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NetBSD/sys/arch/i386/include/bus.h

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Two things pointed out by Chris Demetriou <cgd@cs.cmu.edu>: - The boundary argument to bus_space_alloc() should be a bus_size_t, not a bus_addr_t. - The buffer arguments in the "multiple write" methods should have const qualifiers. And one from me: - Make bus_space_barrier() eat up the arguments passed to it so that the compiler doesn't needlessly whine.
1996-11-10 06:19:25 +03:00
/* $NetBSD: bus.h,v 1.6 1996/11/10 03:19:25 thorpej Exp $ */
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
/*
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
* Copyright (c) 1996 Charles M. Hannum. All rights reserved.
* Copyright (c) 1996 Jason R. Thorpe. All rights reserved.
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
* 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 _I386_BUS_H_
#define _I386_BUS_H_
#include <machine/pio.h>
/*
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
* Values for the i386 bus space tag, not to be used directly by MI code.
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
*/
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
#define I386_BUS_SPACE_IO 0 /* space is i/o space */
#define I386_BUS_SPACE_MEM 1 /* space is mem space */
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
/*
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
* Bus address and size types
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
*/
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
typedef u_long bus_addr_t;
typedef u_long bus_size_t;
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
/*
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
* Access methods for bus resources and address space.
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
*/
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
typedef int bus_space_tag_t;
typedef u_long bus_space_handle_t;
int bus_space_map __P((bus_space_tag_t t, bus_addr_t addr,
bus_size_t size, int cacheable, bus_space_handle_t *bshp));
void bus_space_unmap __P((bus_space_tag_t t, bus_space_handle_t bsh,
bus_size_t size));
int bus_space_subregion __P((bus_space_tag_t t, bus_space_handle_t bsh,
bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp));
int bus_space_alloc __P((bus_space_tag_t t, bus_addr_t rstart,
bus_addr_t rend, bus_size_t size, bus_size_t align,
Two things pointed out by Chris Demetriou <cgd@cs.cmu.edu>: - The boundary argument to bus_space_alloc() should be a bus_size_t, not a bus_addr_t. - The buffer arguments in the "multiple write" methods should have const qualifiers. And one from me: - Make bus_space_barrier() eat up the arguments passed to it so that the compiler doesn't needlessly whine.
1996-11-10 06:19:25 +03:00
bus_size_t boundary, int cacheable, bus_addr_t *addrp,
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
bus_space_handle_t *bshp));
void bus_space_free __P((bus_space_tag_t t, bus_space_handle_t bsh,
bus_size_t size));
/*
* u_intN_t bus_space_read_N __P((bus_space_tag_t tag,
* bus_space_handle_t bsh, bus_size_t offset));
*
* Read a 1, 2, 4, or 8 byte quantity from bus space
* described by tag/handle/offset.
*/
#define bus_space_read_1(t, h, o) \
((t) == I386_BUS_SPACE_IO ? (inb((h) + (o))) : \
(*(volatile u_int8_t *)((h) + (o))))
#define bus_space_read_2(t, h, o) \
((t) == I386_BUS_SPACE_IO ? (inw((h) + (o))) : \
(*(volatile u_int16_t *)((h) + (o))))
#define bus_space_read_4(t, h, o) \
((t) == I386_BUS_SPACE_IO ? (inl((h) + (o))) : \
(*(volatile u_int32_t *)((h) + (o))))
#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
/*
* void bus_space_read_multi_N __P((bus_space_tag_t tag,
* bus_space_handle_t bsh, bus_size_t offset,
* u_intN_t *addr, size_t count));
*
* Read `count' 1, 2, 4, or 8 byte quantities from bus space
* described by tag/handle/offset and copy into buffer provided.
*/
#define bus_space_read_multi_1(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
insb((h) + (o), (a), (c)); \
} else { \
__asm __volatile(" \
cld ; \
1: movb (%0),%%al ; \
stosb ; \
loop 1b" : \
: \
"r" ((h) + (o)), "D" ((a)), "c" ((c)) : \
"%edi", "%ecx", "%eax", "memory"); \
} \
} while (0)
#define bus_space_read_multi_2(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
insw((h) + (o), (a), (c)); \
} else { \
__asm __volatile(" \
cld ; \
1: movw (%0),%%ax ; \
stosw ; \
loop 1b" : \
: \
"r" ((h) + (o)), "D" ((a)), "c" ((c)) : \
"%edi", "%ecx", "%eax", "memory"); \
} \
} while (0)
#define bus_space_read_multi_4(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
insl((h) + (o), (a), (c)); \
} else { \
__asm __volatile(" \
cld ; \
1: movl (%0),%%eax ; \
stosl ; \
loop 1b" : \
: \
"r" ((h) + (o)), "D" ((a)), "c" ((c)) : \
"%edi", "%ecx", "%eax", "memory"); \
} \
} while (0)
#if 0 /* Cause a link error for bus_space_read_multi_8 */
#define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!!
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
#endif
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
/*
* void bus_space_read_region_N __P((bus_space_tag_t tag,
* bus_space_handle_t bsh, bus_size_t offset,
* u_intN_t *addr, size_t count));
*
* 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.
*/
#define bus_space_read_region_1(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
__asm __volatile(" \
cld ; \
1: inb %w0,%%al ; \
stosb ; \
incl %0 ; \
loop 1b" : \
: \
"d" ((h) + (o)), "D" ((a)), "c" ((c)) : \
"%edx", "%edi", "%ecx", "%eax", "memory"); \
} else { \
__asm __volatile(" \
cld ; \
repne ; \
movsb" : \
: \
"S" ((h) + (o)), "D" ((a)), "c" ((c)) : \
"%esi", "%edi", "%ecx", "memory"); \
} \
} while (0)
#define bus_space_read_region_2(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
__asm __volatile(" \
cld ; \
1: inw %w0,%%ax ; \
stosw ; \
addl $2,%0 ; \
loop 1b" : \
: \
"d" ((h) + (o)), "D" ((a)), "c" ((c)) : \
"%edx", "%edi", "%ecx", "%eax", "memory"); \
} else { \
__asm __volatile(" \
cld ; \
repne ; \
movsw" : \
: \
"S" ((h) + (o)), "D" ((a)), "c" ((c)) : \
"%esi", "%edi", "%ecx", "memory"); \
} \
} while (0)
#define bus_space_read_region_4(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
__asm __volatile(" \
cld ; \
1: inl %w0,%%eax ; \
stosl ; \
addl $4,%0 ; \
loop 1b" : \
: \
"d" ((h) + (o)), "D" ((a)), "c" ((c)) : \
"%edx", "%edi", "%ecx", "%eax", "memory"); \
} else { \
__asm __volatile(" \
cld ; \
repne ; \
movsl" : \
: \
"S" ((h) + (o)), "D" ((a)), "c" ((c)) : \
"%esi", "%edi", "%ecx", "memory"); \
} \
} while (0)
#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
/*
* void bus_space_write_N __P((bus_space_tag_t tag,
* bus_space_handle_t bsh, bus_size_t offset,
* u_intN_t value));
*
* Write the 1, 2, 4, or 8 byte value `value' to bus space
* described by tag/handle/offset.
*/
#define bus_space_write_1(t, h, o, v) do { \
if ((t) == I386_BUS_SPACE_IO) \
outb((h) + (o), (v)); \
else \
((void)(*(volatile u_int8_t *)((h) + (o)) = (v))); \
} while (0)
#define bus_space_write_2(t, h, o, v) do { \
if ((t) == I386_BUS_SPACE_IO) \
outw((h) + (o), (v)); \
else \
((void)(*(volatile u_int16_t *)((h) + (o)) = (v))); \
} while (0)
#define bus_space_write_4(t, h, o, v) do { \
if ((t) == I386_BUS_SPACE_IO) \
outl((h) + (o), (v)); \
else \
((void)(*(volatile u_int32_t *)((h) + (o)) = (v))); \
} while (0)
#if 0 /* Cause a link error for bus_space_write_8 */
#define bus_space_write_8 !!! bus_space_write_8 not implemented !!!
Add bus_io_{read,write}_multi_{1,2,4,8}() to the <machine/bus.h> interface, and implement them (except for the 8-byte versions) on the i386.
1996-04-06 03:59:37 +04:00
#endif
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
/*
* void bus_space_write_multi_N __P((bus_space_tag_t tag,
* bus_space_handle_t bsh, bus_size_t offset,
Two things pointed out by Chris Demetriou <cgd@cs.cmu.edu>: - The boundary argument to bus_space_alloc() should be a bus_size_t, not a bus_addr_t. - The buffer arguments in the "multiple write" methods should have const qualifiers. And one from me: - Make bus_space_barrier() eat up the arguments passed to it so that the compiler doesn't needlessly whine.
1996-11-10 06:19:25 +03:00
* const u_intN_t *addr, size_t count));
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
*
* Write `count' 1, 2, 4, or 8 byte quantities from the buffer
* provided to bus space described by tag/handle/offset.
*/
#define bus_space_write_multi_1(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
outsb((h) + (o), (a), (c)); \
} else { \
__asm __volatile(" \
cld ; \
1: lodsb ; \
movb %%al,(%0) ; \
loop 1b" : \
: \
"r" ((h) + (o)), "S" ((a)), "c" ((c)) : \
"%esi", "%ecx", "%eax"); \
} \
} while (0)
#define bus_space_write_multi_2(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
outsw((h) + (o), (a), (c)); \
} else { \
__asm __volatile(" \
cld ; \
1: lodsw ; \
movw %%ax,(%0) ; \
loop 1b" : \
: \
"r" ((h) + (o)), "S" ((a)), "c" ((c)) : \
"%esi", "%ecx", "%eax"); \
} \
} while (0)
#define bus_space_write_multi_4(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
outsl((h) + (o), (a), (c)); \
} else { \
__asm __volatile(" \
cld ; \
1: lodsl ; \
movl %%eax,(%0) ; \
loop 1b" : \
: \
"r" ((h) + (o)), "S" ((a)), "c" ((c)) : \
"%esi", "%ecx", "%eax"); \
} \
} while (0)
#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 unimplimented !!!
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
#endif
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
/*
* void bus_space_write_region_N __P((bus_space_tag_t tag,
* bus_space_handle_t bsh, bus_size_t offset,
Two things pointed out by Chris Demetriou <cgd@cs.cmu.edu>: - The boundary argument to bus_space_alloc() should be a bus_size_t, not a bus_addr_t. - The buffer arguments in the "multiple write" methods should have const qualifiers. And one from me: - Make bus_space_barrier() eat up the arguments passed to it so that the compiler doesn't needlessly whine.
1996-11-10 06:19:25 +03:00
* const u_intN_t *addr, size_t count));
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
*
* Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
* to bus space described by tag/handle starting at `offset'.
*/
#define bus_space_write_region_1(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
__asm __volatile(" \
cld ; \
1: lodsb ; \
outb %%al,%w0 ; \
incl %0 ; \
loop 1b" : \
: \
"d" ((h) + (o)), "S" ((a)), "c" ((c)) : \
"%edx", "%esi", "%ecx", "%eax", "memory"); \
} else { \
__asm __volatile(" \
cld ; \
repne ; \
movsb" : \
: \
"D" ((h) + (o)), "S" ((a)), "c" ((c)) : \
"%edi", "%esi", "%ecx", "memory"); \
} \
} while (0)
#define bus_space_write_region_2(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
__asm __volatile(" \
cld ; \
1: lodsw ; \
outw %%ax,%w0 ; \
addl $2,%0 ; \
loop 1b" : \
: \
"d" ((h) + (o)), "S" ((a)), "c" ((c)) : \
"%edx", "%esi", "%ecx", "%eax", "memory"); \
} else { \
__asm __volatile(" \
cld ; \
repne ; \
movsw" : \
: \
"D" ((h) + (o)), "S" ((a)), "c" ((c)) : \
"%edi", "%esi", "%ecx", "memory"); \
} \
} while (0)
#define bus_space_write_region_4(t, h, o, a, c) do { \
if ((t) == I386_BUS_SPACE_IO) { \
__asm __volatile(" \
cld ; \
1: lodsl ; \
outl %%eax,%w0 ; \
addl $4,%0 ; \
loop 1b" : \
: \
"d" ((h) + (o)), "S" ((a)), "c" ((c)) : \
"%edx", "%esi", "%ecx", "%eax", "memory"); \
} else { \
__asm __volatile(" \
cld ; \
repne ; \
movsl" : \
: \
"D" ((h) + (o)), "S" ((a)), "c" ((c)) : \
"%edi", "%esi", "%ecx", "memory"); \
} \
} while (0)
#if 0 /* Cause a link error for bus_space_write_region_8 */
#define bus_space_write_region_8 \
!!! bus_space_write_region_8 unimplemented !!!
Add bus_io_{read,write}_multi_{1,2,4,8}() to the <machine/bus.h> interface, and implement them (except for the 8-byte versions) on the i386.
1996-04-06 03:59:37 +04:00
#endif
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
/*
* void bus_space_set_multi_N __P((bus_space_tag_t tag,
* bus_space_handle_t bsh, u_intN_t val, size_t count));
*
* Write the 1, 2, 4, or 8 byte value `val' to bus space described
* by tag/handle/offset `count' times.
*/
/* XXX IMPLEMENT bus_space_set_multi_N() XXX */
/*
* void bus_space_set_region_N __P((bus_space_tag_t tag,
* bus_space_handle_t bsh, u_intN_t val, size_t count));
*
* Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
* by tag/handle starting at `offset'.
*/
/* XXX IMPLEMENT bus_space_set_region_N() XXX */
/*
* void bus_space_copy_N __P((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));
*
* 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.
*/
/* XXX IMPLEMENT bus_space_copy_N() XXX */
/*
* Bus read/write barrier methods.
*
* void bus_space_barrier __P((bus_space_tag_t tag,
* bus_space_handle_t bsh, bus_size_t offset,
* bus_size_t len, int flags));
*
* Note: the i386 does not currently require barriers, but we must
* provide the flags to MI code.
*/
Two things pointed out by Chris Demetriou <cgd@cs.cmu.edu>: - The boundary argument to bus_space_alloc() should be a bus_size_t, not a bus_addr_t. - The buffer arguments in the "multiple write" methods should have const qualifiers. And one from me: - Make bus_space_barrier() eat up the arguments passed to it so that the compiler doesn't needlessly whine.
1996-11-10 06:19:25 +03:00
#define bus_space_barrier(t, h, o, l, f) \
((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)))
New bus.h implementation/interface: - No more distinction between i/o-mapped and memory-mapped devices. It's all "bus space" now, and space tags differentiate the space with finer grain than the bus chipset tag. - Add memory barrier methods. - Implement space alloc/free methods. - Implement region read/write methods (like memcpy to/from bus space). This interface provides a better abstraction for dealing with machine-independent chipset drivers.
1996-10-22 02:24:37 +04:00
#define BUS_BARRIER_READ 0x01 /* force read barrier */
#define BUS_BARRIER_WRITE 0x02 /* force write barrier */
bus memory and I/O space access functions/macros, to be used by machine-independent code for more sane access to bus resources. New functions will be added to this set, in the future, as appropriate, but this is a good starting set. Defines: bus_{io,mem}_{map,unmap} bus_{io,mem}_{read,write}_{1,2,4,8} functions, and several types to go with them.
1996-03-08 23:11:23 +03:00
#endif /* _I386_BUS_H_ */
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