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 #include "exec/cpu_ldst.h"
  23
  24 #ifndef CONFIG_USER_ONLY
  25
  26 void tlb_fill(CPUState *cs, target_ulong addr, int is_write,
  27               int mmu_idx, uintptr_t retaddr)
  28 {
  29     int ret;
  30
  31     ret = openrisc_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx);
  32
  33     if (ret) {
  34         if (retaddr) {
  35             /* now we have a real cpu fault.  */
  36             cpu_restore_state(cs, retaddr);
  37         }
  38         /* Raise Exception.  */
  39         cpu_loop_exit(cs);
  40     }
  41 }
  42 #endif