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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _HW_CORE_C_
#define _HW_CORE_C_
#include "device_table.h"
#include "corefile.h"
/* DEVICE
core - root of the device tree
DESCRIPTION
The core device positioned at the root of the device tree appears
to its child devices as a normal device just like every other
device in the tree.
Internally it is implemented using a core object. Requests to
attach (or detach) address spaces are passed to that core object.
Requests to transfer (DMA) data are reflected back down the device
tree using the core_map data transfer methods.
PROPERTIES
None.
*/
static void
hw_core_init_address_callback(device *me)
{
core *memory = (core*)device_data(me);
core_init(memory);
}
static void
hw_core_attach_address_callback(device *me,
attach_type attach,
int space,
unsigned_word addr,
unsigned nr_bytes,
access_type access,
device *client) /*callback/default*/
{
core *memory = (core*)device_data(me);
if (space != 0)
error("core_attach_address_callback() invalid address space\n");
core_attach(memory,
attach,
space,
access,
addr,
nr_bytes,
client);
}
static unsigned
hw_core_dma_read_buffer_callback(device *me,
void *dest,
int space,
unsigned_word addr,
unsigned nr_bytes)
{
core *memory = (core*)device_data(me);
return core_map_read_buffer(core_readable(memory),
dest,
addr,
nr_bytes);
}
static unsigned
hw_core_dma_write_buffer_callback(device *me,
const void *source,
int space,
unsigned_word addr,
unsigned nr_bytes,
int violate_read_only_section)
{
core *memory = (core*)device_data(me);
core_map *map = (violate_read_only_section
? core_readable(memory)
: core_writeable(memory));
return core_map_write_buffer(map,
source,
addr,
nr_bytes);
}
static device_callbacks const hw_core_callbacks = {
{ hw_core_init_address_callback, },
{ hw_core_attach_address_callback, },
{ NULL, }, /* IO */
{ hw_core_dma_read_buffer_callback,
hw_core_dma_write_buffer_callback, },
{ NULL, }, /* interrupt */
{ generic_device_unit_decode,
generic_device_unit_encode,
generic_device_address_to_attach_address,
generic_device_size_to_attach_size, },
};
static void *
hw_core_create(const char *name,
const device_unit *unit_address,
const char *args)
{
core *memory = core_create();
return memory;
}
const device_descriptor hw_core_device_descriptor[] = {
{ "core", hw_core_create, &hw_core_callbacks },
{ NULL },
};
#endif /* _HW_CORE_C_ */
|
