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1 | /* | |
2 | * Helpers for loads and stores | |
3 | * | |
4 | * Copyright (c) 2007 Jocelyn Mayer | |
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 "cpu.h" | |
21 | #include "helper.h" | |
22 | ||
23 | ||
24 | /* Softmmu support */ | |
25 | #ifndef CONFIG_USER_ONLY | |
26 | ||
27 | uint64_t helper_ldl_phys(uint64_t p) | |
28 | { | |
29 | return (int32_t)ldl_phys(p); | |
30 | } | |
31 | ||
32 | uint64_t helper_ldq_phys(uint64_t p) | |
33 | { | |
34 | return ldq_phys(p); | |
35 | } | |
36 | ||
37 | uint64_t helper_ldl_l_phys(CPUAlphaState *env, uint64_t p) | |
38 | { | |
39 | env->lock_addr = p; | |
40 | return env->lock_value = (int32_t)ldl_phys(p); | |
41 | } | |
42 | ||
43 | uint64_t helper_ldq_l_phys(CPUAlphaState *env, uint64_t p) | |
44 | { | |
45 | env->lock_addr = p; | |
46 | return env->lock_value = ldq_phys(p); | |
47 | } | |
48 | ||
49 | void helper_stl_phys(uint64_t p, uint64_t v) | |
50 | { | |
51 | stl_phys(p, v); | |
52 | } | |
53 | ||
54 | void helper_stq_phys(uint64_t p, uint64_t v) | |
55 | { | |
56 | stq_phys(p, v); | |
57 | } | |
58 | ||
59 | uint64_t helper_stl_c_phys(CPUAlphaState *env, uint64_t p, uint64_t v) | |
60 | { | |
61 | uint64_t ret = 0; | |
62 | ||
63 | if (p == env->lock_addr) { | |
64 | int32_t old = ldl_phys(p); | |
65 | if (old == (int32_t)env->lock_value) { | |
66 | stl_phys(p, v); | |
67 | ret = 1; | |
68 | } | |
69 | } | |
70 | env->lock_addr = -1; | |
71 | ||
72 | return ret; | |
73 | } | |
74 | ||
75 | uint64_t helper_stq_c_phys(CPUAlphaState *env, uint64_t p, uint64_t v) | |
76 | { | |
77 | uint64_t ret = 0; | |
78 | ||
79 | if (p == env->lock_addr) { | |
80 | uint64_t old = ldq_phys(p); | |
81 | if (old == env->lock_value) { | |
82 | stq_phys(p, v); | |
83 | ret = 1; | |
84 | } | |
85 | } | |
86 | env->lock_addr = -1; | |
87 | ||
88 | return ret; | |
89 | } | |
90 | ||
91 | static void do_unaligned_access(CPUAlphaState *env, target_ulong addr, | |
92 | int is_write, int is_user, uintptr_t retaddr) | |
93 | { | |
94 | uint64_t pc; | |
95 | uint32_t insn; | |
96 | ||
97 | do_restore_state(env, retaddr); | |
98 | ||
99 | pc = env->pc; | |
100 | insn = cpu_ldl_code(env, pc); | |
101 | ||
102 | env->trap_arg0 = addr; | |
103 | env->trap_arg1 = insn >> 26; /* opcode */ | |
104 | env->trap_arg2 = (insn >> 21) & 31; /* dest regno */ | |
105 | env->exception_index = EXCP_UNALIGN; | |
106 | env->error_code = 0; | |
107 | cpu_loop_exit(env); | |
108 | } | |
109 | ||
110 | void cpu_unassigned_access(CPUAlphaState *env, target_phys_addr_t addr, | |
111 | int is_write, int is_exec, int unused, int size) | |
112 | { | |
113 | env->trap_arg0 = addr; | |
114 | env->trap_arg1 = is_write; | |
115 | dynamic_excp(env, 0, EXCP_MCHK, 0); | |
116 | } | |
117 | ||
118 | #include "softmmu_exec.h" | |
119 | ||
120 | #define MMUSUFFIX _mmu | |
121 | #define ALIGNED_ONLY | |
122 | ||
123 | #define SHIFT 0 | |
124 | #include "softmmu_template.h" | |
125 | ||
126 | #define SHIFT 1 | |
127 | #include "softmmu_template.h" | |
128 | ||
129 | #define SHIFT 2 | |
130 | #include "softmmu_template.h" | |
131 | ||
132 | #define SHIFT 3 | |
133 | #include "softmmu_template.h" | |
134 | ||
135 | /* try to fill the TLB and return an exception if error. If retaddr is | |
136 | NULL, it means that the function was called in C code (i.e. not | |
137 | from generated code or from helper.c) */ | |
138 | /* XXX: fix it to restore all registers */ | |
139 | void tlb_fill(CPUAlphaState *env, target_ulong addr, int is_write, | |
140 | int mmu_idx, uintptr_t retaddr) | |
141 | { | |
142 | int ret; | |
143 | ||
144 | ret = cpu_alpha_handle_mmu_fault(env, addr, is_write, mmu_idx); | |
145 | if (unlikely(ret != 0)) { | |
146 | do_restore_state(env, retaddr); | |
147 | /* Exception index and error code are already set */ | |
148 | cpu_loop_exit(env); | |
149 | } | |
150 | } | |
151 | #endif /* CONFIG_USER_ONLY */ |