target-openrisc/mmu_helper.c

   1 /*
   2  * OpenRISC MMU helper routines
   3  *
   4  * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
   5  *                         Zhizhou Zhang <etouzh@gmail.com>
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "cpu.h"
  22
  23 #ifndef CONFIG_USER_ONLY
  24 #include "softmmu_exec.h"
  25 #define MMUSUFFIX _mmu
  26
  27 #define SHIFT 0
  28 #include "softmmu_template.h"
  29
  30 #define SHIFT 1
  31 #include "softmmu_template.h"
  32
  33 #define SHIFT 2
  34 #include "softmmu_template.h"
  35
  36 #define SHIFT 3
  37 #include "softmmu_template.h"
  38
  39 void tlb_fill(CPUOpenRISCState *env, target_ulong addr, int is_write,
  40               int mmu_idx, uintptr_t retaddr)
  41 {
  42     TranslationBlock *tb;
  43     unsigned long pc;
  44     int ret;
  45
  46     ret = cpu_openrisc_handle_mmu_fault(env, addr, is_write, mmu_idx);
  47
  48     if (ret) {
  49         if (retaddr) {
  50             /* now we have a real cpu fault.  */
  51             pc = (unsigned long)retaddr;
  52             tb = tb_find_pc(pc);
  53             if (tb) {
  54                 /* the PC is inside the translated code. It means that we
  55                    have a virtual CPU fault.  */
  56                 cpu_restore_state(tb, env, pc);
  57             }
  58         }
  59         /* Raise Exception.  */
  60         cpu_loop_exit(env);
  61     }
  62 }
  63 #endif