diff --git a/sys/arch/pc532/pc532/db_memrw.c b/sys/arch/pc532/pc532/db_memrw.c
new file mode 100644
index 000000000000..af5d8b13eeba
--- /dev/null
+++ b/sys/arch/pc532/pc532/db_memrw.c
@@ -0,0 +1,193 @@
+/*	$NetBSD: db_memrw.c,v 1.1 1996/10/09 07:45:00 matthias Exp $	*/
+
+/*
+ * Copyright (c) 1996 Gordon W. Ross
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+/*
+ * Interface to the debugger for virtual memory read/write.
+ * This file is shared by DDB and KGDB, and must work even
+ * when only KGDB is included (thus no db_printf calls).
+ *
+ * To write in the text segment, we have to first make
+ * the page writable, do the write, then restore the PTE.
+ * For writes outside the text segment, and all reads,
+ * just do the access -- if it causes a fault, the debugger
+ * will recover with a longjmp to an appropriate place.
+ *
+ * ALERT!  If you want to access device registers with a
+ * specific size, then the read/write functions have to
+ * make sure to do the correct sized pointer access.
+ */
+
+#include <sys/param.h>
+#include <sys/proc.h>
+
+#include <vm/vm.h>
+
+#include <machine/pte.h>
+#include <machine/db_machdep.h>
+#include <machine/cpufunc.h>
+
+#include <ddb/db_access.h>
+
+/*
+ * Read bytes from kernel address space for debugger.
+ * This used to check for valid PTEs, but now that
+ * traps in DDB work correctly, "Just Do It!"
+ */
+void
+db_read_bytes(addr, size, data)
+	vm_offset_t	addr;
+	register size_t	size;
+	register char	*data;
+{
+	register char	*src = (char*)addr;
+
+	if (size == 4) {
+		*((int*)data) = *((int*)src);
+		return;
+	}
+
+	if (size == 2) {
+		*((short*)data) = *((short*)src);
+		return;
+	}
+
+	while (size > 0) {
+		--size;
+		*data++ = *src++;
+	}
+}
+
+static void
+set_pte(addr, pte)
+	vm_offset_t addr;
+	pt_entry_t pte;
+{
+	*(pt_entry_t *)pmap_pte(pmap_kernel(), addr) = pte;
+	pmap_update();
+}
+
+/*
+ * Write bytes somewhere in kernel text.
+ * Makes text page writable temporarily.
+ */
+static void
+db_write_text(addr, size, data)
+	vm_offset_t	addr;
+	register size_t	size;
+	register char	*data;
+{
+	register char 	*dst;
+	pt_entry_t	oldpte, tmppte;
+	vm_offset_t	pgva, prevpg;
+
+	/* Prevent restoring a garbage PTE. */
+	if (size <= 0)
+		return;
+
+	dst = (char*)addr;
+	pgva = ns532_trunc_page((long)dst);
+
+	goto firstpage;
+	do {
+
+		/*
+		 * If we are on a new page, restore the PTE
+		 * for the previous page, and make the new
+		 * page writable.
+		 */
+		pgva = ns532_trunc_page((long)dst);
+		if (pgva != prevpg) {
+			/*
+			 * Restore old PTE.
+			 */
+			set_pte(prevpg, oldpte);
+
+		firstpage:
+			oldpte = *(pt_entry_t *)pmap_pte(pmap_kernel(), pgva);
+			if ((oldpte & PG_V) == 0) {
+				printf(" address 0x%x not a valid page\n", dst);
+				return;
+			}
+			tmppte = oldpte | PG_RW;
+			set_pte(pgva, tmppte);
+
+			prevpg = pgva;
+		}
+
+		/* Now we can write in this page of kernel text... */
+		*dst++ = *data++;
+
+	} while (--size > 0);
+
+	/* Restore old PTE for the last page touched. */
+	set_pte(prevpg, oldpte);
+
+	/* Finally, clear the instruction cache. */
+	cinv(ia, 0);
+}
+
+/*
+ * Write bytes to kernel address space for debugger.
+ */
+void
+db_write_bytes(addr, size, data)
+	vm_offset_t	addr;
+	register size_t	size;
+	register char	*data;
+{
+	register char	*dst = (char *)addr;
+	extern char	kernel_text[], etext[];
+
+	/* If any part is in kernel text, use db_write_text() */
+	if ((dst < etext) && ((dst + size) > kernel_text)) {
+		db_write_text(dst, size, data);
+		return;
+	}
+
+	if (size == 4) {
+		*((int*)dst) = *((int*)data);
+		return;
+	}
+
+	if (size == 2) {
+		*((short*)dst) = *((short*)data);
+		return;
+	}
+
+	while (size > 0) {
+		--size;
+		*dst++ = *data++;
+	}
+}
+
+void
+Debugger()
+{
+	asm("bpt");
+}