scoutos / prex-0.9.0 / bsp / boot / x86 / pc / startup.c @ 03e9c04a
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| 1 | 03e9c04a | Brad Neuman | /*-
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| 2 | * Copyright (c) 2005-2009, Kohsuke Ohtani
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of the author nor the names of any co-contributors
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| 14 | * may be used to endorse or promote products derived from this software
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| 15 | * without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 27 | * SUCH DAMAGE.
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| 28 | */
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| 29 | |||
| 30 | #include <sys/param.h> |
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| 31 | #include <sys/bootinfo.h> |
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| 32 | #include <boot.h> |
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| 33 | |||
| 34 | #define SCREEN_80x25 1 |
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| 35 | /* #define SCREEN_80x50 1 */
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| 36 | |||
| 37 | extern paddr_t lo_mem;
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| 38 | extern paddr_t hi_mem;
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| 39 | |||
| 40 | /*
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| 41 | * Setup boot information.
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| 42 | *
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| 43 | * Note: We already got the memory size via BIOS call in head.S.
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| 44 | */
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| 45 | static void |
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| 46 | bootinfo_init(void)
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| 47 | {
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| 48 | struct bootinfo *bi = bootinfo;
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| 49 | |||
| 50 | /*
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| 51 | * Screen size
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| 52 | */
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| 53 | #ifdef SCREEN_80x25
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| 54 | bi->video.text_x = 80;
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| 55 | bi->video.text_y = 25;
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| 56 | #else
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| 57 | bi->video.text_x = 80;
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| 58 | bi->video.text_y = 50;
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| 59 | #endif
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| 60 | |||
| 61 | /*
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| 62 | * Main memory
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| 63 | */
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| 64 | bi->ram[0].base = 0; |
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| 65 | bi->ram[0].size = (size_t)((1024 + hi_mem) * 1024); |
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| 66 | bi->ram[0].type = MT_USABLE;
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| 67 | bi->nr_rams = 1;
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| 68 | |||
| 69 | /*
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| 70 | * Add BIOS ROM and VRAM area
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| 71 | */
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| 72 | if (hi_mem != 0) { |
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| 73 | bi->ram[1].base = lo_mem * 1024; |
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| 74 | bi->ram[1].size = (size_t)((1024 - lo_mem) * 1024); |
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| 75 | bi->ram[1].type = MT_MEMHOLE;
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| 76 | bi->nr_rams++; |
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| 77 | } |
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| 78 | } |
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| 79 | |||
| 80 | void
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| 81 | startup(void)
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| 82 | {
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| 83 | |||
| 84 | bootinfo_init(); |
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| 85 | } |