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/*
* Altera Nios II MMU emulation for qemu.
*
* Copyright (C) 2012 Chris Wulff <crwulff@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#ifndef NIOS2_MMU_H
#define NIOS2_MMU_H
#include "cpu.h"
typedef struct Nios2TLBEntry {
target_ulong tag;
target_ulong data;
} Nios2TLBEntry;
typedef struct Nios2MMU {
int tlb_entry_mask;
uint32_t pteaddr_wr;
uint32_t tlbacc_wr;
uint32_t tlbmisc_wr;
Nios2TLBEntry *tlb;
} Nios2MMU;
typedef struct Nios2MMULookup {
target_ulong vaddr;
target_ulong paddr;
int prot;
} Nios2MMULookup;
void mmu_flip_um(CPUNios2State *env, unsigned int um);
unsigned int mmu_translate(CPUNios2State *env,
Nios2MMULookup *lu,
target_ulong vaddr, int rw, int mmu_idx);
void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v);
void mmu_init(CPUNios2State *env);
#endif /* NIOS2_MMU_H */
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