hw/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.h"
  29 #include "boards.h"
  30 #include "loader.h"
  31 #include "elf.h"
  32 #include "memory.h"
  33 #include "exec-memory.h"
  34 #include "serial.h"
  35 #include "net.h"
  36 #include "sysbus.h"
  37 #include "flash.h"
  38 #include "blockdev.h"
  39 #include "xtensa_bootparam.h"
  40
  41 typedef struct LxBoardDesc {
  42     size_t flash_size;
  43     size_t flash_sector_size;
  44     size_t sram_size;
  45 } LxBoardDesc;
  46
  47 typedef struct Lx60FpgaState {
  48     MemoryRegion iomem;
  49     uint32_t leds;
  50     uint32_t switches;
  51 } Lx60FpgaState;
  52
  53 static void lx60_fpga_reset(void *opaque)
  54 {
  55     Lx60FpgaState *s = opaque;
  56
  57     s->leds = 0;
  58     s->switches = 0;
  59 }
  60
  61 static uint64_t lx60_fpga_read(void *opaque, hwaddr addr,
  62         unsigned size)
  63 {
  64     Lx60FpgaState *s = opaque;
  65
  66     switch (addr) {
  67     case 0x0: /*build date code*/
  68         return 0x09272011;
  69
  70     case 0x4: /*processor clock frequency, Hz*/
  71         return 10000000;
  72
  73     case 0x8: /*LEDs (off = 0, on = 1)*/
  74         return s->leds;
  75
  76     case 0xc: /*DIP switches (off = 0, on = 1)*/
  77         return s->switches;
  78     }
  79     return 0;
  80 }
  81
  82 static void lx60_fpga_write(void *opaque, hwaddr addr,
  83         uint64_t val, unsigned size)
  84 {
  85     Lx60FpgaState *s = opaque;
  86
  87     switch (addr) {
  88     case 0x8: /*LEDs (off = 0, on = 1)*/
  89         s->leds = val;
  90         break;
  91
  92     case 0x10: /*board reset*/
  93         if (val == 0xdead) {
  94             qemu_system_reset_request();
  95         }
  96         break;
  97     }
  98 }
  99
 100 static const MemoryRegionOps lx60_fpga_ops = {
 101     .read = lx60_fpga_read,
 102     .write = lx60_fpga_write,
 103     .endianness = DEVICE_NATIVE_ENDIAN,
 104 };
 105
 106 static Lx60FpgaState *lx60_fpga_init(MemoryRegion *address_space,
 107         hwaddr base)
 108 {
 109     Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));
 110
 111     memory_region_init_io(&s->iomem, &lx60_fpga_ops, s,
 112             "lx60.fpga", 0x10000);
 113     memory_region_add_subregion(address_space, base, &s->iomem);
 114     lx60_fpga_reset(s);
 115     qemu_register_reset(lx60_fpga_reset, s);
 116     return s;
 117 }
 118
 119 static void lx60_net_init(MemoryRegion *address_space,
 120         hwaddr base,
 121         hwaddr descriptors,
 122         hwaddr buffers,
 123         qemu_irq irq, NICInfo *nd)
 124 {
 125     DeviceState *dev;
 126     SysBusDevice *s;
 127     MemoryRegion *ram;
 128
 129     dev = qdev_create(NULL, "open_eth");
 130     qdev_set_nic_properties(dev, nd);
 131     qdev_init_nofail(dev);
 132
 133     s = sysbus_from_qdev(dev);
 134     sysbus_connect_irq(s, 0, irq);
 135     memory_region_add_subregion(address_space, base,
 136             sysbus_mmio_get_region(s, 0));
 137     memory_region_add_subregion(address_space, descriptors,
 138             sysbus_mmio_get_region(s, 1));
 139
 140     ram = g_malloc(sizeof(*ram));
 141     memory_region_init_ram(ram, "open_eth.ram", 16384);
 142     vmstate_register_ram_global(ram);
 143     memory_region_add_subregion(address_space, buffers, ram);
 144 }
 145
 146 static uint64_t translate_phys_addr(void *env, uint64_t addr)
 147 {
 148     return cpu_get_phys_page_debug(env, addr);
 149 }
 150
 151 static void lx60_reset(void *opaque)
 152 {
 153     XtensaCPU *cpu = opaque;
 154
 155     cpu_reset(CPU(cpu));
 156 }
 157
 158 static void lx_init(const LxBoardDesc *board, QEMUMachineInitArgs *args)
 159 {
 160 #ifdef TARGET_WORDS_BIGENDIAN
 161     int be = 1;
 162 #else
 163     int be = 0;
 164 #endif
 165     MemoryRegion *system_memory = get_system_memory();
 166     XtensaCPU *cpu = NULL;
 167     CPUXtensaState *env = NULL;
 168     MemoryRegion *ram, *rom, *system_io;
 169     DriveInfo *dinfo;
 170     pflash_t *flash = NULL;
 171     const char *cpu_model = args->cpu_model;
 172     const char *kernel_filename = args->kernel_filename;
 173     const char *kernel_cmdline = args->kernel_cmdline;
 174     int n;
 175
 176     if (!cpu_model) {
 177         cpu_model = XTENSA_DEFAULT_CPU_MODEL;
 178     }
 179
 180     for (n = 0; n < smp_cpus; n++) {
 181         cpu = cpu_xtensa_init(cpu_model);
 182         if (cpu == NULL) {
 183             fprintf(stderr, "Unable to find CPU definition\n");
 184             exit(1);
 185         }
 186         env = &cpu->env;
 187
 188         env->sregs[PRID] = n;
 189         qemu_register_reset(lx60_reset, cpu);
 190         /* Need MMU initialized prior to ELF loading,
 191          * so that ELF gets loaded into virtual addresses
 192          */
 193         cpu_reset(CPU(cpu));
 194     }
 195
 196     ram = g_malloc(sizeof(*ram));
 197     memory_region_init_ram(ram, "lx60.dram", args->ram_size);
 198     vmstate_register_ram_global(ram);
 199     memory_region_add_subregion(system_memory, 0, ram);
 200
 201     system_io = g_malloc(sizeof(*system_io));
 202     memory_region_init(system_io, "lx60.io", 224 * 1024 * 1024);
 203     memory_region_add_subregion(system_memory, 0xf0000000, system_io);
 204     lx60_fpga_init(system_io, 0x0d020000);
 205     if (nd_table[0].used) {
 206         lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,
 207                 xtensa_get_extint(env, 1), nd_table);
 208     }
 209
 210     if (!serial_hds[0]) {
 211         serial_hds[0] = qemu_chr_new("serial0", "null", NULL);
 212     }
 213
 214     serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0),
 215             115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
 216
 217     dinfo = drive_get(IF_PFLASH, 0, 0);
 218     if (dinfo) {
 219         flash = pflash_cfi01_register(0xf8000000,
 220                 NULL, "lx60.io.flash", board->flash_size,
 221                 dinfo->bdrv, board->flash_sector_size,
 222                 board->flash_size / board->flash_sector_size,
 223                 4, 0x0000, 0x0000, 0x0000, 0x0000, be);
 224         if (flash == NULL) {
 225             fprintf(stderr, "Unable to mount pflash\n");
 226             exit(1);
 227         }
 228     }
 229
 230     /* Use presence of kernel file name as 'boot from SRAM' switch. */
 231     if (kernel_filename) {
 232         rom = g_malloc(sizeof(*rom));
 233         memory_region_init_ram(rom, "lx60.sram", board->sram_size);
 234         vmstate_register_ram_global(rom);
 235         memory_region_add_subregion(system_memory, 0xfe000000, rom);
 236
 237         /* Put kernel bootparameters to the end of that SRAM */
 238         if (kernel_cmdline) {
 239             size_t cmdline_size = strlen(kernel_cmdline) + 1;
 240             size_t bp_size = sizeof(BpTag[4]) + cmdline_size;
 241             uint32_t tagptr = (0xfe000000 + board->sram_size - bp_size) & ~0xff;
 242
 243             env->regs[2] = tagptr;
 244
 245             tagptr = put_tag(tagptr, 0x7b0b, 0, NULL);
 246             if (cmdline_size > 1) {
 247                 tagptr = put_tag(tagptr, 0x1001,
 248                         cmdline_size, kernel_cmdline);
 249             }
 250             tagptr = put_tag(tagptr, 0x7e0b, 0, NULL);
 251         }
 252         uint64_t elf_entry;
 253         uint64_t elf_lowaddr;
 254         int success = load_elf(kernel_filename, translate_phys_addr, env,
 255                 &elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0);
 256         if (success > 0) {
 257             env->pc = elf_entry;
 258         }
 259     } else {
 260         if (flash) {
 261             MemoryRegion *flash_mr = pflash_cfi01_get_memory(flash);
 262             MemoryRegion *flash_io = g_malloc(sizeof(*flash_io));
 263
 264             memory_region_init_alias(flash_io, "lx60.flash",
 265                     flash_mr, 0, board->flash_size);
 266             memory_region_add_subregion(system_memory, 0xfe000000,
 267                     flash_io);
 268         }
 269     }
 270 }
 271
 272 static void xtensa_lx60_init(QEMUMachineInitArgs *args)
 273 {
 274     static const LxBoardDesc lx60_board = {
 275         .flash_size = 0x400000,
 276         .flash_sector_size = 0x10000,
 277         .sram_size = 0x20000,
 278     };
 279     lx_init(&lx60_board, args);
 280 }
 281
 282 static void xtensa_lx200_init(QEMUMachineInitArgs *args)
 283 {
 284     static const LxBoardDesc lx200_board = {
 285         .flash_size = 0x1000000,
 286         .flash_sector_size = 0x20000,
 287         .sram_size = 0x2000000,
 288     };
 289     lx_init(&lx200_board, args);
 290 }
 291
 292 static QEMUMachine xtensa_lx60_machine = {
 293     .name = "lx60",
 294     .desc = "lx60 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 295     .init = xtensa_lx60_init,
 296     .max_cpus = 4,
 297 };
 298
 299 static QEMUMachine xtensa_lx200_machine = {
 300     .name = "lx200",
 301     .desc = "lx200 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
 302     .init = xtensa_lx200_init,
 303     .max_cpus = 4,
 304 };
 305
 306 static void xtensa_lx_machines_init(void)
 307 {
 308     qemu_register_machine(&xtensa_lx60_machine);
 309     qemu_register_machine(&xtensa_lx200_machine);
 310 }
 311
 312 machine_init(xtensa_lx_machines_init);