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 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/intc/i8259.h"
  27 #include "hw/dma/i8257.h"
  28 #include "hw/isa/superio.h"
  29 #include "net/net.h"
  30 #include "hw/boards.h"
  31 #include "hw/i2c/smbus_eeprom.h"
  32 #include "hw/block/flash.h"
  33 #include "hw/mips/mips.h"
  34 #include "hw/mips/cpudevs.h"
  35 #include "hw/pci/pci.h"
  36 #include "qemu/log.h"
  37 #include "hw/loader.h"
  38 #include "hw/ide/pci.h"
  39 #include "elf.h"
  40 #include "hw/isa/vt82c686.h"
  41 #include "hw/rtc/mc146818rtc.h"
  42 #include "hw/timer/i8254.h"
  43 #include "exec/address-spaces.h"
  44 #include "sysemu/qtest.h"
  45 #include "sysemu/reset.h"
  46 #include "qemu/error-report.h"
  47
  48 #define DEBUG_FULOONG2E_INIT
  49
  50 #define ENVP_ADDR               0x80002000l
  51 #define ENVP_NB_ENTRIES         16
  52 #define ENVP_ENTRY_SIZE         256
  53
  54 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
  55 #define BIOS_SIZE               (512 * KiB)
  56 #define MAX_IDE_BUS             2
  57
  58 /*
  59  * PMON is not part of qemu and released with BSD license, anyone
  60  * who want to build a pmon binary please first git-clone the source
  61  * from the git repository at:
  62  * http://www.loongson.cn/support/git/pmon
  63  * Then follow the "Compile Guide" available at:
  64  * http://dev.lemote.com/code/pmon
  65  *
  66  * Notes:
  67  * 1, don't use the source at http://dev.lemote.com/http_git/pmon.git
  68  * 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"
  69  * in the "Compile Guide".
  70  */
  71 #define FULOONG_BIOSNAME "pmon_2e.bin"
  72
  73 /* PCI SLOT in Fuloong 2e */
  74 #define FULOONG2E_VIA_SLOT        5
  75 #define FULOONG2E_ATI_SLOT        6
  76 #define FULOONG2E_RTL8139_SLOT    7
  77
  78 static struct _loaderparams {
  79     int ram_size;
  80     const char *kernel_filename;
  81     const char *kernel_cmdline;
  82     const char *initrd_filename;
  83 } loaderparams;
  84
  85 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index,
  86                                         const char *string, ...)
  87 {
  88     va_list ap;
  89     int32_t table_addr;
  90
  91     if (index >= ENVP_NB_ENTRIES) {
  92         return;
  93     }
  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
 108 static 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                            NULL, 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) &
 136                             INITRD_PAGE_MASK;
 137             if (initrd_offset + initrd_size > ram_size) {
 138                 error_report("memory too small for initial ram disk '%s'",
 139                              loaderparams.initrd_filename);
 140                 exit(1);
 141             }
 142             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 143                                               initrd_offset,
 144                                               ram_size - initrd_offset);
 145         }
 146         if (initrd_size == (target_ulong) -1) {
 147             error_report("could not load initial ram disk '%s'",
 148                          loaderparams.initrd_filename);
 149             exit(1);
 150         }
 151     }
 152
 153     /* Setup prom parameters. */
 154     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 155     prom_buf = g_malloc(prom_size);
 156
 157     prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 158     if (initrd_size > 0) {
 159         prom_set(prom_buf, index++,
 160                  "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
 161                  cpu_mips_phys_to_kseg0(NULL, initrd_offset),
 162                  initrd_size, loaderparams.kernel_cmdline);
 163     } else {
 164         prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 165     }
 166
 167     /* Setup minimum environment variables */
 168     prom_set(prom_buf, index++, "busclock=33000000");
 169     prom_set(prom_buf, index++, "cpuclock=100000000");
 170     prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
 171     prom_set(prom_buf, index++, "modetty0=38400n8r");
 172     prom_set(prom_buf, index++, NULL);
 173
 174     rom_add_blob_fixed("prom", prom_buf, prom_size,
 175                        cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));
 176
 177     g_free(prom_buf);
 178     return kernel_entry;
 179 }
 180
 181 static void write_bootloader(CPUMIPSState *env, uint8_t *base,
 182                              int64_t kernel_addr)
 183 {
 184     uint32_t *p;
 185
 186     /* Small bootloader */
 187     p = (uint32_t *)base;
 188
 189     /* j 0x1fc00040 */
 190     stl_p(p++, 0x0bf00010);
 191     /* nop */
 192     stl_p(p++, 0x00000000);
 193
 194     /* Second part of the bootloader */
 195     p = (uint32_t *)(base + 0x040);
 196
 197     /* lui a0, 0 */
 198     stl_p(p++, 0x3c040000);
 199     /* ori a0, a0, 2 */
 200     stl_p(p++, 0x34840002);
 201     /* lui a1, high(ENVP_ADDR) */
 202     stl_p(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));
 203     /* ori a1, a0, low(ENVP_ADDR) */
 204     stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));
 205     /* lui a2, high(ENVP_ADDR + 8) */
 206     stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff));
 207     /* ori a2, a2, low(ENVP_ADDR + 8) */
 208     stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));
 209     /* lui a3, high(env->ram_size) */
 210     stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16));
 211     /* ori a3, a3, low(env->ram_size) */
 212     stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));
 213     /* lui ra, high(kernel_addr) */
 214     stl_p(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));
 215     /* ori ra, ra, low(kernel_addr) */
 216     stl_p(p++, 0x37ff0000 | (kernel_addr & 0xffff));
 217     /* jr ra */
 218     stl_p(p++, 0x03e00008);
 219     /* nop */
 220     stl_p(p++, 0x00000000);
 221 }
 222
 223 static void main_cpu_reset(void *opaque)
 224 {
 225     MIPSCPU *cpu = opaque;
 226     CPUMIPSState *env = &cpu->env;
 227
 228     cpu_reset(CPU(cpu));
 229     /* TODO: 2E reset stuff */
 230     if (loaderparams.kernel_filename) {
 231         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 232     }
 233 }
 234
 235 static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
 236                                        I2CBus **i2c_bus, ISABus **p_isa_bus)
 237 {
 238     qemu_irq *i8259;
 239     ISABus *isa_bus;
 240     PCIDevice *dev;
 241
 242     isa_bus = vt82c686b_isa_init(pci_bus, PCI_DEVFN(slot, 0));
 243     if (!isa_bus) {
 244         fprintf(stderr, "vt82c686b_init error\n");
 245         exit(1);
 246     }
 247     *p_isa_bus = isa_bus;
 248     /* Interrupt controller */
 249     /* The 8259 -> IP5  */
 250     i8259 = i8259_init(isa_bus, intc);
 251     isa_bus_irqs(isa_bus, i8259);
 252     /* init other devices */
 253     i8254_pit_init(isa_bus, 0x40, 0, NULL);
 254     i8257_dma_init(isa_bus, 0);
 255     /* Super I/O */
 256     isa_create_simple(isa_bus, TYPE_VT82C686B_SUPERIO);
 257
 258     dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide");
 259     pci_ide_create_devs(dev);
 260
 261     pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci");
 262     pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci");
 263
 264     *i2c_bus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(slot, 4), 0xeee1, NULL);
 265
 266     /* Audio support */
 267     vt82c686b_ac97_init(pci_bus, PCI_DEVFN(slot, 5));
 268     vt82c686b_mc97_init(pci_bus, PCI_DEVFN(slot, 6));
 269 }
 270
 271 /* Network support */
 272 static void network_init(PCIBus *pci_bus)
 273 {
 274     int i;
 275
 276     for (i = 0; i < nb_nics; i++) {
 277         NICInfo *nd = &nd_table[i];
 278         const char *default_devaddr = NULL;
 279
 280         if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 281             /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */
 282             default_devaddr = "07";
 283         }
 284
 285         pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 286     }
 287 }
 288
 289 static void mips_fuloong2e_init(MachineState *machine)
 290 {
 291     const char *kernel_filename = machine->kernel_filename;
 292     const char *kernel_cmdline = machine->kernel_cmdline;
 293     const char *initrd_filename = machine->initrd_filename;
 294     char *filename;
 295     MemoryRegion *address_space_mem = get_system_memory();
 296     MemoryRegion *bios = g_new(MemoryRegion, 1);
 297     long bios_size;
 298     uint8_t *spd_data;
 299     int64_t kernel_entry;
 300     PCIDevice *pci_dev;
 301     PCIBus *pci_bus;
 302     ISABus *isa_bus;
 303     I2CBus *smbus;
 304     MIPSCPU *cpu;
 305     CPUMIPSState *env;
 306     DeviceState *dev;
 307
 308     /* init CPUs */
 309     cpu = MIPS_CPU(cpu_create(machine->cpu_type));
 310     env = &cpu->env;
 311
 312     qemu_register_reset(main_cpu_reset, cpu);
 313
 314     /* TODO: support more than 256M RAM as highmem */
 315     if (machine->ram_size != 256 * MiB) {
 316         error_report("Invalid RAM size, should be 256MB");
 317         exit(EXIT_FAILURE);
 318     }
 319     memory_region_add_subregion(address_space_mem, 0, machine->ram);
 320
 321     /* Boot ROM */
 322     memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
 323                            &error_fatal);
 324     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 325
 326     /*
 327      * We do not support flash operation, just loading pmon.bin as raw BIOS.
 328      * Please use -L to set the BIOS path and -bios to set bios name.
 329      */
 330
 331     if (kernel_filename) {
 332         loaderparams.ram_size = machine->ram_size;
 333         loaderparams.kernel_filename = kernel_filename;
 334         loaderparams.kernel_cmdline = kernel_cmdline;
 335         loaderparams.initrd_filename = initrd_filename;
 336         kernel_entry = load_kernel(env);
 337         write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 338     } else {
 339         if (bios_name == NULL) {
 340                 bios_name = FULOONG_BIOSNAME;
 341         }
 342         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 343         if (filename) {
 344             bios_size = load_image_targphys(filename, 0x1fc00000LL,
 345                                             BIOS_SIZE);
 346             g_free(filename);
 347         } else {
 348             bios_size = -1;
 349         }
 350
 351         if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 352             !kernel_filename && !qtest_enabled()) {
 353             error_report("Could not load MIPS bios '%s'", bios_name);
 354             exit(1);
 355         }
 356     }
 357
 358     /* Init internal devices */
 359     cpu_mips_irq_init_cpu(cpu);
 360     cpu_mips_clock_init(cpu);
 361
 362     /* North bridge, Bonito --> IP2 */
 363     pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 364
 365     /* South bridge -> IP5 */
 366     vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5],
 367                                &smbus, &isa_bus);
 368
 369     /* GPU */
 370     if (vga_interface_type != VGA_NONE) {
 371         pci_dev = pci_new(-1, "ati-vga");
 372         dev = DEVICE(pci_dev);
 373         qdev_prop_set_uint32(dev, "vgamem_mb", 16);
 374         qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
 375         pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
 376     }
 377
 378     /* Populate SPD eeprom data */
 379     spd_data = spd_data_generate(DDR, machine->ram_size);
 380     smbus_eeprom_init_one(smbus, 0x50, spd_data);
 381
 382     mc146818_rtc_init(isa_bus, 2000, NULL);
 383
 384     /* Network card: RTL8139D */
 385     network_init(pci_bus);
 386 }
 387
 388 static void mips_fuloong2e_machine_init(MachineClass *mc)
 389 {
 390     mc->desc = "Fuloong 2e mini pc";
 391     mc->alias = "fulong2e";             /* Incorrect name used up to QEMU 4.2 */
 392     mc->init = mips_fuloong2e_init;
 393     mc->block_default_type = IF_IDE;
 394     mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 395     mc->default_ram_size = 256 * MiB;
 396     mc->default_ram_id = "fuloong2e.ram";
 397     mc->minimum_page_bits = 14;
 398 }
 399
 400 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)