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 */
tlb_fill(target_ulong addr,int is_write,int mmu_idx,void * retaddr)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
74