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freebsd/sys/alpha/include/bus.h

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Add initial support for the FreeBSD/alpha kernel. This is very much a work in progress and has never booted a real machine. Initial development and testing was done using SimOS (see http://simos.stanford.edu for details). On the SimOS simulator, this port successfully reaches single-user mode and has been tested with loads as high as one copy of /bin/ls :-). Obtained from: partly from NetBSD/alpha
1998-06-10 10:57:29 +00:00
/* $NetBSD: bus.h,v 1.22 1998/05/13 21:21:16 thorpej Exp $ */
/*-
* Copyright (c) 1997, 1998 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 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#ifndef _ALPHA_BUS_H_
#define _ALPHA_BUS_H_
#ifndef __BUS_SPACE_COMPAT_OLDDEFS
#define __BUS_SPACE_COMPAT_OLDDEFS
#endif
/*
* Addresses (in bus space).
*/
typedef u_long bus_addr_t;
typedef u_long bus_size_t;
/*
* Access methods for bus space.
*/
typedef struct alpha_bus_space *bus_space_tag_t;
typedef u_long bus_space_handle_t;
struct alpha_bus_space {
/* cookie */
void *abs_cookie;
/* mapping/unmapping */
int (*abs_map) __P((void *, bus_addr_t, bus_size_t,
int, bus_space_handle_t *));
void (*abs_unmap) __P((void *, bus_space_handle_t,
bus_size_t));
int (*abs_subregion) __P((void *, bus_space_handle_t,
bus_size_t, bus_size_t, bus_space_handle_t *));
/* allocation/deallocation */
int (*abs_alloc) __P((void *, bus_addr_t, bus_addr_t,
bus_size_t, bus_size_t, bus_size_t, int,
bus_addr_t *, bus_space_handle_t *));
void (*abs_free) __P((void *, bus_space_handle_t,
bus_size_t));
/* barrier */
void (*abs_barrier) __P((void *, bus_space_handle_t,
bus_size_t, bus_size_t, int));
/* read (single) */
u_int8_t (*abs_r_1) __P((void *, bus_space_handle_t,
bus_size_t));
u_int16_t (*abs_r_2) __P((void *, bus_space_handle_t,
bus_size_t));
u_int32_t (*abs_r_4) __P((void *, bus_space_handle_t,
bus_size_t));
u_int64_t (*abs_r_8) __P((void *, bus_space_handle_t,
bus_size_t));
/* read multiple */
void (*abs_rm_1) __P((void *, bus_space_handle_t,
bus_size_t, u_int8_t *, bus_size_t));
void (*abs_rm_2) __P((void *, bus_space_handle_t,
bus_size_t, u_int16_t *, bus_size_t));
void (*abs_rm_4) __P((void *, bus_space_handle_t,
bus_size_t, u_int32_t *, bus_size_t));
void (*abs_rm_8) __P((void *, bus_space_handle_t,
bus_size_t, u_int64_t *, bus_size_t));
/* read region */
void (*abs_rr_1) __P((void *, bus_space_handle_t,
bus_size_t, u_int8_t *, bus_size_t));
void (*abs_rr_2) __P((void *, bus_space_handle_t,
bus_size_t, u_int16_t *, bus_size_t));
void (*abs_rr_4) __P((void *, bus_space_handle_t,
bus_size_t, u_int32_t *, bus_size_t));
void (*abs_rr_8) __P((void *, bus_space_handle_t,
bus_size_t, u_int64_t *, bus_size_t));
/* write (single) */
void (*abs_w_1) __P((void *, bus_space_handle_t,
bus_size_t, u_int8_t));
void (*abs_w_2) __P((void *, bus_space_handle_t,
bus_size_t, u_int16_t));
void (*abs_w_4) __P((void *, bus_space_handle_t,
bus_size_t, u_int32_t));
void (*abs_w_8) __P((void *, bus_space_handle_t,
bus_size_t, u_int64_t));
/* write multiple */
void (*abs_wm_1) __P((void *, bus_space_handle_t,
bus_size_t, const u_int8_t *, bus_size_t));
void (*abs_wm_2) __P((void *, bus_space_handle_t,
bus_size_t, const u_int16_t *, bus_size_t));
void (*abs_wm_4) __P((void *, bus_space_handle_t,
bus_size_t, const u_int32_t *, bus_size_t));
void (*abs_wm_8) __P((void *, bus_space_handle_t,
bus_size_t, const u_int64_t *, bus_size_t));
/* write region */
void (*abs_wr_1) __P((void *, bus_space_handle_t,
bus_size_t, const u_int8_t *, bus_size_t));
void (*abs_wr_2) __P((void *, bus_space_handle_t,
bus_size_t, const u_int16_t *, bus_size_t));
void (*abs_wr_4) __P((void *, bus_space_handle_t,
bus_size_t, const u_int32_t *, bus_size_t));
void (*abs_wr_8) __P((void *, bus_space_handle_t,
bus_size_t, const u_int64_t *, bus_size_t));
/* set multiple */
void (*abs_sm_1) __P((void *, bus_space_handle_t,
bus_size_t, u_int8_t, bus_size_t));
void (*abs_sm_2) __P((void *, bus_space_handle_t,
bus_size_t, u_int16_t, bus_size_t));
void (*abs_sm_4) __P((void *, bus_space_handle_t,
bus_size_t, u_int32_t, bus_size_t));
void (*abs_sm_8) __P((void *, bus_space_handle_t,
bus_size_t, u_int64_t, bus_size_t));
/* set region */
void (*abs_sr_1) __P((void *, bus_space_handle_t,
bus_size_t, u_int8_t, bus_size_t));
void (*abs_sr_2) __P((void *, bus_space_handle_t,
bus_size_t, u_int16_t, bus_size_t));
void (*abs_sr_4) __P((void *, bus_space_handle_t,
bus_size_t, u_int32_t, bus_size_t));
void (*abs_sr_8) __P((void *, bus_space_handle_t,
bus_size_t, u_int64_t, bus_size_t));
/* copy */
void (*abs_c_1) __P((void *, bus_space_handle_t, bus_size_t,
bus_space_handle_t, bus_size_t, bus_size_t));
void (*abs_c_2) __P((void *, bus_space_handle_t, bus_size_t,
bus_space_handle_t, bus_size_t, bus_size_t));
void (*abs_c_4) __P((void *, bus_space_handle_t, bus_size_t,
bus_space_handle_t, bus_size_t, bus_size_t));
void (*abs_c_8) __P((void *, bus_space_handle_t, bus_size_t,
bus_space_handle_t, bus_size_t, bus_size_t));
};
/*
* Utility macros; INTERNAL USE ONLY.
*/
#define __abs_c(a,b) __CONCAT(a,b)
#define __abs_opname(op,size) __abs_c(__abs_c(__abs_c(abs_,op),_),size)
#define __abs_rs(sz, t, h, o) \
(*(t)->__abs_opname(r,sz))((t)->abs_cookie, h, o)
#define __abs_ws(sz, t, h, o, v) \
(*(t)->__abs_opname(w,sz))((t)->abs_cookie, h, o, v)
#ifndef DEBUG
#define __abs_nonsingle(type, sz, t, h, o, a, c) \
(*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, a, c)
#else
#define __abs_nonsingle(type, sz, t, h, o, a, c) \
do { \
if (((unsigned long)a & (sz - 1)) != 0) \
panic("bus non-single %d-byte unaligned (to %p) at %s:%d", \
sz, a, __FILE__, __LINE__); \
(*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, a, c); \
} while (0)
#endif
#define __abs_set(type, sz, t, h, o, v, c) \
(*(t)->__abs_opname(type,sz))((t)->abs_cookie, h, o, v, c)
#define __abs_copy(sz, t, h1, o1, h2, o2, cnt) \
(*(t)->__abs_opname(c,sz))((t)->abs_cookie, h1, o1, h2, o2, cnt)
/*
* Mapping and unmapping operations.
*/
#define bus_space_map(t, a, s, f, hp) \
(*(t)->abs_map)((t)->abs_cookie, (a), (s), (f), (hp))
#define bus_space_unmap(t, h, s) \
(*(t)->abs_unmap)((t)->abs_cookie, (h), (s))
#define bus_space_subregion(t, h, o, s, hp) \
(*(t)->abs_subregion)((t)->abs_cookie, (h), (o), (s), (hp))
#define BUS_SPACE_MAP_CACHEABLE 0x01
#define BUS_SPACE_MAP_LINEAR 0x02
/*
* Allocation and deallocation operations.
*/
#define bus_space_alloc(t, rs, re, s, a, b, f, ap, hp) \
(*(t)->abs_alloc)((t)->abs_cookie, (rs), (re), (s), (a), (b), \
(f), (ap), (hp))
#define bus_space_free(t, h, s) \
(*(t)->abs_free)((t)->abs_cookie, (h), (s))
/*
* Bus barrier operations.
*/
#define bus_space_barrier(t, h, o, l, f) \
(*(t)->abs_barrier)((t)->abs_cookie, (h), (o), (l), (f))
#define BUS_SPACE_BARRIER_READ 0x01
#define BUS_SPACE_BARRIER_WRITE 0x02
#ifdef __BUS_SPACE_COMPAT_OLDDEFS
/* compatibility definitions; deprecated */
#define BUS_BARRIER_READ BUS_SPACE_BARRIER_READ
#define BUS_BARRIER_WRITE BUS_SPACE_BARRIER_WRITE
#endif
/*
* Bus read (single) operations.
*/
#define bus_space_read_1(t, h, o) __abs_rs(1,(t),(h),(o))
#define bus_space_read_2(t, h, o) __abs_rs(2,(t),(h),(o))
#define bus_space_read_4(t, h, o) __abs_rs(4,(t),(h),(o))
#define bus_space_read_8(t, h, o) __abs_rs(8,(t),(h),(o))
/*
* Bus read multiple operations.
*/
#define bus_space_read_multi_1(t, h, o, a, c) \
__abs_nonsingle(rm,1,(t),(h),(o),(a),(c))
#define bus_space_read_multi_2(t, h, o, a, c) \
__abs_nonsingle(rm,2,(t),(h),(o),(a),(c))
#define bus_space_read_multi_4(t, h, o, a, c) \
__abs_nonsingle(rm,4,(t),(h),(o),(a),(c))
#define bus_space_read_multi_8(t, h, o, a, c) \
__abs_nonsingle(rm,8,(t),(h),(o),(a),(c))
/*
* Bus read region operations.
*/
#define bus_space_read_region_1(t, h, o, a, c) \
__abs_nonsingle(rr,1,(t),(h),(o),(a),(c))
#define bus_space_read_region_2(t, h, o, a, c) \
__abs_nonsingle(rr,2,(t),(h),(o),(a),(c))
#define bus_space_read_region_4(t, h, o, a, c) \
__abs_nonsingle(rr,4,(t),(h),(o),(a),(c))
#define bus_space_read_region_8(t, h, o, a, c) \
__abs_nonsingle(rr,8,(t),(h),(o),(a),(c))
/*
* Bus write (single) operations.
*/
#define bus_space_write_1(t, h, o, v) __abs_ws(1,(t),(h),(o),(v))
#define bus_space_write_2(t, h, o, v) __abs_ws(2,(t),(h),(o),(v))
#define bus_space_write_4(t, h, o, v) __abs_ws(4,(t),(h),(o),(v))
#define bus_space_write_8(t, h, o, v) __abs_ws(8,(t),(h),(o),(v))
/*
* Bus write multiple operations.
*/
#define bus_space_write_multi_1(t, h, o, a, c) \
__abs_nonsingle(wm,1,(t),(h),(o),(a),(c))
#define bus_space_write_multi_2(t, h, o, a, c) \
__abs_nonsingle(wm,2,(t),(h),(o),(a),(c))
#define bus_space_write_multi_4(t, h, o, a, c) \
__abs_nonsingle(wm,4,(t),(h),(o),(a),(c))
#define bus_space_write_multi_8(t, h, o, a, c) \
__abs_nonsingle(wm,8,(t),(h),(o),(a),(c))
/*
* Bus write region operations.
*/
#define bus_space_write_region_1(t, h, o, a, c) \
__abs_nonsingle(wr,1,(t),(h),(o),(a),(c))
#define bus_space_write_region_2(t, h, o, a, c) \
__abs_nonsingle(wr,2,(t),(h),(o),(a),(c))
#define bus_space_write_region_4(t, h, o, a, c) \
__abs_nonsingle(wr,4,(t),(h),(o),(a),(c))
#define bus_space_write_region_8(t, h, o, a, c) \
__abs_nonsingle(wr,8,(t),(h),(o),(a),(c))
/*
* Set multiple operations.
*/
#define bus_space_set_multi_1(t, h, o, v, c) \
__abs_set(sm,1,(t),(h),(o),(v),(c))
#define bus_space_set_multi_2(t, h, o, v, c) \
__abs_set(sm,2,(t),(h),(o),(v),(c))
#define bus_space_set_multi_4(t, h, o, v, c) \
__abs_set(sm,4,(t),(h),(o),(v),(c))
#define bus_space_set_multi_8(t, h, o, v, c) \
__abs_set(sm,8,(t),(h),(o),(v),(c))
/*
* Set region operations.
*/
#define bus_space_set_region_1(t, h, o, v, c) \
__abs_set(sr,1,(t),(h),(o),(v),(c))
#define bus_space_set_region_2(t, h, o, v, c) \
__abs_set(sr,2,(t),(h),(o),(v),(c))
#define bus_space_set_region_4(t, h, o, v, c) \
__abs_set(sr,4,(t),(h),(o),(v),(c))
#define bus_space_set_region_8(t, h, o, v, c) \
__abs_set(sr,8,(t),(h),(o),(v),(c))
/*
* Copy region operations.
*/
#define bus_space_copy_region_1(t, h1, o1, h2, o2, c) \
__abs_copy(1, (t), (h1), (o1), (h2), (o2), (c))
#define bus_space_copy_region_2(t, h1, o1, h2, o2, c) \
__abs_copy(2, (t), (h1), (o1), (h2), (o2), (c))
#define bus_space_copy_region_4(t, h1, o1, h2, o2, c) \
__abs_copy(4, (t), (h1), (o1), (h2), (o2), (c))
#define bus_space_copy_region_8(t, h1, o1, h2, o2, c) \
__abs_copy(8, (t), (h1), (o1), (h2), (o2), (c))
#ifdef __BUS_SPACE_COMPAT_OLDDEFS
/* compatibility definitions; deprecated */
#define bus_space_copy_1(t, h1, o1, h2, o2, c) \
bus_space_copy_region_1((t), (h1), (o1), (h2), (o2), (c))
#define bus_space_copy_2(t, h1, o1, h2, o2, c) \
bus_space_copy_region_1((t), (h1), (o1), (h2), (o2), (c))
#define bus_space_copy_4(t, h1, o1, h2, o2, c) \
bus_space_copy_region_1((t), (h1), (o1), (h2), (o2), (c))
#define bus_space_copy_8(t, h1, o1, h2, o2, c) \
bus_space_copy_region_1((t), (h1), (o1), (h2), (o2), (c))
#endif
/*
* Bus DMA methods.
*/
/*
* 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_DMA_COHERENT 0x04 /* hint: map memory DMA coherent */
#define BUS_DMA_BUS1 0x10 /* placeholders for bus functions... */
#define BUS_DMA_BUS2 0x20
#define BUS_DMA_BUS3 0x40
#define BUS_DMA_BUS4 0x80
/*
* Private flags stored in the DMA map.
*/
#define DMAMAP_HAS_SGMAP 0x80000000 /* sgva/len are valid */
/* Forwards needed by prototypes below. */
struct mbuf;
struct uio;
struct alpha_sgmap;
/*
* Operations performed by bus_dmamap_sync().
*/
#define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
#define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
#define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
#define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
/*
* alpha_bus_t
*
* Busses supported by NetBSD/alpha, used by internal
* utility functions. NOT TO BE USED BY MACHINE-INDEPENDENT
* CODE!
*/
typedef enum {
ALPHA_BUS_TURBOCHANNEL,
ALPHA_BUS_PCI,
ALPHA_BUS_EISA,
ALPHA_BUS_ISA,
ALPHA_BUS_TLSB,
} alpha_bus_t;
typedef struct alpha_bus_dma_tag *bus_dma_tag_t;
typedef struct alpha_bus_dmamap *bus_dmamap_t;
/*
* bus_dma_segment_t
*
* Describes a single contiguous DMA transaction. Values
* are suitable for programming into DMA registers.
*/
struct alpha_bus_dma_segment {
bus_addr_t ds_addr; /* DMA address */
bus_size_t ds_len; /* length of transfer */
};
typedef struct alpha_bus_dma_segment bus_dma_segment_t;
/*
* bus_dma_tag_t
*
* A machine-dependent opaque type describing the implementation of
* DMA for a given bus.
*/
struct alpha_bus_dma_tag {
void *_cookie; /* cookie used in the guts */
bus_addr_t _wbase; /* DMA window base */
/*
* The following two members are used to chain DMA windows
* together. If, during the course of a map load, the
* resulting physical memory address is too large to
* be addressed by the window, the next window will be
* attempted. These would be chained together like so:
*
* direct -> sgmap -> NULL
* or
* sgmap -> NULL
* or
* direct -> NULL
*
* If the window size is 0, it will not be checked (e.g.
* TurboChannel DMA).
*/
bus_size_t _wsize;
struct alpha_bus_dma_tag *_next_window;
/*
* A chipset may have more than one SGMAP window, so SGMAP
* windows also get a pointer to their SGMAP state.
*/
struct alpha_sgmap *_sgmap;
/*
* Internal-use only utility methods. NOT TO BE USED BY
* MACHINE-INDEPENDENT CODE!
*/
bus_dma_tag_t (*_get_tag) __P((bus_dma_tag_t, alpha_bus_t));
/*
* DMA mapping methods.
*/
int (*_dmamap_create) __P((bus_dma_tag_t, bus_size_t, int,
bus_size_t, bus_size_t, int, bus_dmamap_t *));
void (*_dmamap_destroy) __P((bus_dma_tag_t, bus_dmamap_t));
int (*_dmamap_load) __P((bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int));
int (*_dmamap_load_mbuf) __P((bus_dma_tag_t, bus_dmamap_t,
struct mbuf *, int));
int (*_dmamap_load_uio) __P((bus_dma_tag_t, bus_dmamap_t,
struct uio *, int));
int (*_dmamap_load_raw) __P((bus_dma_tag_t, bus_dmamap_t,
bus_dma_segment_t *, int, bus_size_t, int));
void (*_dmamap_unload) __P((bus_dma_tag_t, bus_dmamap_t));
void (*_dmamap_sync) __P((bus_dma_tag_t, bus_dmamap_t,
bus_addr_t, bus_size_t, int));
/*
* DMA memory utility functions.
*/
int (*_dmamem_alloc) __P((bus_dma_tag_t, bus_size_t, bus_size_t,
bus_size_t, bus_dma_segment_t *, int, int *, int));
void (*_dmamem_free) __P((bus_dma_tag_t,
bus_dma_segment_t *, int));
int (*_dmamem_map) __P((bus_dma_tag_t, bus_dma_segment_t *,
int, size_t, caddr_t *, int));
void (*_dmamem_unmap) __P((bus_dma_tag_t, caddr_t, size_t));
int (*_dmamem_mmap) __P((bus_dma_tag_t, bus_dma_segment_t *,
int, int, int, int));
};
#define alphabus_dma_get_tag(t, b) \
(*(t)->_get_tag)(t, b)
#define bus_dmamap_create(t, s, n, m, b, f, p) \
(*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p))
#define bus_dmamap_destroy(t, p) \
(*(t)->_dmamap_destroy)((t), (p))
#define bus_dmamap_load(t, m, b, s, p, f) \
(*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f))
#define bus_dmamap_load_mbuf(t, m, b, f) \
(*(t)->_dmamap_load_mbuf)((t), (m), (b), (f))
#define bus_dmamap_load_uio(t, m, u, f) \
(*(t)->_dmamap_load_uio)((t), (m), (u), (f))
#define bus_dmamap_load_raw(t, m, sg, n, s, f) \
(*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f))
#define bus_dmamap_unload(t, p) \
(*(t)->_dmamap_unload)((t), (p))
#define bus_dmamap_sync(t, p, o, l, ops) \
(*(t)->_dmamap_sync)((t), (p), (o), (l), (ops))
#define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \
(*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f))
#define bus_dmamem_free(t, sg, n) \
(*(t)->_dmamem_free)((t), (sg), (n))
#define bus_dmamem_map(t, sg, n, s, k, f) \
(*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f))
#define bus_dmamem_unmap(t, k, s) \
(*(t)->_dmamem_unmap)((t), (k), (s))
#define bus_dmamem_mmap(t, sg, n, o, p, f) \
(*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f))
/*
* bus_dmamap_t
*
* Describes a DMA mapping.
*/
struct alpha_bus_dmamap {
/*
* PRIVATE MEMBERS: not for use my machine-independent code.
*/
vm_object_t _dm_obj; /* for allocating pages */
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 */
int _dm_flags; /* misc. flags */
/*
* This is used only for SGMAP-mapped DMA, but we keep it
* here to avoid pointless indirection.
*/
int _dm_pteidx; /* PTE index */
int _dm_ptecnt; /* PTE count */
u_long _dm_sgva; /* allocated sgva */
bus_size_t _dm_sgvalen; /* svga length */
/*
* PUBLIC MEMBERS: these are used by machine-independent code.
*/
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 */
};
#ifdef _ALPHA_BUS_DMA_PRIVATE
int _bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, bus_size_t,
bus_size_t, int, bus_dmamap_t *));
void _bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t));
int _bus_dmamap_load_direct __P((bus_dma_tag_t, bus_dmamap_t,
void *, bus_size_t, struct proc *, int));
int _bus_dmamap_load_mbuf_direct __P((bus_dma_tag_t,
bus_dmamap_t, struct mbuf *, int));
int _bus_dmamap_load_uio_direct __P((bus_dma_tag_t,
bus_dmamap_t, struct uio *, int));
int _bus_dmamap_load_raw_direct __P((bus_dma_tag_t,
bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int));
void _bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t));
void _bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
bus_size_t, int));
int _bus_dmamem_alloc __P((bus_dma_tag_t tag, bus_dmamap_t, 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 __P((bus_dma_tag_t tag, bus_dma_segment_t *segs,
int nsegs));
int _bus_dmamem_map __P((bus_dma_tag_t tag, bus_dma_segment_t *segs,
int nsegs, size_t size, caddr_t *kvap, int flags));
void _bus_dmamem_unmap __P((bus_dma_tag_t tag, caddr_t kva,
size_t size));
int _bus_dmamem_mmap __P((bus_dma_tag_t tag, bus_dma_segment_t *segs,
int nsegs, int off, int prot, int flags));
#endif /* _ALPHA_BUS_DMA_PRIVATE */
#endif /* _ALPHA_BUS_H_ */
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