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 "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
  33static 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
  50static Notifier hppa_system_powerdown_notifier = {
  51    .notify = hppa_powerdown_req
  52};
  53
  54
  55static 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
  77static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr)
  78{
  79    addr &= (0x10000000 - 1);
  80    return addr;
  81}
  82
  83static HPPACPU *cpu[HPPA_MAX_CPUS];
  84static uint64_t firmware_entry;
  85
  86static 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
  92static 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
 124static 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
 329static 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
 359static 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
 374DEFINE_MACHINE("hppa", machine_hppa_machine_init)
 375