hw/mips_fulong2e.c

   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 "hw.h"
  22 #include "pc.h"
  23 #include "fdc.h"
  24 #include "net.h"
  25 #include "boards.h"
  26 #include "smbus.h"
  27 #include "block.h"
  28 #include "flash.h"
  29 #include "mips.h"
  30 #include "mips_cpudevs.h"
  31 #include "pci.h"
  32 #include "usb-uhci.h"
  33 #include "qemu-char.h"
  34 #include "sysemu.h"
  35 #include "audio/audio.h"
  36 #include "qemu-log.h"
  37 #include "loader.h"
  38 #include "mips-bios.h"
  39 #include "ide.h"
  40 #include "elf.h"
  41 #include "vt82c686.h"
  42 #include "mc146818rtc.h"
  43 #include "i8254.h"
  44 #include "blockdev.h"
  45 #include "exec-memory.h"
  46
  47 #define DEBUG_FULONG2E_INIT
  48
  49 #define ENVP_ADDR       0x80002000l
  50 #define ENVP_NB_ENTRIES         16
  51 #define ENVP_ENTRY_SIZE         256
  52
  53 #define MAX_IDE_BUS 2
  54
  55 /*
  56  * PMON is not part of qemu and released with BSD license, anyone
  57  * who want to build a pmon binary please first git-clone the source
  58  * from the git repository at:
  59  * http://www.loongson.cn/support/git/pmon
  60  * Then follow the "Compile Guide" available at:
  61  * http://dev.lemote.com/code/pmon
  62  *
  63  * Notes:
  64  * 1, don't use the source at http://dev.lemote.com/http_git/pmon.git
  65  * 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"
  66  * in the "Compile Guide".
  67  */
  68 #define FULONG_BIOSNAME "pmon_fulong2e.bin"
  69
  70 /* PCI SLOT in fulong 2e */
  71 #define FULONG2E_VIA_SLOT        5
  72 #define FULONG2E_ATI_SLOT        6
  73 #define FULONG2E_RTL8139_SLOT    7
  74
  75 static ISADevice *pit;
  76
  77 static struct _loaderparams {
  78     int ram_size;
  79     const char *kernel_filename;
  80     const char *kernel_cmdline;
  81     const char *initrd_filename;
  82 } loaderparams;
  83
  84 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t* prom_buf, int index,
  85                                         const char *string, ...)
  86 {
  87     va_list ap;
  88     int32_t table_addr;
  89
  90     if (index >= ENVP_NB_ENTRIES)
  91         return;
  92
  93     if (string == NULL) {
  94         prom_buf[index] = 0;
  95         return;
  96     }
  97
  98     table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
  99     prom_buf[index] = tswap32(ENVP_ADDR + table_addr);
 100
 101     va_start(ap, string);
 102     vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
 103     va_end(ap);
 104 }
 105
 106 static int64_t load_kernel (CPUState *env)
 107 {
 108     int64_t kernel_entry, kernel_low, kernel_high;
 109     int index = 0;
 110     long initrd_size;
 111     ram_addr_t initrd_offset;
 112     uint32_t *prom_buf;
 113     long prom_size;
 114
 115     if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,
 116                  (uint64_t *)&kernel_entry, (uint64_t *)&kernel_low,
 117                  (uint64_t *)&kernel_high, 0, ELF_MACHINE, 1) < 0) {
 118         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 119                 loaderparams.kernel_filename);
 120         exit(1);
 121     }
 122
 123     /* load initrd */
 124     initrd_size = 0;
 125     initrd_offset = 0;
 126     if (loaderparams.initrd_filename) {
 127         initrd_size = get_image_size (loaderparams.initrd_filename);
 128         if (initrd_size > 0) {
 129             initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
 130             if (initrd_offset + initrd_size > ram_size) {
 131                 fprintf(stderr,
 132                         "qemu: memory too small for initial ram disk '%s'\n",
 133                         loaderparams.initrd_filename);
 134                 exit(1);
 135             }
 136             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 137                                      initrd_offset, ram_size - initrd_offset);
 138         }
 139         if (initrd_size == (target_ulong) -1) {
 140             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 141                     loaderparams.initrd_filename);
 142             exit(1);
 143         }
 144     }
 145
 146     /* Setup prom parameters. */
 147     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 148     prom_buf = g_malloc(prom_size);
 149
 150     prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 151     if (initrd_size > 0) {
 152         prom_set(prom_buf, index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",
 153                  cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
 154                  loaderparams.kernel_cmdline);
 155     } else {
 156         prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 157     }
 158
 159     /* Setup minimum environment variables */
 160     prom_set(prom_buf, index++, "busclock=33000000");
 161     prom_set(prom_buf, index++, "cpuclock=100000000");
 162     prom_set(prom_buf, index++, "memsize=%i", loaderparams.ram_size/1024/1024);
 163     prom_set(prom_buf, index++, "modetty0=38400n8r");
 164     prom_set(prom_buf, index++, NULL);
 165
 166     rom_add_blob_fixed("prom", prom_buf, prom_size,
 167                        cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 168
 169     return kernel_entry;
 170 }
 171
 172 static void write_bootloader (CPUState *env, uint8_t *base, int64_t kernel_addr)
 173 {
 174     uint32_t *p;
 175
 176     /* Small bootloader */
 177     p = (uint32_t *) base;
 178
 179     stl_raw(p++, 0x0bf00010);                                      /* j 0x1fc00040 */
 180     stl_raw(p++, 0x00000000);                                      /* nop */
 181
 182     /* Second part of the bootloader */
 183     p = (uint32_t *) (base + 0x040);
 184
 185     stl_raw(p++, 0x3c040000);                                      /* lui a0, 0 */
 186     stl_raw(p++, 0x34840002);                                      /* ori a0, a0, 2 */
 187     stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 188     stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a0, low(ENVP_ADDR) */
 189     stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 190     stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 191     stl_raw(p++, 0x3c070000 | (loaderparams.ram_size >> 16));      /* lui a3, high(env->ram_size) */
 192     stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));   /* ori a3, a3, low(env->ram_size) */
 193     stl_raw(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));     /* lui ra, high(kernel_addr) */;
 194     stl_raw(p++, 0x37ff0000 | (kernel_addr & 0xffff));             /* ori ra, ra, low(kernel_addr) */
 195     stl_raw(p++, 0x03e00008);                                      /* jr ra */
 196     stl_raw(p++, 0x00000000);                                      /* nop */
 197 }
 198
 199
 200 static void main_cpu_reset(void *opaque)
 201 {
 202     CPUState *env = opaque;
 203
 204     cpu_reset(env);
 205     /* TODO: 2E reset stuff */
 206     if (loaderparams.kernel_filename) {
 207         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 208     }
 209 }
 210
 211 uint8_t eeprom_spd[0x80] = {
 212     0x80,0x08,0x07,0x0d,0x09,0x02,0x40,0x00,0x04,0x70,
 213     0x70,0x00,0x82,0x10,0x00,0x01,0x0e,0x04,0x0c,0x01,
 214     0x02,0x20,0x80,0x75,0x70,0x00,0x00,0x50,0x3c,0x50,
 215     0x2d,0x20,0xb0,0xb0,0x50,0x50,0x00,0x00,0x00,0x00,
 216     0x00,0x41,0x48,0x3c,0x32,0x75,0x00,0x00,0x00,0x00,
 217     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 218     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 219     0x00,0x00,0x00,0x9c,0x7b,0x07,0x00,0x00,0x00,0x00,
 220     0x00,0x00,0x00,0x00,0x48,0x42,0x35,0x34,0x41,0x32,
 221     0x35,0x36,0x38,0x4b,0x4e,0x2d,0x41,0x37,0x35,0x42,
 222     0x20,0x30,0x20
 223 };
 224
 225 /* Audio support */
 226 static void audio_init (PCIBus *pci_bus)
 227 {
 228     vt82c686b_ac97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 5));
 229     vt82c686b_mc97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 6));
 230 }
 231
 232 /* Network support */
 233 static void network_init (void)
 234 {
 235     int i;
 236
 237     for(i = 0; i < nb_nics; i++) {
 238         NICInfo *nd = &nd_table[i];
 239         const char *default_devaddr = NULL;
 240
 241         if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 242             /* The fulong board has a RTL8139 card using PCI SLOT 7 */
 243             default_devaddr = "07";
 244         }
 245
 246         pci_nic_init_nofail(nd, "rtl8139", default_devaddr);
 247     }
 248 }
 249
 250 static void cpu_request_exit(void *opaque, int irq, int level)
 251 {
 252     CPUState *env = cpu_single_env;
 253
 254     if (env && level) {
 255         cpu_exit(env);
 256     }
 257 }
 258
 259 static void mips_fulong2e_init(ram_addr_t ram_size, const char *boot_device,
 260                         const char *kernel_filename, const char *kernel_cmdline,
 261                         const char *initrd_filename, const char *cpu_model)
 262 {
 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     qemu_irq *cpu_exit_irq;
 271     PCIBus *pci_bus;
 272     ISABus *isa_bus;
 273     i2c_bus *smbus;
 274     int i;
 275     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 276     CPUState *env;
 277
 278     /* init CPUs */
 279     if (cpu_model == NULL) {
 280         cpu_model = "Loongson-2E";
 281     }
 282     env = cpu_init(cpu_model);
 283     if (!env) {
 284         fprintf(stderr, "Unable to find CPU definition\n");
 285         exit(1);
 286     }
 287
 288     register_savevm(NULL, "cpu", 0, 3, cpu_save, cpu_load, env);
 289     qemu_register_reset(main_cpu_reset, env);
 290
 291     /* fulong 2e has 256M ram. */
 292     ram_size = 256 * 1024 * 1024;
 293
 294     /* fulong 2e has a 1M flash.Winbond W39L040AP70Z */
 295     bios_size = 1024 * 1024;
 296
 297     /* allocate RAM */
 298     memory_region_init_ram(ram, "fulong2e.ram", ram_size);
 299     vmstate_register_ram_global(ram);
 300     memory_region_init_ram(bios, "fulong2e.bios", bios_size);
 301     vmstate_register_ram_global(bios);
 302     memory_region_set_readonly(bios, true);
 303
 304     memory_region_add_subregion(address_space_mem, 0, ram);
 305     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 306
 307     /* We do not support flash operation, just loading pmon.bin as raw BIOS.
 308      * Please use -L to set the BIOS path and -bios to set bios name. */
 309
 310     if (kernel_filename) {
 311         loaderparams.ram_size = ram_size;
 312         loaderparams.kernel_filename = kernel_filename;
 313         loaderparams.kernel_cmdline = kernel_cmdline;
 314         loaderparams.initrd_filename = initrd_filename;
 315         kernel_entry = load_kernel (env);
 316         write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 317     } else {
 318         if (bios_name == NULL) {
 319                 bios_name = FULONG_BIOSNAME;
 320         }
 321         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 322         if (filename) {
 323             bios_size = load_image_targphys(filename, 0x1fc00000LL,
 324                                             BIOS_SIZE);
 325             g_free(filename);
 326         } else {
 327             bios_size = -1;
 328         }
 329
 330         if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
 331             fprintf(stderr, "qemu: Could not load MIPS bios '%s'\n", 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, MAX_IDE_BUS);
 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     usb_uhci_vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 2));
 359     usb_uhci_vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 3));
 360
 361     smbus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 4),
 362                               0xeee1, NULL);
 363     /* TODO: Populate SPD eeprom data.  */
 364     smbus_eeprom_init(smbus, 1, eeprom_spd, sizeof(eeprom_spd));
 365
 366     /* init other devices */
 367     pit = pit_init(isa_bus, 0x40, 0, NULL);
 368     cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
 369     DMA_init(0, cpu_exit_irq);
 370
 371     /* Super I/O */
 372     isa_create_simple(isa_bus, "i8042");
 373
 374     rtc_init(isa_bus, 2000, NULL);
 375
 376     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
 377         if (serial_hds[i]) {
 378             serial_isa_init(isa_bus, i, serial_hds[i]);
 379         }
 380     }
 381
 382     if (parallel_hds[0]) {
 383         parallel_init(isa_bus, 0, parallel_hds[0]);
 384     }
 385
 386     /* Sound card */
 387     audio_init(pci_bus);
 388     /* Network card */
 389     network_init();
 390 }
 391
 392 QEMUMachine mips_fulong2e_machine = {
 393     .name = "fulong2e",
 394     .desc = "Fulong 2e mini pc",
 395     .init = mips_fulong2e_init,
 396 };
 397
 398 static void mips_fulong2e_machine_init(void)
 399 {
 400     qemu_register_machine(&mips_fulong2e_machine);
 401 }
 402
 403 machine_init(mips_fulong2e_machine_init);