| 1 | /* |
| 2 | * QEMU fuloong 2e mini pc support |
| 3 | * |
| 4 | * Copyright (c) 2008 yajin (yajin@vm-kernel.org) |
| 5 | * Copyright (c) 2009 chenming (chenming@rdc.faw.com.cn) |
| 6 | * Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com) |
| 7 | * This code is licensed under the GNU GPL v2. |
| 8 | * |
| 9 | * Contributions after 2012-01-13 are licensed under the terms of the |
| 10 | * GNU GPL, version 2 or (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | /* |
| 14 | * Fuloong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz) |
| 15 | * https://www.linux-mips.org/wiki/Fuloong_2E |
| 16 | * |
| 17 | * Loongson 2e manuals: |
| 18 | * https://github.com/loongson-community/docs/tree/master/2E |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include "qemu/datadir.h" |
| 23 | #include "qemu/units.h" |
| 24 | #include "qapi/error.h" |
| 25 | #include "target/mips/cpu.h" |
| 26 | #include "hw/core/clock.h" |
| 27 | #include "net/net.h" |
| 28 | #include "hw/core/boards.h" |
| 29 | #include "hw/i2c/smbus_eeprom.h" |
| 30 | #include "hw/block/flash.h" |
| 31 | #include "hw/mips/mips.h" |
| 32 | #include "hw/mips/bootloader.h" |
| 33 | #include "hw/pci/pci.h" |
| 34 | #include "hw/core/loader.h" |
| 35 | #include "hw/ide/pci.h" |
| 36 | #include "hw/core/qdev-properties.h" |
| 37 | #include "elf.h" |
| 38 | #include "hw/isa/vt82c686.h" |
| 39 | #include "system/qtest.h" |
| 40 | #include "system/reset.h" |
| 41 | #include "system/system.h" |
| 42 | #include "qemu/error-report.h" |
| 43 | #include "exec/tswap.h" |
| 44 | |
| 45 | #define ENVP_PADDR 0x2000 |
| 46 | #define ENVP_VADDR cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR) |
| 47 | #define ENVP_NB_ENTRIES 16 |
| 48 | #define ENVP_ENTRY_SIZE 256 |
| 49 | |
| 50 | /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */ |
| 51 | #define BIOS_SIZE (512 * KiB) |
| 52 | |
| 53 | /* |
| 54 | * PMON is not part of qemu and released with BSD license, anyone |
| 55 | * who want to build a pmon binary please first git-clone the source |
| 56 | * from the git repository at: |
| 57 | * https://github.com/loongson-community/pmon |
| 58 | */ |
| 59 | #define FULOONG_BIOSNAME "pmon_2e.bin" |
| 60 | |
| 61 | /* PCI SLOT in Fuloong 2e */ |
| 62 | #define FULOONG2E_VIA_SLOT 5 |
| 63 | #define FULOONG2E_ATI_SLOT 6 |
| 64 | #define FULOONG2E_RTL8139_SLOT 7 |
| 65 | |
| 66 | static struct _loaderparams { |
| 67 | int ram_size; |
| 68 | const char *kernel_filename; |
| 69 | const char *kernel_cmdline; |
| 70 | const char *initrd_filename; |
| 71 | } loaderparams; |
| 72 | |
| 73 | static void G_GNUC_PRINTF(3, 4) prom_set(uint32_t *prom_buf, int index, |
| 74 | const char *string, ...) |
| 75 | { |
| 76 | va_list ap; |
| 77 | int32_t table_addr; |
| 78 | |
| 79 | if (index >= ENVP_NB_ENTRIES) { |
| 80 | return; |
| 81 | } |
| 82 | |
| 83 | if (string == NULL) { |
| 84 | prom_buf[index] = 0; |
| 85 | return; |
| 86 | } |
| 87 | |
| 88 | table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE; |
| 89 | prom_buf[index] = tswap32(ENVP_VADDR + table_addr); |
| 90 | |
| 91 | va_start(ap, string); |
| 92 | vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap); |
| 93 | va_end(ap); |
| 94 | } |
| 95 | |
| 96 | static uint64_t load_kernel(MIPSCPU *cpu) |
| 97 | { |
| 98 | uint64_t kernel_entry, kernel_high, initrd_size; |
| 99 | int index = 0; |
| 100 | long kernel_size; |
| 101 | ram_addr_t initrd_offset; |
| 102 | uint32_t *prom_buf; |
| 103 | long prom_size; |
| 104 | |
| 105 | kernel_size = load_elf(loaderparams.kernel_filename, NULL, |
| 106 | cpu_mips_kseg0_to_phys, NULL, |
| 107 | &kernel_entry, NULL, |
| 108 | &kernel_high, NULL, |
| 109 | ELFDATA2LSB, EM_MIPS, 1, 0); |
| 110 | if (kernel_size < 0) { |
| 111 | error_report("could not load kernel '%s': %s", |
| 112 | loaderparams.kernel_filename, |
| 113 | load_elf_strerror(kernel_size)); |
| 114 | exit(1); |
| 115 | } |
| 116 | |
| 117 | /* load initrd */ |
| 118 | initrd_size = 0; |
| 119 | initrd_offset = 0; |
| 120 | if (loaderparams.initrd_filename) { |
| 121 | initrd_size = get_image_size(loaderparams.initrd_filename, NULL); |
| 122 | if (initrd_size > 0) { |
| 123 | initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE); |
| 124 | if (initrd_offset + initrd_size > loaderparams.ram_size) { |
| 125 | error_report("memory too small for initial ram disk '%s'", |
| 126 | loaderparams.initrd_filename); |
| 127 | exit(1); |
| 128 | } |
| 129 | initrd_size = load_image_targphys(loaderparams.initrd_filename, |
| 130 | initrd_offset, |
| 131 | loaderparams.ram_size - initrd_offset, |
| 132 | NULL); |
| 133 | } |
| 134 | if (initrd_size == (target_ulong) -1) { |
| 135 | error_report("could not load initial ram disk '%s'", |
| 136 | loaderparams.initrd_filename); |
| 137 | exit(1); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | /* Setup prom parameters. */ |
| 142 | prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE); |
| 143 | prom_buf = g_malloc(prom_size); |
| 144 | |
| 145 | prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename); |
| 146 | if (initrd_size > 0) { |
| 147 | prom_set(prom_buf, index++, |
| 148 | "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s", |
| 149 | cpu_mips_phys_to_kseg0(NULL, initrd_offset), |
| 150 | initrd_size, loaderparams.kernel_cmdline); |
| 151 | } else { |
| 152 | prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline); |
| 153 | } |
| 154 | |
| 155 | /* Setup minimum environment variables */ |
| 156 | prom_set(prom_buf, index++, "busclock=33000000"); |
| 157 | prom_set(prom_buf, index++, "cpuclock=%u", clock_get_hz(cpu->clock)); |
| 158 | prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB); |
| 159 | prom_set(prom_buf, index++, NULL); |
| 160 | |
| 161 | rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR); |
| 162 | |
| 163 | g_free(prom_buf); |
| 164 | return kernel_entry; |
| 165 | } |
| 166 | |
| 167 | static void write_bootloader(CPUMIPSState *env, uint8_t *base, |
| 168 | uint64_t kernel_addr) |
| 169 | { |
| 170 | uint32_t *p; |
| 171 | |
| 172 | /* Small bootloader */ |
| 173 | p = (uint32_t *)base; |
| 174 | |
| 175 | /* j 0x1fc00040 */ |
| 176 | stl_p(p++, 0x0bf00010); |
| 177 | /* nop */ |
| 178 | stl_p(p++, 0x00000000); |
| 179 | |
| 180 | /* Second part of the bootloader */ |
| 181 | p = (uint32_t *)(base + 0x040); |
| 182 | |
| 183 | bl_gen_jump_kernel((void **)&p, |
| 184 | true, ENVP_VADDR - 64, |
| 185 | true, 2, true, ENVP_VADDR, |
| 186 | true, ENVP_VADDR + 8, |
| 187 | true, loaderparams.ram_size, |
| 188 | kernel_addr); |
| 189 | } |
| 190 | |
| 191 | static void main_cpu_reset(void *opaque) |
| 192 | { |
| 193 | MIPSCPU *cpu = opaque; |
| 194 | CPUMIPSState *env = &cpu->env; |
| 195 | |
| 196 | cpu_reset(CPU(cpu)); |
| 197 | /* TODO: 2E reset stuff */ |
| 198 | if (loaderparams.kernel_filename) { |
| 199 | env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL)); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | /* Network support */ |
| 204 | static void network_init(PCIBus *pci_bus) |
| 205 | { |
| 206 | /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */ |
| 207 | pci_init_nic_in_slot(pci_bus, "rtl8139", NULL, "07"); |
| 208 | pci_init_nic_devices(pci_bus, "rtl8139"); |
| 209 | } |
| 210 | |
| 211 | static void mips_fuloong2e_init(MachineState *machine) |
| 212 | { |
| 213 | const char *kernel_filename = machine->kernel_filename; |
| 214 | const char *kernel_cmdline = machine->kernel_cmdline; |
| 215 | const char *initrd_filename = machine->initrd_filename; |
| 216 | char *filename; |
| 217 | MemoryRegion *address_space_mem = get_system_memory(); |
| 218 | MemoryRegion *bios = g_new(MemoryRegion, 1); |
| 219 | long bios_size; |
| 220 | uint8_t *spd_data; |
| 221 | uint64_t kernel_entry; |
| 222 | PCIDevice *pci_dev; |
| 223 | PCIBus *pci_bus; |
| 224 | I2CBus *smbus; |
| 225 | Clock *cpuclk; |
| 226 | MIPSCPU *cpu; |
| 227 | CPUMIPSState *env; |
| 228 | DeviceState *dev; |
| 229 | |
| 230 | cpuclk = clock_new(OBJECT(machine), "cpu-refclk"); |
| 231 | clock_set_hz(cpuclk, 533080000); /* ~533 MHz */ |
| 232 | |
| 233 | /* init CPUs */ |
| 234 | cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk, false); |
| 235 | env = &cpu->env; |
| 236 | |
| 237 | qemu_register_reset(main_cpu_reset, cpu); |
| 238 | |
| 239 | /* TODO: support more than 256M RAM as highmem */ |
| 240 | if (machine->ram_size != 256 * MiB) { |
| 241 | error_report("Invalid RAM size, should be 256MB"); |
| 242 | exit(EXIT_FAILURE); |
| 243 | } |
| 244 | memory_region_add_subregion(address_space_mem, 0, machine->ram); |
| 245 | |
| 246 | /* Boot ROM */ |
| 247 | memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE, |
| 248 | &error_fatal); |
| 249 | memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios); |
| 250 | |
| 251 | /* |
| 252 | * We do not support flash operation, just loading pmon.bin as raw BIOS. |
| 253 | * Please use -L to set the BIOS path and -bios to set bios name. |
| 254 | */ |
| 255 | |
| 256 | if (kernel_filename) { |
| 257 | loaderparams.ram_size = machine->ram_size; |
| 258 | loaderparams.kernel_filename = kernel_filename; |
| 259 | loaderparams.kernel_cmdline = kernel_cmdline; |
| 260 | loaderparams.initrd_filename = initrd_filename; |
| 261 | kernel_entry = load_kernel(cpu); |
| 262 | write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry); |
| 263 | } else { |
| 264 | filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, |
| 265 | machine->firmware ?: FULOONG_BIOSNAME); |
| 266 | if (filename) { |
| 267 | bios_size = load_image_targphys(filename, 0x1fc00000LL, |
| 268 | BIOS_SIZE, NULL); |
| 269 | g_free(filename); |
| 270 | } else { |
| 271 | bios_size = -1; |
| 272 | } |
| 273 | |
| 274 | if ((bios_size < 0 || bios_size > BIOS_SIZE) && |
| 275 | machine->firmware && !qtest_enabled()) { |
| 276 | error_report("Could not load MIPS bios '%s'", machine->firmware); |
| 277 | exit(1); |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | /* Init internal devices */ |
| 282 | cpu_mips_irq_init_cpu(cpu); |
| 283 | cpu_mips_clock_init(cpu); |
| 284 | |
| 285 | /* North bridge, Bonito --> IP2 */ |
| 286 | pci_bus = bonito_init((qemu_irq *)&(env->irq[2])); |
| 287 | |
| 288 | /* South bridge -> IP5 */ |
| 289 | pci_dev = pci_new_multifunction(PCI_DEVFN(FULOONG2E_VIA_SLOT, 0), |
| 290 | TYPE_VT82C686B_ISA); |
| 291 | |
| 292 | /* Set properties on individual devices before realizing the south bridge */ |
| 293 | if (machine->audiodev) { |
| 294 | dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "ac97")); |
| 295 | qdev_prop_set_string(dev, "audiodev", machine->audiodev); |
| 296 | } |
| 297 | |
| 298 | pci_realize_and_unref(pci_dev, pci_bus, &error_abort); |
| 299 | |
| 300 | object_property_add_alias(OBJECT(machine), "rtc-time", |
| 301 | object_resolve_path_component(OBJECT(pci_dev), |
| 302 | "rtc"), |
| 303 | "date"); |
| 304 | qdev_connect_gpio_out_named(DEVICE(pci_dev), "intr", 0, env->irq[5]); |
| 305 | |
| 306 | dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "ide")); |
| 307 | pci_ide_create_devs(PCI_DEVICE(dev)); |
| 308 | |
| 309 | dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "pm")); |
| 310 | smbus = I2C_BUS(qdev_get_child_bus(dev, "i2c")); |
| 311 | |
| 312 | /* GPU */ |
| 313 | if (vga_interface_type != VGA_NONE) { |
| 314 | vga_interface_created = true; |
| 315 | pci_dev = pci_new(-1, "ati-vga"); |
| 316 | dev = DEVICE(pci_dev); |
| 317 | qdev_prop_set_uint32(dev, "vgamem_mb", 16); |
| 318 | qdev_prop_set_uint16(dev, "x-device-id", 0x5159); |
| 319 | qdev_prop_set_uint64(dev, "x-linear-aper-size", 16 * MiB); |
| 320 | pci_realize_and_unref(pci_dev, pci_bus, &error_fatal); |
| 321 | } |
| 322 | |
| 323 | /* Populate SPD eeprom data */ |
| 324 | spd_data = spd_data_generate(DDR, machine->ram_size); |
| 325 | smbus_eeprom_init_one(smbus, 0x50, spd_data); |
| 326 | |
| 327 | /* Network card: RTL8139D */ |
| 328 | network_init(pci_bus); |
| 329 | } |
| 330 | |
| 331 | static void mips_fuloong2e_machine_init(MachineClass *mc) |
| 332 | { |
| 333 | mc->desc = "Fuloong 2e mini pc"; |
| 334 | mc->init = mips_fuloong2e_init; |
| 335 | mc->block_default_type = IF_IDE; |
| 336 | mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E"); |
| 337 | mc->default_ram_size = 256 * MiB; |
| 338 | mc->default_ram_id = "fuloong2e.ram"; |
| 339 | machine_add_audiodev_property(mc); |
| 340 | } |
| 341 | |
| 342 | DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init) |