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 "net/net.h"
  29 #include "hw/boards.h"
  30 #include "hw/i2c/smbus_eeprom.h"
  31 #include "hw/block/flash.h"
  32 #include "hw/mips/mips.h"
  33 #include "hw/mips/bootloader.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 "hw/qdev-properties.h"
  40 #include "elf.h"
  41 #include "hw/isa/vt82c686.h"
  42 #include "exec/address-spaces.h"
  43 #include "sysemu/qtest.h"
  44 #include "sysemu/reset.h"
  45 #include "sysemu/sysemu.h"
  46 #include "qemu/error-report.h"
  47
  48 #define ENVP_PADDR              0x2000
  49 #define ENVP_VADDR              cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR)
  50 #define ENVP_NB_ENTRIES         16
  51 #define ENVP_ENTRY_SIZE         256
  52
  53 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
  54 #define BIOS_SIZE               (512 * KiB)
  55 #define MAX_IDE_BUS             2
  56
  57 /*
  58  * PMON is not part of qemu and released with BSD license, anyone
  59  * who want to build a pmon binary please first git-clone the source
  60  * from the git repository at:
  61  * https://github.com/loongson-community/pmon
  62  */
  63 #define FULOONG_BIOSNAME "pmon_2e.bin"
  64
  65 /* PCI SLOT in Fuloong 2e */
  66 #define FULOONG2E_VIA_SLOT        5
  67 #define FULOONG2E_ATI_SLOT        6
  68 #define FULOONG2E_RTL8139_SLOT    7
  69
  70 static struct _loaderparams {
  71     int ram_size;
  72     const char *kernel_filename;
  73     const char *kernel_cmdline;
  74     const char *initrd_filename;
  75 } loaderparams;
  76
  77 static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index,
  78                                         const char *string, ...)
  79 {
  80     va_list ap;
  81     int32_t table_addr;
  82
  83     if (index >= ENVP_NB_ENTRIES) {
  84         return;
  85     }
  86
  87     if (string == NULL) {
  88         prom_buf[index] = 0;
  89         return;
  90     }
  91
  92     table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;
  93     prom_buf[index] = tswap32(ENVP_VADDR + table_addr);
  94
  95     va_start(ap, string);
  96     vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);
  97     va_end(ap);
  98 }
  99
 100 static uint64_t load_kernel(MIPSCPU *cpu)
 101 {
 102     uint64_t kernel_entry, kernel_high, initrd_size;
 103     int index = 0;
 104     long kernel_size;
 105     ram_addr_t initrd_offset;
 106     uint32_t *prom_buf;
 107     long prom_size;
 108
 109     kernel_size = load_elf(loaderparams.kernel_filename, NULL,
 110                            cpu_mips_kseg0_to_phys, NULL,
 111                            &kernel_entry, NULL,
 112                            &kernel_high, NULL,
 113                            0, EM_MIPS, 1, 0);
 114     if (kernel_size < 0) {
 115         error_report("could not load kernel '%s': %s",
 116                      loaderparams.kernel_filename,
 117                      load_elf_strerror(kernel_size));
 118         exit(1);
 119     }
 120
 121     /* load initrd */
 122     initrd_size = 0;
 123     initrd_offset = 0;
 124     if (loaderparams.initrd_filename) {
 125         initrd_size = get_image_size(loaderparams.initrd_filename);
 126         if (initrd_size > 0) {
 127             initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
 128             if (initrd_offset + initrd_size > loaderparams.ram_size) {
 129                 error_report("memory too small for initial ram disk '%s'",
 130                              loaderparams.initrd_filename);
 131                 exit(1);
 132             }
 133             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 134                                               initrd_offset,
 135                                               loaderparams.ram_size - initrd_offset);
 136         }
 137         if (initrd_size == (target_ulong) -1) {
 138             error_report("could not load initial ram disk '%s'",
 139                          loaderparams.initrd_filename);
 140             exit(1);
 141         }
 142     }
 143
 144     /* Setup prom parameters. */
 145     prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);
 146     prom_buf = g_malloc(prom_size);
 147
 148     prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);
 149     if (initrd_size > 0) {
 150         prom_set(prom_buf, index++,
 151                  "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
 152                  cpu_mips_phys_to_kseg0(NULL, initrd_offset),
 153                  initrd_size, loaderparams.kernel_cmdline);
 154     } else {
 155         prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);
 156     }
 157
 158     /* Setup minimum environment variables */
 159     prom_set(prom_buf, index++, "busclock=33000000");
 160     prom_set(prom_buf, index++, "cpuclock=%u", clock_get_hz(cpu->clock));
 161     prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
 162     prom_set(prom_buf, index++, NULL);
 163
 164     rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR);
 165
 166     g_free(prom_buf);
 167     return kernel_entry;
 168 }
 169
 170 static void write_bootloader(CPUMIPSState *env, uint8_t *base,
 171                              uint64_t kernel_addr)
 172 {
 173     uint32_t *p;
 174
 175     /* Small bootloader */
 176     p = (uint32_t *)base;
 177
 178     /* j 0x1fc00040 */
 179     stl_p(p++, 0x0bf00010);
 180     /* nop */
 181     stl_p(p++, 0x00000000);
 182
 183     /* Second part of the bootloader */
 184     p = (uint32_t *)(base + 0x040);
 185
 186     bl_gen_jump_kernel(&p, ENVP_VADDR - 64, 2, ENVP_VADDR, ENVP_VADDR + 8,
 187                        loaderparams.ram_size, 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 static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq intc,
 203                                        I2CBus **i2c_bus)
 204 {
 205     PCIDevice *dev;
 206
 207     dev = pci_create_simple_multifunction(pci_bus, PCI_DEVFN(slot, 0), true,
 208                                           TYPE_VT82C686B_ISA);
 209     qdev_connect_gpio_out(DEVICE(dev), 0, intc);
 210
 211     dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 1), "via-ide");
 212     pci_ide_create_devs(dev);
 213
 214     pci_create_simple(pci_bus, PCI_DEVFN(slot, 2), "vt82c686b-usb-uhci");
 215     pci_create_simple(pci_bus, PCI_DEVFN(slot, 3), "vt82c686b-usb-uhci");
 216
 217     dev = pci_create_simple(pci_bus, PCI_DEVFN(slot, 4), TYPE_VT82C686B_PM);
 218     *i2c_bus = I2C_BUS(qdev_get_child_bus(DEVICE(dev), "i2c"));
 219
 220     /* Audio support */
 221     pci_create_simple(pci_bus, PCI_DEVFN(slot, 5), TYPE_VIA_AC97);
 222     pci_create_simple(pci_bus, PCI_DEVFN(slot, 6), TYPE_VIA_MC97);
 223 }
 224
 225 /* Network support */
 226 static void network_init(PCIBus *pci_bus)
 227 {
 228     int i;
 229
 230     for (i = 0; i < nb_nics; i++) {
 231         NICInfo *nd = &nd_table[i];
 232         const char *default_devaddr = NULL;
 233
 234         if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {
 235             /* The Fuloong board has a RTL8139 card using PCI SLOT 7 */
 236             default_devaddr = "07";
 237         }
 238
 239         pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
 240     }
 241 }
 242
 243 static void mips_fuloong2e_init(MachineState *machine)
 244 {
 245     const char *kernel_filename = machine->kernel_filename;
 246     const char *kernel_cmdline = machine->kernel_cmdline;
 247     const char *initrd_filename = machine->initrd_filename;
 248     char *filename;
 249     MemoryRegion *address_space_mem = get_system_memory();
 250     MemoryRegion *bios = g_new(MemoryRegion, 1);
 251     long bios_size;
 252     uint8_t *spd_data;
 253     uint64_t kernel_entry;
 254     PCIDevice *pci_dev;
 255     PCIBus *pci_bus;
 256     I2CBus *smbus;
 257     Clock *cpuclk;
 258     MIPSCPU *cpu;
 259     CPUMIPSState *env;
 260     DeviceState *dev;
 261
 262     cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
 263     clock_set_hz(cpuclk, 533080000); /* ~533 MHz */
 264
 265     /* init CPUs */
 266     cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
 267     env = &cpu->env;
 268
 269     qemu_register_reset(main_cpu_reset, cpu);
 270
 271     /* TODO: support more than 256M RAM as highmem */
 272     if (machine->ram_size != 256 * MiB) {
 273         error_report("Invalid RAM size, should be 256MB");
 274         exit(EXIT_FAILURE);
 275     }
 276     memory_region_add_subregion(address_space_mem, 0, machine->ram);
 277
 278     /* Boot ROM */
 279     memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
 280                            &error_fatal);
 281     memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
 282
 283     /*
 284      * We do not support flash operation, just loading pmon.bin as raw BIOS.
 285      * Please use -L to set the BIOS path and -bios to set bios name.
 286      */
 287
 288     if (kernel_filename) {
 289         loaderparams.ram_size = machine->ram_size;
 290         loaderparams.kernel_filename = kernel_filename;
 291         loaderparams.kernel_cmdline = kernel_cmdline;
 292         loaderparams.initrd_filename = initrd_filename;
 293         kernel_entry = load_kernel(cpu);
 294         write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
 295     } else {
 296         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
 297                                   machine->firmware ?: FULOONG_BIOSNAME);
 298         if (filename) {
 299             bios_size = load_image_targphys(filename, 0x1fc00000LL,
 300                                             BIOS_SIZE);
 301             g_free(filename);
 302         } else {
 303             bios_size = -1;
 304         }
 305
 306         if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
 307             machine->firmware && !qtest_enabled()) {
 308             error_report("Could not load MIPS bios '%s'", machine->firmware);
 309             exit(1);
 310         }
 311     }
 312
 313     /* Init internal devices */
 314     cpu_mips_irq_init_cpu(cpu);
 315     cpu_mips_clock_init(cpu);
 316
 317     /* North bridge, Bonito --> IP2 */
 318     pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));
 319
 320     /* South bridge -> IP5 */
 321     vt82c686b_southbridge_init(pci_bus, FULOONG2E_VIA_SLOT, env->irq[5],
 322                                &smbus);
 323
 324     /* GPU */
 325     if (vga_interface_type != VGA_NONE) {
 326         pci_dev = pci_new(-1, "ati-vga");
 327         dev = DEVICE(pci_dev);
 328         qdev_prop_set_uint32(dev, "vgamem_mb", 16);
 329         qdev_prop_set_uint16(dev, "x-device-id", 0x5159);
 330         pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
 331     }
 332
 333     /* Populate SPD eeprom data */
 334     spd_data = spd_data_generate(DDR, machine->ram_size);
 335     smbus_eeprom_init_one(smbus, 0x50, spd_data);
 336
 337     /* Network card: RTL8139D */
 338     network_init(pci_bus);
 339 }
 340
 341 static void mips_fuloong2e_machine_init(MachineClass *mc)
 342 {
 343     mc->desc = "Fuloong 2e mini pc";
 344     mc->init = mips_fuloong2e_init;
 345     mc->block_default_type = IF_IDE;
 346     mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
 347     mc->default_ram_size = 256 * MiB;
 348     mc->default_ram_id = "fuloong2e.ram";
 349     mc->minimum_page_bits = 14;
 350 }
 351
 352 DEFINE_MACHINE("fuloong2e", mips_fuloong2e_machine_init)