freebsd-skq/lib/libkvm/kvm_sparc64.c

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/*-
* Copyright (c) 1989, 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software developed by the Computer Systems
* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
* BG 91-66 and contributed to Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: FreeBSD: src/lib/libkvm/kvm_i386.c,v 1.15 2001/10/10 17:48:43
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
#endif
#endif /* LIBC_SCCS and not lint */
/*
* sparc64 machine dependent routines for kvm.
*/
#include <sys/param.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <unistd.h>
#include <nlist.h>
#include <kvm.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <machine/kerneldump.h>
#include <machine/tte.h>
#include <machine/tlb.h>
#include <machine/tsb.h>
#include <limits.h>
#include "kvm_private.h"
#ifndef btop
#define btop(x) (sparc64_btop(x))
#define ptob(x) (sparc64_ptob(x))
#endif
struct vmstate {
off_t vm_tsb_off;
vm_size_t vm_tsb_mask;
int vm_nregions;
struct sparc64_dump_reg *vm_regions;
};
void
_kvm_freevtop(kvm_t *kd)
{
if (kd->vmst != 0) {
free(kd->vmst->vm_regions);
free(kd->vmst);
}
}
static int
_kvm_read_phys(kvm_t *kd, off_t pos, void *buf, size_t size)
{
/* XXX This has to be a raw file read, kvm_read is virtual. */
if (lseek(kd->pmfd, pos, SEEK_SET) == -1) {
_kvm_syserr(kd, kd->program, "_kvm_read_phys: lseek");
return (0);
}
if (read(kd->pmfd, buf, size) != (ssize_t)size) {
_kvm_syserr(kd, kd->program, "_kvm_read_phys: read");
return (0);
}
return (1);
}
static int
_kvm_reg_cmp(const void *a, const void *b)
{
const struct sparc64_dump_reg *ra, *rb;
ra = a;
rb = b;
if (ra->dr_pa < rb->dr_pa)
return (-1);
else if (ra->dr_pa >= rb->dr_pa + rb->dr_size)
return (1);
else
return (0);
}
#define KVM_OFF_NOTFOUND 0
static off_t
_kvm_find_off(struct vmstate *vm, vm_offset_t pa, vm_size_t size)
{
struct sparc64_dump_reg *reg, key;
vm_offset_t o;
key.dr_pa = pa;
reg = bsearch(&key, vm->vm_regions, vm->vm_nregions,
sizeof(*vm->vm_regions), _kvm_reg_cmp);
if (reg == NULL)
return (KVM_OFF_NOTFOUND);
o = pa - reg->dr_pa;
if (o + size > reg->dr_size)
return (KVM_OFF_NOTFOUND);
return (reg->dr_offs + o);
}
int
_kvm_initvtop(kvm_t *kd)
{
struct sparc64_dump_hdr hdr;
struct sparc64_dump_reg *regs;
struct vmstate *vm;
size_t regsz;
vm_offset_t pa;
vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
if (vm == NULL) {
_kvm_err(kd, kd->program, "cannot allocate vm");
return (-1);
}
kd->vmst = vm;
if (!_kvm_read_phys(kd, 0, &hdr, sizeof(hdr)))
goto fail_vm;
pa = hdr.dh_tsb_pa;
regsz = hdr.dh_nregions * sizeof(*regs);
regs = _kvm_malloc(kd, regsz);
if (regs == NULL) {
_kvm_err(kd, kd->program, "cannot allocate regions");
goto fail_vm;
}
if (!_kvm_read_phys(kd, sizeof(hdr), regs, regsz))
goto fail_regs;
qsort(regs, hdr.dh_nregions, sizeof(*regs), _kvm_reg_cmp);
vm->vm_tsb_mask = hdr.dh_tsb_mask;
vm->vm_regions = regs;
vm->vm_nregions = hdr.dh_nregions;
vm->vm_tsb_off = _kvm_find_off(vm, hdr.dh_tsb_pa, hdr.dh_tsb_size);
if (vm->vm_tsb_off == KVM_OFF_NOTFOUND) {
_kvm_err(kd, kd->program, "tsb not found in dump");
goto fail_regs;
}
return (0);
fail_regs:
free(regs);
fail_vm:
free(vm);
return (-1);
}
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int
_kvm_kvatop(kvm_t *kd, u_long va, off_t *pa)
{
2001-12-29 06:43:36 +00:00
struct tte tte;
off_t tte_off;
u_long vpn;
off_t pa_off;
u_long pg_off;
int rest;
pg_off = va & PAGE_MASK;
if (va >= VM_MIN_DIRECT_ADDRESS)
pa_off = TLB_DIRECT_TO_PHYS(va) & ~PAGE_MASK;
else {
vpn = btop(va);
tte_off = kd->vmst->vm_tsb_off +
((vpn & kd->vmst->vm_tsb_mask) << TTE_SHIFT);
if (!_kvm_read_phys(kd, tte_off, &tte, sizeof(tte)))
goto invalid;
if (!tte_match(&tte, va))
goto invalid;
pa_off = TTE_GET_PA(&tte);
}
rest = PAGE_SIZE - pg_off;
pa_off = _kvm_find_off(kd->vmst, pa_off, rest);
if (pa_off == KVM_OFF_NOTFOUND)
goto invalid;
*pa = pa_off + pg_off;
return (rest);
invalid:
_kvm_err(kd, 0, "invalid address (%lx)", va);
return (0);
}