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