Archipelago » qemu

/*

 * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *     * Redistributions of source code must retain the above copyright

 *       notice, this list of conditions and the following disclaimer.

 *     * Redistributions in binary form must reproduce the above copyright

 *       notice, this list of conditions and the following disclaimer in the

 *       documentation and/or other materials provided with the distribution.

 *     * Neither the name of the Open Source and Linux Lab nor the

 *       names of its contributors may be used to endorse or promote products

 *       derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "sysemu/sysemu.h"

#include "boards.h"

#include "loader.h"

#include "elf.h"

#include "exec/memory.h"

#include "exec/address-spaces.h"

#include "serial.h"

#include "net/net.h"

#include "sysbus.h"

#include "flash.h"

#include "sysemu/blockdev.h"

#include "char/char.h"

#include "xtensa_bootparam.h"

typedef struct LxBoardDesc {

    size_t flash_size;

    size_t flash_sector_size;

    size_t sram_size;

} LxBoardDesc;

typedef struct Lx60FpgaState {

    MemoryRegion iomem;

    uint32_t leds;

    uint32_t switches;

} Lx60FpgaState;

static void lx60_fpga_reset(void *opaque)

{

    Lx60FpgaState *s = opaque;

    s->leds = 0;

    s->switches = 0;

}

static uint64_t lx60_fpga_read(void *opaque, hwaddr addr,

        unsigned size)

{

    Lx60FpgaState *s = opaque;

    switch (addr) {

    case 0x0: /*build date code*/

        return 0x09272011;

    case 0x4: /*processor clock frequency, Hz*/

        return 10000000;

    case 0x8: /*LEDs (off = 0, on = 1)*/

        return s->leds;

    case 0xc: /*DIP switches (off = 0, on = 1)*/

        return s->switches;

    }

    return 0;

}

static void lx60_fpga_write(void *opaque, hwaddr addr,

        uint64_t val, unsigned size)

{

    Lx60FpgaState *s = opaque;

    switch (addr) {

    case 0x8: /*LEDs (off = 0, on = 1)*/

        s->leds = val;

        break;

    case 0x10: /*board reset*/

        if (val == 0xdead) {

            qemu_system_reset_request();

        }

        break;

    }

}

static const MemoryRegionOps lx60_fpga_ops = {

    .read = lx60_fpga_read,

    .write = lx60_fpga_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static Lx60FpgaState *lx60_fpga_init(MemoryRegion *address_space,

        hwaddr base)

{

    Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));

    memory_region_init_io(&s->iomem, &lx60_fpga_ops, s,

            "lx60.fpga", 0x10000);

    memory_region_add_subregion(address_space, base, &s->iomem);

    lx60_fpga_reset(s);

    qemu_register_reset(lx60_fpga_reset, s);

    return s;

}

static void lx60_net_init(MemoryRegion *address_space,

        hwaddr base,

        hwaddr descriptors,

        hwaddr buffers,

        qemu_irq irq, NICInfo *nd)

{

    DeviceState *dev;

    SysBusDevice *s;

    MemoryRegion *ram;

    dev = qdev_create(NULL, "open_eth");

    qdev_set_nic_properties(dev, nd);

    qdev_init_nofail(dev);

    s = sysbus_from_qdev(dev);

    sysbus_connect_irq(s, 0, irq);

    memory_region_add_subregion(address_space, base,

            sysbus_mmio_get_region(s, 0));

    memory_region_add_subregion(address_space, descriptors,

            sysbus_mmio_get_region(s, 1));

    ram = g_malloc(sizeof(*ram));

    memory_region_init_ram(ram, "open_eth.ram", 16384);

    vmstate_register_ram_global(ram);

    memory_region_add_subregion(address_space, buffers, ram);

}

static uint64_t translate_phys_addr(void *env, uint64_t addr)

{

    return cpu_get_phys_page_debug(env, addr);

}

static void lx60_reset(void *opaque)

{

    XtensaCPU *cpu = opaque;

    cpu_reset(CPU(cpu));

}

static void lx_init(const LxBoardDesc *board, QEMUMachineInitArgs *args)

{

#ifdef TARGET_WORDS_BIGENDIAN

    int be = 1;

#else

    int be = 0;

#endif

    MemoryRegion *system_memory = get_system_memory();

    XtensaCPU *cpu = NULL;

    CPUXtensaState *env = NULL;

    MemoryRegion *ram, *rom, *system_io;

    DriveInfo *dinfo;

    pflash_t *flash = NULL;

    const char *cpu_model = args->cpu_model;

    const char *kernel_filename = args->kernel_filename;

    const char *kernel_cmdline = args->kernel_cmdline;

    int n;

    if (!cpu_model) {

        cpu_model = XTENSA_DEFAULT_CPU_MODEL;

    }

    for (n = 0; n < smp_cpus; n++) {

        cpu = cpu_xtensa_init(cpu_model);

        if (cpu == NULL) {

            fprintf(stderr, "Unable to find CPU definition\n");

            exit(1);

        }

        env = &cpu->env;

        env->sregs[PRID] = n;

        qemu_register_reset(lx60_reset, cpu);

        /* Need MMU initialized prior to ELF loading,

         * so that ELF gets loaded into virtual addresses

         */

        cpu_reset(CPU(cpu));

    }

    ram = g_malloc(sizeof(*ram));

    memory_region_init_ram(ram, "lx60.dram", args->ram_size);

    vmstate_register_ram_global(ram);

    memory_region_add_subregion(system_memory, 0, ram);

    system_io = g_malloc(sizeof(*system_io));

    memory_region_init(system_io, "lx60.io", 224 * 1024 * 1024);

    memory_region_add_subregion(system_memory, 0xf0000000, system_io);

    lx60_fpga_init(system_io, 0x0d020000);

    if (nd_table[0].used) {

        lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,

                xtensa_get_extint(env, 1), nd_table);

    }

    if (!serial_hds[0]) {

        serial_hds[0] = qemu_chr_new("serial0", "null", NULL);

    }

    serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0),

            115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);

    dinfo = drive_get(IF_PFLASH, 0, 0);

    if (dinfo) {

        flash = pflash_cfi01_register(0xf8000000,

                NULL, "lx60.io.flash", board->flash_size,

                dinfo->bdrv, board->flash_sector_size,

                board->flash_size / board->flash_sector_size,

                4, 0x0000, 0x0000, 0x0000, 0x0000, be);

        if (flash == NULL) {

            fprintf(stderr, "Unable to mount pflash\n");

            exit(1);

        }

    }

    /* Use presence of kernel file name as 'boot from SRAM' switch. */

    if (kernel_filename) {

        rom = g_malloc(sizeof(*rom));

        memory_region_init_ram(rom, "lx60.sram", board->sram_size);

        vmstate_register_ram_global(rom);

        memory_region_add_subregion(system_memory, 0xfe000000, rom);

        /* Put kernel bootparameters to the end of that SRAM */

        if (kernel_cmdline) {

            size_t cmdline_size = strlen(kernel_cmdline) + 1;

            size_t bp_size = sizeof(BpTag[4]) + cmdline_size;

            uint32_t tagptr = (0xfe000000 + board->sram_size - bp_size) & ~0xff;

            env->regs[2] = tagptr;

            tagptr = put_tag(tagptr, 0x7b0b, 0, NULL);

            if (cmdline_size > 1) {

                tagptr = put_tag(tagptr, 0x1001,

                        cmdline_size, kernel_cmdline);

            }

            tagptr = put_tag(tagptr, 0x7e0b, 0, NULL);

        }

        uint64_t elf_entry;

        uint64_t elf_lowaddr;

        int success = load_elf(kernel_filename, translate_phys_addr, env,

                &elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0);

        if (success > 0) {

            env->pc = elf_entry;

        }

    } else {

        if (flash) {

            MemoryRegion *flash_mr = pflash_cfi01_get_memory(flash);

            MemoryRegion *flash_io = g_malloc(sizeof(*flash_io));

            memory_region_init_alias(flash_io, "lx60.flash",

                    flash_mr, 0, board->flash_size);

            memory_region_add_subregion(system_memory, 0xfe000000,

                    flash_io);

        }

    }

}

static void xtensa_lx60_init(QEMUMachineInitArgs *args)

{

    static const LxBoardDesc lx60_board = {

        .flash_size = 0x400000,

        .flash_sector_size = 0x10000,

        .sram_size = 0x20000,

    };

    lx_init(&lx60_board, args);

}

static void xtensa_lx200_init(QEMUMachineInitArgs *args)

{

    static const LxBoardDesc lx200_board = {

        .flash_size = 0x1000000,

        .flash_sector_size = 0x20000,

        .sram_size = 0x2000000,

    };

    lx_init(&lx200_board, args);

}

static QEMUMachine xtensa_lx60_machine = {

    .name = "lx60",

    .desc = "lx60 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",

    .init = xtensa_lx60_init,

    .max_cpus = 4,

};

static QEMUMachine xtensa_lx200_machine = {

    .name = "lx200",

    .desc = "lx200 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",

    .init = xtensa_lx200_init,

    .max_cpus = 4,

};

static void xtensa_lx_machines_init(void)

{

    qemu_register_machine(&xtensa_lx60_machine);

    qemu_register_machine(&xtensa_lx200_machine);

}

machine_init(xtensa_lx_machines_init);