Index: uspace/srv/hw/irc/obio/obio.c
===================================================================
--- uspace/srv/hw/irc/obio/obio.c	(revision 6610565b4f069eca9d1d17e21f317196b1a98756)
+++ uspace/srv/hw/irc/obio/obio.c	(revision 6610565b4f069eca9d1d17e21f317196b1a98756)
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2009 Jakub Jermar
+ * 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 obio 
+ * @{
+ */ 
+
+/**
+ * @file	obio.c
+ * @brief	OBIO driver.
+ *
+ * OBIO is a short for on-board I/O. On UltraSPARC IIi and systems with U2P,
+ * there is a piece of the root PCI bus controller address space, which
+ * contains interrupt mapping and clear registers for all on-board devices.
+ * Although UltraSPARC IIi and U2P are different in general, these registers can
+ * be found at the same addresses.
+ */
+
+#include <ipc/ipc.h>
+#include <ipc/services.h>
+#include <ipc/irc.h>
+#include <ipc/ns.h>
+#include <sysinfo.h>
+#include <as.h>
+#include <ddi.h>
+#include <align.h>
+#include <bool.h>
+#include <errno.h>
+#include <async.h>
+#include <align.h>
+#include <async.h>
+#include <stdio.h>
+#include <ipc/devmap.h>
+
+#define NAME "obio"
+
+#define OBIO_SIZE	0x1898	
+
+#define OBIO_IMR_BASE	0x200
+#define OBIO_IMR(ino)	(OBIO_IMR_BASE + ((ino) & INO_MASK))
+
+#define OBIO_CIR_BASE	0x300
+#define OBIO_CIR(ino)	(OBIO_CIR_BASE + ((ino) & INO_MASK))
+
+#define INO_MASK	0x1f
+
+static void *base_phys;
+static volatile uint64_t *base_virt;
+
+/** Handle one connection to obio.
+ *
+ * @param iid		Hash of the request that opened the connection.
+ * @param icall		Call data of the request that opened the connection.
+ */
+static void obio_connection(ipc_callid_t iid, ipc_call_t *icall)
+{
+	ipc_callid_t callid;
+	ipc_call_t call;
+
+	/*
+	 * Answer the first IPC_M_CONNECT_ME_TO call.
+	 */
+	ipc_answer_0(iid, EOK);
+
+	while (1) {
+		int inr;
+	
+		callid = async_get_call(&call);
+		switch (IPC_GET_IMETHOD(call)) {
+		case IRC_ENABLE_INTERRUPT:
+			/* Noop */
+			ipc_answer_0(callid, EOK);
+			break;
+		case IRC_CLEAR_INTERRUPT:
+			inr = IPC_GET_ARG1(call);
+			base_virt[OBIO_CIR(inr & INO_MASK)] = 0;
+			ipc_answer_0(callid, EOK);
+			break;
+		default:
+			ipc_answer_0(callid, EINVAL);
+			break;
+		}
+	}
+}
+
+/** Initialize the OBIO driver.
+ *
+ * So far, the driver heavily depends on information provided by the kernel via
+ * sysinfo. In the future, there should be a standalone OBIO driver.
+ */
+static bool obio_init(void)
+{
+	sysarg_t paddr;
+	
+	if (sysinfo_get_value("obio.base.physical", &paddr) != EOK) {
+		printf(NAME ": no OBIO registers found\n");
+		return false;
+	}
+	
+	base_phys = (void *) paddr;
+	base_virt = as_get_mappable_page(OBIO_SIZE);
+	
+	int flags = AS_AREA_READ | AS_AREA_WRITE;
+	int retval = physmem_map(base_phys, (void *) base_virt,
+	    ALIGN_UP(OBIO_SIZE, PAGE_SIZE) >> PAGE_WIDTH, flags);
+	
+	if (retval < 0) {
+		printf(NAME ": Error mapping OBIO registers\n");
+		return false;
+	}
+	
+	printf(NAME ": OBIO registers with base at %p\n", base_phys);
+	
+	async_set_client_connection(obio_connection);
+	sysarg_t phonead;
+	ipc_connect_to_me(PHONE_NS, SERVICE_OBIO, 0, 0, &phonead);
+	
+	return true;
+}
+
+int main(int argc, char **argv)
+{
+	printf(NAME ": HelenOS OBIO driver\n");
+	
+	if (!obio_init())
+		return -1;
+	
+	printf(NAME ": Accepting connections\n");
+	async_manager();
+
+	/* Never reached */
+	return 0;
+}
+
+/**
+ * @}
+ */ 
