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Annotation of prex/boot/i386/pc/bootinfo.c, Revision 1.1

1.1     ! nbrk        1: /*-
        !             2:  * Copyright (c) 2005, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: #include <boot.h>
        !            31: #include "platform.h"
        !            32:
        !            33: #define SCREEN_80x25 1
        !            34: /* #define SCREEN_80x50 1 */
        !            35:
        !            36: extern paddr_t lo_mem;
        !            37: extern paddr_t hi_mem;
        !            38:
        !            39: /*
        !            40:  * Setup boot information.
        !            41:  *
        !            42:  * Note: The memory size are already got via BIOS call in head.S.
        !            43:  */
        !            44: void
        !            45: setup_bootinfo(struct boot_info **bpp)
        !            46: {
        !            47:        struct boot_info *bp;
        !            48:
        !            49:        bp = (struct boot_info *)BOOT_INFO;
        !            50:        memset(bp, 0, BOOT_INFO_SIZE);
        !            51:
        !            52:        bp->archive = (paddr_t)ARCHIVE_START;
        !            53:
        !            54: #ifdef SCREEN_80x25
        !            55:        bp->video.text_x = 80;
        !            56:        bp->video.text_y = 25;
        !            57: #else
        !            58:        bp->video.text_x = 80;
        !            59:        bp->video.text_y = 50;
        !            60: #endif
        !            61: #ifdef CONFIG_MIN_MEMORY
        !            62:        lo_mem = 512;   /* 512KB */
        !            63:        hi_mem = 0;
        !            64: #endif
        !            65:        bp->main_mem.start = 0;
        !            66:        bp->main_mem.size = (size_t)((1024 + hi_mem) * 1024);
        !            67:        if (bp->main_mem.size == 0)
        !            68:                panic("memory size is 0!");
        !            69:
        !            70:        *bpp = bp;
        !            71:
        !            72:        if (hi_mem != 0) {
        !            73:                reserve_memory(lo_mem * 1024,
        !            74:                               (size_t)((1024 - lo_mem) * 1024));
        !            75:        }
        !            76: }