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.h"

#include "boards.h"

#include "loader.h"

#include "elf.h"

#include "memory.h"

#include "exec-memory.h"

static void xtensa_sample_reset(void *env)

{

    cpu_reset(env);

}

static void xtensa_init(ram_addr_t ram_size,

        const char *boot_device,

        const char *kernel_filename, const char *kernel_cmdline,

        const char *initrd_filename, const char *cpu_model)

{

    CPUState *env = NULL;

    MemoryRegion *ram;

    const size_t dram_size = 0x10000;

    const size_t iram_size = 0x20000;

    int n;

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

        env = cpu_init(cpu_model);

        if (!env) {

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

            exit(1);

        }

        qemu_register_reset(xtensa_sample_reset, env);

        env->sregs[PRID] = n;

    }

    ram = g_malloc(sizeof(*ram));

    memory_region_init_ram(ram, NULL, "xtensa.ram",

            dram_size + iram_size + ram_size);

    memory_region_add_subregion(get_system_memory(),

            0x60000000 - dram_size - iram_size, ram);

    if (kernel_filename) {

        uint64_t elf_entry;

        uint64_t elf_lowaddr;

#ifdef TARGET_WORDS_BIGENDIAN

        int success = load_elf(kernel_filename, NULL, NULL, &elf_entry,

                &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);

#else

        int success = load_elf(kernel_filename, NULL, NULL, &elf_entry,

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

#endif

        if (success > 0) {

            env->pc = elf_entry;

        }

    }

}

static void xtensa_sample_init(ram_addr_t ram_size,

                     const char *boot_device,

                     const char *kernel_filename, const char *kernel_cmdline,

                     const char *initrd_filename, const char *cpu_model)

{

    if (!cpu_model) {

        cpu_model = "sample-xtensa-core";

    }

    xtensa_init(ram_size, boot_device, kernel_filename, kernel_cmdline,

                  initrd_filename, cpu_model);

}

static QEMUMachine xtensa_sample_machine = {

    .name = "sample-xtensa-machine",

    .desc = "Sample Xtensa machine (sample Xtensa core)",

    .init = xtensa_sample_init,

    .max_cpus = 4,

};

static void xtensa_sample_machine_init(void)

{

    qemu_register_machine(&xtensa_sample_machine);

}

machine_init(xtensa_sample_machine_init);