target-s390x/op_helper.c

   1 /*
   2  *  S/390 helper routines
   3  *
   4  *  Copyright (c) 2009 Alexander Graf
   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 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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 USA
  19  */
  20
  21 #include "exec.h"
  22
  23 /*****************************************************************************/
  24 /* Softmmu support */
  25 #if !defined (CONFIG_USER_ONLY)
  26
  27 #define MMUSUFFIX _mmu
  28
  29 #define SHIFT 0
  30 #include "softmmu_template.h"
  31
  32 #define SHIFT 1
  33 #include "softmmu_template.h"
  34
  35 #define SHIFT 2
  36 #include "softmmu_template.h"
  37
  38 #define SHIFT 3
  39 #include "softmmu_template.h"
  40
  41 /* try to fill the TLB and return an exception if error. If retaddr is
  42    NULL, it means that the function was called in C code (i.e. not
  43    from generated code or from helper.c) */
  44 /* XXX: fix it to restore all registers */
  45 void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
  46 {
  47     TranslationBlock *tb;
  48     CPUState *saved_env;
  49     unsigned long pc;
  50     int ret;
  51
  52     /* XXX: hack to restore env in all cases, even if not called from
  53        generated code */
  54     saved_env = env;
  55     env = cpu_single_env;
  56     ret = cpu_s390x_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
  57     if (unlikely(ret != 0)) {
  58         if (likely(retaddr)) {
  59             /* now we have a real cpu fault */
  60             pc = (unsigned long)retaddr;
  61             tb = tb_find_pc(pc);
  62             if (likely(tb)) {
  63                 /* the PC is inside the translated code. It means that we have
  64                    a virtual CPU fault */
  65                 cpu_restore_state(tb, env, pc, NULL);
  66             }
  67         }
  68         /* XXX */
  69         /* helper_raise_exception_err(env->exception_index, env->error_code); */
  70     }
  71     env = saved_env;
  72 }
  73
  74 #endif