2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2010 Oleksandr Tymoshenko
5 * Copyright (c) 2008 Semihalf, Grzegorz Bernacki
6 * Copyright (c) 2006 Peter Wemm
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * From: FreeBSD: src/lib/libkvm/kvm_minidump_arm.c r214223
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
36 * MIPS machine dependent routines for kvm and minidumps.
39 #include <sys/param.h>
48 #include "../../sys/mips/include/cpuregs.h"
49 #include "../../sys/mips/include/minidump.h"
51 #include "kvm_private.h"
54 #define mips_round_page(x) roundup2((kvaddr_t)(x), MIPS_PAGE_SIZE)
57 struct minidumphdr hdr;
62 _mips_minidump_probe(kvm_t *kd)
65 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32 &&
66 kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
68 if (kd->nlehdr.e_machine != EM_MIPS)
70 return (_kvm_is_minidump(kd));
74 _mips_minidump_freevtop(kvm_t *kd)
76 struct vmstate *vm = kd->vmst;
83 _mips_minidump_initvtop(kvm_t *kd)
86 off_t off, sparse_off;
88 vmst = _kvm_malloc(kd, sizeof(*vmst));
90 _kvm_err(kd, kd->program, "cannot allocate vm");
96 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64 ||
97 kd->nlehdr.e_flags & EF_MIPS_ABI2)
102 if (pread(kd->pmfd, &vmst->hdr,
103 sizeof(vmst->hdr), 0) != sizeof(vmst->hdr)) {
104 _kvm_err(kd, kd->program, "cannot read dump header");
108 if (strncmp(MINIDUMP_MAGIC, vmst->hdr.magic,
109 sizeof(vmst->hdr.magic)) != 0) {
110 _kvm_err(kd, kd->program, "not a minidump for this platform");
113 vmst->hdr.version = _kvm32toh(kd, vmst->hdr.version);
114 if (vmst->hdr.version != MINIDUMP_VERSION) {
115 _kvm_err(kd, kd->program, "wrong minidump version. "
116 "Expected %d got %d", MINIDUMP_VERSION, vmst->hdr.version);
119 vmst->hdr.msgbufsize = _kvm32toh(kd, vmst->hdr.msgbufsize);
120 vmst->hdr.bitmapsize = _kvm32toh(kd, vmst->hdr.bitmapsize);
121 vmst->hdr.ptesize = _kvm32toh(kd, vmst->hdr.ptesize);
122 vmst->hdr.kernbase = _kvm64toh(kd, vmst->hdr.kernbase);
123 vmst->hdr.dmapbase = _kvm64toh(kd, vmst->hdr.dmapbase);
124 vmst->hdr.dmapend = _kvm64toh(kd, vmst->hdr.dmapend);
126 /* Skip header and msgbuf */
127 off = MIPS_PAGE_SIZE + mips_round_page(vmst->hdr.msgbufsize);
129 sparse_off = off + mips_round_page(vmst->hdr.bitmapsize) +
130 mips_round_page(vmst->hdr.ptesize);
131 if (_kvm_pt_init(kd, vmst->hdr.bitmapsize, off, sparse_off,
132 MIPS_PAGE_SIZE, sizeof(uint32_t)) == -1) {
135 off += mips_round_page(vmst->hdr.bitmapsize);
137 if (_kvm_pmap_init(kd, vmst->hdr.ptesize, off) == -1) {
140 off += mips_round_page(vmst->hdr.ptesize);
146 _mips_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
149 mips_physaddr_t offset, a;
157 _kvm_err(kd, 0, "_mips_minidump_kvatop called in live kernel!");
161 offset = va & MIPS_PAGE_MASK;
162 /* Operate with page-aligned address */
163 va &= ~MIPS_PAGE_MASK;
166 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
167 if (va >= MIPS_XKPHYS_START && va < MIPS_XKPHYS_END) {
168 a = va & MIPS_XKPHYS_PHYS_MASK;
171 if (va >= MIPS64_KSEG0_START && va < MIPS64_KSEG0_END) {
172 a = va & MIPS_KSEG0_PHYS_MASK;
175 if (va >= MIPS64_KSEG1_START && va < MIPS64_KSEG1_END) {
176 a = va & MIPS_KSEG0_PHYS_MASK;
180 if (va >= MIPS32_KSEG0_START && va < MIPS32_KSEG0_END) {
181 a = va & MIPS_KSEG0_PHYS_MASK;
184 if (va >= MIPS32_KSEG1_START && va < MIPS32_KSEG1_END) {
185 a = va & MIPS_KSEG0_PHYS_MASK;
189 if (va >= vm->hdr.kernbase) {
190 pteindex = (va - vm->hdr.kernbase) >> MIPS_PAGE_SHIFT;
191 if (vm->pte_size == 64) {
192 valid = pteindex < vm->hdr.ptesize / sizeof(pte64);
193 if (pteindex >= vm->hdr.ptesize / sizeof(pte64))
195 pte64 = _mips64_pte_get(kd, pteindex);
196 valid = pte64 & MIPS_PTE_V;
198 a = MIPS64_PTE_TO_PA(pte64);
200 if (pteindex >= vm->hdr.ptesize / sizeof(pte32))
202 pte32 = _mips32_pte_get(kd, pteindex);
203 valid = pte32 & MIPS_PTE_V;
205 a = MIPS32_PTE_TO_PA(pte32);
208 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: pte "
213 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: virtual "
214 "address 0x%jx not minidumped", (uintmax_t)va);
219 ofs = _kvm_pt_find(kd, a, MIPS_PAGE_SIZE);
221 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: physical "
222 "address 0x%jx not in minidump", (uintmax_t)a);
227 return (MIPS_PAGE_SIZE - offset);
231 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
237 _mips_native(kvm_t *kd)
239 _mips_native(kvm_t *kd __unused)
245 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
248 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32)
251 if (!(kd->nlehdr.e_flags & EF_MIPS_ABI2))
254 if (kd->nlehdr.e_flags & EF_MIPS_ABI2)
258 #if _BYTE_ORDER == _LITTLE_ENDIAN
259 return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB);
261 return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2MSB);
275 _mips_iterator_init(struct mips_iter *it, kvm_t *kd)
277 struct vmstate *vm = kd->vmst;
281 if (vm->pte_size == 64)
282 it->nptes = vm->hdr.ptesize / sizeof(mips64_pte_t);
284 it->nptes = vm->hdr.ptesize / sizeof(mips32_pte_t);
289 _mips_iterator_next(struct mips_iter *it, u_long *pa, u_long *va, u_long *dva,
292 struct vmstate *vm = it->kd->vmst;
298 * mips/mips/pmap.c: init_pte_prot / pmap_protect indicate that all
299 * pages are R|X at least.
301 *prot = VM_PROT_READ | VM_PROT_EXECUTE;
305 for (;it->pteindex < it->nptes && found == 0; it->pteindex++) {
306 if (vm->pte_size == 64) {
307 pte64 = _mips64_pte_get(it->kd, it->pteindex);
308 if ((pte64 & MIPS_PTE_V) == 0)
310 if ((pte64 & MIPS64_PTE_RO) == 0)
311 *prot |= VM_PROT_WRITE;
312 *pa = MIPS64_PTE_TO_PA(pte64);
314 pte32 = _mips32_pte_get(it->kd, it->pteindex);
315 if ((pte32 & MIPS_PTE_V) == 0)
317 if ((pte32 & MIPS32_PTE_RO) == 0)
318 *prot |= VM_PROT_WRITE;
319 *pa = MIPS32_PTE_TO_PA(pte32);
321 *va = vm->hdr.kernbase + (it->pteindex << MIPS_PAGE_SHIFT);
323 /* advance pteindex regardless */
330 _mips_minidump_walk_pages(kvm_t *kd, kvm_walk_pages_cb_t *cb, void *arg)
336 /* Generate direct mapped entries; need page entries for prot etc? */
337 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
338 /* MIPS_XKPHYS_START..MIPS_XKPHYS_END */
339 /* MIPS64_KSEG0_START..MIPS64_KSEG0_END */
340 /* MIPS64_KSEG1_START..MIPS64_KSEG1_START */
342 /* MIPS32_KSEG0_START..MIPS32_KSEG0_END */
343 /* MIPS32_KSEG1_START..MIPS32_KSEG1_END */
346 _mips_iterator_init(&it, kd);
347 while (_mips_iterator_next(&it, &pa, &va, &dva, &prot)) {
348 if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
349 prot, MIPS_PAGE_SIZE, 0)) {
356 static struct kvm_arch kvm_mips_minidump = {
357 .ka_probe = _mips_minidump_probe,
358 .ka_initvtop = _mips_minidump_initvtop,
359 .ka_freevtop = _mips_minidump_freevtop,
360 .ka_kvatop = _mips_minidump_kvatop,
361 .ka_native = _mips_native,
362 .ka_walk_pages = _mips_minidump_walk_pages,
365 KVM_ARCH(kvm_mips_minidump);