mmu.h (1560B)
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 #include "cpu.h" 25 26 typedef struct Nios2TLBEntry { 27 target_ulong tag; 28 target_ulong data; 29 } Nios2TLBEntry; 30 31 typedef struct Nios2MMU { 32 int tlb_entry_mask; 33 uint32_t pteaddr_wr; 34 uint32_t tlbacc_wr; 35 uint32_t tlbmisc_wr; 36 Nios2TLBEntry *tlb; 37 } Nios2MMU; 38 39 typedef struct Nios2MMULookup { 40 target_ulong vaddr; 41 target_ulong paddr; 42 int prot; 43 } Nios2MMULookup; 44 45 void mmu_flip_um(CPUNios2State *env, unsigned int um); 46 unsigned int mmu_translate(CPUNios2State *env, 47 Nios2MMULookup *lu, 48 target_ulong vaddr, int rw, int mmu_idx); 49 void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v); 50 void mmu_init(CPUNios2State *env); 51 52 #endif /* NIOS2_MMU_H */