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 "hw/boards.h" 13 #include "qemu/error-report.h" 14 #include "sysemu/reset.h" 15 #include "sysemu/sysemu.h" 16 #include "sysemu/runstate.h" 17 #include "hw/rtc/mc146818rtc.h" 18 #include "hw/timer/i8254.h" 19 #include "hw/char/serial.h" 20 #include "hw/net/lasi_82596.h" 21 #include "hppa_sys.h" 22 #include "qemu/units.h" 23 #include "qapi/error.h" 24 #include "net/net.h" 25 #include "qemu/log.h" 26 #include "net/net.h" 27 28 #define MAX_IDE_BUS 2 29 30 #define MIN_SEABIOS_HPPA_VERSION 1 /* require at least this fw version */ 31 32 #define HPA_POWER_BUTTON (FIRMWARE_END - 0x10) 33 34 static void hppa_powerdown_req(Notifier *n, void *opaque) 35 { 36 hwaddr soft_power_reg = HPA_POWER_BUTTON; 37 uint32_t val; 38 39 val = ldl_be_phys(&address_space_memory, soft_power_reg); 40 if ((val >> 8) == 0) { 41 /* immediately shut down when under hardware control */ 42 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); 43 return; 44 } 45 46 /* clear bit 31 to indicate that the power switch was pressed. */ 47 val &= ~1; 48 stl_be_phys(&address_space_memory, soft_power_reg, val); 49 } 50 51 static Notifier hppa_system_powerdown_notifier = { 52 .notify = hppa_powerdown_req 53 }; 54 55 56 static ISABus *hppa_isa_bus(void) 57 { 58 ISABus *isa_bus; 59 qemu_irq *isa_irqs; 60 MemoryRegion *isa_region; 61 62 isa_region = g_new(MemoryRegion, 1); 63 memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops, 64 NULL, "isa-io", 0x800); 65 memory_region_add_subregion(get_system_memory(), IDE_HPA, 66 isa_region); 67 68 isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region, 69 &error_abort); 70 isa_irqs = i8259_init(isa_bus, 71 /* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */ 72 NULL); 73 isa_bus_irqs(isa_bus, isa_irqs); 74 75 return isa_bus; 76 } 77 78 static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr) 79 { 80 addr &= (0x10000000 - 1); 81 return addr; 82 } 83 84 static HPPACPU *cpu[HPPA_MAX_CPUS]; 85 static uint64_t firmware_entry; 86 87 static void fw_cfg_boot_set(void *opaque, const char *boot_device, 88 Error **errp) 89 { 90 fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]); 91 } 92 93 static FWCfgState *create_fw_cfg(MachineState *ms) 94 { 95 FWCfgState *fw_cfg; 96 uint64_t val; 97 98 fw_cfg = fw_cfg_init_mem(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4); 99 fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, ms->smp.cpus); 100 fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, HPPA_MAX_CPUS); 101 fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, ms->ram_size); 102 103 val = cpu_to_le64(MIN_SEABIOS_HPPA_VERSION); 104 fw_cfg_add_file(fw_cfg, "/etc/firmware-min-version", 105 g_memdup(&val, sizeof(val)), sizeof(val)); 106 107 val = cpu_to_le64(HPPA_TLB_ENTRIES); 108 fw_cfg_add_file(fw_cfg, "/etc/cpu/tlb_entries", 109 g_memdup(&val, sizeof(val)), sizeof(val)); 110 111 val = cpu_to_le64(HPPA_BTLB_ENTRIES); 112 fw_cfg_add_file(fw_cfg, "/etc/cpu/btlb_entries", 113 g_memdup(&val, sizeof(val)), sizeof(val)); 114 115 val = cpu_to_le64(HPA_POWER_BUTTON); 116 fw_cfg_add_file(fw_cfg, "/etc/power-button-addr", 117 g_memdup(&val, sizeof(val)), sizeof(val)); 118 119 fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, ms->boot_order[0]); 120 qemu_register_boot_set(fw_cfg_boot_set, fw_cfg); 121 122 return fw_cfg; 123 } 124 125 static void machine_hppa_init(MachineState *machine) 126 { 127 const char *kernel_filename = machine->kernel_filename; 128 const char *kernel_cmdline = machine->kernel_cmdline; 129 const char *initrd_filename = machine->initrd_filename; 130 DeviceState *dev; 131 PCIBus *pci_bus; 132 ISABus *isa_bus; 133 qemu_irq rtc_irq, serial_irq; 134 char *firmware_filename; 135 uint64_t firmware_low, firmware_high; 136 long size; 137 uint64_t kernel_entry = 0, kernel_low, kernel_high; 138 MemoryRegion *addr_space = get_system_memory(); 139 MemoryRegion *rom_region; 140 MemoryRegion *cpu_region; 141 long i; 142 unsigned int smp_cpus = machine->smp.cpus; 143 SysBusDevice *s; 144 145 /* Create CPUs. */ 146 for (i = 0; i < smp_cpus; i++) { 147 char *name = g_strdup_printf("cpu%ld-io-eir", i); 148 cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type)); 149 150 cpu_region = g_new(MemoryRegion, 1); 151 memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops, 152 cpu[i], name, 4); 153 memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000, 154 cpu_region); 155 g_free(name); 156 } 157 158 /* Main memory region. */ 159 if (machine->ram_size > 3 * GiB) { 160 error_report("RAM size is currently restricted to 3GB"); 161 exit(EXIT_FAILURE); 162 } 163 memory_region_add_subregion_overlap(addr_space, 0, machine->ram, -1); 164 165 166 /* Init Lasi chip */ 167 lasi_init(addr_space); 168 169 /* Init Dino (PCI host bus chip). */ 170 pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq); 171 assert(pci_bus); 172 173 /* Create ISA bus. */ 174 isa_bus = hppa_isa_bus(); 175 assert(isa_bus); 176 177 /* Realtime clock, used by firmware for PDC_TOD call. */ 178 mc146818_rtc_init(isa_bus, 2000, rtc_irq); 179 180 /* Serial code setup. */ 181 if (serial_hd(0)) { 182 uint32_t addr = DINO_UART_HPA + 0x800; 183 serial_mm_init(addr_space, addr, 0, serial_irq, 184 115200, serial_hd(0), DEVICE_BIG_ENDIAN); 185 } 186 187 /* fw_cfg configuration interface */ 188 create_fw_cfg(machine); 189 190 /* SCSI disk setup. */ 191 dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a")); 192 lsi53c8xx_handle_legacy_cmdline(dev); 193 194 /* Graphics setup. */ 195 if (machine->enable_graphics && vga_interface_type != VGA_NONE) { 196 dev = qdev_new("artist"); 197 s = SYS_BUS_DEVICE(dev); 198 sysbus_realize_and_unref(s, &error_fatal); 199 sysbus_mmio_map(s, 0, LASI_GFX_HPA); 200 sysbus_mmio_map(s, 1, ARTIST_FB_ADDR); 201 } 202 203 /* Network setup. */ 204 for (i = 0; i < nb_nics; i++) { 205 if (!enable_lasi_lan()) { 206 pci_nic_init_nofail(&nd_table[i], pci_bus, "tulip", NULL); 207 } 208 } 209 210 /* register power switch emulation */ 211 qemu_register_powerdown_notifier(&hppa_system_powerdown_notifier); 212 213 /* Load firmware. Given that this is not "real" firmware, 214 but one explicitly written for the emulation, we might as 215 well load it directly from an ELF image. */ 216 firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, 217 machine->firmware ?: "hppa-firmware.img"); 218 if (firmware_filename == NULL) { 219 error_report("no firmware provided"); 220 exit(1); 221 } 222 223 size = load_elf(firmware_filename, NULL, NULL, NULL, 224 &firmware_entry, &firmware_low, &firmware_high, NULL, 225 true, EM_PARISC, 0, 0); 226 227 /* Unfortunately, load_elf sign-extends reading elf32. */ 228 firmware_entry = (target_ureg)firmware_entry; 229 firmware_low = (target_ureg)firmware_low; 230 firmware_high = (target_ureg)firmware_high; 231 232 if (size < 0) { 233 error_report("could not load firmware '%s'", firmware_filename); 234 exit(1); 235 } 236 qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64 237 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n", 238 firmware_low, firmware_high, firmware_entry); 239 if (firmware_low < FIRMWARE_START || firmware_high >= FIRMWARE_END) { 240 error_report("Firmware overlaps with memory or IO space"); 241 exit(1); 242 } 243 g_free(firmware_filename); 244 245 rom_region = g_new(MemoryRegion, 1); 246 memory_region_init_ram(rom_region, NULL, "firmware", 247 (FIRMWARE_END - FIRMWARE_START), &error_fatal); 248 memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region); 249 250 /* Load kernel */ 251 if (kernel_filename) { 252 size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys, 253 NULL, &kernel_entry, &kernel_low, &kernel_high, NULL, 254 true, EM_PARISC, 0, 0); 255 256 /* Unfortunately, load_elf sign-extends reading elf32. */ 257 kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry); 258 kernel_low = (target_ureg)kernel_low; 259 kernel_high = (target_ureg)kernel_high; 260 261 if (size < 0) { 262 error_report("could not load kernel '%s'", kernel_filename); 263 exit(1); 264 } 265 qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64 266 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 267 ", size %" PRIu64 " kB\n", 268 kernel_low, kernel_high, kernel_entry, size / KiB); 269 270 if (kernel_cmdline) { 271 cpu[0]->env.gr[24] = 0x4000; 272 pstrcpy_targphys("cmdline", cpu[0]->env.gr[24], 273 TARGET_PAGE_SIZE, kernel_cmdline); 274 } 275 276 if (initrd_filename) { 277 ram_addr_t initrd_base; 278 int64_t initrd_size; 279 280 initrd_size = get_image_size(initrd_filename); 281 if (initrd_size < 0) { 282 error_report("could not load initial ram disk '%s'", 283 initrd_filename); 284 exit(1); 285 } 286 287 /* Load the initrd image high in memory. 288 Mirror the algorithm used by palo: 289 (1) Due to sign-extension problems and PDC, 290 put the initrd no higher than 1G. 291 (2) Reserve 64k for stack. */ 292 initrd_base = MIN(machine->ram_size, 1 * GiB); 293 initrd_base = initrd_base - 64 * KiB; 294 initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK; 295 296 if (initrd_base < kernel_high) { 297 error_report("kernel and initial ram disk too large!"); 298 exit(1); 299 } 300 301 load_image_targphys(initrd_filename, initrd_base, initrd_size); 302 cpu[0]->env.gr[23] = initrd_base; 303 cpu[0]->env.gr[22] = initrd_base + initrd_size; 304 } 305 } 306 307 if (!kernel_entry) { 308 /* When booting via firmware, tell firmware if we want interactive 309 * mode (kernel_entry=1), and to boot from CD (gr[24]='d') 310 * or hard disc * (gr[24]='c'). 311 */ 312 kernel_entry = boot_menu ? 1 : 0; 313 cpu[0]->env.gr[24] = machine->boot_order[0]; 314 } 315 316 /* We jump to the firmware entry routine and pass the 317 * various parameters in registers. After firmware initialization, 318 * firmware will start the Linux kernel with ramdisk and cmdline. 319 */ 320 cpu[0]->env.gr[26] = machine->ram_size; 321 cpu[0]->env.gr[25] = kernel_entry; 322 323 /* tell firmware how many SMP CPUs to present in inventory table */ 324 cpu[0]->env.gr[21] = smp_cpus; 325 326 /* tell firmware fw_cfg port */ 327 cpu[0]->env.gr[19] = FW_CFG_IO_BASE; 328 } 329 330 static void hppa_machine_reset(MachineState *ms) 331 { 332 unsigned int smp_cpus = ms->smp.cpus; 333 int i; 334 335 qemu_devices_reset(); 336 337 /* Start all CPUs at the firmware entry point. 338 * Monarch CPU will initialize firmware, secondary CPUs 339 * will enter a small idle look and wait for rendevouz. */ 340 for (i = 0; i < smp_cpus; i++) { 341 cpu_set_pc(CPU(cpu[i]), firmware_entry); 342 cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000; 343 } 344 345 /* already initialized by machine_hppa_init()? */ 346 if (cpu[0]->env.gr[26] == ms->ram_size) { 347 return; 348 } 349 350 cpu[0]->env.gr[26] = ms->ram_size; 351 cpu[0]->env.gr[25] = 0; /* no firmware boot menu */ 352 cpu[0]->env.gr[24] = 'c'; 353 /* gr22/gr23 unused, no initrd while reboot. */ 354 cpu[0]->env.gr[21] = smp_cpus; 355 /* tell firmware fw_cfg port */ 356 cpu[0]->env.gr[19] = FW_CFG_IO_BASE; 357 } 358 359 360 static void machine_hppa_machine_init(MachineClass *mc) 361 { 362 mc->desc = "HPPA generic machine"; 363 mc->default_cpu_type = TYPE_HPPA_CPU; 364 mc->init = machine_hppa_init; 365 mc->reset = hppa_machine_reset; 366 mc->block_default_type = IF_SCSI; 367 mc->max_cpus = HPPA_MAX_CPUS; 368 mc->default_cpus = 1; 369 mc->is_default = true; 370 mc->default_ram_size = 512 * MiB; 371 mc->default_boot_order = "cd"; 372 mc->default_ram_id = "ram"; 373 } 374 375 DEFINE_MACHINE("hppa", machine_hppa_machine_init) 376