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kvm_alpha.c revision 1.4 
      1 /*	$NetBSD: kvm_alpha.c,v 1.4 1996/10/01 19:04:02 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994, 1995 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <sys/param.h>
     31 #include <sys/user.h>
     32 #include <sys/proc.h>
     33 #include <sys/stat.h>
     34 #include <sys/kcore.h>
     35 #include <machine/kcore.h>
     36 #include <unistd.h>
     37 #include <nlist.h>
     38 #include <kvm.h>
     39 
     40 #include <vm/vm.h>
     41 #include <vm/vm_param.h>
     42 
     43 #include <limits.h>
     44 #include <db.h>
     45 
     46 #include "kvm_private.h"
     47 
     48 void
     49 _kvm_freevtop(kd)
     50 	kvm_t *kd;
     51 {
     52 
     53 }
     54 
     55 int
     56 _kvm_initvtop(kd)
     57 	kvm_t *kd;
     58 {
     59 
     60 	return (0);
     61 }
     62 
     63 int
     64 _kvm_kvatop(kd, va, pa)
     65 	kvm_t *kd;
     66 	u_long va;
     67 	u_long *pa;
     68 {
     69 	cpu_kcore_hdr_t *cpu_kh;
     70 	int rv, page_off;
     71 
     72         if (ISALIVE(kd)) {
     73                 _kvm_err(kd, 0, "vatop called in live kernel!");
     74                 return(0);
     75         }
     76 
     77 	cpu_kh = kd->cpu_data;
     78 	page_off = va & (cpu_kh->page_size - 1);
     79 
     80 	if (va >= ALPHA_K0SEG_BASE && va <= ALPHA_K0SEG_END) {
     81 		/*
     82 		 * Direct-mapped address.  Just convert it.
     83 		 */
     84 		*pa = ALPHA_K0SEG_TO_PHYS(va);
     85 		rv = cpu_kh->page_size - page_off;
     86 	} else if (va >= ALPHA_K1SEG_BASE && va <= ALPHA_K1SEG_END) {
     87 		/*
     88 		 * Real kernel virtual address.  Do the translation.
     89 		 */
     90 		/* XXX TRANSLATE IT! */
     91 		goto barf; /* XXX */
     92 	} else {
     93 		/*
     94 		 * The address is from space (not a KV address).  Return
     95 		 * values that indicate that it can't be used.
     96 		 */
     97 barf: /* XXX */
     98 		*pa = -1;
     99 		rv = 0;
    100 	}
    101 
    102 /* printf("_kvm_kvatop va = 0x%lx, returning pa = 0x%lx, rv = 0x%lx\n", va, *pa, rv); */
    103 	return (rv);
    104 }
    105 
    106 /*
    107  * Translate a physical address to a file-offset in the crash-dump.
    108  */
    109 off_t
    110 _kvm_pa2off(kd, pa)
    111 	kvm_t *kd;
    112 	u_long pa;
    113 {
    114 	off_t off;
    115 	cpu_kcore_hdr_t *cpu_kh;
    116 
    117 	cpu_kh = kd->cpu_data;
    118 
    119 	off = 0;
    120 	pa -= cpu_kh->core_seg.start;
    121 
    122 	return (kd->dump_off + off + pa);
    123 }
    124