1 | /* |
2 | * Altera Nios II MMU emulation for qemu. |
3 | * |
4 | * Copyright (C) 2012 Chris Wulff <crwulff@gmail.com> |
5 | * |
6 | * This library is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Lesser General Public |
8 | * License as published by the Free Software Foundation; either |
9 | * version 2.1 of the License, or (at your option) any later version. |
10 | * |
11 | * This library is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | * Lesser General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU Lesser General Public |
17 | * License along with this library; if not, see |
18 | * <http://www.gnu.org/licenses/lgpl-2.1.html> |
19 | */ |
20 | |
21 | #ifndef NIOS2_MMU_H |
22 | #define NIOS2_MMU_H |
23 | |
24 | typedef struct Nios2TLBEntry { |
25 | target_ulong tag; |
26 | target_ulong data; |
27 | } Nios2TLBEntry; |
28 | |
29 | typedef struct Nios2MMU { |
30 | int tlb_entry_mask; |
31 | uint32_t pteaddr_wr; |
32 | uint32_t tlbacc_wr; |
33 | uint32_t tlbmisc_wr; |
34 | Nios2TLBEntry *tlb; |
35 | } Nios2MMU; |
36 | |
37 | typedef struct Nios2MMULookup { |
38 | target_ulong vaddr; |
39 | target_ulong paddr; |
40 | int prot; |
41 | } Nios2MMULookup; |
42 | |
43 | void mmu_flip_um(CPUNios2State *env, unsigned int um); |
44 | unsigned int mmu_translate(CPUNios2State *env, |
45 | Nios2MMULookup *lu, |
46 | target_ulong vaddr, int rw, int mmu_idx); |
47 | void mmu_read_debug(CPUNios2State *env, uint32_t rn); |
48 | void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v); |
49 | void mmu_init(CPUNios2State *env); |
50 | |
51 | #endif /* NIOS2_MMU_H */ |
52 | |