| 1 | #
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| 2 | # Copyright (c) 2001-2004 Jakub Jermar
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| 3 | # Copyright (c) 2005-2006 Martin Decky
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| 4 | # All rights reserved.
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| 5 | #
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| 6 | # Redistribution and use in source and binary forms, with or without
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| 7 | # modification, are permitted provided that the following conditions
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| 8 | # are met:
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| 9 | #
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| 10 | # - Redistributions of source code must retain the above copyright
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| 11 | # notice, this list of conditions and the following disclaimer.
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| 12 | # - Redistributions in binary form must reproduce the above copyright
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| 13 | # notice, this list of conditions and the following disclaimer in the
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| 14 | # documentation and/or other materials provided with the distribution.
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| 15 | # - The name of the author may not be used to endorse or promote products
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| 16 | # derived from this software without specific prior written permission.
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| 17 | #
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| 18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | #
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| 29 |
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| 30 | #include <arch/boot/boot.h>
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| 31 | #include <arch/boot/memmap.h>
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| 32 | #include <arch/mm/page.h>
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| 33 | #include <arch/pm.h>
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| 34 |
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| 35 | #define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
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| 36 |
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| 37 | .section K_TEXT_START, "ax"
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| 38 |
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| 39 | .code32
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| 40 | .align 4
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| 41 | .global multiboot_image_start
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| 42 | multiboot_header:
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| 43 | .long MULTIBOOT_HEADER_MAGIC
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| 44 | .long MULTIBOOT_HEADER_FLAGS
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| 45 | .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum
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| 46 | .long multiboot_header
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| 47 | .long unmapped_ktext_start
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| 48 | .long 0
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| 49 | .long 0
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| 50 | .long multiboot_image_start
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| 51 |
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| 52 | multiboot_image_start:
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| 53 | movl $START_STACK, %esp # initialize stack pointer
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| 54 | lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register
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| 55 |
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| 56 | movw $selector(KDATA_DES), %cx
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| 57 | movw %cx, %es
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| 58 | movw %cx, %fs
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| 59 | movw %cx, %gs
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| 60 | movw %cx, %ds # kernel data + stack
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| 61 | movw %cx, %ss
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| 62 |
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| 63 | jmpl $selector(KTEXT_DES), $multiboot_meeting_point
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| 64 | multiboot_meeting_point:
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| 65 |
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| 66 | pushl %ebx # save parameters from GRUB
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| 67 | pushl %eax
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| 68 |
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| 69 | #ifdef CONFIG_FB
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| 70 | mov $vesa_init, %esi
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| 71 | mov $VESA_INIT_SEGMENT << 4, %edi
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| 72 | mov $e_vesa_init - vesa_init, %ecx
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| 73 | cld
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| 74 | rep movsb
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| 75 |
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| 76 | mov $VESA_INIT_SEGMENT << 4, %edi
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| 77 | jmpl %edi
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| 78 |
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| 79 | vesa_meeting_point:
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| 80 |
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| 81 | mov %esi, KA2PA(vesa_ph_addr)
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| 82 | mov %di, KA2PA(vesa_height)
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| 83 | shr $16, %edi
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| 84 | mov %di, KA2PA(vesa_width)
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| 85 | mov %bx, KA2PA(vesa_scanline)
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| 86 | shr $16, %ebx
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| 87 | mov %bx, KA2PA(vesa_bpp)
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| 88 | #endif
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| 89 |
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| 90 | call map_kernel # map kernel and turn paging on
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| 91 |
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| 92 | popl %eax
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| 93 | popl %ebx
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| 94 | cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature
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| 95 | je valid_boot
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| 96 |
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| 97 | xorl %ecx, %ecx # no memory size or map available
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| 98 | movl %ecx, e801memorysize
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| 99 | movl %ecx, e820counter
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| 100 |
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| 101 | jmp invalid_boot
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| 102 |
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| 103 | valid_boot:
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| 104 |
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| 105 | movl (%ebx), %eax # ebx = physical address of struct multiboot_info
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| 106 |
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| 107 | bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)
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| 108 | jc mem_valid
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| 109 |
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| 110 | xorl %ecx, %ecx
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| 111 | jmp mem_invalid
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| 112 |
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| 113 | mem_valid:
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| 114 | movl 4(%ebx), %ecx # mbi->mem_lower
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| 115 | addl 8(%ebx), %ecx # mbi->mem_upper
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| 116 |
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| 117 | mem_invalid:
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| 118 | movl %ecx, e801memorysize
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| 119 |
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| 120 | bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)
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| 121 | jc mods_valid
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| 122 |
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| 123 | xorl %ecx, %ecx
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| 124 | movl %ecx, init
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| 125 | jmp mods_end
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| 126 |
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| 127 | mods_valid:
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| 128 |
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| 129 | movl 20(%ebx), %ecx # mbi->mods_count
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| 130 | movl %ecx, init
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| 131 |
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| 132 | cmpl $0, %ecx
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| 133 | je mods_end
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| 134 |
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| 135 | movl 24(%ebx), %esi # mbi->mods_addr
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| 136 | movl $init, %edi
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| 137 |
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| 138 | mods_loop:
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| 139 |
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| 140 | movl 0(%esi), %edx # mods->mod_start
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| 141 | addl $0x80000000, %edx
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| 142 | movl %edx, 4(%edi)
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| 143 |
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| 144 | movl 4(%esi), %edx
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| 145 | subl 0(%esi), %edx # mods->mod_end - mods->mod_start
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| 146 | movl %edx, 8(%edi)
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| 147 |
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| 148 | addl $16, %esi
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| 149 | addl $8 , %edi
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| 150 |
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| 151 | loop mods_loop
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| 152 |
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| 153 | mods_end:
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| 154 |
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| 155 | bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid)
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| 156 | jc mmap_valid
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| 157 |
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| 158 | xorl %edx, %edx
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| 159 | jmp mmap_invalid
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| 160 |
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| 161 | mmap_valid:
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| 162 | movl 44(%ebx), %ecx # mbi->mmap_length
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| 163 | movl 48(%ebx), %esi # mbi->mmap_addr
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| 164 | movl $e820table, %edi
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| 165 | xorl %edx, %edx
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| 166 |
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| 167 | mmap_loop:
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| 168 | cmpl $0, %ecx
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| 169 | jle mmap_end
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| 170 |
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| 171 | movl 4(%esi), %eax # mmap->base_addr_low
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| 172 | movl %eax, (%edi)
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| 173 |
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| 174 | movl 8(%esi), %eax # mmap->base_addr_high
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| 175 | movl %eax, 4(%edi)
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| 176 |
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| 177 | movl 12(%esi), %eax # mmap->length_low
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| 178 | movl %eax, 8(%edi)
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| 179 |
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| 180 | movl 16(%esi), %eax # mmap->length_high
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| 181 | movl %eax, 12(%edi)
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| 182 |
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| 183 | movl 20(%esi), %eax # mmap->type
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| 184 | movl %eax, 16(%edi)
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| 185 |
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| 186 | movl (%esi), %eax # mmap->size
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| 187 | addl $0x4, %eax
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| 188 | addl %eax, %esi
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| 189 | subl %eax, %ecx
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| 190 | addl $MEMMAP_E820_RECORD_SIZE, %edi
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| 191 | incl %edx
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| 192 | jmp mmap_loop
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| 193 |
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| 194 | mmap_end:
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| 195 |
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| 196 | mmap_invalid:
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| 197 | movl %edx, e820counter
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| 198 |
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| 199 | invalid_boot:
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| 200 |
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| 201 | #ifdef CONFIG_SMP
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| 202 |
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| 203 | # copy AP bootstrap routines below 1 MB
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| 204 |
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| 205 | movl $BOOT_OFFSET, %esi
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| 206 | movl $AP_BOOT_OFFSET, %edi
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| 207 | movl $_hardcoded_unmapped_size, %ecx
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| 208 | cld
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| 209 | rep movsb
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| 210 |
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| 211 | #endif
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| 212 |
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| 213 | call main_bsp # never returns
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| 214 |
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| 215 | cli
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| 216 | hlt
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| 217 |
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| 218 | .global map_kernel
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| 219 | map_kernel:
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| 220 | #
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| 221 | # Here we setup mapping for both the unmapped and mapped sections of the kernel.
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| 222 | # For simplicity, we map the entire 4G space.
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| 223 | #
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| 224 | movl %cr4, %ecx
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| 225 | orl $(1<<4), %ecx
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| 226 | movl %ecx, %cr4 # turn PSE on
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| 227 |
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| 228 | movl $(page_directory+0), %esi
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| 229 | movl $(page_directory+2048), %edi
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| 230 | xorl %ecx, %ecx
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| 231 | xorl %ebx, %ebx
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| 232 | 0:
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| 233 | movl $((1<<7)|(1<<0)), %eax
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| 234 | orl %ebx, %eax
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| 235 | movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M
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| 236 | movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M
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| 237 | addl $(4*1024*1024), %ebx
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| 238 |
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| 239 | incl %ecx
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| 240 | cmpl $512, %ecx
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| 241 | jl 0b
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| 242 |
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| 243 | movl %esi, %cr3
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| 244 |
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| 245 | # turn paging on
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| 246 | movl %cr0, %ebx
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| 247 | orl $(1<<31), %ebx
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| 248 | movl %ebx, %cr0
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| 249 | ret
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| 250 |
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| 251 | #ifdef CONFIG_FB
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| 252 | vesa_init:
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| 253 | jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
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| 254 |
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| 255 | .code16
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| 256 | vesa_init_real:
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| 257 |
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| 258 | mov %cr0, %eax
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| 259 | and $~1, %eax
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| 260 | mov %eax, %cr0
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| 261 |
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| 262 | jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
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| 263 |
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| 264 | vesa_init_real2:
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| 265 |
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| 266 | mov $VESA_INIT_SEGMENT, %bx
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| 267 |
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| 268 | mov %bx, %es
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| 269 | mov %bx, %fs
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| 270 | mov %bx, %gs
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| 271 | mov %bx, %ds
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| 272 | mov %bx, %ss
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| 273 |
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| 274 | movl %esp, %eax
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| 275 | movl $0x0000fffc, %esp
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| 276 | movl $0x0000fffc, %ebp
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| 277 | pushl %eax
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| 278 |
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| 279 | #define VESA_INFO_SIZE 1024
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| 280 |
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| 281 | #define VESA_MODE_LIST_PTR_OFFSET 14
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| 282 | #define VESA_MODE_WIDTH_OFFSET 18
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| 283 | #define VESA_MODE_HEIGHT_OFFSET 20
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| 284 | #define VESA_MODE_BPP_OFFSET 25
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| 285 | #define VESA_MODE_SCANLINE_OFFSET 16
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| 286 | #define VESA_MODE_PHADDR_OFFSET 40
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| 287 |
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| 288 | #define VESA_END_OF_MODES 0xffff
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| 289 |
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| 290 | #define VESA_OK 0x4f
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| 291 |
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| 292 | #define VESA_GET_INFO 0x4f00
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| 293 | #define VESA_GET_MODE_INFO 0x4f01
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| 294 | #define VESA_SET_MODE 0x4f02
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| 295 |
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| 296 | #define CONFIG_VESA_BPP_a 255
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| 297 |
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| 298 | #if CONFIG_VESA_BPP == 24
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| 299 | #undef CONFIG_VESA_BPP_a
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| 300 | #define CONFIG_VESA_BPP_a 32
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| 301 | #endif
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| 302 |
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| 303 | mov $VESA_GET_INFO, %ax
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| 304 | mov $e_vesa_init - vesa_init, %di
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| 305 | push %di
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| 306 | int $0x10
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| 307 |
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| 308 | pop %di
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| 309 | cmp $VESA_OK, %al
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| 310 | jnz 0f
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| 311 |
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| 312 | mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
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| 313 | mov %si, %gs
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| 314 | mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
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| 315 |
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| 316 | add $VESA_INFO_SIZE, %di
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| 317 |
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| 318 | 1:# Try next mode
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| 319 | mov %gs:(%si), %cx
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| 320 | cmp $VESA_END_OF_MODES, %cx
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| 321 | jz 0f
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| 322 |
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| 323 | inc %si
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| 324 | inc %si
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| 325 | push %cx
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| 326 | push %di
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| 327 | push %si
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| 328 | mov $VESA_GET_MODE_INFO, %ax
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| 329 | int $0x10
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| 330 |
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| 331 | pop %si
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| 332 | pop %di
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| 333 | pop %cx
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| 334 | cmp $VESA_OK, %al
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| 335 | jnz 0f
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| 336 |
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| 337 | mov $CONFIG_VESA_WIDTH, %ax
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| 338 | cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
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| 339 | jnz 1b
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| 340 |
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| 341 | mov $CONFIG_VESA_HEIGHT,%ax
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| 342 | cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
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| 343 | jnz 1b
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| 344 |
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| 345 | mov $CONFIG_VESA_BPP, %al
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| 346 | cmp VESA_MODE_BPP_OFFSET(%di), %al
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| 347 | jz 2f
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| 348 |
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| 349 | mov $CONFIG_VESA_BPP_a, %al
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| 350 | cmp VESA_MODE_BPP_OFFSET(%di), %al
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| 351 | jnz 1b
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| 352 |
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| 353 | 2:
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| 354 |
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| 355 | mov %cx, %bx
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| 356 | or $0xc000, %bx
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| 357 | push %di
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| 358 | mov $VESA_SET_MODE, %ax
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| 359 | int $0x10
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| 360 |
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| 361 | pop %di
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| 362 | cmp $VESA_OK, %al
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| 363 | jnz 0f
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| 364 |
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| 365 | mov VESA_MODE_PHADDR_OFFSET(%di), %esi
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| 366 | mov VESA_MODE_WIDTH_OFFSET(%di), %ax
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| 367 | shl $16, %eax
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| 368 | mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
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| 369 | mov VESA_MODE_BPP_OFFSET(%di), %bl
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| 370 | xor %bh, %bh
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| 371 | shl $16, %ebx
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| 372 | mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
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| 373 | mov %eax, %edi
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| 374 |
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| 375 | 8:
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| 376 |
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| 377 | mov %cr0, %eax
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| 378 | or $1, %eax
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| 379 | mov %eax, %cr0
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| 380 |
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| 381 | jmp 9f
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| 382 | 9:
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| 383 |
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| 384 | ljmpl $selector(KTEXT_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
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| 385 |
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| 386 | 0:# No prefered mode found
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| 387 | mov $0x111, %cx
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| 388 | push %di
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| 389 | push %cx
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| 390 | mov $VESA_GET_MODE_INFO, %ax
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| 391 | int $0x10
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| 392 |
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| 393 | pop %cx
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| 394 | pop %di
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| 395 | cmp $VESA_OK, %al
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| 396 | jnz 1f
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| 397 | jz 2b # Force relative jump
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| 398 |
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| 399 | 1:
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| 400 | mov $0x0003, %ax
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| 401 | int $0x10
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| 402 | mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA
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| 403 | xor %ax, %ax
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| 404 | jz 8b # Force relative jump
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| 405 |
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| 406 |
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| 407 | .code32
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| 408 | vesa_init_protect:
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| 409 | popl %esp
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| 410 |
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| 411 | movw $selector(KDATA_DES), %cx
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| 412 | movw %cx, %es
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| 413 | movw %cx, %fs
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| 414 | movw %cx, %gs
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| 415 | movw %cx, %ds # kernel data + stack
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| 416 | movw %cx, %ss
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| 417 |
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| 418 | jmpl $selector(KTEXT_DES), $vesa_meeting_point
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| 419 |
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| 420 | .align 4
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| 421 | e_vesa_init:
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| 422 | #endif
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| 423 |
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| 424 | .section K_DATA_START, "aw", @progbits
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| 425 |
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| 426 | .align 4096
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| 427 | page_directory:
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| 428 | .space 4096, 0
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