LXR qemu/target/avr/cpu.c

   1/*
   2 * QEMU AVR CPU
   3 *
   4 * Copyright (c) 2019-2020 Michael Rolnik
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2.1 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see
  18 * <http://www.gnu.org/licenses/lgpl-2.1.html>
  19 */
  20
  21#include "qemu/osdep.h"
  22#include "qapi/error.h"
  23#include "qemu/qemu-print.h"
  24#include "exec/exec-all.h"
  25#include "cpu.h"
  26#include "disas/dis-asm.h"
  27
  28static void avr_cpu_set_pc(CPUState *cs, vaddr value)
  29{
  30    AVRCPU *cpu = AVR_CPU(cs);
  31
  32    cpu->env.pc_w = value / 2; /* internally PC points to words */
  33}
  34
  35static bool avr_cpu_has_work(CPUState *cs)
  36{
  37    AVRCPU *cpu = AVR_CPU(cs);
  38    CPUAVRState *env = &cpu->env;
  39
  40    return (cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_RESET))
  41            && cpu_interrupts_enabled(env);
  42}
  43
  44static void avr_cpu_synchronize_from_tb(CPUState *cs,
  45                                        const TranslationBlock *tb)
  46{
  47    AVRCPU *cpu = AVR_CPU(cs);
  48    CPUAVRState *env = &cpu->env;
  49
  50    env->pc_w = tb->pc / 2; /* internally PC points to words */
  51}
  52
  53static void avr_cpu_reset(DeviceState *ds)
  54{
  55    CPUState *cs = CPU(ds);
  56    AVRCPU *cpu = AVR_CPU(cs);
  57    AVRCPUClass *mcc = AVR_CPU_GET_CLASS(cpu);
  58    CPUAVRState *env = &cpu->env;
  59
  60    mcc->parent_reset(ds);
  61
  62    env->pc_w = 0;
  63    env->sregI = 1;
  64    env->sregC = 0;
  65    env->sregZ = 0;
  66    env->sregN = 0;
  67    env->sregV = 0;
  68    env->sregS = 0;
  69    env->sregH = 0;
  70    env->sregT = 0;
  71
  72    env->rampD = 0;
  73    env->rampX = 0;
  74    env->rampY = 0;
  75    env->rampZ = 0;
  76    env->eind = 0;
  77    env->sp = 0;
  78
  79    env->skip = 0;
  80
  81    memset(env->r, 0, sizeof(env->r));
  82}
  83
  84static void avr_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
  85{
  86    info->mach = bfd_arch_avr;
  87    info->print_insn = avr_print_insn;
  88}
  89
  90static void avr_cpu_realizefn(DeviceState *dev, Error **errp)
  91{
  92    CPUState *cs = CPU(dev);
  93    AVRCPUClass *mcc = AVR_CPU_GET_CLASS(dev);
  94    Error *local_err = NULL;
  95
  96    cpu_exec_realizefn(cs, &local_err);
  97    if (local_err != NULL) {
  98        error_propagate(errp, local_err);
  99        return;
 100    }
 101    qemu_init_vcpu(cs);
 102    cpu_reset(cs);
 103
 104    mcc->parent_realize(dev, errp);
 105}
 106
 107static void avr_cpu_set_int(void *opaque, int irq, int level)
 108{
 109    AVRCPU *cpu = opaque;
 110    CPUAVRState *env = &cpu->env;
 111    CPUState *cs = CPU(cpu);
 112    uint64_t mask = (1ull << irq);
 113
 114    if (level) {
 115        env->intsrc |= mask;
 116        cpu_interrupt(cs, CPU_INTERRUPT_HARD);
 117    } else {
 118        env->intsrc &= ~mask;
 119        if (env->intsrc == 0) {
 120            cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
 121        }
 122    }
 123}
 124
 125static void avr_cpu_initfn(Object *obj)
 126{
 127    AVRCPU *cpu = AVR_CPU(obj);
 128
 129    cpu_set_cpustate_pointers(cpu);
 130
 131    /* Set the number of interrupts supported by the CPU. */
 132    qdev_init_gpio_in(DEVICE(cpu), avr_cpu_set_int,
 133                      sizeof(cpu->env.intsrc) * 8);
 134}
 135
 136static ObjectClass *avr_cpu_class_by_name(const char *cpu_model)
 137{
 138    ObjectClass *oc;
 139
 140    oc = object_class_by_name(cpu_model);
 141    if (object_class_dynamic_cast(oc, TYPE_AVR_CPU) == NULL ||
 142        object_class_is_abstract(oc)) {
 143        oc = NULL;
 144    }
 145    return oc;
 146}
 147
 148static void avr_cpu_dump_state(CPUState *cs, FILE *f, int flags)
 149{
 150    AVRCPU *cpu = AVR_CPU(cs);
 151    CPUAVRState *env = &cpu->env;
 152    int i;
 153
 154    qemu_fprintf(f, "\n");
 155    qemu_fprintf(f, "PC:    %06x\n", env->pc_w * 2); /* PC points to words */
 156    qemu_fprintf(f, "SP:      %04x\n", env->sp);
 157    qemu_fprintf(f, "rampD:     %02x\n", env->rampD >> 16);
 158    qemu_fprintf(f, "rampX:     %02x\n", env->rampX >> 16);
 159    qemu_fprintf(f, "rampY:     %02x\n", env->rampY >> 16);
 160    qemu_fprintf(f, "rampZ:     %02x\n", env->rampZ >> 16);
 161    qemu_fprintf(f, "EIND:      %02x\n", env->eind >> 16);
 162    qemu_fprintf(f, "X:       %02x%02x\n", env->r[27], env->r[26]);
 163    qemu_fprintf(f, "Y:       %02x%02x\n", env->r[29], env->r[28]);
 164    qemu_fprintf(f, "Z:       %02x%02x\n", env->r[31], env->r[30]);
 165    qemu_fprintf(f, "SREG:    [ %c %c %c %c %c %c %c %c ]\n",
 166                 env->sregI ? 'I' : '-',
 167                 env->sregT ? 'T' : '-',
 168                 env->sregH ? 'H' : '-',
 169                 env->sregS ? 'S' : '-',
 170                 env->sregV ? 'V' : '-',
 171                 env->sregN ? '-' : 'N', /* Zf has negative logic */
 172                 env->sregZ ? 'Z' : '-',
 173                 env->sregC ? 'I' : '-');
 174    qemu_fprintf(f, "SKIP:    %02x\n", env->skip);
 175
 176    qemu_fprintf(f, "\n");
 177    for (i = 0; i < ARRAY_SIZE(env->r); i++) {
 178        qemu_fprintf(f, "R[%02d]:  %02x   ", i, env->r[i]);
 179
 180        if ((i % 8) == 7) {
 181            qemu_fprintf(f, "\n");
 182        }
 183    }
 184    qemu_fprintf(f, "\n");
 185}
 186
 187#include "hw/core/tcg-cpu-ops.h"
 188
 189static struct TCGCPUOps avr_tcg_ops = {
 190    .initialize = avr_cpu_tcg_init,
 191    .synchronize_from_tb = avr_cpu_synchronize_from_tb,
 192    .cpu_exec_interrupt = avr_cpu_exec_interrupt,
 193    .tlb_fill = avr_cpu_tlb_fill,
 194
 195#ifndef CONFIG_USER_ONLY
 196    .do_interrupt = avr_cpu_do_interrupt,
 197#endif /* !CONFIG_USER_ONLY */
 198};
 199
 200static void avr_cpu_class_init(ObjectClass *oc, void *data)
 201{
 202    DeviceClass *dc = DEVICE_CLASS(oc);
 203    CPUClass *cc = CPU_CLASS(oc);
 204    AVRCPUClass *mcc = AVR_CPU_CLASS(oc);
 205
 206    device_class_set_parent_realize(dc, avr_cpu_realizefn, &mcc->parent_realize);
 207    device_class_set_parent_reset(dc, avr_cpu_reset, &mcc->parent_reset);
 208
 209    cc->class_by_name = avr_cpu_class_by_name;
 210
 211    cc->has_work = avr_cpu_has_work;
 212    cc->dump_state = avr_cpu_dump_state;
 213    cc->set_pc = avr_cpu_set_pc;
 214    cc->memory_rw_debug = avr_cpu_memory_rw_debug;
 215    cc->get_phys_page_debug = avr_cpu_get_phys_page_debug;
 216    cc->vmsd = &vms_avr_cpu;
 217    cc->disas_set_info = avr_cpu_disas_set_info;
 218    cc->gdb_read_register = avr_cpu_gdb_read_register;
 219    cc->gdb_write_register = avr_cpu_gdb_write_register;
 220    cc->gdb_num_core_regs = 35;
 221    cc->gdb_core_xml_file = "avr-cpu.xml";
 222    cc->tcg_ops = &avr_tcg_ops;
 223}
 224
 225/*
 226 * Setting features of AVR core type avr5
 227 * --------------------------------------
 228 *
 229 * This type of AVR core is present in the following AVR MCUs:
 230 *
 231 * ata5702m322, ata5782, ata5790, ata5790n, ata5791, ata5795, ata5831, ata6613c,
 232 * ata6614q, ata8210, ata8510, atmega16, atmega16a, atmega161, atmega162,
 233 * atmega163, atmega164a, atmega164p, atmega164pa, atmega165, atmega165a,
 234 * atmega165p, atmega165pa, atmega168, atmega168a, atmega168p, atmega168pa,
 235 * atmega168pb, atmega169, atmega169a, atmega169p, atmega169pa, atmega16hvb,
 236 * atmega16hvbrevb, atmega16m1, atmega16u4, atmega32a, atmega32, atmega323,
 237 * atmega324a, atmega324p, atmega324pa, atmega325, atmega325a, atmega325p,
 238 * atmega325pa, atmega3250, atmega3250a, atmega3250p, atmega3250pa, atmega328,
 239 * atmega328p, atmega328pb, atmega329, atmega329a, atmega329p, atmega329pa,
 240 * atmega3290, atmega3290a, atmega3290p, atmega3290pa, atmega32c1, atmega32m1,
 241 * atmega32u4, atmega32u6, atmega406, atmega64, atmega64a, atmega640, atmega644,
 242 * atmega644a, atmega644p, atmega644pa, atmega645, atmega645a, atmega645p,
 243 * atmega6450, atmega6450a, atmega6450p, atmega649, atmega649a, atmega649p,
 244 * atmega6490, atmega16hva, atmega16hva2, atmega32hvb, atmega6490a, atmega6490p,
 245 * atmega64c1, atmega64m1, atmega64hve, atmega64hve2, atmega64rfr2,
 246 * atmega644rfr2, atmega32hvbrevb, at90can32, at90can64, at90pwm161, at90pwm216,
 247 * at90pwm316, at90scr100, at90usb646, at90usb647, at94k, m3000
 248 */
 249static void avr_avr5_initfn(Object *obj)
 250{
 251    AVRCPU *cpu = AVR_CPU(obj);
 252    CPUAVRState *env = &cpu->env;
 253
 254    set_avr_feature(env, AVR_FEATURE_LPM);
 255    set_avr_feature(env, AVR_FEATURE_IJMP_ICALL);
 256    set_avr_feature(env, AVR_FEATURE_ADIW_SBIW);
 257    set_avr_feature(env, AVR_FEATURE_SRAM);
 258    set_avr_feature(env, AVR_FEATURE_BREAK);
 259
 260    set_avr_feature(env, AVR_FEATURE_2_BYTE_PC);
 261    set_avr_feature(env, AVR_FEATURE_2_BYTE_SP);
 262    set_avr_feature(env, AVR_FEATURE_JMP_CALL);
 263    set_avr_feature(env, AVR_FEATURE_LPMX);
 264    set_avr_feature(env, AVR_FEATURE_MOVW);
 265    set_avr_feature(env, AVR_FEATURE_MUL);
 266}
 267
 268/*
 269 * Setting features of AVR core type avr51
 270 * --------------------------------------
 271 *
 272 * This type of AVR core is present in the following AVR MCUs:
 273 *
 274 * atmega128, atmega128a, atmega1280, atmega1281, atmega1284, atmega1284p,
 275 * atmega128rfa1, atmega128rfr2, atmega1284rfr2, at90can128, at90usb1286,
 276 * at90usb1287
 277 */
 278static void avr_avr51_initfn(Object *obj)
 279{
 280    AVRCPU *cpu = AVR_CPU(obj);
 281    CPUAVRState *env = &cpu->env;
 282
 283    set_avr_feature(env, AVR_FEATURE_LPM);
 284    set_avr_feature(env, AVR_FEATURE_IJMP_ICALL);
 285    set_avr_feature(env, AVR_FEATURE_ADIW_SBIW);
 286    set_avr_feature(env, AVR_FEATURE_SRAM);
 287    set_avr_feature(env, AVR_FEATURE_BREAK);
 288
 289    set_avr_feature(env, AVR_FEATURE_2_BYTE_PC);
 290    set_avr_feature(env, AVR_FEATURE_2_BYTE_SP);
 291    set_avr_feature(env, AVR_FEATURE_RAMPZ);
 292    set_avr_feature(env, AVR_FEATURE_ELPMX);
 293    set_avr_feature(env, AVR_FEATURE_ELPM);
 294    set_avr_feature(env, AVR_FEATURE_JMP_CALL);
 295    set_avr_feature(env, AVR_FEATURE_LPMX);
 296    set_avr_feature(env, AVR_FEATURE_MOVW);
 297    set_avr_feature(env, AVR_FEATURE_MUL);
 298}
 299
 300/*
 301 * Setting features of AVR core type avr6
 302 * --------------------------------------
 303 *
 304 * This type of AVR core is present in the following AVR MCUs:
 305 *
 306 * atmega2560, atmega2561, atmega256rfr2, atmega2564rfr2
 307 */
 308static void avr_avr6_initfn(Object *obj)
 309{
 310    AVRCPU *cpu = AVR_CPU(obj);
 311    CPUAVRState *env = &cpu->env;
 312
 313    set_avr_feature(env, AVR_FEATURE_LPM);
 314    set_avr_feature(env, AVR_FEATURE_IJMP_ICALL);
 315    set_avr_feature(env, AVR_FEATURE_ADIW_SBIW);
 316    set_avr_feature(env, AVR_FEATURE_SRAM);
 317    set_avr_feature(env, AVR_FEATURE_BREAK);
 318
 319    set_avr_feature(env, AVR_FEATURE_3_BYTE_PC);
 320    set_avr_feature(env, AVR_FEATURE_2_BYTE_SP);
 321    set_avr_feature(env, AVR_FEATURE_RAMPZ);
 322    set_avr_feature(env, AVR_FEATURE_EIJMP_EICALL);
 323    set_avr_feature(env, AVR_FEATURE_ELPMX);
 324    set_avr_feature(env, AVR_FEATURE_ELPM);
 325    set_avr_feature(env, AVR_FEATURE_JMP_CALL);
 326    set_avr_feature(env, AVR_FEATURE_LPMX);
 327    set_avr_feature(env, AVR_FEATURE_MOVW);
 328    set_avr_feature(env, AVR_FEATURE_MUL);
 329}
 330
 331typedef struct AVRCPUInfo {
 332    const char *name;
 333    void (*initfn)(Object *obj);
 334} AVRCPUInfo;
 335
 336
 337static void avr_cpu_list_entry(gpointer data, gpointer user_data)
 338{
 339    const char *typename = object_class_get_name(OBJECT_CLASS(data));
 340
 341    qemu_printf("%s\n", typename);
 342}
 343
 344void avr_cpu_list(void)
 345{
 346    GSList *list;
 347    list = object_class_get_list_sorted(TYPE_AVR_CPU, false);
 348    g_slist_foreach(list, avr_cpu_list_entry, NULL);
 349    g_slist_free(list);
 350}
 351
 352#define DEFINE_AVR_CPU_TYPE(model, initfn) \
 353    { \
 354        .parent = TYPE_AVR_CPU, \
 355        .instance_init = initfn, \
 356        .name = AVR_CPU_TYPE_NAME(model), \
 357    }
 358
 359static const TypeInfo avr_cpu_type_info[] = {
 360    {
 361        .name = TYPE_AVR_CPU,
 362        .parent = TYPE_CPU,
 363        .instance_size = sizeof(AVRCPU),
 364        .instance_init = avr_cpu_initfn,
 365        .class_size = sizeof(AVRCPUClass),
 366        .class_init = avr_cpu_class_init,
 367        .abstract = true,
 368    },
 369    DEFINE_AVR_CPU_TYPE("avr5", avr_avr5_initfn),
 370    DEFINE_AVR_CPU_TYPE("avr51", avr_avr51_initfn),
 371    DEFINE_AVR_CPU_TYPE("avr6", avr_avr6_initfn),
 372};
 373
 374DEFINE_TYPES(avr_cpu_type_info)
 375