target/rx: CPU definitions
[qemu.git] / target / rx / cpu.c
1 /*
2 * QEMU RX CPU
3 *
4 * Copyright (c) 2019 Yoshinori Sato
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2 or later, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #include "qemu/osdep.h"
20 #include "qemu/qemu-print.h"
21 #include "qapi/error.h"
22 #include "cpu.h"
23 #include "qemu-common.h"
24 #include "migration/vmstate.h"
25 #include "exec/exec-all.h"
26 #include "hw/loader.h"
27 #include "fpu/softfloat.h"
28
29 static void rx_cpu_set_pc(CPUState *cs, vaddr value)
30 {
31 RXCPU *cpu = RXCPU(cs);
32
33 cpu->env.pc = value;
34 }
35
36 static void rx_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
37 {
38 RXCPU *cpu = RXCPU(cs);
39
40 cpu->env.pc = tb->pc;
41 }
42
43 static bool rx_cpu_has_work(CPUState *cs)
44 {
45 return cs->interrupt_request &
46 (CPU_INTERRUPT_HARD | CPU_INTERRUPT_FIR);
47 }
48
49 static void rx_cpu_reset(DeviceState *dev)
50 {
51 RXCPU *cpu = RXCPU(dev);
52 RXCPUClass *rcc = RXCPU_GET_CLASS(cpu);
53 CPURXState *env = &cpu->env;
54 uint32_t *resetvec;
55
56 rcc->parent_reset(dev);
57
58 memset(env, 0, offsetof(CPURXState, end_reset_fields));
59
60 resetvec = rom_ptr(0xfffffffc, 4);
61 if (resetvec) {
62 /* In the case of kernel, it is ignored because it is not set. */
63 env->pc = ldl_p(resetvec);
64 }
65 rx_cpu_unpack_psw(env, 0, 1);
66 env->regs[0] = env->isp = env->usp = 0;
67 env->fpsw = 0;
68 set_flush_to_zero(1, &env->fp_status);
69 set_flush_inputs_to_zero(1, &env->fp_status);
70 }
71
72 static void rx_cpu_list_entry(gpointer data, gpointer user_data)
73 {
74 ObjectClass *oc = data;
75
76 qemu_printf(" %s\n", object_class_get_name(oc));
77 }
78
79 void rx_cpu_list(void)
80 {
81 GSList *list;
82 list = object_class_get_list_sorted(TYPE_RX_CPU, false);
83 qemu_printf("Available CPUs:\n");
84 g_slist_foreach(list, rx_cpu_list_entry, NULL);
85 g_slist_free(list);
86 }
87
88 static ObjectClass *rx_cpu_class_by_name(const char *cpu_model)
89 {
90 ObjectClass *oc;
91 char *typename;
92
93 oc = object_class_by_name(cpu_model);
94 if (oc != NULL && object_class_dynamic_cast(oc, TYPE_RX_CPU) != NULL &&
95 !object_class_is_abstract(oc)) {
96 return oc;
97 }
98 typename = g_strdup_printf(RX_CPU_TYPE_NAME("%s"), cpu_model);
99 oc = object_class_by_name(typename);
100 g_free(typename);
101 if (oc != NULL && object_class_is_abstract(oc)) {
102 oc = NULL;
103 }
104
105 return oc;
106 }
107
108 static void rx_cpu_realize(DeviceState *dev, Error **errp)
109 {
110 CPUState *cs = CPU(dev);
111 RXCPUClass *rcc = RXCPU_GET_CLASS(dev);
112 Error *local_err = NULL;
113
114 cpu_exec_realizefn(cs, &local_err);
115 if (local_err != NULL) {
116 error_propagate(errp, local_err);
117 return;
118 }
119
120 qemu_init_vcpu(cs);
121 cpu_reset(cs);
122
123 rcc->parent_realize(dev, errp);
124 }
125
126 static void rx_cpu_set_irq(void *opaque, int no, int request)
127 {
128 RXCPU *cpu = opaque;
129 CPUState *cs = CPU(cpu);
130 int irq = request & 0xff;
131
132 static const int mask[] = {
133 [RX_CPU_IRQ] = CPU_INTERRUPT_HARD,
134 [RX_CPU_FIR] = CPU_INTERRUPT_FIR,
135 };
136 if (irq) {
137 cpu->env.req_irq = irq;
138 cpu->env.req_ipl = (request >> 8) & 0x0f;
139 cpu_interrupt(cs, mask[no]);
140 } else {
141 cpu_reset_interrupt(cs, mask[no]);
142 }
143 }
144
145 static void rx_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
146 {
147 info->mach = bfd_mach_rx;
148 info->print_insn = print_insn_rx;
149 }
150
151 static bool rx_cpu_tlb_fill(CPUState *cs, vaddr addr, int size,
152 MMUAccessType access_type, int mmu_idx,
153 bool probe, uintptr_t retaddr)
154 {
155 uint32_t address, physical, prot;
156
157 /* Linear mapping */
158 address = physical = addr & TARGET_PAGE_MASK;
159 prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
160 tlb_set_page(cs, address, physical, prot, mmu_idx, TARGET_PAGE_SIZE);
161 return true;
162 }
163
164 static void rx_cpu_init(Object *obj)
165 {
166 CPUState *cs = CPU(obj);
167 RXCPU *cpu = RXCPU(obj);
168 CPURXState *env = &cpu->env;
169
170 cpu_set_cpustate_pointers(cpu);
171 cs->env_ptr = env;
172 qdev_init_gpio_in(DEVICE(cpu), rx_cpu_set_irq, 2);
173 }
174
175 static void rx_cpu_class_init(ObjectClass *klass, void *data)
176 {
177 DeviceClass *dc = DEVICE_CLASS(klass);
178 CPUClass *cc = CPU_CLASS(klass);
179 RXCPUClass *rcc = RXCPU_CLASS(klass);
180
181 device_class_set_parent_realize(dc, rx_cpu_realize,
182 &rcc->parent_realize);
183 device_class_set_parent_reset(dc, rx_cpu_reset,
184 &rcc->parent_reset);
185
186 cc->class_by_name = rx_cpu_class_by_name;
187 cc->has_work = rx_cpu_has_work;
188 cc->do_interrupt = rx_cpu_do_interrupt;
189 cc->cpu_exec_interrupt = rx_cpu_exec_interrupt;
190 cc->dump_state = rx_cpu_dump_state;
191 cc->set_pc = rx_cpu_set_pc;
192 cc->synchronize_from_tb = rx_cpu_synchronize_from_tb;
193 cc->gdb_read_register = rx_cpu_gdb_read_register;
194 cc->gdb_write_register = rx_cpu_gdb_write_register;
195 cc->get_phys_page_debug = rx_cpu_get_phys_page_debug;
196 cc->disas_set_info = rx_cpu_disas_set_info;
197 cc->tcg_initialize = rx_translate_init;
198 cc->tlb_fill = rx_cpu_tlb_fill;
199
200 cc->gdb_num_core_regs = 26;
201 cc->gdb_core_xml_file = "rx-core.xml";
202 }
203
204 static const TypeInfo rx_cpu_info = {
205 .name = TYPE_RX_CPU,
206 .parent = TYPE_CPU,
207 .instance_size = sizeof(RXCPU),
208 .instance_init = rx_cpu_init,
209 .abstract = true,
210 .class_size = sizeof(RXCPUClass),
211 .class_init = rx_cpu_class_init,
212 };
213
214 static const TypeInfo rx62n_rx_cpu_info = {
215 .name = TYPE_RX62N_CPU,
216 .parent = TYPE_RX_CPU,
217 };
218
219 static void rx_cpu_register_types(void)
220 {
221 type_register_static(&rx_cpu_info);
222 type_register_static(&rx62n_rx_cpu_info);
223 }
224
225 type_init(rx_cpu_register_types)