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[qemu.git] / target-openrisc / cpu.c
1 /*
2  * QEMU OpenRISC CPU
3  *
4  * Copyright (c) 2012 Jia Liu <[email protected]>
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 "qemu-common.h"
22
23 /* CPUClass::reset() */
24 static void openrisc_cpu_reset(CPUState *s)
25 {
26     OpenRISCCPU *cpu = OPENRISC_CPU(s);
27     OpenRISCCPUClass *occ = OPENRISC_CPU_GET_CLASS(cpu);
28
29     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
30         qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
31         log_cpu_state(&cpu->env, 0);
32     }
33
34     occ->parent_reset(s);
35
36     memset(&cpu->env, 0, offsetof(CPUOpenRISCState, breakpoints));
37
38     tlb_flush(&cpu->env, 1);
39     /*tb_flush(&cpu->env);    FIXME: Do we need it?  */
40
41     cpu->env.pc = 0x100;
42     cpu->env.sr = SR_FO | SR_SM;
43     cpu->env.exception_index = -1;
44
45     cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP;
46     cpu->env.cpucfgr = CPUCFGR_OB32S | CPUCFGR_OF32S;
47     cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2)) | (DMMUCFGR_NTS & (6 << 2));
48     cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2)) | (IMMUCFGR_NTS & (6 << 2));
49
50 #ifndef CONFIG_USER_ONLY
51     cpu->env.picmr = 0x00000000;
52     cpu->env.picsr = 0x00000000;
53
54     cpu->env.ttmr = 0x00000000;
55     cpu->env.ttcr = 0x00000000;
56 #endif
57 }
58
59 static inline void set_feature(OpenRISCCPU *cpu, int feature)
60 {
61     cpu->feature |= feature;
62     cpu->env.cpucfgr = cpu->feature;
63 }
64
65 void openrisc_cpu_realize(Object *obj, Error **errp)
66 {
67     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
68
69     qemu_init_vcpu(&cpu->env);
70     cpu_reset(CPU(cpu));
71 }
72
73 static void openrisc_cpu_initfn(Object *obj)
74 {
75     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
76     static int inited;
77
78     cpu_exec_init(&cpu->env);
79
80 #ifndef CONFIG_USER_ONLY
81     cpu_openrisc_mmu_init(cpu);
82 #endif
83
84     if (tcg_enabled() && !inited) {
85         inited = 1;
86         openrisc_translate_init();
87     }
88 }
89
90 /* CPU models */
91 static void or1200_initfn(Object *obj)
92 {
93     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
94
95     set_feature(cpu, OPENRISC_FEATURE_OB32S);
96     set_feature(cpu, OPENRISC_FEATURE_OF32S);
97 }
98
99 static void openrisc_any_initfn(Object *obj)
100 {
101     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
102
103     set_feature(cpu, OPENRISC_FEATURE_OB32S);
104 }
105
106 typedef struct OpenRISCCPUInfo {
107     const char *name;
108     void (*initfn)(Object *obj);
109 } OpenRISCCPUInfo;
110
111 static const OpenRISCCPUInfo openrisc_cpus[] = {
112     { .name = "or1200",      .initfn = or1200_initfn },
113     { .name = "any",         .initfn = openrisc_any_initfn },
114 };
115
116 static void openrisc_cpu_class_init(ObjectClass *oc, void *data)
117 {
118     OpenRISCCPUClass *occ = OPENRISC_CPU_CLASS(oc);
119     CPUClass *cc = CPU_CLASS(occ);
120
121     occ->parent_reset = cc->reset;
122     cc->reset = openrisc_cpu_reset;
123 }
124
125 static void cpu_register(const OpenRISCCPUInfo *info)
126 {
127     TypeInfo type_info = {
128         .name = info->name,
129         .parent = TYPE_OPENRISC_CPU,
130         .instance_size = sizeof(OpenRISCCPU),
131         .instance_init = info->initfn,
132         .class_size = sizeof(OpenRISCCPUClass),
133     };
134
135     type_register_static(&type_info);
136 }
137
138 static const TypeInfo openrisc_cpu_type_info = {
139     .name = TYPE_OPENRISC_CPU,
140     .parent = TYPE_CPU,
141     .instance_size = sizeof(OpenRISCCPU),
142     .instance_init = openrisc_cpu_initfn,
143     .abstract = false,
144     .class_size = sizeof(OpenRISCCPUClass),
145     .class_init = openrisc_cpu_class_init,
146 };
147
148 static void openrisc_cpu_register_types(void)
149 {
150     int i;
151
152     type_register_static(&openrisc_cpu_type_info);
153     for (i = 0; i < ARRAY_SIZE(openrisc_cpus); i++) {
154         cpu_register(&openrisc_cpus[i]);
155     }
156 }
157
158 OpenRISCCPU *cpu_openrisc_init(const char *cpu_model)
159 {
160     OpenRISCCPU *cpu;
161
162     if (!object_class_by_name(cpu_model)) {
163         return NULL;
164     }
165     cpu = OPENRISC_CPU(object_new(cpu_model));
166     cpu->env.cpu_model_str = cpu_model;
167
168     openrisc_cpu_realize(OBJECT(cpu), NULL);
169
170     return cpu;
171 }
172
173 typedef struct OpenRISCCPUList {
174     fprintf_function cpu_fprintf;
175     FILE *file;
176 } OpenRISCCPUList;
177
178 /* Sort alphabetically by type name, except for "any". */
179 static gint openrisc_cpu_list_compare(gconstpointer a, gconstpointer b)
180 {
181     ObjectClass *class_a = (ObjectClass *)a;
182     ObjectClass *class_b = (ObjectClass *)b;
183     const char *name_a, *name_b;
184
185     name_a = object_class_get_name(class_a);
186     name_b = object_class_get_name(class_b);
187     if (strcmp(name_a, "any") == 0) {
188         return 1;
189     } else if (strcmp(name_b, "any") == 0) {
190         return -1;
191     } else {
192         return strcmp(name_a, name_b);
193     }
194 }
195
196 static void openrisc_cpu_list_entry(gpointer data, gpointer user_data)
197 {
198     ObjectClass *oc = data;
199     OpenRISCCPUList *s = user_data;
200
201     (*s->cpu_fprintf)(s->file, "  %s\n",
202                       object_class_get_name(oc));
203 }
204
205 void cpu_openrisc_list(FILE *f, fprintf_function cpu_fprintf)
206 {
207     OpenRISCCPUList s = {
208         .file = f,
209         .cpu_fprintf = cpu_fprintf,
210     };
211     GSList *list;
212
213     list = object_class_get_list(TYPE_OPENRISC_CPU, false);
214     list = g_slist_sort(list, openrisc_cpu_list_compare);
215     (*cpu_fprintf)(f, "Available CPUs:\n");
216     g_slist_foreach(list, openrisc_cpu_list_entry, &s);
217     g_slist_free(list);
218 }
219
220 type_init(openrisc_cpu_register_types)
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