113 lines
4.0 KiB
C
113 lines
4.0 KiB
C
/***************************************************************************
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* Copyright (C) 2005 by Dominic Rath *
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* Dominic.Rath@gmx.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include "armv4_5_cache.h"
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#include "log.h"
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#include "command.h"
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int armv4_5_identify_cache(u32 cache_type_reg, armv4_5_cache_common_t *cache)
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{
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int size, assoc, M, len, multiplier;
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cache->ctype = (cache_type_reg & 0x1e000000U) >> 25;
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cache->separate = (cache_type_reg & 0x01000000U) >> 24;
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size = (cache_type_reg & 0x1c0000) >> 18;
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assoc = (cache_type_reg & 0x38000) >> 15;
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M = (cache_type_reg & 0x4000) >> 14;
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len = (cache_type_reg & 0x3000) >> 12;
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multiplier = 2 + M;
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if ((assoc != 0) || (M != 1)) /* assoc 0 and M 1 means cache absent */
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{
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/* cache is present */
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cache->d_u_size.linelen = 1 << (len + 3);
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cache->d_u_size.associativity = multiplier << (assoc - 1);
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cache->d_u_size.nsets = 1 << (size + 6 - assoc - len);
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cache->d_u_size.cachesize = multiplier << (size + 8);
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}
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else
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{
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/* cache is absent */
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cache->d_u_size.linelen = -1;
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cache->d_u_size.associativity = -1;
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cache->d_u_size.nsets = -1;
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cache->d_u_size.cachesize = -1;
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}
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if (cache->separate)
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{
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size = (cache_type_reg & 0x1c0) >> 6;
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assoc = (cache_type_reg & 0x38) >> 3;
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M = (cache_type_reg & 0x4) >> 2;
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len = (cache_type_reg & 0x3);
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multiplier = 2 + M;
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if ((assoc != 0) || (M != 1)) /* assoc 0 and M 1 means cache absent */
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{
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/* cache is present */
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cache->i_size.linelen = 1 << (len + 3);
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cache->i_size.associativity = multiplier << (assoc - 1);
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cache->i_size.nsets = 1 << (size + 6 - assoc - len);
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cache->i_size.cachesize = multiplier << (size + 8);
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}
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else
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{
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/* cache is absent */
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cache->i_size.linelen = -1;
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cache->i_size.associativity = -1;
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cache->i_size.nsets = -1;
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cache->i_size.cachesize = -1;
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}
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}
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else
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{
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cache->i_size = cache->d_u_size;
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}
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return ERROR_OK;
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}
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int armv4_5_handle_cache_info_command(struct command_context_s *cmd_ctx, armv4_5_cache_common_t *armv4_5_cache)
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{
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if (armv4_5_cache->ctype == -1)
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{
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command_print(cmd_ctx, "cache not yet identified");
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return ERROR_OK;
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}
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command_print(cmd_ctx, "cache type: 0x%1.1x, %s", armv4_5_cache->ctype,
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(armv4_5_cache->separate) ? "separate caches" : "unified cache");
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command_print(cmd_ctx, "D-Cache: linelen %i, associativity %i, nsets %i, cachesize 0x%x",
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armv4_5_cache->d_u_size.linelen,
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armv4_5_cache->d_u_size.associativity,
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armv4_5_cache->d_u_size.nsets,
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armv4_5_cache->d_u_size.cachesize);
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command_print(cmd_ctx, "I-Cache: linelen %i, associativity %i, nsets %i, cachesize 0x%x",
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armv4_5_cache->i_size.linelen,
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armv4_5_cache->i_size.associativity,
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armv4_5_cache->i_size.nsets,
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armv4_5_cache->i_size.cachesize);
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return ERROR_OK;
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}
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