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/sysemu.h"
  36#include "audio/audio.h"
  37#include "qemu/log.h"
  38#include "hw/loader.h"
  39#include "hw/mips/bios.h"
  40#include "hw/ide.h"
  41#include "elf.h"
  42#include "hw/isa/vt82c686.h"
  43#include "hw/timer/mc146818rtc.h"
  44#include "hw/timer/i8254.h"
  45#include "sysemu/blockdev.h"
  46#include "exec/address-spaces.h"
  47#include "sysemu/qtest.h"
  48#include "qemu/error-report.h"
  49
  50#define DEBUG_FULONG2E_INIT
  51
  52#define ENVP_ADDR       0x80002000l
  53#define ENVP_NB_ENTRIES         16
  54#define ENVP_ENTRY_SIZE         256
  55
  56#define MAX_IDE_BUS 2
  57
  58/*
  59 * PMON is not part of qemu and released with BSD license, anyone
  60 * who want to build a pmon binary please first git-clone the source
  61 * from the git repository at:
  62 * http://www.loongson.cn/support/git/pmon
  63 * Then follow the "Compile Guide" available at:
  64 * http://dev.lemote.com/code/pmon
  65 *
  66 * Notes:
  67 * 1, don't use the source at http://dev.lemote.com/http_git/pmon.git
  68 * 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"
  69 * in the "Compile Guide".
  70 */
  71#define FULONG_BIOSNAME "pmon_fulong2e.bin"
  72
  73/* PCI SLOT in fulong 2e */
  74#define FULONG2E_VIA_SLOT        5
  75#define FULONG2E_ATI_SLOT        6
  76#define FULONG2E_RTL8139_SLOT    7
  77
  78static ISADevice *pit;
  79
  80static struct _loaderparams {
  81    int ram_size;
  82    const char *kernel_filename;
  83    const char *kernel_cmdline;
  84    const char *initrd_filename;
  85} loaderparams;
  86
  87static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t* prom_buf, int index,
  88                                        const char *string, ...)
  89{
  90    va_list ap;
  91    int32_t table_addr;
  92
  93    if (index >= ENVP_NB_ENTRIES)
  94        return;
  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;
 112    int index = 0;
 113    long kernel_size, initrd_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, cpu_mips_kseg0_to_phys,
 119                           NULL, (uint64_t *)&kernel_entry,
 120                           (uint64_t *)&kernel_low, (uint64_t *)&kernel_high,
 121                           0, EM_MIPS, 1, 0);
 122    if (kernel_size < 0) {
 123        error_report("qemu: could not load kernel '%s': %s",
 124                     loaderparams.kernel_filename,
 125                     load_elf_strerror(kernel_size));
 126        exit(1);
 127    }
 128
 129    /* load initrd */
 130    initrd_size = 0;
 131    initrd_offset = 0;
 132    if (loaderparams.initrd_filename) {
 133        initrd_size = get_image_size (loaderparams.initrd_filename);
 134        if (initrd_size > 0) {
 135            initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK;
 136            if (initrd_offset + initrd_size > ram_size) {
 137                fprintf(stderr,
 138                        "qemu: memory too small for initial ram disk '%s'\n",
 139                        loaderparams.initrd_filename);
 140                exit(1);
 141            }
 142            initrd_size = load_image_targphys(loaderparams.initrd_filename,
 143                                     initrd_offset, ram_size - initrd_offset);
 144        }
 145        if (initrd_size == (target_ulong) -1) {
 146            fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 147                    loaderparams.initrd_filename);
 148            exit(1);
 149        }
 150    }
 151
 152    /* Setup prom parameters. */
 153    prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 154    prom_buf = g_malloc(prom_size);
 155
 156    prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 157    if (initrd_size > 0) {
 158        prom_set(prom_buf, index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",
 159                 cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
 160                 loaderparams.kernel_cmdline);
 161    } else {
 162        prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 163    }
 164
 165    /* Setup minimum environment variables */
 166    prom_set(prom_buf, index++, "busclock=33000000");
 167    prom_set(prom_buf, index++, "cpuclock=100000000");
 168    prom_set(prom_buf, index++, "memsize=%i", loaderparams.ram_size/1024/1024);
 169    prom_set(prom_buf, index++, "modetty0=38400n8r");
 170    prom_set(prom_buf, index++, NULL);
 171
 172    rom_add_blob_fixed("prom", prom_buf, prom_size,
 173                       cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 174
 175    g_free(prom_buf);
 176    return kernel_entry;
 177}
 178
 179static void write_bootloader (CPUMIPSState *env, uint8_t *base, int64_t kernel_addr)
 180{
 181    uint32_t *p;
 182
 183    /* Small bootloader */
 184    p = (uint32_t *) base;
 185
 186    stl_p(p++, 0x0bf00010);                                      /* j 0x1fc00040 */
 187    stl_p(p++, 0x00000000);                                      /* nop */
 188
 189    /* Second part of the bootloader */
 190    p = (uint32_t *) (base + 0x040);
 191
 192    stl_p(p++, 0x3c040000);                                      /* lui a0, 0 */
 193    stl_p(p++, 0x34840002);                                      /* ori a0, a0, 2 */
 194    stl_p(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 195    stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a0, low(ENVP_ADDR) */
 196    stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 197    stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 198    stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16));      /* lui a3, high(env->ram_size) */
 199    stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));   /* ori a3, a3, low(env->ram_size) */
 200    stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));     /* lui ra, high(kernel_addr) */;
 201    stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff));             /* ori ra, ra, low(kernel_addr) */
 202    stl_p(p++, 0x03e00008);                                      /* jr ra */
 203    stl_p(p++, 0x00000000);                                      /* nop */
 204}
 205
 206
 207static void main_cpu_reset(void *opaque)
 208{
 209    MIPSCPU *cpu = opaque;
 210    CPUMIPSState *env = &cpu->env;
 211
 212    cpu_reset(CPU(cpu));
 213    /* TODO: 2E reset stuff */
 214    if (loaderparams.kernel_filename) {
 215        env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 216    }
 217}
 218
 219static const uint8_t eeprom_spd[0x80] = {
 220    0x80,0x08,0x07,0x0d,0x09,0x02,0x40,0x00,0x04,0x70,
 221    0x70,0x00,0x82,0x10,0x00,0x01,0x0e,0x04,0x0c,0x01,
 222    0x02,0x20,0x80,0x75,0x70,0x00,0x00,0x50,0x3c,0x50,
 223    0x2d,0x20,0xb0,0xb0,0x50,0x50,0x00,0x00,0x00,0x00,
 224    0x00,0x41,0x48,0x3c,0x32,0x75,0x00,0x00,0x00,0x00,
 225    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 226    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 227    0x00,0x00,0x00,0x9c,0x7b,0x07,0x00,0x00,0x00,0x00,
 228    0x00,0x00,0x00,0x00,0x48,0x42,0x35,0x34,0x41,0x32,
 229    0x35,0x36,0x38,0x4b,0x4e,0x2d,0x41,0x37,0x35,0x42,
 230    0x20,0x30,0x20
 231};
 232
 233/* Audio support */
 234static void audio_init (PCIBus *pci_bus)
 235{
 236    vt82c686b_ac97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 5));
 237    vt82c686b_mc97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 6));
 238}
 239
 240/* Network support */
 241static void network_init (PCIBus *pci_bus)
 242{
 243    int i;
 244
 245    for(i = 0; i < nb_nics; i++) {
 246        NICInfo *nd = &nd_table[i];
 247        const char *default_devaddr = NULL;
 248
 249        if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 250            /* The fulong board has a RTL8139 card using PCI SLOT 7 */
 251            default_devaddr = "07";
 252        }
 253
 254        pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 255    }
 256}
 257
 258static void mips_fulong2e_init(MachineState *machine)
 259{
 260    ram_addr_t ram_size = machine->ram_size;
 261    const char *kernel_filename = machine->kernel_filename;
 262    const char *kernel_cmdline = machine->kernel_cmdline;
 263    const char *initrd_filename = machine->initrd_filename;
 264    char *filename;
 265    MemoryRegion *address_space_mem = get_system_memory();
 266    MemoryRegion *ram = g_new(MemoryRegion, 1);
 267    MemoryRegion *bios = g_new(MemoryRegion, 1);
 268    long bios_size;
 269    int64_t kernel_entry;
 270    qemu_irq *i8259;
 271    PCIBus *pci_bus;
 272    ISABus *isa_bus;
 273    I2CBus *smbus;
 274    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 275    MIPSCPU *cpu;
 276    CPUMIPSState *env;
 277
 278    /* init CPUs */
 279    cpu = MIPS_CPU(cpu_create(machine->cpu_type));
 280    env = &cpu->env;
 281
 282    qemu_register_reset(main_cpu_reset, cpu);
 283
 284    /* fulong 2e has 256M ram. */
 285    ram_size = 256 * 1024 * 1024;
 286
 287    /* fulong 2e has a 1M flash.Winbond W39L040AP70Z */
 288    bios_size = 1024 * 1024;
 289
 290    /* allocate RAM */
 291    memory_region_allocate_system_memory(ram, NULL, "fulong2e.ram", ram_size);
 292    memory_region_init_ram(bios, NULL, "fulong2e.bios", bios_size,
 293                           &error_fatal);
 294    memory_region_set_readonly(bios, true);
 295
 296    memory_region_add_subregion(address_space_mem, 0, ram);
 297    memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 298
 299    /* We do not support flash operation, just loading pmon.bin as raw BIOS.
 300     * Please use -L to set the BIOS path and -bios to set bios name. */
 301
 302    if (kernel_filename) {
 303        loaderparams.ram_size = ram_size;
 304        loaderparams.kernel_filename = kernel_filename;
 305        loaderparams.kernel_cmdline = kernel_cmdline;
 306        loaderparams.initrd_filename = initrd_filename;
 307        kernel_entry = load_kernel (env);
 308        write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 309    } else {
 310        if (bios_name == NULL) {
 311                bios_name = FULONG_BIOSNAME;
 312        }
 313        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 314        if (filename) {
 315            bios_size = load_image_targphys(filename, 0x1fc00000LL,
 316                                            BIOS_SIZE);
 317            g_free(filename);
 318        } else {
 319            bios_size = -1;
 320        }
 321
 322        if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 323            !kernel_filename && !qtest_enabled()) {
 324            error_report("Could not load MIPS bios '%s'", bios_name);
 325            exit(1);
 326        }
 327    }
 328
 329    /* Init internal devices */
 330    cpu_mips_irq_init_cpu(cpu);
 331    cpu_mips_clock_init(cpu);
 332
 333    /* North bridge, Bonito --> IP2 */
 334    pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 335
 336    /* South bridge */
 337    ide_drive_get(hd, ARRAY_SIZE(hd));
 338
 339    isa_bus = vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 0));
 340    if (!isa_bus) {
 341        fprintf(stderr, "vt82c686b_init error\n");
 342        exit(1);
 343    }
 344
 345    /* Interrupt controller */
 346    /* The 8259 -> IP5  */
 347    i8259 = i8259_init(isa_bus, env->irq[5]);
 348    isa_bus_irqs(isa_bus, i8259);
 349
 350    vt82c686b_ide_init(pci_bus, hd, PCI_DEVFN(FULONG2E_VIA_SLOT, 1));
 351    pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 2),
 352                      "vt82c686b-usb-uhci");
 353    pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 3),
 354                      "vt82c686b-usb-uhci");
 355
 356    smbus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 4),
 357                              0xeee1, NULL);
 358    /* TODO: Populate SPD eeprom data.  */
 359    smbus_eeprom_init(smbus, 1, eeprom_spd, sizeof(eeprom_spd));
 360
 361    /* init other devices */
 362    pit = pit_init(isa_bus, 0x40, 0, NULL);
 363    DMA_init(isa_bus, 0);
 364
 365    /* Super I/O */
 366    isa_create_simple(isa_bus, "i8042");
 367
 368    rtc_init(isa_bus, 2000, NULL);
 369
 370    serial_hds_isa_init(isa_bus, 0, MAX_SERIAL_PORTS);
 371    parallel_hds_isa_init(isa_bus, 1);
 372
 373    /* Sound card */
 374    audio_init(pci_bus);
 375    /* Network card */
 376    network_init(pci_bus);
 377}
 378
 379static void mips_fulong2e_machine_init(MachineClass *mc)
 380{
 381    mc->desc = "Fulong 2e mini pc";
 382    mc->init = mips_fulong2e_init;
 383    mc->block_default_type = IF_IDE;
 384    mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 385}
 386
 387DEFINE_MACHINE("fulong2e", mips_fulong2e_machine_init)
 388