projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| afeeceb0 EI |
1 | /* |
| 2 | * Microblaze MMU emulation for qemu. | |
| 3 | * | |
| 4 | * Copyright (c) 2009 Edgar E. Iglesias | |
| 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 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 | |
| 8167ee88 | 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| afeeceb0 EI |
18 | */ |
| 19 | ||
| 20 | #define MMU_R_PID 0 | |
| 21 | #define MMU_R_ZPR 1 | |
| 22 | #define MMU_R_TLBX 2 | |
| 23 | #define MMU_R_TLBLO 3 | |
| 24 | #define MMU_R_TLBHI 4 | |
| 25 | #define MMU_R_TLBSX 5 | |
| 26 | ||
| 27 | #define RAM_DATA 1 | |
| 28 | #define RAM_TAG 0 | |
| 29 | ||
| 30 | /* Tag portion */ | |
| 31 | #define TLB_EPN_MASK 0xFFFFFC00 /* Effective Page Number */ | |
| 32 | #define TLB_PAGESZ_MASK 0x00000380 | |
| 33 | #define TLB_PAGESZ(x) (((x) & 0x7) << 7) | |
| 34 | #define PAGESZ_1K 0 | |
| 35 | #define PAGESZ_4K 1 | |
| 36 | #define PAGESZ_16K 2 | |
| 37 | #define PAGESZ_64K 3 | |
| 38 | #define PAGESZ_256K 4 | |
| 39 | #define PAGESZ_1M 5 | |
| 40 | #define PAGESZ_4M 6 | |
| 41 | #define PAGESZ_16M 7 | |
| 42 | #define TLB_VALID 0x00000040 /* Entry is valid */ | |
| 43 | ||
| 44 | /* Data portion */ | |
| 45 | #define TLB_RPN_MASK 0xFFFFFC00 /* Real Page Number */ | |
| 46 | #define TLB_PERM_MASK 0x00000300 | |
| 47 | #define TLB_EX 0x00000200 /* Instruction execution allowed */ | |
| 48 | #define TLB_WR 0x00000100 /* Writes permitted */ | |
| 49 | #define TLB_ZSEL_MASK 0x000000F0 | |
| 50 | #define TLB_ZSEL(x) (((x) & 0xF) << 4) | |
| 51 | #define TLB_ATTR_MASK 0x0000000F | |
| 52 | #define TLB_W 0x00000008 /* Caching is write-through */ | |
| 53 | #define TLB_I 0x00000004 /* Caching is inhibited */ | |
| 54 | #define TLB_M 0x00000002 /* Memory is coherent */ | |
| 55 | #define TLB_G 0x00000001 /* Memory is guarded from prefetch */ | |
| 56 | ||
| 57 | #define TLB_ENTRIES 64 | |
| 58 | ||
| 59 | struct microblaze_mmu | |
| 60 | { | |
| 61 | /* Data and tag brams. */ | |
| 62 | uint32_t rams[2][TLB_ENTRIES]; | |
| 63 | /* We keep a separate ram for the tids to avoid the 48 bit tag width. */ | |
| 64 | uint8_t tids[TLB_ENTRIES]; | |
| 65 | /* Control flops. */ | |
| 3c50a71f EI |
66 | uint32_t regs[8]; |
| 67 | ||
| 68 | int c_mmu; | |
| 69 | int c_mmu_tlb_access; | |
| 70 | int c_mmu_zones; | |
| afeeceb0 EI |
71 | }; |
| 72 | ||
| 73 | struct microblaze_mmu_lookup | |
| 74 | { | |
| 75 | uint32_t paddr; | |
| 76 | uint32_t vaddr; | |
| 77 | unsigned int size; | |
| 78 | unsigned int idx; | |
| 79 | int prot; | |
| 80 | enum { | |
| 81 | ERR_PROT, ERR_MISS, ERR_HIT | |
| 82 | } err; | |
| 83 | }; | |
| 84 | ||
| afeeceb0 EI |
85 | unsigned int mmu_translate(struct microblaze_mmu *mmu, |
| 86 | struct microblaze_mmu_lookup *lu, | |
| 87 | target_ulong vaddr, int rw, int mmu_idx); | |
| 68cee38a AF |
88 | uint32_t mmu_read(CPUMBState *env, uint32_t rn); |
| 89 | void mmu_write(CPUMBState *env, uint32_t rn, uint32_t v); | |
| afeeceb0 | 90 | void mmu_init(struct microblaze_mmu *mmu); |