1 /* 2 * SPDX-License-Identifier: GPL-2.0-or-later 3 * 4 * QEMU Virtual M68K Machine 5 * 6 * (c) 2020 Laurent Vivier <laurent@vivier.eu> 7 * 8 */ 9 10 #include "qemu/osdep.h" 11 #include "qemu/units.h" 12 #include "qemu/guest-random.h" 13 #include "sysemu/sysemu.h" 14 #include "cpu.h" 15 #include "hw/boards.h" 16 #include "hw/qdev-properties.h" 17 #include "elf.h" 18 #include "hw/loader.h" 19 #include "ui/console.h" 20 #include "hw/sysbus.h" 21 #include "standard-headers/asm-m68k/bootinfo.h" 22 #include "standard-headers/asm-m68k/bootinfo-virt.h" 23 #include "bootinfo.h" 24 #include "net/net.h" 25 #include "qapi/error.h" 26 #include "qemu/error-report.h" 27 #include "sysemu/qtest.h" 28 #include "sysemu/runstate.h" 29 #include "sysemu/reset.h" 30 31 #include "hw/intc/m68k_irqc.h" 32 #include "hw/misc/virt_ctrl.h" 33 #include "hw/char/goldfish_tty.h" 34 #include "hw/rtc/goldfish_rtc.h" 35 #include "hw/intc/goldfish_pic.h" 36 #include "hw/virtio/virtio-mmio.h" 37 #include "hw/virtio/virtio-blk.h" 38 39 /* 40 * 6 goldfish-pic for CPU IRQ #1 to IRQ #6 41 * CPU IRQ #1 -> PIC #1 42 * IRQ #1 to IRQ #31 -> unused 43 * IRQ #32 -> goldfish-tty 44 * CPU IRQ #2 -> PIC #2 45 * IRQ #1 to IRQ #32 -> virtio-mmio from 1 to 32 46 * CPU IRQ #3 -> PIC #3 47 * IRQ #1 to IRQ #32 -> virtio-mmio from 33 to 64 48 * CPU IRQ #4 -> PIC #4 49 * IRQ #1 to IRQ #32 -> virtio-mmio from 65 to 96 50 * CPU IRQ #5 -> PIC #5 51 * IRQ #1 to IRQ #32 -> virtio-mmio from 97 to 128 52 * CPU IRQ #6 -> PIC #6 53 * IRQ #1 -> goldfish-rtc 54 * IRQ #2 to IRQ #32 -> unused 55 * CPU IRQ #7 -> NMI 56 */ 57 58 #define PIC_IRQ_BASE(num) (8 + (num - 1) * 32) 59 #define PIC_IRQ(num, irq) (PIC_IRQ_BASE(num) + irq - 1) 60 #define PIC_GPIO(pic_irq) (qdev_get_gpio_in(pic_dev[(pic_irq - 8) / 32], \ 61 (pic_irq - 8) % 32)) 62 63 #define VIRT_GF_PIC_MMIO_BASE 0xff000000 /* MMIO: 0xff000000 - 0xff005fff */ 64 #define VIRT_GF_PIC_IRQ_BASE 1 /* IRQ: #1 -> #6 */ 65 #define VIRT_GF_PIC_NB 6 66 67 /* 2 goldfish-rtc (and timer) */ 68 #define VIRT_GF_RTC_MMIO_BASE 0xff006000 /* MMIO: 0xff006000 - 0xff007fff */ 69 #define VIRT_GF_RTC_IRQ_BASE PIC_IRQ(6, 1) /* PIC: #6, IRQ: #1 */ 70 #define VIRT_GF_RTC_NB 2 71 72 /* 1 goldfish-tty */ 73 #define VIRT_GF_TTY_MMIO_BASE 0xff008000 /* MMIO: 0xff008000 - 0xff008fff */ 74 #define VIRT_GF_TTY_IRQ_BASE PIC_IRQ(1, 32) /* PIC: #1, IRQ: #32 */ 75 76 /* 1 virt-ctrl */ 77 #define VIRT_CTRL_MMIO_BASE 0xff009000 /* MMIO: 0xff009000 - 0xff009fff */ 78 #define VIRT_CTRL_IRQ_BASE PIC_IRQ(1, 1) /* PIC: #1, IRQ: #1 */ 79 80 /* 81 * virtio-mmio size is 0x200 bytes 82 * we use 4 goldfish-pic to attach them, 83 * we can attach 32 virtio devices / goldfish-pic 84 * -> we can manage 32 * 4 = 128 virtio devices 85 */ 86 #define VIRT_VIRTIO_MMIO_BASE 0xff010000 /* MMIO: 0xff010000 - 0xff01ffff */ 87 #define VIRT_VIRTIO_IRQ_BASE PIC_IRQ(2, 1) /* PIC: 2, 3, 4, 5, IRQ: ALL */ 88 89 typedef struct { 90 M68kCPU *cpu; 91 hwaddr initial_pc; 92 hwaddr initial_stack; 93 } ResetInfo; 94 95 static void main_cpu_reset(void *opaque) 96 { 97 ResetInfo *reset_info = opaque; 98 M68kCPU *cpu = reset_info->cpu; 99 CPUState *cs = CPU(cpu); 100 101 cpu_reset(cs); 102 cpu->env.aregs[7] = reset_info->initial_stack; 103 cpu->env.pc = reset_info->initial_pc; 104 } 105 106 static void rerandomize_rng_seed(void *opaque) 107 { 108 struct bi_record *rng_seed = opaque; 109 qemu_guest_getrandom_nofail((void *)rng_seed->data + 2, 110 be16_to_cpu(*(uint16_t *)rng_seed->data)); 111 } 112 113 static void virt_init(MachineState *machine) 114 { 115 M68kCPU *cpu = NULL; 116 int32_t kernel_size; 117 uint64_t elf_entry; 118 ram_addr_t initrd_base; 119 int32_t initrd_size; 120 ram_addr_t ram_size = machine->ram_size; 121 const char *kernel_filename = machine->kernel_filename; 122 const char *initrd_filename = machine->initrd_filename; 123 const char *kernel_cmdline = machine->kernel_cmdline; 124 hwaddr parameters_base; 125 DeviceState *dev; 126 DeviceState *irqc_dev; 127 DeviceState *pic_dev[VIRT_GF_PIC_NB]; 128 SysBusDevice *sysbus; 129 hwaddr io_base; 130 int i; 131 ResetInfo *reset_info; 132 uint8_t rng_seed[32]; 133 134 if (ram_size > 3399672 * KiB) { 135 /* 136 * The physical memory can be up to 4 GiB - 16 MiB, but linux 137 * kernel crashes after this limit (~ 3.2 GiB) 138 */ 139 error_report("Too much memory for this machine: %" PRId64 " KiB, " 140 "maximum 3399672 KiB", ram_size / KiB); 141 exit(1); 142 } 143 144 reset_info = g_new0(ResetInfo, 1); 145 146 /* init CPUs */ 147 cpu = M68K_CPU(cpu_create(machine->cpu_type)); 148 149 reset_info->cpu = cpu; 150 qemu_register_reset(main_cpu_reset, reset_info); 151 152 /* RAM */ 153 memory_region_add_subregion(get_system_memory(), 0, machine->ram); 154 155 /* IRQ Controller */ 156 157 irqc_dev = qdev_new(TYPE_M68K_IRQC); 158 object_property_set_link(OBJECT(irqc_dev), "m68k-cpu", 159 OBJECT(cpu), &error_abort); 160 sysbus_realize_and_unref(SYS_BUS_DEVICE(irqc_dev), &error_fatal); 161 162 /* 163 * 6 goldfish-pic 164 * 165 * map: 0xff000000 - 0xff006fff = 28 KiB 166 * IRQ: #1 (lower priority) -> #6 (higher priority) 167 * 168 */ 169 io_base = VIRT_GF_PIC_MMIO_BASE; 170 for (i = 0; i < VIRT_GF_PIC_NB; i++) { 171 pic_dev[i] = qdev_new(TYPE_GOLDFISH_PIC); 172 sysbus = SYS_BUS_DEVICE(pic_dev[i]); 173 qdev_prop_set_uint8(pic_dev[i], "index", i); 174 sysbus_realize_and_unref(sysbus, &error_fatal); 175 176 sysbus_mmio_map(sysbus, 0, io_base); 177 sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(irqc_dev, i)); 178 179 io_base += 0x1000; 180 } 181 182 /* goldfish-rtc */ 183 io_base = VIRT_GF_RTC_MMIO_BASE; 184 for (i = 0; i < VIRT_GF_RTC_NB; i++) { 185 dev = qdev_new(TYPE_GOLDFISH_RTC); 186 qdev_prop_set_bit(dev, "big-endian", true); 187 sysbus = SYS_BUS_DEVICE(dev); 188 sysbus_realize_and_unref(sysbus, &error_fatal); 189 sysbus_mmio_map(sysbus, 0, io_base); 190 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_GF_RTC_IRQ_BASE + i)); 191 192 io_base += 0x1000; 193 } 194 195 /* goldfish-tty */ 196 dev = qdev_new(TYPE_GOLDFISH_TTY); 197 sysbus = SYS_BUS_DEVICE(dev); 198 qdev_prop_set_chr(dev, "chardev", serial_hd(0)); 199 sysbus_realize_and_unref(sysbus, &error_fatal); 200 sysbus_mmio_map(sysbus, 0, VIRT_GF_TTY_MMIO_BASE); 201 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_GF_TTY_IRQ_BASE)); 202 203 /* virt controller */ 204 dev = sysbus_create_simple(TYPE_VIRT_CTRL, VIRT_CTRL_MMIO_BASE, 205 PIC_GPIO(VIRT_CTRL_IRQ_BASE)); 206 207 /* virtio-mmio */ 208 io_base = VIRT_VIRTIO_MMIO_BASE; 209 for (i = 0; i < 128; i++) { 210 dev = qdev_new(TYPE_VIRTIO_MMIO); 211 qdev_prop_set_bit(dev, "force-legacy", false); 212 sysbus = SYS_BUS_DEVICE(dev); 213 sysbus_realize_and_unref(sysbus, &error_fatal); 214 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_VIRTIO_IRQ_BASE + i)); 215 sysbus_mmio_map(sysbus, 0, io_base); 216 io_base += 0x200; 217 } 218 219 if (kernel_filename) { 220 CPUState *cs = CPU(cpu); 221 uint64_t high; 222 void *param_blob, *param_ptr, *param_rng_seed; 223 224 if (kernel_cmdline) { 225 param_blob = g_malloc(strlen(kernel_cmdline) + 1024); 226 } else { 227 param_blob = g_malloc(1024); 228 } 229 230 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, 231 &elf_entry, NULL, &high, NULL, 1, 232 EM_68K, 0, 0); 233 if (kernel_size < 0) { 234 error_report("could not load kernel '%s'", kernel_filename); 235 exit(1); 236 } 237 reset_info->initial_pc = elf_entry; 238 parameters_base = (high + 1) & ~1; 239 param_ptr = param_blob; 240 241 BOOTINFO1(param_ptr, BI_MACHTYPE, MACH_VIRT); 242 BOOTINFO1(param_ptr, BI_FPUTYPE, FPU_68040); 243 BOOTINFO1(param_ptr, BI_MMUTYPE, MMU_68040); 244 BOOTINFO1(param_ptr, BI_CPUTYPE, CPU_68040); 245 BOOTINFO2(param_ptr, BI_MEMCHUNK, 0, ram_size); 246 247 BOOTINFO1(param_ptr, BI_VIRT_QEMU_VERSION, 248 ((QEMU_VERSION_MAJOR << 24) | (QEMU_VERSION_MINOR << 16) | 249 (QEMU_VERSION_MICRO << 8))); 250 BOOTINFO2(param_ptr, BI_VIRT_GF_PIC_BASE, 251 VIRT_GF_PIC_MMIO_BASE, VIRT_GF_PIC_IRQ_BASE); 252 BOOTINFO2(param_ptr, BI_VIRT_GF_RTC_BASE, 253 VIRT_GF_RTC_MMIO_BASE, VIRT_GF_RTC_IRQ_BASE); 254 BOOTINFO2(param_ptr, BI_VIRT_GF_TTY_BASE, 255 VIRT_GF_TTY_MMIO_BASE, VIRT_GF_TTY_IRQ_BASE); 256 BOOTINFO2(param_ptr, BI_VIRT_CTRL_BASE, 257 VIRT_CTRL_MMIO_BASE, VIRT_CTRL_IRQ_BASE); 258 BOOTINFO2(param_ptr, BI_VIRT_VIRTIO_BASE, 259 VIRT_VIRTIO_MMIO_BASE, VIRT_VIRTIO_IRQ_BASE); 260 261 if (kernel_cmdline) { 262 BOOTINFOSTR(param_ptr, BI_COMMAND_LINE, 263 kernel_cmdline); 264 } 265 266 /* Pass seed to RNG. */ 267 param_rng_seed = param_ptr; 268 qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); 269 BOOTINFODATA(param_ptr, BI_RNG_SEED, 270 rng_seed, sizeof(rng_seed)); 271 272 /* load initrd */ 273 if (initrd_filename) { 274 initrd_size = get_image_size(initrd_filename); 275 if (initrd_size < 0) { 276 error_report("could not load initial ram disk '%s'", 277 initrd_filename); 278 exit(1); 279 } 280 281 initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK; 282 load_image_targphys(initrd_filename, initrd_base, 283 ram_size - initrd_base); 284 BOOTINFO2(param_ptr, BI_RAMDISK, initrd_base, 285 initrd_size); 286 } else { 287 initrd_base = 0; 288 initrd_size = 0; 289 } 290 BOOTINFO0(param_ptr, BI_LAST); 291 rom_add_blob_fixed_as("bootinfo", param_blob, param_ptr - param_blob, 292 parameters_base, cs->as); 293 qemu_register_reset_nosnapshotload(rerandomize_rng_seed, 294 rom_ptr_for_as(cs->as, parameters_base, 295 param_ptr - param_blob) + 296 (param_rng_seed - param_blob)); 297 g_free(param_blob); 298 } 299 } 300 301 static void virt_machine_class_init(ObjectClass *oc, void *data) 302 { 303 MachineClass *mc = MACHINE_CLASS(oc); 304 mc->desc = "QEMU M68K Virtual Machine"; 305 mc->init = virt_init; 306 mc->default_cpu_type = M68K_CPU_TYPE_NAME("m68040"); 307 mc->max_cpus = 1; 308 mc->no_floppy = 1; 309 mc->no_parallel = 1; 310 mc->default_ram_id = "m68k_virt.ram"; 311 } 312 313 static const TypeInfo virt_machine_info = { 314 .name = MACHINE_TYPE_NAME("virt"), 315 .parent = TYPE_MACHINE, 316 .abstract = true, 317 .class_init = virt_machine_class_init, 318 }; 319 320 static void virt_machine_register_types(void) 321 { 322 type_register_static(&virt_machine_info); 323 } 324 325 type_init(virt_machine_register_types) 326 327 #define DEFINE_VIRT_MACHINE(major, minor, latest) \ 328 static void virt_##major##_##minor##_class_init(ObjectClass *oc, \ 329 void *data) \ 330 { \ 331 MachineClass *mc = MACHINE_CLASS(oc); \ 332 virt_machine_##major##_##minor##_options(mc); \ 333 mc->desc = "QEMU " # major "." # minor " M68K Virtual Machine"; \ 334 if (latest) { \ 335 mc->alias = "virt"; \ 336 } \ 337 } \ 338 static const TypeInfo machvirt_##major##_##minor##_info = { \ 339 .name = MACHINE_TYPE_NAME("virt-" # major "." # minor), \ 340 .parent = MACHINE_TYPE_NAME("virt"), \ 341 .class_init = virt_##major##_##minor##_class_init, \ 342 }; \ 343 static void machvirt_machine_##major##_##minor##_init(void) \ 344 { \ 345 type_register_static(&machvirt_##major##_##minor##_info); \ 346 } \ 347 type_init(machvirt_machine_##major##_##minor##_init); 348 349 static void virt_machine_9_0_options(MachineClass *mc) 350 { 351 } 352 DEFINE_VIRT_MACHINE(9, 0, true) 353 354 static void virt_machine_8_2_options(MachineClass *mc) 355 { 356 virt_machine_9_0_options(mc); 357 compat_props_add(mc->compat_props, hw_compat_8_2, hw_compat_8_2_len); 358 } 359 DEFINE_VIRT_MACHINE(8, 2, false) 360 361 static void virt_machine_8_1_options(MachineClass *mc) 362 { 363 virt_machine_8_2_options(mc); 364 compat_props_add(mc->compat_props, hw_compat_8_1, hw_compat_8_1_len); 365 } 366 DEFINE_VIRT_MACHINE(8, 1, false) 367 368 static void virt_machine_8_0_options(MachineClass *mc) 369 { 370 virt_machine_8_1_options(mc); 371 compat_props_add(mc->compat_props, hw_compat_8_0, hw_compat_8_0_len); 372 } 373 DEFINE_VIRT_MACHINE(8, 0, false) 374 375 static void virt_machine_7_2_options(MachineClass *mc) 376 { 377 virt_machine_8_0_options(mc); 378 compat_props_add(mc->compat_props, hw_compat_7_2, hw_compat_7_2_len); 379 } 380 DEFINE_VIRT_MACHINE(7, 2, false) 381 382 static void virt_machine_7_1_options(MachineClass *mc) 383 { 384 virt_machine_7_2_options(mc); 385 compat_props_add(mc->compat_props, hw_compat_7_1, hw_compat_7_1_len); 386 } 387 DEFINE_VIRT_MACHINE(7, 1, false) 388 389 static void virt_machine_7_0_options(MachineClass *mc) 390 { 391 virt_machine_7_1_options(mc); 392 compat_props_add(mc->compat_props, hw_compat_7_0, hw_compat_7_0_len); 393 } 394 DEFINE_VIRT_MACHINE(7, 0, false) 395 396 static void virt_machine_6_2_options(MachineClass *mc) 397 { 398 virt_machine_7_0_options(mc); 399 compat_props_add(mc->compat_props, hw_compat_6_2, hw_compat_6_2_len); 400 } 401 DEFINE_VIRT_MACHINE(6, 2, false) 402 403 static void virt_machine_6_1_options(MachineClass *mc) 404 { 405 virt_machine_6_2_options(mc); 406 compat_props_add(mc->compat_props, hw_compat_6_1, hw_compat_6_1_len); 407 } 408 DEFINE_VIRT_MACHINE(6, 1, false) 409 410 static void virt_machine_6_0_options(MachineClass *mc) 411 { 412 virt_machine_6_1_options(mc); 413 compat_props_add(mc->compat_props, hw_compat_6_0, hw_compat_6_0_len); 414 } 415 DEFINE_VIRT_MACHINE(6, 0, false) 416