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9f64170d CG |
1 | /* |
2 | * QEMU TILE-Gx CPU | |
3 | * | |
4 | * Copyright (c) 2015 Chen Gang | |
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 2.1 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 | |
18 | * <http://www.gnu.org/licenses/lgpl-2.1.html> | |
19 | */ | |
20 | ||
b98ba684 | 21 | #include "qemu/osdep.h" |
da34e65c | 22 | #include "qapi/error.h" |
9f64170d CG |
23 | #include "cpu.h" |
24 | #include "qemu-common.h" | |
25 | #include "hw/qdev-properties.h" | |
26 | #include "migration/vmstate.h" | |
a0577d2a | 27 | #include "linux-user/syscall_defs.h" |
9f64170d CG |
28 | |
29 | static void tilegx_cpu_dump_state(CPUState *cs, FILE *f, | |
30 | fprintf_function cpu_fprintf, int flags) | |
31 | { | |
32 | static const char * const reg_names[TILEGX_R_COUNT] = { | |
33 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
34 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
35 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
36 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
37 | "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", | |
38 | "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", | |
39 | "r48", "r49", "r50", "r51", "bp", "tp", "sp", "lr" | |
40 | }; | |
41 | ||
42 | TileGXCPU *cpu = TILEGX_CPU(cs); | |
43 | CPUTLGState *env = &cpu->env; | |
44 | int i; | |
45 | ||
46 | for (i = 0; i < TILEGX_R_COUNT; i++) { | |
47 | cpu_fprintf(f, "%-4s" TARGET_FMT_lx "%s", | |
48 | reg_names[i], env->regs[i], | |
49 | (i % 4) == 3 ? "\n" : " "); | |
50 | } | |
51 | cpu_fprintf(f, "PC " TARGET_FMT_lx " CEX " TARGET_FMT_lx "\n\n", | |
52 | env->pc, env->spregs[TILEGX_SPR_CMPEXCH]); | |
53 | } | |
54 | ||
55 | TileGXCPU *cpu_tilegx_init(const char *cpu_model) | |
56 | { | |
57 | TileGXCPU *cpu; | |
58 | ||
59 | cpu = TILEGX_CPU(object_new(TYPE_TILEGX_CPU)); | |
60 | ||
61 | object_property_set_bool(OBJECT(cpu), true, "realized", NULL); | |
62 | ||
63 | return cpu; | |
64 | } | |
65 | ||
66 | static void tilegx_cpu_set_pc(CPUState *cs, vaddr value) | |
67 | { | |
68 | TileGXCPU *cpu = TILEGX_CPU(cs); | |
69 | ||
70 | cpu->env.pc = value; | |
71 | } | |
72 | ||
73 | static bool tilegx_cpu_has_work(CPUState *cs) | |
74 | { | |
75 | return true; | |
76 | } | |
77 | ||
78 | static void tilegx_cpu_reset(CPUState *s) | |
79 | { | |
80 | TileGXCPU *cpu = TILEGX_CPU(s); | |
81 | TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(cpu); | |
82 | CPUTLGState *env = &cpu->env; | |
83 | ||
84 | tcc->parent_reset(s); | |
85 | ||
86 | memset(env, 0, sizeof(CPUTLGState)); | |
87 | tlb_flush(s, 1); | |
88 | } | |
89 | ||
90 | static void tilegx_cpu_realizefn(DeviceState *dev, Error **errp) | |
91 | { | |
92 | CPUState *cs = CPU(dev); | |
93 | TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(dev); | |
94 | ||
95 | cpu_reset(cs); | |
96 | qemu_init_vcpu(cs); | |
97 | ||
98 | tcc->parent_realize(dev, errp); | |
99 | } | |
100 | ||
101 | static void tilegx_cpu_initfn(Object *obj) | |
102 | { | |
103 | CPUState *cs = CPU(obj); | |
104 | TileGXCPU *cpu = TILEGX_CPU(obj); | |
105 | CPUTLGState *env = &cpu->env; | |
106 | static bool tcg_initialized; | |
107 | ||
108 | cs->env_ptr = env; | |
109 | cpu_exec_init(cs, &error_abort); | |
110 | ||
111 | if (tcg_enabled() && !tcg_initialized) { | |
112 | tcg_initialized = true; | |
113 | tilegx_tcg_init(); | |
114 | } | |
115 | } | |
116 | ||
117 | static void tilegx_cpu_do_interrupt(CPUState *cs) | |
118 | { | |
119 | cs->exception_index = -1; | |
120 | } | |
121 | ||
122 | static int tilegx_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw, | |
123 | int mmu_idx) | |
124 | { | |
9b9dc7ac RH |
125 | TileGXCPU *cpu = TILEGX_CPU(cs); |
126 | ||
a0577d2a RH |
127 | /* The sigcode field will be filled in by do_signal in main.c. */ |
128 | cs->exception_index = TILEGX_EXCP_SIGNAL; | |
9b9dc7ac | 129 | cpu->env.excaddr = address; |
a0577d2a RH |
130 | cpu->env.signo = TARGET_SIGSEGV; |
131 | cpu->env.sigcode = 0; | |
132 | ||
9f64170d CG |
133 | return 1; |
134 | } | |
135 | ||
136 | static bool tilegx_cpu_exec_interrupt(CPUState *cs, int interrupt_request) | |
137 | { | |
138 | if (interrupt_request & CPU_INTERRUPT_HARD) { | |
139 | tilegx_cpu_do_interrupt(cs); | |
140 | return true; | |
141 | } | |
142 | return false; | |
143 | } | |
144 | ||
145 | static void tilegx_cpu_class_init(ObjectClass *oc, void *data) | |
146 | { | |
147 | DeviceClass *dc = DEVICE_CLASS(oc); | |
148 | CPUClass *cc = CPU_CLASS(oc); | |
149 | TileGXCPUClass *tcc = TILEGX_CPU_CLASS(oc); | |
150 | ||
151 | tcc->parent_realize = dc->realize; | |
152 | dc->realize = tilegx_cpu_realizefn; | |
153 | ||
154 | tcc->parent_reset = cc->reset; | |
155 | cc->reset = tilegx_cpu_reset; | |
156 | ||
157 | cc->has_work = tilegx_cpu_has_work; | |
158 | cc->do_interrupt = tilegx_cpu_do_interrupt; | |
159 | cc->cpu_exec_interrupt = tilegx_cpu_exec_interrupt; | |
160 | cc->dump_state = tilegx_cpu_dump_state; | |
161 | cc->set_pc = tilegx_cpu_set_pc; | |
162 | cc->handle_mmu_fault = tilegx_cpu_handle_mmu_fault; | |
163 | cc->gdb_num_core_regs = 0; | |
4c315c27 MA |
164 | |
165 | /* | |
166 | * Reason: tilegx_cpu_initfn() calls cpu_exec_init(), which saves | |
167 | * the object in cpus -> dangling pointer after final | |
168 | * object_unref(). | |
169 | */ | |
170 | dc->cannot_destroy_with_object_finalize_yet = true; | |
9f64170d CG |
171 | } |
172 | ||
173 | static const TypeInfo tilegx_cpu_type_info = { | |
174 | .name = TYPE_TILEGX_CPU, | |
175 | .parent = TYPE_CPU, | |
176 | .instance_size = sizeof(TileGXCPU), | |
177 | .instance_init = tilegx_cpu_initfn, | |
178 | .class_size = sizeof(TileGXCPUClass), | |
179 | .class_init = tilegx_cpu_class_init, | |
180 | }; | |
181 | ||
182 | static void tilegx_cpu_register_types(void) | |
183 | { | |
184 | type_register_static(&tilegx_cpu_type_info); | |
185 | } | |
186 | ||
187 | type_init(tilegx_cpu_register_types) |