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 "qapi/error.h"
  23#include "hw/hw.h"
  24#include "hw/i386/pc.h"
  25#include "hw/char/serial.h"
  26#include "hw/block/fdc.h"
  27#include "net/net.h"
  28#include "hw/boards.h"
  29#include "hw/i2c/smbus.h"
  30#include "sysemu/block-backend.h"
  31#include "hw/block/flash.h"
  32#include "hw/mips/mips.h"
  33#include "hw/mips/cpudevs.h"
  34#include "hw/pci/pci.h"
  35#include "sysemu/char.h"
  36#include "sysemu/sysemu.h"
  37#include "audio/audio.h"
  38#include "qemu/log.h"
  39#include "hw/loader.h"
  40#include "hw/mips/bios.h"
  41#include "hw/ide.h"
  42#include "elf.h"
  43#include "hw/isa/vt82c686.h"
  44#include "hw/timer/mc146818rtc.h"
  45#include "hw/timer/i8254.h"
  46#include "sysemu/blockdev.h"
  47#include "exec/address-spaces.h"
  48#include "sysemu/qtest.h"
  49#include "qemu/error-report.h"
  50
  51#define DEBUG_FULONG2E_INIT
  52
  53#define ENVP_ADDR       0x80002000l
  54#define ENVP_NB_ENTRIES         16
  55#define ENVP_ENTRY_SIZE         256
  56
  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 ISADevice *pit;
  80
  81static struct _loaderparams {
  82    int ram_size;
  83    const char *kernel_filename;
  84    const char *kernel_cmdline;
  85    const char *initrd_filename;
  86} loaderparams;
  87
  88static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t* prom_buf, int index,
  89                                        const char *string, ...)
  90{
  91    va_list ap;
  92    int32_t table_addr;
  93
  94    if (index >= ENVP_NB_ENTRIES)
  95        return;
  96
  97    if (string == NULL) {
  98        prom_buf[index] = 0;
  99        return;
 100    }
 101
 102    table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
 103    prom_buf[index] = tswap32(ENVP_ADDR + table_addr);
 104
 105    va_start(ap, string);
 106    vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
 107    va_end(ap);
 108}
 109
 110static int64_t load_kernel (CPUMIPSState *env)
 111{
 112    int64_t kernel_entry, kernel_low, kernel_high;
 113    int index = 0;
 114    long initrd_size;
 115    ram_addr_t initrd_offset;
 116    uint32_t *prom_buf;
 117    long prom_size;
 118
 119    if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,
 120                 (uint64_t *)&kernel_entry, (uint64_t *)&kernel_low,
 121                 (uint64_t *)&kernel_high, 0, EM_MIPS, 1, 0) < 0) {
 122        fprintf(stderr, "qemu: could not load kernel '%s'\n",
 123                loaderparams.kernel_filename);
 124        exit(1);
 125    }
 126
 127    /* load initrd */
 128    initrd_size = 0;
 129    initrd_offset = 0;
 130    if (loaderparams.initrd_filename) {
 131        initrd_size = get_image_size (loaderparams.initrd_filename);
 132        if (initrd_size > 0) {
 133            initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK;
 134            if (initrd_offset + initrd_size > ram_size) {
 135                fprintf(stderr,
 136                        "qemu: memory too small for initial ram disk '%s'\n",
 137                        loaderparams.initrd_filename);
 138                exit(1);
 139            }
 140            initrd_size = load_image_targphys(loaderparams.initrd_filename,
 141                                     initrd_offset, ram_size - initrd_offset);
 142        }
 143        if (initrd_size == (target_ulong) -1) {
 144            fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 145                    loaderparams.initrd_filename);
 146            exit(1);
 147        }
 148    }
 149
 150    /* Setup prom parameters. */
 151    prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 152    prom_buf = g_malloc(prom_size);
 153
 154    prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 155    if (initrd_size > 0) {
 156        prom_set(prom_buf, index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",
 157                 cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
 158                 loaderparams.kernel_cmdline);
 159    } else {
 160        prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 161    }
 162
 163    /* Setup minimum environment variables */
 164    prom_set(prom_buf, index++, "busclock=33000000");
 165    prom_set(prom_buf, index++, "cpuclock=100000000");
 166    prom_set(prom_buf, index++, "memsize=%i", loaderparams.ram_size/1024/1024);
 167    prom_set(prom_buf, index++, "modetty0=38400n8r");
 168    prom_set(prom_buf, index++, NULL);
 169
 170    rom_add_blob_fixed("prom", prom_buf, prom_size,
 171                       cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 172
 173    g_free(prom_buf);
 174    return kernel_entry;
 175}
 176
 177static void write_bootloader (CPUMIPSState *env, uint8_t *base, int64_t kernel_addr)
 178{
 179    uint32_t *p;
 180
 181    /* Small bootloader */
 182    p = (uint32_t *) base;
 183
 184    stl_p(p++, 0x0bf00010);                                      /* j 0x1fc00040 */
 185    stl_p(p++, 0x00000000);                                      /* nop */
 186
 187    /* Second part of the bootloader */
 188    p = (uint32_t *) (base + 0x040);
 189
 190    stl_p(p++, 0x3c040000);                                      /* lui a0, 0 */
 191    stl_p(p++, 0x34840002);                                      /* ori a0, a0, 2 */
 192    stl_p(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 193    stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a0, low(ENVP_ADDR) */
 194    stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 195    stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 196    stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16));      /* lui a3, high(env->ram_size) */
 197    stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));   /* ori a3, a3, low(env->ram_size) */
 198    stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));     /* lui ra, high(kernel_addr) */;
 199    stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff));             /* ori ra, ra, low(kernel_addr) */
 200    stl_p(p++, 0x03e00008);                                      /* jr ra */
 201    stl_p(p++, 0x00000000);                                      /* nop */
 202}
 203
 204
 205static void main_cpu_reset(void *opaque)
 206{
 207    MIPSCPU *cpu = opaque;
 208    CPUMIPSState *env = &cpu->env;
 209
 210    cpu_reset(CPU(cpu));
 211    /* TODO: 2E reset stuff */
 212    if (loaderparams.kernel_filename) {
 213        env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 214    }
 215}
 216
 217static const uint8_t eeprom_spd[0x80] = {
 218    0x80,0x08,0x07,0x0d,0x09,0x02,0x40,0x00,0x04,0x70,
 219    0x70,0x00,0x82,0x10,0x00,0x01,0x0e,0x04,0x0c,0x01,
 220    0x02,0x20,0x80,0x75,0x70,0x00,0x00,0x50,0x3c,0x50,
 221    0x2d,0x20,0xb0,0xb0,0x50,0x50,0x00,0x00,0x00,0x00,
 222    0x00,0x41,0x48,0x3c,0x32,0x75,0x00,0x00,0x00,0x00,
 223    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 224    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 225    0x00,0x00,0x00,0x9c,0x7b,0x07,0x00,0x00,0x00,0x00,
 226    0x00,0x00,0x00,0x00,0x48,0x42,0x35,0x34,0x41,0x32,
 227    0x35,0x36,0x38,0x4b,0x4e,0x2d,0x41,0x37,0x35,0x42,
 228    0x20,0x30,0x20
 229};
 230
 231/* Audio support */
 232static void audio_init (PCIBus *pci_bus)
 233{
 234    vt82c686b_ac97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 5));
 235    vt82c686b_mc97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 6));
 236}
 237
 238/* Network support */
 239static void network_init (PCIBus *pci_bus)
 240{
 241    int i;
 242
 243    for(i = 0; i < nb_nics; i++) {
 244        NICInfo *nd = &nd_table[i];
 245        const char *default_devaddr = NULL;
 246
 247        if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 248            /* The fulong board has a RTL8139 card using PCI SLOT 7 */
 249            default_devaddr = "07";
 250        }
 251
 252        pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 253    }
 254}
 255
 256static void mips_fulong2e_init(MachineState *machine)
 257{
 258    ram_addr_t ram_size = machine->ram_size;
 259    const char *cpu_model = machine->cpu_model;
 260    const char *kernel_filename = machine->kernel_filename;
 261    const char *kernel_cmdline = machine->kernel_cmdline;
 262    const char *initrd_filename = machine->initrd_filename;
 263    char *filename;
 264    MemoryRegion *address_space_mem = get_system_memory();
 265    MemoryRegion *ram = g_new(MemoryRegion, 1);
 266    MemoryRegion *bios = g_new(MemoryRegion, 1);
 267    long bios_size;
 268    int64_t kernel_entry;
 269    qemu_irq *i8259;
 270    PCIBus *pci_bus;
 271    ISABus *isa_bus;
 272    I2CBus *smbus;
 273    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 274    MIPSCPU *cpu;
 275    CPUMIPSState *env;
 276
 277    /* init CPUs */
 278    if (cpu_model == NULL) {
 279        cpu_model = "Loongson-2E";
 280    }
 281    cpu = cpu_mips_init(cpu_model);
 282    if (cpu == NULL) {
 283        fprintf(stderr, "Unable to find CPU definition\n");
 284        exit(1);
 285    }
 286    env = &cpu->env;
 287
 288    qemu_register_reset(main_cpu_reset, cpu);
 289
 290    /* fulong 2e has 256M ram. */
 291    ram_size = 256 * 1024 * 1024;
 292
 293    /* fulong 2e has a 1M flash.Winbond W39L040AP70Z */
 294    bios_size = 1024 * 1024;
 295
 296    /* allocate RAM */
 297    memory_region_allocate_system_memory(ram, NULL, "fulong2e.ram", ram_size);
 298    memory_region_init_ram(bios, NULL, "fulong2e.bios", bios_size,
 299                           &error_fatal);
 300    vmstate_register_ram_global(bios);
 301    memory_region_set_readonly(bios, true);
 302
 303    memory_region_add_subregion(address_space_mem, 0, ram);
 304    memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 305
 306    /* We do not support flash operation, just loading pmon.bin as raw BIOS.
 307     * Please use -L to set the BIOS path and -bios to set bios name. */
 308
 309    if (kernel_filename) {
 310        loaderparams.ram_size = ram_size;
 311        loaderparams.kernel_filename = kernel_filename;
 312        loaderparams.kernel_cmdline = kernel_cmdline;
 313        loaderparams.initrd_filename = initrd_filename;
 314        kernel_entry = load_kernel (env);
 315        write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 316    } else {
 317        if (bios_name == NULL) {
 318                bios_name = FULONG_BIOSNAME;
 319        }
 320        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 321        if (filename) {
 322            bios_size = load_image_targphys(filename, 0x1fc00000LL,
 323                                            BIOS_SIZE);
 324            g_free(filename);
 325        } else {
 326            bios_size = -1;
 327        }
 328
 329        if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 330            !kernel_filename && !qtest_enabled()) {
 331            error_report("Could not load MIPS bios '%s'", bios_name);
 332            exit(1);
 333        }
 334    }
 335
 336    /* Init internal devices */
 337    cpu_mips_irq_init_cpu(env);
 338    cpu_mips_clock_init(env);
 339
 340    /* North bridge, Bonito --> IP2 */
 341    pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 342
 343    /* South bridge */
 344    ide_drive_get(hd, ARRAY_SIZE(hd));
 345
 346    isa_bus = vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 0));
 347    if (!isa_bus) {
 348        fprintf(stderr, "vt82c686b_init error\n");
 349        exit(1);
 350    }
 351
 352    /* Interrupt controller */
 353    /* The 8259 -> IP5  */
 354    i8259 = i8259_init(isa_bus, env->irq[5]);
 355    isa_bus_irqs(isa_bus, i8259);
 356
 357    vt82c686b_ide_init(pci_bus, hd, PCI_DEVFN(FULONG2E_VIA_SLOT, 1));
 358    pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 2),
 359                      "vt82c686b-usb-uhci");
 360    pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 3),
 361                      "vt82c686b-usb-uhci");
 362
 363    smbus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 4),
 364                              0xeee1, NULL);
 365    /* TODO: Populate SPD eeprom data.  */
 366    smbus_eeprom_init(smbus, 1, eeprom_spd, sizeof(eeprom_spd));
 367
 368    /* init other devices */
 369    pit = pit_init(isa_bus, 0x40, 0, NULL);
 370    DMA_init(isa_bus, 0);
 371
 372    /* Super I/O */
 373    isa_create_simple(isa_bus, "i8042");
 374
 375    rtc_init(isa_bus, 2000, NULL);
 376
 377    serial_hds_isa_init(isa_bus, MAX_SERIAL_PORTS);
 378    parallel_hds_isa_init(isa_bus, 1);
 379
 380    /* Sound card */
 381    audio_init(pci_bus);
 382    /* Network card */
 383    network_init(pci_bus);
 384}
 385
 386static void mips_fulong2e_machine_init(MachineClass *mc)
 387{
 388    mc->desc = "Fulong 2e mini pc";
 389    mc->init = mips_fulong2e_init;
 390}
 391
 392DEFINE_MACHINE("fulong2e", mips_fulong2e_machine_init)
 393