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
  26 static 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
  48 static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr)
  49 {
  50     addr &= (0x10000000 - 1);
  51     return addr;
  52 }
  53
  54 static HPPACPU *cpu[HPPA_MAX_CPUS];
  55 static uint64_t firmware_entry;
  56
  57 static 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
 244 static 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
 272 static 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
 286 DEFINE_MACHINE("hppa", machine_hppa_machine_init)