Index: kernel/genarch/src/drivers/bcm2835/mbox.c
===================================================================
--- kernel/genarch/src/drivers/bcm2835/mbox.c	(revision 44b2b78be3d89c7a81b12bc1276fd80e28175892)
+++ kernel/genarch/src/drivers/bcm2835/mbox.c	(revision 44b2b78be3d89c7a81b12bc1276fd80e28175892)
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2013 Beniamino Galvani
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - 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.
+ * - 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.
+ */
+/** @addtogroup genarch
+ * @{
+ */
+/**
+ * @file
+ * @brief BCM2835 mailbox communication routines
+ */
+
+#include <typedefs.h>
+#include <genarch/drivers/bcm2835/mbox.h>
+
+static void mbox_write(bcm2835_mbox_t *mbox, uint8_t chan, uint32_t value)
+{
+	if (!mbox)
+		mbox = (bcm2835_mbox_t *)BCM2835_MBOX0_ADDR;
+
+	while (mbox->status & MBOX_STATUS_FULL) ;
+	mbox->write = MBOX_COMPOSE(chan, value);
+}
+
+static uint32_t mbox_read(bcm2835_mbox_t *mbox, uint8_t chan)
+{
+	uint32_t msg;
+
+	if (!mbox)
+		mbox = (bcm2835_mbox_t *)BCM2835_MBOX0_ADDR;
+
+	do {
+		while (mbox->status & MBOX_STATUS_EMPTY) ;
+		msg = mbox->read;
+	} while (MBOX_MSG_CHAN(msg) != chan);
+
+	return MBOX_MSG_VALUE(msg);
+}
+
+bool bcm2835_prop_get_memory(uint32_t *base, uint32_t *size)
+{
+	bool ret;
+	ALLOC_PROP_BUFFER(req, mbox_getmem_buf_t);
+
+	req->buf_hdr.size = sizeof(mbox_getmem_buf_t);
+	req->buf_hdr.code = MBOX_PROP_CODE_REQ;
+	req->tag_hdr.tag_id = TAG_GET_ARM_MEMORY;
+	req->tag_hdr.buf_size = sizeof(mbox_tag_getmem_resp_t);
+	req->tag_hdr.val_len = 0;
+	req->zero = 0;
+
+	mbox_write(NULL, MBOX_CHAN_PROP_A2V, KA2VC((uint32_t)req));
+	mbox_read(NULL, MBOX_CHAN_PROP_A2V);
+
+	if (req->buf_hdr.code == MBOX_PROP_CODE_RESP_OK) {
+		*base = req->data.base;
+		*size = req->data.size;
+		ret = true;
+	} else {
+		ret = false;
+	}
+
+	return ret;
+}
+
+/**
+ * @}
+ */