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-common.h"
   8 #include "qemu/datadir.h"
   9 #include "cpu.h"
  10 #include "elf.h"
  11 #include "hw/loader.h"
  12 #include "qemu/error-report.h"
  13 #include "sysemu/reset.h"
  14 #include "sysemu/sysemu.h"
  15 #include "sysemu/runstate.h"
  16 #include "hw/rtc/mc146818rtc.h"
  17 #include "hw/timer/i8254.h"
  18 #include "hw/char/serial.h"
  19 #include "hw/net/lasi_82596.h"
  20 #include "hppa_sys.h"
  21 #include "qemu/units.h"
  22 #include "qapi/error.h"
  23 #include "net/net.h"
  24 #include "qemu/log.h"
  25 #include "net/net.h"
  26
  27 #define MAX_IDE_BUS 2
  28
  29 #define MIN_SEABIOS_HPPA_VERSION 1 /* require at least this fw version */
  30
  31 #define HPA_POWER_BUTTON (FIRMWARE_END - 0x10)
  32
  33 static void hppa_powerdown_req(Notifier *n, void *opaque)
  34 {
  35     hwaddr soft_power_reg = HPA_POWER_BUTTON;
  36     uint32_t val;
  37
  38     val = ldl_be_phys(&address_space_memory, soft_power_reg);
  39     if ((val >> 8) == 0) {
  40         /* immediately shut down when under hardware control */
  41         qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
  42         return;
  43     }
  44
  45     /* clear bit 31 to indicate that the power switch was pressed. */
  46     val &= ~1;
  47     stl_be_phys(&address_space_memory, soft_power_reg, val);
  48 }
  49
  50 static Notifier hppa_system_powerdown_notifier = {
  51     .notify = hppa_powerdown_req
  52 };
  53
  54
  55 static ISABus *hppa_isa_bus(void)
  56 {
  57     ISABus *isa_bus;
  58     qemu_irq *isa_irqs;
  59     MemoryRegion *isa_region;
  60
  61     isa_region = g_new(MemoryRegion, 1);
  62     memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops,
  63                           NULL, "isa-io", 0x800);
  64     memory_region_add_subregion(get_system_memory(), IDE_HPA,
  65                                 isa_region);
  66
  67     isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region,
  68                           &error_abort);
  69     isa_irqs = i8259_init(isa_bus,
  70                           /* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */
  71                           NULL);
  72     isa_bus_irqs(isa_bus, isa_irqs);
  73
  74     return isa_bus;
  75 }
  76
  77 static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr)
  78 {
  79     addr &= (0x10000000 - 1);
  80     return addr;
  81 }
  82
  83 static HPPACPU *cpu[HPPA_MAX_CPUS];
  84 static uint64_t firmware_entry;
  85
  86 static void fw_cfg_boot_set(void *opaque, const char *boot_device,
  87                             Error **errp)
  88 {
  89     fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
  90 }
  91
  92 static FWCfgState *create_fw_cfg(MachineState *ms)
  93 {
  94     FWCfgState *fw_cfg;
  95     uint64_t val;
  96
  97     fw_cfg = fw_cfg_init_mem(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4);
  98     fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, ms->smp.cpus);
  99     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, HPPA_MAX_CPUS);
 100     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, ms->ram_size);
 101
 102     val = cpu_to_le64(MIN_SEABIOS_HPPA_VERSION);
 103     fw_cfg_add_file(fw_cfg, "/etc/firmware-min-version",
 104                     g_memdup(&val, sizeof(val)), sizeof(val));
 105
 106     val = cpu_to_le64(HPPA_TLB_ENTRIES);
 107     fw_cfg_add_file(fw_cfg, "/etc/cpu/tlb_entries",
 108                     g_memdup(&val, sizeof(val)), sizeof(val));
 109
 110     val = cpu_to_le64(HPPA_BTLB_ENTRIES);
 111     fw_cfg_add_file(fw_cfg, "/etc/cpu/btlb_entries",
 112                     g_memdup(&val, sizeof(val)), sizeof(val));
 113
 114     val = cpu_to_le64(HPA_POWER_BUTTON);
 115     fw_cfg_add_file(fw_cfg, "/etc/power-button-addr",
 116                     g_memdup(&val, sizeof(val)), sizeof(val));
 117
 118     fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, ms->boot_order[0]);
 119     qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
 120
 121     return fw_cfg;
 122 }
 123
 124 static void machine_hppa_init(MachineState *machine)
 125 {
 126     const char *kernel_filename = machine->kernel_filename;
 127     const char *kernel_cmdline = machine->kernel_cmdline;
 128     const char *initrd_filename = machine->initrd_filename;
 129     DeviceState *dev;
 130     PCIBus *pci_bus;
 131     ISABus *isa_bus;
 132     qemu_irq rtc_irq, serial_irq;
 133     char *firmware_filename;
 134     uint64_t firmware_low, firmware_high;
 135     long size;
 136     uint64_t kernel_entry = 0, kernel_low, kernel_high;
 137     MemoryRegion *addr_space = get_system_memory();
 138     MemoryRegion *rom_region;
 139     MemoryRegion *cpu_region;
 140     long i;
 141     unsigned int smp_cpus = machine->smp.cpus;
 142     SysBusDevice *s;
 143
 144     /* Create CPUs.  */
 145     for (i = 0; i < smp_cpus; i++) {
 146         char *name = g_strdup_printf("cpu%ld-io-eir", i);
 147         cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type));
 148
 149         cpu_region = g_new(MemoryRegion, 1);
 150         memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops,
 151                               cpu[i], name, 4);
 152         memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000,
 153                                     cpu_region);
 154         g_free(name);
 155     }
 156
 157     /* Main memory region. */
 158     if (machine->ram_size > 3 * GiB) {
 159         error_report("RAM size is currently restricted to 3GB");
 160         exit(EXIT_FAILURE);
 161     }
 162     memory_region_add_subregion_overlap(addr_space, 0, machine->ram, -1);
 163
 164
 165     /* Init Lasi chip */
 166     lasi_init(addr_space);
 167
 168     /* Init Dino (PCI host bus chip).  */
 169     pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq);
 170     assert(pci_bus);
 171
 172     /* Create ISA bus. */
 173     isa_bus = hppa_isa_bus();
 174     assert(isa_bus);
 175
 176     /* Realtime clock, used by firmware for PDC_TOD call. */
 177     mc146818_rtc_init(isa_bus, 2000, rtc_irq);
 178
 179     /* Serial code setup.  */
 180     if (serial_hd(0)) {
 181         uint32_t addr = DINO_UART_HPA + 0x800;
 182         serial_mm_init(addr_space, addr, 0, serial_irq,
 183                        115200, serial_hd(0), DEVICE_BIG_ENDIAN);
 184     }
 185
 186     /* fw_cfg configuration interface */
 187     create_fw_cfg(machine);
 188
 189     /* SCSI disk setup. */
 190     dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
 191     lsi53c8xx_handle_legacy_cmdline(dev);
 192
 193     /* Graphics setup. */
 194     if (machine->enable_graphics && vga_interface_type != VGA_NONE) {
 195         dev = qdev_new("artist");
 196         s = SYS_BUS_DEVICE(dev);
 197         sysbus_realize_and_unref(s, &error_fatal);
 198         sysbus_mmio_map(s, 0, LASI_GFX_HPA);
 199         sysbus_mmio_map(s, 1, ARTIST_FB_ADDR);
 200     }
 201
 202     /* Network setup. */
 203     for (i = 0; i < nb_nics; i++) {
 204         if (!enable_lasi_lan()) {
 205             pci_nic_init_nofail(&nd_table[i], pci_bus, "tulip", NULL);
 206         }
 207     }
 208
 209     /* register power switch emulation */
 210     qemu_register_powerdown_notifier(&hppa_system_powerdown_notifier);
 211
 212     /* Load firmware.  Given that this is not "real" firmware,
 213        but one explicitly written for the emulation, we might as
 214        well load it directly from an ELF image.  */
 215     firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 216                                        machine->firmware ?: "hppa-firmware.img");
 217     if (firmware_filename == NULL) {
 218         error_report("no firmware provided");
 219         exit(1);
 220     }
 221
 222     size = load_elf(firmware_filename, NULL, NULL, NULL,
 223                     &firmware_entry, &firmware_low, &firmware_high, NULL,
 224                     true, EM_PARISC, 0, 0);
 225
 226     /* Unfortunately, load_elf sign-extends reading elf32.  */
 227     firmware_entry = (target_ureg)firmware_entry;
 228     firmware_low = (target_ureg)firmware_low;
 229     firmware_high = (target_ureg)firmware_high;
 230
 231     if (size < 0) {
 232         error_report("could not load firmware '%s'", firmware_filename);
 233         exit(1);
 234     }
 235     qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64
 236                   "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n",
 237                   firmware_low, firmware_high, firmware_entry);
 238     if (firmware_low < FIRMWARE_START || firmware_high >= FIRMWARE_END) {
 239         error_report("Firmware overlaps with memory or IO space");
 240         exit(1);
 241     }
 242     g_free(firmware_filename);
 243
 244     rom_region = g_new(MemoryRegion, 1);
 245     memory_region_init_ram(rom_region, NULL, "firmware",
 246                            (FIRMWARE_END - FIRMWARE_START), &error_fatal);
 247     memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);
 248
 249     /* Load kernel */
 250     if (kernel_filename) {
 251         size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys,
 252                         NULL, &kernel_entry, &kernel_low, &kernel_high, NULL,
 253                         true, EM_PARISC, 0, 0);
 254
 255         /* Unfortunately, load_elf sign-extends reading elf32.  */
 256         kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry);
 257         kernel_low = (target_ureg)kernel_low;
 258         kernel_high = (target_ureg)kernel_high;
 259
 260         if (size < 0) {
 261             error_report("could not load kernel '%s'", kernel_filename);
 262             exit(1);
 263         }
 264         qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64
 265                       "-0x%08" PRIx64 ", entry at 0x%08" PRIx64
 266                       ", size %" PRIu64 " kB\n",
 267                       kernel_low, kernel_high, kernel_entry, size / KiB);
 268
 269         if (kernel_cmdline) {
 270             cpu[0]->env.gr[24] = 0x4000;
 271             pstrcpy_targphys("cmdline", cpu[0]->env.gr[24],
 272                              TARGET_PAGE_SIZE, kernel_cmdline);
 273         }
 274
 275         if (initrd_filename) {
 276             ram_addr_t initrd_base;
 277             int64_t initrd_size;
 278
 279             initrd_size = get_image_size(initrd_filename);
 280             if (initrd_size < 0) {
 281                 error_report("could not load initial ram disk '%s'",
 282                              initrd_filename);
 283                 exit(1);
 284             }
 285
 286             /* Load the initrd image high in memory.
 287                Mirror the algorithm used by palo:
 288                (1) Due to sign-extension problems and PDC,
 289                put the initrd no higher than 1G.
 290                (2) Reserve 64k for stack.  */
 291             initrd_base = MIN(machine->ram_size, 1 * GiB);
 292             initrd_base = initrd_base - 64 * KiB;
 293             initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK;
 294
 295             if (initrd_base < kernel_high) {
 296                 error_report("kernel and initial ram disk too large!");
 297                 exit(1);
 298             }
 299
 300             load_image_targphys(initrd_filename, initrd_base, initrd_size);
 301             cpu[0]->env.gr[23] = initrd_base;
 302             cpu[0]->env.gr[22] = initrd_base + initrd_size;
 303         }
 304     }
 305
 306     if (!kernel_entry) {
 307         /* When booting via firmware, tell firmware if we want interactive
 308          * mode (kernel_entry=1), and to boot from CD (gr[24]='d')
 309          * or hard disc * (gr[24]='c').
 310          */
 311         kernel_entry = boot_menu ? 1 : 0;
 312         cpu[0]->env.gr[24] = machine->boot_order[0];
 313     }
 314
 315     /* We jump to the firmware entry routine and pass the
 316      * various parameters in registers. After firmware initialization,
 317      * firmware will start the Linux kernel with ramdisk and cmdline.
 318      */
 319     cpu[0]->env.gr[26] = machine->ram_size;
 320     cpu[0]->env.gr[25] = kernel_entry;
 321
 322     /* tell firmware how many SMP CPUs to present in inventory table */
 323     cpu[0]->env.gr[21] = smp_cpus;
 324
 325     /* tell firmware fw_cfg port */
 326     cpu[0]->env.gr[19] = FW_CFG_IO_BASE;
 327 }
 328
 329 static void hppa_machine_reset(MachineState *ms)
 330 {
 331     unsigned int smp_cpus = ms->smp.cpus;
 332     int i;
 333
 334     qemu_devices_reset();
 335
 336     /* Start all CPUs at the firmware entry point.
 337      *  Monarch CPU will initialize firmware, secondary CPUs
 338      *  will enter a small idle look and wait for rendevouz. */
 339     for (i = 0; i < smp_cpus; i++) {
 340         cpu_set_pc(CPU(cpu[i]), firmware_entry);
 341         cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000;
 342     }
 343
 344     /* already initialized by machine_hppa_init()? */
 345     if (cpu[0]->env.gr[26] == ms->ram_size) {
 346         return;
 347     }
 348
 349     cpu[0]->env.gr[26] = ms->ram_size;
 350     cpu[0]->env.gr[25] = 0; /* no firmware boot menu */
 351     cpu[0]->env.gr[24] = 'c';
 352     /* gr22/gr23 unused, no initrd while reboot. */
 353     cpu[0]->env.gr[21] = smp_cpus;
 354     /* tell firmware fw_cfg port */
 355     cpu[0]->env.gr[19] = FW_CFG_IO_BASE;
 356 }
 357
 358
 359 static void machine_hppa_machine_init(MachineClass *mc)
 360 {
 361     mc->desc = "HPPA generic machine";
 362     mc->default_cpu_type = TYPE_HPPA_CPU;
 363     mc->init = machine_hppa_init;
 364     mc->reset = hppa_machine_reset;
 365     mc->block_default_type = IF_SCSI;
 366     mc->max_cpus = HPPA_MAX_CPUS;
 367     mc->default_cpus = 1;
 368     mc->is_default = true;
 369     mc->default_ram_size = 512 * MiB;
 370     mc->default_boot_order = "cd";
 371     mc->default_ram_id = "ram";
 372 }
 373
 374 DEFINE_MACHINE("hppa", machine_hppa_machine_init)