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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/*
* QEMU AVR CPU
*
* Copyright (c) 2019-2020 Michael Rolnik
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see
* <http://www.gnu.org/licenses/lgpl-2.1.html>
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/qemu-print.h"
#include "exec/exec-all.h"
#include "cpu.h"
#include "disas/dis-asm.h"
static void avr_cpu_set_pc(CPUState *cs, vaddr value)
{
AVRCPU *cpu = AVR_CPU(cs);
cpu->env.pc_w = value / 2; /* internally PC points to words */
}
static bool avr_cpu_has_work(CPUState *cs)
{
AVRCPU *cpu = AVR_CPU(cs);
CPUAVRState *env = &cpu->env;
return (cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_RESET))
&& cpu_interrupts_enabled(env);
}
static void avr_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
{
AVRCPU *cpu = AVR_CPU(cs);
CPUAVRState *env = &cpu->env;
env->pc_w = tb->pc / 2; /* internally PC points to words */
}
static void avr_cpu_reset(DeviceState *ds)
{
CPUState *cs = CPU(ds);
AVRCPU *cpu = AVR_CPU(cs);
AVRCPUClass *mcc = AVR_CPU_GET_CLASS(cpu);
CPUAVRState *env = &cpu->env;
mcc->parent_reset(ds);
env->pc_w = 0;
env->sregI = 1;
env->sregC = 0;
env->sregZ = 0;
env->sregN = 0;
env->sregV = 0;
env->sregS = 0;
env->sregH = 0;
env->sregT = 0;
env->rampD = 0;
env->rampX = 0;
env->rampY = 0;
env->rampZ = 0;
env->eind = 0;
env->sp = 0;
env->skip = 0;
memset(env->r, 0, sizeof(env->r));
tlb_flush(cs);
}
static void avr_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
{
info->mach = bfd_arch_avr;
info->print_insn = NULL;
}
static void avr_cpu_realizefn(DeviceState *dev, Error **errp)
{
CPUState *cs = CPU(dev);
AVRCPUClass *mcc = AVR_CPU_GET_CLASS(dev);
Error *local_err = NULL;
cpu_exec_realizefn(cs, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
return;
}
qemu_init_vcpu(cs);
cpu_reset(cs);
mcc->parent_realize(dev, errp);
}
static void avr_cpu_set_int(void *opaque, int irq, int level)
{
AVRCPU *cpu = opaque;
CPUAVRState *env = &cpu->env;
CPUState *cs = CPU(cpu);
uint64_t mask = (1ull << irq);
if (level) {
env->intsrc |= mask;
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
} else {
env->intsrc &= ~mask;
if (env->intsrc == 0) {
cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
}
}
}
static void avr_cpu_initfn(Object *obj)
{
AVRCPU *cpu = AVR_CPU(obj);
cpu_set_cpustate_pointers(cpu);
/* Set the number of interrupts supported by the CPU. */
qdev_init_gpio_in(DEVICE(cpu), avr_cpu_set_int,
sizeof(cpu->env.intsrc) * 8);
}
static ObjectClass *avr_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
oc = object_class_by_name(cpu_model);
if (object_class_dynamic_cast(oc, TYPE_AVR_CPU) == NULL ||
object_class_is_abstract(oc)) {
oc = NULL;
}
return oc;
}
static void avr_cpu_dump_state(CPUState *cs, FILE *f, int flags)
{
AVRCPU *cpu = AVR_CPU(cs);
CPUAVRState *env = &cpu->env;
int i;
qemu_fprintf(f, "\n");
qemu_fprintf(f, "PC: %06x\n", env->pc_w);
qemu_fprintf(f, "SP: %04x\n", env->sp);
qemu_fprintf(f, "rampD: %02x\n", env->rampD >> 16);
qemu_fprintf(f, "rampX: %02x\n", env->rampX >> 16);
qemu_fprintf(f, "rampY: %02x\n", env->rampY >> 16);
qemu_fprintf(f, "rampZ: %02x\n", env->rampZ >> 16);
qemu_fprintf(f, "EIND: %02x\n", env->eind >> 16);
qemu_fprintf(f, "X: %02x%02x\n", env->r[27], env->r[26]);
qemu_fprintf(f, "Y: %02x%02x\n", env->r[29], env->r[28]);
qemu_fprintf(f, "Z: %02x%02x\n", env->r[31], env->r[30]);
qemu_fprintf(f, "SREG: [ %c %c %c %c %c %c %c %c ]\n",
env->sregI ? 'I' : '-',
env->sregT ? 'T' : '-',
env->sregH ? 'H' : '-',
env->sregS ? 'S' : '-',
env->sregV ? 'V' : '-',
env->sregN ? '-' : 'N', /* Zf has negative logic */
env->sregZ ? 'Z' : '-',
env->sregC ? 'I' : '-');
qemu_fprintf(f, "SKIP: %02x\n", env->skip);
qemu_fprintf(f, "\n");
for (i = 0; i < ARRAY_SIZE(env->r); i++) {
qemu_fprintf(f, "R[%02d]: %02x ", i, env->r[i]);
if ((i % 8) == 7) {
qemu_fprintf(f, "\n");
}
}
qemu_fprintf(f, "\n");
}
static void avr_cpu_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
CPUClass *cc = CPU_CLASS(oc);
AVRCPUClass *mcc = AVR_CPU_CLASS(oc);
mcc->parent_realize = dc->realize;
dc->realize = avr_cpu_realizefn;
device_class_set_parent_reset(dc, avr_cpu_reset, &mcc->parent_reset);
cc->class_by_name = avr_cpu_class_by_name;
cc->has_work = avr_cpu_has_work;
cc->do_interrupt = avr_cpu_do_interrupt;
cc->cpu_exec_interrupt = avr_cpu_exec_interrupt;
cc->dump_state = avr_cpu_dump_state;
cc->set_pc = avr_cpu_set_pc;
cc->disas_set_info = avr_cpu_disas_set_info;
cc->tcg_initialize = avr_cpu_tcg_init;
cc->synchronize_from_tb = avr_cpu_synchronize_from_tb;
}
|
