Last change
on this file since 605 was
604,
checked in by devigne, 11 years ago
|
Merge with the latest trunk (concurrent access to a register CONFIG_FSM)
Modification processing software invalidations to memcache level.
When a software memcache invalidation, it does not write the dirty data in the
XRAM (and therefore does not reserve space in the TRT). This poses a problem
when processing CLEANUP_DATA on a line NCC because CLEANUP_FSM expects to find
a placeholder in the TRT.
To overcome this problem, the flit DSPIN a multi-inval now contains a bit to
indicate that the invalidation from a control configuration (software
invalidation level memcache).
At the reception of this message invalidation in the L1 cache, it retrieves the
value of the field DSPIN IS_CONFIG. When processing invalidation (
DCACHE_CC_INVAL ), the value of this field is checked. Two scenarios are
possible:
- 1st case : The INVAL concerns a line NCC but not from a software invalidation
(IS_CONFIG = 0), the CLEANUP sent then follows the classical treatment of
invalidation of a line NCC (sends a CLEANUP_NCC with or without data).
- 2nd case : The INVAL provides a line NCC from a software invalidation
(IS_CONFIG = 1) : same treatment as was CLEANUP line CC.
Thus in the case of interest (software invalidation on a line NCC), the CLEANUP
received by the memcache will be treated as one line CC.
|
File size:
1.4 KB
|
Line | |
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1 | /* |
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2 | * SOCLIB_LGPL_HEADER_BEGIN |
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3 | * |
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4 | * This file is part of SoCLib, GNU LGPLv2.1. |
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5 | * |
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6 | * SoCLib is free software; you can redistribute it and/or modify it |
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7 | * under the terms of the GNU Lesser General Public License as published |
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8 | * by the Free Software Foundation; version 2.1 of the License. |
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9 | * |
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10 | * SoCLib is distributed in the hope that it will be useful, but |
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11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 | * Lesser General Public License for more details. |
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14 | * |
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15 | * You should have received a copy of the GNU Lesser General Public |
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16 | * License along with SoCLib; if not, write to the Free Software |
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17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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18 | * 02110-1301 USA |
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19 | * |
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20 | * SOCLIB_LGPL_HEADER_END |
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21 | * |
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22 | * Copyright (c) UPMC, Lip6, Asim |
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23 | * alain greiner |
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24 | * |
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25 | * Maintainers: alain |
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26 | */ |
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27 | #ifndef MEM_CACHE_REGS_H |
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28 | #define MEM_CACHE_REGS_H |
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29 | |
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30 | enum SoclibMemCacheConfigRegs |
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31 | { |
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32 | MEMC_LOCK, |
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33 | MEMC_ADDR_LO, |
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34 | MEMC_ADDR_HI, |
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35 | MEMC_BUF_LENGTH, |
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36 | MEMC_CMD_TYPE |
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37 | }; |
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38 | |
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39 | enum SoclibMemCacheConfigCmd |
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40 | { |
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41 | MEMC_CMD_NOP, |
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42 | MEMC_CMD_INVAL, |
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43 | MEMC_CMD_SYNC |
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44 | }; |
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45 | |
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46 | #endif /* MEM_CACHE_REGS_H */ |
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47 | |
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48 | // Local Variables: |
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49 | // tab-width: 4 |
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50 | // c-basic-offset: 4 |
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51 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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52 | // indent-tabs-mode: nil |
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53 | // End: |
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54 | |
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55 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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56 | |
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