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    unsigned int smp_cpus = machine->smp.cpus;
  76
  77    ram_size = machine->ram_size;
  78
  79    /* Create CPUs.  */
  80    for (i = 0; i < smp_cpus; i++) {
  81        cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type));
  82
  83        cpu_region = g_new(MemoryRegion, 1);
  84        memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops,
  85                              cpu[i], g_strdup_printf("cpu%ld-io-eir", i), 4);
  86        memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000,
  87                                    cpu_region);
  88    }
  89
  90    /* Limit main memory. */
  91    if (ram_size > FIRMWARE_START) {
  92        machine->ram_size = ram_size = FIRMWARE_START;
  93    }
  94
  95    /* Main memory region. */
  96    ram_region = g_new(MemoryRegion, 1);
  97    memory_region_allocate_system_memory(ram_region, OBJECT(machine),
  98                                         "ram", ram_size);
  99    memory_region_add_subregion(addr_space, 0, ram_region);
 100
 101    /* Init Dino (PCI host bus chip).  */
 102    pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq);
 103    assert(pci_bus);
 104
 105    /* Create ISA bus. */
 106    isa_bus = hppa_isa_bus();
 107    assert(isa_bus);
 108
 109    /* Realtime clock, used by firmware for PDC_TOD call. */
 110    mc146818_rtc_init(isa_bus, 2000, rtc_irq);
 111
 112    /* Serial code setup.  */
 113    if (serial_hd(0)) {
 114        uint32_t addr = DINO_UART_HPA + 0x800;
 115        serial_mm_init(addr_space, addr, 0, serial_irq,
 116                       115200, serial_hd(0), DEVICE_BIG_ENDIAN);
 117    }
 118
 119    /* SCSI disk setup. */
 120    dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
 121    lsi53c8xx_handle_legacy_cmdline(dev);
 122
 123    /* Network setup.  e1000 is good enough, failing Tulip support.  */
 124    for (i = 0; i < nb_nics; i++) {
 125        pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
 126    }
 127
 128    /* Load firmware.  Given that this is not "real" firmware,
 129       but one explicitly written for the emulation, we might as
 130       well load it directly from an ELF image.  */
 131    firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 132                                       bios_name ? bios_name :
 133                                       "hppa-firmware.img");
 134    if (firmware_filename == NULL) {
 135        error_report("no firmware provided");
 136        exit(1);
 137    }
 138
 139    size = load_elf(firmware_filename, NULL, NULL, NULL,
 140                    &firmware_entry, &firmware_low, &firmware_high,
 141                    true, EM_PARISC, 0, 0);
 142
 143    /* Unfortunately, load_elf sign-extends reading elf32.  */
 144    firmware_entry = (target_ureg)firmware_entry;
 145    firmware_low = (target_ureg)firmware_low;
 146    firmware_high = (target_ureg)firmware_high;
 147
 148    if (size < 0) {
 149        error_report("could not load firmware '%s'", firmware_filename);
 150        exit(1);
 151    }
 152    qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64
 153                  "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n",
 154                  firmware_low, firmware_high, firmware_entry);
 155    if (firmware_low < ram_size || firmware_high >= FIRMWARE_END) {
 156        error_report("Firmware overlaps with memory or IO space");
 157        exit(1);
 158    }
 159    g_free(firmware_filename);
 160
 161    rom_region = g_new(MemoryRegion, 1);
 162    memory_region_allocate_system_memory(rom_region, OBJECT(machine),
 163                                         "firmware",
 164                                         (FIRMWARE_END - FIRMWARE_START));
 165    memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);
 166
 167    /* Load kernel */
 168    if (kernel_filename) {
 169        size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys,
 170                        NULL, &kernel_entry, &kernel_low, &kernel_high,
 171                        true, EM_PARISC, 0, 0);
 172
 173        /* Unfortunately, load_elf sign-extends reading elf32.  */
 174        kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry);
 175        kernel_low = (target_ureg)kernel_low;
 176        kernel_high = (target_ureg)kernel_high;
 177
 178        if (size < 0) {
 179            error_report("could not load kernel '%s'", kernel_filename);
 180            exit(1);
 181        }
 182        qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64
 183                      "-0x%08" PRIx64 ", entry at 0x%08" PRIx64
 184                      ", size %" PRIu64 " kB\n",
 185                      kernel_low, kernel_high, kernel_entry, size / KiB);
 186
 187        if (kernel_cmdline) {
 188            cpu[0]->env.gr[24] = 0x4000;
 189            pstrcpy_targphys("cmdline", cpu[0]->env.gr[24],
 190                             TARGET_PAGE_SIZE, kernel_cmdline);
 191        }
 192
 193        if (initrd_filename) {
 194            ram_addr_t initrd_base;
 195            int64_t initrd_size;
 196
 197            initrd_size = get_image_size(initrd_filename);
 198            if (initrd_size < 0) {
 199                error_report("could not load initial ram disk '%s'",
 200                             initrd_filename);
 201                exit(1);
 202            }
 203
 204            /* Load the initrd image high in memory.
 205               Mirror the algorithm used by palo:
 206               (1) Due to sign-extension problems and PDC,
 207               put the initrd no higher than 1G.
 208               (2) Reserve 64k for stack.  */
 209            initrd_base = MIN(ram_size, 1 * GiB);
 210            initrd_base = initrd_base - 64 * KiB;
 211            initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK;
 212
 213            if (initrd_base < kernel_high) {
 214                error_report("kernel and initial ram disk too large!");
 215                exit(1);
 216            }
 217
 218            load_image_targphys(initrd_filename, initrd_base, initrd_size);
 219            cpu[0]->env.gr[23] = initrd_base;
 220            cpu[0]->env.gr[22] = initrd_base + initrd_size;
 221        }
 222    }
 223
 224    if (!kernel_entry) {
 225        /* When booting via firmware, tell firmware if we want interactive
 226         * mode (kernel_entry=1), and to boot from CD (gr[24]='d')
 227         * or hard disc * (gr[24]='c').
 228         */
 229        kernel_entry = boot_menu ? 1 : 0;
 230        cpu[0]->env.gr[24] = machine->boot_order[0];
 231    }
 232
 233    /* We jump to the firmware entry routine and pass the
 234     * various parameters in registers. After firmware initialization,
 235     * firmware will start the Linux kernel with ramdisk and cmdline.
 236     */
 237    cpu[0]->env.gr[26] = ram_size;
 238    cpu[0]->env.gr[25] = kernel_entry;
 239
 240    /* tell firmware how many SMP CPUs to present in inventory table */
 241    cpu[0]->env.gr[21] = smp_cpus;
 242}
 243
 244static void hppa_machine_reset(MachineState *ms)
 245{
 246    unsigned int smp_cpus = ms->smp.cpus;
 247    int i;
 248
 249    qemu_devices_reset();
 250
 251    /* Start all CPUs at the firmware entry point.
 252     *  Monarch CPU will initialize firmware, secondary CPUs
 253     *  will enter a small idle look and wait for rendevouz. */
 254    for (i = 0; i < smp_cpus; i++) {
 255        cpu_set_pc(CPU(cpu[i]), firmware_entry);
 256        cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000;
 257    }
 258
 259    /* already initialized by machine_hppa_init()? */
 260    if (cpu[0]->env.gr[26] == ram_size) {
 261        return;
 262    }
 263
 264    cpu[0]->env.gr[26] = ram_size;
 265    cpu[0]->env.gr[25] = 0; /* no firmware boot menu */
 266    cpu[0]->env.gr[24] = 'c';
 267    /* gr22/gr23 unused, no initrd while reboot. */
 268    cpu[0]->env.gr[21] = smp_cpus;
 269}
 270
 271
 272static void machine_hppa_machine_init(MachineClass *mc)
 273{
 274    mc->desc = "HPPA generic machine";
 275    mc->default_cpu_type = TYPE_HPPA_CPU;
 276    mc->init = machine_hppa_init;
 277    mc->reset = hppa_machine_reset;
 278    mc->block_default_type = IF_SCSI;
 279    mc->max_cpus = HPPA_MAX_CPUS;
 280    mc->default_cpus = 1;
 281    mc->is_default = 1;
 282    mc->default_ram_size = 512 * MiB;
 283    mc->default_boot_order = "cd";
 284}
 285
 286DEFINE_MACHINE("hppa", machine_hppa_machine_init)
 287