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[/] [openrisc/] [trunk/] [or1ksim/] [mmu/] [dmmu.h] - Rev 240
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/* dmmu.h -- Data MMU header file Copyright (C) 1999 Damjan Lampret, lampret@opencores.org Copyright (C) 2008 Embecosm Limited Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ #ifndef DMMU__H #define DMMU__H /* Package includes */ #include "sim-config.h" struct dmmu { int enabled; /* Whether DMMU is enabled */ int nways; /* Number of DTLB ways */ int nsets; /* Number of DTLB sets */ int pagesize; /* DTLB page size */ int pagesize_log2; /* DTLB page size (log2(pagesize)) */ oraddr_t page_offset_mask; /* Address mask to get page offset */ oraddr_t page_mask; /* Page number mask (diff. from vpn) */ oraddr_t vpn_mask; /* Address mask to get vpn */ int lru_reload; /* What to reload the lru value to */ oraddr_t set_mask; /* Mask to get set of an address */ int entrysize; /* DTLB entry size */ int ustates; /* number of DTLB usage states */ int missdelay; /* How much cycles does the miss cost */ int hitdelay; /* How much cycles does the hit cost */ }; #define DADDR_PAGE(addr) ((addr) & dmmu_state->page_mask) /* FIXME: Remove the need for this global */ extern struct dmmu *dmmu_state; /* Prototypes for external use */ extern oraddr_t dmmu_translate (oraddr_t virtaddr, int write_access); extern oraddr_t dmmu_simulate_tlb (oraddr_t virtaddr, int write_access); extern oraddr_t peek_into_dtlb (oraddr_t virtaddr, int write_access, int through_dc); extern void reg_dmmu_sec (); #endif /* DMMU__H */
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