LXR qemu/target/nios2/mmu.h

   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
  26typedef struct Nios2TLBEntry {
  27    target_ulong tag;
  28    target_ulong data;
  29} Nios2TLBEntry;
  30
  31typedef 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
  39typedef struct Nios2MMULookup {
  40    target_ulong vaddr;
  41    target_ulong paddr;
  42    int prot;
  43} Nios2MMULookup;
  44
  45void mmu_flip_um(CPUNios2State *env, unsigned int um);
  46unsigned int mmu_translate(CPUNios2State *env,
  47                           Nios2MMULookup *lu,
  48                           target_ulong vaddr, int rw, int mmu_idx);
  49void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v);
  50void mmu_init(CPUNios2State *env);
  51
  52#endif /* NIOS2_MMU_H */
  53