LXR qemu/hw/mips/mips

   1/*
   2 * QEMU fulong 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 * Fulong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)
  15 * http://www.linux-mips.org/wiki/Fulong
  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/i386/pc.h"
  27#include "hw/dma/i8257.h"
  28#include "hw/isa/superio.h"
  29#include "net/net.h"
  30#include "hw/boards.h"
  31#include "hw/i2c/smbus_eeprom.h"
  32#include "hw/block/flash.h"
  33#include "hw/mips/mips.h"
  34#include "hw/mips/cpudevs.h"
  35#include "hw/pci/pci.h"
  36#include "audio/audio.h"
  37#include "qemu/log.h"
  38#include "hw/loader.h"
  39#include "hw/ide.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_FULONG2E_INIT
  50
  51#define ENVP_ADDR               0x80002000l
  52#define ENVP_NB_ENTRIES         16
  53#define ENVP_ENTRY_SIZE         256
  54
  55/* fulong 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 FULONG_BIOSNAME "pmon_fulong2e.bin"
  73
  74/* PCI SLOT in fulong 2e */
  75#define FULONG2E_VIA_SLOT        5
  76#define FULONG2E_ATI_SLOT        6
  77#define FULONG2E_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_low, 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,
 121                           (uint64_t *)&kernel_low, (uint64_t *)&kernel_high,
 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 = (kernel_high + ~INITRD_PAGE_MASK) &
 137                            INITRD_PAGE_MASK;
 138            if (initrd_offset + initrd_size > ram_size) {
 139                error_report("memory too small for initial ram disk '%s'",
 140                             loaderparams.initrd_filename);
 141                exit(1);
 142            }
 143            initrd_size = load_image_targphys(loaderparams.initrd_filename,
 144                                              initrd_offset,
 145                                              ram_size - initrd_offset);
 146        }
 147        if (initrd_size == (target_ulong) -1) {
 148            error_report("could not load initial ram disk '%s'",
 149                         loaderparams.initrd_filename);
 150            exit(1);
 151        }
 152    }
 153
 154    /* Setup prom parameters. */
 155    prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 156    prom_buf = g_malloc(prom_size);
 157
 158    prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 159    if (initrd_size > 0) {
 160        prom_set(prom_buf, index++,
 161                 "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
 162                 cpu_mips_phys_to_kseg0(NULL, initrd_offset),
 163                 initrd_size, loaderparams.kernel_cmdline);
 164    } else {
 165        prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 166    }
 167
 168    /* Setup minimum environment variables */
 169    prom_set(prom_buf, index++, "busclock=33000000");
 170    prom_set(prom_buf, index++, "cpuclock=100000000");
 171    prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
 172    prom_set(prom_buf, index++, "modetty0=38400n8r");
 173    prom_set(prom_buf, index++, NULL);
 174
 175    rom_add_blob_fixed("prom", prom_buf, prom_size,
 176                       cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 177
 178    g_free(prom_buf);
 179    return kernel_entry;
 180}
 181
 182static void write_bootloader(CPUMIPSState *env, uint8_t *base,
 183                             int64_t kernel_addr)
 184{
 185    uint32_t *p;
 186
 187    /* Small bootloader */
 188    p = (uint32_t *)base;
 189
 190    /* j 0x1fc00040 */
 191    stl_p(p++, 0x0bf00010);
 192    /* nop */
 193    stl_p(p++, 0x00000000);
 194
 195    /* Second part of the bootloader */
 196    p = (uint32_t *)(base + 0x040);
 197
 198    /* lui a0, 0 */
 199    stl_p(p++, 0x3c040000);
 200    /* ori a0, a0, 2 */
 201    stl_p(p++, 0x34840002);
 202    /* lui a1, high(ENVP_ADDR) */
 203    stl_p(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));
 204    /* ori a1, a0, low(ENVP_ADDR) */
 205    stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));
 206    /* lui a2, high(ENVP_ADDR + 8) */
 207    stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff));
 208    /* ori a2, a2, low(ENVP_ADDR + 8) */
 209    stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));
 210    /* lui a3, high(env->ram_size) */
 211    stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16));
 212    /* ori a3, a3, low(env->ram_size) */
 213    stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));
 214    /* lui ra, high(kernel_addr) */
 215    stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));
 216    /* ori ra, ra, low(kernel_addr) */
 217    stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff));
 218    /* jr ra */
 219    stl_p(p++, 0x03e00008);
 220    /* nop */
 221    stl_p(p++, 0x00000000);
 222}
 223
 224static void main_cpu_reset(void *opaque)
 225{
 226    MIPSCPU *cpu = opaque;
 227    CPUMIPSState *env = &cpu->env;
 228
 229    cpu_reset(CPU(cpu));
 230    /* TODO: 2E reset stuff */
 231    if (loaderparams.kernel_filename) {
 232        env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 233    }
 234}
 235
 236static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
 237                                       I2CBus **i2c_bus, ISABus **p_isa_bus)
 238{
 239    qemu_irq *i8259;
 240    ISABus *isa_bus;
 241    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 242
 243    isa_bus = vt82c686b_isa_init(pci_bus, PCI_DEVFN(slot, 0));
 244    if (!isa_bus) {
 245        fprintf(stderr, "vt82c686b_init error\n");
 246        exit(1);
 247    }
 248    *p_isa_bus = isa_bus;
 249    /* Interrupt controller */
 250    /* The 8259 -> IP5  */
 251    i8259 = i8259_init(isa_bus, intc);
 252    isa_bus_irqs(isa_bus, i8259);
 253    /* init other devices */
 254    i8254_pit_init(isa_bus, 0x40, 0, NULL);
 255    i8257_dma_init(isa_bus, 0);
 256    /* Super I/O */
 257    isa_create_simple(isa_bus, TYPE_VT82C686B_SUPERIO);
 258
 259    ide_drive_get(hd, ARRAY_SIZE(hd));
 260    via_ide_init(pci_bus, hd, PCI_DEVFN(slot, 1));
 261
 262    pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci");
 263    pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci");
 264
 265    *i2c_bus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(slot, 4), 0xeee1, NULL);
 266
 267    /* Audio support */
 268    vt82c686b_ac97_init(pci_bus, PCI_DEVFN(slot, 5));
 269    vt82c686b_mc97_init(pci_bus, PCI_DEVFN(slot, 6));
 270}
 271
 272/* Network support */
 273static void network_init(PCIBus *pci_bus)
 274{
 275    int i;
 276
 277    for (i = 0; i < nb_nics; i++) {
 278        NICInfo *nd = &nd_table[i];
 279        const char *default_devaddr = NULL;
 280
 281        if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 282            /* The fulong board has a RTL8139 card using PCI SLOT 7 */
 283            default_devaddr = "07";
 284        }
 285
 286        pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 287    }
 288}
 289
 290static void mips_fulong2e_init(MachineState *machine)
 291{
 292    const char *kernel_filename = machine->kernel_filename;
 293    const char *kernel_cmdline = machine->kernel_cmdline;
 294    const char *initrd_filename = machine->initrd_filename;
 295    char *filename;
 296    MemoryRegion *address_space_mem = get_system_memory();
 297    MemoryRegion *ram = g_new(MemoryRegion, 1);
 298    MemoryRegion *bios = g_new(MemoryRegion, 1);
 299    ram_addr_t ram_size = machine->ram_size;
 300    long bios_size;
 301    uint8_t *spd_data;
 302    Error *err = NULL;
 303    int64_t kernel_entry;
 304    PCIBus *pci_bus;
 305    ISABus *isa_bus;
 306    I2CBus *smbus;
 307    MIPSCPU *cpu;
 308    CPUMIPSState *env;
 309    DeviceState *dev;
 310
 311    /* init CPUs */
 312    cpu = MIPS_CPU(cpu_create(machine->cpu_type));
 313    env = &cpu->env;
 314
 315    qemu_register_reset(main_cpu_reset, cpu);
 316
 317    /* TODO: support more than 256M RAM as highmem */
 318    ram_size = 256 * MiB;
 319
 320    /* allocate RAM */
 321    memory_region_allocate_system_memory(ram, NULL, "fulong2e.ram", ram_size);
 322    memory_region_init_ram(bios, NULL, "fulong2e.bios", BIOS_SIZE,
 323                           &error_fatal);
 324    memory_region_set_readonly(bios, true);
 325
 326    memory_region_add_subregion(address_space_mem, 0, ram);
 327    memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 328
 329    /*
 330     * We do not support flash operation, just loading pmon.bin as raw BIOS.
 331     * Please use -L to set the BIOS path and -bios to set bios name.
 332     */
 333
 334    if (kernel_filename) {
 335        loaderparams.ram_size = ram_size;
 336        loaderparams.kernel_filename = kernel_filename;
 337        loaderparams.kernel_cmdline = kernel_cmdline;
 338        loaderparams.initrd_filename = initrd_filename;
 339        kernel_entry = load_kernel(env);
 340        write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 341    } else {
 342        if (bios_name == NULL) {
 343                bios_name = FULONG_BIOSNAME;
 344        }
 345        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 346        if (filename) {
 347            bios_size = load_image_targphys(filename, 0x1fc00000LL,
 348                                            BIOS_SIZE);
 349            g_free(filename);
 350        } else {
 351            bios_size = -1;
 352        }
 353
 354        if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 355            !kernel_filename && !qtest_enabled()) {
 356            error_report("Could not load MIPS bios '%s'", bios_name);
 357            exit(1);
 358        }
 359    }
 360
 361    /* Init internal devices */
 362    cpu_mips_irq_init_cpu(cpu);
 363    cpu_mips_clock_init(cpu);
 364
 365    /* North bridge, Bonito --> IP2 */
 366    pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 367
 368    /* South bridge -> IP5 */
 369    vt82c686b_southbridge_init(pci_bus, FULONG2E_VIA_SLOT, env->irq[5],
 370                               &smbus, &isa_bus);
 371
 372    /* GPU */
 373    if (vga_interface_type != VGA_NONE) {
 374        dev = DEVICE(pci_create(pci_bus, -1, "ati-vga"));
 375        qdev_prop_set_uint32(dev, "vgamem_mb", 16);
 376        qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
 377        qdev_init_nofail(dev);
 378    }
 379
 380    /* Populate SPD eeprom data */
 381    spd_data = spd_data_generate(DDR, ram_size, &err);
 382    if (err) {
 383        warn_report_err(err);
 384    }
 385    if (spd_data) {
 386        smbus_eeprom_init_one(smbus, 0x50, spd_data);
 387    }
 388
 389    mc146818_rtc_init(isa_bus, 2000, NULL);
 390
 391    /* Network card: RTL8139D */
 392    network_init(pci_bus);
 393}
 394
 395static void mips_fulong2e_machine_init(MachineClass *mc)
 396{
 397    mc->desc = "Fulong 2e mini pc";
 398    mc->init = mips_fulong2e_init;
 399    mc->block_default_type = IF_IDE;
 400    mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 401    mc->default_ram_size = 256 * MiB;
 402}
 403
 404DEFINE_MACHINE("fulong2e", mips_fulong2e_machine_init)
 405