/* $OpenBSD: kvm_alpha.c,v 1.3 1997/02/26 16:46:29 niklas Exp $ */ /* $NetBSD: kvm_alpha.c,v 1.5 1996/10/01 21:12:05 cgd Exp $ */ /* * Copyright (c) 1994, 1995 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include <sys/param.h> #include <sys/user.h> #include <sys/proc.h> #include <sys/stat.h> #include <sys/kcore.h> #include <machine/kcore.h> #include <unistd.h> #include <nlist.h> #include <kvm.h> #include <vm/vm.h> #include <vm/vm_param.h> #include <limits.h> #include <db.h> #include "kvm_private.h" void _kvm_freevtop(kd) kvm_t *kd; { /* Not actually used for anything right now, but safe. */ if (kd->vmst != 0) free(kd->vmst); } int _kvm_initvtop(kd) kvm_t *kd; { return (0); } int _kvm_kvatop(kd, va, pa) kvm_t *kd; u_long va; u_long *pa; { cpu_kcore_hdr_t *cpu_kh; int rv, page_off; alpha_pt_entry_t pte; off_t pteoff; if (ISALIVE(kd)) { _kvm_err(kd, 0, "vatop called in live kernel!"); return(0); } cpu_kh = kd->cpu_data; page_off = va & (cpu_kh->page_size - 1); if (va >= ALPHA_K0SEG_BASE && va <= ALPHA_K0SEG_END) { /* * Direct-mapped address: just convert it. */ *pa = ALPHA_K0SEG_TO_PHYS(va); rv = cpu_kh->page_size - page_off; } else if (va >= ALPHA_K1SEG_BASE && va <= ALPHA_K1SEG_END) { /* * Real kernel virtual address: do the translation. */ /* Find and read the L1 PTE. */ pteoff = cpu_kh->lev1map_pa + kvtol1pte(va) * sizeof(alpha_pt_entry_t); if (lseek(kd->pmfd, _kvm_pa2off(kd, pteoff), 0) == -1 || read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte)) { _kvm_syserr(kd, 0, "could not read L1 PTE"); goto lose; } /* Find and read the L2 PTE. */ if ((pte & ALPHA_PTE_VALID) == 0) { _kvm_err(kd, 0, "invalid translation (invalid L1 PTE)"); goto lose; } pteoff = ALPHA_PTE_TO_PFN(pte) * cpu_kh->page_size + vatoste(va) * sizeof(alpha_pt_entry_t); if (lseek(kd->pmfd, _kvm_pa2off(kd, pteoff), 0) == -1 || read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte)) { _kvm_syserr(kd, 0, "could not read L2 PTE"); goto lose; } /* Find and read the L3 PTE. */ if ((pte & ALPHA_PTE_VALID) == 0) { _kvm_err(kd, 0, "invalid translation (invalid L2 PTE)"); goto lose; } pteoff = ALPHA_PTE_TO_PFN(pte) * cpu_kh->page_size + vatopte(va) * sizeof(alpha_pt_entry_t); if (lseek(kd->pmfd, _kvm_pa2off(kd, pteoff), 0) == -1 || read(kd->pmfd, (char *)&pte, sizeof(pte)) != sizeof(pte)) { _kvm_syserr(kd, 0, "could not read L3 PTE"); goto lose; } /* Fill in the PA. */ if ((pte & ALPHA_PTE_VALID) == 0) { _kvm_err(kd, 0, "invalid translation (invalid L3 PTE)"); goto lose; } *pa = ALPHA_PTE_TO_PFN(pte) * cpu_kh->page_size + page_off; vatopte(va) * sizeof(alpha_pt_entry_t); rv = cpu_kh->page_size - page_off; } else { /* * Bogus address (not in KV space): punt. */ _kvm_err(kd, 0, "invalid kernel virtual address"); lose: *pa = -1; rv = 0; } return (rv); } /* * Translate a physical address to a file-offset in the crash-dump. */ off_t _kvm_pa2off(kd, pa) kvm_t *kd; u_long pa; { off_t off; cpu_kcore_hdr_t *cpu_kh; cpu_kh = kd->cpu_data; off = 0; pa -= cpu_kh->core_seg.start; return (kd->dump_off + off + pa); }