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 "qemu/datadir.h" 9 #include "cpu.h" 10 #include "elf.h" 11 #include "hw/loader.h" 12 #include "qemu/error-report.h" 13 #include "sysemu/reset.h" 14 #include "sysemu/sysemu.h" 15 #include "sysemu/runstate.h" 16 #include "hw/rtc/mc146818rtc.h" 17 #include "hw/timer/i8254.h" 18 #include "hw/char/serial.h" 19 #include "hw/net/lasi_82596.h" 20 #include "hppa_sys.h" 21 #include "qemu/units.h" 22 #include "qapi/error.h" 23 #include "net/net.h" 24 #include "qemu/log.h" 25 #include "net/net.h" 26 27 #define MAX_IDE_BUS 2 28 29 #define MIN_SEABIOS_HPPA_VERSION 1 /* require at least this fw version */ 30 31 #define HPA_POWER_BUTTON (FIRMWARE_END - 0x10) 32 33 static void hppa_powerdown_req(Notifier *n, void *opaque) 34 { 35 hwaddr soft_power_reg = HPA_POWER_BUTTON; 36 uint32_t val; 37 38 val = ldl_be_phys(&address_space_memory, soft_power_reg); 39 if ((val >> 8) == 0) { 40 /* immediately shut down when under hardware control */ 41 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); 42 return; 43 } 44 45 /* clear bit 31 to indicate that the power switch was pressed. */ 46 val &= ~1; 47 stl_be_phys(&address_space_memory, soft_power_reg, val); 48 } 49 50 static Notifier hppa_system_powerdown_notifier = { 51 .notify = hppa_powerdown_req 52 }; 53 54 55 static ISABus *hppa_isa_bus(void) 56 { 57 ISABus *isa_bus; 58 qemu_irq *isa_irqs; 59 MemoryRegion *isa_region; 60 61 isa_region = g_new(MemoryRegion, 1); 62 memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops, 63 NULL, "isa-io", 0x800); 64 memory_region_add_subregion(get_system_memory(), IDE_HPA, 65 isa_region); 66 67 isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region, 68 &error_abort); 69 isa_irqs = i8259_init(isa_bus, 70 /* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */ 71 NULL); 72 isa_bus_irqs(isa_bus, isa_irqs); 73 74 return isa_bus; 75 } 76 77 static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr) 78 { 79 addr &= (0x10000000 - 1); 80 return addr; 81 } 82 83 static HPPACPU *cpu[HPPA_MAX_CPUS]; 84 static uint64_t firmware_entry; 85 86 static void fw_cfg_boot_set(void *opaque, const char *boot_device, 87 Error **errp) 88 { 89 fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]); 90 } 91 92 static FWCfgState *create_fw_cfg(MachineState *ms) 93 { 94 FWCfgState *fw_cfg; 95 uint64_t val; 96 97 fw_cfg = fw_cfg_init_mem(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4); 98 fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, ms->smp.cpus); 99 fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, HPPA_MAX_CPUS); 100 fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, ms->ram_size); 101 102 val = cpu_to_le64(MIN_SEABIOS_HPPA_VERSION); 103 fw_cfg_add_file(fw_cfg, "/etc/firmware-min-version", 104 g_memdup(&val, sizeof(val)), sizeof(val)); 105 106 val = cpu_to_le64(HPPA_TLB_ENTRIES); 107 fw_cfg_add_file(fw_cfg, "/etc/cpu/tlb_entries", 108 g_memdup(&val, sizeof(val)), sizeof(val)); 109 110 val = cpu_to_le64(HPPA_BTLB_ENTRIES); 111 fw_cfg_add_file(fw_cfg, "/etc/cpu/btlb_entries", 112 g_memdup(&val, sizeof(val)), sizeof(val)); 113 114 val = cpu_to_le64(HPA_POWER_BUTTON); 115 fw_cfg_add_file(fw_cfg, "/etc/power-button-addr", 116 g_memdup(&val, sizeof(val)), sizeof(val)); 117 118 fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, ms->boot_order[0]); 119 qemu_register_boot_set(fw_cfg_boot_set, fw_cfg); 120 121 return fw_cfg; 122 } 123 124 static void machine_hppa_init(MachineState *machine) 125 { 126 const char *kernel_filename = machine->kernel_filename; 127 const char *kernel_cmdline = machine->kernel_cmdline; 128 const char *initrd_filename = machine->initrd_filename; 129 DeviceState *dev; 130 PCIBus *pci_bus; 131 ISABus *isa_bus; 132 qemu_irq rtc_irq, serial_irq; 133 char *firmware_filename; 134 uint64_t firmware_low, firmware_high; 135 long size; 136 uint64_t kernel_entry = 0, kernel_low, kernel_high; 137 MemoryRegion *addr_space = get_system_memory(); 138 MemoryRegion *rom_region; 139 MemoryRegion *cpu_region; 140 long i; 141 unsigned int smp_cpus = machine->smp.cpus; 142 SysBusDevice *s; 143 144 /* Create CPUs. */ 145 for (i = 0; i < smp_cpus; i++) { 146 char *name = g_strdup_printf("cpu%ld-io-eir", i); 147 cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type)); 148 149 cpu_region = g_new(MemoryRegion, 1); 150 memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops, 151 cpu[i], name, 4); 152 memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000, 153 cpu_region); 154 g_free(name); 155 } 156 157 /* Main memory region. */ 158 if (machine->ram_size > 3 * GiB) { 159 error_report("RAM size is currently restricted to 3GB"); 160 exit(EXIT_FAILURE); 161 } 162 memory_region_add_subregion_overlap(addr_space, 0, machine->ram, -1); 163 164 165 /* Init Lasi chip */ 166 lasi_init(addr_space); 167 168 /* Init Dino (PCI host bus chip). */ 169 pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq); 170 assert(pci_bus); 171 172 /* Create ISA bus. */ 173 isa_bus = hppa_isa_bus(); 174 assert(isa_bus); 175 176 /* Realtime clock, used by firmware for PDC_TOD call. */ 177 mc146818_rtc_init(isa_bus, 2000, rtc_irq); 178 179 /* Serial code setup. */ 180 if (serial_hd(0)) { 181 uint32_t addr = DINO_UART_HPA + 0x800; 182 serial_mm_init(addr_space, addr, 0, serial_irq, 183 115200, serial_hd(0), DEVICE_BIG_ENDIAN); 184 } 185 186 /* fw_cfg configuration interface */ 187 create_fw_cfg(machine); 188 189 /* SCSI disk setup. */ 190 dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a")); 191 lsi53c8xx_handle_legacy_cmdline(dev); 192 193 /* Graphics setup. */ 194 if (machine->enable_graphics && vga_interface_type != VGA_NONE) { 195 dev = qdev_new("artist"); 196 s = SYS_BUS_DEVICE(dev); 197 sysbus_realize_and_unref(s, &error_fatal); 198 sysbus_mmio_map(s, 0, LASI_GFX_HPA); 199 sysbus_mmio_map(s, 1, ARTIST_FB_ADDR); 200 } 201 202 /* Network setup. */ 203 for (i = 0; i < nb_nics; i++) { 204 if (!enable_lasi_lan()) { 205 pci_nic_init_nofail(&nd_table[i], pci_bus, "tulip", NULL); 206 } 207 } 208 209 /* register power switch emulation */ 210 qemu_register_powerdown_notifier(&hppa_system_powerdown_notifier); 211 212 /* Load firmware. Given that this is not "real" firmware, 213 but one explicitly written for the emulation, we might as 214 well load it directly from an ELF image. */ 215 firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, 216 machine->firmware ?: "hppa-firmware.img"); 217 if (firmware_filename == NULL) { 218 error_report("no firmware provided"); 219 exit(1); 220 } 221 222 size = load_elf(firmware_filename, NULL, NULL, NULL, 223 &firmware_entry, &firmware_low, &firmware_high, NULL, 224 true, EM_PARISC, 0, 0); 225 226 /* Unfortunately, load_elf sign-extends reading elf32. */ 227 firmware_entry = (target_ureg)firmware_entry; 228 firmware_low = (target_ureg)firmware_low; 229 firmware_high = (target_ureg)firmware_high; 230 231 if (size < 0) { 232 error_report("could not load firmware '%s'", firmware_filename); 233 exit(1); 234 } 235 qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64 236 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n", 237 firmware_low, firmware_high, firmware_entry); 238 if (firmware_low < FIRMWARE_START || firmware_high >= FIRMWARE_END) { 239 error_report("Firmware overlaps with memory or IO space"); 240 exit(1); 241 } 242 g_free(firmware_filename); 243 244 rom_region = g_new(MemoryRegion, 1); 245 memory_region_init_ram(rom_region, NULL, "firmware", 246 (FIRMWARE_END - FIRMWARE_START), &error_fatal); 247 memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region); 248 249 /* Load kernel */ 250 if (kernel_filename) { 251 size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys, 252 NULL, &kernel_entry, &kernel_low, &kernel_high, NULL, 253 true, EM_PARISC, 0, 0); 254 255 /* Unfortunately, load_elf sign-extends reading elf32. */ 256 kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry); 257 kernel_low = (target_ureg)kernel_low; 258 kernel_high = (target_ureg)kernel_high; 259 260 if (size < 0) { 261 error_report("could not load kernel '%s'", kernel_filename); 262 exit(1); 263 } 264 qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64 265 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 266 ", size %" PRIu64 " kB\n", 267 kernel_low, kernel_high, kernel_entry, size / KiB); 268 269 if (kernel_cmdline) { 270 cpu[0]->env.gr[24] = 0x4000; 271 pstrcpy_targphys("cmdline", cpu[0]->env.gr[24], 272 TARGET_PAGE_SIZE, kernel_cmdline); 273 } 274 275 if (initrd_filename) { 276 ram_addr_t initrd_base; 277 int64_t initrd_size; 278 279 initrd_size = get_image_size(initrd_filename); 280 if (initrd_size < 0) { 281 error_report("could not load initial ram disk '%s'", 282 initrd_filename); 283 exit(1); 284 } 285 286 /* Load the initrd image high in memory. 287 Mirror the algorithm used by palo: 288 (1) Due to sign-extension problems and PDC, 289 put the initrd no higher than 1G. 290 (2) Reserve 64k for stack. */ 291 initrd_base = MIN(machine->ram_size, 1 * GiB); 292 initrd_base = initrd_base - 64 * KiB; 293 initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK; 294 295 if (initrd_base < kernel_high) { 296 error_report("kernel and initial ram disk too large!"); 297 exit(1); 298 } 299 300 load_image_targphys(initrd_filename, initrd_base, initrd_size); 301 cpu[0]->env.gr[23] = initrd_base; 302 cpu[0]->env.gr[22] = initrd_base + initrd_size; 303 } 304 } 305 306 if (!kernel_entry) { 307 /* When booting via firmware, tell firmware if we want interactive 308 * mode (kernel_entry=1), and to boot from CD (gr[24]='d') 309 * or hard disc * (gr[24]='c'). 310 */ 311 kernel_entry = boot_menu ? 1 : 0; 312 cpu[0]->env.gr[24] = machine->boot_order[0]; 313 } 314 315 /* We jump to the firmware entry routine and pass the 316 * various parameters in registers. After firmware initialization, 317 * firmware will start the Linux kernel with ramdisk and cmdline. 318 */ 319 cpu[0]->env.gr[26] = machine->ram_size; 320 cpu[0]->env.gr[25] = kernel_entry; 321 322 /* tell firmware how many SMP CPUs to present in inventory table */ 323 cpu[0]->env.gr[21] = smp_cpus; 324 325 /* tell firmware fw_cfg port */ 326 cpu[0]->env.gr[19] = FW_CFG_IO_BASE; 327 } 328 329 static void hppa_machine_reset(MachineState *ms) 330 { 331 unsigned int smp_cpus = ms->smp.cpus; 332 int i; 333 334 qemu_devices_reset(); 335 336 /* Start all CPUs at the firmware entry point. 337 * Monarch CPU will initialize firmware, secondary CPUs 338 * will enter a small idle look and wait for rendevouz. */ 339 for (i = 0; i < smp_cpus; i++) { 340 cpu_set_pc(CPU(cpu[i]), firmware_entry); 341 cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000; 342 } 343 344 /* already initialized by machine_hppa_init()? */ 345 if (cpu[0]->env.gr[26] == ms->ram_size) { 346 return; 347 } 348 349 cpu[0]->env.gr[26] = ms->ram_size; 350 cpu[0]->env.gr[25] = 0; /* no firmware boot menu */ 351 cpu[0]->env.gr[24] = 'c'; 352 /* gr22/gr23 unused, no initrd while reboot. */ 353 cpu[0]->env.gr[21] = smp_cpus; 354 /* tell firmware fw_cfg port */ 355 cpu[0]->env.gr[19] = FW_CFG_IO_BASE; 356 } 357 358 359 static void machine_hppa_machine_init(MachineClass *mc) 360 { 361 mc->desc = "HPPA generic machine"; 362 mc->default_cpu_type = TYPE_HPPA_CPU; 363 mc->init = machine_hppa_init; 364 mc->reset = hppa_machine_reset; 365 mc->block_default_type = IF_SCSI; 366 mc->max_cpus = HPPA_MAX_CPUS; 367 mc->default_cpus = 1; 368 mc->is_default = true; 369 mc->default_ram_size = 512 * MiB; 370 mc->default_boot_order = "cd"; 371 mc->default_ram_id = "ram"; 372 } 373 374 DEFINE_MACHINE("hppa", machine_hppa_machine_init) 375