1 files changed, 93 insertions, 0 deletions
diff --git a/sys/arch/macppc/dev/pgs.c b/sys/arch/macppc/dev/pgs.c
new file mode 100644
index 00000000000..cedb1bf265c
--- /dev/null
+++ b/sys/arch/macppc/dev/pgs.c
@@ -0,0 +1,93 @@
+/*	$OpenBSD: pgs.c,v 1.1 2010/04/09 19:24:17 jasper Exp $	*/
+/*
+ * Copyright (c) 2010 Jasper Lievisse Adriaanse <jasper@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This driver allows entering DDB by pushing the "Programmers Switch",
+ * which can be found on most any modern world MacPPC.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/device.h>
+
+#include <ddb/db_var.h>
+#include <dev/ofw/openfirm.h>
+
+#include <machine/bus.h>
+#include <machine/autoconf.h>
+
+struct pgs_softc {
+	struct device	sc_dev;
+	int		sc_node;
+	int 		sc_intr;
+};
+
+void	pgs_attach(struct device *, struct device *, void *);
+int	pgs_match(struct device *, void *, void *);
+int	pgs_intr(void *);
+
+struct cfattach pgs_ca = {
+	sizeof(struct pgs_softc), pgs_match, pgs_attach
+};
+
+struct cfdriver pgs_cd = {
+	NULL, "pgs", DV_DULL
+};
+
+int
+pgs_match(struct device *parent, void *arg, void *aux)
+{
+	struct confargs *ca = aux;
+
+	if (strcmp(ca->ca_name, "programmer-switch") == 0)
+		return 1;
+
+	return 0;
+}
+
+void
+pgs_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct pgs_softc *sc = (struct pgs_softc *)self;
+	struct confargs *ca = aux;
+	int intr[2];
+
+	sc->sc_node = ca->ca_node;
+
+	OF_getprop(sc->sc_node, "interrupts", intr, sizeof(intr));
+	sc->sc_intr = intr[0];
+
+	printf(": irq %d\n", sc->sc_intr);
+
+	mac_intr_establish(parent, sc->sc_intr, IST_LEVEL,
+	    IPL_HIGH, pgs_intr, sc, sc->sc_dev.dv_xname);
+}
+
+int
+pgs_intr(void *v)
+{
+#ifdef DDB
+	if (db_console)
+		Debugger();
+#else
+	printf("programmer-switch pressed, debugger not available.\n");
+#endif
+
+	return 1;
+}