hw/alpha/dp264.c

   1 /*
   2  * QEMU Alpha DP264/CLIPPER hardware system emulator.
   3  *
   4  * Choose CLIPPER IRQ mappings over, say, DP264, MONET, or WEBBRICK
   5  * variants because CLIPPER doesn't have an SMC669 SuperIO controller
   6  * that we need to emulate as well.
   7  */
   8
   9 #include "qemu/osdep.h"
  10 #include "qemu-common.h"
  11 #include "cpu.h"
  12 #include "elf.h"
  13 #include "hw/loader.h"
  14 #include "alpha_sys.h"
  15 #include "qemu/error-report.h"
  16 #include "sysemu/sysemu.h"
  17 #include "hw/rtc/mc146818rtc.h"
  18 #include "hw/ide/pci.h"
  19 #include "hw/timer/i8254.h"
  20 #include "hw/isa/superio.h"
  21 #include "hw/dma/i8257.h"
  22 #include "net/net.h"
  23 #include "qemu/cutils.h"
  24 #include "qemu/datadir.h"
  25 #include "net/net.h"
  26
  27 #define MAX_IDE_BUS 2
  28
  29 static uint64_t cpu_alpha_superpage_to_phys(void *opaque, uint64_t addr)
  30 {
  31     if (((addr >> 41) & 3) == 2) {
  32         addr &= 0xffffffffffull;
  33     }
  34     return addr;
  35 }
  36
  37 /* Note that there are at least 3 viewpoints of IRQ numbers on Alpha systems.
  38     (0) The dev_irq_n lines into the cpu, which we totally ignore,
  39     (1) The DRIR lines in the typhoon chipset,
  40     (2) The "vector" aka mangled interrupt number reported by SRM PALcode,
  41     (3) The interrupt number assigned by the kernel.
  42    The following function is concerned with (1) only.  */
  43
  44 static int clipper_pci_map_irq(PCIDevice *d, int irq_num)
  45 {
  46     int slot = d->devfn >> 3;
  47
  48     assert(irq_num >= 0 && irq_num <= 3);
  49
  50     return (slot + 1) * 4 + irq_num;
  51 }
  52
  53 static void clipper_init(MachineState *machine)
  54 {
  55     ram_addr_t ram_size = machine->ram_size;
  56     const char *kernel_filename = machine->kernel_filename;
  57     const char *kernel_cmdline = machine->kernel_cmdline;
  58     const char *initrd_filename = machine->initrd_filename;
  59     AlphaCPU *cpus[4];
  60     PCIBus *pci_bus;
  61     PCIDevice *pci_dev;
  62     ISABus *isa_bus;
  63     qemu_irq rtc_irq;
  64     long size, i;
  65     char *palcode_filename;
  66     uint64_t palcode_entry;
  67     uint64_t kernel_entry, kernel_low;
  68     unsigned int smp_cpus = machine->smp.cpus;
  69
  70     /* Create up to 4 cpus.  */
  71     memset(cpus, 0, sizeof(cpus));
  72     for (i = 0; i < smp_cpus; ++i) {
  73         cpus[i] = ALPHA_CPU(cpu_create(machine->cpu_type));
  74     }
  75
  76     cpus[0]->env.trap_arg0 = ram_size;
  77     cpus[0]->env.trap_arg1 = 0;
  78     cpus[0]->env.trap_arg2 = smp_cpus;
  79
  80     /* Init the chipset.  */
  81     pci_bus = typhoon_init(machine->ram, &isa_bus, &rtc_irq, cpus,
  82                            clipper_pci_map_irq);
  83
  84     /* Since we have an SRM-compatible PALcode, use the SRM epoch.  */
  85     mc146818_rtc_init(isa_bus, 1900, rtc_irq);
  86
  87     i8254_pit_init(isa_bus, 0x40, 0, NULL);
  88
  89     /* VGA setup.  Don't bother loading the bios.  */
  90     pci_vga_init(pci_bus);
  91
  92     /* Network setup.  e1000 is good enough, failing Tulip support.  */
  93     for (i = 0; i < nb_nics; i++) {
  94         pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
  95     }
  96
  97     /* 2 82C37 (dma) */
  98     isa_create_simple(isa_bus, "i82374");
  99
 100     /* Super I/O */
 101     isa_create_simple(isa_bus, TYPE_SMC37C669_SUPERIO);
 102
 103     /* IDE disk setup.  */
 104     pci_dev = pci_create_simple(pci_bus, -1, "cmd646-ide");
 105     pci_ide_create_devs(pci_dev);
 106
 107     /* Load PALcode.  Given that this is not "real" cpu palcode,
 108        but one explicitly written for the emulation, we might as
 109        well load it directly from and ELF image.  */
 110     palcode_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 111                                       machine->firmware ?: "palcode-clipper");
 112     if (palcode_filename == NULL) {
 113         error_report("no palcode provided");
 114         exit(1);
 115     }
 116     size = load_elf(palcode_filename, NULL, cpu_alpha_superpage_to_phys,
 117                     NULL, &palcode_entry, NULL, NULL, NULL,
 118                     0, EM_ALPHA, 0, 0);
 119     if (size < 0) {
 120         error_report("could not load palcode '%s'", palcode_filename);
 121         exit(1);
 122     }
 123     g_free(palcode_filename);
 124
 125     /* Start all cpus at the PALcode RESET entry point.  */
 126     for (i = 0; i < smp_cpus; ++i) {
 127         cpus[i]->env.pc = palcode_entry;
 128         cpus[i]->env.palbr = palcode_entry;
 129     }
 130
 131     /* Load a kernel.  */
 132     if (kernel_filename) {
 133         uint64_t param_offset;
 134
 135         size = load_elf(kernel_filename, NULL, cpu_alpha_superpage_to_phys,
 136                         NULL, &kernel_entry, &kernel_low, NULL, NULL,
 137                         0, EM_ALPHA, 0, 0);
 138         if (size < 0) {
 139             error_report("could not load kernel '%s'", kernel_filename);
 140             exit(1);
 141         }
 142
 143         cpus[0]->env.trap_arg1 = kernel_entry;
 144
 145         param_offset = kernel_low - 0x6000;
 146
 147         if (kernel_cmdline) {
 148             pstrcpy_targphys("cmdline", param_offset, 0x100, kernel_cmdline);
 149         }
 150
 151         if (initrd_filename) {
 152             long initrd_base;
 153             int64_t initrd_size;
 154
 155             initrd_size = get_image_size(initrd_filename);
 156             if (initrd_size < 0) {
 157                 error_report("could not load initial ram disk '%s'",
 158                              initrd_filename);
 159                 exit(1);
 160             }
 161
 162             /* Put the initrd image as high in memory as possible.  */
 163             initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK;
 164             load_image_targphys(initrd_filename, initrd_base,
 165                                 ram_size - initrd_base);
 166
 167             address_space_stq(&address_space_memory, param_offset + 0x100,
 168                               initrd_base + 0xfffffc0000000000ULL,
 169                               MEMTXATTRS_UNSPECIFIED,
 170                               NULL);
 171             address_space_stq(&address_space_memory, param_offset + 0x108,
 172                               initrd_size, MEMTXATTRS_UNSPECIFIED, NULL);
 173         }
 174     }
 175 }
 176
 177 static void clipper_machine_init(MachineClass *mc)
 178 {
 179     mc->desc = "Alpha DP264/CLIPPER";
 180     mc->init = clipper_init;
 181     mc->block_default_type = IF_IDE;
 182     mc->max_cpus = 4;
 183     mc->is_default = true;
 184     mc->default_cpu_type = ALPHA_CPU_TYPE_NAME("ev67");
 185     mc->default_ram_id = "ram";
 186 }
 187
 188 DEFINE_MACHINE("clipper", clipper_machine_init)