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freebsd-dev/sys/i386/include/bus_at386.h

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Implementation of Bus Space for FreeBSD-x86. Obtained From: NetBSD
1998-01-15 07:32:56 +00:00
/* $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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1996 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.
*/
/* $Id$ */
#ifndef _I386_BUS_H_
#define _I386_BUS_H_
#include <machine/cpufunc.h>
/*
* Values for the i386 bus space tag, not to be used directly by MI code.
*/
#define I386_BUS_SPACE_IO 0 /* space is i/o space */
#define I386_BUS_SPACE_MEM 1 /* space is mem space */
/*
* Bus address and size types
*/
typedef u_long bus_addr_t;
typedef u_long bus_size_t;
#define BUS_SPACE_MAXSIZE_24BIT 0xFFFFFF
#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
#define BUS_SPACE_MAXSIZE (64 * 1024) /* Maximum supported size */
#define BUS_SPACE_MAXADDR_24BIT 0xFFFFFF
#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
#define BUS_SPACE_MAXADDR 0xFFFFFFFF
/*
* Access methods for bus resources and address space.
*/
typedef int bus_space_tag_t;
typedef u_long bus_space_handle_t;
/*
* Map a region of device bus space into CPU virtual address space.
*/
#define BUS_SPACE_MAP_CACHEABLE 0x01
#define BUS_SPACE_MAP_LINEAR 0x02
int bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size,
int flags, bus_space_handle_t *bshp);
/*
* Unmap a region of device bus space.
*/
void bus_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh,
bus_size_t size);
/*
* Get a new handle for a subregion of an already-mapped area of bus space.
*/
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);
/*
* 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.
*/
void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh,
bus_size_t size);
#if defined(_I386_BUS_PIO_H_) || defined(_I386_BUS_MEMIO_H_)
/*
* 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 defined (_I386_BUS_PIO_H_)
#if defined (_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
return (inb(handle + offset));
#endif
#if defined (_I386_BUS_MEMIO_H_)
return (*(volatile u_int8_t *)(handle + offset));
#endif
}
static __inline u_int16_t
bus_space_read_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_size_t offset)
{
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
return (inw(handle + offset));
#endif
#if defined(_I386_BUS_MEMIO_H_)
return (*(volatile u_int16_t *)(handle + offset));
#endif
}
static __inline u_int32_t
bus_space_read_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_size_t offset)
{
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
return (inl(handle + offset));
#endif
#if defined(_I386_BUS_MEMIO_H_)
return (*(volatile u_int32_t *)(handle + offset));
#endif
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
insb(bsh + offset, addr, count);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: movb (%1),%%al ;
stosb ;
loop 1b" :
"=&a" (__x) :
"r" (bsh + offset), "D" (addr), "c" (count) :
"%edi", "%ecx", "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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
insw(bsh + offset, addr, count);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: movw (%1),%%ax ;
stosw ;
loop 1b" :
"=&a" (__x) :
"r" (bsh + offset), "D" (addr), "c" (count) :
"%edi", "%ecx", "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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
insl(bsh + offset, addr, count);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: movl (%1),%%eax ;
stosl ;
loop 1b" :
"=&a" (__x) :
"r" (bsh + offset), "D" (addr), "c" (count) :
"%edi", "%ecx", "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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: inb %w1,%%al ;
stosb ;
incl %1 ;
loop 1b" :
"=&a" (__x) :
"d" (bsh + offset), "D" (addr), "c" (count) :
"%edx", "%edi", "%ecx", "memory");
}
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
__asm __volatile("
cld ;
repne ;
movsb" :
:
"S" (bsh + offset), "D" (addr), "c" (count) :
"%esi", "%edi", "%ecx", "memory");
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: inw %w1,%%ax ;
stosw ;
addl $2,%1 ;
loop 1b" :
"=&a" (__x) :
"d" (bsh + offset), "D" (addr), "c" (count) :
"%edx", "%edi", "%ecx", "memory");
}
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
__asm __volatile("
cld ;
repne ;
movsw" :
:
"S" (bsh + offset), "D" (addr), "c" (count) :
"%esi", "%edi", "%ecx", "memory");
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: inl %w1,%%eax ;
stosl ;
addl $4,%1 ;
loop 1b" :
"=&a" (__x) :
"d" (bsh + offset), "D" (addr), "c" (count) :
"%edx", "%edi", "%ecx", "memory");
}
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
__asm __volatile("
cld ;
repne ;
movsl" :
:
"S" (bsh + offset), "D" (addr), "c" (count) :
"%esi", "%edi", "%ecx", "memory");
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
outb(bsh + offset, value);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
*(volatile u_int8_t *)(bsh + offset) = value;
#endif
}
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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
outw(bsh + offset, value);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
*(volatile u_int16_t *)(bsh + offset) = value;
#endif
}
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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
outl(bsh + offset, value);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
*(volatile u_int32_t *)(bsh + offset) = value;
#endif
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
outsb(bsh + offset, addr, count);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: lodsb ;
movb %%al,(%1) ;
loop 1b" :
"=&a" (__x) :
"r" (bsh + offset), "S" (addr), "c" (count) :
"%esi", "%ecx");
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
outsw(bsh + offset, addr, count);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: lodsw ;
movw %%ax,(%1) ;
loop 1b" :
"=&a" (__x) :
"r" (bsh + offset), "S" (addr), "c" (count) :
"%esi", "%ecx");
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
outsl(bsh + offset, addr, count);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: lodsl ;
movl %%eax,(%1) ;
loop 1b" :
"=&a" (__x) :
"r" (bsh + offset), "S" (addr), "c" (count) :
"%esi", "%ecx");
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: lodsb ;
outb %%al,%w1 ;
incl %1 ;
loop 1b" :
"=&a" (__x) :
"d" (bsh + offset), "S" (addr), "c" (count) :
"%edx", "%esi", "%ecx", "memory");
}
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
__asm __volatile("
cld ;
repne ;
movsb" :
:
"D" (bsh + offset), "S" (addr), "c" (count) :
"%edi", "%esi", "%ecx", "memory");
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: lodsw ;
outw %%ax,%w1 ;
addl $2,%1 ;
loop 1b" :
"=&a" (__x) :
"d" (bsh + offset), "S" (addr), "c" (count) :
"%edx", "%esi", "%ecx", "memory");
}
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
__asm __volatile("
cld ;
repne ;
movsw" :
:
"D" (bsh + offset), "S" (addr), "c" (count) :
"%edi", "%esi", "%ecx", "memory");
}
#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 defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
{
int __x __asm__("%eax");
__asm __volatile("
cld ;
1: lodsl ;
outl %%eax,%w1 ;
addl $4,%1 ;
loop 1b" :
"=&a" (__x) :
"d" (bsh + offset), "S" (addr), "c" (count) :
"%edx", "%esi", "%ecx", "memory");
}
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
__asm __volatile("
cld ;
repne ;
movsl" :
:
"D" (bsh + offset), "S" (addr), "c" (count) :
"%edi", "%esi", "%ecx", "memory");
}
#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_addr_t addr = bsh + offset;
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
while (count--)
outb(addr, value);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
while (count--)
*(volatile u_int8_t *)(addr) = value;
#endif
}
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_addr_t addr = bsh + offset;
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
while (count--)
outw(addr, value);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
while (count--)
*(volatile u_int16_t *)(addr) = value;
#endif
}
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_addr_t addr = bsh + offset;
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
while (count--)
outl(addr, value);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
while (count--)
*(volatile u_int32_t *)(addr) = value;
#endif
}
#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_addr_t addr = bsh + offset;
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
for (; count != 0; count--, addr++)
outb(addr, value);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
for (; count != 0; count--, addr++)
*(volatile u_int8_t *)(addr) = value;
#endif
}
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_addr_t addr = bsh + offset;
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
for (; count != 0; count--, addr += 2)
outw(addr, value);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
for (; count != 0; count--, addr += 2)
*(volatile u_int16_t *)(addr) = value;
#endif
}
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_addr_t addr = bsh + offset;
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
for (; count != 0; count--, addr += 4)
outl(addr, value);
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
for (; count != 0; count--, addr += 4)
*(volatile u_int32_t *)(addr) = value;
#endif
}
#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_addr_t addr1 = bsh1 + off1;
bus_addr_t addr2 = bsh2 + off2;
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
{
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));
}
}
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
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);
}
}
#endif
}
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_addr_t addr1 = bsh1 + off1;
bus_addr_t addr2 = bsh2 + off2;
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
{
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));
}
}
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
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);
}
}
#endif
}
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_addr_t addr1 = bsh1 + off1;
bus_addr_t addr2 = bsh2 + off2;
#if defined(_I386_BUS_PIO_H_)
#if defined(_I386_BUS_MEMIO_H_)
if (tag == I386_BUS_SPACE_IO)
#endif
{
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));
}
}
#endif
#if defined(_I386_BUS_MEMIO_H_)
#if defined(_I386_BUS_PIO_H_)
else
#endif
{
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);
}
}
#endif
}
#endif /* defined(_I386_BUS_PIO_H_) || defined(_I386_MEM_IO_H_) */
#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: the i386 does not currently require barriers, but we must
* provide the flags to MI code.
*/
#define bus_space_barrier(t, h, o, l, f) \
((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)))
#define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */
#define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */
/*
* Flags used in various bus DMA methods.
*/
#define BUS_DMA_WAITOK 0x00 /* safe to sleep (pseudo-flag) */
#define BUS_DMA_NOWAIT 0x01 /* not safe to sleep */
#define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */
#define BUS_DMAMEM_NOSYNC 0x04 /* map memory to not require sync */
#define BUS_DMA_BUS1 0x10 /* placeholders for bus functions... */
#define BUS_DMA_BUS2 0x20
#define BUS_DMA_BUS3 0x40
#define BUS_DMA_BUS4 0x80
/* Forwards needed by prototypes below. */
struct mbuf;
struct uio;
/*
* bus_dmasync_op_t
*
* Operations performed by bus_dmamap_sync().
*/
typedef enum {
BUS_DMASYNC_PREREAD,
BUS_DMASYNC_POSTREAD,
BUS_DMASYNC_PREWRITE,
BUS_DMASYNC_POSTWRITE,
} bus_dmasync_op_t;
/*
* bus_dma_tag_t
*
* A machine-dependent opaque type describing the characteristics
* of how to perform DMA mappings. This structure encapsultes
* information concerning address and alignment restrictions, number
* of S/G segments, amount of data per S/G segment, etc.
*/
typedef struct bus_dma_tag *bus_dma_tag_t;
/*
* bus_dmamap_t
*
* DMA mapping instance information.
*/
typedef struct bus_dmamap *bus_dmamap_t;
/*
* bus_dma_segment_t
*
* Describes a single contiguous DMA transaction. Values
* are suitable for programming into DMA registers.
*/
typedef struct bus_dma_segment {
bus_addr_t ds_addr; /* DMA address */
bus_size_t ds_len; /* length of transfer */
} bus_dma_segment_t;
/*
* A function that returns 1 if the address cannot be accessed by
* a device and 0 if it can be.
*/
typedef int bus_dma_filter_t(void *, bus_addr_t);
/*
* Allocate a device specific dma_tag encapsulating the constraints of
* the parent tag in addition to other restrictions specified:
*
* boundary: Boundary that segments cannot cross.
* lowaddr: Low restricted address that cannot appear in a mapping.
* highaddr: High restricted address that cannot appear in a mapping.
* filtfunc: An optional function to further test if an address
* within the range of lowaddr and highaddr cannot appear
* in a mapping.
* filtfuncarg: An argument that will be passed to filtfunc in addition
* to the address to test.
* flags: Bus DMA flags.
* dmat: A pointer to set to a valid dma tag should the return
* value of this function indicate success.
*/
int bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t boundary,
bus_addr_t lowaddr, bus_addr_t highaddr,
bus_dma_filter_t *filtfunc, void *filtfuncarg,
bus_size_t maxsize, int nsegments, bus_size_t maxsegsz,
int flags, bus_dma_tag_t *dmat);
int bus_dma_tag_destroy(bus_dma_tag_t dmat);
/*
* Allocate a handle for mapping from kva/uva/physical
* address space into bus device space.
*
* maxsize: Maximum mapping size supported by this handle.
* nsegments: Number of discontinuities allowed in the map.
* maxsegsz: Maximum size of a segment in the map.
*/
int bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
/*
* Destroy a handle for mapping from kva/uva/physical
* address space into bus device space.
*/
int bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map);
/*
* A function that processes a successfully loaded dma map or an error
* from a delayed load map.
*/
typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
/*
* Map the buffer buf into bus space using the dmamap map.
*/
int bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
bus_size_t buflen, bus_dmamap_callback_t *callback,
void *callback_arg, int flags);
/*
* Perform a syncronization operation on the given map.
*/
void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t);
#define bus_dmamap_sync(dmat, dmamap, op) \
if ((dmamap) != NULL) \
_bus_dmamap_sync(dmat, dmamap, op)
/*
* Release the mapping held by map.
*/
void _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map);
#define bus_dmamap_unload(dmat, dmamap) \
if ((dmamap) != NULL) \
_bus_dmamap_unload(dmat, dmamap)
#endif /* _I386_BUS_H_ */
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