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 "hw/hw.h" 10 #include "elf.h" 11 #include "hw/loader.h" 12 #include "hw/boards.h" 13 #include "alpha_sys.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 20 #define MAX_IDE_BUS 2 21 22 static uint64_t cpu_alpha_superpage_to_phys(void *opaque, uint64_t addr) 23 { 24 if (((addr >> 41) & 3) == 2) { 25 addr &= 0xffffffffffull; 26 } 27 return addr; 28 } 29 30 /* Note that there are at least 3 viewpoints of IRQ numbers on Alpha systems. 31 (0) The dev_irq_n lines into the cpu, which we totally ignore, 32 (1) The DRIR lines in the typhoon chipset, 33 (2) The "vector" aka mangled interrupt number reported by SRM PALcode, 34 (3) The interrupt number assigned by the kernel. 35 The following function is concerned with (1) only. */ 36 37 static int clipper_pci_map_irq(PCIDevice *d, int irq_num) 38 { 39 int slot = d->devfn >> 3; 40 41 assert(irq_num >= 0 && irq_num <= 3); 42 43 return (slot + 1) * 4 + irq_num; 44 } 45 46 static void clipper_init(QEMUMachineInitArgs *args) 47 { 48 ram_addr_t ram_size = args->ram_size; 49 const char *cpu_model = args->cpu_model; 50 const char *kernel_filename = args->kernel_filename; 51 const char *kernel_cmdline = args->kernel_cmdline; 52 const char *initrd_filename = args->initrd_filename; 53 AlphaCPU *cpus[4]; 54 PCIBus *pci_bus; 55 ISABus *isa_bus; 56 qemu_irq rtc_irq; 57 long size, i; 58 const char *palcode_filename; 59 uint64_t palcode_entry, palcode_low, palcode_high; 60 uint64_t kernel_entry, kernel_low, kernel_high; 61 62 /* Create up to 4 cpus. */ 63 memset(cpus, 0, sizeof(cpus)); 64 for (i = 0; i < smp_cpus; ++i) { 65 cpus[i] = cpu_alpha_init(cpu_model ? cpu_model : "ev67"); 66 } 67 68 cpus[0]->env.trap_arg0 = ram_size; 69 cpus[0]->env.trap_arg1 = 0; 70 cpus[0]->env.trap_arg2 = smp_cpus; 71 72 /* Init the chipset. */ 73 pci_bus = typhoon_init(ram_size, &isa_bus, &rtc_irq, cpus, 74 clipper_pci_map_irq); 75 76 rtc_init(isa_bus, 1980, rtc_irq); 77 pit_init(isa_bus, 0x40, 0, NULL); 78 isa_create_simple(isa_bus, "i8042"); 79 80 /* VGA setup. Don't bother loading the bios. */ 81 pci_vga_init(pci_bus); 82 83 /* Serial code setup. */ 84 for (i = 0; i < MAX_SERIAL_PORTS; ++i) { 85 if (serial_hds[i]) { 86 serial_isa_init(isa_bus, i, serial_hds[i]); 87 } 88 } 89 90 /* Network setup. e1000 is good enough, failing Tulip support. */ 91 for (i = 0; i < nb_nics; i++) { 92 pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL); 93 } 94 95 /* IDE disk setup. */ 96 { 97 DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS]; 98 ide_drive_get(hd, MAX_IDE_BUS); 99 100 pci_cmd646_ide_init(pci_bus, hd, 0); 101 } 102 103 /* Load PALcode. Given that this is not "real" cpu palcode, 104 but one explicitly written for the emulation, we might as 105 well load it directly from and ELF image. */ 106 palcode_filename = (bios_name ? bios_name : "palcode-clipper"); 107 palcode_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, palcode_filename); 108 if (palcode_filename == NULL) { 109 hw_error("no palcode provided\n"); 110 exit(1); 111 } 112 size = load_elf(palcode_filename, cpu_alpha_superpage_to_phys, 113 NULL, &palcode_entry, &palcode_low, &palcode_high, 114 0, EM_ALPHA, 0); 115 if (size < 0) { 116 hw_error("could not load palcode '%s'\n", palcode_filename); 117 exit(1); 118 } 119 120 /* Start all cpus at the PALcode RESET entry point. */ 121 for (i = 0; i < smp_cpus; ++i) { 122 cpus[i]->env.pal_mode = 1; 123 cpus[i]->env.pc = palcode_entry; 124 cpus[i]->env.palbr = palcode_entry; 125 } 126 127 /* Load a kernel. */ 128 if (kernel_filename) { 129 uint64_t param_offset; 130 131 size = load_elf(kernel_filename, cpu_alpha_superpage_to_phys, 132 NULL, &kernel_entry, &kernel_low, &kernel_high, 133 0, EM_ALPHA, 0); 134 if (size < 0) { 135 hw_error("could not load kernel '%s'\n", kernel_filename); 136 exit(1); 137 } 138 139 cpus[0]->env.trap_arg1 = kernel_entry; 140 141 param_offset = kernel_low - 0x6000; 142 143 if (kernel_cmdline) { 144 pstrcpy_targphys("cmdline", param_offset, 0x100, kernel_cmdline); 145 } 146 147 if (initrd_filename) { 148 long initrd_base, initrd_size; 149 150 initrd_size = get_image_size(initrd_filename); 151 if (initrd_size < 0) { 152 hw_error("could not load initial ram disk '%s'\n", 153 initrd_filename); 154 exit(1); 155 } 156 157 /* Put the initrd image as high in memory as possible. */ 158 initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK; 159 load_image_targphys(initrd_filename, initrd_base, 160 ram_size - initrd_base); 161 162 stq_phys(param_offset + 0x100, initrd_base + 0xfffffc0000000000ULL); 163 stq_phys(param_offset + 0x108, initrd_size); 164 } 165 } 166 } 167 168 static QEMUMachine clipper_machine = { 169 .name = "clipper", 170 .desc = "Alpha DP264/CLIPPER", 171 .init = clipper_init, 172 .max_cpus = 4, 173 .is_default = 1, 174 DEFAULT_MACHINE_OPTIONS, 175 }; 176 177 static void clipper_machine_init(void) 178 { 179 qemu_register_machine(&clipper_machine); 180 } 181 182 machine_init(clipper_machine_init); 183