2 * Copyright (c) 2014, 2015 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #ifndef _LIBBUS_SPACE_H_
30 #define _LIBBUS_SPACE_H_
32 int bus_map(const char *dev, const char *resource);
33 int16_t bus_read_1(int rid, long ofs);
34 int32_t bus_read_2(int rid, long ofs);
35 int64_t bus_read_4(int rid, long ofs);
36 int bus_subregion(int rid, long ofs, long sz);
37 int bus_unmap(int rid);
38 int bus_write_1(int rid, long ofs, uint8_t val);
39 int bus_write_2(int rid, long ofs, uint16_t val);
40 int bus_write_4(int rid, long ofs, uint32_t val);
42 typedef unsigned long bus_addr_t;
43 typedef unsigned long bus_size_t;
44 typedef int busdma_tag_t;
45 typedef int busdma_md_t;
46 typedef int busdma_seg_t;
48 int busdma_tag_create(const char *dev, bus_addr_t align, bus_addr_t bndry,
49 bus_addr_t maxaddr, bus_size_t maxsz, u_int nsegs,
50 bus_size_t maxsegsz, u_int datarate, u_int flags,
52 int busdma_tag_derive(busdma_tag_t tag, bus_addr_t align, bus_addr_t bndry,
53 bus_addr_t maxaddr, bus_size_t maxsz, u_int nsegs,
54 bus_size_t maxsegsz, u_int datarate, u_int flags,
56 int busdma_tag_destroy(busdma_tag_t tag);
58 int busdma_mem_alloc(busdma_tag_t tag, u_int flags, busdma_md_t *out_p);
59 int busdma_mem_free(busdma_md_t md);
61 int busdma_md_create(busdma_tag_t tag, u_int flags, busdma_md_t *out_p);
62 int busdma_md_destroy(busdma_md_t md);
63 int busdma_md_load(busdma_md_t md, void *buf, size_t len, u_int flags);
64 int busdma_md_unload(busdma_md_t md);
66 #define BUSDMA_MD_BUS_SPACE 0
67 #define BUSDMA_MD_PHYS_SPACE 1
68 #define BUSDMA_MD_VIRT_SPACE 2
70 int busdma_md_first_seg(busdma_md_t, int space);
71 int busdma_md_next_seg(busdma_md_t, busdma_seg_t seg);
73 bus_addr_t busdma_seg_get_addr(busdma_seg_t seg);
74 bus_size_t busdma_seg_get_size(busdma_seg_t seg);
76 #define BUSDMA_SYNC_PREREAD 1
77 #define BUSDMA_SYNC_POSTREAD 2
78 #define BUSDMA_SYNC_PREWRITE 4
79 #define BUSDMA_SYNC_POSTWRITE 8
81 int busdma_sync(busdma_md_t md, int op);
82 int busdma_sync_range(busdma_md_t md, int op, bus_size_t, bus_size_t);
84 #endif /* _LIBBUS_SPACE_H_ */