1. /*
2.  * (C) Copyright 2000
3.  * Wolfgang Denk, DENX Software Engineering, [email protected].
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>
29.  
30. #if defined(CONFIG_CMD_CACHE)
31.  
32. static int on_off (const char *);
33.  
34. int do_icache ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
35. {
36.         switch (argc) {
37.         case 2:                 /* on / off     */
38.                 switch (on_off(argv[1])) {
39. #if 0   /* prevented by varargs handling; FALLTROUGH is harmless, too */
40.                 default: cmd_usage(cmdtp);
41.                         return;
42. #endif
43.                 case 0: icache_disable();
44.                         break;
45.                 case 1: icache_enable ();
46.                         break;
47.                 }
48.                 /* FALL TROUGH */
49.         case 1:                 /* get status */
50.                 printf ("Instruction Cache is %s\n",
51.                         icache_status() ? "ON" : "OFF");
52.                 return 0;
53.         default:
54.                 cmd_usage(cmdtp);
55.                 return 1;
56.         }
57.         return 0;
58. }
59.  
60. int do_dcache ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
61. {
62.         switch (argc) {
63.         case 2:                 /* on / off     */
64.                 switch (on_off(argv[1])) {
65. #if 0   /* prevented by varargs handling; FALLTROUGH is harmless, too */
66.                 default: cmd_usage(cmdtp);
67.                         return;
68. #endif
69.                 case 0: dcache_disable();
70.                         break;
71.                 case 1: dcache_enable ();
72.                         break;
73.                 }
74.                 /* FALL TROUGH */
75.         case 1:                 /* get status */
76.                 printf ("Data (writethrough) Cache is %s\n",
77.                         dcache_status() ? "ON" : "OFF");
78.                 return 0;
79.         default:
80.                 cmd_usage(cmdtp);
81.                 return 1;
82.         }
83.         return 0;
84.  
85. }
86.  
87. static int on_off (const char *s)
88. {
89.         if (strcmp(s, "on") == 0) {
90.                 return (1);
91.         } else if (strcmp(s, "off") == 0) {
92.                 return (0);
93.         }
94.         return (-1);
95. }
96.  
97.  
98. U_BOOT_CMD(
99.         icache,   2,   1,     do_icache,
100.         "enable or disable instruction cache",
101.         "[on, off]\n"
102.         "    - enable or disable instruction cache"
103. );
104.  
105. U_BOOT_CMD(
106.         dcache,   2,   1,     do_dcache,
107.         "enable or disable data cache",
108.         "[on, off]\n"
109.         "    - enable or disable data (writethrough) cache"
110. );
111.  
112. #endif
113.