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 "pc.h"
  35 #include "sysbus.h"
  36 #include "flash.h"
  37
  38 typedef struct LxBoardDesc {
  39     size_t flash_size;
  40     size_t flash_sector_size;
  41     size_t sram_size;
  42 } LxBoardDesc;
  43
  44 typedef struct Lx60FpgaState {
  45     MemoryRegion iomem;
  46     uint32_t leds;
  47     uint32_t switches;
  48 } Lx60FpgaState;
  49
  50 static void lx60_fpga_reset(void *opaque)
  51 {
  52     Lx60FpgaState *s = opaque;
  53
  54     s->leds = 0;
  55     s->switches = 0;
  56 }
  57
  58 static uint64_t lx60_fpga_read(void *opaque, target_phys_addr_t addr,
  59         unsigned size)
  60 {
  61     Lx60FpgaState *s = opaque;
  62
  63     switch (addr) {
  64     case 0x0: /*build date code*/
  65         return 0x27092011;
  66
  67     case 0x4: /*processor clock frequency, Hz*/
  68         return 10000000;
  69
  70     case 0x8: /*LEDs (off = 0, on = 1)*/
  71         return s->leds;
  72
  73     case 0xc: /*DIP switches (off = 0, on = 1)*/
  74         return s->switches;
  75     }
  76     return 0;
  77 }
  78
  79 static void lx60_fpga_write(void *opaque, target_phys_addr_t addr,
  80         uint64_t val, unsigned size)
  81 {
  82     Lx60FpgaState *s = opaque;
  83
  84     switch (addr) {
  85     case 0x8: /*LEDs (off = 0, on = 1)*/
  86         s->leds = val;
  87         break;
  88
  89     case 0x10: /*board reset*/
  90         if (val == 0xdead) {
  91             qemu_system_reset_request();
  92         }
  93         break;
  94     }
  95 }
  96
  97 static const MemoryRegionOps lx60_fpga_ops = {
  98     .read = lx60_fpga_read,
  99     .write = lx60_fpga_write,
 100     .endianness = DEVICE_NATIVE_ENDIAN,
 101 };
 102
 103 static Lx60FpgaState *lx60_fpga_init(MemoryRegion *address_space,
 104         target_phys_addr_t base)
 105 {
 106     Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));
 107
 108     memory_region_init_io(&s->iomem, &lx60_fpga_ops, s,
 109             "lx60-fpga", 0x10000);
 110     memory_region_add_subregion(address_space, base, &s->iomem);
 111     lx60_fpga_reset(s);
 112     qemu_register_reset(lx60_fpga_reset, s);
 113     return s;
 114 }
 115
 116 static void lx60_net_init(MemoryRegion *address_space,
 117         target_phys_addr_t base,
 118         target_phys_addr_t descriptors,
 119         target_phys_addr_t buffers,
 120         qemu_irq irq, NICInfo *nd)
 121 {
 122     DeviceState *dev;
 123     SysBusDevice *s;
 124     MemoryRegion *ram;
 125
 126     dev = qdev_create(NULL, "open_eth");
 127     qdev_set_nic_properties(dev, nd);
 128     qdev_init_nofail(dev);
 129
 130     s = sysbus_from_qdev(dev);
 131     sysbus_connect_irq(s, 0, irq);
 132     memory_region_add_subregion(address_space, base,
 133             sysbus_mmio_get_region(s, 0));
 134     memory_region_add_subregion(address_space, descriptors,
 135             sysbus_mmio_get_region(s, 1));
 136
 137     ram = g_malloc(sizeof(*ram));
 138     memory_region_init_ram(ram, NULL, "open_eth.ram", 16384);
 139     memory_region_add_subregion(address_space, buffers, ram);
 140 }
 141
 142 static uint64_t translate_phys_addr(void *env, uint64_t addr)
 143 {
 144     return cpu_get_phys_page_debug(env, addr);
 145 }
 146
 147 static void lx60_reset(void *env)
 148 {
 149     cpu_reset(env);
 150 }
 151
 152 static void lx_init(const LxBoardDesc *board,
 153         ram_addr_t ram_size, const char *boot_device,
 154         const char *kernel_filename, const char *kernel_cmdline,
 155         const char *initrd_filename, const char *cpu_model)
 156 {
 157 #ifdef TARGET_WORDS_BIGENDIAN
 158     int be = 1;
 159 #else
 160     int be = 0;
 161 #endif
 162     MemoryRegion *system_memory = get_system_memory();
 163     CPUState *env = NULL;
 164     MemoryRegion *ram, *rom, *system_io;
 165     DriveInfo *dinfo;
 166     pflash_t *flash = NULL;
 167     int n;
 168
 169     if (!cpu_model) {
 170         cpu_model = "dc232b";
 171     }
 172
 173     for (n = 0; n < smp_cpus; n++) {
 174         env = cpu_init(cpu_model);
 175         if (!env) {
 176             fprintf(stderr, "Unable to find CPU definition\n");
 177             exit(1);
 178         }
 179         env->sregs[PRID] = n;
 180         qemu_register_reset(lx60_reset, env);
 181         /* Need MMU initialized prior to ELF loading,
 182          * so that ELF gets loaded into virtual addresses
 183          */
 184         cpu_reset(env);
 185     }
 186
 187     ram = g_malloc(sizeof(*ram));
 188     memory_region_init_ram(ram, NULL, "xtensa.sram", ram_size);
 189     memory_region_add_subregion(system_memory, 0, ram);
 190
 191     rom = g_malloc(sizeof(*rom));
 192     memory_region_init_ram(rom, NULL, "xtensa.rom", 0x1000);
 193     memory_region_add_subregion(system_memory, 0xfe000000, rom);
 194
 195     system_io = g_malloc(sizeof(*system_io));
 196     memory_region_init(system_io, "system.io", 224 * 1024 * 1024);
 197     memory_region_add_subregion(system_memory, 0xf0000000, system_io);
 198     lx60_fpga_init(system_io, 0x0d020000);
 199     if (nd_table[0].vlan) {
 200         lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,
 201                 xtensa_get_extint(env, 1), nd_table);
 202     }
 203
 204     if (!serial_hds[0]) {
 205         serial_hds[0] = qemu_chr_new("serial0", "null", NULL);
 206     }
 207
 208     serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0),
 209             115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
 210
 211     dinfo = drive_get(IF_PFLASH, 0, 0);
 212     if (dinfo) {
 213         flash = pflash_cfi01_register(0xf8000000,
 214                 NULL, "lx60.io.flash", board->flash_size,
 215                 dinfo->bdrv, board->flash_sector_size,
 216                 board->flash_size / board->flash_sector_size,
 217                 4, 0x0000, 0x0000, 0x0000, 0x0000, be);
 218         if (flash == NULL) {
 219             fprintf(stderr, "Unable to mount pflash\n");
 220             exit(1);
 221         }
 222     }
 223
 224     /* Use presence of kernel file name as 'boot from SRAM' switch. */
 225     if (kernel_filename) {
 226         uint64_t elf_entry;
 227         uint64_t elf_lowaddr;
 228         int success = load_elf(kernel_filename, translate_phys_addr, env,
 229                 &elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0);
 230         if (success > 0) {
 231             env->pc = elf_entry;
 232         }
 233     } else {
 234         if (flash) {
 235             MemoryRegion *flash_mr = pflash_cfi01_get_memory(flash);
 236             MemoryRegion *flash_io = g_malloc(sizeof(*flash_io));
 237
 238             memory_region_init_alias(flash_io, "lx60.flash",
 239                     flash_mr, 0, board->flash_size);
 240             memory_region_add_subregion(system_memory, 0xfe000000,
 241                     flash_io);
 242         }
 243     }
 244 }
 245
 246 static void xtensa_lx60_init(ram_addr_t ram_size,
 247                      const char *boot_device,
 248                      const char *kernel_filename, const char *kernel_cmdline,
 249                      const char *initrd_filename, const char *cpu_model)
 250 {
 251     static const LxBoardDesc lx60_board = {
 252         .flash_size = 0x400000,
 253         .flash_sector_size = 0x10000,
 254         .sram_size = 0x20000,
 255     };
 256     lx_init(&lx60_board, ram_size, boot_device,
 257             kernel_filename, kernel_cmdline,
 258             initrd_filename, cpu_model);
 259 }
 260
 261 static void xtensa_lx200_init(ram_addr_t ram_size,
 262                      const char *boot_device,
 263                      const char *kernel_filename, const char *kernel_cmdline,
 264                      const char *initrd_filename, const char *cpu_model)
 265 {
 266     static const LxBoardDesc lx200_board = {
 267         .flash_size = 0x1000000,
 268         .flash_sector_size = 0x20000,
 269         .sram_size = 0x2000000,
 270     };
 271     lx_init(&lx200_board, ram_size, boot_device,
 272             kernel_filename, kernel_cmdline,
 273             initrd_filename, cpu_model);
 274 }
 275
 276 static QEMUMachine xtensa_lx60_machine = {
 277     .name = "lx60",
 278     .desc = "lx60 EVB (dc232b)",
 279     .init = xtensa_lx60_init,
 280     .max_cpus = 4,
 281 };
 282
 283 static QEMUMachine xtensa_lx200_machine = {
 284     .name = "lx200",
 285     .desc = "lx200 EVB (dc232b)",
 286     .init = xtensa_lx200_init,
 287     .max_cpus = 4,
 288 };
 289
 290 static void xtensa_lx_machines_init(void)
 291 {
 292     qemu_register_machine(&xtensa_lx60_machine);
 293     qemu_register_machine(&xtensa_lx200_machine);
 294 }
 295
 296 machine_init(xtensa_lx_machines_init);