/* $NetBSD: kvm_m68k_cmn.c,v 1.1 1997/03/21 18:44:24 gwr Exp $ */ /*- * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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. */ #if defined(LIBC_SCCS) && !defined(lint) #if 0 static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93"; #else static char *rcsid = "$NetBSD: kvm_m68k_cmn.c,v 1.1 1997/03/21 18:44:24 gwr Exp $"; #endif #endif /* LIBC_SCCS and not lint */ /* * Common m68k machine dependent routines for kvm. * * Note: This file has to build on ALL m68k machines, * so do NOT include any files here. */ #include #include #include #include #include #include #include /* XXX: Avoid etc. (see below) */ typedef u_int pt_entry_t; /* page table entry */ typedef u_int st_entry_t; /* segment table entry */ #include #include #include "kvm_private.h" #include "kvm_m68k.h" int _kvm_cmn_initvtop __P((kvm_t *)); void _kvm_cmn_freevtop __P((kvm_t *)); int _kvm_cmn_kvatop __P((kvm_t *, u_long, u_long *)); off_t _kvm_cmn_pa2off __P((kvm_t *, u_long)); struct kvm_ops _kvm_ops_cmn = { _kvm_cmn_initvtop, _kvm_cmn_freevtop, _kvm_cmn_kvatop, _kvm_cmn_pa2off }; static int vatop_030 __P((kvm_t *, st_entry_t *, ulong, ulong *)); static int vatop_040 __P((kvm_t *, st_entry_t *, ulong, ulong *)); /* * XXX: I don't like this, but until all arch/.../include files * are exported into some user-accessable place, there is no * convenient alternative to copying these definitions here. */ /* Things from param.h */ #define PGSHIFT 13 #define NBPG (1<<13) #define PGOFSET (NBPG-1) #define btop(x) (((unsigned)(x)) >> PGSHIFT) /* Things from pte.h */ /* All variants */ #define SG_V 2 #define PG_NV 0x00000000 #define PG_FRAME 0xffffe000 /* MC68030 with MMU TCR set for 8/11/13 (bits) */ #define SG3_SHIFT 24 /* a.k.a SEGSHIFT */ #define SG3_FRAME 0xffffe000 #define SG3_PMASK 0x00ffe000 /* MC68040 with MMU set for 8K page size. */ #define SG4_MASK1 0xfe000000 #define SG4_SHIFT1 25 #define SG4_MASK2 0x01fc0000 #define SG4_SHIFT2 18 #define SG4_MASK3 0x0003e000 #define SG4_SHIFT3 13 #define SG4_ADDR1 0xfffffe00 #define SG4_ADDR2 0xffffff80 #define KREAD(kd, addr, p)\ (kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p))) void _kvm_cmn_freevtop(kd) kvm_t *kd; { if (kd->vmst != 0) free(kd->vmst); } int _kvm_cmn_initvtop(kd) kvm_t *kd; { return (0); } int _kvm_cmn_kvatop(kd, va, pa) kvm_t *kd; u_long va; u_long *pa; { register cpu_kcore_hdr_t *cpu_kh; int (*vtopf) __P((kvm_t *, st_entry_t *, ulong, ulong *)); if (ISALIVE(kd)) { _kvm_err(kd, 0, "vatop called in live kernel!"); return (0); } cpu_kh = kd->cpu_data; switch (cpu_kh->mmutype) { case MMU_68030: vtopf = vatop_030; break; case MMU_68040: vtopf = vatop_040; break; default: _kvm_err(kd, 0, "vatop unknown MMU type!"); return (0); } return ((*vtopf)(kd, cpu_kh->sysseg_pa, va, pa)); } /* * Translate a physical address to a file-offset in the crash-dump. */ off_t _kvm_cmn_pa2off(kd, pa) kvm_t *kd; u_long pa; { off_t off; phys_ram_seg_t *rsp; register cpu_kcore_hdr_t *cpu_kh; cpu_kh = kd->cpu_data; off = 0; for (rsp = cpu_kh->ram_segs; rsp->size; rsp++) { if (pa >= rsp->start && pa < rsp->start + rsp->size) { pa -= rsp->start; break; } off += rsp->size; } return(kd->dump_off + off + pa); } /***************************************************************** * Local stuff... */ static int vatop_030(kd, sta, va, pa) kvm_t *kd; st_entry_t *sta; u_long va; u_long *pa; { register cpu_kcore_hdr_t *cpu_kh; register u_long addr; int p, ste, pte; int offset; offset = va & PGOFSET; cpu_kh = kd->cpu_data; /* * If we are initializing (kernel segment table pointer not yet set) * then return pa == va to avoid infinite recursion. */ if (cpu_kh->sysseg_pa == 0) { *pa = va + cpu_kh->kernel_pa; return (NBPG - offset); } addr = (u_long)&sta[va >> SG3_SHIFT]; /* * Can't use KREAD to read kernel segment table entries. * Fortunately it is 1-to-1 mapped so we don't have to. */ if (sta == cpu_kh->sysseg_pa) { if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0) goto invalid; } else if (KREAD(kd, addr, &ste)) goto invalid; if ((ste & SG_V) == 0) { _kvm_err(kd, 0, "invalid segment (%x)", ste); return((off_t)0); } p = btop(va & SG3_PMASK); addr = (ste & SG3_FRAME) + (p * sizeof(pt_entry_t)); /* * Address from STE is a physical address so don't use kvm_read. */ if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0) goto invalid; addr = pte & PG_FRAME; if (pte == PG_NV) { _kvm_err(kd, 0, "page not valid"); return (0); } *pa = addr + offset; return (NBPG - offset); invalid: _kvm_err(kd, 0, "invalid address (%x)", va); return (0); } static int vatop_040(kd, sta, va, pa) kvm_t *kd; st_entry_t *sta; u_long va; u_long *pa; { register cpu_kcore_hdr_t *cpu_kh; register u_long addr; st_entry_t *sta2; int p, ste, pte; int offset; offset = va & PGOFSET; cpu_kh = kd->cpu_data; /* * If we are initializing (kernel segment table pointer not yet set) * then return pa == va to avoid infinite recursion. */ if (cpu_kh->sysseg_pa == 0) { *pa = va + cpu_kh->kernel_pa; return (NBPG - offset); } addr = (u_long)&sta[va >> SG4_SHIFT1]; /* * Can't use KREAD to read kernel segment table entries. * Fortunately it is 1-to-1 mapped so we don't have to. */ if (sta == cpu_kh->sysseg_pa) { if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0) goto invalid; } else if (KREAD(kd, addr, &ste)) goto invalid; if ((ste & SG_V) == 0) { _kvm_err(kd, 0, "invalid level 1 descriptor (%x)", ste); return((off_t)0); } sta2 = (st_entry_t *)(ste & SG4_ADDR1); addr = (u_long)&sta2[(va & SG4_MASK2) >> SG4_SHIFT2]; /* * Address from level 1 STE is a physical address, * so don't use kvm_read. */ if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0) goto invalid; if ((ste & SG_V) == 0) { _kvm_err(kd, 0, "invalid level 2 descriptor (%x)", ste); return((off_t)0); } sta2 = (st_entry_t *)(ste & SG4_ADDR2); addr = (u_long)&sta2[(va & SG4_MASK3) >> SG4_SHIFT3]; /* * Address from STE is a physical address so don't use kvm_read. */ if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 || read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0) goto invalid; addr = pte & PG_FRAME; if (pte == PG_NV) { _kvm_err(kd, 0, "page not valid"); return (0); } *pa = addr + offset; return (NBPG - offset); invalid: _kvm_err(kd, 0, "invalid address (%x)", va); return (0); }