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, 63 insertions, 0 deletions

diff --git a/sys/arch/sgi/hpc/hpcdma.h b/sys/arch/sgi/hpc/hpcdma.h
new file mode 100644
index 00000000000..bca5fc5b171
--- /dev/null
+++ b/sys/arch/sgi/hpc/hpcdma.h
@@ -0,0 +1,63 @@
+/*	$OpenBSD: hpcdma.h,v 1.1 2012/03/28 20:44:23 miod Exp $	*/
+/*	$NetBSD: hpcdma.h,v 1.11 2011/07/01 18:53:46 dyoung Exp $	*/
+
+/*
+ * Copyright (c) 2001 Wayne Knowles
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Wayne Knowles
+ *
+ * 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 NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+struct hpc_dma_softc {
+	bus_space_tag_t		sc_bst;
+	bus_space_handle_t	sc_bsh;
+	bus_dma_tag_t		sc_dmat;
+
+	uint32_t		sc_flags;
+#define	HPCDMA_READ	0x20		/* direction of transfer */
+#define	HPCDMA_LOADED	0x40		/* bus_dmamap loaded */
+#define	HPCDMA_ACTIVE	0x80		/* DMA engine is busy */
+	uint32_t		sc_dmacmd;
+	int			sc_ndesc;
+	bus_dmamap_t		sc_dmamap;
+	struct hpc_dma_desc    *sc_desc_kva;	/* Virtual address */
+	bus_addr_t		sc_desc_pa;	/* DMA address */
+	ssize_t			sc_dlen;	/* number of bytes transfered */
+	struct hpc_values       *hpc;		/* constants for HPC1/3 */
+};
+
+
+void hpcdma_init(struct hpc_attach_args *, struct hpc_dma_softc *, int);
+void hpcdma_sglist_create(struct hpc_dma_softc *, bus_dmamap_t);
+void hpcdma_cntl(struct hpc_dma_softc *, uint32_t);
+void hpcdma_reset(struct hpc_dma_softc *);
+void hpcdma_flush(struct hpc_dma_softc *);