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