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