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/* $OpenBSD: kvm_sparc64.c,v 1.8 2012/12/05 23:20:02 deraadt Exp $ */
/* $NetBSD: kvm_sparc64.c,v 1.7 2001/08/05 03:33:15 matt Exp $ */
/*-
* Copyright (c) 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.
* 3. 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.
*/
/*
* Sparc machine dependent routines for kvm. Hopefully, the forthcoming
* vm code will one day obsolete this module.
*/
#include <sys/param.h>
#include <sys/exec.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/core.h>
#include <sys/kcore.h>
#include <unistd.h>
#include <nlist.h>
#include <kvm.h>
#include <uvm/uvm_extern.h>
#include <machine/vmparam.h>
#include <machine/pmap.h>
#include <machine/kcore.h>
#include <limits.h>
#include <db.h>
#include "kvm_private.h"
/*
* UltraSPARC T1 & T2 implement only a 40-bit real address range, just
* like older UltraSPARC CPUs.
*/
#define TLB_PA_MASK SUN4U_TLB_PA_MASK
int _kvm_kvatop(kvm_t *, u_long, u_long *);
void
_kvm_freevtop(kvm_t *kd)
{
if (kd->vmst != NULL) {
_kvm_err(kd, kd->program, "_kvm_freevtop: internal error");
kd->vmst = NULL;
}
}
/*
* Prepare for translation of kernel virtual addresses into offsets
* into crash dump files. We use the MMU specific goop written at the
* front of the crash dump by pmap_dumpmmu().
*
* We should read in and cache the ksegs here to speed up operations...
*/
int
_kvm_initvtop(kvm_t *kd)
{
kd->nbpg = 0x2000;
return (0);
}
/*
* Translate a kernel virtual address to a physical address using the
* mapping information in kd->vm. Returns the result in pa, and returns
* the number of bytes that are contiguously available from this
* physical address. This routine is used only for crashdumps.
*/
int
_kvm_kvatop(kvm_t *kd, u_long va, paddr_t *pa)
{
cpu_kcore_hdr_t *cpup = kd->cpu_data;
u_long kernbase = cpup->kernbase;
uint64_t *pseg, *pdir, *ptbl;
int64_t data;
if (va < kernbase)
goto lose;
/* Handle the wired 4MB TTEs */
if (va > cpup->ktextbase && va < (cpup->ktextbase + cpup->ktextsz)) {
u_long vaddr;
vaddr = va - cpup->ktextbase;
*pa = cpup->ktextp + vaddr;
return (cpup->ktextsz - vaddr);
}
if (va > cpup->kdatabase && va < (cpup->kdatabase + cpup->kdatasz)) {
u_long vaddr;
vaddr = va - cpup->kdatabase;
*pa = cpup->kdatap + vaddr;
return (cpup->kdatasz - vaddr);
}
/*
* Parse kernel page table.
*/
pseg = (uint64_t *)(u_long)cpup->segmapoffset;
if (pread(kd->pmfd, &pdir, sizeof(pdir),
_kvm_pa2off(kd, (u_long)&pseg[va_to_seg(va)])) != sizeof(pdir)) {
_kvm_syserr(kd, 0, "could not read L1 PTE");
goto lose;
}
if (!pdir) {
_kvm_err(kd, 0, "invalid L1 PTE");
goto lose;
}
if (pread(kd->pmfd, &ptbl, sizeof(ptbl),
_kvm_pa2off(kd, (u_long)&pdir[va_to_dir(va)])) != sizeof(ptbl)) {
_kvm_syserr(kd, 0, "could not read L2 PTE");
goto lose;
}
if (!ptbl) {
_kvm_err(kd, 0, "invalid L2 PTE");
goto lose;
}
if (pread(kd->pmfd, &data, sizeof(data),
_kvm_pa2off(kd, (u_long)&ptbl[va_to_pte(va)])) != sizeof(data)) {
_kvm_syserr(kd, 0, "could not read TTE");
goto lose;
}
if (data >= 0) {
_kvm_err(kd, 0, "invalid L2 TTE");
goto lose;
}
/*
* Calculate page offsets and things.
*
* XXXX -- We could support multiple page sizes.
*/
va = va & (kd->nbpg - 1);
data &= TLB_PA_MASK;
*pa = data + va;
/*
* Parse and translate our TTE.
*/
return (kd->nbpg - va);
lose:
*pa = -1;
_kvm_err(kd, 0, "invalid address (%lx)", va);
return (0);
}
/*
* Translate a physical address to a file-offset in the crash-dump.
*/
off_t
_kvm_pa2off(kvm_t *kd, paddr_t pa)
{
cpu_kcore_hdr_t *cpup = kd->cpu_data;
phys_ram_seg_t *mp;
off_t off;
int nmem;
/*
* Layout of CPU segment:
* cpu_kcore_hdr_t;
* [alignment]
* phys_ram_seg_t[cpup->nmemseg];
*/
mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset);
off = 0;
/* Translate (sparse) pfnum to (packed) dump offset */
for (nmem = cpup->nmemseg; --nmem >= 0; mp++) {
if (mp->start <= pa && pa < mp->start + mp->size)
break;
off += mp->size;
}
if (nmem < 0) {
_kvm_err(kd, 0, "invalid address (%lx)", pa);
return (-1);
}
return (kd->dump_off + off + pa - mp->start);
}
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