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 "hw/hw.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 "hw/timer/mc146818rtc.h" 17 #include "hw/ide.h" 18 #include "hw/timer/i8254.h" 19 #include "hw/char/serial.h" 20 #include "hppa_sys.h" 21 #include "qemu/units.h" 22 #include "qapi/error.h" 23 #include "qemu/log.h" 24 25 #define MAX_IDE_BUS 2 26 27 static ISABus *hppa_isa_bus(void) 28 { 29 ISABus *isa_bus; 30 qemu_irq *isa_irqs; 31 MemoryRegion *isa_region; 32 33 isa_region = g_new(MemoryRegion, 1); 34 memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops, 35 NULL, "isa-io", 0x800); 36 memory_region_add_subregion(get_system_memory(), IDE_HPA, 37 isa_region); 38 39 isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region, 40 &error_abort); 41 isa_irqs = i8259_init(isa_bus, 42 /* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */ 43 NULL); 44 isa_bus_irqs(isa_bus, isa_irqs); 45 46 return isa_bus; 47 } 48 49 static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr) 50 { 51 addr &= (0x10000000 - 1); 52 return addr; 53 } 54 55 static HPPACPU *cpu[HPPA_MAX_CPUS]; 56 static uint64_t firmware_entry; 57 58 static void machine_hppa_init(MachineState *machine) 59 { 60 const char *kernel_filename = machine->kernel_filename; 61 const char *kernel_cmdline = machine->kernel_cmdline; 62 const char *initrd_filename = machine->initrd_filename; 63 DeviceState *dev; 64 PCIBus *pci_bus; 65 ISABus *isa_bus; 66 qemu_irq rtc_irq, serial_irq; 67 char *firmware_filename; 68 uint64_t firmware_low, firmware_high; 69 long size; 70 uint64_t kernel_entry = 0, kernel_low, kernel_high; 71 MemoryRegion *addr_space = get_system_memory(); 72 MemoryRegion *rom_region; 73 MemoryRegion *ram_region; 74 MemoryRegion *cpu_region; 75 long i; 76 unsigned int smp_cpus = machine->smp.cpus; 77 78 ram_size = machine->ram_size; 79 80 /* Create CPUs. */ 81 for (i = 0; i < smp_cpus; i++) { 82 cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type)); 83 84 cpu_region = g_new(MemoryRegion, 1); 85 memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops, 86 cpu[i], g_strdup_printf("cpu%ld-io-eir", i), 4); 87 memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000, 88 cpu_region); 89 } 90 91 /* Limit main memory. */ 92 if (ram_size > FIRMWARE_START) { 93 machine->ram_size = ram_size = FIRMWARE_START; 94 } 95 96 /* Main memory region. */ 97 ram_region = g_new(MemoryRegion, 1); 98 memory_region_allocate_system_memory(ram_region, OBJECT(machine), 99 "ram", ram_size); 100 memory_region_add_subregion(addr_space, 0, ram_region); 101 102 /* Init Dino (PCI host bus chip). */ 103 pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq); 104 assert(pci_bus); 105 106 /* Create ISA bus. */ 107 isa_bus = hppa_isa_bus(); 108 assert(isa_bus); 109 110 /* Realtime clock, used by firmware for PDC_TOD call. */ 111 mc146818_rtc_init(isa_bus, 2000, rtc_irq); 112 113 /* Serial code setup. */ 114 if (serial_hd(0)) { 115 uint32_t addr = DINO_UART_HPA + 0x800; 116 serial_mm_init(addr_space, addr, 0, serial_irq, 117 115200, serial_hd(0), DEVICE_BIG_ENDIAN); 118 } 119 120 /* SCSI disk setup. */ 121 dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a")); 122 lsi53c8xx_handle_legacy_cmdline(dev); 123 124 /* Network setup. e1000 is good enough, failing Tulip support. */ 125 for (i = 0; i < nb_nics; i++) { 126 pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL); 127 } 128 129 /* Load firmware. Given that this is not "real" firmware, 130 but one explicitly written for the emulation, we might as 131 well load it directly from an ELF image. */ 132 firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, 133 bios_name ? bios_name : 134 "hppa-firmware.img"); 135 if (firmware_filename == NULL) { 136 error_report("no firmware provided"); 137 exit(1); 138 } 139 140 size = load_elf(firmware_filename, NULL, NULL, NULL, 141 &firmware_entry, &firmware_low, &firmware_high, 142 true, EM_PARISC, 0, 0); 143 144 /* Unfortunately, load_elf sign-extends reading elf32. */ 145 firmware_entry = (target_ureg)firmware_entry; 146 firmware_low = (target_ureg)firmware_low; 147 firmware_high = (target_ureg)firmware_high; 148 149 if (size < 0) { 150 error_report("could not load firmware '%s'", firmware_filename); 151 exit(1); 152 } 153 qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64 154 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n", 155 firmware_low, firmware_high, firmware_entry); 156 if (firmware_low < ram_size || firmware_high >= FIRMWARE_END) { 157 error_report("Firmware overlaps with memory or IO space"); 158 exit(1); 159 } 160 g_free(firmware_filename); 161 162 rom_region = g_new(MemoryRegion, 1); 163 memory_region_allocate_system_memory(rom_region, OBJECT(machine), 164 "firmware", 165 (FIRMWARE_END - FIRMWARE_START)); 166 memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region); 167 168 /* Load kernel */ 169 if (kernel_filename) { 170 size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys, 171 NULL, &kernel_entry, &kernel_low, &kernel_high, 172 true, EM_PARISC, 0, 0); 173 174 /* Unfortunately, load_elf sign-extends reading elf32. */ 175 kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry); 176 kernel_low = (target_ureg)kernel_low; 177 kernel_high = (target_ureg)kernel_high; 178 179 if (size < 0) { 180 error_report("could not load kernel '%s'", kernel_filename); 181 exit(1); 182 } 183 qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64 184 "-0x%08" PRIx64 ", entry at 0x%08" PRIx64 185 ", size %" PRIu64 " kB\n", 186 kernel_low, kernel_high, kernel_entry, size / KiB); 187 188 if (kernel_cmdline) { 189 cpu[0]->env.gr[24] = 0x4000; 190 pstrcpy_targphys("cmdline", cpu[0]->env.gr[24], 191 TARGET_PAGE_SIZE, kernel_cmdline); 192 } 193 194 if (initrd_filename) { 195 ram_addr_t initrd_base; 196 int64_t initrd_size; 197 198 initrd_size = get_image_size(initrd_filename); 199 if (initrd_size < 0) { 200 error_report("could not load initial ram disk '%s'", 201 initrd_filename); 202 exit(1); 203 } 204 205 /* Load the initrd image high in memory. 206 Mirror the algorithm used by palo: 207 (1) Due to sign-extension problems and PDC, 208 put the initrd no higher than 1G. 209 (2) Reserve 64k for stack. */ 210 initrd_base = MIN(ram_size, 1 * GiB); 211 initrd_base = initrd_base - 64 * KiB; 212 initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK; 213 214 if (initrd_base < kernel_high) { 215 error_report("kernel and initial ram disk too large!"); 216 exit(1); 217 } 218 219 load_image_targphys(initrd_filename, initrd_base, initrd_size); 220 cpu[0]->env.gr[23] = initrd_base; 221 cpu[0]->env.gr[22] = initrd_base + initrd_size; 222 } 223 } 224 225 if (!kernel_entry) { 226 /* When booting via firmware, tell firmware if we want interactive 227 * mode (kernel_entry=1), and to boot from CD (gr[24]='d') 228 * or hard disc * (gr[24]='c'). 229 */ 230 kernel_entry = boot_menu ? 1 : 0; 231 cpu[0]->env.gr[24] = machine->boot_order[0]; 232 } 233 234 /* We jump to the firmware entry routine and pass the 235 * various parameters in registers. After firmware initialization, 236 * firmware will start the Linux kernel with ramdisk and cmdline. 237 */ 238 cpu[0]->env.gr[26] = ram_size; 239 cpu[0]->env.gr[25] = kernel_entry; 240 241 /* tell firmware how many SMP CPUs to present in inventory table */ 242 cpu[0]->env.gr[21] = smp_cpus; 243 } 244 245 static void hppa_machine_reset(MachineState *ms) 246 { 247 unsigned int smp_cpus = ms->smp.cpus; 248 int i; 249 250 qemu_devices_reset(); 251 252 /* Start all CPUs at the firmware entry point. 253 * Monarch CPU will initialize firmware, secondary CPUs 254 * will enter a small idle look and wait for rendevouz. */ 255 for (i = 0; i < smp_cpus; i++) { 256 cpu_set_pc(CPU(cpu[i]), firmware_entry); 257 cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000; 258 } 259 260 /* already initialized by machine_hppa_init()? */ 261 if (cpu[0]->env.gr[26] == ram_size) { 262 return; 263 } 264 265 cpu[0]->env.gr[26] = ram_size; 266 cpu[0]->env.gr[25] = 0; /* no firmware boot menu */ 267 cpu[0]->env.gr[24] = 'c'; 268 /* gr22/gr23 unused, no initrd while reboot. */ 269 cpu[0]->env.gr[21] = smp_cpus; 270 } 271 272 273 static void machine_hppa_machine_init(MachineClass *mc) 274 { 275 mc->desc = "HPPA generic machine"; 276 mc->default_cpu_type = TYPE_HPPA_CPU; 277 mc->init = machine_hppa_init; 278 mc->reset = hppa_machine_reset; 279 mc->block_default_type = IF_SCSI; 280 mc->max_cpus = HPPA_MAX_CPUS; 281 mc->default_cpus = 1; 282 mc->is_default = 1; 283 mc->default_ram_size = 512 * MiB; 284 mc->default_boot_order = "cd"; 285 } 286 287 DEFINE_MACHINE("hppa", machine_hppa_machine_init) 288