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 "net/net.h"
  23 #include "qemu/log.h"
  24
  25 #define MAX_IDE_BUS 2
  26
  27 static ISABus *hppa_isa_bus(void)
  28 {
  29     ISABus *isa_bus;
  30     qemu_irq *isa_irqs;
  31     MemoryRegion *isa_region;
  32
  33     isa_region = g_new(MemoryRegion, 1);
  34     memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops,
  35                           NULL, "isa-io", 0x800);
  36     memory_region_add_subregion(get_system_memory(), IDE_HPA,
  37                                 isa_region);
  38
  39     isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region,
  40                           &error_abort);
  41     isa_irqs = i8259_init(isa_bus,
  42                           /* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */
  43                           NULL);
  44     isa_bus_irqs(isa_bus, isa_irqs);
  45
  46     return isa_bus;
  47 }
  48
  49 static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr)
  50 {
  51     addr &= (0x10000000 - 1);
  52     return addr;
  53 }
  54
  55 static HPPACPU *cpu[HPPA_MAX_CPUS];
  56 static uint64_t firmware_entry;
  57
  58 static void machine_hppa_init(MachineState *machine)
  59 {
  60     const char *kernel_filename = machine->kernel_filename;
  61     const char *kernel_cmdline = machine->kernel_cmdline;
  62     const char *initrd_filename = machine->initrd_filename;
  63     DeviceState *dev;
  64     PCIBus *pci_bus;
  65     ISABus *isa_bus;
  66     qemu_irq rtc_irq, serial_irq;
  67     char *firmware_filename;
  68     uint64_t firmware_low, firmware_high;
  69     long size;
  70     uint64_t kernel_entry = 0, kernel_low, kernel_high;
  71     MemoryRegion *addr_space = get_system_memory();
  72     MemoryRegion *rom_region;
  73     MemoryRegion *ram_region;
  74     MemoryRegion *cpu_region;
  75     long i;
  76     unsigned int smp_cpus = machine->smp.cpus;
  77
  78     ram_size = machine->ram_size;
  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     /* Limit main memory. */
  94     if (ram_size > FIRMWARE_START) {
  95         machine->ram_size = ram_size = FIRMWARE_START;
  96     }
  97
  98     /* Main memory region. */
  99     ram_region = g_new(MemoryRegion, 1);
 100     memory_region_allocate_system_memory(ram_region, OBJECT(machine),
 101                                          "ram", ram_size);
 102     memory_region_add_subregion(addr_space, 0, ram_region);
 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     /* Network setup.  e1000 is good enough, failing Tulip support.  */
 127     for (i = 0; i < nb_nics; i++) {
 128         pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
 129     }
 130
 131     /* Load firmware.  Given that this is not "real" firmware,
 132        but one explicitly written for the emulation, we might as
 133        well load it directly from an ELF image.  */
 134     firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 135                                        bios_name ? bios_name :
 136                                        "hppa-firmware.img");
 137     if (firmware_filename == NULL) {
 138         error_report("no firmware provided");
 139         exit(1);
 140     }
 141
 142     size = load_elf(firmware_filename, NULL, NULL, NULL,
 143                     &firmware_entry, &firmware_low, &firmware_high,
 144                     true, EM_PARISC, 0, 0);
 145
 146     /* Unfortunately, load_elf sign-extends reading elf32.  */
 147     firmware_entry = (target_ureg)firmware_entry;
 148     firmware_low = (target_ureg)firmware_low;
 149     firmware_high = (target_ureg)firmware_high;
 150
 151     if (size < 0) {
 152         error_report("could not load firmware '%s'", firmware_filename);
 153         exit(1);
 154     }
 155     qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64
 156                   "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n",
 157                   firmware_low, firmware_high, firmware_entry);
 158     if (firmware_low < ram_size || firmware_high >= FIRMWARE_END) {
 159         error_report("Firmware overlaps with memory or IO space");
 160         exit(1);
 161     }
 162     g_free(firmware_filename);
 163
 164     rom_region = g_new(MemoryRegion, 1);
 165     memory_region_init_ram(rom_region, NULL, "firmware",
 166                            (FIRMWARE_END - FIRMWARE_START), &error_fatal);
 167     memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);
 168
 169     /* Load kernel */
 170     if (kernel_filename) {
 171         size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys,
 172                         NULL, &kernel_entry, &kernel_low, &kernel_high,
 173                         true, EM_PARISC, 0, 0);
 174
 175         /* Unfortunately, load_elf sign-extends reading elf32.  */
 176         kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry);
 177         kernel_low = (target_ureg)kernel_low;
 178         kernel_high = (target_ureg)kernel_high;
 179
 180         if (size < 0) {
 181             error_report("could not load kernel '%s'", kernel_filename);
 182             exit(1);
 183         }
 184         qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64
 185                       "-0x%08" PRIx64 ", entry at 0x%08" PRIx64
 186                       ", size %" PRIu64 " kB\n",
 187                       kernel_low, kernel_high, kernel_entry, size / KiB);
 188
 189         if (kernel_cmdline) {
 190             cpu[0]->env.gr[24] = 0x4000;
 191             pstrcpy_targphys("cmdline", cpu[0]->env.gr[24],
 192                              TARGET_PAGE_SIZE, kernel_cmdline);
 193         }
 194
 195         if (initrd_filename) {
 196             ram_addr_t initrd_base;
 197             int64_t initrd_size;
 198
 199             initrd_size = get_image_size(initrd_filename);
 200             if (initrd_size < 0) {
 201                 error_report("could not load initial ram disk '%s'",
 202                              initrd_filename);
 203                 exit(1);
 204             }
 205
 206             /* Load the initrd image high in memory.
 207                Mirror the algorithm used by palo:
 208                (1) Due to sign-extension problems and PDC,
 209                put the initrd no higher than 1G.
 210                (2) Reserve 64k for stack.  */
 211             initrd_base = MIN(ram_size, 1 * GiB);
 212             initrd_base = initrd_base - 64 * KiB;
 213             initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK;
 214
 215             if (initrd_base < kernel_high) {
 216                 error_report("kernel and initial ram disk too large!");
 217                 exit(1);
 218             }
 219
 220             load_image_targphys(initrd_filename, initrd_base, initrd_size);
 221             cpu[0]->env.gr[23] = initrd_base;
 222             cpu[0]->env.gr[22] = initrd_base + initrd_size;
 223         }
 224     }
 225
 226     if (!kernel_entry) {
 227         /* When booting via firmware, tell firmware if we want interactive
 228          * mode (kernel_entry=1), and to boot from CD (gr[24]='d')
 229          * or hard disc * (gr[24]='c').
 230          */
 231         kernel_entry = boot_menu ? 1 : 0;
 232         cpu[0]->env.gr[24] = machine->boot_order[0];
 233     }
 234
 235     /* We jump to the firmware entry routine and pass the
 236      * various parameters in registers. After firmware initialization,
 237      * firmware will start the Linux kernel with ramdisk and cmdline.
 238      */
 239     cpu[0]->env.gr[26] = ram_size;
 240     cpu[0]->env.gr[25] = kernel_entry;
 241
 242     /* tell firmware how many SMP CPUs to present in inventory table */
 243     cpu[0]->env.gr[21] = smp_cpus;
 244 }
 245
 246 static void hppa_machine_reset(MachineState *ms)
 247 {
 248     unsigned int smp_cpus = ms->smp.cpus;
 249     int i;
 250
 251     qemu_devices_reset();
 252
 253     /* Start all CPUs at the firmware entry point.
 254      *  Monarch CPU will initialize firmware, secondary CPUs
 255      *  will enter a small idle look and wait for rendevouz. */
 256     for (i = 0; i < smp_cpus; i++) {
 257         cpu_set_pc(CPU(cpu[i]), firmware_entry);
 258         cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000;
 259     }
 260
 261     /* already initialized by machine_hppa_init()? */
 262     if (cpu[0]->env.gr[26] == ram_size) {
 263         return;
 264     }
 265
 266     cpu[0]->env.gr[26] = ram_size;
 267     cpu[0]->env.gr[25] = 0; /* no firmware boot menu */
 268     cpu[0]->env.gr[24] = 'c';
 269     /* gr22/gr23 unused, no initrd while reboot. */
 270     cpu[0]->env.gr[21] = smp_cpus;
 271 }
 272
 273
 274 static void machine_hppa_machine_init(MachineClass *mc)
 275 {
 276     mc->desc = "HPPA generic machine";
 277     mc->default_cpu_type = TYPE_HPPA_CPU;
 278     mc->init = machine_hppa_init;
 279     mc->reset = hppa_machine_reset;
 280     mc->block_default_type = IF_SCSI;
 281     mc->max_cpus = HPPA_MAX_CPUS;
 282     mc->default_cpus = 1;
 283     mc->is_default = 1;
 284     mc->default_ram_size = 512 * MiB;
 285     mc->default_boot_order = "cd";
 286 }
 287
 288 DEFINE_MACHINE("hppa", machine_hppa_machine_init)