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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/* Copyright (C) 1992-2018 Free Software Foundation, Inc.
This file is part of GDB.
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/>. */
#include "defs.h"
#include "target-dcache.h"
#include "gdbcmd.h"
#include "progspace.h"
/* The target dcache is kept per-address-space. This key lets us
associate the cache with the address space. */
static const struct address_space_data *target_dcache_aspace_key;
/* Clean up dcache, represented by ARG, which is associated with
ASPACE. */
static void
target_dcache_cleanup (struct address_space *aspace, void *arg)
{
dcache_free ((DCACHE *) arg);
}
/* Target dcache is initialized or not. */
int
target_dcache_init_p (void)
{
DCACHE *dcache
= (DCACHE *) address_space_data (current_program_space->aspace,
target_dcache_aspace_key);
return (dcache != NULL);
}
/* Invalidate the target dcache. */
void
target_dcache_invalidate (void)
{
DCACHE *dcache
= (DCACHE *) address_space_data (current_program_space->aspace,
target_dcache_aspace_key);
if (dcache != NULL)
dcache_invalidate (dcache);
}
/* Return the target dcache. Return NULL if target dcache is not
initialized yet. */
DCACHE *
target_dcache_get (void)
{
DCACHE *dcache
= (DCACHE *) address_space_data (current_program_space->aspace,
target_dcache_aspace_key);
return dcache;
}
/* Return the target dcache. If it is not initialized yet, initialize
it. */
DCACHE *
target_dcache_get_or_init (void)
{
DCACHE *dcache
= (DCACHE *) address_space_data (current_program_space->aspace,
target_dcache_aspace_key);
if (dcache == NULL)
{
dcache = dcache_init ();
set_address_space_data (current_program_space->aspace,
target_dcache_aspace_key, dcache);
}
return dcache;
}
/* The option sets this. */
static int stack_cache_enabled_1 = 1;
/* And set_stack_cache updates this.
The reason for the separation is so that we don't flush the cache for
on->on transitions. */
static int stack_cache_enabled = 1;
/* This is called *after* the stack-cache has been set.
Flush the cache for off->on and on->off transitions.
There's no real need to flush the cache for on->off transitions,
except cleanliness. */
static void
set_stack_cache (const char *args, int from_tty, struct cmd_list_element *c)
{
if (stack_cache_enabled != stack_cache_enabled_1)
target_dcache_invalidate ();
stack_cache_enabled = stack_cache_enabled_1;
}
static void
show_stack_cache (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file, _("Cache use for stack accesses is %s.\n"), value);
}
/* Return true if "stack cache" is enabled, otherwise, return false. */
int
stack_cache_enabled_p (void)
{
return stack_cache_enabled;
}
/* The option sets this. */
static int code_cache_enabled_1 = 1;
/* And set_code_cache updates this.
The reason for the separation is so that we don't flush the cache for
on->on transitions. */
static int code_cache_enabled = 1;
/* This is called *after* the code-cache has been set.
Flush the cache for off->on and on->off transitions.
There's no real need to flush the cache for on->off transitions,
except cleanliness. */
static void
set_code_cache (const char *args, int from_tty, struct cmd_list_element *c)
{
if (code_cache_enabled != code_cache_enabled_1)
target_dcache_invalidate ();
code_cache_enabled = code_cache_enabled_1;
}
/* Show option "code-cache". */
static void
show_code_cache (struct ui_file *file, int from_tty,
struct cmd_list_element *c, const char *value)
{
fprintf_filtered (file, _("Cache use for code accesses is %s.\n"), value);
}
/* Return true if "code cache" is enabled, otherwise, return false. */
int
code_cache_enabled_p (void)
{
return code_cache_enabled;
}
void
_initialize_target_dcache (void)
{
add_setshow_boolean_cmd ("stack-cache", class_support,
&stack_cache_enabled_1, _("\
Set cache use for stack access."), _("\
Show cache use for stack access."), _("\
When on, use the target memory cache for all stack access, regardless of any\n\
configured memory regions. This improves remote performance significantly.\n\
By default, caching for stack access is on."),
set_stack_cache,
show_stack_cache,
&setlist, &showlist);
add_setshow_boolean_cmd ("code-cache", class_support,
&code_cache_enabled_1, _("\
Set cache use for code segment access."), _("\
Show cache use for code segment access."), _("\
When on, use the target memory cache for all code segment accesses,\n\
regardless of any configured memory regions. This improves remote\n\
performance significantly. By default, caching for code segment\n\
access is on."),
set_code_cache,
show_code_cache,
&setlist, &showlist);
target_dcache_aspace_key
= register_address_space_data_with_cleanup (NULL,
target_dcache_cleanup);
}
|
