Support files and a h/w tree description for the PSIM ppc simulator

Approved by: benno

1 files changed, 109 insertions, 0 deletions

diff --git a/sys/powerpc/psim/uart_iobus.c b/sys/powerpc/psim/uart_iobus.c
new file mode 100644
index 0000000..f2174ae
--- /dev/null
+++ b/sys/powerpc/psim/uart_iobus.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2002 by Peter Grehan. 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * PSIM local bus 16550
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/mutex.h>
+#include <sys/module.h>
+#include <sys/tty.h>
+#include <machine/bus_pio.h>
+#include <machine/bus.h>
+#include <sys/timepps.h>
+
+#include <dev/ofw/openfirm.h>
+#include <powerpc/psim/iobusvar.h>
+
+#include <dev/sio/sioreg.h>
+#include <dev/sio/siovar.h>
+
+#include <isa/isavar.h>  /* for isa_irq_pending() prototype */
+
+static  int     sio_iobus_attach(device_t dev);
+static  int     sio_iobus_probe(device_t dev);
+
+static device_method_t sio_iobus_methods[] = {
+        /* Device interface */
+	DEVMETHOD(device_probe,         sio_iobus_probe),
+	DEVMETHOD(device_attach,        sio_iobus_attach),
+
+	{ 0, 0 }
+};
+
+static driver_t sio_iobus_driver = {
+	sio_driver_name,
+	sio_iobus_methods,
+	0,
+};
+
+static int
+sio_iobus_attach(device_t dev)
+{
+	return (sioattach(dev, 0, DEFAULT_RCLK));
+}
+
+static int
+sio_iobus_probe(device_t dev)
+{
+	char *type = iobus_get_name(dev);
+
+	if (strncmp(type, "com", 3) != 0)
+		return (ENXIO);
+
+
+	device_set_desc(dev, "PSIM serial port");
+
+	/*
+	 * Call sioprobe with noprobe=1, to avoid hitting a psim bug
+	 */
+	return (sioprobe(dev, 0, 0, 1));
+}
+
+DRIVER_MODULE(sio, iobus, sio_iobus_driver, sio_devclass, 0, 0);
+
+/*
+ * Stub function. Perhaps a way to get this to work correctly would
+ * be for child devices to set a field in the dev structure to
+ * inform the parent that they are isa devices, and then use a
+ * intr_pending() call which would propagate up to nexus to see
+ * if the interrupt controller had any intrs in the isa group set
+ */
+intrmask_t
+isa_irq_pending(void)
+{
+	return (0);
+}