1/*
2 * QEMU Moxie CPU
3 *
4 * Copyright (c) 2013 Anthony Green
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 License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include "qemu/osdep.h"
21#include "qapi/error.h"
22#include "cpu.h"
23#include "migration/vmstate.h"
24#include "machine.h"
25
26static void moxie_cpu_set_pc(CPUState *cs, vaddr value)
27{
28 MoxieCPU *cpu = MOXIE_CPU(cs);
29
30 cpu->env.pc = value;
31}
32
33static bool moxie_cpu_has_work(CPUState *cs)
34{
35 return cs->interrupt_request & CPU_INTERRUPT_HARD;
36}
37
38static void moxie_cpu_reset(CPUState *s)
39{
40 MoxieCPU *cpu = MOXIE_CPU(s);
41 MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(cpu);
42 CPUMoxieState *env = &cpu->env;
43
44 mcc->parent_reset(s);
45
46 memset(env, 0, offsetof(CPUMoxieState, end_reset_fields));
47 env->pc = 0x1000;
48}
49
50static void moxie_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
51{
52 info->mach = bfd_arch_moxie;
53 info->print_insn = print_insn_moxie;
54}
55
56static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)
57{
58 CPUState *cs = CPU(dev);
59 MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(dev);
60 Error *local_err = NULL;
61
62 cpu_exec_realizefn(cs, &local_err);
63 if (local_err != NULL) {
64 error_propagate(errp, local_err);
65 return;
66 }
67
68 qemu_init_vcpu(cs);
69 cpu_reset(cs);
70
71 mcc->parent_realize(dev, errp);
72}
73
74static void moxie_cpu_initfn(Object *obj)
75{
76 MoxieCPU *cpu = MOXIE_CPU(obj);
77
78 cpu_set_cpustate_pointers(cpu);
79}
80
81static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)
82{
83 ObjectClass *oc;
84 char *typename;
85
86 typename = g_strdup_printf(MOXIE_CPU_TYPE_NAME("%s"), cpu_model);
87 oc = object_class_by_name(typename);
88 g_free(typename);
89 if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||
90 object_class_is_abstract(oc))) {
91 return NULL;
92 }
93 return oc;
94}
95
96static void moxie_cpu_class_init(ObjectClass *oc, void *data)
97{
98 DeviceClass *dc = DEVICE_CLASS(oc);
99 CPUClass *cc = CPU_CLASS(oc);
100 MoxieCPUClass *mcc = MOXIE_CPU_CLASS(oc);
101
102 device_class_set_parent_realize(dc, moxie_cpu_realizefn,
103 &mcc->parent_realize);
104 mcc->parent_reset = cc->reset;
105 cc->reset = moxie_cpu_reset;
106
107 cc->class_by_name = moxie_cpu_class_by_name;
108
109 cc->has_work = moxie_cpu_has_work;
110 cc->do_interrupt = moxie_cpu_do_interrupt;
111 cc->dump_state = moxie_cpu_dump_state;
112 cc->set_pc = moxie_cpu_set_pc;
113 cc->tlb_fill = moxie_cpu_tlb_fill;
114#ifndef CONFIG_USER_ONLY
115 cc->get_phys_page_debug = moxie_cpu_get_phys_page_debug;
116 cc->vmsd = &vmstate_moxie_cpu;
117#endif
118 cc->disas_set_info = moxie_cpu_disas_set_info;
119 cc->tcg_initialize = moxie_translate_init;
120}
121
122static void moxielite_initfn(Object *obj)
123{
124 /* Set cpu feature flags */
125}
126
127static void moxie_any_initfn(Object *obj)
128{
129 /* Set cpu feature flags */
130}
131
132#define DEFINE_MOXIE_CPU_TYPE(cpu_model, initfn) \
133 { \
134 .parent = TYPE_MOXIE_CPU, \
135 .instance_init = initfn, \
136 .name = MOXIE_CPU_TYPE_NAME(cpu_model), \
137 }
138
139static const TypeInfo moxie_cpus_type_infos[] = {
140 { /* base class should be registered first */
141 .name = TYPE_MOXIE_CPU,
142 .parent = TYPE_CPU,
143 .instance_size = sizeof(MoxieCPU),
144 .instance_init = moxie_cpu_initfn,
145 .class_size = sizeof(MoxieCPUClass),
146 .class_init = moxie_cpu_class_init,
147 },
148 DEFINE_MOXIE_CPU_TYPE("MoxieLite", moxielite_initfn),
149 DEFINE_MOXIE_CPU_TYPE("any", moxie_any_initfn),
150};
151
152DEFINE_TYPES(moxie_cpus_type_infos)
153