hw/mips/fuloong2e.c

   1 /*
   2  * QEMU fuloong 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  * Fuloong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)
  15  * https://www.linux-mips.org/wiki/Fuloong_2E
  16  *
  17  * Loongson 2e manuals:
  18  * https://github.com/loongson-community/docs/tree/master/2E
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "qemu-common.h"
  23 #include "qemu/datadir.h"
  24 #include "qemu/units.h"
  25 #include "qapi/error.h"
  26 #include "cpu.h"
  27 #include "hw/clock.h"
  28 #include "hw/intc/i8259.h"
  29 #include "hw/dma/i8257.h"
  30 #include "hw/isa/superio.h"
  31 #include "net/net.h"
  32 #include "hw/boards.h"
  33 #include "hw/i2c/smbus_eeprom.h"
  34 #include "hw/block/flash.h"
  35 #include "hw/mips/mips.h"
  36 #include "hw/mips/cpudevs.h"
  37 #include "hw/pci/pci.h"
  38 #include "qemu/log.h"
  39 #include "hw/loader.h"
  40 #include "hw/ide/pci.h"
  41 #include "elf.h"
  42 #include "hw/isa/vt82c686.h"
  43 #include "hw/rtc/mc146818rtc.h"
  44 #include "hw/timer/i8254.h"
  45 #include "exec/address-spaces.h"
  46 #include "sysemu/qtest.h"
  47 #include "sysemu/reset.h"
  48 #include "qemu/error-report.h"
  49
  50 #define ENVP_PADDR              0x2000
  51 #define ENVP_VADDR              cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR)
  52 #define ENVP_NB_ENTRIES         16
  53 #define ENVP_ENTRY_SIZE         256
  54
  55 /* Fuloong 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  * https://github.com/loongson-community/pmon
  64  */
  65 #define FULOONG_BIOSNAME "pmon_2e.bin"
  66
  67 /* PCI SLOT in Fuloong 2e */
  68 #define FULOONG2E_VIA_SLOT        5
  69 #define FULOONG2E_ATI_SLOT        6
  70 #define FULOONG2E_RTL8139_SLOT    7
  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
  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_VADDR + 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 uint64_t load_kernel(MIPSCPU *cpu)
 103 {
 104     uint64_t kernel_entry, kernel_high, initrd_size;
 105     int index = 0;
 106     long kernel_size;
 107     ram_addr_t initrd_offset;
 108     uint32_t *prom_buf;
 109     long prom_size;
 110
 111     kernel_size = load_elf(loaderparams.kernel_filename, NULL,
 112                            cpu_mips_kseg0_to_phys, NULL,
 113                            &kernel_entry, NULL,
 114                            &kernel_high, NULL,
 115                            0, EM_MIPS, 1, 0);
 116     if (kernel_size < 0) {
 117         error_report("could not load kernel '%s': %s",
 118                      loaderparams.kernel_filename,
 119                      load_elf_strerror(kernel_size));
 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 = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
 130             if (initrd_offset + initrd_size > loaderparams.ram_size) {
 131                 error_report("memory too small for initial ram disk '%s'",
 132                              loaderparams.initrd_filename);
 133                 exit(1);
 134             }
 135             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 136                                               initrd_offset,
 137                                               loaderparams.ram_size - initrd_offset);
 138         }
 139         if (initrd_size == (target_ulong) -1) {
 140             error_report("could not load initial ram disk '%s'",
 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++,
 153                  "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
 154                  cpu_mips_phys_to_kseg0(NULL, initrd_offset),
 155                  initrd_size, loaderparams.kernel_cmdline);
 156     } else {
 157         prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 158     }
 159
 160     /* Setup minimum environment variables */
 161     prom_set(prom_buf, index++, "busclock=33000000");
 162     prom_set(prom_buf, index++, "cpuclock=%u", clock_get_hz(cpu->clock));
 163     prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
 164     prom_set(prom_buf, index++, NULL);
 165
 166     rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR);
 167
 168     g_free(prom_buf);
 169     return kernel_entry;
 170 }
 171
 172 static void write_bootloader(CPUMIPSState *env, uint8_t *base,
 173                              uint64_t kernel_addr)
 174 {
 175     uint32_t *p;
 176
 177     /* Small bootloader */
 178     p = (uint32_t *)base;
 179
 180     /* j 0x1fc00040 */
 181     stl_p(p++, 0x0bf00010);
 182     /* nop */
 183     stl_p(p++, 0x00000000);
 184
 185     /* Second part of the bootloader */
 186     p = (uint32_t *)(base + 0x040);
 187
 188     /* lui a0, 0 */
 189     stl_p(p++, 0x3c040000);
 190     /* ori a0, a0, 2 */
 191     stl_p(p++, 0x34840002);
 192     /* lui a1, high(ENVP_VADDR) */
 193     stl_p(p++, 0x3c050000 | ((ENVP_VADDR >> 16) & 0xffff));
 194     /* ori a1, a0, low(ENVP_VADDR) */
 195     stl_p(p++, 0x34a50000 | (ENVP_VADDR & 0xffff));
 196     /* lui a2, high(ENVP_VADDR + 8) */
 197     stl_p(p++, 0x3c060000 | (((ENVP_VADDR + 8) >> 16) & 0xffff));
 198     /* ori a2, a2, low(ENVP_VADDR + 8) */
 199     stl_p(p++, 0x34c60000 | ((ENVP_VADDR + 8) & 0xffff));
 200     /* lui a3, high(env->ram_size) */
 201     stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16));
 202     /* ori a3, a3, low(env->ram_size) */
 203     stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));
 204     /* lui ra, high(kernel_addr) */
 205     stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));
 206     /* ori ra, ra, low(kernel_addr) */
 207     stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff));
 208     /* jr ra */
 209     stl_p(p++, 0x03e00008);
 210     /* nop */
 211     stl_p(p++, 0x00000000);
 212 }
 213
 214 static void main_cpu_reset(void *opaque)
 215 {
 216     MIPSCPU *cpu = opaque;
 217     CPUMIPSState *env = &cpu->env;
 218
 219     cpu_reset(CPU(cpu));
 220     /* TODO: 2E reset stuff */
 221     if (loaderparams.kernel_filename) {
 222         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 223     }
 224 }
 225
 226 static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
 227                                        I2CBus **i2c_bus, ISABus **p_isa_bus)
 228 {
 229     qemu_irq *i8259;
 230     ISABus *isa_bus;
 231     PCIDevice *dev;
 232
 233     dev = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(slot, 0), true,
 234                                           TYPE_VT82C686B_ISA);
 235     isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(dev), "isa.0"));
 236     assert(isa_bus);
 237     *p_isa_bus = isa_bus;
 238     /* Interrupt controller */
 239     /* The 8259 -> IP5  */
 240     i8259 = i8259_init(isa_bus, intc);
 241     isa_bus_irqs(isa_bus, i8259);
 242     /* init other devices */
 243     i8254_pit_init(isa_bus, 0x40, 0, NULL);
 244     i8257_dma_init(isa_bus, 0);
 245     /* Super I/O */
 246     isa_create_simple(isa_bus, TYPE_VT82C686B_SUPERIO);
 247
 248     dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide");
 249     pci_ide_create_devs(dev);
 250
 251     pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci");
 252     pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci");
 253
 254     dev = pci_new(PCI_DEVFN(slot, 4), TYPE_VT82C686B_PM);
 255     qdev_prop_set_uint32(DEVICE(dev), "smb_io_base", 0xeee1);
 256     pci_realize_and_unref(dev, pci_bus, &error_fatal);
 257     *i2c_bus = I2C_BUS(qdev_get_child_bus(DEVICE(dev), "i2c"));
 258
 259     /* Audio support */
 260     pci_create_simple(pci_bus, PCI_DEVFN(slot, 5), TYPE_VIA_AC97);
 261     pci_create_simple(pci_bus, PCI_DEVFN(slot, 6), TYPE_VIA_MC97);
 262 }
 263
 264 /* Network support */
 265 static void network_init(PCIBus *pci_bus)
 266 {
 267     int i;
 268
 269     for (i = 0; i < nb_nics; i++) {
 270         NICInfo *nd = &nd_table[i];
 271         const char *default_devaddr = NULL;
 272
 273         if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 274             /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */
 275             default_devaddr = "07";
 276         }
 277
 278         pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 279     }
 280 }
 281
 282 static void mips_fuloong2e_init(MachineState *machine)
 283 {
 284     const char *kernel_filename = machine->kernel_filename;
 285     const char *kernel_cmdline = machine->kernel_cmdline;
 286     const char *initrd_filename = machine->initrd_filename;
 287     char *filename;
 288     MemoryRegion *address_space_mem = get_system_memory();
 289     MemoryRegion *bios = g_new(MemoryRegion, 1);
 290     long bios_size;
 291     uint8_t *spd_data;
 292     uint64_t kernel_entry;
 293     PCIDevice *pci_dev;
 294     PCIBus *pci_bus;
 295     ISABus *isa_bus;
 296     I2CBus *smbus;
 297     Clock *cpuclk;
 298     MIPSCPU *cpu;
 299     CPUMIPSState *env;
 300     DeviceState *dev;
 301
 302     cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
 303     clock_set_hz(cpuclk, 533080000); /* ~533 MHz */
 304
 305     /* init CPUs */
 306     cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
 307     env = &cpu->env;
 308
 309     qemu_register_reset(main_cpu_reset, cpu);
 310
 311     /* TODO: support more than 256M RAM as highmem */
 312     if (machine->ram_size != 256 * MiB) {
 313         error_report("Invalid RAM size, should be 256MB");
 314         exit(EXIT_FAILURE);
 315     }
 316     memory_region_add_subregion(address_space_mem, 0, machine->ram);
 317
 318     /* Boot ROM */
 319     memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
 320                            &error_fatal);
 321     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 322
 323     /*
 324      * We do not support flash operation, just loading pmon.bin as raw BIOS.
 325      * Please use -L to set the BIOS path and -bios to set bios name.
 326      */
 327
 328     if (kernel_filename) {
 329         loaderparams.ram_size = machine->ram_size;
 330         loaderparams.kernel_filename = kernel_filename;
 331         loaderparams.kernel_cmdline = kernel_cmdline;
 332         loaderparams.initrd_filename = initrd_filename;
 333         kernel_entry = load_kernel(cpu);
 334         write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 335     } else {
 336         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 337                                   machine->firmware ?: FULOONG_BIOSNAME);
 338         if (filename) {
 339             bios_size = load_image_targphys(filename, 0x1fc00000LL,
 340                                             BIOS_SIZE);
 341             g_free(filename);
 342         } else {
 343             bios_size = -1;
 344         }
 345
 346         if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 347             machine->firmware && !qtest_enabled()) {
 348             error_report("Could not load MIPS bios '%s'", machine->firmware);
 349             exit(1);
 350         }
 351     }
 352
 353     /* Init internal devices */
 354     cpu_mips_irq_init_cpu(cpu);
 355     cpu_mips_clock_init(cpu);
 356
 357     /* North bridge, Bonito --> IP2 */
 358     pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 359
 360     /* South bridge -> IP5 */
 361     vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5],
 362                                &smbus, &isa_bus);
 363
 364     /* GPU */
 365     if (vga_interface_type != VGA_NONE) {
 366         pci_dev = pci_new(-1, "ati-vga");
 367         dev = DEVICE(pci_dev);
 368         qdev_prop_set_uint32(dev, "vgamem_mb", 16);
 369         qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
 370         pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
 371     }
 372
 373     /* Populate SPD eeprom data */
 374     spd_data = spd_data_generate(DDR, machine->ram_size);
 375     smbus_eeprom_init_one(smbus, 0x50, spd_data);
 376
 377     mc146818_rtc_init(isa_bus, 2000, NULL);
 378
 379     /* Network card: RTL8139D */
 380     network_init(pci_bus);
 381 }
 382
 383 static void mips_fuloong2e_machine_init(MachineClass *mc)
 384 {
 385     mc->desc = "Fuloong 2e mini pc";
 386     mc->init = mips_fuloong2e_init;
 387     mc->block_default_type = IF_IDE;
 388     mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 389     mc->default_ram_size = 256 * MiB;
 390     mc->default_ram_id = "fuloong2e.ram";
 391     mc->minimum_page_bits = 14;
 392 }
 393
 394 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)