/* $OpenBSD: kvm_sparc64.c,v 1.14 2024/04/11 18:58:44 miod 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/types.h> #include <sys/signal.h> #include <sys/exec.h> #include <sys/proc.h> #include <sys/stat.h> #include <sys/kcore.h> #include <unistd.h> #include <nlist.h> #include <kvm.h> #include <uvm/uvm_extern.h> #include <machine/param.h> #include <machine/vmparam.h> #include <machine/pte.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) { 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); }
