8a16b7a18f
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245 lines
6.3 KiB
C
245 lines
6.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software developed by the Computer Systems
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* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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* BG 91-66 and contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: FreeBSD: src/lib/libkvm/kvm_i386.c,v 1.15 2001/10/10 17:48:43
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* sparc64 machine dependent routines for kvm.
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*/
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#include <sys/param.h>
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#include <kvm.h>
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#include <limits.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "../../sys/sparc64/include/kerneldump.h"
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#include "kvm_private.h"
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#include "kvm_sparc64.h"
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struct vmstate {
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off_t vm_tsb_off;
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uint64_t vm_tsb_mask;
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int vm_nregions;
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struct sparc64_dump_reg *vm_regions;
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};
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static int
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_sparc64_probe(kvm_t *kd)
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{
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return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_SPARCV9));
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}
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static void
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_sparc64_freevtop(kvm_t *kd)
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{
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free(kd->vmst->vm_regions);
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free(kd->vmst);
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kd->vmst = NULL;
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}
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static int
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_sparc64_read_phys(kvm_t *kd, off_t pos, void *buf, size_t size)
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{
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/* XXX This has to be a raw file read, kvm_read is virtual. */
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if (pread(kd->pmfd, buf, size, pos) != (ssize_t)size) {
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_kvm_syserr(kd, kd->program, "_sparc64_read_phys: pread");
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return (0);
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}
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return (1);
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}
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static int
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_sparc64_reg_cmp(const void *a, const void *b)
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{
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const struct sparc64_dump_reg *ra, *rb;
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ra = a;
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rb = b;
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if (ra->dr_pa < rb->dr_pa)
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return (-1);
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else if (ra->dr_pa >= rb->dr_pa + rb->dr_size)
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return (1);
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else
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return (0);
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}
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#define KVM_OFF_NOTFOUND 0
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static off_t
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_sparc64_find_off(struct vmstate *vm, uint64_t pa, uint64_t size)
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{
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struct sparc64_dump_reg *reg, key;
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vm_offset_t o;
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key.dr_pa = pa;
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reg = bsearch(&key, vm->vm_regions, vm->vm_nregions,
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sizeof(*vm->vm_regions), _sparc64_reg_cmp);
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if (reg == NULL)
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return (KVM_OFF_NOTFOUND);
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o = pa - reg->dr_pa;
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if (o + size > reg->dr_size)
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return (KVM_OFF_NOTFOUND);
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return (reg->dr_offs + o);
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}
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static int
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_sparc64_initvtop(kvm_t *kd)
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{
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struct sparc64_dump_hdr hdr;
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struct sparc64_dump_reg *regs;
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struct vmstate *vm;
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size_t regsz;
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int i;
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vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
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if (vm == NULL) {
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_kvm_err(kd, kd->program, "cannot allocate vm");
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return (-1);
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}
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kd->vmst = vm;
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if (!_sparc64_read_phys(kd, 0, &hdr, sizeof(hdr)))
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goto fail_vm;
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hdr.dh_hdr_size = be64toh(hdr.dh_hdr_size);
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hdr.dh_tsb_pa = be64toh(hdr.dh_tsb_pa);
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hdr.dh_tsb_size = be64toh(hdr.dh_tsb_size);
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hdr.dh_tsb_mask = be64toh(hdr.dh_tsb_mask);
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hdr.dh_nregions = be32toh(hdr.dh_nregions);
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regsz = hdr.dh_nregions * sizeof(*regs);
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regs = _kvm_malloc(kd, regsz);
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if (regs == NULL) {
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_kvm_err(kd, kd->program, "cannot allocate regions");
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goto fail_vm;
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}
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if (!_sparc64_read_phys(kd, sizeof(hdr), regs, regsz))
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goto fail_regs;
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for (i = 0; i < hdr.dh_nregions; i++) {
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regs[i].dr_pa = be64toh(regs[i].dr_pa);
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regs[i].dr_size = be64toh(regs[i].dr_size);
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regs[i].dr_offs = be64toh(regs[i].dr_offs);
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}
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qsort(regs, hdr.dh_nregions, sizeof(*regs), _sparc64_reg_cmp);
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vm->vm_tsb_mask = hdr.dh_tsb_mask;
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vm->vm_regions = regs;
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vm->vm_nregions = hdr.dh_nregions;
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vm->vm_tsb_off = _sparc64_find_off(vm, hdr.dh_tsb_pa, hdr.dh_tsb_size);
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if (vm->vm_tsb_off == KVM_OFF_NOTFOUND) {
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_kvm_err(kd, kd->program, "tsb not found in dump");
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goto fail_regs;
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}
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return (0);
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fail_regs:
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free(regs);
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fail_vm:
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free(vm);
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return (-1);
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}
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static int
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_sparc64_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
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{
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struct sparc64_tte tte;
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off_t tte_off;
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kvaddr_t vpn;
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off_t pa_off;
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kvaddr_t pg_off;
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int rest;
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pg_off = va & SPARC64_PAGE_MASK;
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if (va >= SPARC64_MIN_DIRECT_ADDRESS)
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pa_off = SPARC64_DIRECT_TO_PHYS(va) & ~SPARC64_PAGE_MASK;
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else {
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vpn = va >> SPARC64_PAGE_SHIFT;
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tte_off = kd->vmst->vm_tsb_off +
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((vpn & kd->vmst->vm_tsb_mask) << SPARC64_TTE_SHIFT);
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if (!_sparc64_read_phys(kd, tte_off, &tte, sizeof(tte)))
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goto invalid;
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tte.tte_vpn = be64toh(tte.tte_vpn);
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tte.tte_data = be64toh(tte.tte_data);
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if (!sparc64_tte_match(&tte, va))
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goto invalid;
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pa_off = SPARC64_TTE_GET_PA(&tte);
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}
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rest = SPARC64_PAGE_SIZE - pg_off;
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pa_off = _sparc64_find_off(kd->vmst, pa_off, rest);
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if (pa_off == KVM_OFF_NOTFOUND)
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goto invalid;
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*pa = pa_off + pg_off;
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return (rest);
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invalid:
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_kvm_err(kd, 0, "invalid address (%jx)", (uintmax_t)va);
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return (0);
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}
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static int
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_sparc64_native(kvm_t *kd __unused)
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{
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#ifdef __sparc64__
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return (1);
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#else
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return (0);
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#endif
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}
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static struct kvm_arch kvm_sparc64 = {
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.ka_probe = _sparc64_probe,
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.ka_initvtop = _sparc64_initvtop,
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.ka_freevtop = _sparc64_freevtop,
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.ka_kvatop = _sparc64_kvatop,
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.ka_native = _sparc64_native,
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};
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KVM_ARCH(kvm_sparc64);
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