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3863585b WD |
1 | /* |
2 | * (C) Copyright 2000 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Cache support: switch on or off, get status | |
26 | */ | |
27 | #include <common.h> | |
28 | #include <command.h> | |
d0c4c338 | 29 | #include <linux/compiler.h> |
3863585b | 30 | |
d0c4c338 MM |
31 | static int parse_argv(const char *); |
32 | ||
23498935 | 33 | void __weak invalidate_icache_all(void) |
d0c4c338 | 34 | { |
23498935 SK |
35 | /* please define arch specific invalidate_icache_all */ |
36 | puts("No arch specific invalidate_icache_all available!\n"); | |
d0c4c338 | 37 | } |
3863585b | 38 | |
e9455fcc | 39 | int do_icache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
3863585b WD |
40 | { |
41 | switch (argc) { | |
42 | case 2: /* on / off */ | |
d0c4c338 | 43 | switch (parse_argv(argv[1])) { |
e9455fcc JH |
44 | case 0: |
45 | icache_disable(); | |
3863585b | 46 | break; |
e9455fcc JH |
47 | case 1: |
48 | icache_enable(); | |
3863585b | 49 | break; |
e9455fcc JH |
50 | case 2: |
51 | invalidate_icache_all(); | |
d0c4c338 | 52 | break; |
3863585b | 53 | } |
36180d96 | 54 | break; |
3863585b | 55 | case 1: /* get status */ |
e9455fcc | 56 | printf("Instruction Cache is %s\n", |
3863585b WD |
57 | icache_status() ? "ON" : "OFF"); |
58 | return 0; | |
59 | default: | |
4c12eeb8 | 60 | return CMD_RET_USAGE; |
3863585b WD |
61 | } |
62 | return 0; | |
63 | } | |
64 | ||
23498935 | 65 | void __weak flush_dcache_all(void) |
d0c4c338 | 66 | { |
23498935 SK |
67 | puts("No arch specific flush_dcache_all available!\n"); |
68 | /* please define arch specific flush_dcache_all */ | |
d0c4c338 MM |
69 | } |
70 | ||
e9455fcc | 71 | int do_dcache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
3863585b WD |
72 | { |
73 | switch (argc) { | |
e9455fcc | 74 | case 2: /* on / off */ |
d0c4c338 | 75 | switch (parse_argv(argv[1])) { |
e9455fcc JH |
76 | case 0: |
77 | dcache_disable(); | |
3863585b | 78 | break; |
e9455fcc JH |
79 | case 1: |
80 | dcache_enable(); | |
3863585b | 81 | break; |
e9455fcc JH |
82 | case 2: |
83 | flush_dcache_all(); | |
d0c4c338 | 84 | break; |
3863585b | 85 | } |
e9455fcc | 86 | break; |
3863585b | 87 | case 1: /* get status */ |
e9455fcc | 88 | printf("Data (writethrough) Cache is %s\n", |
3863585b WD |
89 | dcache_status() ? "ON" : "OFF"); |
90 | return 0; | |
91 | default: | |
4c12eeb8 | 92 | return CMD_RET_USAGE; |
3863585b WD |
93 | } |
94 | return 0; | |
3863585b WD |
95 | } |
96 | ||
d0c4c338 | 97 | static int parse_argv(const char *s) |
3863585b | 98 | { |
e9455fcc JH |
99 | if (strcmp(s, "flush") == 0) |
100 | return 2; | |
101 | else if (strcmp(s, "on") == 0) | |
102 | return 1; | |
103 | else if (strcmp(s, "off") == 0) | |
104 | return 0; | |
105 | ||
106 | return -1; | |
3863585b WD |
107 | } |
108 | ||
8bde7f77 | 109 | |
0d498393 WD |
110 | U_BOOT_CMD( |
111 | icache, 2, 1, do_icache, | |
2fb2604d | 112 | "enable or disable instruction cache", |
d0c4c338 MM |
113 | "[on, off, flush]\n" |
114 | " - enable, disable, or flush instruction cache" | |
8bde7f77 WD |
115 | ); |
116 | ||
0d498393 WD |
117 | U_BOOT_CMD( |
118 | dcache, 2, 1, do_dcache, | |
2fb2604d | 119 | "enable or disable data cache", |
d0c4c338 MM |
120 | "[on, off, flush]\n" |
121 | " - enable, disable, or flush data (writethrough) cache" | |
8bde7f77 | 122 | ); |