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 struct bi_record *rng_seed; 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 if (reset_info->rng_seed) { 102 qemu_guest_getrandom_nofail((void *)reset_info->rng_seed->data + 2, 103 be16_to_cpu(*(uint16_t *)reset_info->rng_seed->data)); 104 } 105 106 cpu_reset(cs); 107 cpu->env.aregs[7] = reset_info->initial_stack; 108 cpu->env.pc = reset_info->initial_pc; 109 } 110 111 static void virt_init(MachineState *machine) 112 { 113 M68kCPU *cpu = NULL; 114 int32_t kernel_size; 115 uint64_t elf_entry; 116 ram_addr_t initrd_base; 117 int32_t initrd_size; 118 ram_addr_t ram_size = machine->ram_size; 119 const char *kernel_filename = machine->kernel_filename; 120 const char *initrd_filename = machine->initrd_filename; 121 const char *kernel_cmdline = machine->kernel_cmdline; 122 hwaddr parameters_base; 123 DeviceState *dev; 124 DeviceState *irqc_dev; 125 DeviceState *pic_dev[VIRT_GF_PIC_NB]; 126 SysBusDevice *sysbus; 127 hwaddr io_base; 128 int i; 129 ResetInfo *reset_info; 130 uint8_t rng_seed[32]; 131 132 if (ram_size > 3399672 * KiB) { 133 /* 134 * The physical memory can be up to 4 GiB - 16 MiB, but linux 135 * kernel crashes after this limit (~ 3.2 GiB) 136 */ 137 error_report("Too much memory for this machine: %" PRId64 " KiB, " 138 "maximum 3399672 KiB", ram_size / KiB); 139 exit(1); 140 } 141 142 reset_info = g_new0(ResetInfo, 1); 143 144 /* init CPUs */ 145 cpu = M68K_CPU(cpu_create(machine->cpu_type)); 146 147 reset_info->cpu = cpu; 148 qemu_register_reset(main_cpu_reset, reset_info); 149 150 /* RAM */ 151 memory_region_add_subregion(get_system_memory(), 0, machine->ram); 152 153 /* IRQ Controller */ 154 155 irqc_dev = qdev_new(TYPE_M68K_IRQC); 156 sysbus_realize_and_unref(SYS_BUS_DEVICE(irqc_dev), &error_fatal); 157 158 /* 159 * 6 goldfish-pic 160 * 161 * map: 0xff000000 - 0xff006fff = 28 KiB 162 * IRQ: #1 (lower priority) -> #6 (higher priority) 163 * 164 */ 165 io_base = VIRT_GF_PIC_MMIO_BASE; 166 for (i = 0; i < VIRT_GF_PIC_NB; i++) { 167 pic_dev[i] = qdev_new(TYPE_GOLDFISH_PIC); 168 sysbus = SYS_BUS_DEVICE(pic_dev[i]); 169 qdev_prop_set_uint8(pic_dev[i], "index", i); 170 sysbus_realize_and_unref(sysbus, &error_fatal); 171 172 sysbus_mmio_map(sysbus, 0, io_base); 173 sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(irqc_dev, i)); 174 175 io_base += 0x1000; 176 } 177 178 /* goldfish-rtc */ 179 io_base = VIRT_GF_RTC_MMIO_BASE; 180 for (i = 0; i < VIRT_GF_RTC_NB; i++) { 181 dev = qdev_new(TYPE_GOLDFISH_RTC); 182 qdev_prop_set_bit(dev, "big-endian", true); 183 sysbus = SYS_BUS_DEVICE(dev); 184 sysbus_realize_and_unref(sysbus, &error_fatal); 185 sysbus_mmio_map(sysbus, 0, io_base); 186 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_GF_RTC_IRQ_BASE + i)); 187 188 io_base += 0x1000; 189 } 190 191 /* goldfish-tty */ 192 dev = qdev_new(TYPE_GOLDFISH_TTY); 193 sysbus = SYS_BUS_DEVICE(dev); 194 qdev_prop_set_chr(dev, "chardev", serial_hd(0)); 195 sysbus_realize_and_unref(sysbus, &error_fatal); 196 sysbus_mmio_map(sysbus, 0, VIRT_GF_TTY_MMIO_BASE); 197 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_GF_TTY_IRQ_BASE)); 198 199 /* virt controller */ 200 dev = qdev_new(TYPE_VIRT_CTRL); 201 sysbus = SYS_BUS_DEVICE(dev); 202 sysbus_realize_and_unref(sysbus, &error_fatal); 203 sysbus_mmio_map(sysbus, 0, VIRT_CTRL_MMIO_BASE); 204 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_CTRL_IRQ_BASE)); 205 206 /* virtio-mmio */ 207 io_base = VIRT_VIRTIO_MMIO_BASE; 208 for (i = 0; i < 128; i++) { 209 dev = qdev_new(TYPE_VIRTIO_MMIO); 210 qdev_prop_set_bit(dev, "force-legacy", false); 211 sysbus = SYS_BUS_DEVICE(dev); 212 sysbus_realize_and_unref(sysbus, &error_fatal); 213 sysbus_connect_irq(sysbus, 0, PIC_GPIO(VIRT_VIRTIO_IRQ_BASE + i)); 214 sysbus_mmio_map(sysbus, 0, io_base); 215 io_base += 0x200; 216 } 217 218 if (kernel_filename) { 219 CPUState *cs = CPU(cpu); 220 uint64_t high; 221 void *param_blob, *param_ptr, *param_rng_seed; 222 223 if (kernel_cmdline) { 224 param_blob = g_malloc(strlen(kernel_cmdline) + 1024); 225 } else { 226 param_blob = g_malloc(1024); 227 } 228 229 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, 230 &elf_entry, NULL, &high, NULL, 1, 231 EM_68K, 0, 0); 232 if (kernel_size < 0) { 233 error_report("could not load kernel '%s'", kernel_filename); 234 exit(1); 235 } 236 reset_info->initial_pc = elf_entry; 237 parameters_base = (high + 1) & ~1; 238 param_ptr = param_blob; 239 240 BOOTINFO1(param_ptr, BI_MACHTYPE, MACH_VIRT); 241 BOOTINFO1(param_ptr, BI_FPUTYPE, FPU_68040); 242 BOOTINFO1(param_ptr, BI_MMUTYPE, MMU_68040); 243 BOOTINFO1(param_ptr, BI_CPUTYPE, CPU_68040); 244 BOOTINFO2(param_ptr, BI_MEMCHUNK, 0, ram_size); 245 246 BOOTINFO1(param_ptr, BI_VIRT_QEMU_VERSION, 247 ((QEMU_VERSION_MAJOR << 24) | (QEMU_VERSION_MINOR << 16) | 248 (QEMU_VERSION_MICRO << 8))); 249 BOOTINFO2(param_ptr, BI_VIRT_GF_PIC_BASE, 250 VIRT_GF_PIC_MMIO_BASE, VIRT_GF_PIC_IRQ_BASE); 251 BOOTINFO2(param_ptr, BI_VIRT_GF_RTC_BASE, 252 VIRT_GF_RTC_MMIO_BASE, VIRT_GF_RTC_IRQ_BASE); 253 BOOTINFO2(param_ptr, BI_VIRT_GF_TTY_BASE, 254 VIRT_GF_TTY_MMIO_BASE, VIRT_GF_TTY_IRQ_BASE); 255 BOOTINFO2(param_ptr, BI_VIRT_CTRL_BASE, 256 VIRT_CTRL_MMIO_BASE, VIRT_CTRL_IRQ_BASE); 257 BOOTINFO2(param_ptr, BI_VIRT_VIRTIO_BASE, 258 VIRT_VIRTIO_MMIO_BASE, VIRT_VIRTIO_IRQ_BASE); 259 260 if (kernel_cmdline) { 261 BOOTINFOSTR(param_ptr, BI_COMMAND_LINE, 262 kernel_cmdline); 263 } 264 265 /* Pass seed to RNG. */ 266 param_rng_seed = param_ptr; 267 qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); 268 BOOTINFODATA(param_ptr, BI_RNG_SEED, 269 rng_seed, sizeof(rng_seed)); 270 271 /* load initrd */ 272 if (initrd_filename) { 273 initrd_size = get_image_size(initrd_filename); 274 if (initrd_size < 0) { 275 error_report("could not load initial ram disk '%s'", 276 initrd_filename); 277 exit(1); 278 } 279 280 initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK; 281 load_image_targphys(initrd_filename, initrd_base, 282 ram_size - initrd_base); 283 BOOTINFO2(param_ptr, BI_RAMDISK, initrd_base, 284 initrd_size); 285 } else { 286 initrd_base = 0; 287 initrd_size = 0; 288 } 289 BOOTINFO0(param_ptr, BI_LAST); 290 rom_add_blob_fixed_as("bootinfo", param_blob, param_ptr - param_blob, 291 parameters_base, cs->as); 292 reset_info->rng_seed = rom_ptr_for_as(cs->as, parameters_base, 293 param_ptr - param_blob) + 294 (param_rng_seed - param_blob); 295 g_free(param_blob); 296 } 297 } 298 299 static void virt_machine_class_init(ObjectClass *oc, void *data) 300 { 301 MachineClass *mc = MACHINE_CLASS(oc); 302 mc->desc = "QEMU M68K Virtual Machine"; 303 mc->init = virt_init; 304 mc->default_cpu_type = M68K_CPU_TYPE_NAME("m68040"); 305 mc->max_cpus = 1; 306 mc->no_floppy = 1; 307 mc->no_parallel = 1; 308 mc->default_ram_id = "m68k_virt.ram"; 309 } 310 311 static const TypeInfo virt_machine_info = { 312 .name = MACHINE_TYPE_NAME("virt"), 313 .parent = TYPE_MACHINE, 314 .abstract = true, 315 .class_init = virt_machine_class_init, 316 }; 317 318 static void virt_machine_register_types(void) 319 { 320 type_register_static(&virt_machine_info); 321 } 322 323 type_init(virt_machine_register_types) 324 325 #define DEFINE_VIRT_MACHINE(major, minor, latest) \ 326 static void virt_##major##_##minor##_class_init(ObjectClass *oc, \ 327 void *data) \ 328 { \ 329 MachineClass *mc = MACHINE_CLASS(oc); \ 330 virt_machine_##major##_##minor##_options(mc); \ 331 mc->desc = "QEMU " # major "." # minor " M68K Virtual Machine"; \ 332 if (latest) { \ 333 mc->alias = "virt"; \ 334 } \ 335 } \ 336 static const TypeInfo machvirt_##major##_##minor##_info = { \ 337 .name = MACHINE_TYPE_NAME("virt-" # major "." # minor), \ 338 .parent = MACHINE_TYPE_NAME("virt"), \ 339 .class_init = virt_##major##_##minor##_class_init, \ 340 }; \ 341 static void machvirt_machine_##major##_##minor##_init(void) \ 342 { \ 343 type_register_static(&machvirt_##major##_##minor##_info); \ 344 } \ 345 type_init(machvirt_machine_##major##_##minor##_init); 346 347 static void virt_machine_7_2_options(MachineClass *mc) 348 { 349 } 350 DEFINE_VIRT_MACHINE(7, 2, true) 351 352 static void virt_machine_7_1_options(MachineClass *mc) 353 { 354 virt_machine_7_2_options(mc); 355 compat_props_add(mc->compat_props, hw_compat_7_1, hw_compat_7_1_len); 356 } 357 DEFINE_VIRT_MACHINE(7, 1, false) 358 359 static void virt_machine_7_0_options(MachineClass *mc) 360 { 361 virt_machine_7_1_options(mc); 362 compat_props_add(mc->compat_props, hw_compat_7_0, hw_compat_7_0_len); 363 } 364 DEFINE_VIRT_MACHINE(7, 0, false) 365 366 static void virt_machine_6_2_options(MachineClass *mc) 367 { 368 virt_machine_7_0_options(mc); 369 compat_props_add(mc->compat_props, hw_compat_6_2, hw_compat_6_2_len); 370 } 371 DEFINE_VIRT_MACHINE(6, 2, false) 372 373 static void virt_machine_6_1_options(MachineClass *mc) 374 { 375 virt_machine_6_2_options(mc); 376 compat_props_add(mc->compat_props, hw_compat_6_1, hw_compat_6_1_len); 377 } 378 DEFINE_VIRT_MACHINE(6, 1, false) 379 380 static void virt_machine_6_0_options(MachineClass *mc) 381 { 382 virt_machine_6_1_options(mc); 383 compat_props_add(mc->compat_props, hw_compat_6_0, hw_compat_6_0_len); 384 } 385 DEFINE_VIRT_MACHINE(6, 0, false) 386