Archipelago » qemu

/*

 * CRIS image loading.

 *

 * Copyright (c) 2010 Edgar E. Iglesias, Axis Communications AB.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#include "hw.h"

#include "sysemu.h"

#include "loader.h"

#include "elf.h"

#include "cris-boot.h"

static void main_cpu_reset(void *opaque)

{

    CPUState *env = opaque;

    struct cris_load_info *li;

    li = env->load_info;

    cpu_reset(env);

    if (!li) {

        /* nothing more to do.  */

        return;

    }

    env->pc = li->entry;

    if (li->image_filename) {

        env->regs[8] = 0x56902387; /* RAM boot magic.  */

        env->regs[9] = 0x40004000 + li->image_size;

    }

    if (li->cmdline) {

        /* Let the kernel know we are modifying the cmdline.  */

        env->regs[10] = 0x87109563;

        env->regs[11] = 0x40000000;

    }

}

static uint64_t translate_kernel_address(void *opaque, uint64_t addr)

{

    return addr - 0x80000000LL;

}

void cris_load_image(CPUState *env, struct cris_load_info *li)

{

    uint64_t entry, high;

    int kcmdline_len;

    int image_size;

    env->load_info = li;

    /* Boots a kernel elf binary, os/linux-2.6/vmlinux from the axis 

       devboard SDK.  */

    image_size = load_elf(li->image_filename, translate_kernel_address, NULL,

                          &entry, NULL, &high, 0, ELF_MACHINE, 0);

    li->entry = entry;

    if (image_size < 0) {

        /* Takes a kimage from the axis devboard SDK.  */

        image_size = load_image_targphys(li->image_filename, 0x40004000,

                                         ram_size);

        li->entry = 0x40004000;

    }

    if (image_size < 0) {

        fprintf(stderr, "qemu: could not load kernel '%s'\n",

                li->image_filename);

        exit(1);

    }

    if (li->cmdline && (kcmdline_len = strlen(li->cmdline))) {

        if (kcmdline_len > 256) {

            fprintf(stderr, "Too long CRIS kernel cmdline (max 256)\n");

            exit(1);

        }

        pstrcpy_targphys("cmdline", 0x40000000, 256, li->cmdline);

    }

    qemu_register_reset(main_cpu_reset, env);

}