Work in progress support for the SGI Indigo, Indigo 2 and Indy systems

(IP20, IP22, IP24) in 64-bit mode, adapated from NetBSD. Currently limited
to headless operation, input and video drivers will get ported soon.

Should work on all R4000, R4440 and R5000 based systems. L2 cache on R5000SC
Indy not supported yet (coming soon), R4600 not supported yet either (coming
soon as well).

Tested to boot multiuser on: Indigo2 R4000SC, Indy R4000PC, Indy R4000SC,
Indy R5000SC, Indigo2 R4400SC. There are still glitches in the Ethernet driver
which are being looked at.

Expansion support is limited to the GIO E++ board; GIO boards with PCI-GIO
bridges not ported yet due to the lack of hardware, and this kind of driver
does not port blindly.

Most of this work comes from NetBSD, polishing and integration work, as well
as putting as many ``R4x00 in 64-bit mode'' erratas as necessary, by yours
truly.

More work is coming, as well as trying to get some easy way to boot install
kernels (as older PROM can only boot ECOFF binaries, which won't do for the
kernel).

1 files changed, 192 insertions, 0 deletions

diff --git a/sys/arch/sgi/hpc/dsclock.c b/sys/arch/sgi/hpc/dsclock.c
new file mode 100644
index 00000000000..396d68ec9d9
--- /dev/null
+++ b/sys/arch/sgi/hpc/dsclock.c
@@ -0,0 +1,192 @@
+/*	$OpenBSD: dsclock.c,v 1.1 2012/03/28 20:44:23 miod Exp $	*/
+/*	$NetBSD: dsclock.c,v 1.5 2011/07/01 18:53:46 dyoung Exp $	*/
+
+/*
+ * Copyright (c) 2001 Rafal K. Boni
+ * Copyright (c) 2001 Christopher Sekiya
+ * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Portions of this code are derived from software contributed to The
+ * NetBSD Foundation by Jason R. Thorpe of the Numerical Aerospace
+ * Simulation Facility, NASA Ames Research Center.
+ *
+ * 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.
+ */
+
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+
+#include <machine/autoconf.h>
+#include <machine/bus.h>
+
+#include <mips64/archtype.h>
+#include <mips64/dev/clockvar.h>
+
+#include <dev/ic/ds1286reg.h>
+#include <sgi/hpc/hpcvar.h>
+
+#define	IRIX_BASE_YEAR	1940
+
+struct dsclock_softc {
+	struct device		sc_dev;
+
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_ioh;
+};
+
+int	dsclock_match(struct device *, void *, void *);
+void	dsclock_attach(struct device *, struct device *, void *);
+
+struct cfdriver dsclock_cd = {
+	NULL, "dsclock", DV_DULL
+};
+
+const struct cfattach dsclock_ca = {
+	sizeof(struct dsclock_softc), dsclock_match, dsclock_attach
+};
+
+#define	ds1286_read(sc,r) \
+	bus_space_read_1((sc)->sc_iot, (sc)->sc_ioh, ((r) << 2) + 3)
+#define	ds1286_write(sc,r,v) \
+	bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, ((r) << 2) + 3, (v))
+
+static inline int frombcd(int);
+static inline int tobcd(int);
+
+static inline int
+frombcd(int x)
+{
+	return (x >> 4) * 10 + (x & 0xf);
+}
+static inline int
+tobcd(int x)
+{
+	return (x / 10 * 16) + (x % 10);
+}
+
+void	dsclock_gettime(void *, time_t, struct tod_time *);
+void	dsclock_settime(void *, struct tod_time *);
+
+int
+dsclock_match(struct device *parent, void *vcf, void *aux)
+{
+	struct hpc_attach_args *haa = aux;
+
+	if (strcmp(haa->ha_name, dsclock_cd.cd_name) != 0)
+		return 0;
+
+	return 1;
+}
+
+void
+dsclock_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct dsclock_softc *sc = (void *)self;
+	struct hpc_attach_args *haa = aux;
+
+	sc->sc_iot = haa->ha_st;
+	if (bus_space_subregion(haa->ha_st, haa->ha_sh, haa->ha_devoff,
+	    4 * 8192, &sc->sc_ioh) != 0) {
+		printf(": can't map registers\n");
+		return;
+	}
+
+	printf("\n");
+
+	sys_tod.tod_get = dsclock_gettime;
+	sys_tod.tod_set = dsclock_settime;
+	sys_tod.tod_cookie = self;
+}
+
+/*
+ * Get the time of day, based on the clock's value and/or the base value.
+ */
+void
+dsclock_gettime(void *cookie, time_t base, struct tod_time *ct)
+{
+	struct dsclock_softc *sc = (void *)cookie;
+	ds1286_todregs regs;
+	int s;
+
+	s = splhigh();
+	DS1286_GETTOD(sc, &regs)
+	splx(s);
+
+	ct->sec = frombcd(regs[DS1286_SEC]);
+	ct->min = frombcd(regs[DS1286_MIN]);
+
+	if (regs[DS1286_HOUR] & DS1286_HOUR_12MODE) {
+		ct->hour = frombcd(regs[DS1286_HOUR] & DS1286_HOUR_12HR_MASK) +
+		    ((regs[DS1286_HOUR] & DS1286_HOUR_12HR_PM) ? 12 : 0);
+
+		/*
+		 * In AM/PM mode, hour range is 01-12, so adding in 12 hours
+		 * for PM gives us 01-24, whereas we want 00-23, so map hour
+		 * 24 to hour 0.
+		 */
+		if (ct->hour == 24)
+			ct->hour = 0;
+	} else {
+		 ct->hour = frombcd(regs[DS1286_HOUR] & DS1286_HOUR_24HR_MASK);
+	}
+
+	ct->day = frombcd(regs[DS1286_DOM]);
+	ct->mon = frombcd(regs[DS1286_MONTH] & DS1286_MONTH_MASK);
+	ct->year = frombcd(regs[DS1286_YEAR]) + (IRIX_BASE_YEAR - 1900);
+}
+
+/*
+ * Reset the TODR based on the time value.
+ */
+void
+dsclock_settime(void *cookie, struct tod_time *ct)
+{
+	struct dsclock_softc *sc = (void *)cookie;
+	ds1286_todregs regs;
+	int s;
+
+	s = splhigh();
+	DS1286_GETTOD(sc, &regs);
+	splx(s);
+
+	regs[DS1286_SUBSEC] = 0;
+	regs[DS1286_SEC] = tobcd(ct->sec);
+	regs[DS1286_MIN] = tobcd(ct->min);
+	regs[DS1286_HOUR] = tobcd(ct->hour) & DS1286_HOUR_24HR_MASK;
+	regs[DS1286_DOW] = tobcd(ct->dow);
+	regs[DS1286_DOM] = tobcd(ct->day);
+
+	/* Leave wave-generator bits as set originally */
+	regs[DS1286_MONTH] &=  ~DS1286_MONTH_MASK;
+	regs[DS1286_MONTH] |=  tobcd(ct->mon) & DS1286_MONTH_MASK;
+
+	regs[DS1286_YEAR] = tobcd(ct->year - (IRIX_BASE_YEAR - 1900));
+
+	s = splhigh();
+	DS1286_PUTTOD(sc, &regs);
+	splx(s);
+}