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