130 lines
4.0 KiB
C
130 lines
4.0 KiB
C
/* $OpenBSD: kvm_riscv64.c,v 1.3 2021/12/01 21:45:19 deraadt Exp $ */
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/*
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* Copyright (c) 2006 Miodrag Vallat.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice, this permission notice, and the disclaimer below
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* appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*-
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* Copyright (C) 1996 Wolfgang Solfrank.
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* Copyright (C) 1996 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* RISCV machine dependent routines for kvm.
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*/
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#include <sys/types.h>
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#include <sys/kcore.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <db.h>
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#include "kvm_private.h"
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#include <machine/kcore.h>
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void
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_kvm_freevtop(kvm_t *kd)
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{
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free(kd->vmst);
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kd->vmst = NULL;
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}
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int
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_kvm_initvtop(kvm_t *kd)
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{
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return (0);
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}
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/*
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* Translate a kernel virtual address to a physical address by walking
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* the kernels page table.
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*/
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int
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_kvm_kvatop(kvm_t *kd, u_long va, paddr_t *pa)
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{
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cpu_kcore_hdr_t *cpup = kd->cpu_data;
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if (ISALIVE(kd)) {
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_kvm_err(kd, 0, "vatop called in live kernel!");
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return (0);
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}
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/*
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* This relies upon the kernel text and data being contiguous
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* in the first memory segment.
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* Other virtual addresses are not reachable yet.
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*/
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if (va >= cpup->kernelbase + cpup->kerneloffs &&
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va < cpup->kernelbase + cpup->kerneloffs + cpup->staticsize) {
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*pa = (va - cpup->kernelbase) +
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(paddr_t)cpup->ram_segs[0].start;
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return (int)(kd->nbpg - (va & (kd->nbpg - 1)));
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}
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_kvm_err(kd, 0, "kvm_vatop: va %lx unreachable", va);
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return (0);
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}
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off_t
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_kvm_pa2off(kvm_t *kd, paddr_t pa)
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{
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cpu_kcore_hdr_t *cpup = kd->cpu_data;
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phys_ram_seg_t *mp = cpup->ram_segs;
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off_t off = 0;
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int block;
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for (block = 0; block < NPHYS_RAM_SEGS; block++, mp++) {
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if (pa >= mp->start && pa < mp->start + mp->size)
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return (kd->dump_off + off +
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(off_t)(pa - (paddr_t)mp->start));
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off += (off_t)mp->size;
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}
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_kvm_err(kd, 0, "not a physical address: %lx", pa);
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return (-1);
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}
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