mips alive again

1 files changed, 175 insertions, 0 deletions

diff --git a/lib/libkvm/kvm_mips.c b/lib/libkvm/kvm_mips.c
new file mode 100644
index 00000000000..9a8d1d7ff77
--- /dev/null
+++ b/lib/libkvm/kvm_mips.c
@@ -0,0 +1,175 @@
+/*	$OpenBSD: kvm_mips.c,v 1.10 2004/08/06 22:42:43 pefo Exp $ */
+/*	$NetBSD: kvm_mips.c,v 1.3 1996/03/18 22:33:44 thorpej 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. Modified for MIPS by Ralph Campbell.
+ *
+ * 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_mips.c	8.1 (Berkeley) 6/4/93";
+#else
+static char *rcsid = "$OpenBSD: kvm_mips.c,v 1.10 2004/08/06 22:42:43 pefo Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * MIPS machine dependent routines for kvm.  Hopefully, the forthcoming 
+ * vm code will one day obsolete this module.
+ */
+
+#include <sys/param.h>
+#include <sys/user.h>
+#include <sys/proc.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <nlist.h>
+#include <kvm.h>
+
+#include <limits.h>
+#include <db.h>
+
+#include "kvm_private.h"
+
+#include <machine/cpu.h>
+#include <machine/pte.h>
+#include <machine/pmap.h>
+
+struct vmstate {
+	pt_entry_t	*Sysmap;
+	u_int		Sysmapsize;
+};
+
+#define KREAD(kd, addr, p)\
+	(kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p)))
+
+void
+_kvm_freevtop(kd)
+	kvm_t *kd;
+{
+	if (kd->vmst != 0)
+		free(kd->vmst);
+}
+
+int
+_kvm_initvtop(kd)
+	kvm_t *kd;
+{
+	struct vmstate *vm;
+	struct nlist nlist[3];
+
+	vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
+	if (vm == 0)
+		return (-1);
+	kd->vmst = vm;
+
+	nlist[0].n_name = "Sysmap";
+	nlist[1].n_name = "Sysmapsize";
+	nlist[2].n_name = 0;
+
+	if (kvm_nlist(kd, nlist) != 0) {
+		_kvm_err(kd, kd->program, "bad namelist");
+		return (-1);
+	}
+	if (KREAD(kd, (u_long)nlist[0].n_value, &vm->Sysmap)) {
+		_kvm_err(kd, kd->program, "cannot read Sysmap");
+		return (-1);
+	}
+	if (KREAD(kd, (u_long)nlist[1].n_value, &vm->Sysmapsize)) {
+		_kvm_err(kd, kd->program, "cannot read mmutype");
+		return (-1);
+	}
+	return (0);
+}
+
+/*
+ * Translate a kernel virtual address to a physical address.
+ */
+int
+_kvm_kvatop(kd, va, pa)
+	kvm_t *kd;
+	u_long va;
+	u_long *pa;
+{
+	register struct vmstate *vm;
+	u_long pte, addr, offset;
+
+	if (ISALIVE(kd)) {
+		_kvm_err(kd, 0, "vatop called in live kernel!");
+		return((off_t)0);
+	}
+	vm = kd->vmst;
+	offset = va & PGOFSET;
+	/*
+	 * If we are initializing (kernel segment table pointer not yet set)
+	 * then return pa == va to avoid infinite recursion.
+	 */
+	if (vm->Sysmap == 0) {
+		*pa = va;
+		return (NBPG - offset);
+	}
+	if (va < KERNBASE ||
+	    va >= VM_MIN_KERNEL_ADDRESS + vm->Sysmapsize * NBPG)
+		goto invalid;
+	if (va < VM_MIN_KERNEL_ADDRESS) {
+		*pa = KSEG0_TO_PHYS(va);
+		return (NBPG - offset);
+	}
+	addr = (u_long)(vm->Sysmap + ((va - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT));
+	/*
+	 * Can't use KREAD to read kernel segment table entries.
+	 * Fortunately it is 1-to-1 mapped so we don't have to. 
+	 */
+	if (_kvm_pread(kd, kd->pmfd, (char *)&pte, sizeof(pte), (off_t)addr) < 0)
+		goto invalid;
+	if (!(pte & PG_V))
+		goto invalid;
+	*pa = (pte & PG_FRAME) | offset;
+	return (NBPG - offset);
+
+invalid:
+	_kvm_err(kd, 0, "invalid address (%lx)", va);
+	return (0);
+}
+
+off_t
+_kvm_pa2off(kd, pa)
+	kvm_t *kd;
+	u_long pa;
+{
+	_kvm_err(kd, 0, "pa2off going to be implemented!");
+	return 0;
+}