1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
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 2 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, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
24 #include "armv4_5_cache.h"
29 int armv4_5_identify_cache(u32 cache_type_reg
, armv4_5_cache_common_t
*cache
)
31 int size
, assoc
, M
, len
, multiplier
;
33 cache
->ctype
= (cache_type_reg
& 0x1e000000U
) >> 25;
34 cache
->separate
= (cache_type_reg
& 0x01000000U
) >> 24;
36 size
= (cache_type_reg
& 0x1c0000) >> 18;
37 assoc
= (cache_type_reg
& 0x38000) >> 15;
38 M
= (cache_type_reg
& 0x4000) >> 14;
39 len
= (cache_type_reg
& 0x3000) >> 12;
42 if ((assoc
!= 0) || (M
!= 1)) /* assoc 0 and M 1 means cache absent */
44 /* cache is present */
45 cache
->d_u_size
.linelen
= 1 << (len
+ 3);
46 cache
->d_u_size
.associativity
= multiplier
<< (assoc
- 1);
47 cache
->d_u_size
.nsets
= 1 << (size
+ 6 - assoc
- len
);
48 cache
->d_u_size
.cachesize
= multiplier
<< (size
+ 8);
53 cache
->d_u_size
.linelen
= -1;
54 cache
->d_u_size
.associativity
= -1;
55 cache
->d_u_size
.nsets
= -1;
56 cache
->d_u_size
.cachesize
= -1;
61 size
= (cache_type_reg
& 0x1c0) >> 6;
62 assoc
= (cache_type_reg
& 0x38) >> 3;
63 M
= (cache_type_reg
& 0x4) >> 2;
64 len
= (cache_type_reg
& 0x3);
67 if ((assoc
!= 0) || (M
!= 1)) /* assoc 0 and M 1 means cache absent */
69 /* cache is present */
70 cache
->i_size
.linelen
= 1 << (len
+ 3);
71 cache
->i_size
.associativity
= multiplier
<< (assoc
- 1);
72 cache
->i_size
.nsets
= 1 << (size
+ 6 - assoc
- len
);
73 cache
->i_size
.cachesize
= multiplier
<< (size
+ 8);
78 cache
->i_size
.linelen
= -1;
79 cache
->i_size
.associativity
= -1;
80 cache
->i_size
.nsets
= -1;
81 cache
->i_size
.cachesize
= -1;
86 cache
->i_size
= cache
->d_u_size
;
92 int armv4_5_handle_cache_info_command(struct command_context_s
*cmd_ctx
, armv4_5_cache_common_t
*armv4_5_cache
)
94 if (armv4_5_cache
->ctype
== -1)
96 command_print(cmd_ctx
, "cache not yet identified");
100 command_print(cmd_ctx
, "cache type: 0x%1.1x, %s", armv4_5_cache
->ctype
,
101 (armv4_5_cache
->separate
) ? "separate caches" : "unified cache");
103 command_print(cmd_ctx
, "D-Cache: linelen %i, associativity %i, nsets %i, cachesize 0x%x",
104 armv4_5_cache
->d_u_size
.linelen
,
105 armv4_5_cache
->d_u_size
.associativity
,
106 armv4_5_cache
->d_u_size
.nsets
,
107 armv4_5_cache
->d_u_size
.cachesize
);
109 command_print(cmd_ctx
, "I-Cache: linelen %i, associativity %i, nsets %i, cachesize 0x%x",
110 armv4_5_cache
->i_size
.linelen
,
111 armv4_5_cache
->i_size
.associativity
,
112 armv4_5_cache
->i_size
.nsets
,
113 armv4_5_cache
->i_size
.cachesize
);