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
|
/* Copyright (C) 1992-2013 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"
/* Cache of memory operations, to speed up remote access. */
static DCACHE *target_dcache;
/* Target dcache is initialized or not. */
int
target_dcache_init_p (void)
{
return (target_dcache != NULL);
}
/* Invalidate the target dcache. */
void
target_dcache_invalidate (void)
{
if (target_dcache_init_p ())
dcache_invalidate (target_dcache);
}
/* Return the target dcache. Return NULL if target dcache is not
initialized yet. */
DCACHE *
target_dcache_get (void)
{
return target_dcache;
}
/* Return the target dcache. If it is not initialized yet, initialize
it. */
DCACHE *
target_dcache_get_or_init (void)
{
if (!target_dcache_init_p ())
target_dcache = dcache_init ();
return target_dcache;
}
/* The option sets this. */
static int stack_cache_enabled_p_1 = 1;
/* And set_stack_cache_enabled_p 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_p = 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_enabled_p (char *args, int from_tty,
struct cmd_list_element *c)
{
if (stack_cache_enabled_p != stack_cache_enabled_p_1)
target_dcache_invalidate ();
stack_cache_enabled_p = stack_cache_enabled_p_1;
}
static void
show_stack_cache_enabled_p (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 (void)
{
return stack_cache_enabled_p;
}
/* -Wmissing-prototypes */
extern initialize_file_ftype _initialize_target_dcache;
void
_initialize_target_dcache (void)
{
add_setshow_boolean_cmd ("stack-cache", class_support,
&stack_cache_enabled_p_1, _("\
Set cache use for stack access."), _("\
Show cache use for stack access."), _("\
When on, use the data 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_enabled_p,
show_stack_cache_enabled_p,
&setlist, &showlist);
}
|
