1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/*
* QEMU Xtensa CPU
*
* Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
* Copyright (c) 2012 SUSE LINUX Products GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Open Source and Linux Lab nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "cpu.h"
#include "qemu-common.h"
#include "migration/vmstate.h"
#include "exec/exec-all.h"
static void xtensa_cpu_set_pc(CPUState *cs, vaddr value)
{
XtensaCPU *cpu = XTENSA_CPU(cs);
cpu->env.pc = value;
}
static bool xtensa_cpu_has_work(CPUState *cs)
{
XtensaCPU *cpu = XTENSA_CPU(cs);
return !cpu->env.runstall && cpu->env.pending_irq_level;
}
/* CPUClass::reset() */
static void xtensa_cpu_reset(CPUState *s)
{
XtensaCPU *cpu = XTENSA_CPU(s);
XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(cpu);
CPUXtensaState *env = &cpu->env;
xcc->parent_reset(s);
env->exception_taken = 0;
env->pc = env->config->exception_vector[EXC_RESET0 + env->static_vectors];
env->sregs[LITBASE] &= ~1;
env->sregs[PS] = xtensa_option_enabled(env->config,
XTENSA_OPTION_INTERRUPT) ? 0x1f : 0x10;
env->sregs[VECBASE] = env->config->vecbase;
env->sregs[IBREAKENABLE] = 0;
env->sregs[MEMCTL] = MEMCTL_IL0EN & env->config->memctl_mask;
env->sregs[CACHEATTR] = 0x22222222;
env->sregs[ATOMCTL] = xtensa_option_enabled(env->config,
XTENSA_OPTION_ATOMCTL) ? 0x28 : 0x15;
env->sregs[CONFIGID0] = env->config->configid[0];
env->sregs[CONFIGID1] = env->config->configid[1];
env->pending_irq_level = 0;
reset_mmu(env);
s->halted = env->runstall;
}
static ObjectClass *xtensa_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
char *typename;
typename = g_strdup_printf("%s-" TYPE_XTENSA_CPU, cpu_model);
oc = object_class_by_name(typename);
g_free(typename);
if (oc == NULL || !object_class_dynamic_cast(oc, TYPE_XTENSA_CPU) ||
object_class_is_abstract(oc)) {
return NULL;
}
return oc;
}
static void xtensa_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
XtensaCPU *cpu = XTENSA_CPU(dev);
XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(dev);
Error *local_err = NULL;
xtensa_irq_init(&cpu->env);
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
cs->gdb_num_regs = xcc->config->gdb_regmap.num_regs;
qemu_init_vcpu(cs);
xcc->parent_realize(dev, errp);
}
static void xtensa_cpu_initfn(Object *obj)
{
CPUState *cs = CPU(obj);
XtensaCPU *cpu = XTENSA_CPU(obj);
XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(obj);
CPUXtensaState *env = &cpu->env;
static bool tcg_inited;
cs->env_ptr = env;
env->config = xcc->config;
env->address_space_er = g_malloc(sizeof(*env->address_space_er));
env->system_er = g_malloc(sizeof(*env->system_er));
memory_region_init_io(env->system_er, NULL, NULL, env, "er",
UINT64_C(0x100000000));
address_space_init(env->address_space_er, env->system_er, "ER");
if (tcg_enabled() && !tcg_inited) {
tcg_inited = true;
xtensa_translate_init();
}
}
static const VMStateDescription vmstate_xtensa_cpu = {
.name = "cpu",
.unmigratable = 1,
};
static void xtensa_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
XtensaCPUClass *xcc = XTENSA_CPU_CLASS(cc);
xcc->parent_realize = dc->realize;
dc->realize = xtensa_cpu_realizefn;
xcc->parent_reset = cc->reset;
cc->reset = xtensa_cpu_reset;
cc->class_by_name = xtensa_cpu_class_by_name;
cc->has_work = xtensa_cpu_has_work;
cc->do_interrupt = xtensa_cpu_do_interrupt;
cc->cpu_exec_interrupt = xtensa_cpu_exec_interrupt;
cc->dump_state = xtensa_cpu_dump_state;
cc->set_pc = xtensa_cpu_set_pc;
cc->gdb_read_register = xtensa_cpu_gdb_read_register;
cc->gdb_write_register = xtensa_cpu_gdb_write_register;
cc->gdb_stop_before_watchpoint = true;
#ifndef CONFIG_USER_ONLY
cc->do_unaligned_access = xtensa_cpu_do_unaligned_access;
cc->get_phys_page_debug = xtensa_cpu_get_phys_page_debug;
cc->do_unassigned_access = xtensa_cpu_do_unassigned_access;
#endif
cc->debug_excp_handler = xtensa_breakpoint_handler;
dc->vmsd = &vmstate_xtensa_cpu;
}
static const TypeInfo xtensa_cpu_type_info = {
.name = TYPE_XTENSA_CPU,
.parent = TYPE_CPU,
.instance_size = sizeof(XtensaCPU),
.instance_init = xtensa_cpu_initfn,
.abstract = true,
.class_size = sizeof(XtensaCPUClass),
.class_init = xtensa_cpu_class_init,
};
static void xtensa_cpu_register_types(void)
{
type_register_static(&xtensa_cpu_type_info);
}
type_init(xtensa_cpu_register_types)
|
