diff --git a/hwaccess.c b/hwaccess.c
new file mode 100644
index 0000000..7f7b805
--- /dev/null
+++ b/hwaccess.c
@@ -0,0 +1,83 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2009,2010 Carl-Daniel Hailfinger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <errno.h>
+#include "flash.h"
+
+#if defined(__FreeBSD__) || defined(__DragonFly__)
+int io_fd;
+#endif
+
+void get_io_perms(void)
+{
+#if defined (__sun) && (defined(__i386) || defined(__amd64))
+	if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) != 0) {
+#elif defined(__FreeBSD__) || defined (__DragonFly__)
+	if ((io_fd = open("/dev/io", O_RDWR)) < 0) {
+#else
+	if (iopl(3) != 0) {
+#endif
+		fprintf(stderr, "ERROR: Could not get I/O privileges (%s).\n"
+			"You need to be root.\n", strerror(errno));
+		exit(1);
+	}
+}
+
+void release_io_perms(void)
+{
+#if defined(__FreeBSD__) || defined(__DragonFly__)
+	close(io_fd);
+#endif
+}
+
+void mmio_writeb(uint8_t val, void *addr)
+{
+	*(volatile uint8_t *) addr = val;
+}
+
+void mmio_writew(uint16_t val, void *addr)
+{
+	*(volatile uint16_t *) addr = val;
+}
+
+void mmio_writel(uint32_t val, void *addr)
+{
+	*(volatile uint32_t *) addr = val;
+}
+
+uint8_t mmio_readb(void *addr)
+{
+	return *(volatile uint8_t *) addr;
+}
+
+uint16_t mmio_readw(void *addr)
+{
+	return *(volatile uint16_t *) addr;
+}
+
+uint32_t mmio_readl(void *addr)
+{
+	return *(volatile uint32_t *) addr;
+}