source: mainline/boot/arch/mips32/src/main.c

/*
 * Copyright (c) 2005 Martin Decky
 * 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.
 */

#include <arch/main.h>
#include <arch/arch.h>
#include <arch/asm.h>
#include <arch/types.h>
#include <halt.h>
#include <printf.h>
#include <mem.h>
#include <version.h>
#include <macros.h>
#include <align.h>
#include <str.h>
#include <errno.h>
#include <payload.h>
#include <kernel.h>

static bootinfo_t *bootinfo = (bootinfo_t *) PA2KA(BOOTINFO_OFFSET);
static uint32_t *cpumap = (uint32_t *) PA2KA(CPUMAP_OFFSET);

void bootstrap(int kargc, char **kargv)
{
        version_print();

        printf("\nMemory statistics\n");
        printf(" %p|%p: CPU map\n", (void *) PA2KA(CPUMAP_OFFSET),
            (void *) CPUMAP_OFFSET);
        printf(" %p|%p: bootstrap stack\n", (void *) PA2KA(STACK_OFFSET),
            (void *) STACK_OFFSET);
        printf(" %p|%p: boot info structure\n",
            (void *) PA2KA(BOOTINFO_OFFSET), (void *) BOOTINFO_OFFSET);
        printf(" %p|%p: kernel entry point\n", (void *) PA2KA(BOOT_OFFSET),
            (void *) BOOT_OFFSET);
        printf(" %p|%p: bootloader entry point\n",
            (void *) PA2KA(LOADER_OFFSET), (void *) LOADER_OFFSET);

        uint8_t *kernel_start = (uint8_t *) PA2KA(BOOT_OFFSET);
        // FIXME: Use the correct value.
        uint8_t *ram_end = kernel_start + (1 << 24);

        // TODO: Make sure that the I-cache, D-cache and memory are coherent.
        //       (i.e. provide the clear_cache callback)

        extract_payload(&bootinfo->taskmap, kernel_start, ram_end,
            (uintptr_t) kernel_start, NULL);

        printf("Copying CPU map ... \n");

        bootinfo->cpumap = 0;
        for (int i = 0; i < CPUMAP_MAX_RECORDS; i++) {
                if (cpumap[i] != 0)
                        bootinfo->cpumap |= (1 << i);
        }

        str_cpy(bootinfo->bootargs, sizeof(bootinfo->bootargs),
            (kargc > 1) ? kargv[1] : "");

        uintptr_t entry = check_kernel(kernel_start);

        printf("Booting the kernel...\n");
        jump_to_kernel((void *) entry, bootinfo);
}