4 * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
5 * Copyright (c) 2012 SUSE LINUX Products GmbH
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * * Neither the name of the Open Source and Linux Lab nor the
16 * names of its contributors may be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include "qemu/osdep.h"
32 #include "qapi/error.h"
34 #include "qemu-common.h"
35 #include "migration/vmstate.h"
36 #include "exec/exec-all.h"
39 static void xtensa_cpu_set_pc(CPUState *cs, vaddr value)
41 XtensaCPU *cpu = XTENSA_CPU(cs);
46 static bool xtensa_cpu_has_work(CPUState *cs)
48 XtensaCPU *cpu = XTENSA_CPU(cs);
50 return !cpu->env.runstall && cpu->env.pending_irq_level;
53 /* CPUClass::reset() */
54 static void xtensa_cpu_reset(CPUState *s)
56 XtensaCPU *cpu = XTENSA_CPU(s);
57 XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(cpu);
58 CPUXtensaState *env = &cpu->env;
62 env->exception_taken = 0;
63 env->pc = env->config->exception_vector[EXC_RESET0 + env->static_vectors];
64 env->sregs[LITBASE] &= ~1;
65 env->sregs[PS] = xtensa_option_enabled(env->config,
66 XTENSA_OPTION_INTERRUPT) ? 0x1f : 0x10;
67 env->sregs[VECBASE] = env->config->vecbase;
68 env->sregs[IBREAKENABLE] = 0;
69 env->sregs[MEMCTL] = MEMCTL_IL0EN & env->config->memctl_mask;
70 env->sregs[CACHEATTR] = 0x22222222;
71 env->sregs[ATOMCTL] = xtensa_option_enabled(env->config,
72 XTENSA_OPTION_ATOMCTL) ? 0x28 : 0x15;
73 env->sregs[CONFIGID0] = env->config->configid[0];
74 env->sregs[CONFIGID1] = env->config->configid[1];
76 env->pending_irq_level = 0;
78 s->halted = env->runstall;
81 static ObjectClass *xtensa_cpu_class_by_name(const char *cpu_model)
86 typename = g_strdup_printf("%s-" TYPE_XTENSA_CPU, cpu_model);
87 oc = object_class_by_name(typename);
89 if (oc == NULL || !object_class_dynamic_cast(oc, TYPE_XTENSA_CPU) ||
90 object_class_is_abstract(oc)) {
96 static void xtensa_cpu_realizefn(DeviceState *dev, Error **errp)
98 CPUState *cs = CPU(dev);
99 XtensaCPU *cpu = XTENSA_CPU(dev);
100 XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(dev);
101 Error *local_err = NULL;
103 xtensa_irq_init(&cpu->env);
105 cpu_exec_realizefn(cs, &local_err);
106 if (local_err != NULL) {
107 error_propagate(errp, local_err);
111 cs->gdb_num_regs = xcc->config->gdb_regmap.num_regs;
115 xcc->parent_realize(dev, errp);
118 static void xtensa_cpu_initfn(Object *obj)
120 CPUState *cs = CPU(obj);
121 XtensaCPU *cpu = XTENSA_CPU(obj);
122 XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(obj);
123 CPUXtensaState *env = &cpu->env;
124 static bool tcg_inited;
127 env->config = xcc->config;
129 env->address_space_er = g_malloc(sizeof(*env->address_space_er));
130 env->system_er = g_malloc(sizeof(*env->system_er));
131 memory_region_init_io(env->system_er, NULL, NULL, env, "er",
132 UINT64_C(0x100000000));
133 address_space_init(env->address_space_er, env->system_er, "ER");
135 if (tcg_enabled() && !tcg_inited) {
137 xtensa_translate_init();
141 static const VMStateDescription vmstate_xtensa_cpu = {
146 static void xtensa_cpu_class_init(ObjectClass *oc, void *data)
148 DeviceClass *dc = DEVICE_CLASS(oc);
149 CPUClass *cc = CPU_CLASS(oc);
150 XtensaCPUClass *xcc = XTENSA_CPU_CLASS(cc);
152 xcc->parent_realize = dc->realize;
153 dc->realize = xtensa_cpu_realizefn;
155 xcc->parent_reset = cc->reset;
156 cc->reset = xtensa_cpu_reset;
158 cc->class_by_name = xtensa_cpu_class_by_name;
159 cc->has_work = xtensa_cpu_has_work;
160 cc->do_interrupt = xtensa_cpu_do_interrupt;
161 cc->cpu_exec_interrupt = xtensa_cpu_exec_interrupt;
162 cc->dump_state = xtensa_cpu_dump_state;
163 cc->set_pc = xtensa_cpu_set_pc;
164 cc->gdb_read_register = xtensa_cpu_gdb_read_register;
165 cc->gdb_write_register = xtensa_cpu_gdb_write_register;
166 cc->gdb_stop_before_watchpoint = true;
167 #ifndef CONFIG_USER_ONLY
168 cc->do_unaligned_access = xtensa_cpu_do_unaligned_access;
169 cc->get_phys_page_debug = xtensa_cpu_get_phys_page_debug;
170 cc->do_unassigned_access = xtensa_cpu_do_unassigned_access;
172 cc->debug_excp_handler = xtensa_breakpoint_handler;
173 dc->vmsd = &vmstate_xtensa_cpu;
176 static const TypeInfo xtensa_cpu_type_info = {
177 .name = TYPE_XTENSA_CPU,
179 .instance_size = sizeof(XtensaCPU),
180 .instance_init = xtensa_cpu_initfn,
182 .class_size = sizeof(XtensaCPUClass),
183 .class_init = xtensa_cpu_class_init,
186 static void xtensa_cpu_register_types(void)
188 type_register_static(&xtensa_cpu_type_info);
191 type_init(xtensa_cpu_register_types)