From f907f56cde6be702a62e8bba04eecaa35b3f573c Mon Sep 17 00:00:00 2001
From: dfr <dfr@FreeBSD.org>
Date: Tue, 23 Oct 2001 11:05:35 +0000
Subject: [PATCH] Partially port kvm to ia64 - virtual to physical translation
 is incomplete.

---
 lib/libkvm/kvm_ia64.c | 167 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 lib/libkvm/kvm_ia64.c

diff --git a/lib/libkvm/kvm_ia64.c b/lib/libkvm/kvm_ia64.c
new file mode 100644
index 000000000000..1a0907ae7132
--- /dev/null
+++ b/lib/libkvm/kvm_ia64.c
@@ -0,0 +1,167 @@
+/* $FreeBSD$ */
+/*	$NetBSD: kvm_alpha.c,v 1.7.2.1 1997/11/02 20:34:26 mellon Exp $	*/
+
+/*
+ * Copyright (c) 1994, 1995 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Chris G. Demetriou
+ * 
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+#include <sys/param.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/user.h>
+#include <sys/proc.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <nlist.h>
+#include <kvm.h>
+
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+
+#include <limits.h>
+#include <stdlib.h>
+#include <machine/pmap.h>
+#include "kvm_private.h"
+
+static off_t   _kvm_pa2off(kvm_t *kd, u_long pa);
+
+struct vmstate {
+	u_int64_t       lev1map_pa;             /* PA of Lev1map */
+        u_int64_t       page_size;              /* Page size */
+        u_int64_t       nmemsegs;               /* Number of RAM segm */
+};
+
+void
+_kvm_freevtop(kd)
+	kvm_t *kd;
+{
+
+	/* Not actually used for anything right now, but safe. */
+	if (kd->vmst != 0)
+		free(kd->vmst);
+}
+
+int
+_kvm_initvtop(kd)
+	kvm_t *kd;
+{
+	struct vmstate *vm;
+	struct nlist nlist[2];
+	u_long pa;
+
+	vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
+	if (vm == 0) {
+		_kvm_err(kd, kd->program, "cannot allocate vm");
+		return (-1);
+	}
+	kd->vmst = vm;
+	vm->page_size = PAGE_SIZE;
+
+	nlist[0].n_name = "_Lev1map";
+	nlist[1].n_name = 0;
+
+	if (kvm_nlist(kd, nlist) != 0) {
+		_kvm_err(kd, kd->program, "bad namelist");
+		return (-1);
+	}
+
+	if(!ISALIVE(kd)) {
+		if (kvm_read(kd, (nlist[0].n_value), &pa, sizeof(pa)) != sizeof(pa)) {
+			_kvm_err(kd, kd->program, "cannot read Lev1map");
+			return (-1);
+		}
+	} else 
+		if (kvm_read(kd, (nlist[0].n_value), &pa, sizeof(pa)) != sizeof(pa)) {
+			_kvm_err(kd, kd->program, "cannot read Lev1map");
+			return (-1);
+		}
+	vm->lev1map_pa = pa;
+	return (0);
+
+}
+
+int
+_kvm_kvatop(kd, va, pa)
+	kvm_t *kd;
+	u_long va;
+	u_long *pa;
+{
+	u_int64_t       lev1map_pa;             /* PA of Lev1map */
+        u_int64_t       page_size;
+	int rv, page_off;
+	pv_entry_t pte;
+	off_t pteoff;
+	struct vmstate *vm;
+	vm = kd->vmst ;
+	
+
+        if (ISALIVE(kd)) {
+                _kvm_err(kd, 0, "vatop called in live kernel!");
+                return(0);
+        }
+	lev1map_pa = vm->lev1map_pa;
+	page_size  = vm->page_size;
+
+	page_off = va & (page_size - 1);
+	if (va >= IA64_RR_BASE(6) && va <= IA64_RR_BASE(7) + ((1L<<61)-1)) {
+		/*
+		 * Direct-mapped address: just convert it.
+		 */
+
+		*pa = IA64_RR_MASK(va);
+		rv = page_size - page_off;
+	} else if (va >= IA64_RR_BASE(5) && va < IA64_RR_BASE(6)) {
+		/*
+		 * Real kernel virtual address: do the translation.
+		 */
+		goto lose;
+	} else {
+		/*
+		 * Bogus address (not in KV space): punt.
+		 */
+
+		_kvm_err(kd, 0, "invalid kernel virtual address");
+lose:
+		*pa = -1;
+		rv = 0;
+	}
+
+	return (rv);
+}
+
+/*
+ * Translate a physical address to a file-offset in the crash-dump.
+ */
+off_t   
+_kvm_pa2off(kd, pa)
+	kvm_t *kd;
+	u_long pa;
+{
+	return IA64_PHYS_TO_RR7(pa);
+}
+