2 * Copyright (c) 2010 Oleksandr Tymoshenko <gonzo@freebsd.org>
3 * Copyright (c) 2008 Semihalf, Grzegorz Bernacki
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 * from: FreeBSD: src/sys/arm/arm/minidump_machdep.c v214223
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/kerneldump.h>
39 #include <sys/msgbuf.h>
40 #include <sys/watchdog.h>
43 #include <vm/vm_page.h>
44 #include <vm/vm_phys.h>
45 #include <machine/atomic.h>
46 #include <machine/elf.h>
47 #include <machine/md_var.h>
48 #include <machine/vmparam.h>
49 #include <machine/minidump.h>
50 #include <machine/cache.h>
52 CTASSERT(sizeof(struct kerneldumpheader) == 512);
55 * Don't touch the first SIZEOF_METADATA bytes on the dump device. This
56 * is to protect us from metadata and to protect metadata from us.
58 #define SIZEOF_METADATA (64*1024)
60 uint32_t *vm_page_dump;
61 int vm_page_dump_size;
63 static struct kerneldumpheader kdh;
65 static off_t origdumplo;
67 /* Handle chunked writes. */
68 static uint64_t counter, progress, dumpsize;
69 /* Just auxiliary bufffer */
70 static char tmpbuffer[PAGE_SIZE];
72 extern pd_entry_t *kernel_segmap;
74 CTASSERT(sizeof(*vm_page_dump) == 4);
77 is_dumpable(vm_paddr_t pa)
82 if ((m = vm_phys_paddr_to_vm_page(pa)) != NULL)
83 return ((m->flags & PG_NODUMP) == 0);
84 for (i = 0; dump_avail[i] != 0 || dump_avail[i + 1] != 0; i += 2) {
85 if (pa >= dump_avail[i] && pa < dump_avail[i + 1])
92 dump_add_page(vm_paddr_t pa)
97 idx = pa >> 5; /* 2^5 = 32 */
99 atomic_set_int(&vm_page_dump[idx], 1ul << bit);
103 dump_drop_page(vm_paddr_t pa)
108 idx = pa >> 5; /* 2^5 = 32 */
110 atomic_clear_int(&vm_page_dump[idx], 1ul << bit);
117 } progress_track[10] = {
131 report_progress(uint64_t progress, uint64_t dumpsize)
135 sofar = 100 - ((progress * 100) / dumpsize);
136 for (i = 0; i < nitems(progress_track); i++) {
137 if (sofar < progress_track[i].min_per ||
138 sofar > progress_track[i].max_per)
140 if (progress_track[i].visited)
142 progress_track[i].visited = 1;
143 printf("..%d%%", sofar);
149 write_buffer(struct dumperinfo *di, char *ptr, size_t sz)
155 maxdumpsz = di->maxiosize;
157 if (maxdumpsz == 0) /* seatbelt */
158 maxdumpsz = PAGE_SIZE;
163 len = min(maxdumpsz, sz);
168 report_progress(progress, dumpsize);
169 counter &= (1<<22) - 1;
172 wdog_kern_pat(WD_LASTVAL);
175 error = dump_write(di, ptr, 0, dumplo, len);
182 panic("pa is not supported");
185 /* Check for user abort. */
190 printf(" (CTRL-C to abort) ");
197 minidumpsys(struct dumperinfo *di)
199 struct minidumphdr mdhdr;
203 vm_offset_t prev_pte = 0;
211 mips_dcache_wbinv_all();
214 /* Walk page table pages, set bits in vm_page_dump */
217 for (va = VM_MIN_KERNEL_ADDRESS; va < kernel_vm_end; va += NBPDR) {
218 ptesize += PAGE_SIZE;
219 pte = pmap_pte(kernel_pmap, va);
220 KASSERT(pte != NULL, ("pte for %jx is NULL", (uintmax_t)va));
221 for (i = 0; i < NPTEPG; i++) {
222 if (pte_test(&pte[i], PTE_V)) {
223 pa = TLBLO_PTE_TO_PA(pte[i]);
231 * Now mark pages from 0 to phys_avail[0], that's where kernel
232 * and pages allocated by pmap_steal reside
234 for (pa = 0; pa < phys_avail[0]; pa += PAGE_SIZE) {
239 /* Calculate dump size. */
241 dumpsize += round_page(msgbufp->msg_size);
242 dumpsize += round_page(vm_page_dump_size);
244 for (i = 0; i < vm_page_dump_size / sizeof(*vm_page_dump); i++) {
245 bits = vm_page_dump[i];
248 pa = (((uint64_t)i * sizeof(*vm_page_dump) * NBBY) +
250 /* Clear out undumpable pages now if needed */
252 dumpsize += PAGE_SIZE;
255 bits &= ~(1ul << bit);
259 dumpsize += PAGE_SIZE;
261 /* Determine dump offset on device. */
262 if (di->mediasize < SIZEOF_METADATA + dumpsize + di->blocksize * 2 +
263 kerneldumpcrypto_dumpkeysize(di->kdc)) {
268 origdumplo = dumplo = di->mediaoffset + di->mediasize - dumpsize;
269 dumplo -= di->blocksize * 2;
270 dumplo -= kerneldumpcrypto_dumpkeysize(di->kdc);
273 /* Initialize kernel dump crypto. */
274 error = kerneldumpcrypto_init(di->kdc);
278 /* Initialize mdhdr */
279 bzero(&mdhdr, sizeof(mdhdr));
280 strcpy(mdhdr.magic, MINIDUMP_MAGIC);
281 mdhdr.version = MINIDUMP_VERSION;
282 mdhdr.msgbufsize = msgbufp->msg_size;
283 mdhdr.bitmapsize = vm_page_dump_size;
284 mdhdr.ptesize = ptesize;
285 mdhdr.kernbase = VM_MIN_KERNEL_ADDRESS;
287 mkdumpheader(&kdh, KERNELDUMPMAGIC, KERNELDUMP_MIPS_VERSION, dumpsize,
288 kerneldumpcrypto_dumpkeysize(di->kdc), di->blocksize);
290 printf("Dumping %llu out of %ju MB:", (long long)dumpsize >> 20,
291 ptoa((uintmax_t)physmem) / 1048576);
294 error = dump_write_header(di, &kdh, 0, dumplo);
297 dumplo += di->blocksize;
300 error = dump_write_key(di, 0, dumplo);
303 dumplo += kerneldumpcrypto_dumpkeysize(di->kdc);
306 bzero(tmpbuffer, sizeof(tmpbuffer));
307 bcopy(&mdhdr, tmpbuffer, sizeof(mdhdr));
308 error = write_buffer(di, tmpbuffer, PAGE_SIZE);
312 /* Dump msgbuf up front */
313 error = write_buffer(di, (char *)msgbufp->msg_ptr,
314 round_page(msgbufp->msg_size));
319 error = write_buffer(di, (char *)vm_page_dump,
320 round_page(vm_page_dump_size));
324 /* Dump kernel page table pages */
325 for (va = VM_MIN_KERNEL_ADDRESS; va < kernel_vm_end; va += NBPDR) {
326 pte = pmap_pte(kernel_pmap, va);
327 KASSERT(pte != NULL, ("pte for %jx is NULL", (uintmax_t)va));
329 prev_pte = (vm_offset_t)pte;
333 if ((vm_offset_t)pte == (prev_pte + count * PAGE_SIZE))
336 error = write_buffer(di, (char*)prev_pte,
341 prev_pte = (vm_offset_t)pte;
347 error = write_buffer(di, (char*)prev_pte, count * PAGE_SIZE);
354 /* Dump memory chunks page by page*/
355 for (i = 0; i < vm_page_dump_size / sizeof(*vm_page_dump); i++) {
356 bits = vm_page_dump[i];
359 pa = (((uint64_t)i * sizeof(*vm_page_dump) * NBBY) +
361 dump_va = pmap_kenter_temporary(pa, 0);
362 error = write_buffer(di, dump_va, PAGE_SIZE);
365 pmap_kenter_temporary_free(pa);
366 bits &= ~(1ul << bit);
371 error = dump_write_header(di, &kdh, 0, dumplo);
374 dumplo += di->blocksize;
376 /* Signal completion, signoff and exit stage left. */
377 dump_write(di, NULL, 0, 0, 0);
378 printf("\nDump complete\n");
385 if (error == ECANCELED)
386 printf("\nDump aborted\n");
387 else if (error == ENOSPC)
388 printf("\nDump failed. Partition too small.\n");
390 printf("\n** DUMP FAILED (ERROR %d) **\n", error);