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 ***************************************************************************/
20 #include "armv4_5_cache.h"
25 int armv4_5_identify_cache(u32 cache_type_reg, armv4_5_cache_common_t *cache)
27 int size, assoc, M, len, multiplier;
29 cache->ctype = (cache_type_reg & 0x1e000000U) >> 25;
30 cache->separate = (cache_type_reg & 0x01000000U) >> 24;
32 size = (cache_type_reg & 0x1c0000) >> 18;
33 assoc = (cache_type_reg & 0x38000) >> 15;
34 M = (cache_type_reg & 0x4000) >> 14;
35 len = (cache_type_reg & 0x3000) >> 12;
38 if ((assoc != 0) || (M != 1)) /* assoc 0 and M 1 means cache absent */
40 /* cache is present */
41 cache->d_u_size.linelen = 1 << (len + 3);
42 cache->d_u_size.associativity = multiplier << (assoc - 1);
43 cache->d_u_size.nsets = 1 << (size + 6 - assoc - len);
44 cache->d_u_size.cachesize = multiplier << (size + 8);
49 cache->d_u_size.linelen = -1;
50 cache->d_u_size.associativity = -1;
51 cache->d_u_size.nsets = -1;
52 cache->d_u_size.cachesize = -1;
57 size = (cache_type_reg & 0x1c0) >> 6;
58 assoc = (cache_type_reg & 0x38) >> 3;
59 M = (cache_type_reg & 0x4) >> 2;
60 len = (cache_type_reg & 0x3);
63 if ((assoc != 0) || (M != 1)) /* assoc 0 and M 1 means cache absent */
65 /* cache is present */
66 cache->i_size.linelen = 1 << (len + 3);
67 cache->i_size.associativity = multiplier << (assoc - 1);
68 cache->i_size.nsets = 1 << (size + 6 - assoc - len);
69 cache->i_size.cachesize = multiplier << (size + 8);
74 cache->i_size.linelen = -1;
75 cache->i_size.associativity = -1;
76 cache->i_size.nsets = -1;
77 cache->i_size.cachesize = -1;
82 cache->i_size = cache->d_u_size;
88 int armv4_5_handle_cache_info_command(struct command_context_s *cmd_ctx, armv4_5_cache_common_t *armv4_5_cache)
90 if (armv4_5_cache->ctype == -1)
92 command_print(cmd_ctx, "cache not yet identified");
96 command_print(cmd_ctx, "cache type: 0x%1.1x, %s", armv4_5_cache->ctype,
97 (armv4_5_cache->separate) ? "separate caches" : "unified cache");
99 command_print(cmd_ctx, "D-Cache: linelen %i, associativity %i, nsets %i, cachesize 0x%x",
100 armv4_5_cache->d_u_size.linelen,
101 armv4_5_cache->d_u_size.associativity,
102 armv4_5_cache->d_u_size.nsets,
103 armv4_5_cache->d_u_size.cachesize);
105 command_print(cmd_ctx, "I-Cache: linelen %i, associativity %i, nsets %i, cachesize 0x%x",
106 armv4_5_cache->i_size.linelen,
107 armv4_5_cache->i_size.associativity,
108 armv4_5_cache->i_size.nsets,
109 armv4_5_cache->i_size.cachesize);