hw/hppa/machine.c

   1 /*
   2  * QEMU HPPA hardware system emulator.
   3  * Copyright 2018 Helge Deller <deller@gmx.de>
   4  */
   5
   6 #include "qemu/osdep.h"
   7 #include "qemu/datadir.h"
   8 #include "cpu.h"
   9 #include "elf.h"
  10 #include "hw/loader.h"
  11 #include "qemu/error-report.h"
  12 #include "sysemu/reset.h"
  13 #include "sysemu/sysemu.h"
  14 #include "sysemu/runstate.h"
  15 #include "hw/rtc/mc146818rtc.h"
  16 #include "hw/timer/i8254.h"
  17 #include "hw/char/serial.h"
  18 #include "hw/char/parallel.h"
  19 #include "hw/intc/i8259.h"
  20 #include "hw/input/lasips2.h"
  21 #include "hw/net/lasi_82596.h"
  22 #include "hw/nmi.h"
  23 #include "hw/pci/pci.h"
  24 #include "hw/pci-host/dino.h"
  25 #include "hw/misc/lasi.h"
  26 #include "hppa_hardware.h"
  27 #include "qemu/units.h"
  28 #include "qapi/error.h"
  29 #include "net/net.h"
  30 #include "qemu/log.h"
  31 #include "net/net.h"
  32
  33 #define MIN_SEABIOS_HPPA_VERSION 6 /* require at least this fw version */
  34
  35 #define HPA_POWER_BUTTON (FIRMWARE_END - 0x10)
  36
  37 #define enable_lasi_lan()       0
  38
  39
  40 static void hppa_powerdown_req(Notifier *n, void *opaque)
  41 {
  42     hwaddr soft_power_reg = HPA_POWER_BUTTON;
  43     uint32_t val;
  44
  45     val = ldl_be_phys(&address_space_memory, soft_power_reg);
  46     if ((val >> 8) == 0) {
  47         /* immediately shut down when under hardware control */
  48         qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
  49         return;
  50     }
  51
  52     /* clear bit 31 to indicate that the power switch was pressed. */
  53     val &= ~1;
  54     stl_be_phys(&address_space_memory, soft_power_reg, val);
  55 }
  56
  57 static Notifier hppa_system_powerdown_notifier = {
  58     .notify = hppa_powerdown_req
  59 };
  60
  61 /* Fallback for unassigned PCI I/O operations.  Avoids MCHK.  */
  62 static uint64_t ignore_read(void *opaque, hwaddr addr, unsigned size)
  63 {
  64     return 0;
  65 }
  66
  67 static void ignore_write(void *opaque, hwaddr addr, uint64_t v, unsigned size)
  68 {
  69 }
  70
  71 static const MemoryRegionOps hppa_pci_ignore_ops = {
  72     .read = ignore_read,
  73     .write = ignore_write,
  74     .endianness = DEVICE_BIG_ENDIAN,
  75     .valid = {
  76         .min_access_size = 1,
  77         .max_access_size = 8,
  78     },
  79     .impl = {
  80         .min_access_size = 1,
  81         .max_access_size = 8,
  82     },
  83 };
  84
  85 static ISABus *hppa_isa_bus(void)
  86 {
  87     ISABus *isa_bus;
  88     qemu_irq *isa_irqs;
  89     MemoryRegion *isa_region;
  90
  91     isa_region = g_new(MemoryRegion, 1);
  92     memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops,
  93                           NULL, "isa-io", 0x800);
  94     memory_region_add_subregion(get_system_memory(), IDE_HPA,
  95                                 isa_region);
  96
  97     isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region,
  98                           &error_abort);
  99     isa_irqs = i8259_init(isa_bus,
 100                           /* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */
 101                           NULL);
 102     isa_bus_irqs(isa_bus, isa_irqs);
 103
 104     return isa_bus;
 105 }
 106
 107 static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr)
 108 {
 109     addr &= (0x10000000 - 1);
 110     return addr;
 111 }
 112
 113 static HPPACPU *cpu[HPPA_MAX_CPUS];
 114 static uint64_t firmware_entry;
 115
 116 static void fw_cfg_boot_set(void *opaque, const char *boot_device,
 117                             Error **errp)
 118 {
 119     fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
 120 }
 121
 122 static FWCfgState *create_fw_cfg(MachineState *ms)
 123 {
 124     FWCfgState *fw_cfg;
 125     uint64_t val;
 126
 127     fw_cfg = fw_cfg_init_mem(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4);
 128     fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, ms->smp.cpus);
 129     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, HPPA_MAX_CPUS);
 130     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, ms->ram_size);
 131
 132     val = cpu_to_le64(MIN_SEABIOS_HPPA_VERSION);
 133     fw_cfg_add_file(fw_cfg, "/etc/firmware-min-version",
 134                     g_memdup(&val, sizeof(val)), sizeof(val));
 135
 136     val = cpu_to_le64(HPPA_TLB_ENTRIES);
 137     fw_cfg_add_file(fw_cfg, "/etc/cpu/tlb_entries",
 138                     g_memdup(&val, sizeof(val)), sizeof(val));
 139
 140     val = cpu_to_le64(HPPA_BTLB_ENTRIES);
 141     fw_cfg_add_file(fw_cfg, "/etc/cpu/btlb_entries",
 142                     g_memdup(&val, sizeof(val)), sizeof(val));
 143
 144     val = cpu_to_le64(HPA_POWER_BUTTON);
 145     fw_cfg_add_file(fw_cfg, "/etc/power-button-addr",
 146                     g_memdup(&val, sizeof(val)), sizeof(val));
 147
 148     fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, ms->boot_config.order[0]);
 149     qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
 150
 151     return fw_cfg;
 152 }
 153
 154 static LasiState *lasi_init(void)
 155 {
 156     DeviceState *dev;
 157
 158     dev = qdev_new(TYPE_LASI_CHIP);
 159     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 160
 161     return LASI_CHIP(dev);
 162 }
 163
 164 static DinoState *dino_init(MemoryRegion *addr_space)
 165 {
 166     DeviceState *dev;
 167
 168     dev = qdev_new(TYPE_DINO_PCI_HOST_BRIDGE);
 169     object_property_set_link(OBJECT(dev), "memory-as", OBJECT(addr_space),
 170                              &error_fatal);
 171     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 172
 173     return DINO_PCI_HOST_BRIDGE(dev);
 174 }
 175
 176 static void machine_hppa_init(MachineState *machine)
 177 {
 178     const char *kernel_filename = machine->kernel_filename;
 179     const char *kernel_cmdline = machine->kernel_cmdline;
 180     const char *initrd_filename = machine->initrd_filename;
 181     DeviceState *dev, *dino_dev, *lasi_dev;
 182     PCIBus *pci_bus;
 183     ISABus *isa_bus;
 184     char *firmware_filename;
 185     uint64_t firmware_low, firmware_high;
 186     long size;
 187     uint64_t kernel_entry = 0, kernel_low, kernel_high;
 188     MemoryRegion *addr_space = get_system_memory();
 189     MemoryRegion *rom_region;
 190     MemoryRegion *cpu_region;
 191     long i;
 192     unsigned int smp_cpus = machine->smp.cpus;
 193     SysBusDevice *s;
 194
 195     /* Create CPUs.  */
 196     for (i = 0; i < smp_cpus; i++) {
 197         char *name = g_strdup_printf("cpu%ld-io-eir", i);
 198         cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type));
 199
 200         cpu_region = g_new(MemoryRegion, 1);
 201         memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops,
 202                               cpu[i], name, 4);
 203         memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000,
 204                                     cpu_region);
 205         g_free(name);
 206     }
 207
 208     /* Main memory region. */
 209     if (machine->ram_size > 3 * GiB) {
 210         error_report("RAM size is currently restricted to 3GB");
 211         exit(EXIT_FAILURE);
 212     }
 213     memory_region_add_subregion_overlap(addr_space, 0, machine->ram, -1);
 214
 215
 216     /* Init Lasi chip */
 217     lasi_dev = DEVICE(lasi_init());
 218     memory_region_add_subregion(addr_space, LASI_HPA,
 219                                 sysbus_mmio_get_region(
 220                                     SYS_BUS_DEVICE(lasi_dev), 0));
 221
 222     /* Init Dino (PCI host bus chip).  */
 223     dino_dev = DEVICE(dino_init(addr_space));
 224     memory_region_add_subregion(addr_space, DINO_HPA,
 225                                 sysbus_mmio_get_region(
 226                                     SYS_BUS_DEVICE(dino_dev), 0));
 227     pci_bus = PCI_BUS(qdev_get_child_bus(dino_dev, "pci"));
 228     assert(pci_bus);
 229
 230     /* Create ISA bus. */
 231     isa_bus = hppa_isa_bus();
 232     assert(isa_bus);
 233
 234     /* Realtime clock, used by firmware for PDC_TOD call. */
 235     mc146818_rtc_init(isa_bus, 2000, NULL);
 236
 237     /* Serial ports: Lasi and Dino use a 7.272727 MHz clock. */
 238     serial_mm_init(addr_space, LASI_UART_HPA + 0x800, 0,
 239         qdev_get_gpio_in(lasi_dev, LASI_IRQ_UART_HPA), 7272727 / 16,
 240         serial_hd(0), DEVICE_BIG_ENDIAN);
 241
 242     serial_mm_init(addr_space, DINO_UART_HPA + 0x800, 0,
 243         qdev_get_gpio_in(dino_dev, DINO_IRQ_RS232INT), 7272727 / 16,
 244         serial_hd(1), DEVICE_BIG_ENDIAN);
 245
 246     /* Parallel port */
 247     parallel_mm_init(addr_space, LASI_LPT_HPA + 0x800, 0,
 248                      qdev_get_gpio_in(lasi_dev, LASI_IRQ_LAN_HPA),
 249                      parallel_hds[0]);
 250
 251     /* fw_cfg configuration interface */
 252     create_fw_cfg(machine);
 253
 254     /* SCSI disk setup. */
 255     dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
 256     lsi53c8xx_handle_legacy_cmdline(dev);
 257
 258     /* Graphics setup. */
 259     if (machine->enable_graphics && vga_interface_type != VGA_NONE) {
 260         vga_interface_created = true;
 261         dev = qdev_new("artist");
 262         s = SYS_BUS_DEVICE(dev);
 263         sysbus_realize_and_unref(s, &error_fatal);
 264         sysbus_mmio_map(s, 0, LASI_GFX_HPA);
 265         sysbus_mmio_map(s, 1, ARTIST_FB_ADDR);
 266     }
 267
 268     /* Network setup. */
 269     if (enable_lasi_lan()) {
 270         lasi_82596_init(addr_space, LASI_LAN_HPA,
 271                         qdev_get_gpio_in(lasi_dev, LASI_IRQ_LAN_HPA));
 272     }
 273
 274     for (i = 0; i < nb_nics; i++) {
 275         if (!enable_lasi_lan()) {
 276             pci_nic_init_nofail(&nd_table[i], pci_bus, "tulip", NULL);
 277         }
 278     }
 279
 280     /* PS/2 Keyboard/Mouse */
 281     dev = qdev_new(TYPE_LASIPS2);
 282     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 283     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
 284                        qdev_get_gpio_in(lasi_dev, LASI_IRQ_PS2KBD_HPA));
 285     memory_region_add_subregion(addr_space, LASI_PS2KBD_HPA,
 286                                 sysbus_mmio_get_region(SYS_BUS_DEVICE(dev),
 287                                                        0));
 288     memory_region_add_subregion(addr_space, LASI_PS2KBD_HPA + 0x100,
 289                                 sysbus_mmio_get_region(SYS_BUS_DEVICE(dev),
 290                                                        1));
 291
 292     /* register power switch emulation */
 293     qemu_register_powerdown_notifier(&hppa_system_powerdown_notifier);
 294
 295     /* Load firmware.  Given that this is not "real" firmware,
 296        but one explicitly written for the emulation, we might as
 297        well load it directly from an ELF image.  */
 298     firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 299                                        machine->firmware ?: "hppa-firmware.img");
 300     if (firmware_filename == NULL) {
 301         error_report("no firmware provided");
 302         exit(1);
 303     }
 304
 305     size = load_elf(firmware_filename, NULL, NULL, NULL,
 306                     &firmware_entry, &firmware_low, &firmware_high, NULL,
 307                     true, EM_PARISC, 0, 0);
 308
 309     /* Unfortunately, load_elf sign-extends reading elf32.  */
 310     firmware_entry = (target_ureg)firmware_entry;
 311     firmware_low = (target_ureg)firmware_low;
 312     firmware_high = (target_ureg)firmware_high;
 313
 314     if (size < 0) {
 315         error_report("could not load firmware '%s'", firmware_filename);
 316         exit(1);
 317     }
 318     qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64
 319                   "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n",
 320                   firmware_low, firmware_high, firmware_entry);
 321     if (firmware_low < FIRMWARE_START || firmware_high >= FIRMWARE_END) {
 322         error_report("Firmware overlaps with memory or IO space");
 323         exit(1);
 324     }
 325     g_free(firmware_filename);
 326
 327     rom_region = g_new(MemoryRegion, 1);
 328     memory_region_init_ram(rom_region, NULL, "firmware",
 329                            (FIRMWARE_END - FIRMWARE_START), &error_fatal);
 330     memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);
 331
 332     /* Load kernel */
 333     if (kernel_filename) {
 334         size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys,
 335                         NULL, &kernel_entry, &kernel_low, &kernel_high, NULL,
 336                         true, EM_PARISC, 0, 0);
 337
 338         /* Unfortunately, load_elf sign-extends reading elf32.  */
 339         kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry);
 340         kernel_low = (target_ureg)kernel_low;
 341         kernel_high = (target_ureg)kernel_high;
 342
 343         if (size < 0) {
 344             error_report("could not load kernel '%s'", kernel_filename);
 345             exit(1);
 346         }
 347         qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64
 348                       "-0x%08" PRIx64 ", entry at 0x%08" PRIx64
 349                       ", size %" PRIu64 " kB\n",
 350                       kernel_low, kernel_high, kernel_entry, size / KiB);
 351
 352         if (kernel_cmdline) {
 353             cpu[0]->env.gr[24] = 0x4000;
 354             pstrcpy_targphys("cmdline", cpu[0]->env.gr[24],
 355                              TARGET_PAGE_SIZE, kernel_cmdline);
 356         }
 357
 358         if (initrd_filename) {
 359             ram_addr_t initrd_base;
 360             int64_t initrd_size;
 361
 362             initrd_size = get_image_size(initrd_filename);
 363             if (initrd_size < 0) {
 364                 error_report("could not load initial ram disk '%s'",
 365                              initrd_filename);
 366                 exit(1);
 367             }
 368
 369             /* Load the initrd image high in memory.
 370                Mirror the algorithm used by palo:
 371                (1) Due to sign-extension problems and PDC,
 372                put the initrd no higher than 1G.
 373                (2) Reserve 64k for stack.  */
 374             initrd_base = MIN(machine->ram_size, 1 * GiB);
 375             initrd_base = initrd_base - 64 * KiB;
 376             initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK;
 377
 378             if (initrd_base < kernel_high) {
 379                 error_report("kernel and initial ram disk too large!");
 380                 exit(1);
 381             }
 382
 383             load_image_targphys(initrd_filename, initrd_base, initrd_size);
 384             cpu[0]->env.gr[23] = initrd_base;
 385             cpu[0]->env.gr[22] = initrd_base + initrd_size;
 386         }
 387     }
 388
 389     if (!kernel_entry) {
 390         /* When booting via firmware, tell firmware if we want interactive
 391          * mode (kernel_entry=1), and to boot from CD (gr[24]='d')
 392          * or hard disc * (gr[24]='c').
 393          */
 394         kernel_entry = machine->boot_config.has_menu ? machine->boot_config.menu : 0;
 395         cpu[0]->env.gr[24] = machine->boot_config.order[0];
 396     }
 397
 398     /* We jump to the firmware entry routine and pass the
 399      * various parameters in registers. After firmware initialization,
 400      * firmware will start the Linux kernel with ramdisk and cmdline.
 401      */
 402     cpu[0]->env.gr[26] = machine->ram_size;
 403     cpu[0]->env.gr[25] = kernel_entry;
 404
 405     /* tell firmware how many SMP CPUs to present in inventory table */
 406     cpu[0]->env.gr[21] = smp_cpus;
 407
 408     /* tell firmware fw_cfg port */
 409     cpu[0]->env.gr[19] = FW_CFG_IO_BASE;
 410 }
 411
 412 static void hppa_machine_reset(MachineState *ms, ShutdownCause reason)
 413 {
 414     unsigned int smp_cpus = ms->smp.cpus;
 415     int i;
 416
 417     qemu_devices_reset(reason);
 418
 419     /* Start all CPUs at the firmware entry point.
 420      *  Monarch CPU will initialize firmware, secondary CPUs
 421      *  will enter a small idle look and wait for rendevouz. */
 422     for (i = 0; i < smp_cpus; i++) {
 423         cpu_set_pc(CPU(cpu[i]), firmware_entry);
 424         cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000;
 425     }
 426
 427     /* already initialized by machine_hppa_init()? */
 428     if (cpu[0]->env.gr[26] == ms->ram_size) {
 429         return;
 430     }
 431
 432     cpu[0]->env.gr[26] = ms->ram_size;
 433     cpu[0]->env.gr[25] = 0; /* no firmware boot menu */
 434     cpu[0]->env.gr[24] = 'c';
 435     /* gr22/gr23 unused, no initrd while reboot. */
 436     cpu[0]->env.gr[21] = smp_cpus;
 437     /* tell firmware fw_cfg port */
 438     cpu[0]->env.gr[19] = FW_CFG_IO_BASE;
 439 }
 440
 441 static void hppa_nmi(NMIState *n, int cpu_index, Error **errp)
 442 {
 443     CPUState *cs;
 444
 445     CPU_FOREACH(cs) {
 446         cpu_interrupt(cs, CPU_INTERRUPT_NMI);
 447     }
 448 }
 449
 450 static void hppa_machine_init_class_init(ObjectClass *oc, void *data)
 451 {
 452     MachineClass *mc = MACHINE_CLASS(oc);
 453     NMIClass *nc = NMI_CLASS(oc);
 454
 455     mc->desc = "HPPA B160L machine";
 456     mc->default_cpu_type = TYPE_HPPA_CPU;
 457     mc->init = machine_hppa_init;
 458     mc->reset = hppa_machine_reset;
 459     mc->block_default_type = IF_SCSI;
 460     mc->max_cpus = HPPA_MAX_CPUS;
 461     mc->default_cpus = 1;
 462     mc->is_default = true;
 463     mc->default_ram_size = 512 * MiB;
 464     mc->default_boot_order = "cd";
 465     mc->default_ram_id = "ram";
 466
 467     nc->nmi_monitor_handler = hppa_nmi;
 468 }
 469
 470 static const TypeInfo hppa_machine_init_typeinfo = {
 471     .name = MACHINE_TYPE_NAME("hppa"),
 472     .parent = TYPE_MACHINE,
 473     .class_init = hppa_machine_init_class_init,
 474     .interfaces = (InterfaceInfo[]) {
 475         { TYPE_NMI },
 476         { }
 477     },
 478 };
 479
 480 static void hppa_machine_init_register_types(void)
 481 {
 482     type_register_static(&hppa_machine_init_typeinfo);
 483 }
 484
 485 type_init(hppa_machine_init_register_types)