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
  28 static 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
  50 static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr)
  51 {
  52     addr &= (0x10000000 - 1);
  53     return addr;
  54 }
  55
  56 static HPPACPU *cpu[HPPA_MAX_CPUS];
  57 static uint64_t firmware_entry;
  58
  59 static 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
 256 static 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
 284 static 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
 299 DEFINE_MACHINE("hppa", machine_hppa_machine_init)