LXR qemu/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 user manual:
  18 * http://www.loongsondeveloper.com/doc/Loongson2EUserGuide.pdf
  19 */
  20
  21#include "qemu/osdep.h"
  22#include "qemu-common.h"
  23#include "qemu/units.h"
  24#include "qapi/error.h"
  25#include "cpu.h"
  26#include "hw/clock.h"
  27#include "hw/intc/i8259.h"
  28#include "hw/dma/i8257.h"
  29#include "hw/isa/superio.h"
  30#include "net/net.h"
  31#include "hw/boards.h"
  32#include "hw/i2c/smbus_eeprom.h"
  33#include "hw/block/flash.h"
  34#include "hw/mips/mips.h"
  35#include "hw/mips/cpudevs.h"
  36#include "hw/pci/pci.h"
  37#include "qemu/log.h"
  38#include "hw/loader.h"
  39#include "hw/ide/pci.h"
  40#include "elf.h"
  41#include "hw/isa/vt82c686.h"
  42#include "hw/rtc/mc146818rtc.h"
  43#include "hw/timer/i8254.h"
  44#include "exec/address-spaces.h"
  45#include "sysemu/qtest.h"
  46#include "sysemu/reset.h"
  47#include "qemu/error-report.h"
  48
  49#define DEBUG_FULOONG2E_INIT
  50
  51#define ENVP_ADDR               0x80002000l
  52#define ENVP_NB_ENTRIES         16
  53#define ENVP_ENTRY_SIZE         256
  54
  55/* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
  56#define BIOS_SIZE               (512 * KiB)
  57#define MAX_IDE_BUS             2
  58
  59/*
  60 * PMON is not part of qemu and released with BSD license, anyone
  61 * who want to build a pmon binary please first git-clone the source
  62 * from the git repository at:
  63 * http://www.loongson.cn/support/git/pmon
  64 * Then follow the "Compile Guide" available at:
  65 * http://dev.lemote.com/code/pmon
  66 *
  67 * Notes:
  68 * 1, don't use the source at http://dev.lemote.com/http_git/pmon.git
  69 * 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"
  70 * in the "Compile Guide".
  71 */
  72#define FULOONG_BIOSNAME "pmon_2e.bin"
  73
  74/* PCI SLOT in Fuloong 2e */
  75#define FULOONG2E_VIA_SLOT        5
  76#define FULOONG2E_ATI_SLOT        6
  77#define FULOONG2E_RTL8139_SLOT    7
  78
  79static struct _loaderparams {
  80    int ram_size;
  81    const char *kernel_filename;
  82    const char *kernel_cmdline;
  83    const char *initrd_filename;
  84} loaderparams;
  85
  86static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index,
  87                                        const char *string, ...)
  88{
  89    va_list ap;
  90    int32_t table_addr;
  91
  92    if (index >= ENVP_NB_ENTRIES) {
  93        return;
  94    }
  95
  96    if (string == NULL) {
  97        prom_buf[index] = 0;
  98        return;
  99    }
 100
 101    table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
 102    prom_buf[index] = tswap32(ENVP_ADDR + table_addr);
 103
 104    va_start(ap, string);
 105    vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
 106    va_end(ap);
 107}
 108
 109static int64_t load_kernel(CPUMIPSState *env)
 110{
 111    int64_t kernel_entry, kernel_high, initrd_size;
 112    int index = 0;
 113    long kernel_size;
 114    ram_addr_t initrd_offset;
 115    uint32_t *prom_buf;
 116    long prom_size;
 117
 118    kernel_size = load_elf(loaderparams.kernel_filename, NULL,
 119                           cpu_mips_kseg0_to_phys, NULL,
 120                           (uint64_t *)&kernel_entry, NULL,
 121                           (uint64_t *)&kernel_high, NULL,
 122                           0, EM_MIPS, 1, 0);
 123    if (kernel_size < 0) {
 124        error_report("could not load kernel '%s': %s",
 125                     loaderparams.kernel_filename,
 126                     load_elf_strerror(kernel_size));
 127        exit(1);
 128    }
 129
 130    /* load initrd */
 131    initrd_size = 0;
 132    initrd_offset = 0;
 133    if (loaderparams.initrd_filename) {
 134        initrd_size = get_image_size(loaderparams.initrd_filename);
 135        if (initrd_size > 0) {
 136            initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
 137            if (initrd_offset + initrd_size > ram_size) {
 138                error_report("memory too small for initial ram disk '%s'",
 139                             loaderparams.initrd_filename);
 140                exit(1);
 141            }
 142            initrd_size = load_image_targphys(loaderparams.initrd_filename,
 143                                              initrd_offset,
 144                                              ram_size - initrd_offset);
 145        }
 146        if (initrd_size == (target_ulong) -1) {
 147            error_report("could not load initial ram disk '%s'",
 148                         loaderparams.initrd_filename);
 149            exit(1);
 150        }
 151    }
 152
 153    /* Setup prom parameters. */
 154    prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 155    prom_buf = g_malloc(prom_size);
 156
 157    prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 158    if (initrd_size > 0) {
 159        prom_set(prom_buf, index++,
 160                 "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
 161                 cpu_mips_phys_to_kseg0(NULL, initrd_offset),
 162                 initrd_size, loaderparams.kernel_cmdline);
 163    } else {
 164        prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 165    }
 166
 167    /* Setup minimum environment variables */
 168    prom_set(prom_buf, index++, "busclock=33000000");
 169    prom_set(prom_buf, index++, "cpuclock=100000000");
 170    prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
 171    prom_set(prom_buf, index++, "modetty0=38400n8r");
 172    prom_set(prom_buf, index++, NULL);
 173
 174    rom_add_blob_fixed("prom", prom_buf, prom_size,
 175                       cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 176
 177    g_free(prom_buf);
 178    return kernel_entry;
 179}
 180
 181static void write_bootloader(CPUMIPSState *env, uint8_t *base,
 182                             int64_t kernel_addr)
 183{
 184    uint32_t *p;
 185
 186    /* Small bootloader */
 187    p = (uint32_t *)base;
 188
 189    /* j 0x1fc00040 */
 190    stl_p(p++, 0x0bf00010);
 191    /* nop */
 192    stl_p(p++, 0x00000000);
 193
 194    /* Second part of the bootloader */
 195    p = (uint32_t *)(base + 0x040);
 196
 197    /* lui a0, 0 */
 198    stl_p(p++, 0x3c040000);
 199    /* ori a0, a0, 2 */
 200    stl_p(p++, 0x34840002);
 201    /* lui a1, high(ENVP_ADDR) */
 202    stl_p(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));
 203    /* ori a1, a0, low(ENVP_ADDR) */
 204    stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));
 205    /* lui a2, high(ENVP_ADDR + 8) */
 206    stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff));
 207    /* ori a2, a2, low(ENVP_ADDR + 8) */
 208    stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));
 209    /* lui a3, high(env->ram_size) */
 210    stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16));
 211    /* ori a3, a3, low(env->ram_size) */
 212    stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));
 213    /* lui ra, high(kernel_addr) */
 214    stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));
 215    /* ori ra, ra, low(kernel_addr) */
 216    stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff));
 217    /* jr ra */
 218    stl_p(p++, 0x03e00008);
 219    /* nop */
 220    stl_p(p++, 0x00000000);
 221}
 222
 223static void main_cpu_reset(void *opaque)
 224{
 225    MIPSCPU *cpu = opaque;
 226    CPUMIPSState *env = &cpu->env;
 227
 228    cpu_reset(CPU(cpu));
 229    /* TODO: 2E reset stuff */
 230    if (loaderparams.kernel_filename) {
 231        env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 232    }
 233}
 234
 235static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
 236                                       I2CBus **i2c_bus, ISABus **p_isa_bus)
 237{
 238    qemu_irq *i8259;
 239    ISABus *isa_bus;
 240    PCIDevice *dev;
 241
 242    isa_bus = vt82c686b_isa_init(pci_bus, PCI_DEVFN(slot, 0));
 243    assert(isa_bus);
 244    *p_isa_bus = isa_bus;
 245    /* Interrupt controller */
 246    /* The 8259 -> IP5  */
 247    i8259 = i8259_init(isa_bus, intc);
 248    isa_bus_irqs(isa_bus, i8259);
 249    /* init other devices */
 250    i8254_pit_init(isa_bus, 0x40, 0, NULL);
 251    i8257_dma_init(isa_bus, 0);
 252    /* Super I/O */
 253    isa_create_simple(isa_bus, TYPE_VT82C686B_SUPERIO);
 254
 255    dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide");
 256    pci_ide_create_devs(dev);
 257
 258    pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci");
 259    pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci");
 260
 261    *i2c_bus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(slot, 4), 0xeee1, NULL);
 262
 263    /* Audio support */
 264    vt82c686b_ac97_init(pci_bus, PCI_DEVFN(slot, 5));
 265    vt82c686b_mc97_init(pci_bus, PCI_DEVFN(slot, 6));
 266}
 267
 268/* Network support */
 269static void network_init(PCIBus *pci_bus)
 270{
 271    int i;
 272
 273    for (i = 0; i < nb_nics; i++) {
 274        NICInfo *nd = &nd_table[i];
 275        const char *default_devaddr = NULL;
 276
 277        if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 278            /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */
 279            default_devaddr = "07";
 280        }
 281
 282        pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 283    }
 284}
 285
 286static void mips_fuloong2e_init(MachineState *machine)
 287{
 288    const char *kernel_filename = machine->kernel_filename;
 289    const char *kernel_cmdline = machine->kernel_cmdline;
 290    const char *initrd_filename = machine->initrd_filename;
 291    char *filename;
 292    MemoryRegion *address_space_mem = get_system_memory();
 293    MemoryRegion *bios = g_new(MemoryRegion, 1);
 294    long bios_size;
 295    uint8_t *spd_data;
 296    int64_t kernel_entry;
 297    PCIDevice *pci_dev;
 298    PCIBus *pci_bus;
 299    ISABus *isa_bus;
 300    I2CBus *smbus;
 301    Clock *cpuclk;
 302    MIPSCPU *cpu;
 303    CPUMIPSState *env;
 304    DeviceState *dev;
 305
 306    cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
 307    clock_set_hz(cpuclk, 533080000); /* ~533 MHz */
 308
 309    /* init CPUs */
 310    cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
 311    env = &cpu->env;
 312
 313    qemu_register_reset(main_cpu_reset, cpu);
 314
 315    /* TODO: support more than 256M RAM as highmem */
 316    if (machine->ram_size != 256 * MiB) {
 317        error_report("Invalid RAM size, should be 256MB");
 318        exit(EXIT_FAILURE);
 319    }
 320    memory_region_add_subregion(address_space_mem, 0, machine->ram);
 321
 322    /* Boot ROM */
 323    memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
 324                           &error_fatal);
 325    memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 326
 327    /*
 328     * We do not support flash operation, just loading pmon.bin as raw BIOS.
 329     * Please use -L to set the BIOS path and -bios to set bios name.
 330     */
 331
 332    if (kernel_filename) {
 333        loaderparams.ram_size = machine->ram_size;
 334        loaderparams.kernel_filename = kernel_filename;
 335        loaderparams.kernel_cmdline = kernel_cmdline;
 336        loaderparams.initrd_filename = initrd_filename;
 337        kernel_entry = load_kernel(env);
 338        write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 339    } else {
 340        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 341                                  bios_name ?: FULOONG_BIOSNAME);
 342        if (filename) {
 343            bios_size = load_image_targphys(filename, 0x1fc00000LL,
 344                                            BIOS_SIZE);
 345            g_free(filename);
 346        } else {
 347            bios_size = -1;
 348        }
 349
 350        if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 351            bios_name && !qtest_enabled()) {
 352            error_report("Could not load MIPS bios '%s'", bios_name);
 353            exit(1);
 354        }
 355    }
 356
 357    /* Init internal devices */
 358    cpu_mips_irq_init_cpu(cpu);
 359    cpu_mips_clock_init(cpu);
 360
 361    /* North bridge, Bonito --> IP2 */
 362    pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 363
 364    /* South bridge -> IP5 */
 365    vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5],
 366                               &smbus, &isa_bus);
 367
 368    /* GPU */
 369    if (vga_interface_type != VGA_NONE) {
 370        pci_dev = pci_new(-1, "ati-vga");
 371        dev = DEVICE(pci_dev);
 372        qdev_prop_set_uint32(dev, "vgamem_mb", 16);
 373        qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
 374        pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
 375    }
 376
 377    /* Populate SPD eeprom data */
 378    spd_data = spd_data_generate(DDR, machine->ram_size);
 379    smbus_eeprom_init_one(smbus, 0x50, spd_data);
 380
 381    mc146818_rtc_init(isa_bus, 2000, NULL);
 382
 383    /* Network card: RTL8139D */
 384    network_init(pci_bus);
 385}
 386
 387static void mips_fuloong2e_machine_init(MachineClass *mc)
 388{
 389    mc->desc = "Fuloong 2e mini pc";
 390    mc->alias = "fulong2e";             /* Incorrect name used up to QEMU 4.2 */
 391    mc->init = mips_fuloong2e_init;
 392    mc->block_default_type = IF_IDE;
 393    mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 394    mc->default_ram_size = 256 * MiB;
 395    mc->default_ram_id = "fuloong2e.ram";
 396    mc->minimum_page_bits = 14;
 397}
 398
 399DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)
 400