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 "hw/hw.h"
  10#include "elf.h"
  11#include "hw/loader.h"
  12#include "hw/boards.h"
  13#include "qemu/error-report.h"
  14#include "sysemu/sysemu.h"
  15#include "hw/timer/mc146818rtc.h"
  16#include "hw/ide.h"
  17#include "hw/timer/i8254.h"
  18#include "hw/char/serial.h"
  19#include "hppa_sys.h"
  20#include "qemu/units.h"
  21#include "qapi/error.h"
  22#include "qemu/log.h"
  23
  24#define MAX_IDE_BUS 2
  25
  26static ISABus *hppa_isa_bus(void)
  27{
  28    ISABus *isa_bus;
  29    qemu_irq *isa_irqs;
  30    MemoryRegion *isa_region;
  31
  32    isa_region = g_new(MemoryRegion, 1);
  33    memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops,
  34                          NULL, "isa-io", 0x800);
  35    memory_region_add_subregion(get_system_memory(), IDE_HPA,
  36                                isa_region);
  37
  38    isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region,
  39                          &error_abort);
  40    isa_irqs = i8259_init(isa_bus,
  41                          /* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */
  42                          NULL);
  43    isa_bus_irqs(isa_bus, isa_irqs);
  44
  45    return isa_bus;
  46}
  47
  48static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr)
  49{
  50    addr &= (0x10000000 - 1);
  51    return addr;
  52}
  53
  54static HPPACPU *cpu[HPPA_MAX_CPUS];
  55static uint64_t firmware_entry;
  56
  57static void machine_hppa_init(MachineState *machine)
  58{
  59    const char *kernel_filename = machine->kernel_filename;
  60    const char *kernel_cmdline = machine->kernel_cmdline;
  61    const char *initrd_filename = machine->initrd_filename;
  62    DeviceState *dev;
  63    PCIBus *pci_bus;
  64    ISABus *isa_bus;
  65    qemu_irq rtc_irq, serial_irq;
  66    char *firmware_filename;
  67    uint64_t firmware_low, firmware_high;
  68    long size;
  69    uint64_t kernel_entry = 0, kernel_low, kernel_high;
  70    MemoryRegion *addr_space = get_system_memory();
  71    MemoryRegion *rom_region;
  72    MemoryRegion *ram_region;
  73    MemoryRegion *cpu_region;
  74    long i;
  75
  76    ram_size = machine->ram_size;
  77
  78    /* Create CPUs.  */
  79    for (i = 0; i < smp_cpus; i++) {
  80        cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type));
  81
  82        cpu_region = g_new(MemoryRegion, 1);
  83        memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops,
  84                              cpu[i], g_strdup_printf("cpu%ld-io-eir", i), 4);
  85        memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000,
  86                                    cpu_region);
  87    }
  88
  89    /* Limit main memory. */
  90    if (ram_size > FIRMWARE_START) {
  91        machine->ram_size = ram_size = FIRMWARE_START;
  92    }
  93
  94    /* Main memory region. */
  95    ram_region = g_new(MemoryRegion, 1);
  96    memory_region_allocate_system_memory(ram_region, OBJECT(machine),
  97                                         "ram", ram_size);
  98    memory_region_add_subregion(addr_space, 0, ram_region);
  99
 100    /* Init Dino (PCI host bus chip).  */
 101    pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq);
 102    assert(pci_bus);
 103
 104    /* Create ISA bus. */
 105    isa_bus = hppa_isa_bus();
 106    assert(isa_bus);
 107
 108    /* Realtime clock, used by firmware for PDC_TOD call. */
 109    mc146818_rtc_init(isa_bus, 2000, rtc_irq);
 110
 111    /* Serial code setup.  */
 112    if (serial_hd(0)) {
 113        uint32_t addr = DINO_UART_HPA + 0x800;
 114        serial_mm_init(addr_space, addr, 0, serial_irq,
 115                       115200, serial_hd(0), DEVICE_BIG_ENDIAN);
 116    }
 117
 118    /* SCSI disk setup. */
 119    dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
 120    lsi53c8xx_handle_legacy_cmdline(dev);
 121
 122    /* Network setup.  e1000 is good enough, failing Tulip support.  */
 123    for (i = 0; i < nb_nics; i++) {
 124        pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
 125    }
 126
 127    /* Load firmware.  Given that this is not "real" firmware,
 128       but one explicitly written for the emulation, we might as
 129       well load it directly from an ELF image.  */
 130    firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 131                                       bios_name ? bios_name :
 132                                       "hppa-firmware.img");
 133    if (firmware_filename == NULL) {
 134        error_report("no firmware provided");
 135        exit(1);
 136    }
 137
 138    size = load_elf(firmware_filename, NULL,
 139                    NULL, &firmware_entry, &firmware_low, &firmware_high,
 140                    true, EM_PARISC, 0, 0);
 141
 142    /* Unfortunately, load_elf sign-extends reading elf32.  */
 143    firmware_entry = (target_ureg)firmware_entry;
 144    firmware_low = (target_ureg)firmware_low;
 145    firmware_high = (target_ureg)firmware_high;
 146
 147    if (size < 0) {
 148        error_report("could not load firmware '%s'", firmware_filename);
 149        exit(1);
 150    }
 151    qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64
 152                  "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n",
 153                  firmware_low, firmware_high, firmware_entry);
 154    if (firmware_low < ram_size || firmware_high >= FIRMWARE_END) {
 155        error_report("Firmware overlaps with memory or IO space");
 156        exit(1);
 157    }
 158    g_free(firmware_filename);
 159
 160    rom_region = g_new(MemoryRegion, 1);
 161    memory_region_allocate_system_memory(rom_region, OBJECT(machine),
 162                                         "firmware",
 163                                         (FIRMWARE_END - FIRMWARE_START));
 164    memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);
 165
 166    /* Load kernel */
 167    if (kernel_filename) {
 168        size = load_elf(kernel_filename, &cpu_hppa_to_phys,
 169                        NULL, &kernel_entry, &kernel_low, &kernel_high,
 170                        true, EM_PARISC, 0, 0);
 171
 172        /* Unfortunately, load_elf sign-extends reading elf32.  */
 173        kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry);
 174        kernel_low = (target_ureg)kernel_low;
 175        kernel_high = (target_ureg)kernel_high;
 176
 177        if (size < 0) {
 178            error_report("could not load kernel '%s'", kernel_filename);
 179            exit(1);
 180        }
 181        qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64
 182                      "-0x%08" PRIx64 ", entry at 0x%08" PRIx64
 183                      ", size %" PRIu64 " kB\n",
 184                      kernel_low, kernel_high, kernel_entry, size / KiB);
 185
 186        if (kernel_cmdline) {
 187            cpu[0]->env.gr[24] = 0x4000;
 188            pstrcpy_targphys("cmdline", cpu[0]->env.gr[24],
 189                             TARGET_PAGE_SIZE, kernel_cmdline);
 190        }
 191
 192        if (initrd_filename) {
 193            ram_addr_t initrd_base;
 194            int64_t initrd_size;
 195
 196            initrd_size = get_image_size(initrd_filename);
 197            if (initrd_size < 0) {
 198                error_report("could not load initial ram disk '%s'",
 199                             initrd_filename);
 200                exit(1);
 201            }
 202
 203            /* Load the initrd image high in memory.
 204               Mirror the algorithm used by palo:
 205               (1) Due to sign-extension problems and PDC,
 206               put the initrd no higher than 1G.
 207               (2) Reserve 64k for stack.  */
 208            initrd_base = MIN(ram_size, 1 * GiB);
 209            initrd_base = initrd_base - 64 * KiB;
 210            initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK;
 211
 212            if (initrd_base < kernel_high) {
 213                error_report("kernel and initial ram disk too large!");
 214                exit(1);
 215            }
 216
 217            load_image_targphys(initrd_filename, initrd_base, initrd_size);
 218            cpu[0]->env.gr[23] = initrd_base;
 219            cpu[0]->env.gr[22] = initrd_base + initrd_size;
 220        }
 221    }
 222
 223    if (!kernel_entry) {
 224        /* When booting via firmware, tell firmware if we want interactive
 225         * mode (kernel_entry=1), and to boot from CD (gr[24]='d')
 226         * or hard disc * (gr[24]='c').
 227         */
 228        kernel_entry = boot_menu ? 1 : 0;
 229        cpu[0]->env.gr[24] = machine->boot_order[0];
 230    }
 231
 232    /* We jump to the firmware entry routine and pass the
 233     * various parameters in registers. After firmware initialization,
 234     * firmware will start the Linux kernel with ramdisk and cmdline.
 235     */
 236    cpu[0]->env.gr[26] = ram_size;
 237    cpu[0]->env.gr[25] = kernel_entry;
 238
 239    /* tell firmware how many SMP CPUs to present in inventory table */
 240    cpu[0]->env.gr[21] = smp_cpus;
 241}
 242
 243static void hppa_machine_reset(void)
 244{
 245    int i;
 246
 247    qemu_devices_reset();
 248
 249    /* Start all CPUs at the firmware entry point.
 250     *  Monarch CPU will initialize firmware, secondary CPUs
 251     *  will enter a small idle look and wait for rendevouz. */
 252    for (i = 0; i < smp_cpus; i++) {
 253        cpu_set_pc(CPU(cpu[i]), firmware_entry);
 254        cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000;
 255    }
 256
 257    /* already initialized by machine_hppa_init()? */
 258    if (cpu[0]->env.gr[26] == ram_size) {
 259        return;
 260    }
 261
 262    cpu[0]->env.gr[26] = ram_size;
 263    cpu[0]->env.gr[25] = 0; /* no firmware boot menu */
 264    cpu[0]->env.gr[24] = 'c';
 265    /* gr22/gr23 unused, no initrd while reboot. */
 266    cpu[0]->env.gr[21] = smp_cpus;
 267}
 268
 269
 270static void machine_hppa_machine_init(MachineClass *mc)
 271{
 272    mc->desc = "HPPA generic machine";
 273    mc->default_cpu_type = TYPE_HPPA_CPU;
 274    mc->init = machine_hppa_init;
 275    mc->reset = hppa_machine_reset;
 276    mc->block_default_type = IF_SCSI;
 277    mc->max_cpus = HPPA_MAX_CPUS;
 278    mc->default_cpus = 1;
 279    mc->is_default = 1;
 280    mc->default_ram_size = 512 * MiB;
 281    mc->default_boot_order = "cd";
 282}
 283
 284DEFINE_MACHINE("hppa", machine_hppa_machine_init)
 285