aboutsummaryrefslogtreecommitdiff
path: root/target/lm32/cpu.c
blob: a14191236fb1cdcfb52c9ccd170bff8f92382161 (plain)
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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
/*
 * QEMU LatticeMico32 CPU
 *
 * Copyright (c) 2012 SUSE LINUX Products GmbH
 *
 * 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 "cpu.h"
#include "qemu-common.h"


static void lm32_cpu_set_pc(CPUState *cs, vaddr value)
{
    LM32CPU *cpu = LM32_CPU(cs);

    cpu->env.pc = value;
}

static void lm32_cpu_list_entry(gpointer data, gpointer user_data)
{
    ObjectClass *oc = data;
    const char *typename = object_class_get_name(oc);
    char *name;

    name = g_strndup(typename, strlen(typename) - strlen(LM32_CPU_TYPE_SUFFIX));
    qemu_printf("  %s\n", name);
    g_free(name);
}


void lm32_cpu_list(void)
{
    GSList *list;

    list = object_class_get_list_sorted(TYPE_LM32_CPU, false);
    qemu_printf("Available CPUs:\n");
    g_slist_foreach(list, lm32_cpu_list_entry, NULL);
    g_slist_free(list);
}

static void lm32_cpu_init_cfg_reg(LM32CPU *cpu)
{
    CPULM32State *env = &cpu->env;
    uint32_t cfg = 0;

    if (cpu->features & LM32_FEATURE_MULTIPLY) {
        cfg |= CFG_M;
    }

    if (cpu->features & LM32_FEATURE_DIVIDE) {
        cfg |= CFG_D;
    }

    if (cpu->features & LM32_FEATURE_SHIFT) {
        cfg |= CFG_S;
    }

    if (cpu->features & LM32_FEATURE_SIGN_EXTEND) {
        cfg |= CFG_X;
    }

    if (cpu->features & LM32_FEATURE_I_CACHE) {
        cfg |= CFG_IC;
    }

    if (cpu->features & LM32_FEATURE_D_CACHE) {
        cfg |= CFG_DC;
    }

    if (cpu->features & LM32_FEATURE_CYCLE_COUNT) {
        cfg |= CFG_CC;
    }

    cfg |= (cpu->num_interrupts << CFG_INT_SHIFT);
    cfg |= (cpu->num_breakpoints << CFG_BP_SHIFT);
    cfg |= (cpu->num_watchpoints << CFG_WP_SHIFT);
    cfg |= (cpu->revision << CFG_REV_SHIFT);

    env->cfg = cfg;
}

static bool lm32_cpu_has_work(CPUState *cs)
{
    return cs->interrupt_request & CPU_INTERRUPT_HARD;
}

/* CPUClass::reset() */
static void lm32_cpu_reset(CPUState *s)
{
    LM32CPU *cpu = LM32_CPU(s);
    LM32CPUClass *lcc = LM32_CPU_GET_CLASS(cpu);
    CPULM32State *env = &cpu->env;

    lcc->parent_reset(s);

    /* reset cpu state */
    memset(env, 0, offsetof(CPULM32State, end_reset_fields));

    lm32_cpu_init_cfg_reg(cpu);
}

static void lm32_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
{
    info->mach = bfd_mach_lm32;
    info->print_insn = print_insn_lm32;
}

static void lm32_cpu_realizefn(DeviceState *dev, Error **errp)
{
    CPUState *cs = CPU(dev);
    LM32CPUClass *lcc = LM32_CPU_GET_CLASS(dev);
    Error *local_err = NULL;

    cpu_exec_realizefn(cs, &local_err);
    if (local_err != NULL) {
        error_propagate(errp, local_err);
        return;
    }

    cpu_reset(cs);

    qemu_init_vcpu(cs);

    lcc->parent_realize(dev, errp);
}

static void lm32_cpu_initfn(Object *obj)
{
    LM32CPU *cpu = LM32_CPU(obj);
    CPULM32State *env = &cpu->env;

    cpu_set_cpustate_pointers(cpu);

    env->flags = 0;
}

static void lm32_basic_cpu_initfn(Object *obj)
{
    LM32CPU *cpu = LM32_CPU(obj);

    cpu->revision = 3;
    cpu->num_interrupts = 32;
    cpu->num_breakpoints = 4;
    cpu->num_watchpoints = 4;
    cpu->features = LM32_FEATURE_SHIFT
                  | LM32_FEATURE_SIGN_EXTEND
                  | LM32_FEATURE_CYCLE_COUNT;
}

static void lm32_standard_cpu_initfn(Object *obj)
{
    LM32CPU *cpu = LM32_CPU(obj);

    cpu->revision = 3;
    cpu->num_interrupts = 32;
    cpu->num_breakpoints = 4;
    cpu->num_watchpoints = 4;
    cpu->features = LM32_FEATURE_MULTIPLY
                  | LM32_FEATURE_DIVIDE
                  | LM32_FEATURE_SHIFT
                  | LM32_FEATURE_SIGN_EXTEND
                  | LM32_FEATURE_I_CACHE
                  | LM32_FEATURE_CYCLE_COUNT;
}

static void lm32_full_cpu_initfn(Object *obj)
{
    LM32CPU *cpu = LM32_CPU(obj);

    cpu->revision = 3;
    cpu->num_interrupts = 32;
    cpu->num_breakpoints = 4;
    cpu->num_watchpoints = 4;
    cpu->features = LM32_FEATURE_MULTIPLY
                  | LM32_FEATURE_DIVIDE
                  | LM32_FEATURE_SHIFT
                  | LM32_FEATURE_SIGN_EXTEND
                  | LM32_FEATURE_I_CACHE
                  | LM32_FEATURE_D_CACHE
                  | LM32_FEATURE_CYCLE_COUNT;
}

static ObjectClass *lm32_cpu_class_by_name(const char *cpu_model)
{
    ObjectClass *oc;
    char *typename;

    typename = g_strdup_printf(LM32_CPU_TYPE_NAME("%s"), cpu_model);
    oc = object_class_by_name(typename);
    g_free(typename);
    if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_LM32_CPU) ||
                       object_class_is_abstract(oc))) {
        oc = NULL;
    }
    return oc;
}

static void lm32_cpu_class_init(ObjectClass *oc, void *data)
{
    LM32CPUClass *lcc = LM32_CPU_CLASS(oc);
    CPUClass *cc = CPU_CLASS(oc);
    DeviceClass *dc = DEVICE_CLASS(oc);

    device_class_set_parent_realize(dc, lm32_cpu_realizefn,
                                    &lcc->parent_realize);
    lcc->parent_reset = cc->reset;
    cc->reset = lm32_cpu_reset;

    cc->class_by_name = lm32_cpu_class_by_name;
    cc->has_work = lm32_cpu_has_work;
    cc->do_interrupt = lm32_cpu_do_interrupt;
    cc->cpu_exec_interrupt = lm32_cpu_exec_interrupt;
    cc->dump_state = lm32_cpu_dump_state;
    cc->set_pc = lm32_cpu_set_pc;
    cc->gdb_read_register = lm32_cpu_gdb_read_register;
    cc->gdb_write_register = lm32_cpu_gdb_write_register;
    cc->tlb_fill = lm32_cpu_tlb_fill;
#ifndef CONFIG_USER_ONLY
    cc->get_phys_page_debug = lm32_cpu_get_phys_page_debug;
    cc->vmsd = &vmstate_lm32_cpu;
#endif
    cc->gdb_num_core_regs = 32 + 7;
    cc->gdb_stop_before_watchpoint = true;
    cc->debug_excp_handler = lm32_debug_excp_handler;
    cc->disas_set_info = lm32_cpu_disas_set_info;
    cc->tcg_initialize = lm32_translate_init;
}

#define DEFINE_LM32_CPU_TYPE(cpu_model, initfn) \
    { \
        .parent = TYPE_LM32_CPU, \
        .name = LM32_CPU_TYPE_NAME(cpu_model), \
        .instance_init = initfn, \
    }

static const TypeInfo lm32_cpus_type_infos[] = {
    { /* base class should be registered first */
         .name = TYPE_LM32_CPU,
         .parent = TYPE_CPU,
         .instance_size = sizeof(LM32CPU),
         .instance_init = lm32_cpu_initfn,
         .abstract = true,
         .class_size = sizeof(LM32CPUClass),
         .class_init = lm32_cpu_class_init,
    },
    DEFINE_LM32_CPU_TYPE("lm32-basic", lm32_basic_cpu_initfn),
    DEFINE_LM32_CPU_TYPE("lm32-standard", lm32_standard_cpu_initfn),
    DEFINE_LM32_CPU_TYPE("lm32-full", lm32_full_cpu_initfn),
};

DEFINE_TYPES(lm32_cpus_type_infos)