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
  76     ram_size = machine->ram_size;
  77
  78     /* Create CPUs.  */
  79     for (i = 0; i < smp_cpus; i++) {
  80         cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type));
  81
  82         cpu_region = g_new(MemoryRegion, 1);
  83         memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops,
  84                               cpu[i], g_strdup_printf("cpu%ld-io-eir", i), 4);
  85         memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000,
  86                                     cpu_region);
  87     }
  88
  89     /* Limit main memory. */
  90     if (ram_size > FIRMWARE_START) {
  91         machine->ram_size = ram_size = FIRMWARE_START;
  92     }
  93
  94     /* Main memory region. */
  95     ram_region = g_new(MemoryRegion, 1);
  96     memory_region_allocate_system_memory(ram_region, OBJECT(machine),
  97                                          "ram", ram_size);
  98     memory_region_add_subregion(addr_space, 0, ram_region);
  99
 100     /* Init Dino (PCI host bus chip).  */
 101     pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq);
 102     assert(pci_bus);
 103
 104     /* Create ISA bus. */
 105     isa_bus = hppa_isa_bus();
 106     assert(isa_bus);
 107
 108     /* Realtime clock, used by firmware for PDC_TOD call. */
 109     mc146818_rtc_init(isa_bus, 2000, rtc_irq);
 110
 111     /* Serial code setup.  */
 112     if (serial_hd(0)) {
 113         uint32_t addr = DINO_UART_HPA + 0x800;
 114         serial_mm_init(addr_space, addr, 0, serial_irq,
 115                        115200, serial_hd(0), DEVICE_BIG_ENDIAN);
 116     }
 117
 118     /* SCSI disk setup. */
 119     dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
 120     lsi53c8xx_handle_legacy_cmdline(dev);
 121
 122     /* Network setup.  e1000 is good enough, failing Tulip support.  */
 123     for (i = 0; i < nb_nics; i++) {
 124         pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
 125     }
 126
 127     /* Load firmware.  Given that this is not "real" firmware,
 128        but one explicitly written for the emulation, we might as
 129        well load it directly from an ELF image.  */
 130     firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 131                                        bios_name ? bios_name :
 132                                        "hppa-firmware.img");
 133     if (firmware_filename == NULL) {
 134         error_report("no firmware provided");
 135         exit(1);
 136     }
 137
 138     size = load_elf(firmware_filename, NULL, NULL, NULL,
 139                     &firmware_entry, &firmware_low, &firmware_high,
 140                     true, EM_PARISC, 0, 0);
 141
 142     /* Unfortunately, load_elf sign-extends reading elf32.  */
 143     firmware_entry = (target_ureg)firmware_entry;
 144     firmware_low = (target_ureg)firmware_low;
 145     firmware_high = (target_ureg)firmware_high;
 146
 147     if (size < 0) {
 148         error_report("could not load firmware '%s'", firmware_filename);
 149         exit(1);
 150     }
 151     qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64
 152                   "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n",
 153                   firmware_low, firmware_high, firmware_entry);
 154     if (firmware_low < ram_size || firmware_high >= FIRMWARE_END) {
 155         error_report("Firmware overlaps with memory or IO space");
 156         exit(1);
 157     }
 158     g_free(firmware_filename);
 159
 160     rom_region = g_new(MemoryRegion, 1);
 161     memory_region_allocate_system_memory(rom_region, OBJECT(machine),
 162                                          "firmware",
 163                                          (FIRMWARE_END - FIRMWARE_START));
 164     memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);
 165
 166     /* Load kernel */
 167     if (kernel_filename) {
 168         size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys,
 169                         NULL, &kernel_entry, &kernel_low, &kernel_high,
 170                         true, EM_PARISC, 0, 0);
 171
 172         /* Unfortunately, load_elf sign-extends reading elf32.  */
 173         kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry);
 174         kernel_low = (target_ureg)kernel_low;
 175         kernel_high = (target_ureg)kernel_high;
 176
 177         if (size < 0) {
 178             error_report("could not load kernel '%s'", kernel_filename);
 179             exit(1);
 180         }
 181         qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64
 182                       "-0x%08" PRIx64 ", entry at 0x%08" PRIx64
 183                       ", size %" PRIu64 " kB\n",
 184                       kernel_low, kernel_high, kernel_entry, size / KiB);
 185
 186         if (kernel_cmdline) {
 187             cpu[0]->env.gr[24] = 0x4000;
 188             pstrcpy_targphys("cmdline", cpu[0]->env.gr[24],
 189                              TARGET_PAGE_SIZE, kernel_cmdline);
 190         }
 191
 192         if (initrd_filename) {
 193             ram_addr_t initrd_base;
 194             int64_t initrd_size;
 195
 196             initrd_size = get_image_size(initrd_filename);
 197             if (initrd_size < 0) {
 198                 error_report("could not load initial ram disk '%s'",
 199                              initrd_filename);
 200                 exit(1);
 201             }
 202
 203             /* Load the initrd image high in memory.
 204                Mirror the algorithm used by palo:
 205                (1) Due to sign-extension problems and PDC,
 206                put the initrd no higher than 1G.
 207                (2) Reserve 64k for stack.  */
 208             initrd_base = MIN(ram_size, 1 * GiB);
 209             initrd_base = initrd_base - 64 * KiB;
 210             initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK;
 211
 212             if (initrd_base < kernel_high) {
 213                 error_report("kernel and initial ram disk too large!");
 214                 exit(1);
 215             }
 216
 217             load_image_targphys(initrd_filename, initrd_base, initrd_size);
 218             cpu[0]->env.gr[23] = initrd_base;
 219             cpu[0]->env.gr[22] = initrd_base + initrd_size;
 220         }
 221     }
 222
 223     if (!kernel_entry) {
 224         /* When booting via firmware, tell firmware if we want interactive
 225          * mode (kernel_entry=1), and to boot from CD (gr[24]='d')
 226          * or hard disc * (gr[24]='c').
 227          */
 228         kernel_entry = boot_menu ? 1 : 0;
 229         cpu[0]->env.gr[24] = machine->boot_order[0];
 230     }
 231
 232     /* We jump to the firmware entry routine and pass the
 233      * various parameters in registers. After firmware initialization,
 234      * firmware will start the Linux kernel with ramdisk and cmdline.
 235      */
 236     cpu[0]->env.gr[26] = ram_size;
 237     cpu[0]->env.gr[25] = kernel_entry;
 238
 239     /* tell firmware how many SMP CPUs to present in inventory table */
 240     cpu[0]->env.gr[21] = smp_cpus;
 241 }
 242
 243 static void hppa_machine_reset(void)
 244 {
 245     int i;
 246
 247     qemu_devices_reset();
 248
 249     /* Start all CPUs at the firmware entry point.
 250      *  Monarch CPU will initialize firmware, secondary CPUs
 251      *  will enter a small idle look and wait for rendevouz. */
 252     for (i = 0; i < smp_cpus; i++) {
 253         cpu_set_pc(CPU(cpu[i]), firmware_entry);
 254         cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000;
 255     }
 256
 257     /* already initialized by machine_hppa_init()? */
 258     if (cpu[0]->env.gr[26] == ram_size) {
 259         return;
 260     }
 261
 262     cpu[0]->env.gr[26] = ram_size;
 263     cpu[0]->env.gr[25] = 0; /* no firmware boot menu */
 264     cpu[0]->env.gr[24] = 'c';
 265     /* gr22/gr23 unused, no initrd while reboot. */
 266     cpu[0]->env.gr[21] = smp_cpus;
 267 }
 268
 269
 270 static void machine_hppa_machine_init(MachineClass *mc)
 271 {
 272     mc->desc = "HPPA generic machine";
 273     mc->default_cpu_type = TYPE_HPPA_CPU;
 274     mc->init = machine_hppa_init;
 275     mc->reset = hppa_machine_reset;
 276     mc->block_default_type = IF_SCSI;
 277     mc->max_cpus = HPPA_MAX_CPUS;
 278     mc->default_cpus = 1;
 279     mc->is_default = 1;
 280     mc->default_ram_size = 512 * MiB;
 281     mc->default_boot_order = "cd";
 282 }
 283
 284 DEFINE_MACHINE("hppa", machine_hppa_machine_init)