root / target-microblaze / mmu.h @ a8a358bf
History | View | Annotate | Download (2.9 kB)
1 | afeeceb0 | Edgar E. Iglesias | /*
|
---|---|---|---|
2 | afeeceb0 | Edgar E. Iglesias | * Microblaze MMU emulation for qemu.
|
3 | afeeceb0 | Edgar E. Iglesias | *
|
4 | afeeceb0 | Edgar E. Iglesias | * Copyright (c) 2009 Edgar E. Iglesias
|
5 | afeeceb0 | Edgar E. Iglesias | *
|
6 | afeeceb0 | Edgar E. Iglesias | * This library is free software; you can redistribute it and/or
|
7 | afeeceb0 | Edgar E. Iglesias | * modify it under the terms of the GNU Lesser General Public
|
8 | afeeceb0 | Edgar E. Iglesias | * License as published by the Free Software Foundation; either
|
9 | afeeceb0 | Edgar E. Iglesias | * version 2 of the License, or (at your option) any later version.
|
10 | afeeceb0 | Edgar E. Iglesias | *
|
11 | afeeceb0 | Edgar E. Iglesias | * This library is distributed in the hope that it will be useful,
|
12 | afeeceb0 | Edgar E. Iglesias | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 | afeeceb0 | Edgar E. Iglesias | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 | afeeceb0 | Edgar E. Iglesias | * Lesser General Public License for more details.
|
15 | afeeceb0 | Edgar E. Iglesias | *
|
16 | afeeceb0 | Edgar E. Iglesias | * You should have received a copy of the GNU Lesser General Public
|
17 | 8167ee88 | Blue Swirl | * License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
18 | afeeceb0 | Edgar E. Iglesias | */
|
19 | afeeceb0 | Edgar E. Iglesias | |
20 | afeeceb0 | Edgar E. Iglesias | #define MMU_R_PID 0 |
21 | afeeceb0 | Edgar E. Iglesias | #define MMU_R_ZPR 1 |
22 | afeeceb0 | Edgar E. Iglesias | #define MMU_R_TLBX 2 |
23 | afeeceb0 | Edgar E. Iglesias | #define MMU_R_TLBLO 3 |
24 | afeeceb0 | Edgar E. Iglesias | #define MMU_R_TLBHI 4 |
25 | afeeceb0 | Edgar E. Iglesias | #define MMU_R_TLBSX 5 |
26 | afeeceb0 | Edgar E. Iglesias | |
27 | afeeceb0 | Edgar E. Iglesias | #define RAM_DATA 1 |
28 | afeeceb0 | Edgar E. Iglesias | #define RAM_TAG 0 |
29 | afeeceb0 | Edgar E. Iglesias | |
30 | afeeceb0 | Edgar E. Iglesias | /* Tag portion */
|
31 | afeeceb0 | Edgar E. Iglesias | #define TLB_EPN_MASK 0xFFFFFC00 /* Effective Page Number */ |
32 | afeeceb0 | Edgar E. Iglesias | #define TLB_PAGESZ_MASK 0x00000380 |
33 | afeeceb0 | Edgar E. Iglesias | #define TLB_PAGESZ(x) (((x) & 0x7) << 7) |
34 | afeeceb0 | Edgar E. Iglesias | #define PAGESZ_1K 0 |
35 | afeeceb0 | Edgar E. Iglesias | #define PAGESZ_4K 1 |
36 | afeeceb0 | Edgar E. Iglesias | #define PAGESZ_16K 2 |
37 | afeeceb0 | Edgar E. Iglesias | #define PAGESZ_64K 3 |
38 | afeeceb0 | Edgar E. Iglesias | #define PAGESZ_256K 4 |
39 | afeeceb0 | Edgar E. Iglesias | #define PAGESZ_1M 5 |
40 | afeeceb0 | Edgar E. Iglesias | #define PAGESZ_4M 6 |
41 | afeeceb0 | Edgar E. Iglesias | #define PAGESZ_16M 7 |
42 | afeeceb0 | Edgar E. Iglesias | #define TLB_VALID 0x00000040 /* Entry is valid */ |
43 | afeeceb0 | Edgar E. Iglesias | |
44 | afeeceb0 | Edgar E. Iglesias | /* Data portion */
|
45 | afeeceb0 | Edgar E. Iglesias | #define TLB_RPN_MASK 0xFFFFFC00 /* Real Page Number */ |
46 | afeeceb0 | Edgar E. Iglesias | #define TLB_PERM_MASK 0x00000300 |
47 | afeeceb0 | Edgar E. Iglesias | #define TLB_EX 0x00000200 /* Instruction execution allowed */ |
48 | afeeceb0 | Edgar E. Iglesias | #define TLB_WR 0x00000100 /* Writes permitted */ |
49 | afeeceb0 | Edgar E. Iglesias | #define TLB_ZSEL_MASK 0x000000F0 |
50 | afeeceb0 | Edgar E. Iglesias | #define TLB_ZSEL(x) (((x) & 0xF) << 4) |
51 | afeeceb0 | Edgar E. Iglesias | #define TLB_ATTR_MASK 0x0000000F |
52 | afeeceb0 | Edgar E. Iglesias | #define TLB_W 0x00000008 /* Caching is write-through */ |
53 | afeeceb0 | Edgar E. Iglesias | #define TLB_I 0x00000004 /* Caching is inhibited */ |
54 | afeeceb0 | Edgar E. Iglesias | #define TLB_M 0x00000002 /* Memory is coherent */ |
55 | afeeceb0 | Edgar E. Iglesias | #define TLB_G 0x00000001 /* Memory is guarded from prefetch */ |
56 | afeeceb0 | Edgar E. Iglesias | |
57 | afeeceb0 | Edgar E. Iglesias | #define TLB_ENTRIES 64 |
58 | afeeceb0 | Edgar E. Iglesias | |
59 | afeeceb0 | Edgar E. Iglesias | struct microblaze_mmu
|
60 | afeeceb0 | Edgar E. Iglesias | { |
61 | afeeceb0 | Edgar E. Iglesias | /* Data and tag brams. */
|
62 | afeeceb0 | Edgar E. Iglesias | uint32_t rams[2][TLB_ENTRIES];
|
63 | afeeceb0 | Edgar E. Iglesias | /* We keep a separate ram for the tids to avoid the 48 bit tag width. */
|
64 | afeeceb0 | Edgar E. Iglesias | uint8_t tids[TLB_ENTRIES]; |
65 | afeeceb0 | Edgar E. Iglesias | /* Control flops. */
|
66 | afeeceb0 | Edgar E. Iglesias | uint32_t regs[8];;
|
67 | afeeceb0 | Edgar E. Iglesias | }; |
68 | afeeceb0 | Edgar E. Iglesias | |
69 | afeeceb0 | Edgar E. Iglesias | struct microblaze_mmu_lookup
|
70 | afeeceb0 | Edgar E. Iglesias | { |
71 | afeeceb0 | Edgar E. Iglesias | uint32_t paddr; |
72 | afeeceb0 | Edgar E. Iglesias | uint32_t vaddr; |
73 | afeeceb0 | Edgar E. Iglesias | unsigned int size; |
74 | afeeceb0 | Edgar E. Iglesias | unsigned int idx; |
75 | afeeceb0 | Edgar E. Iglesias | int prot;
|
76 | afeeceb0 | Edgar E. Iglesias | enum {
|
77 | afeeceb0 | Edgar E. Iglesias | ERR_PROT, ERR_MISS, ERR_HIT |
78 | afeeceb0 | Edgar E. Iglesias | } err; |
79 | afeeceb0 | Edgar E. Iglesias | }; |
80 | afeeceb0 | Edgar E. Iglesias | |
81 | afeeceb0 | Edgar E. Iglesias | void mmu_flip_um(CPUState *env, unsigned int um); |
82 | afeeceb0 | Edgar E. Iglesias | unsigned int mmu_translate(struct microblaze_mmu *mmu, |
83 | afeeceb0 | Edgar E. Iglesias | struct microblaze_mmu_lookup *lu,
|
84 | afeeceb0 | Edgar E. Iglesias | target_ulong vaddr, int rw, int mmu_idx); |
85 | afeeceb0 | Edgar E. Iglesias | uint32_t mmu_read(CPUState *env, uint32_t rn); |
86 | afeeceb0 | Edgar E. Iglesias | void mmu_write(CPUState *env, uint32_t rn, uint32_t v);
|
87 | afeeceb0 | Edgar E. Iglesias | void mmu_init(struct microblaze_mmu *mmu); |