1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/* This file is part of the program psim.
Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _HW_IOBUS_C_
#define _HW_IOBUS_C_
#ifndef STATIC_INLINE_HW_IOBUS
#define STATIC_INLINE_HW_IOBUS STATIC_INLINE
#endif
#include "device_table.h"
/* Device:
iobus@<address> - bus for attaching devices
Description:
IOBUS provides a simple `local' bus for attaching (hanging)
programmed IO devices from. All child devices are mapped into this
devices parent address space (after adjusting for the iobus's base
address).
Properties:
None.
*/
static void
hw_iobus_attach_address_callback(device *me,
const char *name,
attach_type type,
int space,
unsigned_word addr,
unsigned nr_bytes,
access_type access,
device *who) /*callback/default*/
{
unsigned_word hw_iobus_addr;
/* sanity check */
if (space != 0)
error("hw_iobus_attach_address_callback() no space for %s/%s\n",
device_name(me), name);
/* get the bus address */
if (device_unit_address(me)->nr_cells != 1)
error("hw_iobus_attach_address_callback() invalid address for %s\n",
device_name(me));
hw_iobus_addr = device_unit_address(me)->cells[0];
device_attach_address(device_parent(me),
device_name(me),
type,
0 /*space*/,
hw_iobus_addr + addr,
nr_bytes,
access,
who);
}
static device_callbacks const hw_iobus_callbacks = {
{ NULL, },
{ hw_iobus_attach_address_callback, },
{ NULL, }, /* IO */
{ NULL, }, /* DMA */
{ NULL, }, /* interrupt */
{ generic_device_unit_decode,
generic_device_unit_encode, }
};
const device_descriptor hw_iobus_device_descriptor[] = {
{ "iobus", NULL, &hw_iobus_callbacks },
{ NULL, },
};
#endif /* _HW_IOBUS_ */
|
