457 lines
13 KiB
C
457 lines
13 KiB
C
/* $NetBSD: bus.h,v 1.7 1996/12/02 05:35:13 thorpej Exp $ */
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/*
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* Copyright (c) 1996 Charles M. Hannum. All rights reserved.
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* Copyright (c) 1996 Jason R. Thorpe. All rights reserved.
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* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _I386_BUS_H_
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#define _I386_BUS_H_
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#include <machine/pio.h>
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/*
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* Values for the i386 bus space tag, not to be used directly by MI code.
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*/
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#define I386_BUS_SPACE_IO 0 /* space is i/o space */
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#define I386_BUS_SPACE_MEM 1 /* space is mem space */
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/*
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* Bus address and size types
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*/
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typedef u_long bus_addr_t;
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typedef u_long bus_size_t;
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/*
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* Access methods for bus resources and address space.
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*/
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typedef int bus_space_tag_t;
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typedef u_long bus_space_handle_t;
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int bus_space_map __P((bus_space_tag_t t, bus_addr_t addr,
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bus_size_t size, int cacheable, bus_space_handle_t *bshp));
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void bus_space_unmap __P((bus_space_tag_t t, bus_space_handle_t bsh,
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bus_size_t size));
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int bus_space_subregion __P((bus_space_tag_t t, bus_space_handle_t bsh,
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bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp));
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int bus_space_alloc __P((bus_space_tag_t t, bus_addr_t rstart,
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bus_addr_t rend, bus_size_t size, bus_size_t align,
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bus_size_t boundary, int cacheable, bus_addr_t *addrp,
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bus_space_handle_t *bshp));
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void bus_space_free __P((bus_space_tag_t t, bus_space_handle_t bsh,
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bus_size_t size));
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/*
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* u_intN_t bus_space_read_N __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset));
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*
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* Read a 1, 2, 4, or 8 byte quantity from bus space
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* described by tag/handle/offset.
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*/
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#define bus_space_read_1(t, h, o) \
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((t) == I386_BUS_SPACE_IO ? (inb((h) + (o))) : \
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(*(volatile u_int8_t *)((h) + (o))))
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#define bus_space_read_2(t, h, o) \
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((t) == I386_BUS_SPACE_IO ? (inw((h) + (o))) : \
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(*(volatile u_int16_t *)((h) + (o))))
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#define bus_space_read_4(t, h, o) \
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((t) == I386_BUS_SPACE_IO ? (inl((h) + (o))) : \
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(*(volatile u_int32_t *)((h) + (o))))
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#if 0 /* Cause a link error for bus_space_read_8 */
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#define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!!
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#endif
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/*
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* void bus_space_read_multi_N __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* u_intN_t *addr, size_t count));
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*
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* Read `count' 1, 2, 4, or 8 byte quantities from bus space
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* described by tag/handle/offset and copy into buffer provided.
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*/
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#define bus_space_read_multi_1(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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insb((h) + (o), (a), (c)); \
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} else { \
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__asm __volatile(" \
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cld ; \
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1: movb (%0),%%al ; \
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stosb ; \
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loop 1b" : \
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: \
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"r" ((h) + (o)), "D" ((a)), "c" ((c)) : \
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"%edi", "%ecx", "%eax", "memory"); \
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} \
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} while (0)
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#define bus_space_read_multi_2(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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insw((h) + (o), (a), (c)); \
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} else { \
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__asm __volatile(" \
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cld ; \
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1: movw (%0),%%ax ; \
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stosw ; \
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loop 1b" : \
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: \
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"r" ((h) + (o)), "D" ((a)), "c" ((c)) : \
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"%edi", "%ecx", "%eax", "memory"); \
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} \
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} while (0)
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#define bus_space_read_multi_4(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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insl((h) + (o), (a), (c)); \
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} else { \
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__asm __volatile(" \
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cld ; \
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1: movl (%0),%%eax ; \
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stosl ; \
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loop 1b" : \
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: \
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"r" ((h) + (o)), "D" ((a)), "c" ((c)) : \
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"%edi", "%ecx", "%eax", "memory"); \
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} \
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} while (0)
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#if 0 /* Cause a link error for bus_space_read_multi_8 */
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#define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!!
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#endif
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/*
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* void bus_space_read_region_N __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* u_intN_t *addr, size_t count));
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*
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* Read `count' 1, 2, 4, or 8 byte quantities from bus space
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* described by tag/handle and starting at `offset' and copy into
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* buffer provided.
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*/
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#define bus_space_read_region_1(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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__asm __volatile(" \
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cld ; \
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1: inb %w0,%%al ; \
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stosb ; \
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incl %0 ; \
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loop 1b" : \
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: \
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"d" ((h) + (o)), "D" ((a)), "c" ((c)) : \
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"%edx", "%edi", "%ecx", "%eax", "memory"); \
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} else { \
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__asm __volatile(" \
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cld ; \
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repne ; \
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movsb" : \
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: \
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"S" ((h) + (o)), "D" ((a)), "c" ((c)) : \
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"%esi", "%edi", "%ecx", "memory"); \
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} \
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} while (0)
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#define bus_space_read_region_2(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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__asm __volatile(" \
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cld ; \
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1: inw %w0,%%ax ; \
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stosw ; \
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addl $2,%0 ; \
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loop 1b" : \
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: \
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"d" ((h) + (o)), "D" ((a)), "c" ((c)) : \
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"%edx", "%edi", "%ecx", "%eax", "memory"); \
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} else { \
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__asm __volatile(" \
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cld ; \
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repne ; \
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movsw" : \
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: \
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"S" ((h) + (o)), "D" ((a)), "c" ((c)) : \
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"%esi", "%edi", "%ecx", "memory"); \
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} \
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} while (0)
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#define bus_space_read_region_4(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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__asm __volatile(" \
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cld ; \
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1: inl %w0,%%eax ; \
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stosl ; \
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addl $4,%0 ; \
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loop 1b" : \
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: \
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"d" ((h) + (o)), "D" ((a)), "c" ((c)) : \
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"%edx", "%edi", "%ecx", "%eax", "memory"); \
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} else { \
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__asm __volatile(" \
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cld ; \
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repne ; \
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movsl" : \
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: \
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"S" ((h) + (o)), "D" ((a)), "c" ((c)) : \
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"%esi", "%edi", "%ecx", "memory"); \
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} \
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} while (0)
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#if 0 /* Cause a link error for bus_space_read_region_8 */
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#define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!!
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#endif
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/*
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* void bus_space_write_N __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* u_intN_t value));
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*
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* Write the 1, 2, 4, or 8 byte value `value' to bus space
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* described by tag/handle/offset.
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*/
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#define bus_space_write_1(t, h, o, v) do { \
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if ((t) == I386_BUS_SPACE_IO) \
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outb((h) + (o), (v)); \
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else \
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((void)(*(volatile u_int8_t *)((h) + (o)) = (v))); \
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} while (0)
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#define bus_space_write_2(t, h, o, v) do { \
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if ((t) == I386_BUS_SPACE_IO) \
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outw((h) + (o), (v)); \
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else \
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((void)(*(volatile u_int16_t *)((h) + (o)) = (v))); \
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} while (0)
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#define bus_space_write_4(t, h, o, v) do { \
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if ((t) == I386_BUS_SPACE_IO) \
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outl((h) + (o), (v)); \
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else \
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((void)(*(volatile u_int32_t *)((h) + (o)) = (v))); \
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} while (0)
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#if 0 /* Cause a link error for bus_space_write_8 */
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#define bus_space_write_8 !!! bus_space_write_8 not implemented !!!
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#endif
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/*
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* void bus_space_write_multi_N __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* const u_intN_t *addr, size_t count));
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*
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* Write `count' 1, 2, 4, or 8 byte quantities from the buffer
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* provided to bus space described by tag/handle/offset.
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*/
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#define bus_space_write_multi_1(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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outsb((h) + (o), (a), (c)); \
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} else { \
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__asm __volatile(" \
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cld ; \
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1: lodsb ; \
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movb %%al,(%0) ; \
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loop 1b" : \
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: \
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"r" ((h) + (o)), "S" ((a)), "c" ((c)) : \
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"%esi", "%ecx", "%eax"); \
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} \
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} while (0)
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#define bus_space_write_multi_2(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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outsw((h) + (o), (a), (c)); \
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} else { \
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__asm __volatile(" \
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cld ; \
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1: lodsw ; \
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movw %%ax,(%0) ; \
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loop 1b" : \
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: \
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"r" ((h) + (o)), "S" ((a)), "c" ((c)) : \
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"%esi", "%ecx", "%eax"); \
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} \
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} while (0)
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#define bus_space_write_multi_4(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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outsl((h) + (o), (a), (c)); \
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} else { \
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__asm __volatile(" \
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cld ; \
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1: lodsl ; \
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movl %%eax,(%0) ; \
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loop 1b" : \
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: \
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"r" ((h) + (o)), "S" ((a)), "c" ((c)) : \
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"%esi", "%ecx", "%eax"); \
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} \
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} while (0)
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#if 0 /* Cause a link error for bus_space_write_multi_8 */
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#define bus_space_write_multi_8(t, h, o, a, c) \
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!!! bus_space_write_multi_8 unimplimented !!!
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#endif
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/*
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* void bus_space_write_region_N __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* const u_intN_t *addr, size_t count));
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*
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* Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
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* to bus space described by tag/handle starting at `offset'.
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*/
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#define bus_space_write_region_1(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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__asm __volatile(" \
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cld ; \
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1: lodsb ; \
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outb %%al,%w0 ; \
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incl %0 ; \
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loop 1b" : \
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: \
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"d" ((h) + (o)), "S" ((a)), "c" ((c)) : \
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"%edx", "%esi", "%ecx", "%eax", "memory"); \
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} else { \
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__asm __volatile(" \
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cld ; \
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repne ; \
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movsb" : \
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: \
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"D" ((h) + (o)), "S" ((a)), "c" ((c)) : \
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"%edi", "%esi", "%ecx", "memory"); \
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} \
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} while (0)
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#define bus_space_write_region_2(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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__asm __volatile(" \
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cld ; \
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1: lodsw ; \
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outw %%ax,%w0 ; \
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addl $2,%0 ; \
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loop 1b" : \
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: \
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"d" ((h) + (o)), "S" ((a)), "c" ((c)) : \
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"%edx", "%esi", "%ecx", "%eax", "memory"); \
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} else { \
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__asm __volatile(" \
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cld ; \
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repne ; \
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movsw" : \
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: \
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"D" ((h) + (o)), "S" ((a)), "c" ((c)) : \
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"%edi", "%esi", "%ecx", "memory"); \
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} \
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} while (0)
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#define bus_space_write_region_4(t, h, o, a, c) do { \
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if ((t) == I386_BUS_SPACE_IO) { \
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__asm __volatile(" \
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cld ; \
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1: lodsl ; \
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outl %%eax,%w0 ; \
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addl $4,%0 ; \
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loop 1b" : \
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: \
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"d" ((h) + (o)), "S" ((a)), "c" ((c)) : \
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"%edx", "%esi", "%ecx", "%eax", "memory"); \
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} else { \
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__asm __volatile(" \
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cld ; \
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repne ; \
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movsl" : \
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: \
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"D" ((h) + (o)), "S" ((a)), "c" ((c)) : \
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"%edi", "%esi", "%ecx", "memory"); \
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} \
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} while (0)
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#if 0 /* Cause a link error for bus_space_write_region_8 */
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#define bus_space_write_region_8 \
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!!! bus_space_write_region_8 unimplemented !!!
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#endif
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/*
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* void bus_space_set_multi_N __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
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* size_t count));
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*
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* Write the 1, 2, 4, or 8 byte value `val' to bus space described
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* by tag/handle/offset `count' times.
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*/
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/* XXX IMPLEMENT bus_space_set_multi_N() XXX */
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/*
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* void bus_space_set_region_N __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
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* size_t count));
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*
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* Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
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* by tag/handle starting at `offset'.
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*/
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/* XXX IMPLEMENT bus_space_set_region_N() XXX */
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/*
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* void bus_space_copy_N __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh1, bus_size_t off1,
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* bus_space_handle_t bsh2, bus_size_t off2,
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* size_t count));
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*
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* Copy `count' 1, 2, 4, or 8 byte values from bus space starting
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* at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
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*/
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/* XXX IMPLEMENT bus_space_copy_N() XXX */
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/*
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* Bus read/write barrier methods.
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*
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* void bus_space_barrier __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* bus_size_t len, int flags));
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*
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* Note: the i386 does not currently require barriers, but we must
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* provide the flags to MI code.
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*/
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#define bus_space_barrier(t, h, o, l, f) \
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((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)))
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#define BUS_BARRIER_READ 0x01 /* force read barrier */
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#define BUS_BARRIER_WRITE 0x02 /* force write barrier */
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#endif /* _I386_BUS_H_ */
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