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Last change
on this file since 604 was
604,
checked in by devigne, 10 years ago
|
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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.
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File size:
1.4 KB
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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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