1 |
19 |
jeremybenn |
/* dmmu.h -- Data MMU header file
|
2 |
|
|
|
3 |
|
|
Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
|
4 |
|
|
Copyright (C) 2008 Embecosm Limited
|
5 |
|
|
|
6 |
|
|
Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
|
7 |
|
|
|
8 |
|
|
This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator.
|
9 |
|
|
|
10 |
|
|
This program is free software; you can redistribute it and/or modify it
|
11 |
|
|
under the terms of the GNU General Public License as published by the Free
|
12 |
|
|
Software Foundation; either version 3 of the License, or (at your option)
|
13 |
|
|
any later version.
|
14 |
|
|
|
15 |
|
|
This program is distributed in the hope that it will be useful, but WITHOUT
|
16 |
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
17 |
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
18 |
|
|
more details.
|
19 |
|
|
|
20 |
|
|
You should have received a copy of the GNU General Public License along
|
21 |
|
|
with this program. If not, see <http://www.gnu.org/licenses/>. */
|
22 |
|
|
|
23 |
|
|
/* This program is commented throughout in a fashion suitable for processing
|
24 |
|
|
with Doxygen. */
|
25 |
|
|
|
26 |
|
|
|
27 |
|
|
#ifndef DMMU__H
|
28 |
|
|
#define DMMU__H
|
29 |
|
|
|
30 |
|
|
/* Package includes */
|
31 |
|
|
#include "sim-config.h"
|
32 |
|
|
|
33 |
|
|
struct dmmu
|
34 |
|
|
{
|
35 |
|
|
int enabled; /* Whether DMMU is enabled */
|
36 |
|
|
int nways; /* Number of DTLB ways */
|
37 |
|
|
int nsets; /* Number of DTLB sets */
|
38 |
|
|
int pagesize; /* DTLB page size */
|
39 |
|
|
int pagesize_log2; /* DTLB page size (log2(pagesize)) */
|
40 |
|
|
oraddr_t page_offset_mask; /* Address mask to get page offset */
|
41 |
|
|
oraddr_t page_mask; /* Page number mask (diff. from vpn) */
|
42 |
|
|
oraddr_t vpn_mask; /* Address mask to get vpn */
|
43 |
|
|
int lru_reload; /* What to reload the lru value to */
|
44 |
|
|
oraddr_t set_mask; /* Mask to get set of an address */
|
45 |
|
|
int entrysize; /* DTLB entry size */
|
46 |
|
|
int ustates; /* number of DTLB usage states */
|
47 |
|
|
int missdelay; /* How much cycles does the miss cost */
|
48 |
|
|
int hitdelay; /* How much cycles does the hit cost */
|
49 |
|
|
};
|
50 |
|
|
|
51 |
|
|
#define DADDR_PAGE(addr) ((addr) & dmmu_state->page_mask)
|
52 |
|
|
|
53 |
|
|
/* FIXME: Remove the need for this global */
|
54 |
|
|
extern struct dmmu *dmmu_state;
|
55 |
|
|
|
56 |
|
|
/* Prototypes for external use */
|
57 |
|
|
extern oraddr_t dmmu_translate (oraddr_t virtaddr,
|
58 |
|
|
int write_access);
|
59 |
|
|
extern oraddr_t dmmu_simulate_tlb (oraddr_t virtaddr,
|
60 |
|
|
int write_access);
|
61 |
|
|
extern oraddr_t peek_into_dtlb (oraddr_t virtaddr,
|
62 |
|
|
int write_access,
|
63 |
|
|
int through_dc);
|
64 |
|
|
extern void reg_dmmu_sec ();
|
65 |
|
|
|
66 |
|
|
#endif /* DMMU__H */
|