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
  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 */