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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 | #include "sim-main.h" | |
23 | #include "hw-main.h" | |
24 | ||
25 | /* DEVICE | |
26 | ||
27 | core - root of the device tree | |
28 | ||
29 | DESCRIPTION | |
30 | ||
31 | The core device, positioned at the root of the device tree appears | |
32 | to its child devices as a normal device just like every other | |
33 | device in the tree. | |
34 | ||
35 | Internally it is implemented using a core object. Requests to | |
36 | attach (or detach) address spaces are passed to that core object. | |
37 | Requests to transfer (DMA) data are reflected back down the device | |
38 | tree using the core_map data transfer methods. | |
39 | ||
40 | PROPERTIES | |
41 | ||
42 | None. | |
43 | ||
44 | */ | |
45 | ||
46 | ||
47 | static void | |
48 | dv_core_attach_address_callback (struct hw *me, | |
49 | int level, | |
50 | int space, | |
51 | address_word addr, | |
52 | address_word nr_bytes, | |
53 | struct hw *client) | |
54 | { | |
55 | HW_TRACE ((me, "attach - level=%d, space=%d, addr=0x%lx, nr_bytes=%ld, client=%s", | |
56 | level, space, (unsigned long) addr, (unsigned long) nr_bytes, hw_path (client))); | |
57 | /* NOTE: At preset the space is assumed to be zero. Perhaphs the | |
58 | space should be mapped onto something for instance: space0 - | |
59 | unified memory; space1 - IO memory; ... */ | |
60 | if (space != 0) | |
61 | hw_abort (me, "Hey! Unknown space %d", space); | |
62 | sim_core_attach (hw_system (me), | |
63 | NULL, /*cpu*/ | |
64 | level, | |
65 | access_read_write_exec, | |
66 | space, addr, | |
67 | nr_bytes, | |
68 | 0, /* modulo */ | |
69 | client, | |
70 | NULL); | |
71 | } | |
72 | ||
73 | ||
74 | static unsigned | |
75 | dv_core_dma_read_buffer_callback (struct hw *me, | |
76 | void *dest, | |
77 | int space, | |
78 | unsigned_word addr, | |
79 | unsigned nr_bytes) | |
80 | { | |
81 | return sim_core_read_buffer (hw_system (me), | |
82 | NULL, /*CPU*/ | |
83 | space, /*???*/ | |
84 | dest, | |
85 | addr, | |
86 | nr_bytes); | |
87 | } | |
88 | ||
89 | ||
90 | static unsigned | |
91 | dv_core_dma_write_buffer_callback (struct hw *me, | |
92 | const void *source, | |
93 | int space, | |
94 | unsigned_word addr, | |
95 | unsigned nr_bytes, | |
96 | int violate_read_only_section) | |
97 | { | |
98 | return sim_core_write_buffer (hw_system (me), | |
99 | NULL, /*cpu*/ | |
100 | space, /*???*/ | |
101 | source, | |
102 | addr, | |
103 | nr_bytes); | |
104 | } | |
105 | ||
106 | ||
107 | static void | |
108 | dv_core_finish (struct hw *me) | |
109 | { | |
110 | set_hw_attach_address (me, dv_core_attach_address_callback); | |
111 | set_hw_dma_write_buffer (me, dv_core_dma_write_buffer_callback); | |
112 | set_hw_dma_read_buffer (me, dv_core_dma_read_buffer_callback); | |
113 | } | |
114 | ||
115 | const struct hw_descriptor dv_core_descriptor[] = { | |
116 | { "core", dv_core_finish, }, | |
117 | { NULL }, | |
118 | }; |