');
64: if (cp == NULL)
65: return NULL;
66:
67: savec = *cp;
68: *cp = 0;
69: strlcpy(namebuf, cp+1, sizeof namebuf);
70: return namebuf;
71: }
72:
73: static int
74: strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf,
75: size_t *rsize)
76: {
77: struct of_dev *dev = devdata;
78: u_quad_t pos;
79: int n;
80:
81: if (rw != F_READ)
82: return EPERM;
83: if (dev->type != OFDEV_DISK)
84: panic("strategy");
85:
86: pos = (u_quad_t)(blk + dev->partoff) * dev->bsize;
87:
88: for (;;) {
89: if (OF_seek(dev->handle, pos) < 0)
90: break;
91: n = OF_read(dev->handle, buf, size);
92: if (n == -2)
93: continue;
94: if (n < 0)
95: break;
96: *rsize = n;
97: return 0;
98: }
99: return EIO;
100: }
101:
102: static int
103: devclose(struct open_file *of)
104: {
105: struct of_dev *op = of->f_devdata;
106:
107: if (op->type == OFDEV_NET)
108: net_close(op);
109: if (op->dmabuf)
110: OF_call_method("dma-free", op->handle, 2, 0,
111: op->dmabuf, MAXPHYS);
112:
113: OF_close(op->handle);
114: op->handle = -1;
115: }
116:
117: static struct devsw devsw[1] = {
118: "OpenFirmware",
119: strategy,
120: (int (*)(struct open_file *, ...))nodev,
121: devclose,
122: noioctl
123: };
124: int ndevs = sizeof devsw / sizeof devsw[0];
125:
126: static struct fs_ops file_system_ufs = {
127: ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat
128: };
129: static struct fs_ops file_system_cd9660 = {
130: cd9660_open, cd9660_close, cd9660_read, cd9660_write, cd9660_seek,
131: cd9660_stat
132: };
133: static struct fs_ops file_system_hfs = {
134: hfs_open, hfs_close, hfs_read, hfs_write, hfs_seek, hfs_stat
135: };
136: static struct fs_ops file_system_nfs = {
137: nfs_open, nfs_close, nfs_read, nfs_write, nfs_seek, nfs_stat
138: };
139:
140: struct fs_ops file_system[3];
141: int nfsys;
142:
143: static struct of_dev ofdev = {
144: -1,
145: };
146:
147: char opened_name[256];
148:
149: static u_long
150: get_long(p)
151: const void *p;
152: {
153: const unsigned char *cp = p;
154:
155: return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24);
156: }
157:
158: int
159: read_mac_label(struct of_dev *devp, char *buf, struct disklabel *lp)
160: {
161: struct part_map_entry *part;
162: struct buf *bp;
163: int err;
164: size_t read;
165: int part_cnt;
166: int i;
167: char *s;
168:
169: if ((strategy(devp, F_READ, 1, DEV_BSIZE, buf, &read) != 0) ||
170: (read != DEV_BSIZE))
171: return ERDLAB;
172:
173: part = (struct part_map_entry *)buf;
174:
175: /* if first partition is not valid, assume not HFS/DPME partitioned */
176: if (part->pmSig != PART_ENTRY_MAGIC)
177: return ERDLAB;
178:
179: part_cnt = part->pmMapBlkCnt;
180:
181: /* first search for "OpenBSD" partition type
182: * standard bsd disklabel lives inside at offset 0
183: * otherwise, we should fake a bsd partition
184: * with first HFS partition starting at 'i'
185: * ? will this cause problems with booting bsd.rd from hfs
186: */
187: for (i = 0; i < part_cnt; i++) {
188: /* read the appropriate block */
189: if ((strategy(devp, F_READ, 1+i, DEV_BSIZE, buf, &read) != 0)
190: || (read != DEV_BSIZE))
191: return ERDLAB;
192:
193: part = (struct part_map_entry *)buf;
194: /* toupper the string, in case caps are different... */
195: for (s = part->pmPartType; *s; s++)
196: if ((*s >= 'a') && (*s <= 'z'))
197: *s = (*s - 'a' + 'A');
198:
199: if (0 == strcmp(part->pmPartType, PART_TYPE_OPENBSD)) {
200: /* FOUND OUR PARTITION!!! */
201: if(strategy(devp, F_READ, part->pmPyPartStart,
202: DEV_BSIZE, buf, &read) == 0
203: && read == DEV_BSIZE)
204: {
205: if (!getdisklabel(buf, lp))
206: return 0;
207:
208: /* If we have an OpenBSD region
209: * but no valid parition table,
210: * we cannot load a kernel from
211: * it, punt.
212: * should not have more than one
213: * OpenBSD of DPME type.
214: */
215: return ERDLAB;
216: }
217: }
218: }
219: return ERDLAB;
220: }
221:
222: /*
223: * Find a valid disklabel.
224: */
225: static int
226: search_label(devp, off, buf, lp, off0)
227: struct of_dev *devp;
228: u_long off;
229: char *buf;
230: struct disklabel *lp;
231: u_long off0;
232: {
233: size_t read;
234: struct dos_partition *p;
235: int i;
236: u_long poff;
237: static int recursion;
238:
239: if (strategy(devp, F_READ, off, DEV_BSIZE, buf, &read) ||
240: read != DEV_BSIZE)
241: return ERDLAB;
242:
243: if (buf[510] != 0x55 || buf[511] != 0xaa)
244: return ERDLAB;
245:
246: if (recursion++ <= 1)
247: off0 += off;
248: for (p = (struct dos_partition *)(buf + DOSPARTOFF), i = 4;
249: --i >= 0; p++) {
250: if (p->dp_typ == DOSPTYP_OPENBSD) {
251: poff = get_long(&p->dp_start) + off0;
252: if (strategy(devp, F_READ, poff + LABELSECTOR,
253: DEV_BSIZE, buf, &read) == 0
254: && read == DEV_BSIZE) {
255: if (!getdisklabel(buf, lp)) {
256: recursion--;
257: return 0;
258: }
259: }
260: if (strategy(devp, F_READ, off, DEV_BSIZE, buf, &read)
261: || read != DEV_BSIZE) {
262: recursion--;
263: return ERDLAB;
264: }
265: } else if (p->dp_typ == DOSPTYP_EXTEND) {
266: poff = get_long(&p->dp_start);
267: if (!search_label(devp, poff, buf, lp, off0)) {
268: recursion--;
269: return 0;
270: }
271: if (strategy(devp, F_READ, off, DEV_BSIZE, buf, &read)
272: || read != DEV_BSIZE) {
273: recursion--;
274: return ERDLAB;
275: }
276: }
277: }
278: recursion--;
279: return ERDLAB;
280: }
281:
282: int
283: devopen(struct open_file *of, const char *name, char **file)
284: {
285: char *cp;
286: char fname[256];
287: char devname[256];
288: char buf[DEV_BSIZE];
289: struct disklabel label;
290: int handle, part;
291: size_t read;
292: int error = 0;
293:
294: if (ofdev.handle != -1)
295: panic("devopen");
296: if (of->f_flags != F_READ)
297: return EPERM;
298:
299: strlcpy(fname, name, sizeof fname);
300: cp = filename(fname);
301: if (cp == NULL)
302: return ENOENT;
303: strlcpy(buf, cp, sizeof buf);
304: strlcpy(opened_name, fname, sizeof opened_name);
305:
306: strlcat(opened_name, ":", sizeof opened_name);
307: if (*buf != '/')
308: strlcat(opened_name, "/", sizeof opened_name);
309:
310: strlcat(opened_name, buf, sizeof opened_name);
311: *file = opened_name + strlen(fname) + 1;
312:
313: if ((handle = OF_finddevice(fname)) == -1)
314: return ENOENT;
315: if (OF_getprop(handle, "name", buf, sizeof buf) < 0)
316: return ENXIO;
317: if (OF_getprop(handle, "device_type", buf, sizeof buf) < 0)
318: return ENXIO;
319: if (!strcmp(buf, "block"))
320: /*
321: * For block devices, indicate raw partition
322: * (:0 in OpenFirmware)
323: */
324: strlcat(fname, ":0", sizeof fname);
325: if ((handle = OF_open(fname)) == -1)
326: return ENXIO;
327: bzero(&ofdev, sizeof ofdev);
328: ofdev.handle = handle;
329: ofdev.dmabuf = NULL;
330: OF_call_method("dma-alloc", handle, 1, 1, MAXPHYS, &ofdev.dmabuf);
331: if (!strcmp(buf, "block")) {
332: ofdev.type = OFDEV_DISK;
333: ofdev.bsize = DEV_BSIZE;
334: /* First try to find a disklabel without MBR partitions */
335: if (strategy(&ofdev, F_READ,
336: LABELSECTOR, DEV_BSIZE, buf, &read) != 0 ||
337: read != DEV_BSIZE ||
338: getdisklabel(buf, &label)) {
339: /* Else try MBR partitions */
340: error = read_mac_label(&ofdev, buf, &label);
341: if (error == ERDLAB)
342: error = search_label(&ofdev, 0, buf, &label, 0);
343:
344: if (error && error != ERDLAB)
345: goto bad;
346: }
347:
348: if (error == ERDLAB) {
349: /* No label, just use complete disk */
350: ofdev.partoff = 0;
351: } else {
352: part = 0; /* how to pass this parameter */
353: ofdev.partoff = label.d_partitions[part].p_offset;
354: }
355:
356: of->f_dev = devsw;
357: of->f_devdata = &ofdev;
358: bcopy(&file_system_ufs, file_system, sizeof file_system[0]);
359: bcopy(&file_system_cd9660, file_system + 1,
360: sizeof file_system[0]);
361: bcopy(&file_system_hfs, file_system + 2,
362: sizeof file_system[0]);
363: nfsys = 3;
364: return 0;
365: }
366: if (!strcmp(buf, "network")) {
367: ofdev.type = OFDEV_NET;
368: of->f_dev = devsw;
369: of->f_devdata = &ofdev;
370: bcopy(&file_system_nfs, file_system, sizeof file_system[0]);
371: nfsys = 1;
372: if (error = net_open(&ofdev))
373: goto bad;
374: return 0;
375: }
376: error = EFTYPE;
377: bad:
378: OF_close(handle);
379: ofdev.handle = -1;
380: return error;
381: }