1 /* 2 * SPDX-License-Identifier: GPL-2.0-or-later 3 * 4 * QEMU Vitual 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 "sysemu/qtest.h" 27 #include "sysemu/runstate.h" 28 #include "sysemu/reset.h" 29 30 #include "hw/intc/m68k_irqc.h" 31 #include "hw/misc/virt_ctrl.h" 32 #include "hw/char/goldfish_tty.h" 33 #include "hw/rtc/goldfish_rtc.h" 34 #include "hw/intc/goldfish_pic.h" 35 #include "hw/virtio/virtio-mmio.h" 36 #include "hw/virtio/virtio-blk.h" 37 38 /* 39 * 6 goldfish-pic for CPU IRQ #1 to IRQ #6 40 * CPU IRQ #1 -> PIC #1 41 * IRQ #1 to IRQ #31 -> unused 42 * IRQ #32 -> goldfish-tty 43 * CPU IRQ #2 -> PIC #2 44 * IRQ #1 to IRQ #32 -> virtio-mmio from 1 to 32 45 * CPU IRQ #3 -> PIC #3 46 * IRQ #1 to IRQ #32 -> virtio-mmio from 33 to 64 47 * CPU IRQ #4 -> PIC #4 48 * IRQ #1 to IRQ #32 -> virtio-mmio from 65 to 96 49 * CPU IRQ #5 -> PIC #5 50 * IRQ #1 to IRQ #32 -> virtio-mmio from 97 to 128 51 * CPU IRQ #6 -> PIC #6 52 * IRQ #1 -> goldfish-rtc 53 * IRQ #2 to IRQ #32 -> unused 54 * CPU IRQ #7 -> NMI 55 */ 56 57 #define PIC_IRQ_BASE(num) (8 + (num - 1) * 32) 58 #define PIC_IRQ(num, irq) (PIC_IRQ_BASE(num) + irq - 1) 59 #define PIC_GPIO(pic_irq) (qdev_get_gpio_in(pic_dev[(pic_irq - 8) / 32], \ 60 (pic_irq - 8) % 32)) 61 62 #define VIRT_GF_PIC_MMIO_BASE 0xff000000 /* MMIO: 0xff000000 - 0xff005fff */ 63 #define VIRT_GF_PIC_IRQ_BASE 1 /* IRQ: #1 -> #6 */ 64 #define VIRT_GF_PIC_NB 6 65 66 /* 2 goldfish-rtc (and timer) */ 67 #define VIRT_GF_RTC_MMIO_BASE 0xff006000 /* MMIO: 0xff006000 - 0xff007fff */ 68 #define VIRT_GF_RTC_IRQ_BASE PIC_IRQ(6, 1) /* PIC: #6, IRQ: #1 */ 69 #define VIRT_GF_RTC_NB 2 70 71 /* 1 goldfish-tty */ 72 #define VIRT_GF_TTY_MMIO_BASE 0xff008000 /* MMIO: 0xff008000 - 0xff008fff */ 73 #define VIRT_GF_TTY_IRQ_BASE PIC_IRQ(1, 32) /* PIC: #1, IRQ: #32 */ 74 75 /* 1 virt-ctrl */ 76 #define VIRT_CTRL_MMIO_BASE 0xff009000 /* MMIO: 0xff009000 - 0xff009fff */ 77 #define VIRT_CTRL_IRQ_BASE PIC_IRQ(1, 1) /* PIC: #1, IRQ: #1 */ 78 79 /* 80 * virtio-mmio size is 0x200 bytes 81 * we use 4 goldfish-pic to attach them, 82 * we can attach 32 virtio devices / goldfish-pic 83 * -> we can manage 32 * 4 = 128 virtio devices 84 */ 85 #define VIRT_VIRTIO_MMIO_BASE 0xff010000 /* MMIO: 0xff010000 - 0xff01ffff */ 86 #define VIRT_VIRTIO_IRQ_BASE PIC_IRQ(2, 1) /* PIC: 2, 3, 4, 5, IRQ: ALL */ 87 88 typedef struct { 89 M68kCPU *cpu; 90 hwaddr initial_pc; 91 hwaddr initial_stack; 92 } ResetInfo; 93 94 static void main_cpu_reset(void *opaque) 95 { 96 ResetInfo *reset_info = opaque; 97 M68kCPU *cpu = reset_info->cpu; 98 CPUState *cs = CPU(cpu); 99 100 cpu_reset(cs); 101 cpu->env.aregs[7] = reset_info->initial_stack; 102 cpu->env.pc = reset_info->initial_pc; 103 } 104 105 static void rerandomize_rng_seed(void *opaque) 106 { 107 struct bi_record *rng_seed = opaque; 108 qemu_guest_getrandom_nofail((void *)rng_seed->data + 2, 109 be16_to_cpu(*(uint16_t *)rng_seed->data)); 110 } 111 112 static void virt_init(MachineState *machine) 113 { 114 M68kCPU *cpu = NULL; 115 int32_t kernel_size; 116 uint64_t elf_entry; 117 ram_addr_t initrd_base; 118 int32_t initrd_size; 119 ram_addr_t ram_size = machine->ram_size; 120 const char *kernel_filename = machine->kernel_filename; 121 const char *initrd_filename = machine->initrd_filename; 122 const char *kernel_cmdline = machine->kernel_cmdline; 123 hwaddr parameters_base; 124 DeviceState *dev; 125 DeviceState *irqc_dev; 126 DeviceState *pic_dev[VIRT_GF_PIC_NB]; 127 SysBusDevice *sysbus; 128 hwaddr io_base; 129 int i; 130 ResetInfo *reset_info; 131 uint8_t rng_seed[32]; 132 133 if (ram_size > 3399672 * KiB) { 134 /* 135 * The physical memory can be up to 4 GiB - 16 MiB, but linux 136 * kernel crashes after this limit (~ 3.2 GiB) 137 */ 138 error_report("Too much memory for this machine: %" PRId64 " KiB, " 139 "maximum 3399672 KiB", ram_size / KiB); 140 exit(1); 141 } 142 143 reset_info = g_new0(ResetInfo, 1); 144 145 /* init CPUs */ 146 cpu = M68K_CPU(cpu_create(machine->cpu_type)); 147 148 reset_info->cpu = cpu; 149 qemu_register_reset(main_cpu_reset, reset_info); 150 151 /* RAM */ 152 memory_region_add_subregion(get_system_memory(), 0, machine->ram); 153 154 /* IRQ Controller */ 155 156 irqc_dev = qdev_new(TYPE_M68K_IRQC); 157 sysbus_realize_and_unref(SYS_BUS_DEVICE(irqc_dev), &error_fatal); 158 159 /* 160 * 6 goldfish-pic 161 * 162 * map: 0xff000000 - 0xff006fff = 28 KiB 163 * IRQ: #1 (lower priority) -> #6 (higher priority) 164 * 165 */ 166 io_base = VIRT_GF_PIC_MMIO_BASE; 167 for (i = 0; i < VIRT_GF_PIC_NB; i++) { 168 pic_dev[i] = qdev_new(TYPE_GOLDFISH_PIC); 169 sysbus = SYS_BUS_DEVICE(pic_dev[i]); 170 qdev_prop_set_uint8(pic_dev[i], "index", i); 171 sysbus_realize_and_unref(sysbus, &error_fatal); 172 173 sysbus_mmio_map(sysbus, 0, io_base); 174 sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(irqc_dev, i)); 175 176 io_base += 0x1000; 177 } 178 179 /* goldfish-rtc */ 180 io_base = VIRT_GF_RTC_MMIO_BASE; 181 for (i = 0; i < VIRT_GF_RTC_NB; i++) { 182 dev = qdev_new(TYPE_GOLDFISH_RTC); 183 qdev_prop_set_bit(dev, "big-endian", true); 184 sysbus = SYS_BUS_DEVICE(dev); 185 sysbus_realize_and_unref(sysbus, &error_fatal); 186 sysbus_mmio_map(sysbus, 0, io_base); 187 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_GF_RTC_IRQ_BASE + i)); 188 189 io_base += 0x1000; 190 } 191 192 /* goldfish-tty */ 193 dev = qdev_new(TYPE_GOLDFISH_TTY); 194 sysbus = SYS_BUS_DEVICE(dev); 195 qdev_prop_set_chr(dev, "chardev", serial_hd(0)); 196 sysbus_realize_and_unref(sysbus, &error_fatal); 197 sysbus_mmio_map(sysbus, 0, VIRT_GF_TTY_MMIO_BASE); 198 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_GF_TTY_IRQ_BASE)); 199 200 /* virt controller */ 201 dev = qdev_new(TYPE_VIRT_CTRL); 202 sysbus = SYS_BUS_DEVICE(dev); 203 sysbus_realize_and_unref(sysbus, &error_fatal); 204 sysbus_mmio_map(sysbus, 0, VIRT_CTRL_MMIO_BASE); 205 sysbus_connect_irq(sysbus, 0, 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_7_2_options(MachineClass *mc) 350 { 351 } 352 DEFINE_VIRT_MACHINE(7, 2, true) 353 354 static void virt_machine_7_1_options(MachineClass *mc) 355 { 356 virt_machine_7_2_options(mc); 357 compat_props_add(mc->compat_props, hw_compat_7_1, hw_compat_7_1_len); 358 } 359 DEFINE_VIRT_MACHINE(7, 1, false) 360 361 static void virt_machine_7_0_options(MachineClass *mc) 362 { 363 virt_machine_7_1_options(mc); 364 compat_props_add(mc->compat_props, hw_compat_7_0, hw_compat_7_0_len); 365 } 366 DEFINE_VIRT_MACHINE(7, 0, false) 367 368 static void virt_machine_6_2_options(MachineClass *mc) 369 { 370 virt_machine_7_0_options(mc); 371 compat_props_add(mc->compat_props, hw_compat_6_2, hw_compat_6_2_len); 372 } 373 DEFINE_VIRT_MACHINE(6, 2, false) 374 375 static void virt_machine_6_1_options(MachineClass *mc) 376 { 377 virt_machine_6_2_options(mc); 378 compat_props_add(mc->compat_props, hw_compat_6_1, hw_compat_6_1_len); 379 } 380 DEFINE_VIRT_MACHINE(6, 1, false) 381 382 static void virt_machine_6_0_options(MachineClass *mc) 383 { 384 virt_machine_6_1_options(mc); 385 compat_props_add(mc->compat_props, hw_compat_6_0, hw_compat_6_0_len); 386 } 387 DEFINE_VIRT_MACHINE(6, 0, false) 388