target-cris/op_helper.c

   1 /*
   2  *  CRIS helper routines
   3  *
   4  *  Copyright (c) 2007 AXIS Communications
   5  *  Written by Edgar E. Iglesias
   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, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <assert.h>
  23 #include "exec.h"
  24 #include "mmu.h"
  25
  26 #define MMUSUFFIX _mmu
  27 #ifdef __s390__
  28 # define GETPC() ((void*)((unsigned long)__builtin_return_address(0) & 0x7fffffffUL))
  29 #else
  30 # define GETPC() (__builtin_return_address(0))
  31 #endif
  32
  33 #define SHIFT 0
  34 #include "softmmu_template.h"
  35
  36 #define SHIFT 1
  37 #include "softmmu_template.h"
  38
  39 #define SHIFT 2
  40 #include "softmmu_template.h"
  41
  42 #define SHIFT 3
  43 #include "softmmu_template.h"
  44
  45 #define D(x)
  46
  47 /* Try to fill the TLB and return an exception if error. If retaddr is
  48    NULL, it means that the function was called in C code (i.e. not
  49    from generated code or from helper.c) */
  50 /* XXX: fix it to restore all registers */
  51 void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
  52 {
  53     TranslationBlock *tb;
  54     CPUState *saved_env;
  55     unsigned long pc;
  56     int ret;
  57
  58     /* XXX: hack to restore env in all cases, even if not called from
  59        generated code */
  60     saved_env = env;
  61     env = cpu_single_env;
  62     ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
  63     if (__builtin_expect(ret, 0)) {
  64         if (retaddr) {
  65             /* now we have a real cpu fault */
  66             pc = (unsigned long)retaddr;
  67             tb = tb_find_pc(pc);
  68             if (tb) {
  69                 /* the PC is inside the translated code. It means that we have
  70                    a virtual CPU fault */
  71                 cpu_restore_state(tb, env, pc, NULL);
  72             }
  73         }
  74         cpu_loop_exit();
  75     }
  76     env = saved_env;
  77 }
  78
  79 void helper_tlb_update(uint32_t T0)
  80 {
  81 #if !defined(CONFIG_USER_ONLY)
  82         uint32_t vaddr;
  83
  84         vaddr = cris_mmu_tlb_latest_update(env, T0);
  85         D(printf("flush vaddr %x\n", vaddr));
  86         tlb_flush_page(env, vaddr);
  87 #endif
  88 }
  89
  90 void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
  91                           int is_asi)
  92 {
  93         D(printf("%s addr=%x w=%d ex=%d asi=%d\n",
  94                 __func__, addr, is_write, is_exec, is_asi));
  95 }