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      1 /*	$NetBSD: kvm_riscv.c,v 1.4 2024/10/12 12:19:16 skrll Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * OR1K machine dependent routines for kvm.
     34  */
     35 
     36 #include <sys/param.h>
     37 #include <sys/exec.h>
     38 #include <sys/types.h>
     39 
     40 #include <uvm/uvm_extern.h>
     41 
     42 #include <db.h>
     43 #include <limits.h>
     44 #include <kvm.h>
     45 #include <stdlib.h>
     46 #include <unistd.h>
     47 
     48 #include "kvm_private.h"
     49 
     50 #include <sys/kcore.h>
     51 #include <machine/kcore.h>
     52 #include <machine/vmparam.h>
     53 
     54 __RCSID("$NetBSD: kvm_riscv.c,v 1.4 2024/10/12 12:19:16 skrll Exp $");
     55 
     56 void
     57 _kvm_freevtop(kvm_t *kd)
     58 {
     59 	if (kd->vmst != 0)
     60 		free(kd->vmst);
     61 }
     62 
     63 /*ARGSUSED*/
     64 int
     65 _kvm_initvtop(kvm_t *kd)
     66 {
     67 
     68 	return 0;
     69 }
     70 
     71 /*
     72  * Translate a KVA to a PA
     73  */
     74 int
     75 _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
     76 {
     77 //	cpu_kcore_hdr_t	*cpu_kh;
     78 
     79 	if (ISALIVE(kd)) {
     80 		_kvm_err(kd, 0, "vatop called in live kernel!");
     81 		return 0;
     82 	}
     83 
     84 	/* No hit -- no translation */
     85 	*pa = ~0UL;
     86 	return 0;
     87 }
     88 
     89 off_t
     90 _kvm_pa2off(kvm_t *kd, paddr_t pa)
     91 {
     92 	cpu_kcore_hdr_t	*cpu_kh;
     93 	phys_ram_seg_t	*ram;
     94 	off_t		off;
     95 	void		*e;
     96 
     97 	cpu_kh = kd->cpu_data;
     98 	e = (char *) kd->cpu_data + kd->cpu_dsize;
     99 	ram = (void *)((char *)(void *)cpu_kh + ALIGN(sizeof *cpu_kh));
    100 	off = kd->dump_off;
    101 	do {
    102 		if (pa >= ram->start && (pa - ram->start) < ram->size) {
    103 			return off + (pa - ram->start);
    104 		}
    105 		ram++;
    106 		off += ram->size;
    107 	} while ((void *) ram < e && ram->size);
    108 
    109 	_kvm_err(kd, 0, "pa2off failed for pa %#" PRIxPADDR "\n", pa);
    110 	return (off_t) -1;
    111 }
    112 
    113 /*
    114  * Machine-dependent initialization for ALL open kvm descriptors,
    115  * not just those for a kernel crash dump.  Some architectures
    116  * have to deal with these NOT being constants!  (i.e. m68k)
    117  */
    118 int
    119 _kvm_mdopen(kvm_t *kd)
    120 {
    121 	kd->min_uva = VM_MIN_ADDRESS;
    122 	kd->max_uva = VM_MAXUSER_ADDRESS;
    123 
    124 	return (0);
    125 }
    126