hw/xtensa/xtensa_lx60.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/blockdev.h"
  39 #include "sysemu/char.h"
  40 #include "xtensa_bootparam.h"
  41
  42 typedef struct LxBoardDesc {
  43     hwaddr flash_base;
  44     size_t flash_size;
  45     size_t flash_sector_size;
  46     size_t sram_size;
  47 } LxBoardDesc;
  48
  49 typedef struct Lx60FpgaState {
  50     MemoryRegion iomem;
  51     uint32_t leds;
  52     uint32_t switches;
  53 } Lx60FpgaState;
  54
  55 static void lx60_fpga_reset(void *opaque)
  56 {
  57     Lx60FpgaState *s = opaque;
  58
  59     s->leds = 0;
  60     s->switches = 0;
  61 }
  62
  63 static uint64_t lx60_fpga_read(void *opaque, hwaddr addr,
  64         unsigned size)
  65 {
  66     Lx60FpgaState *s = opaque;
  67
  68     switch (addr) {
  69     case 0x0: /*build date code*/
  70         return 0x09272011;
  71
  72     case 0x4: /*processor clock frequency, Hz*/
  73         return 10000000;
  74
  75     case 0x8: /*LEDs (off = 0, on = 1)*/
  76         return s->leds;
  77
  78     case 0xc: /*DIP switches (off = 0, on = 1)*/
  79         return s->switches;
  80     }
  81     return 0;
  82 }
  83
  84 static void lx60_fpga_write(void *opaque, hwaddr addr,
  85         uint64_t val, unsigned size)
  86 {
  87     Lx60FpgaState *s = opaque;
  88
  89     switch (addr) {
  90     case 0x8: /*LEDs (off = 0, on = 1)*/
  91         s->leds = val;
  92         break;
  93
  94     case 0x10: /*board reset*/
  95         if (val == 0xdead) {
  96             qemu_system_reset_request();
  97         }
  98         break;
  99     }
 100 }
 101
 102 static const MemoryRegionOps lx60_fpga_ops = {
 103     .read = lx60_fpga_read,
 104     .write = lx60_fpga_write,
 105     .endianness = DEVICE_NATIVE_ENDIAN,
 106 };
 107
 108 static Lx60FpgaState *lx60_fpga_init(MemoryRegion *address_space,
 109         hwaddr base)
 110 {
 111     Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));
 112
 113     memory_region_init_io(&s->iomem, NULL, &lx60_fpga_ops, s,
 114             "lx60.fpga", 0x10000);
 115     memory_region_add_subregion(address_space, base, &s->iomem);
 116     lx60_fpga_reset(s);
 117     qemu_register_reset(lx60_fpga_reset, s);
 118     return s;
 119 }
 120
 121 static void lx60_net_init(MemoryRegion *address_space,
 122         hwaddr base,
 123         hwaddr descriptors,
 124         hwaddr buffers,
 125         qemu_irq irq, NICInfo *nd)
 126 {
 127     DeviceState *dev;
 128     SysBusDevice *s;
 129     MemoryRegion *ram;
 130
 131     dev = qdev_create(NULL, "open_eth");
 132     qdev_set_nic_properties(dev, nd);
 133     qdev_init_nofail(dev);
 134
 135     s = SYS_BUS_DEVICE(dev);
 136     sysbus_connect_irq(s, 0, irq);
 137     memory_region_add_subregion(address_space, base,
 138             sysbus_mmio_get_region(s, 0));
 139     memory_region_add_subregion(address_space, descriptors,
 140             sysbus_mmio_get_region(s, 1));
 141
 142     ram = g_malloc(sizeof(*ram));
 143     memory_region_init_ram(ram, OBJECT(s), "open_eth.ram", 16384);
 144     vmstate_register_ram_global(ram);
 145     memory_region_add_subregion(address_space, buffers, ram);
 146 }
 147
 148 static uint64_t translate_phys_addr(void *opaque, uint64_t addr)
 149 {
 150     XtensaCPU *cpu = opaque;
 151
 152     return cpu_get_phys_page_debug(CPU(cpu), addr);
 153 }
 154
 155 static void lx60_reset(void *opaque)
 156 {
 157     XtensaCPU *cpu = opaque;
 158
 159     cpu_reset(CPU(cpu));
 160 }
 161
 162 static void lx_init(const LxBoardDesc *board, MachineState *machine)
 163 {
 164 #ifdef TARGET_WORDS_BIGENDIAN
 165     int be = 1;
 166 #else
 167     int be = 0;
 168 #endif
 169     MemoryRegion *system_memory = get_system_memory();
 170     XtensaCPU *cpu = NULL;
 171     CPUXtensaState *env = NULL;
 172     MemoryRegion *ram, *rom, *system_io;
 173     DriveInfo *dinfo;
 174     pflash_t *flash = NULL;
 175     const char *cpu_model = machine->cpu_model;
 176     const char *kernel_filename = machine->kernel_filename;
 177     const char *kernel_cmdline = machine->kernel_cmdline;
 178     int n;
 179
 180     if (!cpu_model) {
 181         cpu_model = XTENSA_DEFAULT_CPU_MODEL;
 182     }
 183
 184     for (n = 0; n < smp_cpus; n++) {
 185         cpu = cpu_xtensa_init(cpu_model);
 186         if (cpu == NULL) {
 187             fprintf(stderr, "Unable to find CPU definition\n");
 188             exit(1);
 189         }
 190         env = &cpu->env;
 191
 192         env->sregs[PRID] = n;
 193         qemu_register_reset(lx60_reset, cpu);
 194         /* Need MMU initialized prior to ELF loading,
 195          * so that ELF gets loaded into virtual addresses
 196          */
 197         cpu_reset(CPU(cpu));
 198     }
 199
 200     ram = g_malloc(sizeof(*ram));
 201     memory_region_init_ram(ram, NULL, "lx60.dram", machine->ram_size);
 202     vmstate_register_ram_global(ram);
 203     memory_region_add_subregion(system_memory, 0, ram);
 204
 205     system_io = g_malloc(sizeof(*system_io));
 206     memory_region_init(system_io, NULL, "lx60.io", 224 * 1024 * 1024);
 207     memory_region_add_subregion(system_memory, 0xf0000000, system_io);
 208     lx60_fpga_init(system_io, 0x0d020000);
 209     if (nd_table[0].used) {
 210         lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,
 211                 xtensa_get_extint(env, 1), nd_table);
 212     }
 213
 214     if (!serial_hds[0]) {
 215         serial_hds[0] = qemu_chr_new("serial0", "null", NULL);
 216     }
 217
 218     serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0),
 219             115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
 220
 221     dinfo = drive_get(IF_PFLASH, 0, 0);
 222     if (dinfo) {
 223         flash = pflash_cfi01_register(board->flash_base,
 224                 NULL, "lx60.io.flash", board->flash_size,
 225                 dinfo->bdrv, board->flash_sector_size,
 226                 board->flash_size / board->flash_sector_size,
 227                 4, 0x0000, 0x0000, 0x0000, 0x0000, be);
 228         if (flash == NULL) {
 229             fprintf(stderr, "Unable to mount pflash\n");
 230             exit(1);
 231         }
 232     }
 233
 234     /* Use presence of kernel file name as 'boot from SRAM' switch. */
 235     if (kernel_filename) {
 236         rom = g_malloc(sizeof(*rom));
 237         memory_region_init_ram(rom, NULL, "lx60.sram", board->sram_size);
 238         vmstate_register_ram_global(rom);
 239         memory_region_add_subregion(system_memory, 0xfe000000, rom);
 240
 241         /* Put kernel bootparameters to the end of that SRAM */
 242         if (kernel_cmdline) {
 243             size_t cmdline_size = strlen(kernel_cmdline) + 1;
 244             size_t bp_size = sizeof(BpTag[4]) + cmdline_size;
 245             uint32_t tagptr = (0xfe000000 + board->sram_size - bp_size) & ~0xff;
 246
 247             env->regs[2] = tagptr;
 248
 249             tagptr = put_tag(tagptr, 0x7b0b, 0, NULL);
 250             if (cmdline_size > 1) {
 251                 tagptr = put_tag(tagptr, 0x1001,
 252                         cmdline_size, kernel_cmdline);
 253             }
 254             tagptr = put_tag(tagptr, 0x7e0b, 0, NULL);
 255         }
 256         uint64_t elf_entry;
 257         uint64_t elf_lowaddr;
 258         int success = load_elf(kernel_filename, translate_phys_addr, cpu,
 259                 &elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0);
 260         if (success > 0) {
 261             env->pc = elf_entry;
 262         }
 263     } else {
 264         if (flash) {
 265             MemoryRegion *flash_mr = pflash_cfi01_get_memory(flash);
 266             MemoryRegion *flash_io = g_malloc(sizeof(*flash_io));
 267
 268             memory_region_init_alias(flash_io, NULL, "lx60.flash",
 269                     flash_mr, 0,
 270                     board->flash_size < 0x02000000 ?
 271                     board->flash_size : 0x02000000);
 272             memory_region_add_subregion(system_memory, 0xfe000000,
 273                     flash_io);
 274         }
 275     }
 276 }
 277
 278 static void xtensa_lx60_init(MachineState *machine)
 279 {
 280     static const LxBoardDesc lx60_board = {
 281         .flash_base = 0xf8000000,
 282         .flash_size = 0x00400000,
 283         .flash_sector_size = 0x10000,
 284         .sram_size = 0x20000,
 285     };
 286     lx_init(&lx60_board, machine);
 287 }
 288
 289 static void xtensa_lx200_init(MachineState *machine)
 290 {
 291     static const LxBoardDesc lx200_board = {
 292         .flash_base = 0xf8000000,
 293         .flash_size = 0x01000000,
 294         .flash_sector_size = 0x20000,
 295         .sram_size = 0x2000000,
 296     };
 297     lx_init(&lx200_board, machine);
 298 }
 299
 300 static void xtensa_ml605_init(MachineState *machine)
 301 {
 302     static const LxBoardDesc ml605_board = {
 303         .flash_base = 0xf8000000,
 304         .flash_size = 0x02000000,
 305         .flash_sector_size = 0x20000,
 306         .sram_size = 0x2000000,
 307     };
 308     lx_init(&ml605_board, machine);
 309 }
 310
 311 static void xtensa_kc705_init(MachineState *machine)
 312 {
 313     static const LxBoardDesc kc705_board = {
 314         .flash_base = 0xf0000000,
 315         .flash_size = 0x08000000,
 316         .flash_sector_size = 0x20000,
 317         .sram_size = 0x2000000,
 318     };
 319     lx_init(&kc705_board, machine);
 320 }
 321
 322 static QEMUMachine xtensa_lx60_machine = {
 323     .name = "lx60",
 324     .desc = "lx60 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 325     .init = xtensa_lx60_init,
 326     .max_cpus = 4,
 327 };
 328
 329 static QEMUMachine xtensa_lx200_machine = {
 330     .name = "lx200",
 331     .desc = "lx200 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 332     .init = xtensa_lx200_init,
 333     .max_cpus = 4,
 334 };
 335
 336 static QEMUMachine xtensa_ml605_machine = {
 337     .name = "ml605",
 338     .desc = "ml605 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 339     .init = xtensa_ml605_init,
 340     .max_cpus = 4,
 341 };
 342
 343 static QEMUMachine xtensa_kc705_machine = {
 344     .name = "kc705",
 345     .desc = "kc705 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 346     .init = xtensa_kc705_init,
 347     .max_cpus = 4,
 348 };
 349
 350 static void xtensa_lx_machines_init(void)
 351 {
 352     qemu_register_machine(&xtensa_lx60_machine);
 353     qemu_register_machine(&xtensa_lx200_machine);
 354     qemu_register_machine(&xtensa_ml605_machine);
 355     qemu_register_machine(&xtensa_kc705_machine);
 356 }
 357
 358 machine_init(xtensa_lx_machines_init);