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-common.h" 23 #include "qemu/datadir.h" 24 #include "qemu/units.h" 25 #include "qapi/error.h" 26 #include "cpu.h" 27 #include "hw/clock.h" 28 #include "net/net.h" 29 #include "hw/boards.h" 30 #include "hw/i2c/smbus_eeprom.h" 31 #include "hw/block/flash.h" 32 #include "hw/mips/mips.h" 33 #include "hw/mips/bootloader.h" 34 #include "hw/mips/cpudevs.h" 35 #include "hw/pci/pci.h" 36 #include "hw/loader.h" 37 #include "hw/ide/pci.h" 38 #include "hw/qdev-properties.h" 39 #include "elf.h" 40 #include "hw/isa/vt82c686.h" 41 #include "exec/address-spaces.h" 42 #include "sysemu/qtest.h" 43 #include "sysemu/reset.h" 44 #include "sysemu/sysemu.h" 45 #include "qemu/error-report.h" 46 47 #define ENVP_PADDR 0x2000 48 #define ENVP_VADDR cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR) 49 #define ENVP_NB_ENTRIES 16 50 #define ENVP_ENTRY_SIZE 256 51 52 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */ 53 #define BIOS_SIZE (512 * KiB) 54 #define MAX_IDE_BUS 2 55 56 /* 57 * PMON is not part of qemu and released with BSD license, anyone 58 * who want to build a pmon binary please first git-clone the source 59 * from the git repository at: 60 * https://github.com/loongson-community/pmon 61 */ 62 #define FULOONG_BIOSNAME "pmon_2e.bin" 63 64 /* PCI SLOT in Fuloong 2e */ 65 #define FULOONG2E_VIA_SLOT 5 66 #define FULOONG2E_ATI_SLOT 6 67 #define FULOONG2E_RTL8139_SLOT 7 68 69 static struct _loaderparams { 70 int ram_size; 71 const char *kernel_filename; 72 const char *kernel_cmdline; 73 const char *initrd_filename; 74 } loaderparams; 75 76 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index, 77 const char *string, ...) 78 { 79 va_list ap; 80 int32_t table_addr; 81 82 if (index >= ENVP_NB_ENTRIES) { 83 return; 84 } 85 86 if (string == NULL) { 87 prom_buf[index] = 0; 88 return; 89 } 90 91 table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE; 92 prom_buf[index] = tswap32(ENVP_VADDR + table_addr); 93 94 va_start(ap, string); 95 vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap); 96 va_end(ap); 97 } 98 99 static uint64_t load_kernel(MIPSCPU *cpu) 100 { 101 uint64_t kernel_entry, kernel_high, initrd_size; 102 int index = 0; 103 long kernel_size; 104 ram_addr_t initrd_offset; 105 uint32_t *prom_buf; 106 long prom_size; 107 108 kernel_size = load_elf(loaderparams.kernel_filename, NULL, 109 cpu_mips_kseg0_to_phys, NULL, 110 &kernel_entry, NULL, 111 &kernel_high, NULL, 112 0, EM_MIPS, 1, 0); 113 if (kernel_size < 0) { 114 error_report("could not load kernel '%s': %s", 115 loaderparams.kernel_filename, 116 load_elf_strerror(kernel_size)); 117 exit(1); 118 } 119 120 /* load initrd */ 121 initrd_size = 0; 122 initrd_offset = 0; 123 if (loaderparams.initrd_filename) { 124 initrd_size = get_image_size(loaderparams.initrd_filename); 125 if (initrd_size > 0) { 126 initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE); 127 if (initrd_offset + initrd_size > loaderparams.ram_size) { 128 error_report("memory too small for initial ram disk '%s'", 129 loaderparams.initrd_filename); 130 exit(1); 131 } 132 initrd_size = load_image_targphys(loaderparams.initrd_filename, 133 initrd_offset, 134 loaderparams.ram_size - initrd_offset); 135 } 136 if (initrd_size == (target_ulong) -1) { 137 error_report("could not load initial ram disk '%s'", 138 loaderparams.initrd_filename); 139 exit(1); 140 } 141 } 142 143 /* Setup prom parameters. */ 144 prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE); 145 prom_buf = g_malloc(prom_size); 146 147 prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename); 148 if (initrd_size > 0) { 149 prom_set(prom_buf, index++, 150 "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s", 151 cpu_mips_phys_to_kseg0(NULL, initrd_offset), 152 initrd_size, loaderparams.kernel_cmdline); 153 } else { 154 prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline); 155 } 156 157 /* Setup minimum environment variables */ 158 prom_set(prom_buf, index++, "busclock=33000000"); 159 prom_set(prom_buf, index++, "cpuclock=%u", clock_get_hz(cpu->clock)); 160 prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB); 161 prom_set(prom_buf, index++, NULL); 162 163 rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR); 164 165 g_free(prom_buf); 166 return kernel_entry; 167 } 168 169 static void write_bootloader(CPUMIPSState *env, uint8_t *base, 170 uint64_t kernel_addr) 171 { 172 uint32_t *p; 173 174 /* Small bootloader */ 175 p = (uint32_t *)base; 176 177 /* j 0x1fc00040 */ 178 stl_p(p++, 0x0bf00010); 179 /* nop */ 180 stl_p(p++, 0x00000000); 181 182 /* Second part of the bootloader */ 183 p = (uint32_t *)(base + 0x040); 184 185 bl_gen_jump_kernel(&p, ENVP_VADDR - 64, 2, ENVP_VADDR, ENVP_VADDR + 8, 186 loaderparams.ram_size, kernel_addr); 187 } 188 189 static void main_cpu_reset(void *opaque) 190 { 191 MIPSCPU *cpu = opaque; 192 CPUMIPSState *env = &cpu->env; 193 194 cpu_reset(CPU(cpu)); 195 /* TODO: 2E reset stuff */ 196 if (loaderparams.kernel_filename) { 197 env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL)); 198 } 199 } 200 201 static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc, 202 I2CBus **i2c_bus) 203 { 204 PCIDevice *dev; 205 206 dev = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(slot, 0), true, 207 TYPE_VT82C686B_ISA); 208 qdev_connect_gpio_out(DEVICE(dev), 0, intc); 209 210 dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide"); 211 pci_ide_create_devs(dev); 212 213 pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci"); 214 pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci"); 215 216 dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 4), TYPE_VT82C686B_PM); 217 *i2c_bus = I2C_BUS(qdev_get_child_bus(DEVICE(dev), "i2c")); 218 219 /* Audio support */ 220 pci_create_simple(pci_bus, PCI_DEVFN(slot, 5), TYPE_VIA_AC97); 221 pci_create_simple(pci_bus, PCI_DEVFN(slot, 6), TYPE_VIA_MC97); 222 } 223 224 /* Network support */ 225 static void network_init(PCIBus *pci_bus) 226 { 227 int i; 228 229 for (i = 0; i < nb_nics; i++) { 230 NICInfo *nd = &nd_table[i]; 231 const char *default_devaddr = NULL; 232 233 if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) { 234 /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */ 235 default_devaddr = "07"; 236 } 237 238 pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr); 239 } 240 } 241 242 static void mips_fuloong2e_init(MachineState *machine) 243 { 244 const char *kernel_filename = machine->kernel_filename; 245 const char *kernel_cmdline = machine->kernel_cmdline; 246 const char *initrd_filename = machine->initrd_filename; 247 char *filename; 248 MemoryRegion *address_space_mem = get_system_memory(); 249 MemoryRegion *bios = g_new(MemoryRegion, 1); 250 long bios_size; 251 uint8_t *spd_data; 252 uint64_t kernel_entry; 253 PCIDevice *pci_dev; 254 PCIBus *pci_bus; 255 I2CBus *smbus; 256 Clock *cpuclk; 257 MIPSCPU *cpu; 258 CPUMIPSState *env; 259 DeviceState *dev; 260 261 cpuclk = clock_new(OBJECT(machine), "cpu-refclk"); 262 clock_set_hz(cpuclk, 533080000); /* ~533 MHz */ 263 264 /* init CPUs */ 265 cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk); 266 env = &cpu->env; 267 268 qemu_register_reset(main_cpu_reset, cpu); 269 270 /* TODO: support more than 256M RAM as highmem */ 271 if (machine->ram_size != 256 * MiB) { 272 error_report("Invalid RAM size, should be 256MB"); 273 exit(EXIT_FAILURE); 274 } 275 memory_region_add_subregion(address_space_mem, 0, machine->ram); 276 277 /* Boot ROM */ 278 memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE, 279 &error_fatal); 280 memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios); 281 282 /* 283 * We do not support flash operation, just loading pmon.bin as raw BIOS. 284 * Please use -L to set the BIOS path and -bios to set bios name. 285 */ 286 287 if (kernel_filename) { 288 loaderparams.ram_size = machine->ram_size; 289 loaderparams.kernel_filename = kernel_filename; 290 loaderparams.kernel_cmdline = kernel_cmdline; 291 loaderparams.initrd_filename = initrd_filename; 292 kernel_entry = load_kernel(cpu); 293 write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry); 294 } else { 295 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, 296 machine->firmware ?: FULOONG_BIOSNAME); 297 if (filename) { 298 bios_size = load_image_targphys(filename, 0x1fc00000LL, 299 BIOS_SIZE); 300 g_free(filename); 301 } else { 302 bios_size = -1; 303 } 304 305 if ((bios_size < 0 || bios_size > BIOS_SIZE) && 306 machine->firmware && !qtest_enabled()) { 307 error_report("Could not load MIPS bios '%s'", machine->firmware); 308 exit(1); 309 } 310 } 311 312 /* Init internal devices */ 313 cpu_mips_irq_init_cpu(cpu); 314 cpu_mips_clock_init(cpu); 315 316 /* North bridge, Bonito --> IP2 */ 317 pci_bus = bonito_init((qemu_irq *)&(env->irq[2])); 318 319 /* South bridge -> IP5 */ 320 vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5], 321 &smbus); 322 323 /* GPU */ 324 if (vga_interface_type != VGA_NONE) { 325 pci_dev = pci_new(-1, "ati-vga"); 326 dev = DEVICE(pci_dev); 327 qdev_prop_set_uint32(dev, "vgamem_mb", 16); 328 qdev_prop_set_uint16(dev, "x-device-id", 0x5159); 329 pci_realize_and_unref(pci_dev, pci_bus, &error_fatal); 330 } 331 332 /* Populate SPD eeprom data */ 333 spd_data = spd_data_generate(DDR, machine->ram_size); 334 smbus_eeprom_init_one(smbus, 0x50, spd_data); 335 336 /* Network card: RTL8139D */ 337 network_init(pci_bus); 338 } 339 340 static void mips_fuloong2e_machine_init(MachineClass *mc) 341 { 342 mc->desc = "Fuloong 2e mini pc"; 343 mc->init = mips_fuloong2e_init; 344 mc->block_default_type = IF_IDE; 345 mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E"); 346 mc->default_ram_size = 256 * MiB; 347 mc->default_ram_id = "fuloong2e.ram"; 348 mc->minimum_page_bits = 14; 349 } 350 351 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init) 352