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/datadir.h"
  23 #include "qemu/units.h"
  24 #include "qapi/error.h"
  25 #include "cpu.h"
  26 #include "hw/clock.h"
  27 #include "net/net.h"
  28 #include "hw/boards.h"
  29 #include "hw/i2c/smbus_eeprom.h"
  30 #include "hw/block/flash.h"
  31 #include "hw/mips/mips.h"
  32 #include "hw/mips/bootloader.h"
  33 #include "hw/pci/pci.h"
  34 #include "hw/loader.h"
  35 #include "hw/ide/pci.h"
  36 #include "hw/qdev-properties.h"
  37 #include "elf.h"
  38 #include "hw/isa/vt82c686.h"
  39 #include "sysemu/qtest.h"
  40 #include "sysemu/reset.h"
  41 #include "sysemu/sysemu.h"
  42 #include "qemu/error-report.h"
  43
  44 #define ENVP_PADDR              0x2000
  45 #define ENVP_VADDR              cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR)
  46 #define ENVP_NB_ENTRIES         16
  47 #define ENVP_ENTRY_SIZE         256
  48
  49 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
  50 #define BIOS_SIZE               (512 * KiB)
  51
  52 /*
  53  * PMON is not part of qemu and released with BSD license, anyone
  54  * who want to build a pmon binary please first git-clone the source
  55  * from the git repository at:
  56  * https://github.com/loongson-community/pmon
  57  */
  58 #define FULOONG_BIOSNAME "pmon_2e.bin"
  59
  60 /* PCI SLOT in Fuloong 2e */
  61 #define FULOONG2E_VIA_SLOT        5
  62 #define FULOONG2E_ATI_SLOT        6
  63 #define FULOONG2E_RTL8139_SLOT    7
  64
  65 static struct _loaderparams {
  66     int ram_size;
  67     const char *kernel_filename;
  68     const char *kernel_cmdline;
  69     const char *initrd_filename;
  70 } loaderparams;
  71
  72 static void G_GNUC_PRINTF(3, 4) prom_set(uint32_t *prom_buf, int index,
  73                                         const char *string, ...)
  74 {
  75     va_list ap;
  76     int32_t table_addr;
  77
  78     if (index >= ENVP_NB_ENTRIES) {
  79         return;
  80     }
  81
  82     if (string == NULL) {
  83         prom_buf[index] = 0;
  84         return;
  85     }
  86
  87     table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
  88     prom_buf[index] = tswap32(ENVP_VADDR + table_addr);
  89
  90     va_start(ap, string);
  91     vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
  92     va_end(ap);
  93 }
  94
  95 static uint64_t load_kernel(MIPSCPU *cpu)
  96 {
  97     uint64_t kernel_entry, kernel_high, initrd_size;
  98     int index = 0;
  99     long kernel_size;
 100     ram_addr_t initrd_offset;
 101     uint32_t *prom_buf;
 102     long prom_size;
 103
 104     kernel_size = load_elf(loaderparams.kernel_filename, NULL,
 105                            cpu_mips_kseg0_to_phys, NULL,
 106                            &kernel_entry, NULL,
 107                            &kernel_high, NULL,
 108                            0, EM_MIPS, 1, 0);
 109     if (kernel_size < 0) {
 110         error_report("could not load kernel '%s': %s",
 111                      loaderparams.kernel_filename,
 112                      load_elf_strerror(kernel_size));
 113         exit(1);
 114     }
 115
 116     /* load initrd */
 117     initrd_size = 0;
 118     initrd_offset = 0;
 119     if (loaderparams.initrd_filename) {
 120         initrd_size = get_image_size(loaderparams.initrd_filename);
 121         if (initrd_size > 0) {
 122             initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
 123             if (initrd_offset + initrd_size > loaderparams.ram_size) {
 124                 error_report("memory too small for initial ram disk '%s'",
 125                              loaderparams.initrd_filename);
 126                 exit(1);
 127             }
 128             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 129                                               initrd_offset,
 130                                               loaderparams.ram_size - initrd_offset);
 131         }
 132         if (initrd_size == (target_ulong) -1) {
 133             error_report("could not load initial ram disk '%s'",
 134                          loaderparams.initrd_filename);
 135             exit(1);
 136         }
 137     }
 138
 139     /* Setup prom parameters. */
 140     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 141     prom_buf = g_malloc(prom_size);
 142
 143     prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 144     if (initrd_size > 0) {
 145         prom_set(prom_buf, index++,
 146                  "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
 147                  cpu_mips_phys_to_kseg0(NULL, initrd_offset),
 148                  initrd_size, loaderparams.kernel_cmdline);
 149     } else {
 150         prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 151     }
 152
 153     /* Setup minimum environment variables */
 154     prom_set(prom_buf, index++, "busclock=33000000");
 155     prom_set(prom_buf, index++, "cpuclock=%u", clock_get_hz(cpu->clock));
 156     prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
 157     prom_set(prom_buf, index++, NULL);
 158
 159     rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR);
 160
 161     g_free(prom_buf);
 162     return kernel_entry;
 163 }
 164
 165 static void write_bootloader(CPUMIPSState *env, uint8_t *base,
 166                              uint64_t kernel_addr)
 167 {
 168     uint32_t *p;
 169
 170     /* Small bootloader */
 171     p = (uint32_t *)base;
 172
 173     /* j 0x1fc00040 */
 174     stl_p(p++, 0x0bf00010);
 175     /* nop */
 176     stl_p(p++, 0x00000000);
 177
 178     /* Second part of the bootloader */
 179     p = (uint32_t *)(base + 0x040);
 180
 181     bl_gen_jump_kernel((void **)&p,
 182                        true, ENVP_VADDR - 64,
 183                        true, 2, true, ENVP_VADDR,
 184                        true, ENVP_VADDR + 8,
 185                        true, loaderparams.ram_size,
 186                        kernel_addr);
 187 }
 188
 189 static void main_cpu_reset(void *opaque)
 190 {
 191     MIPSCPU *cpu = opaque;
 192     CPUMIPSState *env = &cpu->env;
 193
 194     cpu_reset(CPU(cpu));
 195     /* TODO: 2E reset stuff */
 196     if (loaderparams.kernel_filename) {
 197         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 198     }
 199 }
 200
 201 /* Network support */
 202 static void network_init(PCIBus *pci_bus)
 203 {
 204     /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */
 205     pci_init_nic_in_slot(pci_bus, "rtl8139", NULL, "07");
 206     pci_init_nic_devices(pci_bus, "rtl8139");
 207 }
 208
 209 static void mips_fuloong2e_init(MachineState *machine)
 210 {
 211     const char *kernel_filename = machine->kernel_filename;
 212     const char *kernel_cmdline = machine->kernel_cmdline;
 213     const char *initrd_filename = machine->initrd_filename;
 214     char *filename;
 215     MemoryRegion *address_space_mem = get_system_memory();
 216     MemoryRegion *bios = g_new(MemoryRegion, 1);
 217     long bios_size;
 218     uint8_t *spd_data;
 219     uint64_t kernel_entry;
 220     PCIDevice *pci_dev;
 221     PCIBus *pci_bus;
 222     I2CBus *smbus;
 223     Clock *cpuclk;
 224     MIPSCPU *cpu;
 225     CPUMIPSState *env;
 226     DeviceState *dev;
 227
 228     cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
 229     clock_set_hz(cpuclk, 533080000); /* ~533 MHz */
 230
 231     /* init CPUs */
 232     cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
 233     env = &cpu->env;
 234
 235     qemu_register_reset(main_cpu_reset, cpu);
 236
 237     /* TODO: support more than 256M RAM as highmem */
 238     if (machine->ram_size != 256 * MiB) {
 239         error_report("Invalid RAM size, should be 256MB");
 240         exit(EXIT_FAILURE);
 241     }
 242     memory_region_add_subregion(address_space_mem, 0, machine->ram);
 243
 244     /* Boot ROM */
 245     memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
 246                            &error_fatal);
 247     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 248
 249     /*
 250      * We do not support flash operation, just loading pmon.bin as raw BIOS.
 251      * Please use -L to set the BIOS path and -bios to set bios name.
 252      */
 253
 254     if (kernel_filename) {
 255         loaderparams.ram_size = machine->ram_size;
 256         loaderparams.kernel_filename = kernel_filename;
 257         loaderparams.kernel_cmdline = kernel_cmdline;
 258         loaderparams.initrd_filename = initrd_filename;
 259         kernel_entry = load_kernel(cpu);
 260         write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 261     } else {
 262         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 263                                   machine->firmware ?: FULOONG_BIOSNAME);
 264         if (filename) {
 265             bios_size = load_image_targphys(filename, 0x1fc00000LL,
 266                                             BIOS_SIZE);
 267             g_free(filename);
 268         } else {
 269             bios_size = -1;
 270         }
 271
 272         if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 273             machine->firmware && !qtest_enabled()) {
 274             error_report("Could not load MIPS bios '%s'", machine->firmware);
 275             exit(1);
 276         }
 277     }
 278
 279     /* Init internal devices */
 280     cpu_mips_irq_init_cpu(cpu);
 281     cpu_mips_clock_init(cpu);
 282
 283     /* North bridge, Bonito --> IP2 */
 284     pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 285
 286     /* South bridge -> IP5 */
 287     pci_dev = pci_new_multifunction(PCI_DEVFN(FULOONG2E_VIA_SLOT, 0),
 288                                     TYPE_VT82C686B_ISA);
 289
 290     /* Set properties on individual devices before realizing the south bridge */
 291     if (machine->audiodev) {
 292         dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "ac97"));
 293         qdev_prop_set_string(dev, "audiodev", machine->audiodev);
 294     }
 295
 296     pci_realize_and_unref(pci_dev, pci_bus, &error_abort);
 297
 298     object_property_add_alias(OBJECT(machine), "rtc-time",
 299                               object_resolve_path_component(OBJECT(pci_dev),
 300                                                             "rtc"),
 301                               "date");
 302     qdev_connect_gpio_out_named(DEVICE(pci_dev), "intr", 0, env->irq[5]);
 303
 304     dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "ide"));
 305     pci_ide_create_devs(PCI_DEVICE(dev));
 306
 307     dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "pm"));
 308     smbus = I2C_BUS(qdev_get_child_bus(dev, "i2c"));
 309
 310     /* GPU */
 311     if (vga_interface_type != VGA_NONE) {
 312         vga_interface_created = true;
 313         pci_dev = pci_new(-1, "ati-vga");
 314         dev = DEVICE(pci_dev);
 315         qdev_prop_set_uint32(dev, "vgamem_mb", 16);
 316         qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
 317         pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
 318     }
 319
 320     /* Populate SPD eeprom data */
 321     spd_data = spd_data_generate(DDR, machine->ram_size);
 322     smbus_eeprom_init_one(smbus, 0x50, spd_data);
 323
 324     /* Network card: RTL8139D */
 325     network_init(pci_bus);
 326 }
 327
 328 static void mips_fuloong2e_machine_init(MachineClass *mc)
 329 {
 330     mc->desc = "Fuloong 2e mini pc";
 331     mc->init = mips_fuloong2e_init;
 332     mc->block_default_type = IF_IDE;
 333     mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 334     mc->default_ram_size = 256 * MiB;
 335     mc->default_ram_id = "fuloong2e.ram";
 336     mc->minimum_page_bits = 14;
 337     machine_add_audiodev_property(mc);
 338 }
 339
 340 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)