hw/xtensa/xtfpga.c

   1 /*
   2  * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *     * Redistributions of source code must retain the above copyright
   8  *       notice, this list of conditions and the following disclaimer.
   9  *     * Redistributions in binary form must reproduce the above copyright
  10  *       notice, this list of conditions and the following disclaimer in the
  11  *       documentation and/or other materials provided with the distribution.
  12  *     * Neither the name of the Open Source and Linux Lab nor the
  13  *       names of its contributors may be used to endorse or promote products
  14  *       derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  23  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "sysemu/sysemu.h"
  29 #include "hw/boards.h"
  30 #include "hw/loader.h"
  31 #include "elf.h"
  32 #include "exec/memory.h"
  33 #include "exec/address-spaces.h"
  34 #include "hw/char/serial.h"
  35 #include "net/net.h"
  36 #include "hw/sysbus.h"
  37 #include "hw/block/flash.h"
  38 #include "sysemu/block-backend.h"
  39 #include "sysemu/char.h"
  40 #include "sysemu/device_tree.h"
  41 #include "qemu/error-report.h"
  42 #include "bootparam.h"
  43
  44 typedef struct LxBoardDesc {
  45     hwaddr flash_base;
  46     size_t flash_size;
  47     size_t flash_boot_base;
  48     size_t flash_sector_size;
  49     size_t sram_size;
  50 } LxBoardDesc;
  51
  52 typedef struct Lx60FpgaState {
  53     MemoryRegion iomem;
  54     uint32_t leds;
  55     uint32_t switches;
  56 } Lx60FpgaState;
  57
  58 static void lx60_fpga_reset(void *opaque)
  59 {
  60     Lx60FpgaState *s = opaque;
  61
  62     s->leds = 0;
  63     s->switches = 0;
  64 }
  65
  66 static uint64_t lx60_fpga_read(void *opaque, hwaddr addr,
  67         unsigned size)
  68 {
  69     Lx60FpgaState *s = opaque;
  70
  71     switch (addr) {
  72     case 0x0: /*build date code*/
  73         return 0x09272011;
  74
  75     case 0x4: /*processor clock frequency, Hz*/
  76         return 10000000;
  77
  78     case 0x8: /*LEDs (off = 0, on = 1)*/
  79         return s->leds;
  80
  81     case 0xc: /*DIP switches (off = 0, on = 1)*/
  82         return s->switches;
  83     }
  84     return 0;
  85 }
  86
  87 static void lx60_fpga_write(void *opaque, hwaddr addr,
  88         uint64_t val, unsigned size)
  89 {
  90     Lx60FpgaState *s = opaque;
  91
  92     switch (addr) {
  93     case 0x8: /*LEDs (off = 0, on = 1)*/
  94         s->leds = val;
  95         break;
  96
  97     case 0x10: /*board reset*/
  98         if (val == 0xdead) {
  99             qemu_system_reset_request();
 100         }
 101         break;
 102     }
 103 }
 104
 105 static const MemoryRegionOps lx60_fpga_ops = {
 106     .read = lx60_fpga_read,
 107     .write = lx60_fpga_write,
 108     .endianness = DEVICE_NATIVE_ENDIAN,
 109 };
 110
 111 static Lx60FpgaState *lx60_fpga_init(MemoryRegion *address_space,
 112         hwaddr base)
 113 {
 114     Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));
 115
 116     memory_region_init_io(&s->iomem, NULL, &lx60_fpga_ops, s,
 117             "lx60.fpga", 0x10000);
 118     memory_region_add_subregion(address_space, base, &s->iomem);
 119     lx60_fpga_reset(s);
 120     qemu_register_reset(lx60_fpga_reset, s);
 121     return s;
 122 }
 123
 124 static void lx60_net_init(MemoryRegion *address_space,
 125         hwaddr base,
 126         hwaddr descriptors,
 127         hwaddr buffers,
 128         qemu_irq irq, NICInfo *nd)
 129 {
 130     DeviceState *dev;
 131     SysBusDevice *s;
 132     MemoryRegion *ram;
 133
 134     dev = qdev_create(NULL, "open_eth");
 135     qdev_set_nic_properties(dev, nd);
 136     qdev_init_nofail(dev);
 137
 138     s = SYS_BUS_DEVICE(dev);
 139     sysbus_connect_irq(s, 0, irq);
 140     memory_region_add_subregion(address_space, base,
 141             sysbus_mmio_get_region(s, 0));
 142     memory_region_add_subregion(address_space, descriptors,
 143             sysbus_mmio_get_region(s, 1));
 144
 145     ram = g_malloc(sizeof(*ram));
 146     memory_region_init_ram(ram, OBJECT(s), "open_eth.ram", 16384, &error_abort);
 147     vmstate_register_ram_global(ram);
 148     memory_region_add_subregion(address_space, buffers, ram);
 149 }
 150
 151 static uint64_t translate_phys_addr(void *opaque, uint64_t addr)
 152 {
 153     XtensaCPU *cpu = opaque;
 154
 155     return cpu_get_phys_page_debug(CPU(cpu), addr);
 156 }
 157
 158 static void lx60_reset(void *opaque)
 159 {
 160     XtensaCPU *cpu = opaque;
 161
 162     cpu_reset(CPU(cpu));
 163 }
 164
 165 static uint64_t lx60_io_read(void *opaque, hwaddr addr,
 166         unsigned size)
 167 {
 168     return 0;
 169 }
 170
 171 static void lx60_io_write(void *opaque, hwaddr addr,
 172         uint64_t val, unsigned size)
 173 {
 174 }
 175
 176 static const MemoryRegionOps lx60_io_ops = {
 177     .read = lx60_io_read,
 178     .write = lx60_io_write,
 179     .endianness = DEVICE_NATIVE_ENDIAN,
 180 };
 181
 182 static void lx_init(const LxBoardDesc *board, MachineState *machine)
 183 {
 184 #ifdef TARGET_WORDS_BIGENDIAN
 185     int be = 1;
 186 #else
 187     int be = 0;
 188 #endif
 189     MemoryRegion *system_memory = get_system_memory();
 190     XtensaCPU *cpu = NULL;
 191     CPUXtensaState *env = NULL;
 192     MemoryRegion *ram, *rom, *system_io;
 193     DriveInfo *dinfo;
 194     pflash_t *flash = NULL;
 195     QemuOpts *machine_opts = qemu_get_machine_opts();
 196     const char *cpu_model = machine->cpu_model;
 197     const char *kernel_filename = qemu_opt_get(machine_opts, "kernel");
 198     const char *kernel_cmdline = qemu_opt_get(machine_opts, "append");
 199     const char *dtb_filename = qemu_opt_get(machine_opts, "dtb");
 200     const char *initrd_filename = qemu_opt_get(machine_opts, "initrd");
 201     int n;
 202
 203     if (!cpu_model) {
 204         cpu_model = XTENSA_DEFAULT_CPU_MODEL;
 205     }
 206
 207     for (n = 0; n < smp_cpus; n++) {
 208         cpu = cpu_xtensa_init(cpu_model);
 209         if (cpu == NULL) {
 210             error_report("unable to find CPU definition '%s'",
 211                          cpu_model);
 212             exit(EXIT_FAILURE);
 213         }
 214         env = &cpu->env;
 215
 216         env->sregs[PRID] = n;
 217         qemu_register_reset(lx60_reset, cpu);
 218         /* Need MMU initialized prior to ELF loading,
 219          * so that ELF gets loaded into virtual addresses
 220          */
 221         cpu_reset(CPU(cpu));
 222     }
 223
 224     ram = g_malloc(sizeof(*ram));
 225     memory_region_init_ram(ram, NULL, "lx60.dram", machine->ram_size,
 226                            &error_abort);
 227     vmstate_register_ram_global(ram);
 228     memory_region_add_subregion(system_memory, 0, ram);
 229
 230     system_io = g_malloc(sizeof(*system_io));
 231     memory_region_init_io(system_io, NULL, &lx60_io_ops, NULL, "lx60.io",
 232                           224 * 1024 * 1024);
 233     memory_region_add_subregion(system_memory, 0xf0000000, system_io);
 234     lx60_fpga_init(system_io, 0x0d020000);
 235     if (nd_table[0].used) {
 236         lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,
 237                 xtensa_get_extint(env, 1), nd_table);
 238     }
 239
 240     if (!serial_hds[0]) {
 241         serial_hds[0] = qemu_chr_new("serial0", "null", NULL);
 242     }
 243
 244     serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0),
 245             115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
 246
 247     dinfo = drive_get(IF_PFLASH, 0, 0);
 248     if (dinfo) {
 249         flash = pflash_cfi01_register(board->flash_base,
 250                 NULL, "lx60.io.flash", board->flash_size,
 251                 blk_by_legacy_dinfo(dinfo),
 252                 board->flash_sector_size,
 253                 board->flash_size / board->flash_sector_size,
 254                 4, 0x0000, 0x0000, 0x0000, 0x0000, be);
 255         if (flash == NULL) {
 256             error_report("unable to mount pflash");
 257             exit(EXIT_FAILURE);
 258         }
 259     }
 260
 261     /* Use presence of kernel file name as 'boot from SRAM' switch. */
 262     if (kernel_filename) {
 263         uint32_t entry_point = env->pc;
 264         size_t bp_size = 3 * get_tag_size(0); /* first/last and memory tags */
 265         uint32_t tagptr = 0xfe000000 + board->sram_size;
 266         uint32_t cur_tagptr;
 267         BpMemInfo memory_location = {
 268             .type = tswap32(MEMORY_TYPE_CONVENTIONAL),
 269             .start = tswap32(0),
 270             .end = tswap32(machine->ram_size),
 271         };
 272         uint32_t lowmem_end = machine->ram_size < 0x08000000 ?
 273             machine->ram_size : 0x08000000;
 274         uint32_t cur_lowmem = QEMU_ALIGN_UP(lowmem_end / 2, 4096);
 275
 276         rom = g_malloc(sizeof(*rom));
 277         memory_region_init_ram(rom, NULL, "lx60.sram", board->sram_size,
 278                                &error_abort);
 279         vmstate_register_ram_global(rom);
 280         memory_region_add_subregion(system_memory, 0xfe000000, rom);
 281
 282         if (kernel_cmdline) {
 283             bp_size += get_tag_size(strlen(kernel_cmdline) + 1);
 284         }
 285         if (dtb_filename) {
 286             bp_size += get_tag_size(sizeof(uint32_t));
 287         }
 288         if (initrd_filename) {
 289             bp_size += get_tag_size(sizeof(BpMemInfo));
 290         }
 291
 292         /* Put kernel bootparameters to the end of that SRAM */
 293         tagptr = (tagptr - bp_size) & ~0xff;
 294         cur_tagptr = put_tag(tagptr, BP_TAG_FIRST, 0, NULL);
 295         cur_tagptr = put_tag(cur_tagptr, BP_TAG_MEMORY,
 296                              sizeof(memory_location), &memory_location);
 297
 298         if (kernel_cmdline) {
 299             cur_tagptr = put_tag(cur_tagptr, BP_TAG_COMMAND_LINE,
 300                                  strlen(kernel_cmdline) + 1, kernel_cmdline);
 301         }
 302         if (dtb_filename) {
 303             int fdt_size;
 304             void *fdt = load_device_tree(dtb_filename, &fdt_size);
 305             uint32_t dtb_addr = tswap32(cur_lowmem);
 306
 307             if (!fdt) {
 308                 error_report("could not load DTB '%s'", dtb_filename);
 309                 exit(EXIT_FAILURE);
 310             }
 311
 312             cpu_physical_memory_write(cur_lowmem, fdt, fdt_size);
 313             cur_tagptr = put_tag(cur_tagptr, BP_TAG_FDT,
 314                                  sizeof(dtb_addr), &dtb_addr);
 315             cur_lowmem = QEMU_ALIGN_UP(cur_lowmem + fdt_size, 4096);
 316         }
 317         if (initrd_filename) {
 318             BpMemInfo initrd_location = { 0 };
 319             int initrd_size = load_ramdisk(initrd_filename, cur_lowmem,
 320                                            lowmem_end - cur_lowmem);
 321
 322             if (initrd_size < 0) {
 323                 initrd_size = load_image_targphys(initrd_filename,
 324                                                   cur_lowmem,
 325                                                   lowmem_end - cur_lowmem);
 326             }
 327             if (initrd_size < 0) {
 328                 error_report("could not load initrd '%s'", initrd_filename);
 329                 exit(EXIT_FAILURE);
 330             }
 331             initrd_location.start = tswap32(cur_lowmem);
 332             initrd_location.end = tswap32(cur_lowmem + initrd_size);
 333             cur_tagptr = put_tag(cur_tagptr, BP_TAG_INITRD,
 334                                  sizeof(initrd_location), &initrd_location);
 335             cur_lowmem = QEMU_ALIGN_UP(cur_lowmem + initrd_size, 4096);
 336         }
 337         cur_tagptr = put_tag(cur_tagptr, BP_TAG_LAST, 0, NULL);
 338         env->regs[2] = tagptr;
 339
 340         uint64_t elf_entry;
 341         uint64_t elf_lowaddr;
 342         int success = load_elf(kernel_filename, translate_phys_addr, cpu,
 343                 &elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0);
 344         if (success > 0) {
 345             entry_point = elf_entry;
 346         } else {
 347             hwaddr ep;
 348             int is_linux;
 349             success = load_uimage(kernel_filename, &ep, NULL, &is_linux,
 350                                   translate_phys_addr, cpu);
 351             if (success > 0 && is_linux) {
 352                 entry_point = ep;
 353             } else {
 354                 error_report("could not load kernel '%s'",
 355                              kernel_filename);
 356                 exit(EXIT_FAILURE);
 357             }
 358         }
 359         if (entry_point != env->pc) {
 360             static const uint8_t jx_a0[] = {
 361 #ifdef TARGET_WORDS_BIGENDIAN
 362                 0x0a, 0, 0,
 363 #else
 364                 0xa0, 0, 0,
 365 #endif
 366             };
 367             env->regs[0] = entry_point;
 368             cpu_physical_memory_write(env->pc, jx_a0, sizeof(jx_a0));
 369         }
 370     } else {
 371         if (flash) {
 372             MemoryRegion *flash_mr = pflash_cfi01_get_memory(flash);
 373             MemoryRegion *flash_io = g_malloc(sizeof(*flash_io));
 374
 375             memory_region_init_alias(flash_io, NULL, "lx60.flash",
 376                     flash_mr, board->flash_boot_base,
 377                     board->flash_size - board->flash_boot_base < 0x02000000 ?
 378                     board->flash_size - board->flash_boot_base : 0x02000000);
 379             memory_region_add_subregion(system_memory, 0xfe000000,
 380                     flash_io);
 381         }
 382     }
 383 }
 384
 385 static void xtensa_lx60_init(MachineState *machine)
 386 {
 387     static const LxBoardDesc lx60_board = {
 388         .flash_base = 0xf8000000,
 389         .flash_size = 0x00400000,
 390         .flash_sector_size = 0x10000,
 391         .sram_size = 0x20000,
 392     };
 393     lx_init(&lx60_board, machine);
 394 }
 395
 396 static void xtensa_lx200_init(MachineState *machine)
 397 {
 398     static const LxBoardDesc lx200_board = {
 399         .flash_base = 0xf8000000,
 400         .flash_size = 0x01000000,
 401         .flash_sector_size = 0x20000,
 402         .sram_size = 0x2000000,
 403     };
 404     lx_init(&lx200_board, machine);
 405 }
 406
 407 static void xtensa_ml605_init(MachineState *machine)
 408 {
 409     static const LxBoardDesc ml605_board = {
 410         .flash_base = 0xf8000000,
 411         .flash_size = 0x01000000,
 412         .flash_sector_size = 0x20000,
 413         .sram_size = 0x2000000,
 414     };
 415     lx_init(&ml605_board, machine);
 416 }
 417
 418 static void xtensa_kc705_init(MachineState *machine)
 419 {
 420     static const LxBoardDesc kc705_board = {
 421         .flash_base = 0xf0000000,
 422         .flash_size = 0x08000000,
 423         .flash_boot_base = 0x06000000,
 424         .flash_sector_size = 0x20000,
 425         .sram_size = 0x2000000,
 426     };
 427     lx_init(&kc705_board, machine);
 428 }
 429
 430 static QEMUMachine xtensa_lx60_machine = {
 431     .name = "lx60",
 432     .desc = "lx60 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 433     .init = xtensa_lx60_init,
 434     .max_cpus = 4,
 435 };
 436
 437 static QEMUMachine xtensa_lx200_machine = {
 438     .name = "lx200",
 439     .desc = "lx200 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 440     .init = xtensa_lx200_init,
 441     .max_cpus = 4,
 442 };
 443
 444 static QEMUMachine xtensa_ml605_machine = {
 445     .name = "ml605",
 446     .desc = "ml605 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 447     .init = xtensa_ml605_init,
 448     .max_cpus = 4,
 449 };
 450
 451 static QEMUMachine xtensa_kc705_machine = {
 452     .name = "kc705",
 453     .desc = "kc705 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 454     .init = xtensa_kc705_init,
 455     .max_cpus = 4,
 456 };
 457
 458 static void xtensa_lx_machines_init(void)
 459 {
 460     qemu_register_machine(&xtensa_lx60_machine);
 461     qemu_register_machine(&xtensa_lx200_machine);
 462     qemu_register_machine(&xtensa_ml605_machine);
 463     qemu_register_machine(&xtensa_kc705_machine);
 464 }
 465
 466 machine_init(xtensa_lx_machines_init);