LXR qemu/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
  34static 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
  51static Notifier hppa_system_powerdown_notifier = {
  52    .notify = hppa_powerdown_req
  53};
  54
  55
  56static 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
  78static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr)
  79{
  80    addr &= (0x10000000 - 1);
  81    return addr;
  82}
  83
  84static HPPACPU *cpu[HPPA_MAX_CPUS];
  85static uint64_t firmware_entry;
  86
  87static 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
  93static 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
 125static 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
 330static 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
 360static 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
 375DEFINE_MACHINE("hppa", machine_hppa_machine_init)
 376