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