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|
/* $OpenBSD: bus.h,v 1.8 2009/07/26 18:48:55 miod Exp $ */
/*
* Copyright (c) 2004, Miodrag Vallat.
*
* 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 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.
*/
/*
* Simple mvme88k bus_space and bus_dma implementation.
*
* Currently, we only need specific handling for 32 bit read/writes in D16
* space, and this choice is made at compile time. As a result, all the
* implementation can go through macros or inline functions, except for
* the management functions.
*/
#ifndef _MVME88K_BUS_H_
#define _MVME88K_BUS_H_
#include <machine/asm_macro.h>
typedef u_int32_t bus_addr_t;
typedef u_int32_t bus_size_t;
typedef u_int32_t bus_space_handle_t;
struct mvme88k_bus_space_tag {
int (*bs_map)(bus_addr_t, bus_size_t, int, bus_space_handle_t *);
void (*bs_unmap)(bus_space_handle_t, bus_size_t);
int (*bs_subregion)(bus_space_handle_t, bus_size_t, bus_size_t,
bus_space_handle_t *);
void * (*bs_vaddr)(bus_space_handle_t);
/* alloc, free not implemented yet */
};
typedef const struct mvme88k_bus_space_tag *bus_space_tag_t;
#define BUS_SPACE_BARRIER_READ 0
#define BUS_SPACE_BARRIER_WRITE 1
#define BUS_SPACE_MAP_CACHEABLE 0x01
#define BUS_SPACE_MAP_LINEAR 0x02
#define BUS_SPACE_MAP_PREFETCHABLE 0x04
/*
* General bus_space function set
*/
#define bus_space_map(t,a,s,f,r) ((t)->bs_map(a,s,f,r))
#define bus_space_unmap(t,h,s) ((t)->bs_unmap(h,s))
#define bus_space_subregion(t,h,o,s,r) ((t)->bs_subregion(h,o,s,r))
#define bus_space_vaddr(t,h) ((t)->bs_vaddr(h))
static void bus_space_barrier(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, bus_size_t, int);
static __inline__ void
bus_space_barrier(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, bus_size_t size, int flags)
{
flush_pipeline(); /* overkill? */
}
/*
* Read/Write/Region functions for D8 and D16 access.
* Most of these are straightforward and assume that everything is properly
* aligned.
*/
#define bus_space_read_1(tag, handle, offset) \
((void)(tag), *(volatile u_int8_t *)((handle) + (offset)))
#define bus_space_read_2(tag, handle, offset) \
((void)(tag), *(volatile u_int16_t *)((handle) + (offset)))
static void bus_space_read_multi_1(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_read_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
*dest++ = bus_space_read_1(tag, 0, offset);
}
static void bus_space_read_multi_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int16_t *, size_t);
static __inline__ void
bus_space_read_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int16_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
*dest++ = bus_space_read_2(tag, 0, offset);
}
static void bus_space_read_raw_multi_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_read_raw_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
offset += handle;
size >>= 1;
while ((int)--size >= 0) {
*(u_int16_t *)dest =
bus_space_read_2(tag, 0, offset);
dest += 2;
}
}
static void bus_space_read_region_1(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_read_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
*dest++ = bus_space_read_1(tag, 0, offset++);
}
static void bus_space_read_region_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int16_t *, size_t);
static __inline__ void
bus_space_read_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int16_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0) {
*dest++ = bus_space_read_2(tag, 0, offset);
offset += 2;
}
}
static void bus_space_read_raw_region_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_read_raw_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
size >>= 1;
offset += handle;
while ((int)--size >= 0) {
*(u_int16_t *)dest = bus_space_read_2(tag, 0, offset);
offset += 2;
dest += 2;
}
}
#define bus_space_write_1(tag, handle, offset, value) \
((void)(tag), *(volatile u_int8_t *)((handle) + (offset)) = (value))
#define bus_space_write_2(tag, handle, offset, value) \
((void)(tag), *(volatile u_int16_t *)((handle) + (offset)) = (value))
static void bus_space_write_multi_1(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_write_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_1(tag, 0, offset, *dest++);
}
static void bus_space_write_multi_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int16_t *, size_t);
static __inline__ void
bus_space_write_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int16_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_2(tag, 0, offset, *dest++);
}
static void bus_space_write_raw_multi_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_write_raw_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
offset += handle;
size >>= 1;
while ((int)--size >= 0) {
bus_space_write_2(tag, 0, offset, *(u_int16_t *)dest);
dest += 2;
}
}
static void bus_space_set_multi_1(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t, size_t);
static __inline__ void
bus_space_set_multi_1(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t value, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_1(tag, 0, offset, value);
}
static void bus_space_set_multi_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int16_t, size_t);
static __inline__ void
bus_space_set_multi_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int16_t value, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_2(tag, 0, offset, value);
}
static void bus_space_write_region_1(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_write_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_1(tag, 0, offset++, *dest++);
}
static void bus_space_write_region_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int16_t *, size_t);
static __inline__ void
bus_space_write_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int16_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0) {
bus_space_write_2(tag, 0, offset, *dest++);
offset += 2;
}
}
static void bus_space_write_raw_region_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_write_raw_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
offset += handle;
size >>= 1;
while ((int)--size >= 0) {
bus_space_write_2(tag, 0, offset, *(u_int16_t *)dest);
offset += 2;
dest += 2;
}
}
static void bus_space_set_region_1(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t, size_t);
static __inline__ void
bus_space_set_region_1(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t value, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_1(tag, 0, offset++, value);
}
static void bus_space_set_region_2(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int16_t, size_t);
static __inline__ void
bus_space_set_region_2(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int16_t value, size_t count)
{
offset += handle;
while ((int)--count >= 0) {
bus_space_write_2(tag, 0, offset, value);
offset += 2;
}
}
static void bus_space_copy_1(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
bus_space_handle_t, bus_addr_t, bus_size_t);
static __inline__ void
bus_space_copy_1(bus_space_tag_t tag, bus_space_handle_t h1, bus_addr_t o1,
bus_space_handle_t h2, bus_addr_t o2, bus_size_t count)
{
o1 += h1;
o2 += h2;
while ((int)--count >= 0) {
*((volatile u_int8_t *)o1)++ = *((volatile u_int8_t *)o2)++;
}
}
static void bus_space_copy_2(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
bus_space_handle_t, bus_addr_t, bus_size_t);
static __inline__ void
bus_space_copy_2(bus_space_tag_t tag, bus_space_handle_t h1, bus_addr_t o1,
bus_space_handle_t h2, bus_addr_t o2, bus_size_t count)
{
o1 += h1;
o2 += h2;
while ((int)--count >= 0) {
*(volatile u_int16_t *)o1 = *(volatile u_int16_t *)o2;
o1 += 2;
o2 += 2;
}
}
/*
* Unrestricted D32 access
*/
#ifndef __BUS_SPACE_RESTRICT_D16__
#define bus_space_read_4(tag, handle, offset) \
((void)(tag), *(volatile u_int32_t *)((handle) + (offset)))
static void bus_space_read_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t *, size_t);
static __inline__ void
bus_space_read_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
*dest++ = bus_space_read_4(tag, 0, offset);
}
static void bus_space_read_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_read_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
offset += handle;
size >>= 2;
while ((int)--size >= 0) {
*(u_int32_t *)dest =
bus_space_read_4(tag, 0, offset);
dest += 4;
}
}
static void bus_space_read_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t *, size_t);
static __inline__ void
bus_space_read_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0) {
*dest++ = bus_space_read_4(tag, 0, offset);
offset += 4;
}
}
static void bus_space_read_raw_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_read_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
size >>= 2;
offset += handle;
while ((int)--size >= 0) {
*(u_int32_t *)dest = bus_space_read_4(tag, 0, offset);
offset += 4;
dest += 4;
}
}
#define bus_space_write_4(tag, handle, offset, value) \
((void)(tag), *(volatile u_int32_t *)((handle) + (offset)) = (value))
static void bus_space_write_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t *, size_t);
static __inline__ void
bus_space_write_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_4(tag, 0, offset, *dest++);
}
static void bus_space_write_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_write_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
offset += handle;
size >>= 2;
while ((int)--size >= 0) {
bus_space_write_4(tag, 0, offset, *(u_int32_t *)dest);
dest += 4;
}
}
static void bus_space_set_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t, size_t);
static __inline__ void
bus_space_set_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t value, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_4(tag, 0, offset, value);
}
static void bus_space_write_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t *, size_t);
static __inline__ void
bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0) {
bus_space_write_4(tag, 0, offset, *dest++);
offset += 4;
}
}
static void bus_space_write_raw_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_write_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
offset += handle;
size >>= 2;
while ((int)--size >= 0) {
bus_space_write_4(tag, 0, offset, *(u_int32_t *)dest);
offset += 4;
dest += 4;
}
}
static void bus_space_set_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t, size_t);
static __inline__ void
bus_space_set_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t value, size_t count)
{
offset += handle;
while ((int)--count >= 0) {
bus_space_write_4(tag, 0, offset, value);
offset += 4;
}
}
static void bus_space_copy_4(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
bus_space_handle_t, bus_addr_t, bus_size_t);
static __inline__ void
bus_space_copy_4(bus_space_tag_t tag, bus_space_handle_t h1, bus_addr_t o1,
bus_space_handle_t h2, bus_addr_t o2, bus_size_t count)
{
o1 += h1;
o2 += h2;
while ((int)--count >= 0) {
*(volatile u_int32_t *)o1 = *(volatile u_int32_t *)o2;
o1 += 4;
o2 += 4;
}
}
#else /* __BUS_SPACE_RESTRICT_D16__ */
/*
* Restricted D32 access - done through two adjacent D16 access.
*
* The speed of the basic read and write routines is critical.
* This implementation uses a temporary variable on stack, and does
* two 16 bit load&store sequences. Since the stack is in Dcache, this
* is faster and spills fewer register than a register-only sequence
* (which would need to ld.h into two distinct registers, then extu
* the second one into itself, and or both in the result register).
*/
static u_int32_t d16_read_4(vaddr_t);
static void d16_write_4(vaddr_t, u_int32_t);
static __inline__ u_int32_t
d16_read_4(vaddr_t va)
{
u_int32_t tmp;
*(u_int16_t *)&tmp = *(volatile u_int16_t *)va;
*(u_int16_t *)((vaddr_t)&tmp + 2) = *(volatile u_int16_t *)(va + 2);
return tmp;
}
static __inline__ void
d16_write_4(vaddr_t va, u_int32_t value)
{
u_int32_t tmp = value;
*(volatile u_int16_t *)va = *(u_int16_t *)&tmp;
*(volatile u_int16_t *)(va + 2) = *(u_int16_t *)((vaddr_t)&tmp + 2);
}
#define bus_space_read_4(tag, handle, offset) \
((void)(tag), d16_read_4((handle) + (offset)))
static void bus_space_read_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t *, size_t);
static __inline__ void
bus_space_read_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
*dest++ = bus_space_read_4(tag, 0, offset);
}
static void bus_space_read_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_read_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
offset += handle;
size >>= 1;
while ((int)--size >= 0) {
*(u_int16_t *)dest = bus_space_read_2(tag, 0, offset);
dest += 2;
}
}
static void bus_space_read_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t *, size_t);
static __inline__ void
bus_space_read_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t *__dest, size_t count)
{
u_int16_t *dest = (u_int16_t *)__dest;
offset += handle;
count <<= 1;
while ((int)--count >= 0) {
*dest++ = bus_space_read_2(tag, 0, offset);
offset += 2;
}
}
static void bus_space_read_raw_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_read_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
size >>= 1;
offset += handle;
while ((int)--size >= 0) {
*(u_int16_t *)dest = bus_space_read_2(tag, 0, offset);
offset += 2;
dest += 2;
}
}
#define bus_space_write_4(tag, handle, offset, value) \
((void)(tag), d16_write_4((handle) + (offset), (value)))
static void bus_space_write_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t *, size_t);
static __inline__ void
bus_space_write_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t *dest, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_4(tag, 0, offset, *dest++);
}
static void bus_space_write_raw_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_write_raw_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
offset += handle;
size >>= 1;
while ((int)--size >= 0) {
bus_space_write_2(tag, 0, offset, *(u_int16_t *)dest);
dest += 2;
}
}
static void bus_space_set_multi_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t, size_t);
static __inline__ void
bus_space_set_multi_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t value, size_t count)
{
offset += handle;
while ((int)--count >= 0)
bus_space_write_4(tag, 0, offset, value);
}
static void bus_space_write_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t *, size_t);
static __inline__ void
bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t *__dest, size_t count)
{
u_int16_t *dest = (u_int16_t *)__dest;
offset += handle;
count <<= 1;
while ((int)--count >= 0) {
bus_space_write_2(tag, 0, offset, *dest++);
offset += 2;
}
}
static void bus_space_write_raw_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int8_t *, size_t);
static __inline__ void
bus_space_write_raw_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int8_t *dest, size_t size)
{
offset += handle;
size >>= 1;
while ((int)--size >= 0) {
bus_space_write_2(tag, 0, offset, *(u_int16_t *)dest);
offset += 2;
dest += 2;
}
}
static void bus_space_set_region_4(bus_space_tag_t, bus_space_handle_t,
bus_addr_t, u_int32_t, size_t);
static __inline__ void
bus_space_set_region_4(bus_space_tag_t tag, bus_space_handle_t handle,
bus_addr_t offset, u_int32_t value, size_t count)
{
offset += handle;
while ((int)--count >= 0) {
bus_space_write_4(tag, 0, offset, value);
offset += 4;
}
}
static void bus_space_copy_4(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
bus_space_handle_t, bus_addr_t, bus_size_t);
static __inline__ void
bus_space_copy_4(bus_space_tag_t tag, bus_space_handle_t h1, bus_addr_t o1,
bus_space_handle_t h2, bus_addr_t o2, bus_size_t count)
{
o1 += h1;
o2 += h2;
count <<= 1;
while ((int)--count >= 0) {
*(volatile u_int16_t *)o1 = *(volatile u_int16_t *)o2;
o1 += 2;
o2 += 2;
}
}
#endif /* __BUS_SPACE_RESTRICT_D16__ */
/*
* Extra D16 access functions (see vme.c)
*/
void d16_bcopy(const void *, void *, size_t);
void d16_bzero(void *, size_t);
/*
* Bus DMA implementation
*/
#define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */
#define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */
#define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */
#define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */
#define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */
#define BUS_DMA_BUS2 0x020
#define BUS_DMA_BUS3 0x040
#define BUS_DMA_BUS4 0x080
#define BUS_DMA_READ 0x100 /* mapping is device -> memory only */
#define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */
#define BUS_DMA_STREAMING 0x400 /* hint: sequential, unidirectional */
#define BUS_DMA_ZERO 0x800 /* zero memory in dmamem_alloc */
#define BUS_DMASYNC_PREREAD 0x01
#define BUS_DMASYNC_POSTREAD 0x02
#define BUS_DMASYNC_PREWRITE 0x04
#define BUS_DMASYNC_POSTWRITE 0x08
typedef u_int32_t bus_dma_tag_t; /* ignored, really */
/*
* bus_dma_segment_t
*
* Describes a single contiguous DMA transaction. Values
* are suitable for programming into DMA registers.
*/
struct m88k_bus_dma_segment {
bus_addr_t ds_addr; /* DMA address */
bus_size_t ds_len; /* length of transfer */
};
typedef struct m88k_bus_dma_segment bus_dma_segment_t;
/*
* bus_dmamap_t
*
* Describes a DMA mapping.
*/
struct m88k_bus_dmamap {
bus_size_t _dm_size; /* largest DMA transfer mappable */
int _dm_segcnt; /* number of segs this map can map */
bus_size_t _dm_maxsegsz; /* largest possible segment */
bus_size_t _dm_boundary; /* don't cross this */
bus_size_t dm_mapsize; /* size of the mapping */
int dm_nsegs; /* # valid segments in mapping */
bus_dma_segment_t dm_segs[1]; /* segments; variable length */
};
typedef struct m88k_bus_dmamap *bus_dmamap_t;
struct mbuf;
struct proc;
struct uio;
int bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
bus_size_t, int, bus_dmamap_t *);
void bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
int bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int);
int bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t,
struct mbuf *, int);
int bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t,
struct uio *, int);
int bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *,
int, bus_size_t, int);
void bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t);
void bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
bus_size_t, int);
int bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size,
bus_size_t alignment, bus_size_t boundary,
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags);
void bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs,
int nsegs);
int bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs,
int nsegs, size_t size, caddr_t *kvap, int flags);
void bus_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva,
size_t size);
paddr_t bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs,
int nsegs, off_t off, int prot, int flags);
#endif /* _MVME88K_BUS_H_ */
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