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[src/trunk]: src/sys/arch/i386 next step in getting machdep.c maintainable - ...
details: https://anonhg.NetBSD.org/src/rev/1ce7bf54d5e2
branches: trunk
changeset: 481353:1ce7bf54d5e2
user: drochner <drochner%NetBSD.org@localhost>
date: Wed Jan 26 18:47:59 2000 +0000
description:
next step in getting machdep.c maintainable - put bus_space related
stuff into a separate file
diffstat:
sys/arch/i386/conf/files.i386 | 3 +-
sys/arch/i386/i386/bus_machdep.c | 958 +++++++++++++++++++++++++++++++++++++++
sys/arch/i386/include/cpu.h | 6 +-
3 files changed, 965 insertions(+), 2 deletions(-)
diffs (truncated from 999 to 300 lines):
diff -r c14aaf1af34d -r 1ce7bf54d5e2 sys/arch/i386/conf/files.i386
--- a/sys/arch/i386/conf/files.i386 Wed Jan 26 17:08:41 2000 +0000
+++ b/sys/arch/i386/conf/files.i386 Wed Jan 26 18:47:59 2000 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.i386,v 1.145 1999/12/21 12:34:13 drochner Exp $
+# $NetBSD: files.i386,v 1.146 2000/01/26 18:47:59 drochner Exp $
#
# new style config file for i386 architecture
#
@@ -42,6 +42,7 @@
PCIINTR_DEBUG PCIBIOS_BUS_FIXUP
file arch/i386/i386/autoconf.c
+file arch/i386/i386/bus_machdep.c
file arch/i386/i386/conf.c
file arch/i386/i386/consinit.c
file arch/i386/i386/db_dbgreg.s ddb
diff -r c14aaf1af34d -r 1ce7bf54d5e2 sys/arch/i386/i386/bus_machdep.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/i386/i386/bus_machdep.c Wed Jan 26 18:47:59 2000 +0000
@@ -0,0 +1,958 @@
+/* $NetBSD: bus_machdep.c,v 1.1 2000/01/26 18:48:00 drochner Exp $ */
+
+/*-
+ * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Charles M. Hannum and 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.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/extent.h>
+
+#include <vm/vm.h>
+#include <vm/vm_kern.h>
+
+#define _I386_BUS_DMA_PRIVATE
+#include <machine/bus.h>
+
+#include <dev/isa/isareg.h>
+#include <machine/isa_machdep.h>
+
+/*
+ * Extent maps to manage I/O and memory space. Allocate
+ * storage for 8 regions in each, initially. Later, ioport_malloc_safe
+ * will indicate that it's safe to use malloc() to dynamically allocate
+ * region descriptors.
+ *
+ * N.B. At least two regions are _always_ allocated from the iomem
+ * extent map; (0 -> ISA hole) and (end of ISA hole -> end of RAM).
+ *
+ * The extent maps are not static! Machine-dependent ISA and EISA
+ * routines need access to them for bus address space allocation.
+ */
+static long ioport_ex_storage[EXTENT_FIXED_STORAGE_SIZE(8) / sizeof(long)];
+static long iomem_ex_storage[EXTENT_FIXED_STORAGE_SIZE(8) / sizeof(long)];
+struct extent *ioport_ex;
+struct extent *iomem_ex;
+static int ioport_malloc_safe;
+
+int i386_mem_add_mapping __P((bus_addr_t, bus_size_t,
+ int, bus_space_handle_t *));
+
+int _bus_dmamap_load_buffer __P((bus_dma_tag_t, bus_dmamap_t, void *,
+ bus_size_t, struct proc *, int, paddr_t *, int *, int));
+
+void
+i386_bus_space_init()
+{
+ /*
+ * Initialize the I/O port and I/O mem extent maps.
+ * Note: we don't have to check the return value since
+ * creation of a fixed extent map will never fail (since
+ * descriptor storage has already been allocated).
+ *
+ * N.B. The iomem extent manages _all_ physical addresses
+ * on the machine. When the amount of RAM is found, the two
+ * extents of RAM are allocated from the map (0 -> ISA hole
+ * and end of ISA hole -> end of RAM).
+ */
+ ioport_ex = extent_create("ioport", 0x0, 0xffff, M_DEVBUF,
+ (caddr_t)ioport_ex_storage, sizeof(ioport_ex_storage),
+ EX_NOCOALESCE|EX_NOWAIT);
+ iomem_ex = extent_create("iomem", 0x0, 0xffffffff, M_DEVBUF,
+ (caddr_t)iomem_ex_storage, sizeof(iomem_ex_storage),
+ EX_NOCOALESCE|EX_NOWAIT);
+}
+
+void
+i386_bus_space_mallocok()
+{
+
+ ioport_malloc_safe = 1;
+}
+
+int
+i386_memio_map(t, bpa, size, flags, bshp)
+ bus_space_tag_t t;
+ bus_addr_t bpa;
+ bus_size_t size;
+ int flags;
+ bus_space_handle_t *bshp;
+{
+ int error;
+ struct extent *ex;
+
+ /*
+ * Pick the appropriate extent map.
+ */
+ if (t == I386_BUS_SPACE_IO) {
+ if (flags & BUS_SPACE_MAP_LINEAR)
+ return (EOPNOTSUPP);
+ ex = ioport_ex;
+ } else if (t == I386_BUS_SPACE_MEM)
+ ex = iomem_ex;
+ else
+ panic("i386_memio_map: bad bus space tag");
+
+ /*
+ * Before we go any further, let's make sure that this
+ * region is available.
+ */
+ error = extent_alloc_region(ex, bpa, size,
+ EX_NOWAIT | (ioport_malloc_safe ? EX_MALLOCOK : 0));
+ if (error)
+ return (error);
+
+ /*
+ * For I/O space, that's all she wrote.
+ */
+ if (t == I386_BUS_SPACE_IO) {
+ *bshp = bpa;
+ return (0);
+ }
+
+ if (bpa >= IOM_BEGIN && (bpa + size) <= IOM_END) {
+ *bshp = (bus_space_handle_t)ISA_HOLE_VADDR(bpa);
+ return(0);
+ }
+
+ /*
+ * For memory space, map the bus physical address to
+ * a kernel virtual address.
+ */
+ error = i386_mem_add_mapping(bpa, size,
+ (flags & BUS_SPACE_MAP_CACHEABLE) != 0, bshp);
+ if (error) {
+ if (extent_free(ex, bpa, size, EX_NOWAIT |
+ (ioport_malloc_safe ? EX_MALLOCOK : 0))) {
+ printf("i386_memio_map: pa 0x%lx, size 0x%lx\n",
+ bpa, size);
+ printf("i386_memio_map: can't free region\n");
+ }
+ }
+
+ return (error);
+}
+
+int
+_i386_memio_map(t, bpa, size, flags, bshp)
+ bus_space_tag_t t;
+ bus_addr_t bpa;
+ bus_size_t size;
+ int flags;
+ bus_space_handle_t *bshp;
+{
+
+ /*
+ * For I/O space, just fill in the handle.
+ */
+ if (t == I386_BUS_SPACE_IO) {
+ if (flags & BUS_SPACE_MAP_LINEAR)
+ return (EOPNOTSUPP);
+ *bshp = bpa;
+ return (0);
+ }
+
+ /*
+ * For memory space, map the bus physical address to
+ * a kernel virtual address.
+ */
+ return (i386_mem_add_mapping(bpa, size,
+ (flags & BUS_SPACE_MAP_CACHEABLE) != 0, bshp));
+}
+
+int
+i386_memio_alloc(t, rstart, rend, size, alignment, boundary, flags,
+ bpap, bshp)
+ bus_space_tag_t t;
+ bus_addr_t rstart, rend;
+ bus_size_t size, alignment, boundary;
+ int flags;
+ bus_addr_t *bpap;
+ bus_space_handle_t *bshp;
+{
+ struct extent *ex;
+ u_long bpa;
+ int error;
+
+ /*
+ * Pick the appropriate extent map.
+ */
+ if (t == I386_BUS_SPACE_IO) {
+ if (flags & BUS_SPACE_MAP_LINEAR)
+ return (EOPNOTSUPP);
+ ex = ioport_ex;
+ } else if (t == I386_BUS_SPACE_MEM)
+ ex = iomem_ex;
+ else
+ panic("i386_memio_alloc: bad bus space tag");
+
+ /*
+ * Sanity check the allocation against the extent's boundaries.
+ */
+ if (rstart < ex->ex_start || rend > ex->ex_end)
+ panic("i386_memio_alloc: bad region start/end");
+
+ /*
+ * Do the requested allocation.
+ */
+ error = extent_alloc_subregion(ex, rstart, rend, size, alignment,
+ boundary,
+ EX_FAST | EX_NOWAIT | (ioport_malloc_safe ? EX_MALLOCOK : 0),
+ &bpa);
+
+ if (error)
+ return (error);
+
+ /*
+ * For I/O space, that's all she wrote.
+ */
+ if (t == I386_BUS_SPACE_IO) {
+ *bshp = *bpap = bpa;
+ return (0);
+ }
+
+ /*
+ * For memory space, map the bus physical address to
+ * a kernel virtual address.
+ */
+ error = i386_mem_add_mapping(bpa, size,
+ (flags & BUS_SPACE_MAP_CACHEABLE) != 0, bshp);
+ if (error) {
+ if (extent_free(iomem_ex, bpa, size, EX_NOWAIT |
+ (ioport_malloc_safe ? EX_MALLOCOK : 0))) {
+ printf("i386_memio_alloc: pa 0x%lx, size 0x%lx\n",
+ bpa, size);
+ printf("i386_memio_alloc: can't free region\n");
+ }
+ }
+
+ *bpap = bpa;
+
+ return (error);
+}
+
+int
+i386_mem_add_mapping(bpa, size, cacheable, bshp)
+ bus_addr_t bpa;
+ bus_size_t size;
+ int cacheable;
+ bus_space_handle_t *bshp;
+{
+ u_long pa, endpa;
+ vaddr_t va;
+ pt_entry_t *pte;
+
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