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/hw.h"
  27#include "hw/i386/pc.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 "audio/audio.h"
  38#include "qemu/log.h"
  39#include "hw/loader.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 "exec/address-spaces.h"
  46#include "sysemu/qtest.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    if (string == NULL) {
  96        prom_buf[index] = 0;
  97        return;
  98    }
  99
 100    table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
 101    prom_buf[index] = tswap32(ENVP_ADDR + table_addr);
 102
 103    va_start(ap, string);
 104    vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
 105    va_end(ap);
 106}
 107
 108static int64_t load_kernel (CPUMIPSState *env)
 109{
 110    int64_t kernel_entry, kernel_low, kernel_high, initrd_size;
 111    int index = 0;
 112    long kernel_size;
 113    ram_addr_t initrd_offset;
 114    uint32_t *prom_buf;
 115    long prom_size;
 116
 117    kernel_size = load_elf(loaderparams.kernel_filename, NULL,
 118                           cpu_mips_kseg0_to_phys, NULL,
 119                           (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("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                error_report("memory too small for initial ram disk '%s'",
 138                             loaderparams.initrd_filename);
 139                exit(1);
 140            }
 141            initrd_size = load_image_targphys(loaderparams.initrd_filename,
 142                                     initrd_offset, ram_size - initrd_offset);
 143        }
 144        if (initrd_size == (target_ulong) -1) {
 145            error_report("could not load initial ram disk '%s'",
 146                         loaderparams.initrd_filename);
 147            exit(1);
 148        }
 149    }
 150
 151    /* Setup prom parameters. */
 152    prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 153    prom_buf = g_malloc(prom_size);
 154
 155    prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 156    if (initrd_size > 0) {
 157        prom_set(prom_buf, index++, "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
 158                 cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
 159                 loaderparams.kernel_cmdline);
 160    } else {
 161        prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 162    }
 163
 164    /* Setup minimum environment variables */
 165    prom_set(prom_buf, index++, "busclock=33000000");
 166    prom_set(prom_buf, index++, "cpuclock=100000000");
 167    prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
 168    prom_set(prom_buf, index++, "modetty0=38400n8r");
 169    prom_set(prom_buf, index++, NULL);
 170
 171    rom_add_blob_fixed("prom", prom_buf, prom_size,
 172                       cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 173
 174    g_free(prom_buf);
 175    return kernel_entry;
 176}
 177
 178static void write_bootloader (CPUMIPSState *env, uint8_t *base, int64_t kernel_addr)
 179{
 180    uint32_t *p;
 181
 182    /* Small bootloader */
 183    p = (uint32_t *) base;
 184
 185    stl_p(p++, 0x0bf00010);                                      /* j 0x1fc00040 */
 186    stl_p(p++, 0x00000000);                                      /* nop */
 187
 188    /* Second part of the bootloader */
 189    p = (uint32_t *) (base + 0x040);
 190
 191    stl_p(p++, 0x3c040000);                                      /* lui a0, 0 */
 192    stl_p(p++, 0x34840002);                                      /* ori a0, a0, 2 */
 193    stl_p(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 194    stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a0, low(ENVP_ADDR) */
 195    stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 196    stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 197    stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16));      /* lui a3, high(env->ram_size) */
 198    stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));   /* ori a3, a3, low(env->ram_size) */
 199    stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));     /* lui ra, high(kernel_addr) */;
 200    stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff));             /* ori ra, ra, low(kernel_addr) */
 201    stl_p(p++, 0x03e00008);                                      /* jr ra */
 202    stl_p(p++, 0x00000000);                                      /* nop */
 203}
 204
 205
 206static void main_cpu_reset(void *opaque)
 207{
 208    MIPSCPU *cpu = opaque;
 209    CPUMIPSState *env = &cpu->env;
 210
 211    cpu_reset(CPU(cpu));
 212    /* TODO: 2E reset stuff */
 213    if (loaderparams.kernel_filename) {
 214        env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 215    }
 216}
 217
 218static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
 219                                       I2CBus **i2c_bus, ISABus **p_isa_bus)
 220{
 221    qemu_irq *i8259;
 222    ISABus *isa_bus;
 223    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 224
 225    isa_bus = vt82c686b_isa_init(pci_bus, PCI_DEVFN(slot, 0));
 226    if (!isa_bus) {
 227        fprintf(stderr, "vt82c686b_init error\n");
 228        exit(1);
 229    }
 230    *p_isa_bus = isa_bus;
 231    /* Interrupt controller */
 232    /* The 8259 -> IP5  */
 233    i8259 = i8259_init(isa_bus, intc);
 234    isa_bus_irqs(isa_bus, i8259);
 235    /* init other devices */
 236    i8254_pit_init(isa_bus, 0x40, 0, NULL);
 237    i8257_dma_init(isa_bus, 0);
 238    /* Super I/O */
 239    isa_create_simple(isa_bus, TYPE_VT82C686B_SUPERIO);
 240
 241    ide_drive_get(hd, ARRAY_SIZE(hd));
 242    via_ide_init(pci_bus, hd, PCI_DEVFN(slot, 1));
 243
 244    pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci");
 245    pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci");
 246
 247    *i2c_bus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(slot, 4), 0xeee1, NULL);
 248
 249    /* Audio support */
 250    vt82c686b_ac97_init(pci_bus, PCI_DEVFN(slot, 5));
 251    vt82c686b_mc97_init(pci_bus, PCI_DEVFN(slot, 6));
 252}
 253
 254/* Network support */
 255static void network_init (PCIBus *pci_bus)
 256{
 257    int i;
 258
 259    for(i = 0; i < nb_nics; i++) {
 260        NICInfo *nd = &nd_table[i];
 261        const char *default_devaddr = NULL;
 262
 263        if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 264            /* The fulong board has a RTL8139 card using PCI SLOT 7 */
 265            default_devaddr = "07";
 266        }
 267
 268        pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 269    }
 270}
 271
 272static void mips_fulong2e_init(MachineState *machine)
 273{
 274    const char *kernel_filename = machine->kernel_filename;
 275    const char *kernel_cmdline = machine->kernel_cmdline;
 276    const char *initrd_filename = machine->initrd_filename;
 277    char *filename;
 278    MemoryRegion *address_space_mem = get_system_memory();
 279    MemoryRegion *ram = g_new(MemoryRegion, 1);
 280    MemoryRegion *bios = g_new(MemoryRegion, 1);
 281    ram_addr_t ram_size = machine->ram_size;
 282    long bios_size;
 283    uint8_t *spd_data;
 284    Error *err = NULL;
 285    int64_t kernel_entry;
 286    PCIBus *pci_bus;
 287    ISABus *isa_bus;
 288    I2CBus *smbus;
 289    MIPSCPU *cpu;
 290    CPUMIPSState *env;
 291    DeviceState *dev;
 292
 293    /* init CPUs */
 294    cpu = MIPS_CPU(cpu_create(machine->cpu_type));
 295    env = &cpu->env;
 296
 297    qemu_register_reset(main_cpu_reset, cpu);
 298
 299    /* TODO: support more than 256M RAM as highmem */
 300    ram_size = 256 * MiB;
 301
 302    /* allocate RAM */
 303    memory_region_allocate_system_memory(ram, NULL, "fulong2e.ram", ram_size);
 304    memory_region_init_ram(bios, NULL, "fulong2e.bios", BIOS_SIZE,
 305                           &error_fatal);
 306    memory_region_set_readonly(bios, true);
 307
 308    memory_region_add_subregion(address_space_mem, 0, ram);
 309    memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 310
 311    /* We do not support flash operation, just loading pmon.bin as raw BIOS.
 312     * Please use -L to set the BIOS path and -bios to set bios name. */
 313
 314    if (kernel_filename) {
 315        loaderparams.ram_size = ram_size;
 316        loaderparams.kernel_filename = kernel_filename;
 317        loaderparams.kernel_cmdline = kernel_cmdline;
 318        loaderparams.initrd_filename = initrd_filename;
 319        kernel_entry = load_kernel (env);
 320        write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 321    } else {
 322        if (bios_name == NULL) {
 323                bios_name = FULONG_BIOSNAME;
 324        }
 325        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 326        if (filename) {
 327            bios_size = load_image_targphys(filename, 0x1fc00000LL,
 328                                            BIOS_SIZE);
 329            g_free(filename);
 330        } else {
 331            bios_size = -1;
 332        }
 333
 334        if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 335            !kernel_filename && !qtest_enabled()) {
 336            error_report("Could not load MIPS bios '%s'", bios_name);
 337            exit(1);
 338        }
 339    }
 340
 341    /* Init internal devices */
 342    cpu_mips_irq_init_cpu(cpu);
 343    cpu_mips_clock_init(cpu);
 344
 345    /* North bridge, Bonito --> IP2 */
 346    pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 347
 348    /* South bridge -> IP5 */
 349    vt82c686b_southbridge_init(pci_bus, FULONG2E_VIA_SLOT, env->irq[5],
 350                               &smbus, &isa_bus);
 351
 352    /* GPU */
 353    if (vga_interface_type != VGA_NONE) {
 354        dev = DEVICE(pci_create(pci_bus, -1, "ati-vga"));
 355        qdev_prop_set_uint32(dev, "vgamem_mb", 16);
 356        qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
 357        qdev_init_nofail(dev);
 358    }
 359
 360    /* Populate SPD eeprom data */
 361    spd_data = spd_data_generate(DDR, ram_size, &err);
 362    if (err) {
 363        warn_report_err(err);
 364    }
 365    if (spd_data) {
 366        smbus_eeprom_init_one(smbus, 0x50, spd_data);
 367    }
 368
 369    mc146818_rtc_init(isa_bus, 2000, NULL);
 370
 371    /* Network card: RTL8139D */
 372    network_init(pci_bus);
 373}
 374
 375static void mips_fulong2e_machine_init(MachineClass *mc)
 376{
 377    mc->desc = "Fulong 2e mini pc";
 378    mc->init = mips_fulong2e_init;
 379    mc->block_default_type = IF_IDE;
 380    mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 381    mc->default_ram_size = 256 * MiB;
 382}
 383
 384DEFINE_MACHINE("fulong2e", mips_fulong2e_machine_init)
 385