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, dump_avail_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 && vmst->hdr.version != 1) {
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);
127 vmst->hdr.dumpavailsize = vmst->hdr.version == MINIDUMP_VERSION ?
128 _kvm32toh(kd, vmst->hdr.dumpavailsize) : 0;
130 /* Skip header and msgbuf */
131 dump_avail_off = MIPS_PAGE_SIZE + mips_round_page(vmst->hdr.msgbufsize);
133 /* Skip dump_avail */
134 off = dump_avail_off + mips_round_page(vmst->hdr.dumpavailsize);
136 sparse_off = off + mips_round_page(vmst->hdr.bitmapsize) +
137 mips_round_page(vmst->hdr.ptesize);
138 if (_kvm_pt_init(kd, vmst->hdr.dumpavailsize, dump_avail_off,
139 vmst->hdr.bitmapsize, off, sparse_off, MIPS_PAGE_SIZE,
140 sizeof(uint32_t)) == -1) {
143 off += mips_round_page(vmst->hdr.bitmapsize);
145 if (_kvm_pmap_init(kd, vmst->hdr.ptesize, off) == -1) {
148 off += mips_round_page(vmst->hdr.ptesize);
154 _mips_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
157 mips_physaddr_t offset, a;
165 _kvm_err(kd, 0, "_mips_minidump_kvatop called in live kernel!");
169 offset = va & MIPS_PAGE_MASK;
170 /* Operate with page-aligned address */
171 va &= ~MIPS_PAGE_MASK;
174 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
175 if (va >= MIPS_XKPHYS_START && va < MIPS_XKPHYS_END) {
176 a = va & MIPS_XKPHYS_PHYS_MASK;
179 if (va >= MIPS64_KSEG0_START && va < MIPS64_KSEG0_END) {
180 a = va & MIPS_KSEG0_PHYS_MASK;
183 if (va >= MIPS64_KSEG1_START && va < MIPS64_KSEG1_END) {
184 a = va & MIPS_KSEG0_PHYS_MASK;
188 if (va >= MIPS32_KSEG0_START && va < MIPS32_KSEG0_END) {
189 a = va & MIPS_KSEG0_PHYS_MASK;
192 if (va >= MIPS32_KSEG1_START && va < MIPS32_KSEG1_END) {
193 a = va & MIPS_KSEG0_PHYS_MASK;
197 if (va >= vm->hdr.kernbase) {
198 pteindex = (va - vm->hdr.kernbase) >> MIPS_PAGE_SHIFT;
199 if (vm->pte_size == 64) {
200 valid = pteindex < vm->hdr.ptesize / sizeof(pte64);
201 if (pteindex >= vm->hdr.ptesize / sizeof(pte64))
203 pte64 = _mips64_pte_get(kd, pteindex);
204 valid = pte64 & MIPS_PTE_V;
206 a = MIPS64_PTE_TO_PA(pte64);
208 if (pteindex >= vm->hdr.ptesize / sizeof(pte32))
210 pte32 = _mips32_pte_get(kd, pteindex);
211 valid = pte32 & MIPS_PTE_V;
213 a = MIPS32_PTE_TO_PA(pte32);
216 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: pte "
221 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: virtual "
222 "address 0x%jx not minidumped", (uintmax_t)va);
227 ofs = _kvm_pt_find(kd, a, MIPS_PAGE_SIZE);
229 _kvm_err(kd, kd->program, "_mips_minidump_kvatop: physical "
230 "address 0x%jx not in minidump", (uintmax_t)a);
235 return (MIPS_PAGE_SIZE - offset);
239 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
245 _mips_native(kvm_t *kd)
247 _mips_native(kvm_t *kd __unused)
253 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS64)
256 if (kd->nlehdr.e_ident[EI_CLASS] != ELFCLASS32)
259 if (!(kd->nlehdr.e_flags & EF_MIPS_ABI2))
262 if (kd->nlehdr.e_flags & EF_MIPS_ABI2)
266 #if _BYTE_ORDER == _LITTLE_ENDIAN
267 return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2LSB);
269 return (kd->nlehdr.e_ident[EI_DATA] == ELFDATA2MSB);
283 _mips_iterator_init(struct mips_iter *it, kvm_t *kd)
285 struct vmstate *vm = kd->vmst;
289 if (vm->pte_size == 64)
290 it->nptes = vm->hdr.ptesize / sizeof(mips64_pte_t);
292 it->nptes = vm->hdr.ptesize / sizeof(mips32_pte_t);
297 _mips_iterator_next(struct mips_iter *it, u_long *pa, u_long *va, u_long *dva,
300 struct vmstate *vm = it->kd->vmst;
306 * mips/mips/pmap.c: init_pte_prot / pmap_protect indicate that all
307 * pages are R|X at least.
309 *prot = VM_PROT_READ | VM_PROT_EXECUTE;
313 for (;it->pteindex < it->nptes && found == 0; it->pteindex++) {
314 if (vm->pte_size == 64) {
315 pte64 = _mips64_pte_get(it->kd, it->pteindex);
316 if ((pte64 & MIPS_PTE_V) == 0)
318 if ((pte64 & MIPS64_PTE_RO) == 0)
319 *prot |= VM_PROT_WRITE;
320 *pa = MIPS64_PTE_TO_PA(pte64);
322 pte32 = _mips32_pte_get(it->kd, it->pteindex);
323 if ((pte32 & MIPS_PTE_V) == 0)
325 if ((pte32 & MIPS32_PTE_RO) == 0)
326 *prot |= VM_PROT_WRITE;
327 *pa = MIPS32_PTE_TO_PA(pte32);
329 *va = vm->hdr.kernbase + (it->pteindex << MIPS_PAGE_SHIFT);
331 /* advance pteindex regardless */
338 _mips_minidump_walk_pages(kvm_t *kd, kvm_walk_pages_cb_t *cb, void *arg)
344 /* Generate direct mapped entries; need page entries for prot etc? */
345 if (kd->nlehdr.e_ident[EI_CLASS] == ELFCLASS64) {
346 /* MIPS_XKPHYS_START..MIPS_XKPHYS_END */
347 /* MIPS64_KSEG0_START..MIPS64_KSEG0_END */
348 /* MIPS64_KSEG1_START..MIPS64_KSEG1_START */
350 /* MIPS32_KSEG0_START..MIPS32_KSEG0_END */
351 /* MIPS32_KSEG1_START..MIPS32_KSEG1_END */
354 _mips_iterator_init(&it, kd);
355 while (_mips_iterator_next(&it, &pa, &va, &dva, &prot)) {
356 if (!_kvm_visit_cb(kd, cb, arg, pa, va, dva,
357 prot, MIPS_PAGE_SIZE, 0)) {
364 static struct kvm_arch kvm_mips_minidump = {
365 .ka_probe = _mips_minidump_probe,
366 .ka_initvtop = _mips_minidump_initvtop,
367 .ka_freevtop = _mips_minidump_freevtop,
368 .ka_kvatop = _mips_minidump_kvatop,
369 .ka_native = _mips_native,
370 .ka_walk_pages = _mips_minidump_walk_pages,
373 KVM_ARCH(kvm_mips_minidump);