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/mips/cpudevs.h"
  34 #include "hw/pci/pci.h"
  35 #include "hw/loader.h"
  36 #include "hw/ide/pci.h"
  37 #include "hw/qdev-properties.h"
  38 #include "elf.h"
  39 #include "hw/isa/vt82c686.h"
  40 #include "sysemu/qtest.h"
  41 #include "sysemu/reset.h"
  42 #include "sysemu/sysemu.h"
  43 #include "qemu/error-report.h"
  44
  45 #define ENVP_PADDR              0x2000
  46 #define ENVP_VADDR              cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR)
  47 #define ENVP_NB_ENTRIES         16
  48 #define ENVP_ENTRY_SIZE         256
  49
  50 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
  51 #define BIOS_SIZE               (512 * KiB)
  52
  53 /*
  54  * PMON is not part of qemu and released with BSD license, anyone
  55  * who want to build a pmon binary please first git-clone the source
  56  * from the git repository at:
  57  * https://github.com/loongson-community/pmon
  58  */
  59 #define FULOONG_BIOSNAME "pmon_2e.bin"
  60
  61 /* PCI SLOT in Fuloong 2e */
  62 #define FULOONG2E_VIA_SLOT        5
  63 #define FULOONG2E_ATI_SLOT        6
  64 #define FULOONG2E_RTL8139_SLOT    7
  65
  66 static struct _loaderparams {
  67     int ram_size;
  68     const char *kernel_filename;
  69     const char *kernel_cmdline;
  70     const char *initrd_filename;
  71 } loaderparams;
  72
  73 static void G_GNUC_PRINTF(3, 4) prom_set(uint32_t *prom_buf, int index,
  74                                         const char *string, ...)
  75 {
  76     va_list ap;
  77     int32_t table_addr;
  78
  79     if (index >= ENVP_NB_ENTRIES) {
  80         return;
  81     }
  82
  83     if (string == NULL) {
  84         prom_buf[index] = 0;
  85         return;
  86     }
  87
  88     table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
  89     prom_buf[index] = tswap32(ENVP_VADDR + table_addr);
  90
  91     va_start(ap, string);
  92     vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
  93     va_end(ap);
  94 }
  95
  96 static uint64_t load_kernel(MIPSCPU *cpu)
  97 {
  98     uint64_t kernel_entry, kernel_high, initrd_size;
  99     int index = 0;
 100     long kernel_size;
 101     ram_addr_t initrd_offset;
 102     uint32_t *prom_buf;
 103     long prom_size;
 104
 105     kernel_size = load_elf(loaderparams.kernel_filename, NULL,
 106                            cpu_mips_kseg0_to_phys, NULL,
 107                            &kernel_entry, NULL,
 108                            &kernel_high, NULL,
 109                            0, EM_MIPS, 1, 0);
 110     if (kernel_size < 0) {
 111         error_report("could not load kernel '%s': %s",
 112                      loaderparams.kernel_filename,
 113                      load_elf_strerror(kernel_size));
 114         exit(1);
 115     }
 116
 117     /* load initrd */
 118     initrd_size = 0;
 119     initrd_offset = 0;
 120     if (loaderparams.initrd_filename) {
 121         initrd_size = get_image_size(loaderparams.initrd_filename);
 122         if (initrd_size > 0) {
 123             initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
 124             if (initrd_offset + initrd_size > loaderparams.ram_size) {
 125                 error_report("memory too small for initial ram disk '%s'",
 126                              loaderparams.initrd_filename);
 127                 exit(1);
 128             }
 129             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 130                                               initrd_offset,
 131                                               loaderparams.ram_size - initrd_offset);
 132         }
 133         if (initrd_size == (target_ulong) -1) {
 134             error_report("could not load initial ram disk '%s'",
 135                          loaderparams.initrd_filename);
 136             exit(1);
 137         }
 138     }
 139
 140     /* Setup prom parameters. */
 141     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 142     prom_buf = g_malloc(prom_size);
 143
 144     prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 145     if (initrd_size > 0) {
 146         prom_set(prom_buf, index++,
 147                  "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
 148                  cpu_mips_phys_to_kseg0(NULL, initrd_offset),
 149                  initrd_size, 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=%u", clock_get_hz(cpu->clock));
 157     prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
 158     prom_set(prom_buf, index++, NULL);
 159
 160     rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR);
 161
 162     g_free(prom_buf);
 163     return kernel_entry;
 164 }
 165
 166 static void write_bootloader(CPUMIPSState *env, uint8_t *base,
 167                              uint64_t kernel_addr)
 168 {
 169     uint32_t *p;
 170
 171     /* Small bootloader */
 172     p = (uint32_t *)base;
 173
 174     /* j 0x1fc00040 */
 175     stl_p(p++, 0x0bf00010);
 176     /* nop */
 177     stl_p(p++, 0x00000000);
 178
 179     /* Second part of the bootloader */
 180     p = (uint32_t *)(base + 0x040);
 181
 182     bl_gen_jump_kernel((void **)&p,
 183                        true, ENVP_VADDR - 64,
 184                        true, 2, true, ENVP_VADDR,
 185                        true, ENVP_VADDR + 8,
 186                        true, loaderparams.ram_size,
 187                        kernel_addr);
 188 }
 189
 190 static void main_cpu_reset(void *opaque)
 191 {
 192     MIPSCPU *cpu = opaque;
 193     CPUMIPSState *env = &cpu->env;
 194
 195     cpu_reset(CPU(cpu));
 196     /* TODO: 2E reset stuff */
 197     if (loaderparams.kernel_filename) {
 198         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 199     }
 200 }
 201
 202 /* Network support */
 203 static void network_init(PCIBus *pci_bus)
 204 {
 205     int i;
 206
 207     for (i = 0; i < nb_nics; i++) {
 208         NICInfo *nd = &nd_table[i];
 209         const char *default_devaddr = NULL;
 210
 211         if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 212             /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */
 213             default_devaddr = "07";
 214         }
 215
 216         pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 217     }
 218 }
 219
 220 static void mips_fuloong2e_init(MachineState *machine)
 221 {
 222     const char *kernel_filename = machine->kernel_filename;
 223     const char *kernel_cmdline = machine->kernel_cmdline;
 224     const char *initrd_filename = machine->initrd_filename;
 225     char *filename;
 226     MemoryRegion *address_space_mem = get_system_memory();
 227     MemoryRegion *bios = g_new(MemoryRegion, 1);
 228     long bios_size;
 229     uint8_t *spd_data;
 230     uint64_t kernel_entry;
 231     PCIDevice *pci_dev;
 232     PCIBus *pci_bus;
 233     I2CBus *smbus;
 234     Clock *cpuclk;
 235     MIPSCPU *cpu;
 236     CPUMIPSState *env;
 237     DeviceState *dev;
 238
 239     cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
 240     clock_set_hz(cpuclk, 533080000); /* ~533 MHz */
 241
 242     /* init CPUs */
 243     cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
 244     env = &cpu->env;
 245
 246     qemu_register_reset(main_cpu_reset, cpu);
 247
 248     /* TODO: support more than 256M RAM as highmem */
 249     if (machine->ram_size != 256 * MiB) {
 250         error_report("Invalid RAM size, should be 256MB");
 251         exit(EXIT_FAILURE);
 252     }
 253     memory_region_add_subregion(address_space_mem, 0, machine->ram);
 254
 255     /* Boot ROM */
 256     memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
 257                            &error_fatal);
 258     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 259
 260     /*
 261      * We do not support flash operation, just loading pmon.bin as raw BIOS.
 262      * Please use -L to set the BIOS path and -bios to set bios name.
 263      */
 264
 265     if (kernel_filename) {
 266         loaderparams.ram_size = machine->ram_size;
 267         loaderparams.kernel_filename = kernel_filename;
 268         loaderparams.kernel_cmdline = kernel_cmdline;
 269         loaderparams.initrd_filename = initrd_filename;
 270         kernel_entry = load_kernel(cpu);
 271         write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 272     } else {
 273         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 274                                   machine->firmware ?: FULOONG_BIOSNAME);
 275         if (filename) {
 276             bios_size = load_image_targphys(filename, 0x1fc00000LL,
 277                                             BIOS_SIZE);
 278             g_free(filename);
 279         } else {
 280             bios_size = -1;
 281         }
 282
 283         if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 284             machine->firmware && !qtest_enabled()) {
 285             error_report("Could not load MIPS bios '%s'", machine->firmware);
 286             exit(1);
 287         }
 288     }
 289
 290     /* Init internal devices */
 291     cpu_mips_irq_init_cpu(cpu);
 292     cpu_mips_clock_init(cpu);
 293
 294     /* North bridge, Bonito --> IP2 */
 295     pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 296
 297     /* South bridge -> IP5 */
 298     pci_dev = pci_create_simple_multifunction(pci_bus,
 299                                               PCI_DEVFN(FULOONG2E_VIA_SLOT, 0),
 300                                               true, TYPE_VT82C686B_ISA);
 301     object_property_add_alias(OBJECT(machine), "rtc-time",
 302                               object_resolve_path_component(OBJECT(pci_dev),
 303                                                             "rtc"),
 304                               "date");
 305     qdev_connect_gpio_out(DEVICE(pci_dev), 0, env->irq[5]);
 306
 307     dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "ide"));
 308     pci_ide_create_devs(PCI_DEVICE(dev));
 309
 310     dev = DEVICE(object_resolve_path_component(OBJECT(pci_dev), "pm"));
 311     smbus = I2C_BUS(qdev_get_child_bus(dev, "i2c"));
 312
 313     /* GPU */
 314     if (vga_interface_type != VGA_NONE) {
 315         vga_interface_created = true;
 316         pci_dev = pci_new(-1, "ati-vga");
 317         dev = DEVICE(pci_dev);
 318         qdev_prop_set_uint32(dev, "vgamem_mb", 16);
 319         qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
 320         pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
 321     }
 322
 323     /* Populate SPD eeprom data */
 324     spd_data = spd_data_generate(DDR, machine->ram_size);
 325     smbus_eeprom_init_one(smbus, 0x50, spd_data);
 326
 327     /* Network card: RTL8139D */
 328     network_init(pci_bus);
 329 }
 330
 331 static void mips_fuloong2e_machine_init(MachineClass *mc)
 332 {
 333     mc->desc = "Fuloong 2e mini pc";
 334     mc->init = mips_fuloong2e_init;
 335     mc->block_default_type = IF_IDE;
 336     mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 337     mc->default_ram_size = 256 * MiB;
 338     mc->default_ram_id = "fuloong2e.ram";
 339     mc->minimum_page_bits = 14;
 340 }
 341
 342 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)