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    PCIBus *pci_bus;
  63    ISABus *isa_bus;
  64    qemu_irq rtc_irq, serial_irq;
  65    char *firmware_filename;
  66    uint64_t firmware_low, firmware_high;
  67    long size;
  68    uint64_t kernel_entry = 0, kernel_low, kernel_high;
  69    MemoryRegion *addr_space = get_system_memory();
  70    MemoryRegion *rom_region;
  71    MemoryRegion *ram_region;
  72    MemoryRegion *cpu_region;
  73    long i;
  74
  75    ram_size = machine->ram_size;
  76
  77    /* Create CPUs.  */
  78    for (i = 0; i < smp_cpus; i++) {
  79        cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type));
  80
  81        cpu_region = g_new(MemoryRegion, 1);
  82        memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops,
  83                              cpu[i], g_strdup_printf("cpu%ld-io-eir", i), 4);
  84        memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000,
  85                                    cpu_region);
  86    }
  87
  88    /* Limit main memory. */
  89    if (ram_size > FIRMWARE_START) {
  90        machine->ram_size = ram_size = FIRMWARE_START;
  91    }
  92
  93    /* Main memory region. */
  94    ram_region = g_new(MemoryRegion, 1);
  95    memory_region_allocate_system_memory(ram_region, OBJECT(machine),
  96                                         "ram", ram_size);
  97    memory_region_add_subregion(addr_space, 0, ram_region);
  98
  99    /* Init Dino (PCI host bus chip).  */
 100    pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq);
 101    assert(pci_bus);
 102
 103    /* Create ISA bus. */
 104    isa_bus = hppa_isa_bus();
 105    assert(isa_bus);
 106
 107    /* Realtime clock, used by firmware for PDC_TOD call. */
 108    mc146818_rtc_init(isa_bus, 2000, rtc_irq);
 109
 110    /* Serial code setup.  */
 111    if (serial_hd(0)) {
 112        uint32_t addr = DINO_UART_HPA + 0x800;
 113        serial_mm_init(addr_space, addr, 0, serial_irq,
 114                       115200, serial_hd(0), DEVICE_BIG_ENDIAN);
 115    }
 116
 117    /* SCSI disk setup. */
 118    lsi53c895a_create(pci_bus);
 119
 120    /* Network setup.  e1000 is good enough, failing Tulip support.  */
 121    for (i = 0; i < nb_nics; i++) {
 122        pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
 123    }
 124
 125    /* Load firmware.  Given that this is not "real" firmware,
 126       but one explicitly written for the emulation, we might as
 127       well load it directly from an ELF image.  */
 128    firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 129                                       bios_name ? bios_name :
 130                                       "hppa-firmware.img");
 131    if (firmware_filename == NULL) {
 132        error_report("no firmware provided");
 133        exit(1);
 134    }
 135
 136    size = load_elf(firmware_filename, NULL,
 137                    NULL, &firmware_entry, &firmware_low, &firmware_high,
 138                    true, EM_PARISC, 0, 0);
 139
 140    /* Unfortunately, load_elf sign-extends reading elf32.  */
 141    firmware_entry = (target_ureg)firmware_entry;
 142    firmware_low = (target_ureg)firmware_low;
 143    firmware_high = (target_ureg)firmware_high;
 144
 145    if (size < 0) {
 146        error_report("could not load firmware '%s'", firmware_filename);
 147        exit(1);
 148    }
 149    qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64
 150                  "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n",
 151                  firmware_low, firmware_high, firmware_entry);
 152    if (firmware_low < ram_size || firmware_high >= FIRMWARE_END) {
 153        error_report("Firmware overlaps with memory or IO space");
 154        exit(1);
 155    }
 156    g_free(firmware_filename);
 157
 158    rom_region = g_new(MemoryRegion, 1);
 159    memory_region_allocate_system_memory(rom_region, OBJECT(machine),
 160                                         "firmware",
 161                                         (FIRMWARE_END - FIRMWARE_START));
 162    memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);
 163
 164    /* Load kernel */
 165    if (kernel_filename) {
 166        size = load_elf(kernel_filename, &cpu_hppa_to_phys,
 167                        NULL, &kernel_entry, &kernel_low, &kernel_high,
 168                        true, EM_PARISC, 0, 0);
 169
 170        /* Unfortunately, load_elf sign-extends reading elf32.  */
 171        kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry);
 172        kernel_low = (target_ureg)kernel_low;
 173        kernel_high = (target_ureg)kernel_high;
 174
 175        if (size < 0) {
 176            error_report("could not load kernel '%s'", kernel_filename);
 177            exit(1);
 178        }
 179        qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64
 180                      "-0x%08" PRIx64 ", entry at 0x%08" PRIx64
 181                      ", size %" PRIu64 " kB\n",
 182                      kernel_low, kernel_high, kernel_entry, size / KiB);
 183
 184        if (kernel_cmdline) {
 185            cpu[0]->env.gr[24] = 0x4000;
 186            pstrcpy_targphys("cmdline", cpu[0]->env.gr[24],
 187                             TARGET_PAGE_SIZE, kernel_cmdline);
 188        }
 189
 190        if (initrd_filename) {
 191            ram_addr_t initrd_base;
 192            long initrd_size;
 193
 194            initrd_size = get_image_size(initrd_filename);
 195            if (initrd_size < 0) {
 196                error_report("could not load initial ram disk '%s'",
 197                             initrd_filename);
 198                exit(1);
 199            }
 200
 201            /* Load the initrd image high in memory.
 202               Mirror the algorithm used by palo:
 203               (1) Due to sign-extension problems and PDC,
 204               put the initrd no higher than 1G.
 205               (2) Reserve 64k for stack.  */
 206            initrd_base = MIN(ram_size, 1 * GiB);
 207            initrd_base = initrd_base - 64 * KiB;
 208            initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK;
 209
 210            if (initrd_base < kernel_high) {
 211                error_report("kernel and initial ram disk too large!");
 212                exit(1);
 213            }
 214
 215            load_image_targphys(initrd_filename, initrd_base, initrd_size);
 216            cpu[0]->env.gr[23] = initrd_base;
 217            cpu[0]->env.gr[22] = initrd_base + initrd_size;
 218        }
 219    }
 220
 221    if (!kernel_entry) {
 222        /* When booting via firmware, tell firmware if we want interactive
 223         * mode (kernel_entry=1), and to boot from CD (gr[24]='d')
 224         * or hard disc * (gr[24]='c').
 225         */
 226        kernel_entry = boot_menu ? 1 : 0;
 227        cpu[0]->env.gr[24] = machine->boot_order[0];
 228    }
 229
 230    /* We jump to the firmware entry routine and pass the
 231     * various parameters in registers. After firmware initialization,
 232     * firmware will start the Linux kernel with ramdisk and cmdline.
 233     */
 234    cpu[0]->env.gr[26] = ram_size;
 235    cpu[0]->env.gr[25] = kernel_entry;
 236
 237    /* tell firmware how many SMP CPUs to present in inventory table */
 238    cpu[0]->env.gr[21] = smp_cpus;
 239}
 240
 241static void hppa_machine_reset(void)
 242{
 243    int i;
 244
 245    qemu_devices_reset();
 246
 247    /* Start all CPUs at the firmware entry point.
 248     *  Monarch CPU will initialize firmware, secondary CPUs
 249     *  will enter a small idle look and wait for rendevouz. */
 250    for (i = 0; i < smp_cpus; i++) {
 251        cpu_set_pc(CPU(cpu[i]), firmware_entry);
 252        cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000;
 253    }
 254
 255    /* already initialized by machine_hppa_init()? */
 256    if (cpu[0]->env.gr[26] == ram_size) {
 257        return;
 258    }
 259
 260    cpu[0]->env.gr[26] = ram_size;
 261    cpu[0]->env.gr[25] = 0; /* no firmware boot menu */
 262    cpu[0]->env.gr[24] = 'c';
 263    /* gr22/gr23 unused, no initrd while reboot. */
 264    cpu[0]->env.gr[21] = smp_cpus;
 265}
 266
 267
 268static void machine_hppa_machine_init(MachineClass *mc)
 269{
 270    mc->desc = "HPPA generic machine";
 271    mc->default_cpu_type = TYPE_HPPA_CPU;
 272    mc->init = machine_hppa_init;
 273    mc->reset = hppa_machine_reset;
 274    mc->block_default_type = IF_SCSI;
 275    mc->max_cpus = HPPA_MAX_CPUS;
 276    mc->default_cpus = 1;
 277    mc->is_default = 1;
 278    mc->default_ram_size = 512 * MiB;
 279    mc->default_boot_order = "cd";
 280}
 281
 282DEFINE_MACHINE("hppa", machine_hppa_machine_init)
 283