source: mainline/boot/arch/arm32/loader/main.c@ 1e48aca1

/*
 * Copyright (c) 2007 Michal Kebrt
 * 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
 */


/** @addtogroup arm32boot
 * @{
 */
/** @file
 *  @brief Bootstrap.
 */


#include "main.h"
#include "asm.h"
#include "_components.h"
#include <printf.h>
#include <align.h>
#include <macros.h>
#include <string.h>

#include "mm.h"

/** Kernel entry point address. */
#define KERNEL_VIRTUAL_ADDRESS 0x80200000


char *release = STRING(RELEASE);

#ifdef REVISION
        char *revision = ", revision " STRING(REVISION);
#else
        char *revision = "";
#endif

#ifdef TIMESTAMP
        char *timestamp = "\nBuilt on " STRING(TIMESTAMP);
#else
        char *timestamp = "";
#endif


/** Prints bootloader version information. */
static void version_print(void)
{
        printf("HelenOS ARM32 Bootloader\nRelease %s%s%s\nCopyright (c) 2007 HelenOS project\n", 
                release, revision, timestamp);
}


/** Copies all images (kernel + user tasks) to #KERNEL_VIRTUAL_ADDRESS and jumps there. */
void bootstrap(void)
{
        mmu_start();
        version_print();

        component_t components[COMPONENTS];
        init_components(components);
        
        bootinfo_t bootinfo;
        
        printf("\nMemory statistics\n");
        printf(" kernel entry point at %L\n", KERNEL_VIRTUAL_ADDRESS);
        printf(" %L: boot info structure\n", &bootinfo);

        unsigned int top = 0;
        bootinfo.cnt = 0;
        unsigned int i, j;
        for (i = 0; i < COMPONENTS; i++) {
                printf(" %L: %s image (size %d bytes)\n", 
                    components[i].start, components[i].name, components[i].size);
                top = ALIGN_UP(top, KERNEL_PAGE_SIZE);
                if (i > 0) {
                        bootinfo.tasks[bootinfo.cnt].addr = ((void *) KERNEL_VIRTUAL_ADDRESS) + top;
                        bootinfo.tasks[bootinfo.cnt].size = components[i].size;
                        strncpy(bootinfo.tasks[bootinfo.cnt].name,
                            components[i].name, BOOTINFO_TASK_NAME_BUFLEN);
                        bootinfo.cnt++;
                }
                top += components[i].size;
        }
        j = bootinfo.cnt - 1; 

        printf("\nCopying components\n");

        for (i = COMPONENTS - 1; i > 0; i--, j--) {
                printf(" %s...", components[i].name);
                memcpy((void *)bootinfo.tasks[j].addr, components[i].start,
                    components[i].size);
                printf("done.\n");
        }
        
        printf("\nCopying kernel...");
        memcpy((void *)KERNEL_VIRTUAL_ADDRESS, components[0].start,
            components[0].size);
        printf("done.\n");

        printf("\nBooting the kernel...\n");
        jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS, &bootinfo);
}

/** @}
 */