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).

3 files changed, 191 insertions, 1 deletions

diff --git a/sys/arch/sgi/include/autoconf.h b/sys/arch/sgi/include/autoconf.h
index b71366edba6..d3db14d94e5 100644
--- a/sys/arch/sgi/include/autoconf.h
+++ b/sys/arch/sgi/include/autoconf.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: autoconf.h,v 1.32 2012/03/25 13:52:52 miod Exp $ */
+/*	$OpenBSD: autoconf.h,v 1.33 2012/03/28 20:44:23 miod Exp $ */
 
 /*
  * Copyright (c) 2001-2003 Opsycon AB  (www.opsycon.se / www.opsycon.com)
@@ -93,6 +93,7 @@ void	arcs_device_register(struct device *, void *);
 void	dksc_device_register(struct device *, void *);
 extern	void (*_device_register)(struct device *, void *);
 
+void	ip22_setup(void);
 void	ip27_setup(void);
 void	ip27_autoconf(struct device *);
 void	ip30_setup(void);
diff --git a/sys/arch/sgi/include/eisa_machdep.h b/sys/arch/sgi/include/eisa_machdep.h
new file mode 100644
index 00000000000..93ba8c4c4e8
--- /dev/null
+++ b/sys/arch/sgi/include/eisa_machdep.h
@@ -0,0 +1,68 @@
+/*	$OpenBSD: eisa_machdep.h,v 1.1 2012/03/28 20:44:23 miod Exp $	*/
+/*	$NetBSD: eisa_machdep.h,v 1.4 1997/06/06 23:12:52 thorpej Exp $	*/
+
+/*
+ * Copyright (c) 1996 Christopher G. Demetriou.  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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Christopher G. Demetriou
+ *	for the NetBSD Project.
+ * 4. 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.
+ */
+
+/*
+ * Machine-specific definitions for EISA autoconfiguration.
+ */
+
+/*
+ * EISA spaces memory layout
+ */
+
+#define	EISA_IO_BASE	0x00080000
+#define	EISA_IO_END	0x00090000
+
+#define	EISA_MEM0_BASE	0x00100000
+#define	EISA_MEM0_END	0x08000000
+
+#define	EISA_MEM1_BASE	0x80000000
+#define	EISA_MEM1_END	0x100000000UL
+
+/*
+ * Types provided to machine-independent EISA code.
+ */
+typedef void *eisa_chipset_tag_t;
+typedef int eisa_intr_handle_t;
+
+/*
+ * Functions provided to machine-independent EISA code.
+ */
+void		eisa_attach_hook(struct device *, struct device *,
+		    struct eisabus_attach_args *);
+int		eisa_maxslots(eisa_chipset_tag_t);
+int		eisa_intr_map(eisa_chipset_tag_t, u_int,
+		    eisa_intr_handle_t *);
+const char	*eisa_intr_string(eisa_chipset_tag_t, eisa_intr_handle_t);
+void		*eisa_intr_establish(eisa_chipset_tag_t, eisa_intr_handle_t,
+		    int, int, int (*)(void *), void *, char *);
+void		eisa_intr_disestablish(eisa_chipset_tag_t, void *);
diff --git a/sys/arch/sgi/include/z8530var.h b/sys/arch/sgi/include/z8530var.h
new file mode 100644
index 00000000000..5fab516b720
--- /dev/null
+++ b/sys/arch/sgi/include/z8530var.h
@@ -0,0 +1,121 @@
+/*	$OpenBSD: z8530var.h,v 1.1 2012/03/28 20:44:23 miod Exp $	*/
+/*	$NetBSD: z8530var.h,v 1.10 2011/07/01 21:00:21 dyoung Exp $	*/
+
+/*
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Lawrence Berkeley Laboratory.
+ *
+ * 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. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ *
+ *	@(#)zsvar.h	8.1 (Berkeley) 6/11/93
+ */
+
+/*
+ * Copyright (c) 1994 Gordon W. Ross
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Lawrence Berkeley Laboratory.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ *
+ *	@(#)zsvar.h	8.1 (Berkeley) 6/11/93
+ */
+
+#include <machine/bus.h>
+#include <sgi/hpc/z8530sc.h>
+
+struct zs_channel {
+	struct zs_chanstate	cs_zscs; 	/* Required: soft state */
+	bus_space_tag_t		cs_bustag;	/* Machine-dependent */
+	bus_space_handle_t	cs_regs;
+};
+
+struct zsc_softc {
+	struct device		zsc_dev;	/* required: base device */
+	struct	zs_chanstate   *zsc_cs[2];	/* channel soft state */
+	struct	zs_channel	zsc_cs_store[2];
+	/* Machine-dependent part follows... */
+	bus_space_tag_t		zsc_bustag;	/* Bus type */
+	bus_space_handle_t	zsc_base; 	/* Device base address */
+	void		       *sc_si;		/* Softinterrupt handle */
+};
+
+/*
+ * Functions to read and write individual registers in a channel.
+ * The SCC chip requires 3-4 PCLK cycles recovery time between accesses
+ */
+
+uint8_t zs_read_reg(struct zs_chanstate *, uint8_t);
+uint8_t zs_read_csr(struct zs_chanstate *);
+uint8_t zs_read_data(struct zs_chanstate *);
+
+void  zs_write_reg(struct zs_chanstate *, uint8_t, uint8_t);
+void  zs_write_csr(struct zs_chanstate *, uint8_t);
+void  zs_write_data(struct zs_chanstate *, uint8_t);
+
+/* Zilog Serial hardware interrupts (level 0) */
+#define splzs()		spltty()
+#define	IPL_ZS		IPL_TTY