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root / prex-0.9.0 / bsp / boot / x86 / pc / startup.c @ 03e9c04a

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/*-
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 * Copyright (c) 2005-2009, Kohsuke Ohtani
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/param.h>
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#include <sys/bootinfo.h>
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#include <boot.h>
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#define SCREEN_80x25 1
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/* #define SCREEN_80x50 1 */
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extern paddr_t        lo_mem;
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extern paddr_t        hi_mem;
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/*
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 * Setup boot information.
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 *
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 * Note: We already got the memory size via BIOS call in head.S.
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 */
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static void
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bootinfo_init(void)
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{
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        struct bootinfo *bi = bootinfo;
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        /*
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         * Screen size
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         */
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#ifdef SCREEN_80x25
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        bi->video.text_x = 80;
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        bi->video.text_y = 25;
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#else
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        bi->video.text_x = 80;
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        bi->video.text_y = 50;
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#endif
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        /*
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         * Main memory
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         */
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        bi->ram[0].base = 0;
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        bi->ram[0].size = (size_t)((1024 + hi_mem) * 1024);
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        bi->ram[0].type = MT_USABLE;
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        bi->nr_rams = 1;
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        /*
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         * Add BIOS ROM and VRAM area
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         */
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        if (hi_mem != 0) {
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                bi->ram[1].base = lo_mem * 1024;
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                bi->ram[1].size = (size_t)((1024 - lo_mem) * 1024);
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                bi->ram[1].type = MT_MEMHOLE;
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                bi->nr_rams++;
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        }
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}
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void
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startup(void)
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{
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        bootinfo_init();
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}