Big TURBOchannel support catchup from NetBSD, part 1.

A few local changes and tweaks remain.

This bring DEC 3000 machines back in the game, but framebuffers are still
not supported at the moment.

Thanks to ericj@ and nate@ for supplying me a DEC 3000 for testing.

1 files changed, 247 insertions, 0 deletions

diff --git a/sys/arch/alpha/tc/tc_dma_3000_500.c b/sys/arch/alpha/tc/tc_dma_3000_500.c
new file mode 100644
index 00000000000..49732d62ec9
--- /dev/null
+++ b/sys/arch/alpha/tc/tc_dma_3000_500.c
@@ -0,0 +1,247 @@
+/* $OpenBSD: tc_dma_3000_500.c,v 1.1 2002/05/02 22:56:06 miod Exp $ */
+/* $NetBSD: tc_dma_3000_500.c,v 1.13 2001/07/19 06:40:03 thorpej Exp $ */
+
+/*-
+ * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is 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. 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.
+ */
+
+#define _ALPHA_BUS_DMA_PRIVATE
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+
+#include <uvm/uvm_extern.h>
+
+#include <machine/bus.h>
+
+#include <dev/tc/tcvar.h>
+#include <alpha/tc/tc_sgmap.h>
+#include <alpha/tc/tc_dma_3000_500.h>
+
+struct alpha_bus_dma_tag tc_dmat_sgmap = {
+	NULL,				/* _cookie */
+	0,				/* _wbase */
+	0,				/* _wsize */
+	NULL,				/* _next_window */
+	0,				/* _boundary */
+	NULL,				/* _sgmap */
+	NULL,				/* _get_tag */
+	tc_bus_dmamap_create_sgmap,
+	tc_bus_dmamap_destroy_sgmap,
+	tc_bus_dmamap_load_sgmap,
+	tc_bus_dmamap_load_mbuf_sgmap,
+	tc_bus_dmamap_load_uio_sgmap,
+	tc_bus_dmamap_load_raw_sgmap,
+	tc_bus_dmamap_unload_sgmap,
+	_bus_dmamap_sync,
+	_bus_dmamem_alloc,
+	_bus_dmamem_free,
+	_bus_dmamem_map,
+	_bus_dmamem_unmap,
+	_bus_dmamem_mmap,
+};
+
+struct tc_dma_slot_info {
+	struct alpha_sgmap tdsi_sgmap;		/* sgmap for slot */
+	struct alpha_bus_dma_tag tdsi_dmat;	/* dma tag for slot */
+};
+struct tc_dma_slot_info *tc_dma_slot_info;
+
+void
+tc_dma_init_3000_500(nslots)
+	int nslots;
+{
+	extern struct alpha_bus_dma_tag tc_dmat_direct;
+	size_t sisize;
+	int i;
+
+	/* Allocate per-slot DMA info. */
+	sisize = nslots * sizeof(struct tc_dma_slot_info);
+	tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT);
+	if (tc_dma_slot_info == NULL)
+		panic("tc_dma_init: can't allocate per-slot DMA info");
+	memset(tc_dma_slot_info, 0, sisize);
+
+	/* Default all slots to direct-mapped. */
+	for (i = 0; i < nslots; i++)
+		memcpy(&tc_dma_slot_info[i].tdsi_dmat, &tc_dmat_direct,
+		    sizeof(tc_dma_slot_info[i].tdsi_dmat));
+}
+
+/*
+ * Return the DMA tag for the given slot.
+ */
+bus_dma_tag_t
+tc_dma_get_tag_3000_500(slot)
+	int slot;
+{
+
+	return (&tc_dma_slot_info[slot].tdsi_dmat);
+}
+
+/*
+ * Create a TurboChannel SGMAP-mapped DMA map.
+ */
+int
+tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary,
+    flags, dmamp)
+	bus_dma_tag_t t;
+	bus_size_t size;
+	int nsegments;
+	bus_size_t maxsegsz;
+	bus_size_t boundary;
+	int flags;
+	bus_dmamap_t *dmamp;
+{
+	bus_dmamap_t map;
+	int error;
+
+	error = _bus_dmamap_create(t, size, nsegments, maxsegsz,
+	    boundary, flags, dmamp);
+	if (error)
+		return (error);
+
+	map = *dmamp;
+
+	/* XXX BUS_DMA_ALLOCNOW */
+
+	return (error);
+}
+
+/*
+ * Destroy a TurboChannel SGMAP-mapped DMA map.
+ */
+void
+tc_bus_dmamap_destroy_sgmap(t, map)
+	bus_dma_tag_t t;
+	bus_dmamap_t map;
+{
+
+	KASSERT(map->dm_mapsize == 0);
+
+	_bus_dmamap_destroy(t, map);
+}
+
+/*
+ * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer.
+ */
+int
+tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags)
+	bus_dma_tag_t t;
+	bus_dmamap_t map;
+	void *buf;
+	bus_size_t buflen;
+	struct proc *p;
+	int flags;
+{
+	struct tc_dma_slot_info *tdsi = t->_cookie;
+
+	return (tc_sgmap_load(t, map, buf, buflen, p, flags,
+	    &tdsi->tdsi_sgmap));
+}
+
+/*
+ * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain.
+ */
+int
+tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags)
+	bus_dma_tag_t t;
+	bus_dmamap_t map;
+	struct mbuf *m;
+	int flags;
+{
+	struct tc_dma_slot_info *tdsi = t->_cookie;
+
+	return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap));
+}
+
+/*
+ * Load a TurboChannel SGMAP-mapped DMA map with a uio.
+ */
+int
+tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags)
+	bus_dma_tag_t t;
+	bus_dmamap_t map;
+	struct uio *uio;
+	int flags;
+{
+	struct tc_dma_slot_info *tdsi = t->_cookie;
+
+	return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap));
+}
+
+/*
+ * Load a TurboChannel SGMAP-mapped DMA map with raw memory.
+ */
+int
+tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags)
+	bus_dma_tag_t t;
+	bus_dmamap_t map;
+	bus_dma_segment_t *segs;
+	int nsegs;
+	bus_size_t size;
+	int flags;
+{
+	struct tc_dma_slot_info *tdsi = t->_cookie;
+
+	return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags,
+	    &tdsi->tdsi_sgmap));
+}
+
+/*
+ * Unload a TurboChannel SGMAP-mapped DMA map.
+ */
+void
+tc_bus_dmamap_unload_sgmap(t, map)
+	bus_dma_tag_t t;
+	bus_dmamap_t map;
+{
+	struct tc_dma_slot_info *tdsi = t->_cookie;
+
+	/*
+	 * Invalidate any SGMAP page table entries used by this
+	 * mapping.
+	 */
+	tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap);
+
+	/*
+	 * Do the generic bits of the unload.
+	 */
+	_bus_dmamap_unload(t, map);
+}