| 1 | /*
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| 2 | * Copyright (c) 2011 Martin Decky
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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 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #include <abi/asmtool.h>
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| 30 | #include <arch/boot/boot.h>
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| 31 | #include <arch/pm.h>
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| 32 | #include <arch/cpuid.h>
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| 33 | #include <genarch/multiboot/multiboot2.h>
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| 34 |
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| 35 | .section K_TEXT_START, "ax"
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| 36 |
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| 37 | .code32
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| 38 |
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| 39 | .align 8
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| 40 | multiboot2_header_start:
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| 41 | .long MULTIBOOT2_HEADER_MAGIC
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| 42 | .long MULTIBOOT2_HEADER_ARCH_I386
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| 43 | .long multiboot2_header_end - multiboot2_header_start
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| 44 | .long -(MULTIBOOT2_HEADER_MAGIC + MULTIBOOT2_HEADER_ARCH_I386 + (multiboot2_header_end - multiboot2_header_start))
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| 45 |
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| 46 | /* Information request tag */
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| 47 | .align 8
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| 48 | tag_info_req_start:
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| 49 | .word MULTIBOOT2_TAG_INFO_REQ
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| 50 | .word MULTIBOOT2_FLAGS_REQUIRED
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| 51 | .long tag_info_req_end - tag_info_req_start
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| 52 | .long MULTIBOOT2_TAG_CMDLINE
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| 53 | .long MULTIBOOT2_TAG_MODULE
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| 54 | .long MULTIBOOT2_TAG_MEMMAP
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| 55 | #ifdef CONFIG_FB
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| 56 | .long MULTIBOOT2_TAG_FBINFO
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| 57 | #endif
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| 58 | tag_info_req_end:
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| 59 |
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| 60 | /* Flags tag */
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| 61 | .align 8
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| 62 | tag_flags_start:
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| 63 | .word MULTIBOOT2_TAG_FLAGS
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| 64 | .word MULTIBOOT2_FLAGS_REQUIRED
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| 65 | .long tag_flags_end - tag_flags_start
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| 66 | .long MULTIBOOT2_FLAGS_CONSOLE
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| 67 | tag_flags_end:
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| 68 |
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| 69 | #ifdef CONFIG_FB
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| 70 | /* Framebuffer tag */
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| 71 | .align 8
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| 72 | tag_framebuffer_start:
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| 73 | .word MULTIBOOT2_TAG_FRAMEBUFFER
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| 74 | .word MULTIBOOT2_FLAGS_REQUIRED
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| 75 | .long tag_framebuffer_end - tag_framebuffer_start
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| 76 | .long CONFIG_BFB_WIDTH
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| 77 | .long CONFIG_BFB_HEIGHT
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| 78 | .long CONFIG_BFB_BPP
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| 79 | tag_framebuffer_end:
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| 80 | #endif
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| 81 |
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| 82 | /* Module alignment tag */
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| 83 | .align 8
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| 84 | tag_module_align_start:
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| 85 | .word MULTIBOOT2_TAG_MODULE_ALIGN
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| 86 | .word MULTIBOOT2_FLAGS_REQUIRED
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| 87 | .long tag_module_align_end - tag_module_align_start
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| 88 | .long 0
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| 89 | tag_module_align_end:
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| 90 |
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| 91 | /* Tag terminator */
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| 92 | .align 8
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| 93 | tag_terminator_start:
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| 94 | .word MULTIBOOT2_TAG_TERMINATOR
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| 95 | .word MULTIBOOT2_FLAGS_REQUIRED
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| 96 | .long tag_terminator_end - tag_terminator_start
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| 97 | tag_terminator_end:
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| 98 | multiboot2_header_end:
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