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 "qemu/log.h" 37 #include "hw/loader.h" 38 #include "hw/ide/pci.h" 39 #include "hw/qdev-properties.h" 40 #include "elf.h" 41 #include "hw/isa/vt82c686.h" 42 #include "exec/address-spaces.h" 43 #include "sysemu/qtest.h" 44 #include "sysemu/reset.h" 45 #include "sysemu/sysemu.h" 46 #include "qemu/error-report.h" 47 48 #define ENVP_PADDR 0x2000 49 #define ENVP_VADDR cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR) 50 #define ENVP_NB_ENTRIES 16 51 #define ENVP_ENTRY_SIZE 256 52 53 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */ 54 #define BIOS_SIZE (512 * KiB) 55 #define MAX_IDE_BUS 2 56 57 /* 58 * PMON is not part of qemu and released with BSD license, anyone 59 * who want to build a pmon binary please first git-clone the source 60 * from the git repository at: 61 * https://github.com/loongson-community/pmon 62 */ 63 #define FULOONG_BIOSNAME "pmon_2e.bin" 64 65 /* PCI SLOT in Fuloong 2e */ 66 #define FULOONG2E_VIA_SLOT 5 67 #define FULOONG2E_ATI_SLOT 6 68 #define FULOONG2E_RTL8139_SLOT 7 69 70 static struct _loaderparams { 71 int ram_size; 72 const char *kernel_filename; 73 const char *kernel_cmdline; 74 const char *initrd_filename; 75 } loaderparams; 76 77 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index, 78 const char *string, ...) 79 { 80 va_list ap; 81 int32_t table_addr; 82 83 if (index >= ENVP_NB_ENTRIES) { 84 return; 85 } 86 87 if (string == NULL) { 88 prom_buf[index] = 0; 89 return; 90 } 91 92 table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE; 93 prom_buf[index] = tswap32(ENVP_VADDR + table_addr); 94 95 va_start(ap, string); 96 vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap); 97 va_end(ap); 98 } 99 100 static uint64_t load_kernel(MIPSCPU *cpu) 101 { 102 uint64_t kernel_entry, kernel_high, initrd_size; 103 int index = 0; 104 long kernel_size; 105 ram_addr_t initrd_offset; 106 uint32_t *prom_buf; 107 long prom_size; 108 109 kernel_size = load_elf(loaderparams.kernel_filename, NULL, 110 cpu_mips_kseg0_to_phys, NULL, 111 &kernel_entry, NULL, 112 &kernel_high, NULL, 113 0, EM_MIPS, 1, 0); 114 if (kernel_size < 0) { 115 error_report("could not load kernel '%s': %s", 116 loaderparams.kernel_filename, 117 load_elf_strerror(kernel_size)); 118 exit(1); 119 } 120 121 /* load initrd */ 122 initrd_size = 0; 123 initrd_offset = 0; 124 if (loaderparams.initrd_filename) { 125 initrd_size = get_image_size(loaderparams.initrd_filename); 126 if (initrd_size > 0) { 127 initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE); 128 if (initrd_offset + initrd_size > loaderparams.ram_size) { 129 error_report("memory too small for initial ram disk '%s'", 130 loaderparams.initrd_filename); 131 exit(1); 132 } 133 initrd_size = load_image_targphys(loaderparams.initrd_filename, 134 initrd_offset, 135 loaderparams.ram_size - initrd_offset); 136 } 137 if (initrd_size == (target_ulong) -1) { 138 error_report("could not load initial ram disk '%s'", 139 loaderparams.initrd_filename); 140 exit(1); 141 } 142 } 143 144 /* Setup prom parameters. */ 145 prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE); 146 prom_buf = g_malloc(prom_size); 147 148 prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename); 149 if (initrd_size > 0) { 150 prom_set(prom_buf, index++, 151 "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s", 152 cpu_mips_phys_to_kseg0(NULL, initrd_offset), 153 initrd_size, loaderparams.kernel_cmdline); 154 } else { 155 prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline); 156 } 157 158 /* Setup minimum environment variables */ 159 prom_set(prom_buf, index++, "busclock=33000000"); 160 prom_set(prom_buf, index++, "cpuclock=%u", clock_get_hz(cpu->clock)); 161 prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB); 162 prom_set(prom_buf, index++, NULL); 163 164 rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR); 165 166 g_free(prom_buf); 167 return kernel_entry; 168 } 169 170 static void write_bootloader(CPUMIPSState *env, uint8_t *base, 171 uint64_t kernel_addr) 172 { 173 uint32_t *p; 174 175 /* Small bootloader */ 176 p = (uint32_t *)base; 177 178 /* j 0x1fc00040 */ 179 stl_p(p++, 0x0bf00010); 180 /* nop */ 181 stl_p(p++, 0x00000000); 182 183 /* Second part of the bootloader */ 184 p = (uint32_t *)(base + 0x040); 185 186 bl_gen_jump_kernel(&p, ENVP_VADDR - 64, 2, ENVP_VADDR, ENVP_VADDR + 8, 187 loaderparams.ram_size, kernel_addr); 188 } 189 190 static void main_cpu_reset(void *opaque) 191 { 192 MIPSCPU *cpu = opaque; 193 CPUMIPSState *env = &cpu->env; 194 195 cpu_reset(CPU(cpu)); 196 /* TODO: 2E reset stuff */ 197 if (loaderparams.kernel_filename) { 198 env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL)); 199 } 200 } 201 202 static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc, 203 I2CBus **i2c_bus) 204 { 205 PCIDevice *dev; 206 207 dev = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(slot, 0), true, 208 TYPE_VT82C686B_ISA); 209 qdev_connect_gpio_out(DEVICE(dev), 0, intc); 210 211 dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide"); 212 pci_ide_create_devs(dev); 213 214 pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci"); 215 pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci"); 216 217 dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 4), TYPE_VT82C686B_PM); 218 *i2c_bus = I2C_BUS(qdev_get_child_bus(DEVICE(dev), "i2c")); 219 220 /* Audio support */ 221 pci_create_simple(pci_bus, PCI_DEVFN(slot, 5), TYPE_VIA_AC97); 222 pci_create_simple(pci_bus, PCI_DEVFN(slot, 6), TYPE_VIA_MC97); 223 } 224 225 /* Network support */ 226 static void network_init(PCIBus *pci_bus) 227 { 228 int i; 229 230 for (i = 0; i < nb_nics; i++) { 231 NICInfo *nd = &nd_table[i]; 232 const char *default_devaddr = NULL; 233 234 if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) { 235 /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */ 236 default_devaddr = "07"; 237 } 238 239 pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr); 240 } 241 } 242 243 static void mips_fuloong2e_init(MachineState *machine) 244 { 245 const char *kernel_filename = machine->kernel_filename; 246 const char *kernel_cmdline = machine->kernel_cmdline; 247 const char *initrd_filename = machine->initrd_filename; 248 char *filename; 249 MemoryRegion *address_space_mem = get_system_memory(); 250 MemoryRegion *bios = g_new(MemoryRegion, 1); 251 long bios_size; 252 uint8_t *spd_data; 253 uint64_t kernel_entry; 254 PCIDevice *pci_dev; 255 PCIBus *pci_bus; 256 I2CBus *smbus; 257 Clock *cpuclk; 258 MIPSCPU *cpu; 259 CPUMIPSState *env; 260 DeviceState *dev; 261 262 cpuclk = clock_new(OBJECT(machine), "cpu-refclk"); 263 clock_set_hz(cpuclk, 533080000); /* ~533 MHz */ 264 265 /* init CPUs */ 266 cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk); 267 env = &cpu->env; 268 269 qemu_register_reset(main_cpu_reset, cpu); 270 271 /* TODO: support more than 256M RAM as highmem */ 272 if (machine->ram_size != 256 * MiB) { 273 error_report("Invalid RAM size, should be 256MB"); 274 exit(EXIT_FAILURE); 275 } 276 memory_region_add_subregion(address_space_mem, 0, machine->ram); 277 278 /* Boot ROM */ 279 memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE, 280 &error_fatal); 281 memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios); 282 283 /* 284 * We do not support flash operation, just loading pmon.bin as raw BIOS. 285 * Please use -L to set the BIOS path and -bios to set bios name. 286 */ 287 288 if (kernel_filename) { 289 loaderparams.ram_size = machine->ram_size; 290 loaderparams.kernel_filename = kernel_filename; 291 loaderparams.kernel_cmdline = kernel_cmdline; 292 loaderparams.initrd_filename = initrd_filename; 293 kernel_entry = load_kernel(cpu); 294 write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry); 295 } else { 296 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, 297 machine->firmware ?: FULOONG_BIOSNAME); 298 if (filename) { 299 bios_size = load_image_targphys(filename, 0x1fc00000LL, 300 BIOS_SIZE); 301 g_free(filename); 302 } else { 303 bios_size = -1; 304 } 305 306 if ((bios_size < 0 || bios_size > BIOS_SIZE) && 307 machine->firmware && !qtest_enabled()) { 308 error_report("Could not load MIPS bios '%s'", machine->firmware); 309 exit(1); 310 } 311 } 312 313 /* Init internal devices */ 314 cpu_mips_irq_init_cpu(cpu); 315 cpu_mips_clock_init(cpu); 316 317 /* North bridge, Bonito --> IP2 */ 318 pci_bus = bonito_init((qemu_irq *)&(env->irq[2])); 319 320 /* South bridge -> IP5 */ 321 vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5], 322 &smbus); 323 324 /* GPU */ 325 if (vga_interface_type != VGA_NONE) { 326 pci_dev = pci_new(-1, "ati-vga"); 327 dev = DEVICE(pci_dev); 328 qdev_prop_set_uint32(dev, "vgamem_mb", 16); 329 qdev_prop_set_uint16(dev, "x-device-id", 0x5159); 330 pci_realize_and_unref(pci_dev, pci_bus, &error_fatal); 331 } 332 333 /* Populate SPD eeprom data */ 334 spd_data = spd_data_generate(DDR, machine->ram_size); 335 smbus_eeprom_init_one(smbus, 0x50, spd_data); 336 337 /* Network card: RTL8139D */ 338 network_init(pci_bus); 339 } 340 341 static void mips_fuloong2e_machine_init(MachineClass *mc) 342 { 343 mc->desc = "Fuloong 2e mini pc"; 344 mc->init = mips_fuloong2e_init; 345 mc->block_default_type = IF_IDE; 346 mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E"); 347 mc->default_ram_size = 256 * MiB; 348 mc->default_ram_id = "fuloong2e.ram"; 349 mc->minimum_page_bits = 14; 350 } 351 352 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init) 353