BUS_SPACE(9): Use FreeBSD files for i386 arch

1 files changed, 1091 insertions, 0 deletions

diff --git a/freebsd/sys/x86/include/machine/bus.h b/freebsd/sys/x86/include/machine/bus.h
new file mode 100644
index 00000000..58e98769
--- /dev/null
+++ b/freebsd/sys/x86/include/machine/bus.h
@@ -0,0 +1,1091 @@
+/*-
+ * Copyright (c) KATO Takenori, 1999.
+ *
+ * All rights reserved.  Unpublished rights reserved under the copyright
+ * laws of Japan.
+ *
+ * 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 as
+ *    the first lines of this file unmodified.
+ * 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. 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.
+ *
+ * $FreeBSD$
+ */
+
+/*	$NetBSD: bus.h,v 1.12 1997/10/01 08:25:15 fvdl Exp $	*/
+
+/*-
+ * Copyright (c) 1996, 1997 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.
+ *
+ * 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 Charles M. Hannum.  All rights reserved.
+ * 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.
+ */
+
+#ifndef _X86_BUS_H_
+#define _X86_BUS_H_
+
+#include <machine/_bus.h>
+#include <machine/cpufunc.h>
+
+#ifndef __GNUCLIKE_ASM
+# ifndef lint
+#  error "no assembler code for your compiler"
+# endif
+#endif
+
+/*
+ * Values for the x86 bus space tag, not to be used directly by MI code.
+ */
+#define	X86_BUS_SPACE_IO	0	/* space is i/o space */
+#define	X86_BUS_SPACE_MEM	1	/* space is mem space */
+
+#define BUS_SPACE_MAXSIZE_24BIT	0xFFFFFF
+#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
+#define BUS_SPACE_MAXSIZE	0xFFFFFFFF
+#define BUS_SPACE_MAXADDR_24BIT	0xFFFFFF
+#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
+#if defined(__amd64__) || defined(PAE)
+#define BUS_SPACE_MAXADDR	0xFFFFFFFFFFFFFFFFULL
+#else
+#define BUS_SPACE_MAXADDR	0xFFFFFFFF
+#endif
+
+#define BUS_SPACE_UNRESTRICTED	(~0)
+
+/*
+ * Map a region of device bus space into CPU virtual address space.
+ */
+
+static __inline int bus_space_map(bus_space_tag_t t, bus_addr_t addr,
+				  bus_size_t size, int flags,
+				  bus_space_handle_t *bshp);
+
+static __inline int
+bus_space_map(bus_space_tag_t t __unused, bus_addr_t addr,
+	      bus_size_t size __unused, int flags __unused,
+	      bus_space_handle_t *bshp)
+{
+
+	*bshp = addr;
+	return (0);
+}
+
+/*
+ * Unmap a region of device bus space.
+ */
+
+static __inline void bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh,
+				     bus_size_t size);
+
+static __inline void
+bus_space_unmap(bus_space_tag_t t __unused, bus_space_handle_t bsh __unused,
+		bus_size_t size __unused)
+{
+}
+
+/*
+ * Get a new handle for a subregion of an already-mapped area of bus space.
+ */
+
+static __inline int bus_space_subregion(bus_space_tag_t t,
+					bus_space_handle_t bsh,
+					bus_size_t offset, bus_size_t size,
+					bus_space_handle_t *nbshp);
+
+static __inline int
+bus_space_subregion(bus_space_tag_t t __unused, bus_space_handle_t bsh,
+		    bus_size_t offset, bus_size_t size __unused,
+		    bus_space_handle_t *nbshp)
+{
+
+	*nbshp = bsh + offset;
+	return (0);
+}
+
+/*
+ * Allocate a region of memory that is accessible to devices in bus space.
+ */
+
+int	bus_space_alloc(bus_space_tag_t t, bus_addr_t rstart,
+			bus_addr_t rend, bus_size_t size, bus_size_t align,
+			bus_size_t boundary, int flags, bus_addr_t *addrp,
+			bus_space_handle_t *bshp);
+
+/*
+ * Free a region of bus space accessible memory.
+ */
+
+static __inline void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh,
+				    bus_size_t size);
+
+static __inline void
+bus_space_free(bus_space_tag_t t __unused, bus_space_handle_t bsh __unused,
+	       bus_size_t size __unused)
+{
+}
+
+
+/*
+ * Read a 1, 2, 4, or 8 byte quantity from bus space
+ * described by tag/handle/offset.
+ */
+static __inline u_int8_t bus_space_read_1(bus_space_tag_t tag,
+					  bus_space_handle_t handle,
+					  bus_size_t offset);
+
+static __inline u_int16_t bus_space_read_2(bus_space_tag_t tag,
+					   bus_space_handle_t handle,
+					   bus_size_t offset);
+
+static __inline u_int32_t bus_space_read_4(bus_space_tag_t tag,
+					   bus_space_handle_t handle,
+					   bus_size_t offset);
+
+static __inline u_int8_t
+bus_space_read_1(bus_space_tag_t tag, bus_space_handle_t handle,
+		 bus_size_t offset)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		return (inb(handle + offset));
+	return (*(volatile u_int8_t *)(handle + offset));
+}
+
+static __inline u_int16_t
+bus_space_read_2(bus_space_tag_t tag, bus_space_handle_t handle,
+		 bus_size_t offset)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		return (inw(handle + offset));
+	return (*(volatile u_int16_t *)(handle + offset));
+}
+
+static __inline u_int32_t
+bus_space_read_4(bus_space_tag_t tag, bus_space_handle_t handle,
+		 bus_size_t offset)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		return (inl(handle + offset));
+	return (*(volatile u_int32_t *)(handle + offset));
+}
+
+#if 0	/* Cause a link error for bus_space_read_8 */
+#define	bus_space_read_8(t, h, o)	!!! bus_space_read_8 unimplemented !!!
+#endif
+
+/*
+ * Read `count' 1, 2, 4, or 8 byte quantities from bus space
+ * described by tag/handle/offset and copy into buffer provided.
+ */
+static __inline void bus_space_read_multi_1(bus_space_tag_t tag,
+					    bus_space_handle_t bsh,
+					    bus_size_t offset, u_int8_t *addr,
+					    size_t count);
+
+static __inline void bus_space_read_multi_2(bus_space_tag_t tag,
+					    bus_space_handle_t bsh,
+					    bus_size_t offset, u_int16_t *addr,
+					    size_t count);
+
+static __inline void bus_space_read_multi_4(bus_space_tag_t tag,
+					    bus_space_handle_t bsh,
+					    bus_size_t offset, u_int32_t *addr,
+					    size_t count);
+
+static __inline void
+bus_space_read_multi_1(bus_space_tag_t tag, bus_space_handle_t bsh,
+		       bus_size_t offset, u_int8_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		insb(bsh + offset, addr, count);
+	else {
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	movb (%2),%%al				\n\
+			stosb					\n\
+			loop 1b"				:
+		    "=D" (addr), "=c" (count)			:
+		    "r" (bsh + offset), "0" (addr), "1" (count)	:
+		    "%eax", "memory");
+#endif
+	}
+}
+
+static __inline void
+bus_space_read_multi_2(bus_space_tag_t tag, bus_space_handle_t bsh,
+		       bus_size_t offset, u_int16_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		insw(bsh + offset, addr, count);
+	else {
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	movw (%2),%%ax				\n\
+			stosw					\n\
+			loop 1b"				:
+		    "=D" (addr), "=c" (count)			:
+		    "r" (bsh + offset), "0" (addr), "1" (count)	:
+		    "%eax", "memory");
+#endif
+	}
+}
+
+static __inline void
+bus_space_read_multi_4(bus_space_tag_t tag, bus_space_handle_t bsh,
+		       bus_size_t offset, u_int32_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		insl(bsh + offset, addr, count);
+	else {
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	movl (%2),%%eax				\n\
+			stosl					\n\
+			loop 1b"				:
+		    "=D" (addr), "=c" (count)			:
+		    "r" (bsh + offset), "0" (addr), "1" (count)	:
+		    "%eax", "memory");
+#endif
+	}
+}
+
+#if 0	/* Cause a link error for bus_space_read_multi_8 */
+#define	bus_space_read_multi_8	!!! bus_space_read_multi_8 unimplemented !!!
+#endif
+
+/*
+ * Read `count' 1, 2, 4, or 8 byte quantities from bus space
+ * described by tag/handle and starting at `offset' and copy into
+ * buffer provided.
+ */
+static __inline void bus_space_read_region_1(bus_space_tag_t tag,
+					     bus_space_handle_t bsh,
+					     bus_size_t offset, u_int8_t *addr,
+					     size_t count);
+
+static __inline void bus_space_read_region_2(bus_space_tag_t tag,
+					     bus_space_handle_t bsh,
+					     bus_size_t offset, u_int16_t *addr,
+					     size_t count);
+
+static __inline void bus_space_read_region_4(bus_space_tag_t tag,
+					     bus_space_handle_t bsh,
+					     bus_size_t offset, u_int32_t *addr,
+					     size_t count);
+
+
+static __inline void
+bus_space_read_region_1(bus_space_tag_t tag, bus_space_handle_t bsh,
+			bus_size_t offset, u_int8_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO) {
+		int _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	inb %w2,%%al				\n\
+			stosb					\n\
+			incl %2					\n\
+			loop 1b"				:
+		    "=D" (addr), "=c" (count), "=d" (_port_)	:
+		    "0" (addr), "1" (count), "2" (_port_)	:
+		    "%eax", "memory", "cc");
+#endif
+	} else {
+		bus_space_handle_t _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+			repne					\n\
+			movsb"					:
+		    "=D" (addr), "=c" (count), "=S" (_port_)	:
+		    "0" (addr), "1" (count), "2" (_port_)	:
+		    "memory", "cc");
+#endif
+	}
+}
+
+static __inline void
+bus_space_read_region_2(bus_space_tag_t tag, bus_space_handle_t bsh,
+			bus_size_t offset, u_int16_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO) {
+		int _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	inw %w2,%%ax				\n\
+			stosw					\n\
+			addl $2,%2				\n\
+			loop 1b"				:
+		    "=D" (addr), "=c" (count), "=d" (_port_)	:
+		    "0" (addr), "1" (count), "2" (_port_)	:
+		    "%eax", "memory", "cc");
+#endif
+	} else {
+		bus_space_handle_t _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+			repne					\n\
+			movsw"					:
+		    "=D" (addr), "=c" (count), "=S" (_port_)	:
+		    "0" (addr), "1" (count), "2" (_port_)	:
+		    "memory", "cc");
+#endif
+	}
+}
+
+static __inline void
+bus_space_read_region_4(bus_space_tag_t tag, bus_space_handle_t bsh,
+			bus_size_t offset, u_int32_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO) {
+		int _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	inl %w2,%%eax				\n\
+			stosl					\n\
+			addl $4,%2				\n\
+			loop 1b"				:
+		    "=D" (addr), "=c" (count), "=d" (_port_)	:
+		    "0" (addr), "1" (count), "2" (_port_)	:
+		    "%eax", "memory", "cc");
+#endif
+	} else {
+		bus_space_handle_t _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+			repne					\n\
+			movsl"					:
+		    "=D" (addr), "=c" (count), "=S" (_port_)	:
+		    "0" (addr), "1" (count), "2" (_port_)	:
+		    "memory", "cc");
+#endif
+	}
+}
+
+#if 0	/* Cause a link error for bus_space_read_region_8 */
+#define	bus_space_read_region_8	!!! bus_space_read_region_8 unimplemented !!!
+#endif
+
+/*
+ * Write the 1, 2, 4, or 8 byte value `value' to bus space
+ * described by tag/handle/offset.
+ */
+
+static __inline void bus_space_write_1(bus_space_tag_t tag,
+				       bus_space_handle_t bsh,
+				       bus_size_t offset, u_int8_t value);
+
+static __inline void bus_space_write_2(bus_space_tag_t tag,
+				       bus_space_handle_t bsh,
+				       bus_size_t offset, u_int16_t value);
+
+static __inline void bus_space_write_4(bus_space_tag_t tag,
+				       bus_space_handle_t bsh,
+				       bus_size_t offset, u_int32_t value);
+
+static __inline void
+bus_space_write_1(bus_space_tag_t tag, bus_space_handle_t bsh,
+		       bus_size_t offset, u_int8_t value)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		outb(bsh + offset, value);
+	else
+		*(volatile u_int8_t *)(bsh + offset) = value;
+}
+
+static __inline void
+bus_space_write_2(bus_space_tag_t tag, bus_space_handle_t bsh,
+		       bus_size_t offset, u_int16_t value)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		outw(bsh + offset, value);
+	else
+		*(volatile u_int16_t *)(bsh + offset) = value;
+}
+
+static __inline void
+bus_space_write_4(bus_space_tag_t tag, bus_space_handle_t bsh,
+		       bus_size_t offset, u_int32_t value)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		outl(bsh + offset, value);
+	else
+		*(volatile u_int32_t *)(bsh + offset) = value;
+}
+
+#if 0	/* Cause a link error for bus_space_write_8 */
+#define	bus_space_write_8	!!! bus_space_write_8 not implemented !!!
+#endif
+
+/*
+ * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
+ * provided to bus space described by tag/handle/offset.
+ */
+
+static __inline void bus_space_write_multi_1(bus_space_tag_t tag,
+					     bus_space_handle_t bsh,
+					     bus_size_t offset,
+					     const u_int8_t *addr,
+					     size_t count);
+static __inline void bus_space_write_multi_2(bus_space_tag_t tag,
+					     bus_space_handle_t bsh,
+					     bus_size_t offset,
+					     const u_int16_t *addr,
+					     size_t count);
+
+static __inline void bus_space_write_multi_4(bus_space_tag_t tag,
+					     bus_space_handle_t bsh,
+					     bus_size_t offset,
+					     const u_int32_t *addr,
+					     size_t count);
+
+static __inline void
+bus_space_write_multi_1(bus_space_tag_t tag, bus_space_handle_t bsh,
+			bus_size_t offset, const u_int8_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		outsb(bsh + offset, addr, count);
+	else {
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	lodsb					\n\
+			movb %%al,(%2)				\n\
+			loop 1b"				:
+		    "=S" (addr), "=c" (count)			:
+		    "r" (bsh + offset), "0" (addr), "1" (count)	:
+		    "%eax", "memory", "cc");
+#endif
+	}
+}
+
+static __inline void
+bus_space_write_multi_2(bus_space_tag_t tag, bus_space_handle_t bsh,
+			bus_size_t offset, const u_int16_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		outsw(bsh + offset, addr, count);
+	else {
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	lodsw					\n\
+			movw %%ax,(%2)				\n\
+			loop 1b"				:
+		    "=S" (addr), "=c" (count)			:
+		    "r" (bsh + offset), "0" (addr), "1" (count)	:
+		    "%eax", "memory", "cc");
+#endif
+	}
+}
+
+static __inline void
+bus_space_write_multi_4(bus_space_tag_t tag, bus_space_handle_t bsh,
+			bus_size_t offset, const u_int32_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO)
+		outsl(bsh + offset, addr, count);
+	else {
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	lodsl					\n\
+			movl %%eax,(%2)				\n\
+			loop 1b"				:
+		    "=S" (addr), "=c" (count)			:
+		    "r" (bsh + offset), "0" (addr), "1" (count)	:
+		    "%eax", "memory", "cc");
+#endif
+	}
+}
+
+#if 0	/* Cause a link error for bus_space_write_multi_8 */
+#define	bus_space_write_multi_8(t, h, o, a, c)				\
+			!!! bus_space_write_multi_8 unimplemented !!!
+#endif
+
+/*
+ * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
+ * to bus space described by tag/handle starting at `offset'.
+ */
+
+static __inline void bus_space_write_region_1(bus_space_tag_t tag,
+					      bus_space_handle_t bsh,
+					      bus_size_t offset,
+					      const u_int8_t *addr,
+					      size_t count);
+static __inline void bus_space_write_region_2(bus_space_tag_t tag,
+					      bus_space_handle_t bsh,
+					      bus_size_t offset,
+					      const u_int16_t *addr,
+					      size_t count);
+static __inline void bus_space_write_region_4(bus_space_tag_t tag,
+					      bus_space_handle_t bsh,
+					      bus_size_t offset,
+					      const u_int32_t *addr,
+					      size_t count);
+
+static __inline void
+bus_space_write_region_1(bus_space_tag_t tag, bus_space_handle_t bsh,
+			 bus_size_t offset, const u_int8_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO) {
+		int _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	lodsb					\n\
+			outb %%al,%w0				\n\
+			incl %0					\n\
+			loop 1b"				:
+		    "=d" (_port_), "=S" (addr), "=c" (count)	:
+		    "0" (_port_), "1" (addr), "2" (count)	:
+		    "%eax", "memory", "cc");
+#endif
+	} else {
+		bus_space_handle_t _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+			repne					\n\
+			movsb"					:
+		    "=D" (_port_), "=S" (addr), "=c" (count)	:
+		    "0" (_port_), "1" (addr), "2" (count)	:
+		    "memory", "cc");
+#endif
+	}
+}
+
+static __inline void
+bus_space_write_region_2(bus_space_tag_t tag, bus_space_handle_t bsh,
+			 bus_size_t offset, const u_int16_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO) {
+		int _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	lodsw					\n\
+			outw %%ax,%w0				\n\
+			addl $2,%0				\n\
+			loop 1b"				:
+		    "=d" (_port_), "=S" (addr), "=c" (count)	:
+		    "0" (_port_), "1" (addr), "2" (count)	:
+		    "%eax", "memory", "cc");
+#endif
+	} else {
+		bus_space_handle_t _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+			repne					\n\
+			movsw"					:
+		    "=D" (_port_), "=S" (addr), "=c" (count)	:
+		    "0" (_port_), "1" (addr), "2" (count)	:
+		    "memory", "cc");
+#endif
+	}
+}
+
+static __inline void
+bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t bsh,
+			 bus_size_t offset, const u_int32_t *addr, size_t count)
+{
+
+	if (tag == X86_BUS_SPACE_IO) {
+		int _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+		1:	lodsl					\n\
+			outl %%eax,%w0				\n\
+			addl $4,%0				\n\
+			loop 1b"				:
+		    "=d" (_port_), "=S" (addr), "=c" (count)	:
+		    "0" (_port_), "1" (addr), "2" (count)	:
+		    "%eax", "memory", "cc");
+#endif
+	} else {
+		bus_space_handle_t _port_ = bsh + offset;
+#ifdef __GNUCLIKE_ASM
+		__asm __volatile("				\n\
+			cld					\n\
+			repne					\n\
+			movsl"					:
+		    "=D" (_port_), "=S" (addr), "=c" (count)	:
+		    "0" (_port_), "1" (addr), "2" (count)	:
+		    "memory", "cc");
+#endif
+	}
+}
+
+#if 0	/* Cause a link error for bus_space_write_region_8 */
+#define	bus_space_write_region_8					\
+			!!! bus_space_write_region_8 unimplemented !!!
+#endif
+
+/*
+ * Write the 1, 2, 4, or 8 byte value `val' to bus space described
+ * by tag/handle/offset `count' times.
+ */
+
+static __inline void bus_space_set_multi_1(bus_space_tag_t tag,
+					   bus_space_handle_t bsh,
+					   bus_size_t offset,
+					   u_int8_t value, size_t count);
+static __inline void bus_space_set_multi_2(bus_space_tag_t tag,
+					   bus_space_handle_t bsh,
+					   bus_size_t offset,
+					   u_int16_t value, size_t count);
+static __inline void bus_space_set_multi_4(bus_space_tag_t tag,
+					   bus_space_handle_t bsh,
+					   bus_size_t offset,
+					   u_int32_t value, size_t count);
+
+static __inline void
+bus_space_set_multi_1(bus_space_tag_t tag, bus_space_handle_t bsh,
+		      bus_size_t offset, u_int8_t value, size_t count)
+{
+	bus_space_handle_t addr = bsh + offset;
+
+	if (tag == X86_BUS_SPACE_IO)
+		while (count--)
+			outb(addr, value);
+	else
+		while (count--)
+			*(volatile u_int8_t *)(addr) = value;
+}
+
+static __inline void
+bus_space_set_multi_2(bus_space_tag_t tag, bus_space_handle_t bsh,
+		     bus_size_t offset, u_int16_t value, size_t count)
+{
+	bus_space_handle_t addr = bsh + offset;
+
+	if (tag == X86_BUS_SPACE_IO)
+		while (count--)
+			outw(addr, value);
+	else
+		while (count--)
+			*(volatile u_int16_t *)(addr) = value;
+}
+
+static __inline void
+bus_space_set_multi_4(bus_space_tag_t tag, bus_space_handle_t bsh,
+		      bus_size_t offset, u_int32_t value, size_t count)
+{
+	bus_space_handle_t addr = bsh + offset;
+
+	if (tag == X86_BUS_SPACE_IO)
+		while (count--)
+			outl(addr, value);
+	else
+		while (count--)
+			*(volatile u_int32_t *)(addr) = value;
+}
+
+#if 0	/* Cause a link error for bus_space_set_multi_8 */
+#define	bus_space_set_multi_8 !!! bus_space_set_multi_8 unimplemented !!!
+#endif
+
+/*
+ * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
+ * by tag/handle starting at `offset'.
+ */
+
+static __inline void bus_space_set_region_1(bus_space_tag_t tag,
+					    bus_space_handle_t bsh,
+					    bus_size_t offset, u_int8_t value,
+					    size_t count);
+static __inline void bus_space_set_region_2(bus_space_tag_t tag,
+					    bus_space_handle_t bsh,
+					    bus_size_t offset, u_int16_t value,
+					    size_t count);
+static __inline void bus_space_set_region_4(bus_space_tag_t tag,
+					    bus_space_handle_t bsh,
+					    bus_size_t offset, u_int32_t value,
+					    size_t count);
+
+static __inline void
+bus_space_set_region_1(bus_space_tag_t tag, bus_space_handle_t bsh,
+		       bus_size_t offset, u_int8_t value, size_t count)
+{
+	bus_space_handle_t addr = bsh + offset;
+
+	if (tag == X86_BUS_SPACE_IO)
+		for (; count != 0; count--, addr++)
+			outb(addr, value);
+	else
+		for (; count != 0; count--, addr++)
+			*(volatile u_int8_t *)(addr) = value;
+}
+
+static __inline void
+bus_space_set_region_2(bus_space_tag_t tag, bus_space_handle_t bsh,
+		       bus_size_t offset, u_int16_t value, size_t count)
+{
+	bus_space_handle_t addr = bsh + offset;
+
+	if (tag == X86_BUS_SPACE_IO)
+		for (; count != 0; count--, addr += 2)
+			outw(addr, value);
+	else
+		for (; count != 0; count--, addr += 2)
+			*(volatile u_int16_t *)(addr) = value;
+}
+
+static __inline void
+bus_space_set_region_4(bus_space_tag_t tag, bus_space_handle_t bsh,
+		       bus_size_t offset, u_int32_t value, size_t count)
+{
+	bus_space_handle_t addr = bsh + offset;
+
+	if (tag == X86_BUS_SPACE_IO)
+		for (; count != 0; count--, addr += 4)
+			outl(addr, value);
+	else
+		for (; count != 0; count--, addr += 4)
+			*(volatile u_int32_t *)(addr) = value;
+}
+
+#if 0	/* Cause a link error for bus_space_set_region_8 */
+#define	bus_space_set_region_8	!!! bus_space_set_region_8 unimplemented !!!
+#endif
+
+/*
+ * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
+ * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
+ */
+
+static __inline void bus_space_copy_region_1(bus_space_tag_t tag,
+					     bus_space_handle_t bsh1,
+					     bus_size_t off1,
+					     bus_space_handle_t bsh2,
+					     bus_size_t off2, size_t count);
+
+static __inline void bus_space_copy_region_2(bus_space_tag_t tag,
+					     bus_space_handle_t bsh1,
+					     bus_size_t off1,
+					     bus_space_handle_t bsh2,
+					     bus_size_t off2, size_t count);
+
+static __inline void bus_space_copy_region_4(bus_space_tag_t tag,
+					     bus_space_handle_t bsh1,
+					     bus_size_t off1,
+					     bus_space_handle_t bsh2,
+					     bus_size_t off2, size_t count);
+
+static __inline void
+bus_space_copy_region_1(bus_space_tag_t tag, bus_space_handle_t bsh1,
+			bus_size_t off1, bus_space_handle_t bsh2,
+			bus_size_t off2, size_t count)
+{
+	bus_space_handle_t addr1 = bsh1 + off1;
+	bus_space_handle_t addr2 = bsh2 + off2;
+
+	if (tag == X86_BUS_SPACE_IO) {
+		if (addr1 >= addr2) {
+			/* src after dest: copy forward */
+			for (; count != 0; count--, addr1++, addr2++)
+				outb(addr2, inb(addr1));
+		} else {
+			/* dest after src: copy backwards */
+			for (addr1 += (count - 1), addr2 += (count - 1);
+			    count != 0; count--, addr1--, addr2--)
+				outb(addr2, inb(addr1));
+		}
+	} else {
+		if (addr1 >= addr2) {
+			/* src after dest: copy forward */
+			for (; count != 0; count--, addr1++, addr2++)
+				*(volatile u_int8_t *)(addr2) =
+				    *(volatile u_int8_t *)(addr1);
+		} else {
+			/* dest after src: copy backwards */
+			for (addr1 += (count - 1), addr2 += (count - 1);
+			    count != 0; count--, addr1--, addr2--)
+				*(volatile u_int8_t *)(addr2) =
+				    *(volatile u_int8_t *)(addr1);
+		}
+	}
+}
+
+static __inline void
+bus_space_copy_region_2(bus_space_tag_t tag, bus_space_handle_t bsh1,
+			bus_size_t off1, bus_space_handle_t bsh2,
+			bus_size_t off2, size_t count)
+{
+	bus_space_handle_t addr1 = bsh1 + off1;
+	bus_space_handle_t addr2 = bsh2 + off2;
+
+	if (tag == X86_BUS_SPACE_IO) {
+		if (addr1 >= addr2) {
+			/* src after dest: copy forward */
+			for (; count != 0; count--, addr1 += 2, addr2 += 2)
+				outw(addr2, inw(addr1));
+		} else {
+			/* dest after src: copy backwards */
+			for (addr1 += 2 * (count - 1), addr2 += 2 * (count - 1);
+			    count != 0; count--, addr1 -= 2, addr2 -= 2)
+				outw(addr2, inw(addr1));
+		}
+	} else {
+		if (addr1 >= addr2) {
+			/* src after dest: copy forward */
+			for (; count != 0; count--, addr1 += 2, addr2 += 2)
+				*(volatile u_int16_t *)(addr2) =
+				    *(volatile u_int16_t *)(addr1);
+		} else {
+			/* dest after src: copy backwards */
+			for (addr1 += 2 * (count - 1), addr2 += 2 * (count - 1);
+			    count != 0; count--, addr1 -= 2, addr2 -= 2)
+				*(volatile u_int16_t *)(addr2) =
+				    *(volatile u_int16_t *)(addr1);
+		}
+	}
+}
+
+static __inline void
+bus_space_copy_region_4(bus_space_tag_t tag, bus_space_handle_t bsh1,
+			bus_size_t off1, bus_space_handle_t bsh2,
+			bus_size_t off2, size_t count)
+{
+	bus_space_handle_t addr1 = bsh1 + off1;
+	bus_space_handle_t addr2 = bsh2 + off2;
+
+	if (tag == X86_BUS_SPACE_IO) {
+		if (addr1 >= addr2) {
+			/* src after dest: copy forward */
+			for (; count != 0; count--, addr1 += 4, addr2 += 4)
+				outl(addr2, inl(addr1));
+		} else {
+			/* dest after src: copy backwards */
+			for (addr1 += 4 * (count - 1), addr2 += 4 * (count - 1);
+			    count != 0; count--, addr1 -= 4, addr2 -= 4)
+				outl(addr2, inl(addr1));
+		}
+	} else {
+		if (addr1 >= addr2) {
+			/* src after dest: copy forward */
+			for (; count != 0; count--, addr1 += 4, addr2 += 4)
+				*(volatile u_int32_t *)(addr2) =
+				    *(volatile u_int32_t *)(addr1);
+		} else {
+			/* dest after src: copy backwards */
+			for (addr1 += 4 * (count - 1), addr2 += 4 * (count - 1);
+			    count != 0; count--, addr1 -= 4, addr2 -= 4)
+				*(volatile u_int32_t *)(addr2) =
+				    *(volatile u_int32_t *)(addr1);
+		}
+	}
+}
+
+#if 0	/* Cause a link error for bus_space_copy_8 */
+#define	bus_space_copy_region_8	!!! bus_space_copy_region_8 unimplemented !!!
+#endif
+
+/*
+ * Bus read/write barrier methods.
+ *
+ *	void bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t bsh,
+ *			       bus_size_t offset, bus_size_t len, int flags);
+ *
+ *
+ * Note that BUS_SPACE_BARRIER_WRITE doesn't do anything other than
+ * prevent reordering by the compiler; all Intel x86 processors currently
+ * retire operations outside the CPU in program order.
+ */
+#define	BUS_SPACE_BARRIER_READ	0x01		/* force read barrier */
+#define	BUS_SPACE_BARRIER_WRITE	0x02		/* force write barrier */
+
+static __inline void
+bus_space_barrier(bus_space_tag_t tag __unused, bus_space_handle_t bsh __unused,
+		  bus_size_t offset __unused, bus_size_t len __unused, int flags)
+{
+#ifdef __GNUCLIKE_ASM
+	if (flags & BUS_SPACE_BARRIER_READ)
+#ifdef __amd64__
+		__asm __volatile("lock; addl $0,0(%%rsp)" : : : "memory");
+#else
+		__asm __volatile("lock; addl $0,0(%%esp)" : : : "memory");
+#endif
+	else
+		__compiler_membar();
+#endif
+}
+
+#ifdef BUS_SPACE_NO_LEGACY
+#undef inb
+#undef outb
+#define inb(a) compiler_error
+#define inw(a) compiler_error
+#define inl(a) compiler_error
+#define outb(a, b) compiler_error
+#define outw(a, b) compiler_error
+#define outl(a, b) compiler_error
+#endif
+
+#include <machine/bus_dma.h>
+
+/*
+ * Stream accesses are the same as normal accesses on x86; there are no
+ * supported bus systems with an endianess different from the host one.
+ */
+#define	bus_space_read_stream_1(t, h, o)	bus_space_read_1((t), (h), (o))
+#define	bus_space_read_stream_2(t, h, o)	bus_space_read_2((t), (h), (o))
+#define	bus_space_read_stream_4(t, h, o)	bus_space_read_4((t), (h), (o))
+
+#define	bus_space_read_multi_stream_1(t, h, o, a, c) \
+	bus_space_read_multi_1((t), (h), (o), (a), (c))
+#define	bus_space_read_multi_stream_2(t, h, o, a, c) \
+	bus_space_read_multi_2((t), (h), (o), (a), (c))
+#define	bus_space_read_multi_stream_4(t, h, o, a, c) \
+	bus_space_read_multi_4((t), (h), (o), (a), (c))
+
+#define	bus_space_write_stream_1(t, h, o, v) \
+	bus_space_write_1((t), (h), (o), (v))
+#define	bus_space_write_stream_2(t, h, o, v) \
+	bus_space_write_2((t), (h), (o), (v))
+#define	bus_space_write_stream_4(t, h, o, v) \
+	bus_space_write_4((t), (h), (o), (v))
+
+#define	bus_space_write_multi_stream_1(t, h, o, a, c) \
+	bus_space_write_multi_1((t), (h), (o), (a), (c))
+#define	bus_space_write_multi_stream_2(t, h, o, a, c) \
+	bus_space_write_multi_2((t), (h), (o), (a), (c))
+#define	bus_space_write_multi_stream_4(t, h, o, a, c) \
+	bus_space_write_multi_4((t), (h), (o), (a), (c))
+
+#define	bus_space_set_multi_stream_1(t, h, o, v, c) \
+	bus_space_set_multi_1((t), (h), (o), (v), (c))
+#define	bus_space_set_multi_stream_2(t, h, o, v, c) \
+	bus_space_set_multi_2((t), (h), (o), (v), (c))
+#define	bus_space_set_multi_stream_4(t, h, o, v, c) \
+	bus_space_set_multi_4((t), (h), (o), (v), (c))
+
+#define	bus_space_read_region_stream_1(t, h, o, a, c) \
+	bus_space_read_region_1((t), (h), (o), (a), (c))
+#define	bus_space_read_region_stream_2(t, h, o, a, c) \
+	bus_space_read_region_2((t), (h), (o), (a), (c))
+#define	bus_space_read_region_stream_4(t, h, o, a, c) \
+	bus_space_read_region_4((t), (h), (o), (a), (c))
+
+#define	bus_space_write_region_stream_1(t, h, o, a, c) \
+	bus_space_write_region_1((t), (h), (o), (a), (c))
+#define	bus_space_write_region_stream_2(t, h, o, a, c) \
+	bus_space_write_region_2((t), (h), (o), (a), (c))
+#define	bus_space_write_region_stream_4(t, h, o, a, c) \
+	bus_space_write_region_4((t), (h), (o), (a), (c))
+
+#define	bus_space_set_region_stream_1(t, h, o, v, c) \
+	bus_space_set_region_1((t), (h), (o), (v), (c))
+#define	bus_space_set_region_stream_2(t, h, o, v, c) \
+	bus_space_set_region_2((t), (h), (o), (v), (c))
+#define	bus_space_set_region_stream_4(t, h, o, v, c) \
+	bus_space_set_region_4((t), (h), (o), (v), (c))
+
+#define	bus_space_copy_region_stream_1(t, h1, o1, h2, o2, c) \
+	bus_space_copy_region_1((t), (h1), (o1), (h2), (o2), (c))
+#define	bus_space_copy_region_stream_2(t, h1, o1, h2, o2, c) \
+	bus_space_copy_region_2((t), (h1), (o1), (h2), (o2), (c))
+#define	bus_space_copy_region_stream_4(t, h1, o1, h2, o2, c) \
+	bus_space_copy_region_4((t), (h1), (o1), (h2), (o2), (c))
+
+#endif /* _X86_BUS_H_ */