1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <sys/param.h>
27 #include <sys/promif.h>
28 #include <sys/salib.h>
29 /* EXPORT DELETE START */
30 #include <bootlog.h>
31 /* EXPORT DELETE END */
32 #include "ramdisk.h"
33
34 #include <sys/param.h>
35 #include <sys/fcntl.h>
36 #include <sys/obpdefs.h>
37 #include <sys/reboot.h>
38 #include <sys/promif.h>
39 #include <sys/stat.h>
40 #include <sys/bootvfs.h>
41 #include <sys/platnames.h>
42 #include <sys/salib.h>
43 #include <sys/elf.h>
44 #include <sys/link.h>
45 #include <sys/auxv.h>
46 #include <sys/boot_policy.h>
47 #include <sys/boot_redirect.h>
48 #include <sys/bootconf.h>
49 #include <sys/boot.h>
50 #include "boot_plat.h"
51
52
53 static char ramdisk_preamble_fth[] =
54
55 ": find-abort ( name$ -- ) "
56 " .\" Can't find \" type abort "
57 "; "
58
59 ": get-package ( pkg$ -- ph ) "
60 " 2dup find-package 0= if "
61 " find-abort "
62 " then ( pkg$ ph ) "
63 " nip nip ( ph ) "
64 "; "
65
66 "\" /openprom/client-services\" get-package constant cif-ph "
67
68 "instance defer cif-open ( dev$ -- ihandle|0 ) "
69 "instance defer cif-close ( ihandle -- ) "
70
71 ": find-cif-method ( adr,len -- acf ) "
72 " 2dup cif-ph find-method 0= if ( adr,len ) "
73 " find-abort "
74 " then ( adr,len acf ) "
75 " nip nip ( acf ) "
76 "; "
77
78 "\" open\" find-cif-method to cif-open "
79 "\" close\" find-cif-method to cif-close "
80
81 "0 value dev-ih "
82
83 "d# 100 buffer: open-cstr "
84
85 ": dev-open ( dev$ -- okay? ) "
86 /* copy to C string for open */
87 " 0 over open-cstr + c! "
88 " open-cstr swap move "
89 " open-cstr cif-open dup if "
90 " dup to dev-ih "
91 " then "
92 "; "
93
94 ": dev-close ( -- ) "
95 " dev-ih cif-close "
96 " 0 to dev-ih "
97 "; "
98
99 ": open-abort ( file$ -- ) "
100 " .\" Can't open \" type abort "
101 "; "
102 ;
103
104 static char ramdisk_fth[] =
105
106 "\" /\" get-package push-package "
107
108 "new-device "
109 " \" %s\" device-name "
110 " "
111 " \" block\" device-type "
112 " \" SUNW,ramdisk\" encode-string \" compatible\" property"
113
114 " 0 instance value current-offset "
115 " "
116 " 0 value ramdisk-base-va "
117 " 0 value ramdisk-size "
118 " 0 value alloc-size "
119 " "
120 " : set-props "
121 " ramdisk-size encode-int \" size\" property "
122 " ramdisk-base-va encode-int \" address\" property "
123 " alloc-size encode-int \" alloc-size\" property "
124 " ; "
125 " set-props "
126 " "
127 " : current-va ( -- adr ) ramdisk-base-va current-offset + ; "
128 " "
129 " external "
130 " "
131 " : open ( -- okay? ) "
132 /* " .\" ramdisk-open\" cr " */
133 " true "
134 " ; "
135 " "
136 " : close ( -- ) "
137 " ; "
138 " "
139 " : seek ( off.low off.high -- error? ) "
140 /* " 2dup .\" ramdisk-seek: \" .x .x " */
141 " drop dup ramdisk-size > if "
142 /* " .\" fail\" cr " */
143 " drop true exit ( failed ) "
144 " then "
145 " to current-offset false ( succeeded ) "
146 /* " .\" OK\" cr " */
147 " ; "
148 " "
149 " : read ( addr len -- actual-len ) "
150 /* " 2dup .\" ramdisk-read: \" .x .x " */
151 " dup current-offset + ( addr len new-off ) "
152 " dup ramdisk-size > if "
153 " ramdisk-size - - ( addr len' ) "
154 " ramdisk-size ( addr len new-off ) "
155 " then -rot ( new-off addr len ) "
156 " tuck current-va -rot move ( new-off len ) "
157 " swap to current-offset ( len ) "
158 /* " dup .x cr " */
159 " ; "
160 " "
161 " : create ( alloc-sz base size -- ) "
162 " to ramdisk-size "
163 " to ramdisk-base-va "
164 " to alloc-size "
165 " set-props "
166 " ; "
167 " "
168 "finish-device "
169 "pop-package "
170
171 "\" /%s\" 2dup dev-open 0= if "
172 " open-abort "
173 "then 2drop "
174
175 /* %x %x %x will be replaced by alloc-sz, base, size respectively */
176 "h# %x h# %x h# %x ( alloc-sz base size ) "
177 "\" create\" dev-ih $call-method ( ) "
178 "dev-close "
179
180 ;
181
182 char ramdisk_bootable[] =
183
184 "\" /chosen\" get-package push-package "
185 " \" nfs\" encode-string \" fstype\" property "
186 " \" /%s\" encode-string \" bootarchive\" property "
187 "pop-package "
188
189 " h# %x d# 512 + to load-base init-program "
190 ;
191
192 #define BOOT_ARCHIVE_ALLOC_SIZE (32 * 1024 * 1024) /* 32 MB */
193 #define BOOTFS_VIRT ((caddr_t)0x50f00000)
194 #define ROOTFS_VIRT ((caddr_t)0x52000000)
195
196 struct ramdisk_attr {
197 char *rd_name;
198 caddr_t rd_base;
199 size_t rd_size;
200 } ramdisk_attr[] = {
201 RD_BOOTFS, BOOTFS_VIRT, 0,
202 RD_ROOTFS, ROOTFS_VIRT, 0,
203 0
204 };
205
206 static struct ramdisk_attr *
ramdisk_lookup(char * ramdisk_name)207 ramdisk_lookup(char *ramdisk_name)
208 {
209 int i;
210
211 for (i = 0; ramdisk_attr[i].rd_name != 0; i++) {
212 if (strcmp(ramdisk_name, ramdisk_attr[i].rd_name) == 0) {
213 return (&ramdisk_attr[i]);
214 }
215 }
216 return (NULL);
217 }
218
219 static void
ramdisk_free_mem(caddr_t addr,size_t size)220 ramdisk_free_mem(caddr_t addr, size_t size)
221 {
222 caddr_t end_addr;
223
224 for (end_addr = addr + size; addr < end_addr;
225 addr += BOOT_ARCHIVE_ALLOC_SIZE) {
226 prom_free(addr, MIN(BOOT_ARCHIVE_ALLOC_SIZE, end_addr - addr));
227 }
228 }
229
230 /*
231 * Allocate memory for ramdisk image.
232 */
233 static caddr_t
ramdisk_alloc_mem(caddr_t addr,size_t size)234 ramdisk_alloc_mem(caddr_t addr, size_t size)
235 {
236 caddr_t virt = addr;
237 caddr_t end_addr;
238
239 for (end_addr = virt + size; virt < end_addr;
240 virt += BOOT_ARCHIVE_ALLOC_SIZE) {
241 if (prom_alloc(virt,
242 MIN(BOOT_ARCHIVE_ALLOC_SIZE, end_addr - virt),
243 1) == NULL) {
244 ramdisk_free_mem(addr, virt - addr);
245 return (NULL);
246 }
247 }
248 return (addr);
249 }
250
251 caddr_t
create_ramdisk(char * ramdisk_name,size_t size,char ** devpath)252 create_ramdisk(char *ramdisk_name, size_t size, char **devpath)
253 {
254 char *fth_buf;
255 size_t buf_size;
256 struct ramdisk_attr *rdp;
257 char tdevpath[80];
258 caddr_t virt;
259 static int need_preamble = 1;
260
261 /*
262 * lookup ramdisk name.
263 */
264 if ((rdp = ramdisk_lookup(ramdisk_name)) == NULL)
265 prom_panic("invalid ramdisk name");
266
267 virt = rdp->rd_base;
268
269 /*
270 * Allocate memory.
271 */
272 size = roundup(size, PAGESIZE);
273 if (ramdisk_alloc_mem(virt, size) == NULL)
274 prom_panic("can't alloc ramdisk memory");
275
276 rdp->rd_size = size;
277
278 if (need_preamble) {
279 prom_interpret(ramdisk_preamble_fth, 0, 0, 0, 0, 0);
280 need_preamble = 0;
281 }
282
283 /*
284 * add some space to the size to accommodate a few words in the
285 * snprintf() below.
286 */
287 buf_size = sizeof (ramdisk_fth) + 80;
288
289 fth_buf = bkmem_alloc(buf_size);
290 if (fth_buf == NULL)
291 prom_panic("unable to allocate Forth buffer for ramdisk");
292
293 (void) snprintf(fth_buf, buf_size, ramdisk_fth,
294 ramdisk_name, ramdisk_name,
295 BOOT_ARCHIVE_ALLOC_SIZE, virt, size);
296
297 prom_interpret(fth_buf, 0, 0, 0, 0, 0);
298 bkmem_free(fth_buf, buf_size);
299
300 if (devpath != NULL) {
301 (void) snprintf(tdevpath, sizeof (tdevpath), "/%s:nolabel",
302 ramdisk_name);
303 *devpath = strdup(tdevpath);
304 }
305
306 return (virt);
307 }
308
309 void
destroy_ramdisk(char * ramdisk_name)310 destroy_ramdisk(char *ramdisk_name)
311 {
312 struct ramdisk_attr *rdp;
313
314 /*
315 * lookup ramdisk name.
316 */
317 if ((rdp = ramdisk_lookup(ramdisk_name)) == NULL)
318 prom_panic("invalid ramdisk name");
319
320 ramdisk_free_mem(rdp->rd_base, rdp->rd_size);
321 rdp->rd_size = 0;
322 }
323
324 /*
325 * change cwp! to drop in the 2nd word of (init-program) - really
326 * init-c-stack, but that word has no header.
327 * (you are not expected to undertsnad this)
328 */
329 char obpfix[] = "' drop ' cwp! ' (init-program) >body ta1+ token@ (patch";
330 char obpver[OBP_MAXPROPNAME];
331 const char badver[] = "OBP 4.27.";
332
333
334 void
boot_ramdisk(char * ramdisk_name)335 boot_ramdisk(char *ramdisk_name)
336 {
337 char *fth_buf;
338 size_t buf_size;
339 struct ramdisk_attr *rdp;
340 void do_sg_go(void);
341
342 /*
343 * OBP revs 4.27.0 to 4.27.8 started using
344 * windowed regs for the forth kernel, but
345 * init-program still blindly 0'd %cwp, which
346 * causes predictably disaterous consequences
347 * when called with %cwp != 0.
348 *
349 * We detect and fix this here
350 */
351 if (prom_version_name(obpver, OBP_MAXPROPNAME) != -1 &&
352 strncmp(obpver, badver, sizeof (badver) - 1) == 0) {
353 char ch = obpver[sizeof (badver) - 1];
354
355 if (ch >= '0' && ch <= '8') {
356 prom_interpret(obpfix, 0, 0, 0, 0, 0);
357 }
358 }
359
360 /* close all open devices */
361 closeall(1);
362
363 /*
364 * lookup ramdisk name.
365 */
366 if ((rdp = ramdisk_lookup(ramdisk_name)) == NULL)
367 prom_panic("invalid ramdisk name");
368
369 /*
370 * add some space to the size to accommodate a few words in the
371 * snprintf() below.
372 */
373 buf_size = sizeof (ramdisk_bootable) + 80;
374
375 fth_buf = bkmem_alloc(buf_size);
376 if (fth_buf == NULL)
377 prom_panic("unable to allocate Forth buffer for ramdisk");
378
379 (void) snprintf(fth_buf, buf_size, ramdisk_bootable,
380 ramdisk_name, rdp->rd_base);
381
382 prom_interpret(fth_buf, 0, 0, 0, 0, 0);
383
384 /*
385 * Ugh Serengeti proms don't execute C programs
386 * in init-program, and 'go' doesn't work when
387 * launching a second C program (inetboot itself
388 * was launched as the 1st C program). Nested fcode
389 * programs work, but that doesn't help the kernel.
390 */
391 do_sg_go();
392 }
393
394 void
do_sg_go()395 do_sg_go()
396 {
397 pnode_t chosen = prom_chosennode();
398 Elf64_Ehdr *ehdr;
399 Elf64_Addr entry;
400 uint32_t eadr;
401 extern int is_sg;
402 extern caddr_t sg_addr;
403 extern size_t sg_len;
404
405 if (!is_sg)
406 prom_panic("do_sg_go");
407
408 /*
409 * The ramdisk bootblk left a pointer to the elf image
410 * in 'elfheader-address' Use it to find the kernel's
411 * entry point.
412 */
413 if (prom_getprop(chosen, "elfheader-address", (caddr_t)&eadr) == -1)
414 prom_panic("no elf header property");
415 ehdr = (Elf64_Ehdr *)(uintptr_t)eadr;
416 if (ehdr->e_machine != EM_SPARCV9)
417 prom_panic("bad ELF header");
418 entry = ehdr->e_entry;
419
420 /*
421 * free extra bootmem
422 */
423 prom_free(sg_addr, sg_len);
424
425 /*
426 * Use pre-newboot's exitto64() to launch the kernel
427 */
428 exitto64((int (*)())entry, NULL);
429 prom_panic("exitto returned");
430 }
431