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