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 #ifndef MMU_NIOS2_H 21 #define MMU_NIOS2_H 22 23 typedef struct Nios2TLBEntry { 24 target_ulong tag; 25 target_ulong data; 26 } Nios2TLBEntry; 27 28 typedef struct Nios2MMU { 29 int tlb_entry_mask; 30 uint32_t pteaddr_wr; 31 uint32_t tlbacc_wr; 32 uint32_t tlbmisc_wr; 33 Nios2TLBEntry *tlb; 34 } Nios2MMU; 35 36 typedef struct Nios2MMULookup { 37 target_ulong vaddr; 38 target_ulong paddr; 39 int prot; 40 } Nios2MMULookup; 41 42 void mmu_flip_um(CPUNios2State *env, unsigned int um); 43 unsigned int mmu_translate(CPUNios2State *env, 44 Nios2MMULookup *lu, 45 target_ulong vaddr, int rw, int mmu_idx); 46 void mmu_read_debug(CPUNios2State *env, uint32_t rn); 47 void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v); 48 void mmu_init(CPUNios2State *env); 49 50 #endif /* MMU_NIOS2_H */ 51