From 96ef40f8455272d79d32350d178c5d8b08251e6e Mon Sep 17 00:00:00 2001 From: drahn Date: Thu, 29 Apr 2021 20:00:18 +0000 Subject: [PATCH] riscv64 libkvm support copied from aarch64 with minimal changes --- lib/libkvm/kvm_riscv64.c | 131 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 131 insertions(+) create mode 100644 lib/libkvm/kvm_riscv64.c diff --git a/lib/libkvm/kvm_riscv64.c b/lib/libkvm/kvm_riscv64.c new file mode 100644 index 00000000000..10d3d6b570c --- /dev/null +++ b/lib/libkvm/kvm_riscv64.c @@ -0,0 +1,131 @@ +/* $OpenBSD: kvm_riscv64.c,v 1.1 2021/04/29 20:00:18 drahn Exp $ */ +/* + * Copyright (c) 2006 Miodrag Vallat. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice, this permission notice, and the disclaimer below + * appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +/*- + * Copyright (C) 1996 Wolfgang Solfrank. + * Copyright (C) 1996 TooLs GmbH. + * All rights reserved. + * + * 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 TooLs GmbH. + * 4. The name of TooLs GmbH may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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. + */ + +/* + * RISCV machine dependent routines for kvm. + */ + +#include +#include +#include +#include + +#include +#include +#include +#include + +#include + +#include "kvm_private.h" + +#include + +void +_kvm_freevtop(kvm_t *kd) +{ + free(kd->vmst); + kd->vmst = NULL; +} + +int +_kvm_initvtop(kvm_t *kd) +{ + return (0); +} + +/* + * Translate a kernel virtual address to a physical address by walking + * the kernels page table. + */ + +int +_kvm_kvatop(kvm_t *kd, u_long va, paddr_t *pa) +{ + cpu_kcore_hdr_t *cpup = kd->cpu_data; + + if (ISALIVE(kd)) { + _kvm_err(kd, 0, "vatop called in live kernel!"); + return (0); + } + + /* + * This relies upon the kernel text and data being contiguous + * in the first memory segment. + * Other virtual addresses are not reachable yet. + */ + + if (va >= cpup->kernelbase + cpup->kerneloffs && + va < cpup->kernelbase + cpup->kerneloffs + cpup->staticsize) { + *pa = (va - cpup->kernelbase) + + (paddr_t)cpup->ram_segs[0].start; + return (int)(kd->nbpg - (va & (kd->nbpg - 1))); + } + + _kvm_err(kd, 0, "kvm_vatop: va %lx unreachable", va); + return (0); +} + +off_t +_kvm_pa2off(kvm_t *kd, paddr_t pa) +{ + cpu_kcore_hdr_t *cpup = kd->cpu_data; + phys_ram_seg_t *mp = cpup->ram_segs; + off_t off = 0; + int block; + + for (block = 0; block < NPHYS_RAM_SEGS; block++, mp++) { + if (pa >= mp->start && pa < mp->start + mp->size) + return (kd->dump_off + off + + (off_t)(pa - (paddr_t)mp->start)); + off += (off_t)mp->size; + } + + _kvm_err(kd, 0, "not a physical address: %lx", pa); + return (-1); +} -- 2.20.1