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