kvm_sparc64.c revision 303975
1252190Srpaulo/*- 2252190Srpaulo * Copyright (c) 1989, 1992, 1993 3252190Srpaulo * The Regents of the University of California. All rights reserved. 4252190Srpaulo * 5252190Srpaulo * This code is derived from software developed by the Computer Systems 6252190Srpaulo * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 7252190Srpaulo * BG 91-66 and contributed to Berkeley. 8252190Srpaulo * 9252190Srpaulo * Redistribution and use in source and binary forms, with or without 10252190Srpaulo * modification, are permitted provided that the following conditions 11252190Srpaulo * are met: 12252190Srpaulo * 1. Redistributions of source code must retain the above copyright 13252190Srpaulo * notice, this list of conditions and the following disclaimer. 14252190Srpaulo * 2. Redistributions in binary form must reproduce the above copyright 15252190Srpaulo * notice, this list of conditions and the following disclaimer in the 16252190Srpaulo * documentation and/or other materials provided with the distribution. 17252190Srpaulo * 4. Neither the name of the University nor the names of its contributors 18252190Srpaulo * may be used to endorse or promote products derived from this software 19252190Srpaulo * without specific prior written permission. 20252190Srpaulo * 21252190Srpaulo * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22252190Srpaulo * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23252190Srpaulo * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24252190Srpaulo * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25252190Srpaulo * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26252190Srpaulo * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27252190Srpaulo * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28252190Srpaulo * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29252190Srpaulo * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30252190Srpaulo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31252190Srpaulo * SUCH DAMAGE. 32252190Srpaulo * 33252190Srpaulo * from: FreeBSD: src/lib/libkvm/kvm_i386.c,v 1.15 2001/10/10 17:48:43 34252190Srpaulo */ 35252190Srpaulo 36252190Srpaulo#include <sys/cdefs.h> 37252190Srpaulo__FBSDID("$FreeBSD: releng/11.0/lib/libkvm/kvm_sparc64.c 298841 2016-04-30 09:31:01Z ngie $"); 38252190Srpaulo 39252190Srpaulo#if defined(LIBC_SCCS) && !defined(lint) 40252190Srpaulo#if 0 41252190Srpaulostatic char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93"; 42252190Srpaulo#endif 43252190Srpaulo#endif /* LIBC_SCCS and not lint */ 44252190Srpaulo 45252190Srpaulo/* 46252190Srpaulo * sparc64 machine dependent routines for kvm. 47252190Srpaulo */ 48252190Srpaulo 49252190Srpaulo#include <sys/param.h> 50252190Srpaulo#include <kvm.h> 51252190Srpaulo#include <limits.h> 52252190Srpaulo#include <stdint.h> 53252190Srpaulo#include <stdlib.h> 54252190Srpaulo#include <unistd.h> 55252190Srpaulo 56252190Srpaulo#include "../../sys/sparc64/include/kerneldump.h" 57252190Srpaulo 58252190Srpaulo#include "kvm_private.h" 59252190Srpaulo#include "kvm_sparc64.h" 60252190Srpaulo 61252190Srpaulostruct vmstate { 62252190Srpaulo off_t vm_tsb_off; 63252190Srpaulo uint64_t vm_tsb_mask; 64252190Srpaulo int vm_nregions; 65252190Srpaulo struct sparc64_dump_reg *vm_regions; 66252190Srpaulo}; 67252190Srpaulo 68252190Srpaulostatic int 69252190Srpaulo_sparc64_probe(kvm_t *kd) 70252190Srpaulo{ 71252190Srpaulo 72252190Srpaulo return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_SPARCV9)); 73252190Srpaulo} 74252190Srpaulo 75252190Srpaulostatic void 76252190Srpaulo_sparc64_freevtop(kvm_t *kd) 77252190Srpaulo{ 78252190Srpaulo 79252190Srpaulo free(kd->vmst->vm_regions); 80252190Srpaulo free(kd->vmst); 81252190Srpaulo kd->vmst = NULL; 82252190Srpaulo} 83252190Srpaulo 84252190Srpaulostatic int 85252190Srpaulo_sparc64_read_phys(kvm_t *kd, off_t pos, void *buf, size_t size) 86252190Srpaulo{ 87252190Srpaulo 88252190Srpaulo /* XXX This has to be a raw file read, kvm_read is virtual. */ 89252190Srpaulo if (pread(kd->pmfd, buf, size, pos) != (ssize_t)size) { 90252190Srpaulo _kvm_syserr(kd, kd->program, "_sparc64_read_phys: pread"); 91252190Srpaulo return (0); 92252190Srpaulo } 93252190Srpaulo return (1); 94252190Srpaulo} 95252190Srpaulo 96252190Srpaulostatic int 97252190Srpaulo_sparc64_reg_cmp(const void *a, const void *b) 98252190Srpaulo{ 99252190Srpaulo const struct sparc64_dump_reg *ra, *rb; 100252190Srpaulo 101252190Srpaulo ra = a; 102252190Srpaulo rb = b; 103252190Srpaulo if (ra->dr_pa < rb->dr_pa) 104252190Srpaulo return (-1); 105252190Srpaulo else if (ra->dr_pa >= rb->dr_pa + rb->dr_size) 106252190Srpaulo return (1); 107252190Srpaulo else 108252190Srpaulo return (0); 109252190Srpaulo} 110252190Srpaulo 111252190Srpaulo#define KVM_OFF_NOTFOUND 0 112252190Srpaulo 113252190Srpaulostatic off_t 114252190Srpaulo_sparc64_find_off(struct vmstate *vm, uint64_t pa, uint64_t size) 115252190Srpaulo{ 116252190Srpaulo struct sparc64_dump_reg *reg, key; 117252190Srpaulo vm_offset_t o; 118252190Srpaulo 119252190Srpaulo key.dr_pa = pa; 120252190Srpaulo reg = bsearch(&key, vm->vm_regions, vm->vm_nregions, 121252190Srpaulo sizeof(*vm->vm_regions), _sparc64_reg_cmp); 122252190Srpaulo if (reg == NULL) 123252190Srpaulo return (KVM_OFF_NOTFOUND); 124252190Srpaulo o = pa - reg->dr_pa; 125252190Srpaulo if (o + size > reg->dr_size) 126252190Srpaulo return (KVM_OFF_NOTFOUND); 127252190Srpaulo return (reg->dr_offs + o); 128252190Srpaulo} 129252190Srpaulo 130252190Srpaulostatic int 131252190Srpaulo_sparc64_initvtop(kvm_t *kd) 132252190Srpaulo{ 133252190Srpaulo struct sparc64_dump_hdr hdr; 134252190Srpaulo struct sparc64_dump_reg *regs; 135252190Srpaulo struct vmstate *vm; 136252190Srpaulo size_t regsz; 137252190Srpaulo int i; 138252190Srpaulo 139252190Srpaulo vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); 140252190Srpaulo if (vm == NULL) { 141252190Srpaulo _kvm_err(kd, kd->program, "cannot allocate vm"); 142252190Srpaulo return (-1); 143252190Srpaulo } 144252190Srpaulo kd->vmst = vm; 145252190Srpaulo 146252190Srpaulo if (!_sparc64_read_phys(kd, 0, &hdr, sizeof(hdr))) 147252190Srpaulo goto fail_vm; 148252190Srpaulo hdr.dh_hdr_size = be64toh(hdr.dh_hdr_size); 149252190Srpaulo hdr.dh_tsb_pa = be64toh(hdr.dh_tsb_pa); 150252190Srpaulo hdr.dh_tsb_size = be64toh(hdr.dh_tsb_size); 151252190Srpaulo hdr.dh_tsb_mask = be64toh(hdr.dh_tsb_mask); 152252190Srpaulo hdr.dh_nregions = be32toh(hdr.dh_nregions); 153252190Srpaulo 154252190Srpaulo regsz = hdr.dh_nregions * sizeof(*regs); 155252190Srpaulo regs = _kvm_malloc(kd, regsz); 156252190Srpaulo if (regs == NULL) { 157252190Srpaulo _kvm_err(kd, kd->program, "cannot allocate regions"); 158252190Srpaulo goto fail_vm; 159252190Srpaulo } 160252190Srpaulo if (!_sparc64_read_phys(kd, sizeof(hdr), regs, regsz)) 161252190Srpaulo goto fail_regs; 162252190Srpaulo for (i = 0; i < hdr.dh_nregions; i++) { 163252190Srpaulo regs[i].dr_pa = be64toh(regs[i].dr_pa); 164252190Srpaulo regs[i].dr_size = be64toh(regs[i].dr_size); 165252190Srpaulo regs[i].dr_offs = be64toh(regs[i].dr_offs); 166252190Srpaulo } 167252190Srpaulo qsort(regs, hdr.dh_nregions, sizeof(*regs), _sparc64_reg_cmp); 168252190Srpaulo 169252190Srpaulo vm->vm_tsb_mask = hdr.dh_tsb_mask; 170252190Srpaulo vm->vm_regions = regs; 171252190Srpaulo vm->vm_nregions = hdr.dh_nregions; 172252190Srpaulo vm->vm_tsb_off = _sparc64_find_off(vm, hdr.dh_tsb_pa, hdr.dh_tsb_size); 173252190Srpaulo if (vm->vm_tsb_off == KVM_OFF_NOTFOUND) { 174252190Srpaulo _kvm_err(kd, kd->program, "tsb not found in dump"); 175252190Srpaulo goto fail_regs; 176252190Srpaulo } 177252190Srpaulo return (0); 178252190Srpaulo 179252190Srpaulofail_regs: 180252190Srpaulo free(regs); 181252190Srpaulofail_vm: 182252190Srpaulo free(vm); 183252190Srpaulo return (-1); 184252190Srpaulo} 185252190Srpaulo 186252190Srpaulostatic int 187252190Srpaulo_sparc64_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa) 188252190Srpaulo{ 189252190Srpaulo struct sparc64_tte tte; 190252190Srpaulo off_t tte_off; 191252190Srpaulo kvaddr_t vpn; 192252190Srpaulo off_t pa_off; 193252190Srpaulo kvaddr_t pg_off; 194252190Srpaulo int rest; 195252190Srpaulo 196252190Srpaulo pg_off = va & SPARC64_PAGE_MASK; 197252190Srpaulo if (va >= SPARC64_MIN_DIRECT_ADDRESS) 198252190Srpaulo pa_off = SPARC64_DIRECT_TO_PHYS(va) & ~SPARC64_PAGE_MASK; 199252190Srpaulo else { 200252190Srpaulo vpn = va >> SPARC64_PAGE_SHIFT; 201252190Srpaulo tte_off = kd->vmst->vm_tsb_off + 202252190Srpaulo ((vpn & kd->vmst->vm_tsb_mask) << SPARC64_TTE_SHIFT); 203252190Srpaulo if (!_sparc64_read_phys(kd, tte_off, &tte, sizeof(tte))) 204252190Srpaulo goto invalid; 205252190Srpaulo tte.tte_vpn = be64toh(tte.tte_vpn); 206252190Srpaulo tte.tte_data = be64toh(tte.tte_data); 207252190Srpaulo if (!sparc64_tte_match(&tte, va)) 208252190Srpaulo goto invalid; 209252190Srpaulo pa_off = SPARC64_TTE_GET_PA(&tte); 210252190Srpaulo } 211252190Srpaulo rest = SPARC64_PAGE_SIZE - pg_off; 212252190Srpaulo pa_off = _sparc64_find_off(kd->vmst, pa_off, rest); 213252190Srpaulo if (pa_off == KVM_OFF_NOTFOUND) 214252190Srpaulo goto invalid; 215252190Srpaulo *pa = pa_off + pg_off; 216252190Srpaulo return (rest); 217252190Srpaulo 218252190Srpauloinvalid: 219252190Srpaulo _kvm_err(kd, 0, "invalid address (%jx)", (uintmax_t)va); 220252190Srpaulo return (0); 221252190Srpaulo} 222252190Srpaulo 223252190Srpaulostatic int 224252190Srpaulo_sparc64_native(kvm_t *kd) 225252190Srpaulo{ 226252190Srpaulo 227252190Srpaulo#ifdef __sparc64__ 228252190Srpaulo return (1); 229252190Srpaulo#else 230252190Srpaulo return (0); 231252190Srpaulo#endif 232252190Srpaulo} 233252190Srpaulo 234252190Srpaulostruct kvm_arch kvm_sparc64 = { 235252190Srpaulo .ka_probe = _sparc64_probe, 236252190Srpaulo .ka_initvtop = _sparc64_initvtop, 237252190Srpaulo .ka_freevtop = _sparc64_freevtop, 238252190Srpaulo .ka_kvatop = _sparc64_kvatop, 239252190Srpaulo .ka_native = _sparc64_native, 240252190Srpaulo}; 241252190Srpaulo 242252190SrpauloKVM_ARCH(kvm_sparc64); 243252190Srpaulo