hw/m68k/q800.c

   1 /*
   2  * QEMU Motorla 680x0 Macintosh hardware System Emulator
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  20  * THE SOFTWARE.
  21  */
  22
  23 #include "qemu/osdep.h"
  24 #include "qemu/units.h"
  25 #include "qemu-common.h"
  26 #include "qemu/datadir.h"
  27 #include "sysemu/sysemu.h"
  28 #include "cpu.h"
  29 #include "hw/hw.h"
  30 #include "hw/boards.h"
  31 #include "hw/irq.h"
  32 #include "elf.h"
  33 #include "hw/loader.h"
  34 #include "ui/console.h"
  35 #include "exec/address-spaces.h"
  36 #include "hw/char/escc.h"
  37 #include "hw/sysbus.h"
  38 #include "hw/scsi/esp.h"
  39 #include "bootinfo.h"
  40 #include "hw/misc/mac_via.h"
  41 #include "hw/input/adb.h"
  42 #include "hw/nubus/mac-nubus-bridge.h"
  43 #include "hw/display/macfb.h"
  44 #include "hw/block/swim.h"
  45 #include "net/net.h"
  46 #include "qapi/error.h"
  47 #include "sysemu/qtest.h"
  48 #include "sysemu/runstate.h"
  49 #include "sysemu/reset.h"
  50
  51 #define MACROM_ADDR     0x40800000
  52 #define MACROM_SIZE     0x00100000
  53
  54 #define MACROM_FILENAME "MacROM.bin"
  55
  56 #define Q800_MACHINE_ID 35
  57 #define Q800_CPU_ID (1 << 2)
  58 #define Q800_FPU_ID (1 << 2)
  59 #define Q800_MMU_ID (1 << 2)
  60
  61 #define MACH_MAC        3
  62 #define Q800_MAC_CPU_ID 2
  63
  64 #define IO_BASE               0x50000000
  65 #define IO_SLICE              0x00040000
  66 #define IO_SIZE               0x04000000
  67
  68 #define VIA_BASE              (IO_BASE + 0x00000)
  69 #define SONIC_PROM_BASE       (IO_BASE + 0x08000)
  70 #define SONIC_BASE            (IO_BASE + 0x0a000)
  71 #define SCC_BASE              (IO_BASE + 0x0c020)
  72 #define ESP_BASE              (IO_BASE + 0x10000)
  73 #define ESP_PDMA              (IO_BASE + 0x10100)
  74 #define ASC_BASE              (IO_BASE + 0x14000)
  75 #define SWIM_BASE             (IO_BASE + 0x1E000)
  76
  77 #define NUBUS_SUPER_SLOT_BASE 0x60000000
  78 #define NUBUS_SLOT_BASE       0xf0000000
  79
  80 /*
  81  * the video base, whereas it a Nubus address,
  82  * is needed by the kernel to have early display and
  83  * thus provided by the bootloader
  84  */
  85 #define VIDEO_BASE            0xf9001000
  86
  87 #define MAC_CLOCK  3686418
  88
  89 /*
  90  * The GLUE (General Logic Unit) is an Apple custom integrated circuit chip
  91  * that performs a variety of functions (RAM management, clock generation, ...).
  92  * The GLUE chip receives interrupt requests from various devices,
  93  * assign priority to each, and asserts one or more interrupt line to the
  94  * CPU.
  95  */
  96
  97 typedef struct {
  98     M68kCPU *cpu;
  99     uint8_t ipr;
 100 } GLUEState;
 101
 102 static void GLUE_set_irq(void *opaque, int irq, int level)
 103 {
 104     GLUEState *s = opaque;
 105     int i;
 106
 107     if (level) {
 108         s->ipr |= 1 << irq;
 109     } else {
 110         s->ipr &= ~(1 << irq);
 111     }
 112
 113     for (i = 7; i >= 0; i--) {
 114         if ((s->ipr >> i) & 1) {
 115             m68k_set_irq_level(s->cpu, i + 1, i + 25);
 116             return;
 117         }
 118     }
 119     m68k_set_irq_level(s->cpu, 0, 0);
 120 }
 121
 122 static void main_cpu_reset(void *opaque)
 123 {
 124     M68kCPU *cpu = opaque;
 125     CPUState *cs = CPU(cpu);
 126
 127     cpu_reset(cs);
 128     cpu->env.aregs[7] = ldl_phys(cs->as, 0);
 129     cpu->env.pc = ldl_phys(cs->as, 4);
 130 }
 131
 132 static uint8_t fake_mac_rom[] = {
 133     0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 134
 135     /* offset: 0xa - mac_reset */
 136
 137     /* via2[vDirB] |= VIA2B_vPower */
 138     0x20, 0x7C, 0x50, 0xF0, 0x24, 0x00, /* moveal VIA2_BASE+vDirB,%a0 */
 139     0x10, 0x10,                         /* moveb %a0@,%d0 */
 140     0x00, 0x00, 0x00, 0x04,             /* orib #4,%d0 */
 141     0x10, 0x80,                         /* moveb %d0,%a0@ */
 142
 143     /* via2[vBufB] &= ~VIA2B_vPower */
 144     0x20, 0x7C, 0x50, 0xF0, 0x20, 0x00, /* moveal VIA2_BASE+vBufB,%a0 */
 145     0x10, 0x10,                         /* moveb %a0@,%d0 */
 146     0x02, 0x00, 0xFF, 0xFB,             /* andib #-5,%d0 */
 147     0x10, 0x80,                         /* moveb %d0,%a0@ */
 148
 149     /* while (true) ; */
 150     0x60, 0xFE                          /* bras [self] */
 151 };
 152
 153 static void q800_init(MachineState *machine)
 154 {
 155     M68kCPU *cpu = NULL;
 156     int linux_boot;
 157     int32_t kernel_size;
 158     uint64_t elf_entry;
 159     char *filename;
 160     int bios_size;
 161     ram_addr_t initrd_base;
 162     int32_t initrd_size;
 163     MemoryRegion *rom;
 164     MemoryRegion *io;
 165     const int io_slice_nb = (IO_SIZE / IO_SLICE) - 1;
 166     int i;
 167     ram_addr_t ram_size = machine->ram_size;
 168     const char *kernel_filename = machine->kernel_filename;
 169     const char *initrd_filename = machine->initrd_filename;
 170     const char *kernel_cmdline = machine->kernel_cmdline;
 171     const char *bios_name = machine->firmware ?: MACROM_FILENAME;
 172     hwaddr parameters_base;
 173     CPUState *cs;
 174     DeviceState *dev;
 175     DeviceState *via_dev;
 176     SysBusESPState *sysbus_esp;
 177     ESPState *esp;
 178     SysBusDevice *sysbus;
 179     BusState *adb_bus;
 180     NubusBus *nubus;
 181     GLUEState *irq;
 182     qemu_irq *pic;
 183     DriveInfo *dinfo;
 184
 185     linux_boot = (kernel_filename != NULL);
 186
 187     if (ram_size > 1 * GiB) {
 188         error_report("Too much memory for this machine: %" PRId64 " MiB, "
 189                      "maximum 1024 MiB", ram_size / MiB);
 190         exit(1);
 191     }
 192
 193     /* init CPUs */
 194     cpu = M68K_CPU(cpu_create(machine->cpu_type));
 195     qemu_register_reset(main_cpu_reset, cpu);
 196
 197     /* RAM */
 198     memory_region_add_subregion(get_system_memory(), 0, machine->ram);
 199
 200     /*
 201      * Memory from IO_BASE to IO_BASE + IO_SLICE is repeated
 202      * from IO_BASE + IO_SLICE to IO_BASE + IO_SIZE
 203      */
 204     io = g_new(MemoryRegion, io_slice_nb);
 205     for (i = 0; i < io_slice_nb; i++) {
 206         char *name = g_strdup_printf("mac_m68k.io[%d]", i + 1);
 207
 208         memory_region_init_alias(&io[i], NULL, name, get_system_memory(),
 209                                  IO_BASE, IO_SLICE);
 210         memory_region_add_subregion(get_system_memory(),
 211                                     IO_BASE + (i + 1) * IO_SLICE, &io[i]);
 212         g_free(name);
 213     }
 214
 215     /* IRQ Glue */
 216
 217     irq = g_new0(GLUEState, 1);
 218     irq->cpu = cpu;
 219     pic = qemu_allocate_irqs(GLUE_set_irq, irq, 8);
 220
 221     /* VIA */
 222
 223     via_dev = qdev_new(TYPE_MAC_VIA);
 224     dinfo = drive_get(IF_MTD, 0, 0);
 225     if (dinfo) {
 226         qdev_prop_set_drive(via_dev, "drive", blk_by_legacy_dinfo(dinfo));
 227     }
 228     sysbus = SYS_BUS_DEVICE(via_dev);
 229     sysbus_realize_and_unref(sysbus, &error_fatal);
 230     sysbus_mmio_map(sysbus, 0, VIA_BASE);
 231     qdev_connect_gpio_out_named(DEVICE(sysbus), "irq", 0, pic[0]);
 232     qdev_connect_gpio_out_named(DEVICE(sysbus), "irq", 1, pic[1]);
 233
 234
 235     adb_bus = qdev_get_child_bus(via_dev, "adb.0");
 236     dev = qdev_new(TYPE_ADB_KEYBOARD);
 237     qdev_realize_and_unref(dev, adb_bus, &error_fatal);
 238     dev = qdev_new(TYPE_ADB_MOUSE);
 239     qdev_realize_and_unref(dev, adb_bus, &error_fatal);
 240
 241     /* MACSONIC */
 242
 243     if (nb_nics > 1) {
 244         error_report("q800 can only have one ethernet interface");
 245         exit(1);
 246     }
 247
 248     qemu_check_nic_model(&nd_table[0], "dp83932");
 249
 250     /*
 251      * MacSonic driver needs an Apple MAC address
 252      * Valid prefix are:
 253      * 00:05:02 Apple
 254      * 00:80:19 Dayna Communications, Inc.
 255      * 00:A0:40 Apple
 256      * 08:00:07 Apple
 257      * (Q800 use the last one)
 258      */
 259     nd_table[0].macaddr.a[0] = 0x08;
 260     nd_table[0].macaddr.a[1] = 0x00;
 261     nd_table[0].macaddr.a[2] = 0x07;
 262
 263     dev = qdev_new("dp8393x");
 264     qdev_set_nic_properties(dev, &nd_table[0]);
 265     qdev_prop_set_uint8(dev, "it_shift", 2);
 266     qdev_prop_set_bit(dev, "big_endian", true);
 267     object_property_set_link(OBJECT(dev), "dma_mr",
 268                              OBJECT(get_system_memory()), &error_abort);
 269     sysbus = SYS_BUS_DEVICE(dev);
 270     sysbus_realize_and_unref(sysbus, &error_fatal);
 271     sysbus_mmio_map(sysbus, 0, SONIC_BASE);
 272     sysbus_mmio_map(sysbus, 1, SONIC_PROM_BASE);
 273     sysbus_connect_irq(sysbus, 0, pic[2]);
 274
 275     /* SCC */
 276
 277     dev = qdev_new(TYPE_ESCC);
 278     qdev_prop_set_uint32(dev, "disabled", 0);
 279     qdev_prop_set_uint32(dev, "frequency", MAC_CLOCK);
 280     qdev_prop_set_uint32(dev, "it_shift", 1);
 281     qdev_prop_set_bit(dev, "bit_swap", true);
 282     qdev_prop_set_chr(dev, "chrA", serial_hd(0));
 283     qdev_prop_set_chr(dev, "chrB", serial_hd(1));
 284     qdev_prop_set_uint32(dev, "chnBtype", 0);
 285     qdev_prop_set_uint32(dev, "chnAtype", 0);
 286     sysbus = SYS_BUS_DEVICE(dev);
 287     sysbus_realize_and_unref(sysbus, &error_fatal);
 288     sysbus_connect_irq(sysbus, 0, pic[3]);
 289     sysbus_connect_irq(sysbus, 1, pic[3]);
 290     sysbus_mmio_map(sysbus, 0, SCC_BASE);
 291
 292     /* SCSI */
 293
 294     dev = qdev_new(TYPE_ESP);
 295     sysbus_esp = ESP(dev);
 296     esp = &sysbus_esp->esp;
 297     esp->dma_memory_read = NULL;
 298     esp->dma_memory_write = NULL;
 299     esp->dma_opaque = NULL;
 300     sysbus_esp->it_shift = 4;
 301     esp->dma_enabled = 1;
 302
 303     sysbus = SYS_BUS_DEVICE(dev);
 304     sysbus_realize_and_unref(sysbus, &error_fatal);
 305     sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in_named(via_dev,
 306                                                          "via2-irq",
 307                                                          VIA2_IRQ_SCSI_BIT));
 308     sysbus_connect_irq(sysbus, 1,
 309                        qdev_get_gpio_in_named(via_dev, "via2-irq",
 310                                               VIA2_IRQ_SCSI_DATA_BIT));
 311     sysbus_mmio_map(sysbus, 0, ESP_BASE);
 312     sysbus_mmio_map(sysbus, 1, ESP_PDMA);
 313
 314     scsi_bus_legacy_handle_cmdline(&esp->bus);
 315
 316     /* SWIM floppy controller */
 317
 318     dev = qdev_new(TYPE_SWIM);
 319     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 320     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, SWIM_BASE);
 321
 322     /* NuBus */
 323
 324     dev = qdev_new(TYPE_MAC_NUBUS_BRIDGE);
 325     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 326     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, NUBUS_SUPER_SLOT_BASE);
 327     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, NUBUS_SLOT_BASE);
 328
 329     nubus = MAC_NUBUS_BRIDGE(dev)->bus;
 330
 331     /* framebuffer in nubus slot #9 */
 332
 333     dev = qdev_new(TYPE_NUBUS_MACFB);
 334     qdev_prop_set_uint32(dev, "width", graphic_width);
 335     qdev_prop_set_uint32(dev, "height", graphic_height);
 336     qdev_prop_set_uint8(dev, "depth", graphic_depth);
 337     qdev_realize_and_unref(dev, BUS(nubus), &error_fatal);
 338
 339     cs = CPU(cpu);
 340     if (linux_boot) {
 341         uint64_t high;
 342         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
 343                                &elf_entry, NULL, &high, NULL, 1,
 344                                EM_68K, 0, 0);
 345         if (kernel_size < 0) {
 346             error_report("could not load kernel '%s'", kernel_filename);
 347             exit(1);
 348         }
 349         stl_phys(cs->as, 4, elf_entry); /* reset initial PC */
 350         parameters_base = (high + 1) & ~1;
 351
 352         BOOTINFO1(cs->as, parameters_base, BI_MACHTYPE, MACH_MAC);
 353         BOOTINFO1(cs->as, parameters_base, BI_FPUTYPE, Q800_FPU_ID);
 354         BOOTINFO1(cs->as, parameters_base, BI_MMUTYPE, Q800_MMU_ID);
 355         BOOTINFO1(cs->as, parameters_base, BI_CPUTYPE, Q800_CPU_ID);
 356         BOOTINFO1(cs->as, parameters_base, BI_MAC_CPUID, Q800_MAC_CPU_ID);
 357         BOOTINFO1(cs->as, parameters_base, BI_MAC_MODEL, Q800_MACHINE_ID);
 358         BOOTINFO1(cs->as, parameters_base,
 359                   BI_MAC_MEMSIZE, ram_size >> 20); /* in MB */
 360         BOOTINFO2(cs->as, parameters_base, BI_MEMCHUNK, 0, ram_size);
 361         BOOTINFO1(cs->as, parameters_base, BI_MAC_VADDR, VIDEO_BASE);
 362         BOOTINFO1(cs->as, parameters_base, BI_MAC_VDEPTH, graphic_depth);
 363         BOOTINFO1(cs->as, parameters_base, BI_MAC_VDIM,
 364                   (graphic_height << 16) | graphic_width);
 365         BOOTINFO1(cs->as, parameters_base, BI_MAC_VROW,
 366                   (graphic_width * graphic_depth + 7) / 8);
 367         BOOTINFO1(cs->as, parameters_base, BI_MAC_SCCBASE, SCC_BASE);
 368
 369         rom = g_malloc(sizeof(*rom));
 370         memory_region_init_ram_ptr(rom, NULL, "m68k_fake_mac.rom",
 371                                    sizeof(fake_mac_rom), fake_mac_rom);
 372         memory_region_set_readonly(rom, true);
 373         memory_region_add_subregion(get_system_memory(), MACROM_ADDR, rom);
 374
 375         if (kernel_cmdline) {
 376             BOOTINFOSTR(cs->as, parameters_base, BI_COMMAND_LINE,
 377                         kernel_cmdline);
 378         }
 379
 380         /* load initrd */
 381         if (initrd_filename) {
 382             initrd_size = get_image_size(initrd_filename);
 383             if (initrd_size < 0) {
 384                 error_report("could not load initial ram disk '%s'",
 385                              initrd_filename);
 386                 exit(1);
 387             }
 388
 389             initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK;
 390             load_image_targphys(initrd_filename, initrd_base,
 391                                 ram_size - initrd_base);
 392             BOOTINFO2(cs->as, parameters_base, BI_RAMDISK, initrd_base,
 393                       initrd_size);
 394         } else {
 395             initrd_base = 0;
 396             initrd_size = 0;
 397         }
 398         BOOTINFO0(cs->as, parameters_base, BI_LAST);
 399     } else {
 400         uint8_t *ptr;
 401         /* allocate and load BIOS */
 402         rom = g_malloc(sizeof(*rom));
 403         memory_region_init_rom(rom, NULL, "m68k_mac.rom", MACROM_SIZE,
 404                                &error_abort);
 405         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 406         memory_region_add_subregion(get_system_memory(), MACROM_ADDR, rom);
 407
 408         /* Load MacROM binary */
 409         if (filename) {
 410             bios_size = load_image_targphys(filename, MACROM_ADDR, MACROM_SIZE);
 411             g_free(filename);
 412         } else {
 413             bios_size = -1;
 414         }
 415
 416         /* Remove qtest_enabled() check once firmware files are in the tree */
 417         if (!qtest_enabled()) {
 418             if (bios_size < 0 || bios_size > MACROM_SIZE) {
 419                 error_report("could not load MacROM '%s'", bios_name);
 420                 exit(1);
 421             }
 422
 423             ptr = rom_ptr(MACROM_ADDR, MACROM_SIZE);
 424             stl_phys(cs->as, 0, ldl_p(ptr));    /* reset initial SP */
 425             stl_phys(cs->as, 4,
 426                      MACROM_ADDR + ldl_p(ptr + 4)); /* reset initial PC */
 427         }
 428     }
 429 }
 430
 431 static void q800_machine_class_init(ObjectClass *oc, void *data)
 432 {
 433     MachineClass *mc = MACHINE_CLASS(oc);
 434     mc->desc = "Macintosh Quadra 800";
 435     mc->init = q800_init;
 436     mc->default_cpu_type = M68K_CPU_TYPE_NAME("m68040");
 437     mc->max_cpus = 1;
 438     mc->block_default_type = IF_SCSI;
 439     mc->default_ram_id = "m68k_mac.ram";
 440 }
 441
 442 static const TypeInfo q800_machine_typeinfo = {
 443     .name       = MACHINE_TYPE_NAME("q800"),
 444     .parent     = TYPE_MACHINE,
 445     .class_init = q800_machine_class_init,
 446 };
 447
 448 static void q800_machine_register_types(void)
 449 {
 450     type_register_static(&q800_machine_typeinfo);
 451 }
 452
 453 type_init(q800_machine_register_types)