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c906108c SS |
1 | /* This file is part of the program psim. |
2 | ||
3 | Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au> | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | ||
19 | */ | |
20 | ||
21 | ||
22 | #ifndef _HW_IOBUS_C_ | |
23 | #define _HW_IOBUS_C_ | |
24 | ||
25 | #ifndef STATIC_INLINE_HW_IOBUS | |
26 | #define STATIC_INLINE_HW_IOBUS STATIC_INLINE | |
27 | #endif | |
28 | ||
29 | #include "device_table.h" | |
30 | ||
31 | ||
32 | /* DEVICE | |
33 | ||
34 | iobus - simple bus for attaching devices | |
35 | ||
36 | DESCRIPTION | |
37 | ||
38 | IOBUS provides a simple `local' bus for attaching (hanging) | |
39 | programmed IO devices from. All child devices are directly mapped | |
40 | into this devices parent address space (after checking that the | |
41 | attach address lies within the <<iobus>> address range. address). | |
42 | ||
43 | PROPERTIES | |
44 | ||
45 | None. | |
46 | ||
47 | */ | |
48 | ||
49 | static void | |
50 | hw_iobus_attach_address_callback(device *me, | |
51 | attach_type type, | |
52 | int space, | |
53 | unsigned_word addr, | |
54 | unsigned nr_bytes, | |
55 | access_type access, | |
56 | device *client) /*callback/default*/ | |
57 | { | |
58 | int attach_space; | |
59 | unsigned_word attach_address; | |
60 | /* sanity check */ | |
61 | if (space != 0) | |
62 | device_error(me, "invalid space (%d) specified by %s", | |
63 | space, device_path(client)); | |
64 | /* get the bus address */ | |
65 | device_address_to_attach_address(device_parent(me), | |
66 | device_unit_address(me), | |
67 | &attach_space, | |
68 | &attach_address, | |
69 | me); | |
70 | if (addr < attach_address) | |
71 | device_error(me, "Invalid attach address 0x%lx", (unsigned long)addr); | |
72 | device_attach_address(device_parent(me), | |
73 | type, | |
74 | attach_space, | |
75 | addr, | |
76 | nr_bytes, | |
77 | access, | |
78 | client); | |
79 | } | |
80 | ||
81 | ||
82 | static device_callbacks const hw_iobus_callbacks = { | |
83 | { NULL, }, | |
84 | { hw_iobus_attach_address_callback, }, | |
85 | { NULL, }, /* IO */ | |
86 | { NULL, }, /* DMA */ | |
87 | { NULL, }, /* interrupt */ | |
88 | { generic_device_unit_decode, | |
89 | generic_device_unit_encode, | |
90 | generic_device_address_to_attach_address, | |
91 | generic_device_size_to_attach_size } | |
92 | }; | |
93 | ||
94 | ||
95 | const device_descriptor hw_iobus_device_descriptor[] = { | |
96 | { "iobus", NULL, &hw_iobus_callbacks }, | |
97 | { NULL, }, | |
98 | }; | |
99 | ||
100 | #endif /* _HW_IOBUS_ */ |