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root/bsp/boot/x86/pc/startup.c

DEFINITIONS

1. bootinfo_init
2. startup

   1 /*-
   2  * Copyright (c) 2005-2009, 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  */
  30 #include <sys/param.h>
  31 #include <sys/bootinfo.h>
  32 #include <boot.h>
  34 #define SCREEN_80x25 1
  35 /* #define SCREEN_80x50 1 */
  37 extern paddr_t  lo_mem;
  38 extern paddr_t  hi_mem;
  40 /*
  41  * Setup boot information.
  42  *
  43  * Note: We already got the memory size via BIOS call in head.S.
  44  */
  45 static void
bootinfo_init(void)
  47 {
  48         struct bootinfo *bi = bootinfo;
  50         /*
  51          * Screen size
  52          */
  53 #ifdef SCREEN_80x25
bi->video.text_x = 80;
bi->video.text_y = 25;
  56 #else
bi->video.text_x = 80;
bi->video.text_y = 50;
  59 #endif
  61         /*
  62          * Main memory
  63          */
bi->ram[0].base = 0;
bi->ram[0].size = (size_t)((1024 + hi_mem) * 1024);
bi->ram[0].type = MT_USABLE;
bi->nr_rams = 1;
  69         /*
  70          * Add BIOS ROM and VRAM area
  71          */
  72         if (hi_mem != 0) {
bi->ram[1].base = lo_mem * 1024;
bi->ram[1].size = (size_t)((1024 - lo_mem) * 1024);
bi->ram[1].type = MT_MEMHOLE;
bi->nr_rams++;
  77         }
  78 }
  80 void
startup(void)
  82 {
bootinfo_init();
  85 }