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/rtc/mc146818rtc.h" 16 #include "hw/ide.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 26 #define MAX_IDE_BUS 2 27 28 static ISABus *hppa_isa_bus(void) 29 { 30 ISABus *isa_bus; 31 qemu_irq *isa_irqs; 32 MemoryRegion *isa_region; 33 34 isa_region = g_new(MemoryRegion, 1); 35 memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops, 36 NULL, "isa-io", 0x800); 37 memory_region_add_subregion(get_system_memory(), IDE_HPA, 38 isa_region); 39 40 isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region, 41 &error_abort); 42 isa_irqs = i8259_init(isa_bus, 43 /* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */ 44 NULL); 45 isa_bus_irqs(isa_bus, isa_irqs); 46 47 return isa_bus; 48 } 49 50 static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr) 51 { 52 addr &= (0x10000000 - 1); 53 return addr; 54 } 55 56 static HPPACPU *cpu[HPPA_MAX_CPUS]; 57 static uint64_t firmware_entry; 58 59 static void machine_hppa_init(MachineState *machine) 60 { 61 const char *kernel_filename = machine->kernel_filename; 62 const char *kernel_cmdline = machine->kernel_cmdline; 63 const char *initrd_filename = machine->initrd_filename; 64 DeviceState *dev; 65 PCIBus *pci_bus; 66 ISABus *isa_bus; 67 qemu_irq rtc_irq, serial_irq; 68 char *firmware_filename; 69 uint64_t firmware_low, firmware_high; 70 long size; 71 uint64_t kernel_entry = 0, kernel_low, kernel_high; 72 MemoryRegion *addr_space = get_system_memory(); 73 MemoryRegion *rom_region; 74 MemoryRegion *ram_region; 75 MemoryRegion *cpu_region; 76 long i; 77 unsigned int smp_cpus = machine->smp.cpus; 78 SysBusDevice *s; 79 80 ram_size = machine->ram_size; 81 82 /* Create CPUs. */ 83 for (i = 0; i < smp_cpus; i++) { 84 char *name = g_strdup_printf("cpu%ld-io-eir", i); 85 cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type)); 86 87 cpu_region = g_new(MemoryRegion, 1); 88 memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops, 89 cpu[i], name, 4); 90 memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000, 91 cpu_region); 92 g_free(name); 93 } 94 95 /* Main memory region. */ 96 if (machine->ram_size > 3 * GiB) { 97 error_report("RAM size is currently restricted to 3GB"); 98 exit(EXIT_FAILURE); 99 } 100 ram_region = g_new(MemoryRegion, 1); 101 memory_region_allocate_system_memory(ram_region, OBJECT(machine), 102 "ram", ram_size); 103 memory_region_add_subregion_overlap(addr_space, 0, ram_region, -1); 104 105 /* Init Lasi chip */ 106 lasi_init(addr_space); 107 108 /* Init Dino (PCI host bus chip). */ 109 pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq); 110 assert(pci_bus); 111 112 /* Create ISA bus. */ 113 isa_bus = hppa_isa_bus(); 114 assert(isa_bus); 115 116 /* Realtime clock, used by firmware for PDC_TOD call. */ 117 mc146818_rtc_init(isa_bus, 2000, rtc_irq); 118 119 /* Serial code setup. */ 120 if (serial_hd(0)) { 121 uint32_t addr = DINO_UART_HPA + 0x800; 122 serial_mm_init(addr_space, addr, 0, serial_irq, 123 115200, serial_hd(0), DEVICE_BIG_ENDIAN); 124 } 125 126 /* SCSI disk setup. */ 127 dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a")); 128 lsi53c8xx_handle_legacy_cmdline(dev); 129 130 /* Graphics setup. */ 131 if (machine->enable_graphics && vga_interface_type != VGA_NONE) { 132 dev = qdev_create(NULL, "artist"); 133 qdev_init_nofail(dev); 134 s = SYS_BUS_DEVICE(dev); 135 sysbus_mmio_map(s, 0, LASI_GFX_HPA); 136 sysbus_mmio_map(s, 1, ARTIST_FB_ADDR); 137 } 138 139 /* Network setup. */ 140 for (i = 0; i < nb_nics; i++) { 141 if (!enable_lasi_lan()) { 142 pci_nic_init_nofail(&nd_table[i], pci_bus, "tulip", NULL); 143 } 144 } 145 146 /* Load firmware. Given that this is not "real" firmware, 147 but one explicitly written for the emulation, we might as 148 well load it directly from an ELF image. */ 149 firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, 150 bios_name ? bios_name : 151 "hppa-firmware.img"); 152 if (firmware_filename == NULL) { 153 error_report("no firmware provided"); 154 exit(1); 155 } 156 157 size = load_elf(firmware_filename, NULL, NULL, NULL, 158 &firmware_entry, &firmware_low, &firmware_high, NULL, 159 true, EM_PARISC, 0, 0); 160 161 /* Unfortunately, load_elf sign-extends reading elf32. */ 162 firmware_entry = (target_ureg)firmware_entry; 163 firmware_low = (target_ureg)firmware_low; 164 firmware_high = (target_ureg)firmware_high; 165 166 if (size < 0) { 167 error_report("could not load firmware '%s'", firmware_filename); 168 exit(1); 169 } 170 qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64 171 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n", 172 firmware_low, firmware_high, firmware_entry); 173 if (firmware_low < FIRMWARE_START || firmware_high >= FIRMWARE_END) { 174 error_report("Firmware overlaps with memory or IO space"); 175 exit(1); 176 } 177 g_free(firmware_filename); 178 179 rom_region = g_new(MemoryRegion, 1); 180 memory_region_init_ram(rom_region, NULL, "firmware", 181 (FIRMWARE_END - FIRMWARE_START), &error_fatal); 182 memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region); 183 184 /* Load kernel */ 185 if (kernel_filename) { 186 size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys, 187 NULL, &kernel_entry, &kernel_low, &kernel_high, NULL, 188 true, EM_PARISC, 0, 0); 189 190 /* Unfortunately, load_elf sign-extends reading elf32. */ 191 kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry); 192 kernel_low = (target_ureg)kernel_low; 193 kernel_high = (target_ureg)kernel_high; 194 195 if (size < 0) { 196 error_report("could not load kernel '%s'", kernel_filename); 197 exit(1); 198 } 199 qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64 200 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 201 ", size %" PRIu64 " kB\n", 202 kernel_low, kernel_high, kernel_entry, size / KiB); 203 204 if (kernel_cmdline) { 205 cpu[0]->env.gr[24] = 0x4000; 206 pstrcpy_targphys("cmdline", cpu[0]->env.gr[24], 207 TARGET_PAGE_SIZE, kernel_cmdline); 208 } 209 210 if (initrd_filename) { 211 ram_addr_t initrd_base; 212 int64_t initrd_size; 213 214 initrd_size = get_image_size(initrd_filename); 215 if (initrd_size < 0) { 216 error_report("could not load initial ram disk '%s'", 217 initrd_filename); 218 exit(1); 219 } 220 221 /* Load the initrd image high in memory. 222 Mirror the algorithm used by palo: 223 (1) Due to sign-extension problems and PDC, 224 put the initrd no higher than 1G. 225 (2) Reserve 64k for stack. */ 226 initrd_base = MIN(ram_size, 1 * GiB); 227 initrd_base = initrd_base - 64 * KiB; 228 initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK; 229 230 if (initrd_base < kernel_high) { 231 error_report("kernel and initial ram disk too large!"); 232 exit(1); 233 } 234 235 load_image_targphys(initrd_filename, initrd_base, initrd_size); 236 cpu[0]->env.gr[23] = initrd_base; 237 cpu[0]->env.gr[22] = initrd_base + initrd_size; 238 } 239 } 240 241 if (!kernel_entry) { 242 /* When booting via firmware, tell firmware if we want interactive 243 * mode (kernel_entry=1), and to boot from CD (gr[24]='d') 244 * or hard disc * (gr[24]='c'). 245 */ 246 kernel_entry = boot_menu ? 1 : 0; 247 cpu[0]->env.gr[24] = machine->boot_order[0]; 248 } 249 250 /* We jump to the firmware entry routine and pass the 251 * various parameters in registers. After firmware initialization, 252 * firmware will start the Linux kernel with ramdisk and cmdline. 253 */ 254 cpu[0]->env.gr[26] = ram_size; 255 cpu[0]->env.gr[25] = kernel_entry; 256 257 /* tell firmware how many SMP CPUs to present in inventory table */ 258 cpu[0]->env.gr[21] = smp_cpus; 259 } 260 261 static void hppa_machine_reset(MachineState *ms) 262 { 263 unsigned int smp_cpus = ms->smp.cpus; 264 int i; 265 266 qemu_devices_reset(); 267 268 /* Start all CPUs at the firmware entry point. 269 * Monarch CPU will initialize firmware, secondary CPUs 270 * will enter a small idle look and wait for rendevouz. */ 271 for (i = 0; i < smp_cpus; i++) { 272 cpu_set_pc(CPU(cpu[i]), firmware_entry); 273 cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000; 274 } 275 276 /* already initialized by machine_hppa_init()? */ 277 if (cpu[0]->env.gr[26] == ram_size) { 278 return; 279 } 280 281 cpu[0]->env.gr[26] = ram_size; 282 cpu[0]->env.gr[25] = 0; /* no firmware boot menu */ 283 cpu[0]->env.gr[24] = 'c'; 284 /* gr22/gr23 unused, no initrd while reboot. */ 285 cpu[0]->env.gr[21] = smp_cpus; 286 } 287 288 289 static void machine_hppa_machine_init(MachineClass *mc) 290 { 291 mc->desc = "HPPA generic machine"; 292 mc->default_cpu_type = TYPE_HPPA_CPU; 293 mc->init = machine_hppa_init; 294 mc->reset = hppa_machine_reset; 295 mc->block_default_type = IF_SCSI; 296 mc->max_cpus = HPPA_MAX_CPUS; 297 mc->default_cpus = 1; 298 mc->is_default = 1; 299 mc->default_ram_size = 512 * MiB; 300 mc->default_boot_order = "cd"; 301 } 302 303 DEFINE_MACHINE("hppa", machine_hppa_machine_init) 304