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 sysbus_realize_and_unref(SYS_BUS_DEVICE(irqc_dev), &error_fatal); 159 160 /* 161 * 6 goldfish-pic 162 * 163 * map: 0xff000000 - 0xff006fff = 28 KiB 164 * IRQ: #1 (lower priority) -> #6 (higher priority) 165 * 166 */ 167 io_base = VIRT_GF_PIC_MMIO_BASE; 168 for (i = 0; i < VIRT_GF_PIC_NB; i++) { 169 pic_dev[i] = qdev_new(TYPE_GOLDFISH_PIC); 170 sysbus = SYS_BUS_DEVICE(pic_dev[i]); 171 qdev_prop_set_uint8(pic_dev[i], "index", i); 172 sysbus_realize_and_unref(sysbus, &error_fatal); 173 174 sysbus_mmio_map(sysbus, 0, io_base); 175 sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(irqc_dev, i)); 176 177 io_base += 0x1000; 178 } 179 180 /* goldfish-rtc */ 181 io_base = VIRT_GF_RTC_MMIO_BASE; 182 for (i = 0; i < VIRT_GF_RTC_NB; i++) { 183 dev = qdev_new(TYPE_GOLDFISH_RTC); 184 qdev_prop_set_bit(dev, "big-endian", true); 185 sysbus = SYS_BUS_DEVICE(dev); 186 sysbus_realize_and_unref(sysbus, &error_fatal); 187 sysbus_mmio_map(sysbus, 0, io_base); 188 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_GF_RTC_IRQ_BASE + i)); 189 190 io_base += 0x1000; 191 } 192 193 /* goldfish-tty */ 194 dev = qdev_new(TYPE_GOLDFISH_TTY); 195 sysbus = SYS_BUS_DEVICE(dev); 196 qdev_prop_set_chr(dev, "chardev", serial_hd(0)); 197 sysbus_realize_and_unref(sysbus, &error_fatal); 198 sysbus_mmio_map(sysbus, 0, VIRT_GF_TTY_MMIO_BASE); 199 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_GF_TTY_IRQ_BASE)); 200 201 /* virt controller */ 202 dev = qdev_new(TYPE_VIRT_CTRL); 203 sysbus = SYS_BUS_DEVICE(dev); 204 sysbus_realize_and_unref(sysbus, &error_fatal); 205 sysbus_mmio_map(sysbus, 0, VIRT_CTRL_MMIO_BASE); 206 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_CTRL_IRQ_BASE)); 207 208 /* virtio-mmio */ 209 io_base = VIRT_VIRTIO_MMIO_BASE; 210 for (i = 0; i < 128; i++) { 211 dev = qdev_new(TYPE_VIRTIO_MMIO); 212 qdev_prop_set_bit(dev, "force-legacy", false); 213 sysbus = SYS_BUS_DEVICE(dev); 214 sysbus_realize_and_unref(sysbus, &error_fatal); 215 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_VIRTIO_IRQ_BASE + i)); 216 sysbus_mmio_map(sysbus, 0, io_base); 217 io_base += 0x200; 218 } 219 220 if (kernel_filename) { 221 CPUState *cs = CPU(cpu); 222 uint64_t high; 223 void *param_blob, *param_ptr, *param_rng_seed; 224 225 if (kernel_cmdline) { 226 param_blob = g_malloc(strlen(kernel_cmdline) + 1024); 227 } else { 228 param_blob = g_malloc(1024); 229 } 230 231 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, 232 &elf_entry, NULL, &high, NULL, 1, 233 EM_68K, 0, 0); 234 if (kernel_size < 0) { 235 error_report("could not load kernel '%s'", kernel_filename); 236 exit(1); 237 } 238 reset_info->initial_pc = elf_entry; 239 parameters_base = (high + 1) & ~1; 240 param_ptr = param_blob; 241 242 BOOTINFO1(param_ptr, BI_MACHTYPE, MACH_VIRT); 243 BOOTINFO1(param_ptr, BI_FPUTYPE, FPU_68040); 244 BOOTINFO1(param_ptr, BI_MMUTYPE, MMU_68040); 245 BOOTINFO1(param_ptr, BI_CPUTYPE, CPU_68040); 246 BOOTINFO2(param_ptr, BI_MEMCHUNK, 0, ram_size); 247 248 BOOTINFO1(param_ptr, BI_VIRT_QEMU_VERSION, 249 ((QEMU_VERSION_MAJOR << 24) | (QEMU_VERSION_MINOR << 16) | 250 (QEMU_VERSION_MICRO << 8))); 251 BOOTINFO2(param_ptr, BI_VIRT_GF_PIC_BASE, 252 VIRT_GF_PIC_MMIO_BASE, VIRT_GF_PIC_IRQ_BASE); 253 BOOTINFO2(param_ptr, BI_VIRT_GF_RTC_BASE, 254 VIRT_GF_RTC_MMIO_BASE, VIRT_GF_RTC_IRQ_BASE); 255 BOOTINFO2(param_ptr, BI_VIRT_GF_TTY_BASE, 256 VIRT_GF_TTY_MMIO_BASE, VIRT_GF_TTY_IRQ_BASE); 257 BOOTINFO2(param_ptr, BI_VIRT_CTRL_BASE, 258 VIRT_CTRL_MMIO_BASE, VIRT_CTRL_IRQ_BASE); 259 BOOTINFO2(param_ptr, BI_VIRT_VIRTIO_BASE, 260 VIRT_VIRTIO_MMIO_BASE, VIRT_VIRTIO_IRQ_BASE); 261 262 if (kernel_cmdline) { 263 BOOTINFOSTR(param_ptr, BI_COMMAND_LINE, 264 kernel_cmdline); 265 } 266 267 /* Pass seed to RNG. */ 268 param_rng_seed = param_ptr; 269 qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); 270 BOOTINFODATA(param_ptr, BI_RNG_SEED, 271 rng_seed, sizeof(rng_seed)); 272 273 /* load initrd */ 274 if (initrd_filename) { 275 initrd_size = get_image_size(initrd_filename); 276 if (initrd_size < 0) { 277 error_report("could not load initial ram disk '%s'", 278 initrd_filename); 279 exit(1); 280 } 281 282 initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK; 283 load_image_targphys(initrd_filename, initrd_base, 284 ram_size - initrd_base); 285 BOOTINFO2(param_ptr, BI_RAMDISK, initrd_base, 286 initrd_size); 287 } else { 288 initrd_base = 0; 289 initrd_size = 0; 290 } 291 BOOTINFO0(param_ptr, BI_LAST); 292 rom_add_blob_fixed_as("bootinfo", param_blob, param_ptr - param_blob, 293 parameters_base, cs->as); 294 qemu_register_reset_nosnapshotload(rerandomize_rng_seed, 295 rom_ptr_for_as(cs->as, parameters_base, 296 param_ptr - param_blob) + 297 (param_rng_seed - param_blob)); 298 g_free(param_blob); 299 } 300 } 301 302 static void virt_machine_class_init(ObjectClass *oc, void *data) 303 { 304 MachineClass *mc = MACHINE_CLASS(oc); 305 mc->desc = "QEMU M68K Virtual Machine"; 306 mc->init = virt_init; 307 mc->default_cpu_type = M68K_CPU_TYPE_NAME("m68040"); 308 mc->max_cpus = 1; 309 mc->no_floppy = 1; 310 mc->no_parallel = 1; 311 mc->default_ram_id = "m68k_virt.ram"; 312 } 313 314 static const TypeInfo virt_machine_info = { 315 .name = MACHINE_TYPE_NAME("virt"), 316 .parent = TYPE_MACHINE, 317 .abstract = true, 318 .class_init = virt_machine_class_init, 319 }; 320 321 static void virt_machine_register_types(void) 322 { 323 type_register_static(&virt_machine_info); 324 } 325 326 type_init(virt_machine_register_types) 327 328 #define DEFINE_VIRT_MACHINE(major, minor, latest) \ 329 static void virt_##major##_##minor##_class_init(ObjectClass *oc, \ 330 void *data) \ 331 { \ 332 MachineClass *mc = MACHINE_CLASS(oc); \ 333 virt_machine_##major##_##minor##_options(mc); \ 334 mc->desc = "QEMU " # major "." # minor " M68K Virtual Machine"; \ 335 if (latest) { \ 336 mc->alias = "virt"; \ 337 } \ 338 } \ 339 static const TypeInfo machvirt_##major##_##minor##_info = { \ 340 .name = MACHINE_TYPE_NAME("virt-" # major "." # minor), \ 341 .parent = MACHINE_TYPE_NAME("virt"), \ 342 .class_init = virt_##major##_##minor##_class_init, \ 343 }; \ 344 static void machvirt_machine_##major##_##minor##_init(void) \ 345 { \ 346 type_register_static(&machvirt_##major##_##minor##_info); \ 347 } \ 348 type_init(machvirt_machine_##major##_##minor##_init); 349 350 static void virt_machine_8_1_options(MachineClass *mc) 351 { 352 } 353 DEFINE_VIRT_MACHINE(8, 1, true) 354 355 static void virt_machine_8_0_options(MachineClass *mc) 356 { 357 virt_machine_8_1_options(mc); 358 compat_props_add(mc->compat_props, hw_compat_8_0, hw_compat_8_0_len); 359 } 360 DEFINE_VIRT_MACHINE(8, 0, false) 361 362 static void virt_machine_7_2_options(MachineClass *mc) 363 { 364 virt_machine_8_0_options(mc); 365 compat_props_add(mc->compat_props, hw_compat_7_2, hw_compat_7_2_len); 366 } 367 DEFINE_VIRT_MACHINE(7, 2, false) 368 369 static void virt_machine_7_1_options(MachineClass *mc) 370 { 371 virt_machine_7_2_options(mc); 372 compat_props_add(mc->compat_props, hw_compat_7_1, hw_compat_7_1_len); 373 } 374 DEFINE_VIRT_MACHINE(7, 1, false) 375 376 static void virt_machine_7_0_options(MachineClass *mc) 377 { 378 virt_machine_7_1_options(mc); 379 compat_props_add(mc->compat_props, hw_compat_7_0, hw_compat_7_0_len); 380 } 381 DEFINE_VIRT_MACHINE(7, 0, false) 382 383 static void virt_machine_6_2_options(MachineClass *mc) 384 { 385 virt_machine_7_0_options(mc); 386 compat_props_add(mc->compat_props, hw_compat_6_2, hw_compat_6_2_len); 387 } 388 DEFINE_VIRT_MACHINE(6, 2, false) 389 390 static void virt_machine_6_1_options(MachineClass *mc) 391 { 392 virt_machine_6_2_options(mc); 393 compat_props_add(mc->compat_props, hw_compat_6_1, hw_compat_6_1_len); 394 } 395 DEFINE_VIRT_MACHINE(6, 1, false) 396 397 static void virt_machine_6_0_options(MachineClass *mc) 398 { 399 virt_machine_6_1_options(mc); 400 compat_props_add(mc->compat_props, hw_compat_6_0, hw_compat_6_0_len); 401 } 402 DEFINE_VIRT_MACHINE(6, 0, false) 403