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[src/trunk]: src/sys/arch/m68k bus_dma(9) pulled pretty much verbatim from ne...
details: https://anonhg.NetBSD.org/src/rev/1197f9c79d5f
branches: trunk
changeset: 525336:1197f9c79d5f
user: briggs <briggs%NetBSD.org@localhost>
date: Wed Apr 10 04:36:20 2002 +0000
description:
bus_dma(9) pulled pretty much verbatim from next68k.
diffstat:
sys/arch/m68k/include/Makefile | 4 +-
sys/arch/m68k/include/bus_dma.h | 259 ++++++++++++++
sys/arch/m68k/m68k/bus_dma.c | 723 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 984 insertions(+), 2 deletions(-)
diffs (truncated from 1006 to 300 lines):
diff -r 9466bbe1e575 -r 1197f9c79d5f sys/arch/m68k/include/Makefile
--- a/sys/arch/m68k/include/Makefile Wed Apr 10 04:21:27 2002 +0000
+++ b/sys/arch/m68k/include/Makefile Wed Apr 10 04:36:20 2002 +0000
@@ -1,10 +1,10 @@
-# $NetBSD: Makefile,v 1.15 2001/11/28 13:14:13 kleink Exp $
+# $NetBSD: Makefile,v 1.16 2002/04/10 04:36:20 briggs Exp $
KDIR= /sys/arch/m68k/include
INCSDIR= /usr/include/m68k
INCS= ansi.h aout_machdep.h asm.h asm_single.h \
- bswap.h byte_swap.h \
+ bswap.h bus_dma.h byte_swap.h \
cacheops.h cacheops_20.h cacheops_30.h cacheops_40.h cacheops_60.h \
cdefs.h cpu.h \
db_machdep.h \
diff -r 9466bbe1e575 -r 1197f9c79d5f sys/arch/m68k/include/bus_dma.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/m68k/include/bus_dma.h Wed Apr 10 04:36:20 2002 +0000
@@ -0,0 +1,259 @@
+/* $NetBSD: bus_dma.h,v 1.1 2002/04/10 04:36:20 briggs Exp $ */
+
+/*
+ * This file was extracted from from alpha/include/bus.h
+ * and should probably be resynced when needed.
+ * Darrin B. Jewell <dbj%netbsd.org@localhost> Sat Jul 31 06:11:33 UTC 1999
+ * original cvs id: NetBSD: bus.h,v 1.29 1999/06/18 04:49:24 cgd Exp
+ */
+
+
+/*-
+ * Copyright (c) 1997, 1998, 2001 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.
+ */
+
+/*
+ * Copyright (c) 1996 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Chris G. Demetriou
+ *
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ * Software Distribution Coordinator or Software.Distribution%CS.CMU.EDU@localhost
+ * School of Computer Science
+ * Carnegie Mellon University
+ * Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+#ifndef _M68K_BUS_DMA_H_
+#define _M68K_BUS_DMA_H_
+
+/*
+ * Bus DMA methods.
+ */
+
+/*
+ * Flags used in various bus DMA methods.
+ */
+#define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */
+#define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */
+#define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */
+#define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */
+#define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */
+#define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */
+#define BUS_DMA_BUS2 0x020
+#define BUS_DMA_BUS3 0x040
+#define BUS_DMA_BUS4 0x080
+#define BUS_DMA_READ 0x100 /* mapping is device -> memory only */
+#define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */
+
+/* Forwards needed by prototypes below. */
+struct mbuf;
+struct uio;
+
+/*
+ * Operations performed by bus_dmamap_sync().
+ */
+#define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
+#define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
+#define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
+#define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
+
+typedef struct m68k_bus_dma_tag *bus_dma_tag_t;
+typedef struct m68k_bus_dmamap *bus_dmamap_t;
+
+/*
+ * bus_dma_segment_t
+ *
+ * Describes a single contiguous DMA transaction. Values
+ * are suitable for programming into DMA registers.
+ */
+struct m68k_bus_dma_segment {
+ bus_addr_t ds_addr; /* DMA address */
+ bus_size_t ds_len; /* length of transfer */
+};
+typedef struct m68k_bus_dma_segment bus_dma_segment_t;
+
+/*
+ * bus_dma_tag_t
+ *
+ * A machine-dependent opaque type describing the implementation of
+ * DMA for a given bus.
+ */
+struct m68k_bus_dma_tag {
+ void *_cookie; /* cookie used in the guts */
+
+ /*
+ * Some chipsets have a built-in boundary constraint, independent
+ * of what the device requests. This allows that boundary to
+ * be specified. If the device has a more restrictive constraint,
+ * the map will use that, otherwise this boundary will be used.
+ * This value is ignored if 0.
+ */
+ bus_size_t _boundary;
+
+ /*
+ * DMA mapping methods.
+ */
+ int (*_dmamap_create) __P((bus_dma_tag_t, bus_size_t, int,
+ bus_size_t, bus_size_t, int, bus_dmamap_t *));
+ void (*_dmamap_destroy) __P((bus_dma_tag_t, bus_dmamap_t));
+ int (*_dmamap_load) __P((bus_dma_tag_t, bus_dmamap_t, void *,
+ bus_size_t, struct proc *, int));
+ int (*_dmamap_load_mbuf) __P((bus_dma_tag_t, bus_dmamap_t,
+ struct mbuf *, int));
+ int (*_dmamap_load_uio) __P((bus_dma_tag_t, bus_dmamap_t,
+ struct uio *, int));
+ int (*_dmamap_load_raw) __P((bus_dma_tag_t, bus_dmamap_t,
+ bus_dma_segment_t *, int, bus_size_t, int));
+ void (*_dmamap_unload) __P((bus_dma_tag_t, bus_dmamap_t));
+ void (*_dmamap_sync) __P((bus_dma_tag_t, bus_dmamap_t,
+ bus_addr_t, bus_size_t, int));
+
+ /*
+ * DMA memory utility functions.
+ */
+ int (*_dmamem_alloc) __P((bus_dma_tag_t, bus_size_t, bus_size_t,
+ bus_size_t, bus_dma_segment_t *, int, int *, int));
+ void (*_dmamem_free) __P((bus_dma_tag_t,
+ bus_dma_segment_t *, int));
+ int (*_dmamem_map) __P((bus_dma_tag_t, bus_dma_segment_t *,
+ int, size_t, caddr_t *, int));
+ void (*_dmamem_unmap) __P((bus_dma_tag_t, caddr_t, size_t));
+ paddr_t (*_dmamem_mmap) __P((bus_dma_tag_t, bus_dma_segment_t *,
+ int, off_t, int, int));
+};
+
+#define bus_dmamap_create(t, s, n, m, b, f, p) \
+ (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p))
+#define bus_dmamap_destroy(t, p) \
+ (*(t)->_dmamap_destroy)((t), (p))
+#define bus_dmamap_load(t, m, b, s, p, f) \
+ (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f))
+#define bus_dmamap_load_mbuf(t, m, b, f) \
+ (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f))
+#define bus_dmamap_load_uio(t, m, u, f) \
+ (*(t)->_dmamap_load_uio)((t), (m), (u), (f))
+#define bus_dmamap_load_raw(t, m, sg, n, s, f) \
+ (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f))
+#define bus_dmamap_unload(t, p) \
+ (*(t)->_dmamap_unload)((t), (p))
+#define bus_dmamap_sync(t, p, o, l, ops) \
+ (*(t)->_dmamap_sync)((t), (p), (o), (l), (ops))
+#define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \
+ (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f))
+#define bus_dmamem_free(t, sg, n) \
+ (*(t)->_dmamem_free)((t), (sg), (n))
+#define bus_dmamem_map(t, sg, n, s, k, f) \
+ (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f))
+#define bus_dmamem_unmap(t, k, s) \
+ (*(t)->_dmamem_unmap)((t), (k), (s))
+#define bus_dmamem_mmap(t, sg, n, o, p, f) \
+ (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f))
+
+/*
+ * bus_dmamap_t
+ *
+ * Describes a DMA mapping.
+ */
+struct m68k_bus_dmamap {
+ /*
+ * PRIVATE MEMBERS: not for use by machine-independent code.
+ */
+ bus_size_t _dm_size; /* largest DMA transfer mappable */
+ int _dm_segcnt; /* number of segs this map can map */
+ bus_size_t _dm_maxsegsz; /* largest possible segment */
+ bus_size_t _dm_boundary; /* don't cross this */
+ int _dm_flags; /* misc. flags */
+
+ /* Machine dependant fields: */
+ bus_size_t dm_xfer_len; /* length of successful transfer */
+
+ /*
+ * PUBLIC MEMBERS: these are used by machine-independent code.
+ */
+ bus_size_t dm_mapsize; /* size of the mapping */
+ int dm_nsegs; /* # valid segments in mapping */
+ bus_dma_segment_t dm_segs[1]; /* segments; variable length */
+
+};
+
+#ifdef _M68K_BUS_DMA_PRIVATE
+int _bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, bus_size_t,
+ bus_size_t, int, bus_dmamap_t *));
+void _bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t));
+
+int _bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t,
+ void *, bus_size_t, struct proc *, int));
+int _bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t,
+ bus_dmamap_t, struct mbuf *, int));
+int _bus_dmamap_load_uio_direct __P((bus_dma_tag_t,
+ bus_dmamap_t, struct uio *, int));
+int _bus_dmamap_load_raw_direct __P((bus_dma_tag_t,
+ bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int));
+
+void _bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t));
+void _bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
+ bus_size_t, int));
+
+int _bus_dmamem_alloc __P((bus_dma_tag_t tag, bus_size_t size,
+ bus_size_t alignment, bus_size_t boundary,
+ bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags));
+void _bus_dmamem_free __P((bus_dma_tag_t tag, bus_dma_segment_t *segs,
+ int nsegs));
+int _bus_dmamem_map __P((bus_dma_tag_t tag, bus_dma_segment_t *segs,
+ int nsegs, size_t size, caddr_t *kvap, int flags));
+void _bus_dmamem_unmap __P((bus_dma_tag_t tag, caddr_t kva,
+ size_t size));
+paddr_t _bus_dmamem_mmap __P((bus_dma_tag_t tag, bus_dma_segment_t *segs,
+ int nsegs, off_t off, int prot, int flags));
+#endif /* _M68K_BUS_DMA_PRIVATE */
+
+#endif /* _M68K_BUS_DMA_H_ */
diff -r 9466bbe1e575 -r 1197f9c79d5f sys/arch/m68k/m68k/bus_dma.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/m68k/m68k/bus_dma.c Wed Apr 10 04:36:20 2002 +0000
@@ -0,0 +1,723 @@
+/* $NetBSD: bus_dma.c,v 1.1 2002/04/10 04:36:20 briggs Exp $ */
+
+/*
+ * This file was taken from from alpha/common/bus_dma.c
+ * should probably be re-synced when needed.
+ * Darrin B. Jewell <dbj%netbsd.org@localhost> Sat Jul 31 06:11:33 UTC 1999
+ * original cvs id: NetBSD: bus_dma.c,v 1.31 1999/07/08 18:05:23 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.
+ *
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