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 #include "tcg/debug-assert.h" 28 #include "hw/qdev-properties.h" 29 30 static void avr_cpu_set_pc(CPUState *cs, vaddr value) 31 { 32 AVRCPU *cpu = AVR_CPU(cs); 33 34 cpu->env.pc_w = value / 2; /* internally PC points to words */ 35 } 36 37 static vaddr avr_cpu_get_pc(CPUState *cs) 38 { 39 AVRCPU *cpu = AVR_CPU(cs); 40 41 return cpu->env.pc_w * 2; 42 } 43 44 static bool avr_cpu_has_work(CPUState *cs) 45 { 46 return (cs->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_RESET)) 47 && cpu_interrupts_enabled(cpu_env(cs)); 48 } 49 50 static int avr_cpu_mmu_index(CPUState *cs, bool ifetch) 51 { 52 return ifetch ? MMU_CODE_IDX : MMU_DATA_IDX; 53 } 54 55 static void avr_cpu_synchronize_from_tb(CPUState *cs, 56 const TranslationBlock *tb) 57 { 58 tcg_debug_assert(!(cs->tcg_cflags & CF_PCREL)); 59 cpu_env(cs)->pc_w = tb->pc / 2; /* internally PC points to words */ 60 } 61 62 static void avr_restore_state_to_opc(CPUState *cs, 63 const TranslationBlock *tb, 64 const uint64_t *data) 65 { 66 cpu_env(cs)->pc_w = data[0]; 67 } 68 69 static void avr_cpu_reset_hold(Object *obj) 70 { 71 CPUState *cs = CPU(obj); 72 AVRCPU *cpu = AVR_CPU(cs); 73 AVRCPUClass *mcc = AVR_CPU_GET_CLASS(obj); 74 CPUAVRState *env = &cpu->env; 75 76 if (mcc->parent_phases.hold) { 77 mcc->parent_phases.hold(obj); 78 } 79 80 env->pc_w = 0; 81 env->sregI = 1; 82 env->sregC = 0; 83 env->sregZ = 0; 84 env->sregN = 0; 85 env->sregV = 0; 86 env->sregS = 0; 87 env->sregH = 0; 88 env->sregT = 0; 89 90 env->rampD = 0; 91 env->rampX = 0; 92 env->rampY = 0; 93 env->rampZ = 0; 94 env->eind = 0; 95 env->sp = cpu->init_sp; 96 97 env->skip = 0; 98 99 memset(env->r, 0, sizeof(env->r)); 100 } 101 102 static void avr_cpu_disas_set_info(CPUState *cpu, disassemble_info *info) 103 { 104 info->mach = bfd_arch_avr; 105 info->print_insn = avr_print_insn; 106 } 107 108 static void avr_cpu_realizefn(DeviceState *dev, Error **errp) 109 { 110 CPUState *cs = CPU(dev); 111 AVRCPUClass *mcc = AVR_CPU_GET_CLASS(dev); 112 Error *local_err = NULL; 113 114 cpu_exec_realizefn(cs, &local_err); 115 if (local_err != NULL) { 116 error_propagate(errp, local_err); 117 return; 118 } 119 qemu_init_vcpu(cs); 120 cpu_reset(cs); 121 122 mcc->parent_realize(dev, errp); 123 } 124 125 static void avr_cpu_set_int(void *opaque, int irq, int level) 126 { 127 AVRCPU *cpu = opaque; 128 CPUAVRState *env = &cpu->env; 129 CPUState *cs = CPU(cpu); 130 uint64_t mask = (1ull << irq); 131 132 if (level) { 133 env->intsrc |= mask; 134 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 135 } else { 136 env->intsrc &= ~mask; 137 if (env->intsrc == 0) { 138 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 139 } 140 } 141 } 142 143 static void avr_cpu_initfn(Object *obj) 144 { 145 AVRCPU *cpu = AVR_CPU(obj); 146 147 /* Set the number of interrupts supported by the CPU. */ 148 qdev_init_gpio_in(DEVICE(cpu), avr_cpu_set_int, 149 sizeof(cpu->env.intsrc) * 8); 150 } 151 152 static Property avr_cpu_properties[] = { 153 DEFINE_PROP_UINT32("init-sp", AVRCPU, init_sp, 0), 154 DEFINE_PROP_END_OF_LIST() 155 }; 156 157 static ObjectClass *avr_cpu_class_by_name(const char *cpu_model) 158 { 159 return object_class_by_name(cpu_model); 160 } 161 162 static void avr_cpu_dump_state(CPUState *cs, FILE *f, int flags) 163 { 164 CPUAVRState *env = cpu_env(cs); 165 int i; 166 167 qemu_fprintf(f, "\n"); 168 qemu_fprintf(f, "PC: %06x\n", env->pc_w * 2); /* PC points to words */ 169 qemu_fprintf(f, "SP: %04x\n", env->sp); 170 qemu_fprintf(f, "rampD: %02x\n", env->rampD >> 16); 171 qemu_fprintf(f, "rampX: %02x\n", env->rampX >> 16); 172 qemu_fprintf(f, "rampY: %02x\n", env->rampY >> 16); 173 qemu_fprintf(f, "rampZ: %02x\n", env->rampZ >> 16); 174 qemu_fprintf(f, "EIND: %02x\n", env->eind >> 16); 175 qemu_fprintf(f, "X: %02x%02x\n", env->r[27], env->r[26]); 176 qemu_fprintf(f, "Y: %02x%02x\n", env->r[29], env->r[28]); 177 qemu_fprintf(f, "Z: %02x%02x\n", env->r[31], env->r[30]); 178 qemu_fprintf(f, "SREG: [ %c %c %c %c %c %c %c %c ]\n", 179 env->sregI ? 'I' : '-', 180 env->sregT ? 'T' : '-', 181 env->sregH ? 'H' : '-', 182 env->sregS ? 'S' : '-', 183 env->sregV ? 'V' : '-', 184 env->sregN ? '-' : 'N', /* Zf has negative logic */ 185 env->sregZ ? 'Z' : '-', 186 env->sregC ? 'I' : '-'); 187 qemu_fprintf(f, "SKIP: %02x\n", env->skip); 188 189 qemu_fprintf(f, "\n"); 190 for (i = 0; i < ARRAY_SIZE(env->r); i++) { 191 qemu_fprintf(f, "R[%02d]: %02x ", i, env->r[i]); 192 193 if ((i % 8) == 7) { 194 qemu_fprintf(f, "\n"); 195 } 196 } 197 qemu_fprintf(f, "\n"); 198 } 199 200 #include "hw/core/sysemu-cpu-ops.h" 201 202 static const struct SysemuCPUOps avr_sysemu_ops = { 203 .get_phys_page_debug = avr_cpu_get_phys_page_debug, 204 }; 205 206 #include "hw/core/tcg-cpu-ops.h" 207 208 static const TCGCPUOps avr_tcg_ops = { 209 .initialize = avr_cpu_tcg_init, 210 .synchronize_from_tb = avr_cpu_synchronize_from_tb, 211 .restore_state_to_opc = avr_restore_state_to_opc, 212 .cpu_exec_interrupt = avr_cpu_exec_interrupt, 213 .tlb_fill = avr_cpu_tlb_fill, 214 .do_interrupt = avr_cpu_do_interrupt, 215 }; 216 217 static void avr_cpu_class_init(ObjectClass *oc, void *data) 218 { 219 DeviceClass *dc = DEVICE_CLASS(oc); 220 CPUClass *cc = CPU_CLASS(oc); 221 AVRCPUClass *mcc = AVR_CPU_CLASS(oc); 222 ResettableClass *rc = RESETTABLE_CLASS(oc); 223 224 device_class_set_parent_realize(dc, avr_cpu_realizefn, &mcc->parent_realize); 225 226 device_class_set_props(dc, avr_cpu_properties); 227 228 resettable_class_set_parent_phases(rc, NULL, avr_cpu_reset_hold, NULL, 229 &mcc->parent_phases); 230 231 cc->class_by_name = avr_cpu_class_by_name; 232 233 cc->has_work = avr_cpu_has_work; 234 cc->mmu_index = avr_cpu_mmu_index; 235 cc->dump_state = avr_cpu_dump_state; 236 cc->set_pc = avr_cpu_set_pc; 237 cc->get_pc = avr_cpu_get_pc; 238 dc->vmsd = &vms_avr_cpu; 239 cc->sysemu_ops = &avr_sysemu_ops; 240 cc->disas_set_info = avr_cpu_disas_set_info; 241 cc->gdb_read_register = avr_cpu_gdb_read_register; 242 cc->gdb_write_register = avr_cpu_gdb_write_register; 243 cc->gdb_adjust_breakpoint = avr_cpu_gdb_adjust_breakpoint; 244 cc->gdb_core_xml_file = "avr-cpu.xml"; 245 cc->tcg_ops = &avr_tcg_ops; 246 } 247 248 /* 249 * Setting features of AVR core type avr5 250 * -------------------------------------- 251 * 252 * This type of AVR core is present in the following AVR MCUs: 253 * 254 * ata5702m322, ata5782, ata5790, ata5790n, ata5791, ata5795, ata5831, ata6613c, 255 * ata6614q, ata8210, ata8510, atmega16, atmega16a, atmega161, atmega162, 256 * atmega163, atmega164a, atmega164p, atmega164pa, atmega165, atmega165a, 257 * atmega165p, atmega165pa, atmega168, atmega168a, atmega168p, atmega168pa, 258 * atmega168pb, atmega169, atmega169a, atmega169p, atmega169pa, atmega16hvb, 259 * atmega16hvbrevb, atmega16m1, atmega16u4, atmega32a, atmega32, atmega323, 260 * atmega324a, atmega324p, atmega324pa, atmega325, atmega325a, atmega325p, 261 * atmega325pa, atmega3250, atmega3250a, atmega3250p, atmega3250pa, atmega328, 262 * atmega328p, atmega328pb, atmega329, atmega329a, atmega329p, atmega329pa, 263 * atmega3290, atmega3290a, atmega3290p, atmega3290pa, atmega32c1, atmega32m1, 264 * atmega32u4, atmega32u6, atmega406, atmega64, atmega64a, atmega640, atmega644, 265 * atmega644a, atmega644p, atmega644pa, atmega645, atmega645a, atmega645p, 266 * atmega6450, atmega6450a, atmega6450p, atmega649, atmega649a, atmega649p, 267 * atmega6490, atmega16hva, atmega16hva2, atmega32hvb, atmega6490a, atmega6490p, 268 * atmega64c1, atmega64m1, atmega64hve, atmega64hve2, atmega64rfr2, 269 * atmega644rfr2, atmega32hvbrevb, at90can32, at90can64, at90pwm161, at90pwm216, 270 * at90pwm316, at90scr100, at90usb646, at90usb647, at94k, m3000 271 */ 272 static void avr_avr5_initfn(Object *obj) 273 { 274 CPUAVRState *env = cpu_env(CPU(obj)); 275 276 set_avr_feature(env, AVR_FEATURE_LPM); 277 set_avr_feature(env, AVR_FEATURE_IJMP_ICALL); 278 set_avr_feature(env, AVR_FEATURE_ADIW_SBIW); 279 set_avr_feature(env, AVR_FEATURE_SRAM); 280 set_avr_feature(env, AVR_FEATURE_BREAK); 281 282 set_avr_feature(env, AVR_FEATURE_2_BYTE_PC); 283 set_avr_feature(env, AVR_FEATURE_2_BYTE_SP); 284 set_avr_feature(env, AVR_FEATURE_JMP_CALL); 285 set_avr_feature(env, AVR_FEATURE_LPMX); 286 set_avr_feature(env, AVR_FEATURE_MOVW); 287 set_avr_feature(env, AVR_FEATURE_MUL); 288 } 289 290 /* 291 * Setting features of AVR core type avr51 292 * -------------------------------------- 293 * 294 * This type of AVR core is present in the following AVR MCUs: 295 * 296 * atmega128, atmega128a, atmega1280, atmega1281, atmega1284, atmega1284p, 297 * atmega128rfa1, atmega128rfr2, atmega1284rfr2, at90can128, at90usb1286, 298 * at90usb1287 299 */ 300 static void avr_avr51_initfn(Object *obj) 301 { 302 CPUAVRState *env = cpu_env(CPU(obj)); 303 304 set_avr_feature(env, AVR_FEATURE_LPM); 305 set_avr_feature(env, AVR_FEATURE_IJMP_ICALL); 306 set_avr_feature(env, AVR_FEATURE_ADIW_SBIW); 307 set_avr_feature(env, AVR_FEATURE_SRAM); 308 set_avr_feature(env, AVR_FEATURE_BREAK); 309 310 set_avr_feature(env, AVR_FEATURE_2_BYTE_PC); 311 set_avr_feature(env, AVR_FEATURE_2_BYTE_SP); 312 set_avr_feature(env, AVR_FEATURE_RAMPZ); 313 set_avr_feature(env, AVR_FEATURE_ELPMX); 314 set_avr_feature(env, AVR_FEATURE_ELPM); 315 set_avr_feature(env, AVR_FEATURE_JMP_CALL); 316 set_avr_feature(env, AVR_FEATURE_LPMX); 317 set_avr_feature(env, AVR_FEATURE_MOVW); 318 set_avr_feature(env, AVR_FEATURE_MUL); 319 } 320 321 /* 322 * Setting features of AVR core type avr6 323 * -------------------------------------- 324 * 325 * This type of AVR core is present in the following AVR MCUs: 326 * 327 * atmega2560, atmega2561, atmega256rfr2, atmega2564rfr2 328 */ 329 static void avr_avr6_initfn(Object *obj) 330 { 331 CPUAVRState *env = cpu_env(CPU(obj)); 332 333 set_avr_feature(env, AVR_FEATURE_LPM); 334 set_avr_feature(env, AVR_FEATURE_IJMP_ICALL); 335 set_avr_feature(env, AVR_FEATURE_ADIW_SBIW); 336 set_avr_feature(env, AVR_FEATURE_SRAM); 337 set_avr_feature(env, AVR_FEATURE_BREAK); 338 339 set_avr_feature(env, AVR_FEATURE_3_BYTE_PC); 340 set_avr_feature(env, AVR_FEATURE_2_BYTE_SP); 341 set_avr_feature(env, AVR_FEATURE_RAMPZ); 342 set_avr_feature(env, AVR_FEATURE_EIJMP_EICALL); 343 set_avr_feature(env, AVR_FEATURE_ELPMX); 344 set_avr_feature(env, AVR_FEATURE_ELPM); 345 set_avr_feature(env, AVR_FEATURE_JMP_CALL); 346 set_avr_feature(env, AVR_FEATURE_LPMX); 347 set_avr_feature(env, AVR_FEATURE_MOVW); 348 set_avr_feature(env, AVR_FEATURE_MUL); 349 } 350 351 typedef struct AVRCPUInfo { 352 const char *name; 353 void (*initfn)(Object *obj); 354 } AVRCPUInfo; 355 356 357 #define DEFINE_AVR_CPU_TYPE(model, initfn) \ 358 { \ 359 .parent = TYPE_AVR_CPU, \ 360 .instance_init = initfn, \ 361 .name = AVR_CPU_TYPE_NAME(model), \ 362 } 363 364 static const TypeInfo avr_cpu_type_info[] = { 365 { 366 .name = TYPE_AVR_CPU, 367 .parent = TYPE_CPU, 368 .instance_size = sizeof(AVRCPU), 369 .instance_align = __alignof(AVRCPU), 370 .instance_init = avr_cpu_initfn, 371 .class_size = sizeof(AVRCPUClass), 372 .class_init = avr_cpu_class_init, 373 .abstract = true, 374 }, 375 DEFINE_AVR_CPU_TYPE("avr5", avr_avr5_initfn), 376 DEFINE_AVR_CPU_TYPE("avr51", avr_avr51_initfn), 377 DEFINE_AVR_CPU_TYPE("avr6", avr_avr6_initfn), 378 }; 379 380 DEFINE_TYPES(avr_cpu_type_info) 381