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/cca.h"
50 #include "../../sys/mips/include/cpuregs.h"
51 #include "../../sys/mips/include/minidump.h"
53 #include "kvm_private.h"
56 #define mips_round_page(x) roundup2((kvaddr_t)(x), MIPS_PAGE_SIZE)
59 struct minidumphdr hdr;
64 _mips_minidump_probe(kvm_t *kd)
67 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32 &&
68 kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
70 if (kd->nlehdr.e_machine != EM_MIPS)
72 return (_kvm_is_minidump(kd));
76 _mips_minidump_freevtop(kvm_t *kd)
78 struct vmstate *vm = kd->vmst;
85 _mips_minidump_initvtop(kvm_t *kd)
88 off_t off, sparse_off;
90 vmst = _kvm_malloc(kd, sizeof(*vmst));
92 _kvm_err(kd, kd->program, "cannot allocate vm");
98 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64 ||
99 kd->nlehdr.e_flags & EF_MIPS_ABI2)
104 if (pread(kd->pmfd, &vmst->hdr,
105 sizeof(vmst->hdr), 0) != sizeof(vmst->hdr)) {
106 _kvm_err(kd, kd->program, "cannot read dump header");
110 if (strncmp(MINIDUMP_MAGIC, vmst->hdr.magic,
111 sizeof(vmst->hdr.magic)) != 0) {
112 _kvm_err(kd, kd->program, "not a minidump for this platform");
115 vmst->hdr.version = _kvm32toh(kd, vmst->hdr.version);
116 if (vmst->hdr.version != MINIDUMP_VERSION) {
117 _kvm_err(kd, kd->program, "wrong minidump version. "
118 "Expected %d got %d", MINIDUMP_VERSION, vmst->hdr.version);
121 vmst->hdr.msgbufsize = _kvm32toh(kd, vmst->hdr.msgbufsize);
122 vmst->hdr.bitmapsize = _kvm32toh(kd, vmst->hdr.bitmapsize);
123 vmst->hdr.ptesize = _kvm32toh(kd, vmst->hdr.ptesize);
124 vmst->hdr.kernbase = _kvm64toh(kd, vmst->hdr.kernbase);
125 vmst->hdr.dmapbase = _kvm64toh(kd, vmst->hdr.dmapbase);
126 vmst->hdr.dmapend = _kvm64toh(kd, vmst->hdr.dmapend);
128 /* Skip header and msgbuf */
129 off = MIPS_PAGE_SIZE + mips_round_page(vmst->hdr.msgbufsize);
131 sparse_off = off + mips_round_page(vmst->hdr.bitmapsize) +
132 mips_round_page(vmst->hdr.ptesize);
133 if (_kvm_pt_init(kd, vmst->hdr.bitmapsize, off, sparse_off,
134 MIPS_PAGE_SIZE, sizeof(uint32_t)) == -1) {
137 off += mips_round_page(vmst->hdr.bitmapsize);
139 if (_kvm_pmap_init(kd, vmst->hdr.ptesize, off) == -1) {
142 off += mips_round_page(vmst->hdr.ptesize);
148 _mips_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
151 mips_physaddr_t offset, a;
159 _kvm_err(kd, 0, "_mips_minidump_kvatop called in live kernel!");
163 offset = va & MIPS_PAGE_MASK;
164 /* Operate with page-aligned address */
165 va &= ~MIPS_PAGE_MASK;
168 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
169 if (va >= MIPS_XKPHYS_START && va < MIPS_XKPHYS_END) {
170 a = va & MIPS_XKPHYS_PHYS_MASK;
173 if (va >= MIPS64_KSEG0_START && va < MIPS64_KSEG0_END) {
174 a = va & MIPS_KSEG0_PHYS_MASK;
177 if (va >= MIPS64_KSEG1_START && va < MIPS64_KSEG1_END) {
178 a = va & MIPS_KSEG0_PHYS_MASK;
182 if (va >= MIPS32_KSEG0_START && va < MIPS32_KSEG0_END) {
183 a = va & MIPS_KSEG0_PHYS_MASK;
186 if (va >= MIPS32_KSEG1_START && va < MIPS32_KSEG1_END) {
187 a = va & MIPS_KSEG0_PHYS_MASK;
191 if (va >= vm->hdr.kernbase) {
192 pteindex = (va - vm->hdr.kernbase) >> MIPS_PAGE_SHIFT;
193 if (vm->pte_size == 64) {
194 valid = pteindex < vm->hdr.ptesize / sizeof(pte64);
195 if (pteindex >= vm->hdr.ptesize / sizeof(pte64))
197 pte64 = _mips64_pte_get(kd, pteindex);
198 valid = pte64 & MIPS_PTE_V;
200 a = MIPS64_PTE_TO_PA(pte64);
202 if (pteindex >= vm->hdr.ptesize / sizeof(pte32))
204 pte32 = _mips32_pte_get(kd, pteindex);
205 valid = pte32 & MIPS_PTE_V;
207 a = MIPS32_PTE_TO_PA(pte32);
210 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: pte "
215 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: virtual "
216 "address 0x%jx not minidumped", (uintmax_t)va);
221 ofs = _kvm_pt_find(kd, a, MIPS_PAGE_SIZE);
223 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: physical "
224 "address 0x%jx not in minidump", (uintmax_t)a);
229 return (MIPS_PAGE_SIZE - offset);
233 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
239 _mips_native(kvm_t *kd)
241 _mips_native(kvm_t *kd __unused)
247 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
250 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32)
253 if (!(kd->nlehdr.e_flags & EF_MIPS_ABI2))
256 if (kd->nlehdr.e_flags & EF_MIPS_ABI2)
260 #if _BYTE_ORDER == _LITTLE_ENDIAN
261 return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB);
263 return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2MSB);
277 _mips_iterator_init(struct mips_iter *it, kvm_t *kd)
279 struct vmstate *vm = kd->vmst;
283 if (vm->pte_size == 64)
284 it->nptes = vm->hdr.ptesize / sizeof(mips64_pte_t);
286 it->nptes = vm->hdr.ptesize / sizeof(mips32_pte_t);
291 _mips_iterator_next(struct mips_iter *it, u_long *pa, u_long *va, u_long *dva,
294 struct vmstate *vm = it->kd->vmst;
300 * mips/mips/pmap.c: init_pte_prot / pmap_protect indicate that all
301 * pages are R|X at least.
303 *prot = VM_PROT_READ | VM_PROT_EXECUTE;
307 for (;it->pteindex < it->nptes && found == 0; it->pteindex++) {
308 if (vm->pte_size == 64) {
309 pte64 = _mips64_pte_get(it->kd, it->pteindex);
310 if ((pte64 & MIPS_PTE_V) == 0)
312 if ((pte64 & MIPS64_PTE_RO) == 0)
313 *prot |= VM_PROT_WRITE;
314 *pa = MIPS64_PTE_TO_PA(pte64);
316 pte32 = _mips32_pte_get(it->kd, it->pteindex);
317 if ((pte32 & MIPS_PTE_V) == 0)
319 if ((pte32 & MIPS32_PTE_RO) == 0)
320 *prot |= VM_PROT_WRITE;
321 *pa = MIPS32_PTE_TO_PA(pte32);
323 *va = vm->hdr.kernbase + (it->pteindex << MIPS_PAGE_SHIFT);
325 /* advance pteindex regardless */
332 _mips_minidump_walk_pages(kvm_t *kd, kvm_walk_pages_cb_t *cb, void *arg)
338 /* Generate direct mapped entries; need page entries for prot etc? */
339 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
340 /* MIPS_XKPHYS_START..MIPS_XKPHYS_END */
341 /* MIPS64_KSEG0_START..MIPS64_KSEG0_END */
342 /* MIPS64_KSEG1_START..MIPS64_KSEG1_START */
344 /* MIPS32_KSEG0_START..MIPS32_KSEG0_END */
345 /* MIPS32_KSEG1_START..MIPS32_KSEG1_END */
348 _mips_iterator_init(&it, kd);
349 while (_mips_iterator_next(&it, &pa, &va, &dva, &prot)) {
350 if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
351 prot, MIPS_PAGE_SIZE, 0)) {
358 static struct kvm_arch kvm_mips_minidump = {
359 .ka_probe = _mips_minidump_probe,
360 .ka_initvtop = _mips_minidump_initvtop,
361 .ka_freevtop = _mips_minidump_freevtop,
362 .ka_kvatop = _mips_minidump_kvatop,
363 .ka_native = _mips_native,
364 .ka_walk_pages = _mips_minidump_walk_pages,
367 KVM_ARCH(kvm_mips_minidump);