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target-or32: Add MMU support
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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
23 #ifndef CONFIG_USER_ONLY
24 #include "softmmu_exec.h"
25 #define MMUSUFFIX _mmu
26
27 #define SHIFT 0
28 #include "softmmu_template.h"
29
30 #define SHIFT 1
31 #include "softmmu_template.h"
32
33 #define SHIFT 2
34 #include "softmmu_template.h"
35
36 #define SHIFT 3
37 #include "softmmu_template.h"
38
39 void tlb_fill(CPUOpenRISCState *env, target_ulong addr, int is_write,
40 int mmu_idx, uintptr_t retaddr)
41 {
42 TranslationBlock *tb;
43 unsigned long pc;
44 int ret;
45
46 ret = cpu_openrisc_handle_mmu_fault(env, addr, is_write, mmu_idx);
47
48 if (ret) {
49 if (retaddr) {
50 /* now we have a real cpu fault. */
51 pc = (unsigned long)retaddr;
52 tb = tb_find_pc(pc);
53 if (tb) {
54 /* the PC is inside the translated code. It means that we
55 have a virtual CPU fault. */
56 cpu_restore_state(tb, env, pc);
57 }
58 }
59 /* Raise Exception. */
60 cpu_loop_exit(env);
61 }
62 }
63 #endif