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 uint64_t translate_phys_addr(void *env, uint64_t addr)

{

    return cpu_get_phys_page_debug(env, addr);

}

static void sim_reset(void *opaque)

{

    XtensaCPU *cpu = opaque;

    cpu_reset(CPU(cpu));

}

static void sim_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)

{

    XtensaCPU *cpu = NULL;

    CPUXtensaState *env = NULL;

    MemoryRegion *ram, *rom;

    int n;

    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(sim_reset, cpu);

        /* Need MMU initialized prior to ELF loading,

         * so that ELF gets loaded into virtual addresses

         */

        sim_reset(cpu);

    }

    ram = g_malloc(sizeof(*ram));

    memory_region_init_ram(ram, "xtensa.sram", ram_size);

    vmstate_register_ram_global(ram);

    memory_region_add_subregion(get_system_memory(), 0, ram);

    rom = g_malloc(sizeof(*rom));

    memory_region_init_ram(rom, "xtensa.rom", 0x1000);

    vmstate_register_ram_global(rom);

    memory_region_add_subregion(get_system_memory(), 0xfe000000, rom);

    if (kernel_filename) {

        uint64_t elf_entry;

        uint64_t elf_lowaddr;

#ifdef TARGET_WORDS_BIGENDIAN

        int success = load_elf(kernel_filename, translate_phys_addr, env,

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

#else

        int success = load_elf(kernel_filename, translate_phys_addr, env,

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

#endif

        if (success > 0) {

            env->pc = elf_entry;

        }

    }

}

static void xtensa_sim_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 = XTENSA_DEFAULT_CPU_MODEL;

    }

    sim_init(ram_size, boot_device, kernel_filename, kernel_cmdline,

            initrd_filename, cpu_model);

}

static QEMUMachine xtensa_sim_machine = {

    .name = "sim",

    .desc = "sim machine (" XTENSA_DEFAULT_CPU_MODEL ")",

    .is_default = true,

    .init = xtensa_sim_init,

    .max_cpus = 4,

};

static void xtensa_sim_machine_init(void)

{

    qemu_register_machine(&xtensa_sim_machine);

}

machine_init(xtensa_sim_machine_init);