1 /* Copyright (C) 1992-2013 Free Software Foundation, Inc.
3 This file is part of GDB.
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 3 of the License, or
8 (at your option) any later version.
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.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 #include "target-dcache.h"
21 #include "progspace.h"
23 /* The target dcache is kept per-address-space. This key lets us
24 associate the cache with the address space. */
26 static const struct address_space_data *target_dcache_aspace_key;
28 /* Clean up dcache, represented by ARG, which is associated with
32 target_dcache_cleanup (struct address_space *aspace, void *arg)
37 /* Target dcache is initialized or not. */
40 target_dcache_init_p (void)
42 DCACHE *dcache = address_space_data (current_program_space->aspace,
43 target_dcache_aspace_key);
45 return (dcache != NULL);
48 /* Invalidate the target dcache. */
51 target_dcache_invalidate (void)
53 DCACHE *dcache = address_space_data (current_program_space->aspace,
54 target_dcache_aspace_key);
57 dcache_invalidate (dcache);
60 /* Return the target dcache. Return NULL if target dcache is not
64 target_dcache_get (void)
66 DCACHE *dcache = address_space_data (current_program_space->aspace,
67 target_dcache_aspace_key);
72 /* Return the target dcache. If it is not initialized yet, initialize
76 target_dcache_get_or_init (void)
78 DCACHE *dcache = address_space_data (current_program_space->aspace,
79 target_dcache_aspace_key);
83 dcache = dcache_init ();
84 set_address_space_data (current_program_space->aspace,
85 target_dcache_aspace_key, dcache);
91 /* The option sets this. */
92 static int stack_cache_enabled_1 = 1;
93 /* And set_stack_cache updates this.
94 The reason for the separation is so that we don't flush the cache for
95 on->on transitions. */
96 static int stack_cache_enabled = 1;
98 /* This is called *after* the stack-cache has been set.
99 Flush the cache for off->on and on->off transitions.
100 There's no real need to flush the cache for on->off transitions,
101 except cleanliness. */
104 set_stack_cache (char *args, int from_tty, struct cmd_list_element *c)
106 if (stack_cache_enabled != stack_cache_enabled_1)
107 target_dcache_invalidate ();
109 stack_cache_enabled = stack_cache_enabled_1;
113 show_stack_cache (struct ui_file *file, int from_tty,
114 struct cmd_list_element *c, const char *value)
116 fprintf_filtered (file, _("Cache use for stack accesses is %s.\n"), value);
119 /* Return true if "stack cache" is enabled, otherwise, return false. */
122 stack_cache_enabled_p (void)
124 return stack_cache_enabled;
127 /* The option sets this. */
129 static int code_cache_enabled_1 = 1;
131 /* And set_code_cache updates this.
132 The reason for the separation is so that we don't flush the cache for
133 on->on transitions. */
134 static int code_cache_enabled = 1;
136 /* This is called *after* the code-cache has been set.
137 Flush the cache for off->on and on->off transitions.
138 There's no real need to flush the cache for on->off transitions,
139 except cleanliness. */
142 set_code_cache (char *args, int from_tty, struct cmd_list_element *c)
144 if (code_cache_enabled != code_cache_enabled_1)
145 target_dcache_invalidate ();
147 code_cache_enabled = code_cache_enabled_1;
150 /* Show option "code-cache". */
153 show_code_cache (struct ui_file *file, int from_tty,
154 struct cmd_list_element *c, const char *value)
156 fprintf_filtered (file, _("Cache use for code accesses is %s.\n"), value);
159 /* Return true if "code cache" is enabled, otherwise, return false. */
162 code_cache_enabled_p (void)
164 return code_cache_enabled;
167 /* -Wmissing-prototypes */
168 extern initialize_file_ftype _initialize_target_dcache;
171 _initialize_target_dcache (void)
173 add_setshow_boolean_cmd ("stack-cache", class_support,
174 &stack_cache_enabled_1, _("\
175 Set cache use for stack access."), _("\
176 Show cache use for stack access."), _("\
177 When on, use the target memory cache for all stack access, regardless of any\n\
178 configured memory regions. This improves remote performance significantly.\n\
179 By default, caching for stack access is on."),
182 &setlist, &showlist);
184 add_setshow_boolean_cmd ("code-cache", class_support,
185 &code_cache_enabled_1, _("\
186 Set cache use for code segment access."), _("\
187 Show cache use for code segment access."), _("\
188 When on, use the target memory cache for all code segment accesses,\n\
189 regardless of any configured memory regions. This improves remote\n\
190 performance significantly. By default, caching for code segment\n\
194 &setlist, &showlist);
196 target_dcache_aspace_key
197 = register_address_space_data_with_cleanup (NULL,
198 target_dcache_cleanup);