hw/mips/fuloong2e.c

   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 "hw/intc/i8259.h"
  29 #include "hw/dma/i8257.h"
  30 #include "hw/isa/superio.h"
  31 #include "net/net.h"
  32 #include "hw/boards.h"
  33 #include "hw/i2c/smbus_eeprom.h"
  34 #include "hw/block/flash.h"
  35 #include "hw/mips/mips.h"
  36 #include "hw/mips/bootloader.h"
  37 #include "hw/mips/cpudevs.h"
  38 #include "hw/pci/pci.h"
  39 #include "qemu/log.h"
  40 #include "hw/loader.h"
  41 #include "hw/ide/pci.h"
  42 #include "elf.h"
  43 #include "hw/isa/vt82c686.h"
  44 #include "hw/rtc/mc146818rtc.h"
  45 #include "hw/timer/i8254.h"
  46 #include "exec/address-spaces.h"
  47 #include "sysemu/qtest.h"
  48 #include "sysemu/reset.h"
  49 #include "qemu/error-report.h"
  50
  51 #define ENVP_PADDR              0x2000
  52 #define ENVP_VADDR              cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR)
  53 #define ENVP_NB_ENTRIES         16
  54 #define ENVP_ENTRY_SIZE         256
  55
  56 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
  57 #define BIOS_SIZE               (512 * KiB)
  58 #define MAX_IDE_BUS             2
  59
  60 /*
  61  * PMON is not part of qemu and released with BSD license, anyone
  62  * who want to build a pmon binary please first git-clone the source
  63  * from the git repository at:
  64  * https://github.com/loongson-community/pmon
  65  */
  66 #define FULOONG_BIOSNAME "pmon_2e.bin"
  67
  68 /* PCI SLOT in Fuloong 2e */
  69 #define FULOONG2E_VIA_SLOT        5
  70 #define FULOONG2E_ATI_SLOT        6
  71 #define FULOONG2E_RTL8139_SLOT    7
  72
  73 static struct _loaderparams {
  74     int ram_size;
  75     const char *kernel_filename;
  76     const char *kernel_cmdline;
  77     const char *initrd_filename;
  78 } loaderparams;
  79
  80 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index,
  81                                         const char *string, ...)
  82 {
  83     va_list ap;
  84     int32_t table_addr;
  85
  86     if (index >= ENVP_NB_ENTRIES) {
  87         return;
  88     }
  89
  90     if (string == NULL) {
  91         prom_buf[index] = 0;
  92         return;
  93     }
  94
  95     table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
  96     prom_buf[index] = tswap32(ENVP_VADDR + table_addr);
  97
  98     va_start(ap, string);
  99     vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
 100     va_end(ap);
 101 }
 102
 103 static uint64_t load_kernel(MIPSCPU *cpu)
 104 {
 105     uint64_t kernel_entry, kernel_high, initrd_size;
 106     int index = 0;
 107     long kernel_size;
 108     ram_addr_t initrd_offset;
 109     uint32_t *prom_buf;
 110     long prom_size;
 111
 112     kernel_size = load_elf(loaderparams.kernel_filename, NULL,
 113                            cpu_mips_kseg0_to_phys, NULL,
 114                            &kernel_entry, NULL,
 115                            &kernel_high, NULL,
 116                            0, EM_MIPS, 1, 0);
 117     if (kernel_size < 0) {
 118         error_report("could not load kernel '%s': %s",
 119                      loaderparams.kernel_filename,
 120                      load_elf_strerror(kernel_size));
 121         exit(1);
 122     }
 123
 124     /* load initrd */
 125     initrd_size = 0;
 126     initrd_offset = 0;
 127     if (loaderparams.initrd_filename) {
 128         initrd_size = get_image_size(loaderparams.initrd_filename);
 129         if (initrd_size > 0) {
 130             initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
 131             if (initrd_offset + initrd_size > loaderparams.ram_size) {
 132                 error_report("memory too small for initial ram disk '%s'",
 133                              loaderparams.initrd_filename);
 134                 exit(1);
 135             }
 136             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 137                                               initrd_offset,
 138                                               loaderparams.ram_size - initrd_offset);
 139         }
 140         if (initrd_size == (target_ulong) -1) {
 141             error_report("could not load initial ram disk '%s'",
 142                          loaderparams.initrd_filename);
 143             exit(1);
 144         }
 145     }
 146
 147     /* Setup prom parameters. */
 148     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 149     prom_buf = g_malloc(prom_size);
 150
 151     prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 152     if (initrd_size > 0) {
 153         prom_set(prom_buf, index++,
 154                  "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
 155                  cpu_mips_phys_to_kseg0(NULL, initrd_offset),
 156                  initrd_size, loaderparams.kernel_cmdline);
 157     } else {
 158         prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 159     }
 160
 161     /* Setup minimum environment variables */
 162     prom_set(prom_buf, index++, "busclock=33000000");
 163     prom_set(prom_buf, index++, "cpuclock=%u", clock_get_hz(cpu->clock));
 164     prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
 165     prom_set(prom_buf, index++, NULL);
 166
 167     rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR);
 168
 169     g_free(prom_buf);
 170     return kernel_entry;
 171 }
 172
 173 static void write_bootloader(CPUMIPSState *env, uint8_t *base,
 174                              uint64_t kernel_addr)
 175 {
 176     uint32_t *p;
 177
 178     /* Small bootloader */
 179     p = (uint32_t *)base;
 180
 181     /* j 0x1fc00040 */
 182     stl_p(p++, 0x0bf00010);
 183     /* nop */
 184     stl_p(p++, 0x00000000);
 185
 186     /* Second part of the bootloader */
 187     p = (uint32_t *)(base + 0x040);
 188
 189     bl_gen_jump_kernel(&p, ENVP_VADDR - 64, 2, ENVP_VADDR, ENVP_VADDR + 8,
 190                        loaderparams.ram_size, kernel_addr);
 191 }
 192
 193 static void main_cpu_reset(void *opaque)
 194 {
 195     MIPSCPU *cpu = opaque;
 196     CPUMIPSState *env = &cpu->env;
 197
 198     cpu_reset(CPU(cpu));
 199     /* TODO: 2E reset stuff */
 200     if (loaderparams.kernel_filename) {
 201         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 202     }
 203 }
 204
 205 static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
 206                                        I2CBus **i2c_bus, ISABus **p_isa_bus)
 207 {
 208     qemu_irq *i8259;
 209     ISABus *isa_bus;
 210     PCIDevice *dev;
 211
 212     dev = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(slot, 0), true,
 213                                           TYPE_VT82C686B_ISA);
 214     isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(dev), "isa.0"));
 215     assert(isa_bus);
 216     *p_isa_bus = isa_bus;
 217     /* Interrupt controller */
 218     /* The 8259 -> IP5  */
 219     i8259 = i8259_init(isa_bus, intc);
 220     isa_bus_irqs(isa_bus, i8259);
 221     /* init other devices */
 222     i8254_pit_init(isa_bus, 0x40, 0, NULL);
 223     i8257_dma_init(isa_bus, 0);
 224     /* Super I/O */
 225     isa_create_simple(isa_bus, TYPE_VT82C686B_SUPERIO);
 226
 227     dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide");
 228     pci_ide_create_devs(dev);
 229
 230     pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci");
 231     pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci");
 232
 233     dev = pci_new(PCI_DEVFN(slot, 4), TYPE_VT82C686B_PM);
 234     qdev_prop_set_uint32(DEVICE(dev), "smb_io_base", 0xeee1);
 235     pci_realize_and_unref(dev, pci_bus, &error_fatal);
 236     *i2c_bus = I2C_BUS(qdev_get_child_bus(DEVICE(dev), "i2c"));
 237
 238     /* Audio support */
 239     pci_create_simple(pci_bus, PCI_DEVFN(slot, 5), TYPE_VIA_AC97);
 240     pci_create_simple(pci_bus, PCI_DEVFN(slot, 6), TYPE_VIA_MC97);
 241 }
 242
 243 /* Network support */
 244 static void network_init(PCIBus *pci_bus)
 245 {
 246     int i;
 247
 248     for (i = 0; i < nb_nics; i++) {
 249         NICInfo *nd = &nd_table[i];
 250         const char *default_devaddr = NULL;
 251
 252         if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 253             /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */
 254             default_devaddr = "07";
 255         }
 256
 257         pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 258     }
 259 }
 260
 261 static void mips_fuloong2e_init(MachineState *machine)
 262 {
 263     const char *kernel_filename = machine->kernel_filename;
 264     const char *kernel_cmdline = machine->kernel_cmdline;
 265     const char *initrd_filename = machine->initrd_filename;
 266     char *filename;
 267     MemoryRegion *address_space_mem = get_system_memory();
 268     MemoryRegion *bios = g_new(MemoryRegion, 1);
 269     long bios_size;
 270     uint8_t *spd_data;
 271     uint64_t kernel_entry;
 272     PCIDevice *pci_dev;
 273     PCIBus *pci_bus;
 274     ISABus *isa_bus;
 275     I2CBus *smbus;
 276     Clock *cpuclk;
 277     MIPSCPU *cpu;
 278     CPUMIPSState *env;
 279     DeviceState *dev;
 280
 281     cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
 282     clock_set_hz(cpuclk, 533080000); /* ~533 MHz */
 283
 284     /* init CPUs */
 285     cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
 286     env = &cpu->env;
 287
 288     qemu_register_reset(main_cpu_reset, cpu);
 289
 290     /* TODO: support more than 256M RAM as highmem */
 291     if (machine->ram_size != 256 * MiB) {
 292         error_report("Invalid RAM size, should be 256MB");
 293         exit(EXIT_FAILURE);
 294     }
 295     memory_region_add_subregion(address_space_mem, 0, machine->ram);
 296
 297     /* Boot ROM */
 298     memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
 299                            &error_fatal);
 300     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 301
 302     /*
 303      * We do not support flash operation, just loading pmon.bin as raw BIOS.
 304      * Please use -L to set the BIOS path and -bios to set bios name.
 305      */
 306
 307     if (kernel_filename) {
 308         loaderparams.ram_size = machine->ram_size;
 309         loaderparams.kernel_filename = kernel_filename;
 310         loaderparams.kernel_cmdline = kernel_cmdline;
 311         loaderparams.initrd_filename = initrd_filename;
 312         kernel_entry = load_kernel(cpu);
 313         write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 314     } else {
 315         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 316                                   machine->firmware ?: FULOONG_BIOSNAME);
 317         if (filename) {
 318             bios_size = load_image_targphys(filename, 0x1fc00000LL,
 319                                             BIOS_SIZE);
 320             g_free(filename);
 321         } else {
 322             bios_size = -1;
 323         }
 324
 325         if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 326             machine->firmware && !qtest_enabled()) {
 327             error_report("Could not load MIPS bios '%s'", machine->firmware);
 328             exit(1);
 329         }
 330     }
 331
 332     /* Init internal devices */
 333     cpu_mips_irq_init_cpu(cpu);
 334     cpu_mips_clock_init(cpu);
 335
 336     /* North bridge, Bonito --> IP2 */
 337     pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 338
 339     /* South bridge -> IP5 */
 340     vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5],
 341                                &smbus, &isa_bus);
 342
 343     /* GPU */
 344     if (vga_interface_type != VGA_NONE) {
 345         pci_dev = pci_new(-1, "ati-vga");
 346         dev = DEVICE(pci_dev);
 347         qdev_prop_set_uint32(dev, "vgamem_mb", 16);
 348         qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
 349         pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
 350     }
 351
 352     /* Populate SPD eeprom data */
 353     spd_data = spd_data_generate(DDR, machine->ram_size);
 354     smbus_eeprom_init_one(smbus, 0x50, spd_data);
 355
 356     mc146818_rtc_init(isa_bus, 2000, NULL);
 357
 358     /* Network card: RTL8139D */
 359     network_init(pci_bus);
 360 }
 361
 362 static void mips_fuloong2e_machine_init(MachineClass *mc)
 363 {
 364     mc->desc = "Fuloong 2e mini pc";
 365     mc->init = mips_fuloong2e_init;
 366     mc->block_default_type = IF_IDE;
 367     mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 368     mc->default_ram_size = 256 * MiB;
 369     mc->default_ram_id = "fuloong2e.ram";
 370     mc->minimum_page_bits = 14;
 371 }
 372
 373 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)