1 | /* |
2 | * Copyright (c) 2004-2006 Apple Computer, Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* |
29 | * Copyright (c) 1988 University of Utah. |
30 | * Copyright (c) 1990, 1993 |
31 | * The Regents of the University of California. All rights reserved. |
32 | * |
33 | * This code is derived from software contributed to Berkeley by |
34 | * the Systems Programming Group of the University of Utah Computer |
35 | * Science Department. |
36 | * |
37 | * Redistribution and use in source and binary forms, with or without |
38 | * modification, are permitted provided that the following conditions |
39 | * are met: |
40 | * 1. Redistributions of source code must retain the above copyright |
41 | * notice, this list of conditions and the following disclaimer. |
42 | * 2. Redistributions in binary form must reproduce the above copyright |
43 | * notice, this list of conditions and the following disclaimer in the |
44 | * documentation and/or other materials provided with the distribution. |
45 | * 3. All advertising materials mentioning features or use of this software |
46 | * must display the following acknowledgement: |
47 | * This product includes software developed by the University of |
48 | * California, Berkeley and its contributors. |
49 | * 4. Neither the name of the University nor the names of its contributors |
50 | * may be used to endorse or promote products derived from this software |
51 | * without specific prior written permission. |
52 | * |
53 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
54 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
55 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
56 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
57 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
58 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
59 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
60 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
61 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
62 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
63 | * SUCH DAMAGE. |
64 | * |
65 | * from: Utah Hdr: vn.c 1.13 94/04/02 |
66 | * |
67 | * from: @(#)vn.c 8.6 (Berkeley) 4/1/94 |
68 | * $FreeBSD: src/sys/dev/vn/vn.c,v 1.105.2.4 2001/11/18 07:11:00 dillon Exp $ |
69 | */ |
70 | |
71 | /* |
72 | * RAM disk driver. |
73 | * |
74 | * Block interface to a ramdisk. |
75 | * |
76 | */ |
77 | |
78 | #include <sys/param.h> |
79 | #include <sys/kernel.h> |
80 | #include <sys/mount.h> |
81 | #include <sys/namei.h> |
82 | #include <sys/proc.h> |
83 | #include <sys/buf.h> |
84 | #include <sys/malloc.h> |
85 | #include <sys/mount.h> |
86 | #include <sys/fcntl.h> |
87 | #include <sys/conf.h> |
88 | #include <sys/disk.h> |
89 | #include <sys/stat.h> |
90 | #include <sys/vm.h> |
91 | #include <sys/uio_internal.h> |
92 | #include <libkern/libkern.h> |
93 | |
94 | #include <vm/pmap.h> |
95 | #include <vm/vm_pager.h> |
96 | #include <mach/memory_object_types.h> |
97 | #include <kern/debug.h> |
98 | |
99 | #include <miscfs/devfs/devfs.h> |
100 | |
101 | |
102 | void mdevinit(int the_cnt); |
103 | |
104 | static open_close_fcn_t mdevopen; |
105 | static open_close_fcn_t mdevclose; |
106 | static psize_fcn_t mdevsize; |
107 | static strategy_fcn_t mdevstrategy; |
108 | static int mdevbioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p); |
109 | static int mdevcioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p); |
110 | static int mdevrw(dev_t dev, struct uio *uio, int ioflag); |
111 | |
112 | #ifdef CONFIG_MEMDEV_INSECURE |
113 | static char * nonspace(char *pos, char *end); |
114 | static char * getspace(char *pos, char *end); |
115 | static char * cvtnum(char *pos, char *end, uint64_t *num); |
116 | #endif /* CONFIG_MEMDEV_INSECURE */ |
117 | |
118 | extern void bcopy_phys(addr64_t from, addr64_t to, vm_size_t bytes); |
119 | extern void mapping_set_mod(ppnum_t pn); |
120 | extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va); |
121 | |
122 | /* |
123 | * Maximal number of memory devices. |
124 | */ |
125 | #define NB_MAX_MDEVICES (16) |
126 | |
127 | /* |
128 | * cdevsw |
129 | * D_DISK we want to look like a disk |
130 | * D_CANFREE We support B_FREEBUF |
131 | */ |
132 | |
133 | static struct bdevsw mdevbdevsw = { |
134 | /* open */ mdevopen, |
135 | /* close */ mdevclose, |
136 | /* strategy */ mdevstrategy, |
137 | /* ioctl */ mdevbioctl, |
138 | /* dump */ eno_dump, |
139 | /* psize */ mdevsize, |
140 | /* flags */ D_DISK, |
141 | }; |
142 | |
143 | static struct cdevsw mdevcdevsw = { |
144 | /* open */ mdevopen, |
145 | /* close */ mdevclose, |
146 | /* read */ mdevrw, |
147 | /* write */ mdevrw, |
148 | /* ioctl */ mdevcioctl, |
149 | /* stop */ eno_stop, |
150 | /* reset */ eno_reset, |
151 | /* ttys */ NULL, |
152 | /* select */ eno_select, |
153 | /* mmap */ eno_mmap, |
154 | /* strategy */ eno_strat, |
155 | /* getc */ eno_getc, |
156 | /* putc */ eno_putc, |
157 | /* flags */ D_DISK, |
158 | }; |
159 | |
160 | struct mdev { |
161 | uint64_t mdBase; /* file size in bytes */ |
162 | uint32_t mdSize; /* file size in bytes */ |
163 | int mdFlags; /* flags */ |
164 | int mdSecsize; /* sector size */ |
165 | int mdBDev; /* Block device number */ |
166 | int mdCDev; /* Character device number */ |
167 | void * mdbdevb; |
168 | void * mdcdevb; |
169 | } mdev[NB_MAX_MDEVICES]; |
170 | |
171 | /* mdFlags */ |
172 | #define mdInited 0x01 /* This device defined */ |
173 | #define mdRO 0x02 /* This device is read-only */ |
174 | #define mdPhys 0x04 /* This device is in physical memory */ |
175 | |
176 | int mdevBMajor = -1; |
177 | int mdevCMajor = -1; |
178 | |
179 | static int mdevioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p, int is_char); |
180 | dev_t mdevadd(int devid, uint64_t base, unsigned int size, int phys); |
181 | dev_t mdevlookup(int devid); |
182 | void mdevremoveall(void); |
183 | int mdevgetrange(int devid, uint64_t *base, uint64_t *size); |
184 | |
185 | static int mdevclose(__unused dev_t dev, __unused int flags, |
186 | __unused int devtype, __unused struct proc *p) { |
187 | |
188 | return (0); |
189 | } |
190 | |
191 | static int mdevopen(dev_t dev, int flags, __unused int devtype, __unused struct proc *p) { |
192 | |
193 | int devid; |
194 | |
195 | devid = minor(dev); /* Get minor device number */ |
196 | |
197 | if (devid >= NB_MAX_MDEVICES) return (ENXIO); /* Not valid */ |
198 | |
199 | if ((flags & FWRITE) && (mdev[devid].mdFlags & mdRO)) return (EACCES); /* Currently mounted RO */ |
200 | |
201 | return(0); |
202 | } |
203 | |
204 | static int mdevrw(dev_t dev, struct uio *uio, __unused int ioflag) { |
205 | int status; |
206 | addr64_t mdata; |
207 | int devid; |
208 | enum uio_seg saveflag; |
209 | |
210 | devid = minor(dev); /* Get minor device number */ |
211 | |
212 | if (devid >= NB_MAX_MDEVICES) return (ENXIO); /* Not valid */ |
213 | if (!(mdev[devid].mdFlags & mdInited)) return (ENXIO); /* Have we actually been defined yet? */ |
214 | |
215 | mdata = ((addr64_t)mdev[devid].mdBase << 12) + uio->uio_offset; /* Point to the area in "file" */ |
216 | |
217 | saveflag = uio->uio_segflg; /* Remember what the request is */ |
218 | #if LP64_DEBUG |
219 | if (UIO_IS_USER_SPACE(uio) == 0 && UIO_IS_SYS_SPACE(uio) == 0) { |
220 | panic("mdevrw - invalid uio_segflg\n" ); |
221 | } |
222 | #endif /* LP64_DEBUG */ |
223 | /* Make sure we are moving from physical ram if physical device */ |
224 | if (mdev[devid].mdFlags & mdPhys) { |
225 | if (uio->uio_segflg == UIO_USERSPACE64) |
226 | uio->uio_segflg = UIO_PHYS_USERSPACE64; |
227 | else if (uio->uio_segflg == UIO_USERSPACE32) |
228 | uio->uio_segflg = UIO_PHYS_USERSPACE32; |
229 | else |
230 | uio->uio_segflg = UIO_PHYS_USERSPACE; |
231 | } |
232 | status = uiomove64(mdata, uio_resid(uio), uio); /* Move the data */ |
233 | uio->uio_segflg = saveflag; /* Restore the flag */ |
234 | |
235 | return (status); |
236 | } |
237 | |
238 | static void mdevstrategy(struct buf *bp) { |
239 | unsigned int left, lop, csize; |
240 | vm_offset_t vaddr, blkoff; |
241 | int devid; |
242 | addr64_t paddr, fvaddr; |
243 | ppnum_t pp; |
244 | |
245 | devid = minor(buf_device(bp)); /* Get minor device number */ |
246 | |
247 | if ((mdev[devid].mdFlags & mdInited) == 0) { /* Have we actually been defined yet? */ |
248 | buf_seterror(bp, ENXIO); |
249 | buf_biodone(bp); |
250 | return; |
251 | } |
252 | |
253 | buf_setresid(bp, buf_count(bp)); /* Set byte count */ |
254 | |
255 | blkoff = buf_blkno(bp) * mdev[devid].mdSecsize; /* Get offset into file */ |
256 | |
257 | /* |
258 | * Note that reading past end is an error, but reading at end is an EOF. For these |
259 | * we just return with resid == count. |
260 | */ |
261 | |
262 | if (blkoff >= (mdev[devid].mdSize << 12)) { /* Are they trying to read/write at/after end? */ |
263 | if(blkoff != (mdev[devid].mdSize << 12)) { /* Are we trying to read after EOF? */ |
264 | buf_seterror(bp, EINVAL); /* Yeah, this is an error */ |
265 | } |
266 | buf_biodone(bp); /* Return */ |
267 | return; |
268 | } |
269 | |
270 | if ((blkoff + buf_count(bp)) > (mdev[devid].mdSize << 12)) { /* Will this read go past end? */ |
271 | buf_setcount(bp, ((mdev[devid].mdSize << 12) - blkoff)); /* Yes, trim to max */ |
272 | } |
273 | /* |
274 | * make sure the buffer's data area is |
275 | * accessible |
276 | */ |
277 | if (buf_map(bp, (caddr_t *)&vaddr)) |
278 | panic("ramstrategy: buf_map failed\n" ); |
279 | |
280 | fvaddr = (mdev[devid].mdBase << 12) + blkoff; /* Point to offset into ram disk */ |
281 | |
282 | if (buf_flags(bp) & B_READ) { /* Is this a read? */ |
283 | if(!(mdev[devid].mdFlags & mdPhys)) { /* Physical mapped disk? */ |
284 | bcopy((void *)((uintptr_t)fvaddr), |
285 | (void *)vaddr, (size_t)buf_count(bp)); /* This is virtual, just get the data */ |
286 | } |
287 | else { |
288 | left = buf_count(bp); /* Init the amount left to copy */ |
289 | while(left) { /* Go until it is all copied */ |
290 | |
291 | lop = min((4096 - (vaddr & 4095)), (4096 - (fvaddr & 4095))); /* Get smallest amount left on sink and source */ |
292 | csize = min(lop, left); /* Don't move more than we need to */ |
293 | |
294 | pp = pmap_find_phys(kernel_pmap, (addr64_t)((uintptr_t)vaddr)); /* Get the sink physical address */ |
295 | if(!pp) { /* Not found, what gives? */ |
296 | panic("mdevstrategy: sink address %016llX not mapped\n" , (addr64_t)((uintptr_t)vaddr)); |
297 | } |
298 | paddr = (addr64_t)(((addr64_t)pp << 12) | (addr64_t)(vaddr & 4095)); /* Get actual address */ |
299 | bcopy_phys(fvaddr, paddr, csize); /* Copy this on in */ |
300 | mapping_set_mod(paddr >> 12); /* Make sure we know that it is modified */ |
301 | |
302 | left = left - csize; /* Calculate what is left */ |
303 | vaddr = vaddr + csize; /* Move to next sink address */ |
304 | fvaddr = fvaddr + csize; /* Bump to next physical address */ |
305 | } |
306 | } |
307 | } |
308 | else { /* This is a write */ |
309 | if(!(mdev[devid].mdFlags & mdPhys)) { /* Physical mapped disk? */ |
310 | bcopy((void *)vaddr, (void *)((uintptr_t)fvaddr), |
311 | (size_t)buf_count(bp)); /* This is virtual, just put the data */ |
312 | } |
313 | else { |
314 | left = buf_count(bp); /* Init the amount left to copy */ |
315 | while(left) { /* Go until it is all copied */ |
316 | |
317 | lop = min((4096 - (vaddr & 4095)), (4096 - (fvaddr & 4095))); /* Get smallest amount left on sink and source */ |
318 | csize = min(lop, left); /* Don't move more than we need to */ |
319 | |
320 | pp = pmap_find_phys(kernel_pmap, (addr64_t)((uintptr_t)vaddr)); /* Get the source physical address */ |
321 | if(!pp) { /* Not found, what gives? */ |
322 | panic("mdevstrategy: source address %016llX not mapped\n" , (addr64_t)((uintptr_t)vaddr)); |
323 | } |
324 | paddr = (addr64_t)(((addr64_t)pp << 12) | (addr64_t)(vaddr & 4095)); /* Get actual address */ |
325 | |
326 | bcopy_phys(paddr, fvaddr, csize); /* Move this on out */ |
327 | |
328 | left = left - csize; /* Calculate what is left */ |
329 | vaddr = vaddr + csize; /* Move to next sink address */ |
330 | fvaddr = fvaddr + csize; /* Bump to next physical address */ |
331 | } |
332 | } |
333 | } |
334 | /* |
335 | * buf_unmap takes care of all the cases |
336 | * it will unmap the buffer from kernel |
337 | * virtual space if that was the state |
338 | * when we mapped it. |
339 | */ |
340 | buf_unmap(bp); |
341 | |
342 | buf_setresid(bp, 0); /* Nothing more to do */ |
343 | buf_biodone(bp); /* Say we've finished */ |
344 | } |
345 | |
346 | static int mdevbioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) { |
347 | return (mdevioctl(dev, cmd, data, flag, p, 0)); |
348 | } |
349 | |
350 | static int mdevcioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) { |
351 | return (mdevioctl(dev, cmd, data, flag, p, 1)); |
352 | } |
353 | |
354 | static int mdevioctl(dev_t dev, u_long cmd, caddr_t data, __unused int flag, |
355 | struct proc *p, int is_char) { |
356 | int error; |
357 | u_int32_t *f; |
358 | u_int64_t *o; |
359 | int devid; |
360 | dk_memdev_info_t * memdev_info; |
361 | |
362 | devid = minor(dev); /* Get minor device number */ |
363 | |
364 | if (devid >= NB_MAX_MDEVICES) return (ENXIO); /* Not valid */ |
365 | |
366 | error = proc_suser(p); /* Are we superman? */ |
367 | if (error) return (error); /* Nope... */ |
368 | |
369 | f = (u_int32_t*)data; |
370 | o = (u_int64_t *)data; |
371 | memdev_info = (dk_memdev_info_t *) data; |
372 | |
373 | switch (cmd) { |
374 | |
375 | case DKIOCGETMAXBLOCKCOUNTREAD: |
376 | *o = 32; |
377 | break; |
378 | |
379 | case DKIOCGETMAXBLOCKCOUNTWRITE: |
380 | *o = 32; |
381 | break; |
382 | |
383 | case DKIOCGETMAXSEGMENTCOUNTREAD: |
384 | *o = 32; |
385 | break; |
386 | |
387 | case DKIOCGETMAXSEGMENTCOUNTWRITE: |
388 | *o = 32; |
389 | break; |
390 | |
391 | case DKIOCGETBLOCKSIZE: |
392 | *f = mdev[devid].mdSecsize; |
393 | break; |
394 | |
395 | case DKIOCSETBLOCKSIZE: |
396 | if (is_char) return (ENODEV); /* We can only do this for a block */ |
397 | |
398 | if (*f < DEV_BSIZE) return (EINVAL); /* Too short? */ |
399 | |
400 | mdev[devid].mdSecsize = *f; /* set the new block size */ |
401 | break; |
402 | |
403 | case DKIOCISWRITABLE: |
404 | *f = 1; |
405 | break; |
406 | |
407 | case DKIOCGETBLOCKCOUNT: |
408 | if(!(mdev[devid].mdFlags & mdInited)) return (ENXIO); |
409 | *o = ((mdev[devid].mdSize << 12) + mdev[devid].mdSecsize - 1) / mdev[devid].mdSecsize; |
410 | break; |
411 | |
412 | /* |
413 | * We're interested in the following bits of information: |
414 | * Are you a memory-backed device (always yes, in this case)? |
415 | * Physical memory (mdPhys)? |
416 | * What is your base page? |
417 | * What is your size? |
418 | */ |
419 | case DKIOCGETMEMDEVINFO: |
420 | if (!(mdev[devid].mdFlags & mdInited)) return (ENXIO); |
421 | memdev_info->mi_mdev = TRUE; |
422 | memdev_info->mi_phys = (mdev[devid].mdFlags & mdPhys) ? TRUE : FALSE; |
423 | memdev_info->mi_base = mdev[devid].mdBase; |
424 | memdev_info->mi_size = mdev[devid].mdSize; |
425 | break; |
426 | |
427 | default: |
428 | error = ENOTTY; |
429 | break; |
430 | } |
431 | return(error); |
432 | } |
433 | |
434 | |
435 | static int mdevsize(dev_t dev) { |
436 | |
437 | int devid; |
438 | |
439 | devid = minor(dev); /* Get minor device number */ |
440 | if (devid >= NB_MAX_MDEVICES) return (ENXIO); /* Not valid */ |
441 | |
442 | if ((mdev[devid].mdFlags & mdInited) == 0) return(-1); /* Not inited yet */ |
443 | |
444 | return(mdev[devid].mdSecsize); |
445 | } |
446 | |
447 | #include <pexpert/pexpert.h> |
448 | |
449 | void mdevinit(__unused int the_cnt) { |
450 | |
451 | #ifdef CONFIG_MEMDEV_INSECURE |
452 | |
453 | int devid, phys; |
454 | uint64_t base; |
455 | uint64_t size; |
456 | char *ba, *lp; |
457 | dev_t dev; |
458 | |
459 | |
460 | ba = PE_boot_args(); /* Get the boot arguments */ |
461 | lp = ba + 256; /* Point to the end */ |
462 | |
463 | while(1) { /* Step through, looking for our keywords */ |
464 | phys = 0; /* Assume virtual memory device */ |
465 | ba = nonspace(ba, lp); /* Find non-space */ |
466 | if(ba >= lp) return; /* We are done if no more... */ |
467 | if(((ba[0] != 'v') && (ba[0] != 'p')) |
468 | || (ba[1] != 'm') || (ba[2] != 'd') || (ba[4] != '=') |
469 | || (ba[3] < '0') || (ba[3] > 'f') |
470 | || ((ba[3] > '9') && (ba[3] < 'a'))) { /* Is this of form "vmdx=" or "pmdx=" where x is hex digit? */ |
471 | |
472 | ba = getspace(ba, lp); /* Find next white space or end */ |
473 | continue; /* Start looking for the next one */ |
474 | } |
475 | |
476 | if(ba[0] == 'p') phys = 1; /* Set physical memory disk */ |
477 | |
478 | devid = ba[3] & 0xF; /* Assume digit */ |
479 | if(ba[3] > '9') devid += 9; /* Adjust for hex digits */ |
480 | |
481 | ba = &ba[5]; /* Step past keyword */ |
482 | ba = cvtnum(ba, lp, &base); /* Convert base of memory disk */ |
483 | if(ba >= lp) return; /* Malformed one at the end, leave */ |
484 | if(ba[0] != '.') continue; /* If not length separater, try next... */ |
485 | if(base & 0xFFF) continue; /* Only allow page aligned stuff */ |
486 | |
487 | ba++; /* Step past '.' */ |
488 | ba = cvtnum(ba, lp, &size); /* Try to convert it */ |
489 | if(!size || (size & 0xFFF)) continue; /* Allow only non-zer page size multiples */ |
490 | if(ba < lp) { /* If we are not at end, check end character */ |
491 | if((ba[0] != ' ') && (ba[0] != 0)) continue; /* End must be null or space */ |
492 | } |
493 | |
494 | dev = mdevadd(devid, base >> 12, (unsigned)size >> 12, phys); /* Go add the device */ |
495 | } |
496 | |
497 | #endif /* CONFIG_MEMDEV_INSECURE */ |
498 | |
499 | return; |
500 | |
501 | } |
502 | |
503 | #ifdef CONFIG_MEMDEV_INSECURE |
504 | |
505 | char *nonspace(char *pos, char *end) { /* Find next non-space in string */ |
506 | |
507 | if(pos >= end) return end; /* Don't go past end */ |
508 | if(pos[0] == 0) return end; /* If at null, make end */ |
509 | |
510 | while(1) { /* Keep going */ |
511 | if(pos[0] != ' ') return pos; /* Leave if we found one */ |
512 | pos++; /* Stop */ |
513 | if(pos >= end) return end; /* Quit if we run off end */ |
514 | } |
515 | } |
516 | |
517 | char *getspace(char *pos, char *end) { /* Find next non-space in string */ |
518 | |
519 | while(1) { /* Keep going */ |
520 | if(pos >= end) return end; /* Don't go past end */ |
521 | if(pos[0] == 0) return end; /* Leave if we hit null */ |
522 | if(pos[0] == ' ') return pos; /* Leave if we found one */ |
523 | pos++; /* Stop */ |
524 | } |
525 | } |
526 | |
527 | char *cvtnum(char *pos, char *end, uint64_t *num) { /* Convert to a number */ |
528 | |
529 | int rad, dig; |
530 | |
531 | *num = 0; /* Set answer to 0 to start */ |
532 | rad = 10; |
533 | |
534 | if(pos >= end) return end; /* Don't go past end */ |
535 | if(pos[0] == 0) return end; /* If at null, make end */ |
536 | |
537 | if(pos[0] == '0' && ((pos[1] == 'x') || (pos[1] == 'x'))) { /* A hex constant? */ |
538 | rad = 16; |
539 | pos += 2; /* Point to the number */ |
540 | } |
541 | |
542 | while(1) { /* Convert it */ |
543 | |
544 | if(pos >= end) return end; /* Don't go past end */ |
545 | if(pos[0] == 0) return end; /* If at null, make end */ |
546 | if(pos[0] < '0') return pos; /* Leave if non-digit */ |
547 | dig = pos[0] & 0xF; /* Extract digit */ |
548 | if(pos[0] > '9') { /* Is it bigger than 9? */ |
549 | if(rad == 10) return pos; /* Leave if not base 10 */ |
550 | if(!(((pos[0] >= 'A') && (pos[0] <= 'F')) |
551 | || ((pos[0] >= 'a') && (pos[0] <= 'f')))) return pos; /* Leave if bogus char */ |
552 | dig = dig + 9; /* Adjust for character */ |
553 | } |
554 | *num = (*num * rad) + dig; /* Accumulate the number */ |
555 | pos++; /* Step on */ |
556 | } |
557 | } |
558 | |
559 | #endif /* CONFIG_MEMDEV_INSECURE */ |
560 | |
561 | dev_t mdevadd(int devid, uint64_t base, unsigned int size, int phys) { |
562 | |
563 | int i; |
564 | |
565 | if(devid < 0) { |
566 | |
567 | devid = -1; |
568 | for(i = 0; i < NB_MAX_MDEVICES; i++) { /* Search all known memory devices */ |
569 | if(!(mdev[i].mdFlags & mdInited)) { /* Is this a free one? */ |
570 | if(devid < 0)devid = i; /* Remember first free one */ |
571 | continue; /* Skip check */ |
572 | } |
573 | if(!(((base + size -1 ) < mdev[i].mdBase) || ((mdev[i].mdBase + mdev[i].mdSize - 1) < base))) { /* Is there any overlap? */ |
574 | panic("mdevadd: attempt to add overlapping memory device at %016llX-%016llX\n" , mdev[i].mdBase, mdev[i].mdBase + mdev[i].mdSize - 1); |
575 | } |
576 | } |
577 | if(devid < 0) { /* Do we have free slots? */ |
578 | panic("mdevadd: attempt to add more than %d memory devices\n" , NB_MAX_MDEVICES); |
579 | } |
580 | } |
581 | else { |
582 | if(devid >= NB_MAX_MDEVICES) { /* Giving us something bogus? */ |
583 | panic("mdevadd: attempt to explicitly add a bogus memory device: %08X\n" , devid); |
584 | } |
585 | if(mdev[devid].mdFlags & mdInited) { /* Already there? */ |
586 | panic("mdevadd: attempt to explicitly add a previously defined memory device: %08X\n" , devid); |
587 | } |
588 | } |
589 | |
590 | if(mdevBMajor < 0) { /* Have we gotten a major number yet? */ |
591 | mdevBMajor = bdevsw_add(-1, &mdevbdevsw); /* Add to the table and figure out a major number */ |
592 | if (mdevBMajor < 0) { |
593 | printf("mdevadd: error - bdevsw_add() returned %d\n" , mdevBMajor); |
594 | return -1; |
595 | } |
596 | } |
597 | |
598 | if(mdevCMajor < 0) { /* Have we gotten a major number yet? */ |
599 | mdevCMajor = cdevsw_add_with_bdev(-1, &mdevcdevsw, mdevBMajor); /* Add to the table and figure out a major number */ |
600 | if (mdevCMajor < 0) { |
601 | printf("ramdevice_init: error - cdevsw_add() returned %d\n" , mdevCMajor); |
602 | return -1; |
603 | } |
604 | } |
605 | |
606 | mdev[devid].mdBDev = makedev(mdevBMajor, devid); /* Get the device number */ |
607 | mdev[devid].mdbdevb = devfs_make_node(mdev[devid].mdBDev, DEVFS_BLOCK, /* Make the node */ |
608 | UID_ROOT, GID_OPERATOR, |
609 | 0600, "md%d" , devid); |
610 | if (mdev[devid].mdbdevb == NULL) { /* Did we make one? */ |
611 | printf("mdevadd: devfs_make_node for block failed!\n" ); |
612 | return -1; /* Nope... */ |
613 | } |
614 | |
615 | mdev[devid].mdCDev = makedev(mdevCMajor, devid); /* Get the device number */ |
616 | mdev[devid].mdcdevb = devfs_make_node(mdev[devid].mdCDev, DEVFS_CHAR, /* Make the node */ |
617 | UID_ROOT, GID_OPERATOR, |
618 | 0600, "rmd%d" , devid); |
619 | if (mdev[devid].mdcdevb == NULL) { /* Did we make one? */ |
620 | printf("mdevadd: devfs_make_node for character failed!\n" ); |
621 | return -1; /* Nope... */ |
622 | } |
623 | |
624 | mdev[devid].mdBase = base; /* Set the base address of ram disk */ |
625 | mdev[devid].mdSize = size; /* Set the length of the ram disk */ |
626 | mdev[devid].mdSecsize = DEV_BSIZE; /* Set starting block size */ |
627 | if(phys) mdev[devid].mdFlags |= mdPhys; /* Show that we are in physical memory */ |
628 | mdev[devid].mdFlags |= mdInited; /* Show we are all set up */ |
629 | printf("Added memory device md%x/rmd%x (%08X/%08X) at %016llX for %016llX\n" , |
630 | devid, devid, mdev[devid].mdBDev, mdev[devid].mdCDev, base << 12, (uint64_t)size << 12); |
631 | return mdev[devid].mdBDev; |
632 | } |
633 | |
634 | |
635 | dev_t mdevlookup(int devid) { |
636 | |
637 | if((devid < 0) || (devid >= NB_MAX_MDEVICES)) return -1; /* Filter any bogus requests */ |
638 | if(!(mdev[devid].mdFlags & mdInited)) return -1; /* This one hasn't been defined */ |
639 | return mdev[devid].mdBDev; /* Return the device number */ |
640 | } |
641 | |
642 | void mdevremoveall(void) { |
643 | |
644 | int i; |
645 | |
646 | for(i = 0; i < NB_MAX_MDEVICES; i++) { |
647 | if(!(mdev[i].mdFlags & mdInited)) continue; /* Ignore unused mdevs */ |
648 | |
649 | devfs_remove(mdev[i].mdbdevb); /* Remove the block device */ |
650 | devfs_remove(mdev[i].mdcdevb); /* Remove the character device */ |
651 | |
652 | mdev[i].mdBase = 0; /* Clear the mdev's storage */ |
653 | mdev[i].mdSize = 0; |
654 | mdev[i].mdSecsize = 0; |
655 | mdev[i].mdFlags = 0; |
656 | mdev[i].mdBDev = 0; |
657 | mdev[i].mdCDev = 0; |
658 | mdev[i].mdbdevb = 0; |
659 | mdev[i].mdcdevb = 0; |
660 | } |
661 | } |
662 | |
663 | int |
664 | mdevgetrange(int devid, uint64_t *base, uint64_t *size) |
665 | { |
666 | assert(base); |
667 | assert(size); |
668 | |
669 | /* filter invalid request */ |
670 | if ((devid < 0) || (devid >= NB_MAX_MDEVICES)) { |
671 | return -1; |
672 | } |
673 | |
674 | /* filter non-initialized memory devices */ |
675 | if ((mdev[devid].mdFlags & mdInited) == 0) { |
676 | return -1; |
677 | } |
678 | |
679 | *base = mdev[devid].mdBase << 12; |
680 | *size = mdev[devid].mdSize << 12; |
681 | |
682 | /* make sure (base, size) is a valid range and will not overflow */ |
683 | assert(*size < (UINT64_MAX - *base)); |
684 | |
685 | return 0; |
686 | } |
687 | |
688 | |