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
  10 /*
  11  * Fulong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)
  12  * http://www.linux-mips.org/wiki/Fulong
  13  *
  14  * Loongson 2e user manual:
  15  * http://www.loongsondeveloper.com/doc/Loongson2EUserGuide.pdf
  16  */
  17
  18 #include "hw.h"
  19 #include "pc.h"
  20 #include "fdc.h"
  21 #include "net.h"
  22 #include "boards.h"
  23 #include "smbus.h"
  24 #include "block.h"
  25 #include "flash.h"
  26 #include "mips.h"
  27 #include "mips_cpudevs.h"
  28 #include "pci.h"
  29 #include "usb-uhci.h"
  30 #include "qemu-char.h"
  31 #include "sysemu.h"
  32 #include "audio/audio.h"
  33 #include "qemu-log.h"
  34 #include "loader.h"
  35 #include "mips-bios.h"
  36 #include "ide.h"
  37 #include "elf.h"
  38 #include "vt82c686.h"
  39 #include "mc146818rtc.h"
  40 #include "blockdev.h"
  41 #include "exec-memory.h"
  42
  43 #define DEBUG_FULONG2E_INIT
  44
  45 #define ENVP_ADDR       0x80002000l
  46 #define ENVP_NB_ENTRIES         16
  47 #define ENVP_ENTRY_SIZE         256
  48
  49 #define MAX_IDE_BUS 2
  50
  51 /*
  52  * PMON is not part of qemu and released with BSD license, anyone
  53  * who want to build a pmon binary please first git-clone the source
  54  * from the git repository at:
  55  * http://www.loongson.cn/support/git/pmon
  56  * Then follow the "Compile Guide" available at:
  57  * http://dev.lemote.com/code/pmon
  58  *
  59  * Notes:
  60  * 1, don't use the source at http://dev.lemote.com/http_git/pmon.git
  61  * 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"
  62  * in the "Compile Guide".
  63  */
  64 #define FULONG_BIOSNAME "pmon_fulong2e.bin"
  65
  66 /* PCI SLOT in fulong 2e */
  67 #define FULONG2E_VIA_SLOT        5
  68 #define FULONG2E_ATI_SLOT        6
  69 #define FULONG2E_RTL8139_SLOT    7
  70
  71 static ISADevice *pit;
  72
  73 static struct _loaderparams {
  74     int ram_size;
  75     const char *kernel_filename;
  76     const char *kernel_cmdline;
  77     const char *initrd_filename;
  78 } loaderparams;
  79
  80 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t* prom_buf, int index,
  81                                         const char *string, ...)
  82 {
  83     va_list ap;
  84     int32_t table_addr;
  85
  86     if (index >= ENVP_NB_ENTRIES)
  87         return;
  88
  89     if (string == NULL) {
  90         prom_buf[index] = 0;
  91         return;
  92     }
  93
  94     table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
  95     prom_buf[index] = tswap32(ENVP_ADDR + table_addr);
  96
  97     va_start(ap, string);
  98     vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
  99     va_end(ap);
 100 }
 101
 102 static int64_t load_kernel (CPUState *env)
 103 {
 104     int64_t kernel_entry, kernel_low, kernel_high;
 105     int index = 0;
 106     long initrd_size;
 107     ram_addr_t initrd_offset;
 108     uint32_t *prom_buf;
 109     long prom_size;
 110
 111     if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,
 112                  (uint64_t *)&kernel_entry, (uint64_t *)&kernel_low,
 113                  (uint64_t *)&kernel_high, 0, ELF_MACHINE, 1) < 0) {
 114         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 115                 loaderparams.kernel_filename);
 116         exit(1);
 117     }
 118
 119     /* load initrd */
 120     initrd_size = 0;
 121     initrd_offset = 0;
 122     if (loaderparams.initrd_filename) {
 123         initrd_size = get_image_size (loaderparams.initrd_filename);
 124         if (initrd_size > 0) {
 125             initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
 126             if (initrd_offset + initrd_size > ram_size) {
 127                 fprintf(stderr,
 128                         "qemu: memory too small for initial ram disk '%s'\n",
 129                         loaderparams.initrd_filename);
 130                 exit(1);
 131             }
 132             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 133                                      initrd_offset, ram_size - initrd_offset);
 134         }
 135         if (initrd_size == (target_ulong) -1) {
 136             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 137                     loaderparams.initrd_filename);
 138             exit(1);
 139         }
 140     }
 141
 142     /* Setup prom parameters. */
 143     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 144     prom_buf = g_malloc(prom_size);
 145
 146     prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 147     if (initrd_size > 0) {
 148         prom_set(prom_buf, index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",
 149                  cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
 150                  loaderparams.kernel_cmdline);
 151     } else {
 152         prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 153     }
 154
 155     /* Setup minimum environment variables */
 156     prom_set(prom_buf, index++, "busclock=33000000");
 157     prom_set(prom_buf, index++, "cpuclock=100000000");
 158     prom_set(prom_buf, index++, "memsize=%i", loaderparams.ram_size/1024/1024);
 159     prom_set(prom_buf, index++, "modetty0=38400n8r");
 160     prom_set(prom_buf, index++, NULL);
 161
 162     rom_add_blob_fixed("prom", prom_buf, prom_size,
 163                        cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 164
 165     return kernel_entry;
 166 }
 167
 168 static void write_bootloader (CPUState *env, uint8_t *base, int64_t kernel_addr)
 169 {
 170     uint32_t *p;
 171
 172     /* Small bootloader */
 173     p = (uint32_t *) base;
 174
 175     stl_raw(p++, 0x0bf00010);                                      /* j 0x1fc00040 */
 176     stl_raw(p++, 0x00000000);                                      /* nop */
 177
 178     /* Second part of the bootloader */
 179     p = (uint32_t *) (base + 0x040);
 180
 181     stl_raw(p++, 0x3c040000);                                      /* lui a0, 0 */
 182     stl_raw(p++, 0x34840002);                                      /* ori a0, a0, 2 */
 183     stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 184     stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a0, low(ENVP_ADDR) */
 185     stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 186     stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 187     stl_raw(p++, 0x3c070000 | (loaderparams.ram_size >> 16));      /* lui a3, high(env->ram_size) */
 188     stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));   /* ori a3, a3, low(env->ram_size) */
 189     stl_raw(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));     /* lui ra, high(kernel_addr) */;
 190     stl_raw(p++, 0x37ff0000 | (kernel_addr & 0xffff));             /* ori ra, ra, low(kernel_addr) */
 191     stl_raw(p++, 0x03e00008);                                      /* jr ra */
 192     stl_raw(p++, 0x00000000);                                      /* nop */
 193 }
 194
 195
 196 static void main_cpu_reset(void *opaque)
 197 {
 198     CPUState *env = opaque;
 199
 200     cpu_reset(env);
 201     /* TODO: 2E reset stuff */
 202     if (loaderparams.kernel_filename) {
 203         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 204     }
 205 }
 206
 207 uint8_t eeprom_spd[0x80] = {
 208     0x80,0x08,0x07,0x0d,0x09,0x02,0x40,0x00,0x04,0x70,
 209     0x70,0x00,0x82,0x10,0x00,0x01,0x0e,0x04,0x0c,0x01,
 210     0x02,0x20,0x80,0x75,0x70,0x00,0x00,0x50,0x3c,0x50,
 211     0x2d,0x20,0xb0,0xb0,0x50,0x50,0x00,0x00,0x00,0x00,
 212     0x00,0x41,0x48,0x3c,0x32,0x75,0x00,0x00,0x00,0x00,
 213     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 214     0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 215     0x00,0x00,0x00,0x9c,0x7b,0x07,0x00,0x00,0x00,0x00,
 216     0x00,0x00,0x00,0x00,0x48,0x42,0x35,0x34,0x41,0x32,
 217     0x35,0x36,0x38,0x4b,0x4e,0x2d,0x41,0x37,0x35,0x42,
 218     0x20,0x30,0x20
 219 };
 220
 221 /* Audio support */
 222 static void audio_init (PCIBus *pci_bus)
 223 {
 224     vt82c686b_ac97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 5));
 225     vt82c686b_mc97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 6));
 226 }
 227
 228 /* Network support */
 229 static void network_init (void)
 230 {
 231     int i;
 232
 233     for(i = 0; i < nb_nics; i++) {
 234         NICInfo *nd = &nd_table[i];
 235         const char *default_devaddr = NULL;
 236
 237         if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 238             /* The fulong board has a RTL8139 card using PCI SLOT 7 */
 239             default_devaddr = "07";
 240         }
 241
 242         pci_nic_init_nofail(nd, "rtl8139", default_devaddr);
 243     }
 244 }
 245
 246 static void cpu_request_exit(void *opaque, int irq, int level)
 247 {
 248     CPUState *env = cpu_single_env;
 249
 250     if (env && level) {
 251         cpu_exit(env);
 252     }
 253 }
 254
 255 static void mips_fulong2e_init(ram_addr_t ram_size, const char *boot_device,
 256                         const char *kernel_filename, const char *kernel_cmdline,
 257                         const char *initrd_filename, const char *cpu_model)
 258 {
 259     char *filename;
 260     MemoryRegion *address_space_mem = get_system_memory();
 261     MemoryRegion *ram = g_new(MemoryRegion, 1);
 262     MemoryRegion *bios = g_new(MemoryRegion, 1);
 263     long bios_size;
 264     int64_t kernel_entry;
 265     qemu_irq *i8259;
 266     qemu_irq *cpu_exit_irq;
 267     int via_devfn;
 268     PCIBus *pci_bus;
 269     i2c_bus *smbus;
 270     int i;
 271     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 272     CPUState *env;
 273
 274     /* init CPUs */
 275     if (cpu_model == NULL) {
 276         cpu_model = "Loongson-2E";
 277     }
 278     env = cpu_init(cpu_model);
 279     if (!env) {
 280         fprintf(stderr, "Unable to find CPU definition\n");
 281         exit(1);
 282     }
 283
 284     register_savevm(NULL, "cpu", 0, 3, cpu_save, cpu_load, env);
 285     qemu_register_reset(main_cpu_reset, env);
 286
 287     /* fulong 2e has 256M ram. */
 288     ram_size = 256 * 1024 * 1024;
 289
 290     /* fulong 2e has a 1M flash.Winbond W39L040AP70Z */
 291     bios_size = 1024 * 1024;
 292
 293     /* allocate RAM */
 294     memory_region_init_ram(ram, NULL, "fulong2e.ram", ram_size);
 295     memory_region_init_ram(bios, NULL, "fulong2e.bios", bios_size);
 296     memory_region_set_readonly(bios, true);
 297
 298     memory_region_add_subregion(address_space_mem, 0, ram);
 299     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 300
 301     /* We do not support flash operation, just loading pmon.bin as raw BIOS.
 302      * Please use -L to set the BIOS path and -bios to set bios name. */
 303
 304     if (kernel_filename) {
 305         loaderparams.ram_size = ram_size;
 306         loaderparams.kernel_filename = kernel_filename;
 307         loaderparams.kernel_cmdline = kernel_cmdline;
 308         loaderparams.initrd_filename = initrd_filename;
 309         kernel_entry = load_kernel (env);
 310         write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 311     } else {
 312         if (bios_name == NULL) {
 313                 bios_name = FULONG_BIOSNAME;
 314         }
 315         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 316         if (filename) {
 317             bios_size = load_image_targphys(filename, 0x1fc00000LL,
 318                                             BIOS_SIZE);
 319             g_free(filename);
 320         } else {
 321             bios_size = -1;
 322         }
 323
 324         if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
 325             fprintf(stderr, "qemu: Could not load MIPS bios '%s'\n", bios_name);
 326             exit(1);
 327         }
 328     }
 329
 330     /* Init internal devices */
 331     cpu_mips_irq_init_cpu(env);
 332     cpu_mips_clock_init(env);
 333
 334     /* Interrupt controller */
 335     /* The 8259 -> IP5  */
 336     i8259 = i8259_init(env->irq[5]);
 337
 338     /* North bridge, Bonito --> IP2 */
 339     pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 340
 341     /* South bridge */
 342     ide_drive_get(hd, MAX_IDE_BUS);
 343
 344     via_devfn = vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 0));
 345     if (via_devfn < 0) {
 346         fprintf(stderr, "vt82c686b_init error\n");
 347         exit(1);
 348     }
 349
 350     isa_bus_irqs(i8259);
 351     vt82c686b_ide_init(pci_bus, hd, PCI_DEVFN(FULONG2E_VIA_SLOT, 1));
 352     usb_uhci_vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 2));
 353     usb_uhci_vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 3));
 354
 355     smbus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 4),
 356                               0xeee1, NULL);
 357     /* TODO: Populate SPD eeprom data.  */
 358     smbus_eeprom_init(smbus, 1, eeprom_spd, sizeof(eeprom_spd));
 359
 360     /* init other devices */
 361     pit = pit_init(0x40, 0);
 362     cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
 363     DMA_init(0, cpu_exit_irq);
 364
 365     /* Super I/O */
 366     isa_create_simple("i8042");
 367
 368     rtc_init(2000, NULL);
 369
 370     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
 371         if (serial_hds[i]) {
 372             serial_isa_init(i, serial_hds[i]);
 373         }
 374     }
 375
 376     if (parallel_hds[0]) {
 377         parallel_init(0, parallel_hds[0]);
 378     }
 379
 380     /* Sound card */
 381     audio_init(pci_bus);
 382     /* Network card */
 383     network_init();
 384 }
 385
 386 QEMUMachine mips_fulong2e_machine = {
 387     .name = "fulong2e",
 388     .desc = "Fulong 2e mini pc",
 389     .init = mips_fulong2e_init,
 390 };
 391
 392 static void mips_fulong2e_machine_init(void)
 393 {
 394     qemu_register_machine(&mips_fulong2e_machine);
 395 }
 396
 397 machine_init(mips_fulong2e_machine_init);