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