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/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 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 cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type)); 82 83 cpu_region = g_new(MemoryRegion, 1); 84 memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops, 85 cpu[i], g_strdup_printf("cpu%ld-io-eir", i), 4); 86 memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000, 87 cpu_region); 88 } 89 90 /* Limit main memory. */ 91 if (ram_size > FIRMWARE_START) { 92 machine->ram_size = ram_size = FIRMWARE_START; 93 } 94 95 /* Main memory region. */ 96 ram_region = g_new(MemoryRegion, 1); 97 memory_region_allocate_system_memory(ram_region, OBJECT(machine), 98 "ram", ram_size); 99 memory_region_add_subregion(addr_space, 0, ram_region); 100 101 /* Init Dino (PCI host bus chip). */ 102 pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq); 103 assert(pci_bus); 104 105 /* Create ISA bus. */ 106 isa_bus = hppa_isa_bus(); 107 assert(isa_bus); 108 109 /* Realtime clock, used by firmware for PDC_TOD call. */ 110 mc146818_rtc_init(isa_bus, 2000, rtc_irq); 111 112 /* Serial code setup. */ 113 if (serial_hd(0)) { 114 uint32_t addr = DINO_UART_HPA + 0x800; 115 serial_mm_init(addr_space, addr, 0, serial_irq, 116 115200, serial_hd(0), DEVICE_BIG_ENDIAN); 117 } 118 119 /* SCSI disk setup. */ 120 dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a")); 121 lsi53c8xx_handle_legacy_cmdline(dev); 122 123 /* Network setup. e1000 is good enough, failing Tulip support. */ 124 for (i = 0; i < nb_nics; i++) { 125 pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL); 126 } 127 128 /* Load firmware. Given that this is not "real" firmware, 129 but one explicitly written for the emulation, we might as 130 well load it directly from an ELF image. */ 131 firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, 132 bios_name ? bios_name : 133 "hppa-firmware.img"); 134 if (firmware_filename == NULL) { 135 error_report("no firmware provided"); 136 exit(1); 137 } 138 139 size = load_elf(firmware_filename, NULL, NULL, NULL, 140 &firmware_entry, &firmware_low, &firmware_high, 141 true, EM_PARISC, 0, 0); 142 143 /* Unfortunately, load_elf sign-extends reading elf32. */ 144 firmware_entry = (target_ureg)firmware_entry; 145 firmware_low = (target_ureg)firmware_low; 146 firmware_high = (target_ureg)firmware_high; 147 148 if (size < 0) { 149 error_report("could not load firmware '%s'", firmware_filename); 150 exit(1); 151 } 152 qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64 153 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n", 154 firmware_low, firmware_high, firmware_entry); 155 if (firmware_low < ram_size || firmware_high >= FIRMWARE_END) { 156 error_report("Firmware overlaps with memory or IO space"); 157 exit(1); 158 } 159 g_free(firmware_filename); 160 161 rom_region = g_new(MemoryRegion, 1); 162 memory_region_allocate_system_memory(rom_region, OBJECT(machine), 163 "firmware", 164 (FIRMWARE_END - FIRMWARE_START)); 165 memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region); 166 167 /* Load kernel */ 168 if (kernel_filename) { 169 size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys, 170 NULL, &kernel_entry, &kernel_low, &kernel_high, 171 true, EM_PARISC, 0, 0); 172 173 /* Unfortunately, load_elf sign-extends reading elf32. */ 174 kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry); 175 kernel_low = (target_ureg)kernel_low; 176 kernel_high = (target_ureg)kernel_high; 177 178 if (size < 0) { 179 error_report("could not load kernel '%s'", kernel_filename); 180 exit(1); 181 } 182 qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64 183 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 184 ", size %" PRIu64 " kB\n", 185 kernel_low, kernel_high, kernel_entry, size / KiB); 186 187 if (kernel_cmdline) { 188 cpu[0]->env.gr[24] = 0x4000; 189 pstrcpy_targphys("cmdline", cpu[0]->env.gr[24], 190 TARGET_PAGE_SIZE, kernel_cmdline); 191 } 192 193 if (initrd_filename) { 194 ram_addr_t initrd_base; 195 int64_t initrd_size; 196 197 initrd_size = get_image_size(initrd_filename); 198 if (initrd_size < 0) { 199 error_report("could not load initial ram disk '%s'", 200 initrd_filename); 201 exit(1); 202 } 203 204 /* Load the initrd image high in memory. 205 Mirror the algorithm used by palo: 206 (1) Due to sign-extension problems and PDC, 207 put the initrd no higher than 1G. 208 (2) Reserve 64k for stack. */ 209 initrd_base = MIN(ram_size, 1 * GiB); 210 initrd_base = initrd_base - 64 * KiB; 211 initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK; 212 213 if (initrd_base < kernel_high) { 214 error_report("kernel and initial ram disk too large!"); 215 exit(1); 216 } 217 218 load_image_targphys(initrd_filename, initrd_base, initrd_size); 219 cpu[0]->env.gr[23] = initrd_base; 220 cpu[0]->env.gr[22] = initrd_base + initrd_size; 221 } 222 } 223 224 if (!kernel_entry) { 225 /* When booting via firmware, tell firmware if we want interactive 226 * mode (kernel_entry=1), and to boot from CD (gr[24]='d') 227 * or hard disc * (gr[24]='c'). 228 */ 229 kernel_entry = boot_menu ? 1 : 0; 230 cpu[0]->env.gr[24] = machine->boot_order[0]; 231 } 232 233 /* We jump to the firmware entry routine and pass the 234 * various parameters in registers. After firmware initialization, 235 * firmware will start the Linux kernel with ramdisk and cmdline. 236 */ 237 cpu[0]->env.gr[26] = ram_size; 238 cpu[0]->env.gr[25] = kernel_entry; 239 240 /* tell firmware how many SMP CPUs to present in inventory table */ 241 cpu[0]->env.gr[21] = smp_cpus; 242 } 243 244 static void hppa_machine_reset(MachineState *ms) 245 { 246 unsigned int smp_cpus = ms->smp.cpus; 247 int i; 248 249 qemu_devices_reset(); 250 251 /* Start all CPUs at the firmware entry point. 252 * Monarch CPU will initialize firmware, secondary CPUs 253 * will enter a small idle look and wait for rendevouz. */ 254 for (i = 0; i < smp_cpus; i++) { 255 cpu_set_pc(CPU(cpu[i]), firmware_entry); 256 cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000; 257 } 258 259 /* already initialized by machine_hppa_init()? */ 260 if (cpu[0]->env.gr[26] == ram_size) { 261 return; 262 } 263 264 cpu[0]->env.gr[26] = ram_size; 265 cpu[0]->env.gr[25] = 0; /* no firmware boot menu */ 266 cpu[0]->env.gr[24] = 'c'; 267 /* gr22/gr23 unused, no initrd while reboot. */ 268 cpu[0]->env.gr[21] = smp_cpus; 269 } 270 271 272 static void machine_hppa_machine_init(MachineClass *mc) 273 { 274 mc->desc = "HPPA generic machine"; 275 mc->default_cpu_type = TYPE_HPPA_CPU; 276 mc->init = machine_hppa_init; 277 mc->reset = hppa_machine_reset; 278 mc->block_default_type = IF_SCSI; 279 mc->max_cpus = HPPA_MAX_CPUS; 280 mc->default_cpus = 1; 281 mc->is_default = 1; 282 mc->default_ram_size = 512 * MiB; 283 mc->default_boot_order = "cd"; 284 } 285 286 DEFINE_MACHINE("hppa", machine_hppa_machine_init) 287