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1805 | decky | 1 | # |
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 | |||
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 | |||
35 | .section __xen_guest |
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36 | .ascii "GUEST_OS=HelenOS," |
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37 | .ascii "XEN_VER=xen-3.0," |
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38 | .ascii "HYPERCALL_PAGE=0x2," |
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39 | .ascii "LOADER=generic," |
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40 | .ascii "PT_MODE_WRITABLE" |
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41 | .byte 0 |
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42 | |||
43 | #define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE) |
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44 | |||
45 | .section K_TEXT_START, "ax" |
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46 | |||
47 | KTEXT=8 |
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48 | KDATA=16 |
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49 | |||
50 | .code32 |
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51 | .align 4 |
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52 | .global multiboot_image_start |
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53 | multiboot_header: |
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54 | .long MULTIBOOT_HEADER_MAGIC |
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55 | .long MULTIBOOT_HEADER_FLAGS |
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56 | .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum |
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57 | .long multiboot_header |
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58 | .long unmapped_ktext_start |
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59 | .long 0 |
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60 | .long 0 |
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61 | .long multiboot_image_start |
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62 | |||
63 | multiboot_image_start: |
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64 | movl $START_STACK, %esp # initialize stack pointer |
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65 | lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register |
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66 | |||
67 | movw $KDATA, %cx |
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68 | movw %cx, %es |
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69 | movw %cx, %fs |
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70 | movw %cx, %gs |
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71 | movw %cx, %ds # kernel data + stack |
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72 | movw %cx, %ss |
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73 | |||
74 | jmpl $KTEXT, $multiboot_meeting_point |
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75 | multiboot_meeting_point: |
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76 | |||
77 | pushl %ebx # save parameters from GRUB |
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78 | pushl %eax |
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79 | |||
80 | #ifdef CONFIG_FB |
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81 | mov $vesa_init, %esi |
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82 | mov $VESA_INIT_SEGMENT << 4, %edi |
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83 | mov $e_vesa_init - vesa_init, %ecx |
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84 | cld |
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85 | rep movsb |
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86 | |||
87 | mov $VESA_INIT_SEGMENT << 4, %edi |
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88 | jmpl %edi |
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89 | |||
90 | vesa_meeting_point: |
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91 | |||
92 | mov %esi, KA2PA(vesa_ph_addr) |
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93 | mov %di, KA2PA(vesa_height) |
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94 | shr $16, %edi |
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95 | mov %di, KA2PA(vesa_width) |
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96 | mov %bx, KA2PA(vesa_scanline) |
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97 | shr $16, %ebx |
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98 | mov %bx, KA2PA(vesa_bpp) |
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99 | #endif |
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100 | |||
101 | call map_kernel # map kernel and turn paging on |
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102 | |||
103 | popl %eax |
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104 | popl %ebx |
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105 | cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature |
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106 | je valid_boot |
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107 | |||
108 | xorl %ecx, %ecx # no memory size or map available |
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109 | movl %ecx, e801memorysize |
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110 | movl %ecx, e820counter |
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111 | |||
112 | jmp invalid_boot |
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113 | |||
114 | valid_boot: |
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115 | |||
116 | movl (%ebx), %eax # ebx = physical address of struct multiboot_info |
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117 | |||
118 | bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid) |
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119 | jc mem_valid |
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120 | |||
121 | xorl %ecx, %ecx |
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122 | jmp mem_invalid |
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123 | |||
124 | mem_valid: |
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125 | movl 4(%ebx), %ecx # mbi->mem_lower |
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126 | addl 8(%ebx), %ecx # mbi->mem_upper |
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127 | |||
128 | mem_invalid: |
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129 | movl %ecx, e801memorysize |
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130 | |||
131 | bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid) |
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132 | jc mods_valid |
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133 | |||
134 | xorl %ecx, %ecx |
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135 | movl %ecx, init |
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136 | jmp mods_end |
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137 | |||
138 | mods_valid: |
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139 | |||
140 | movl 20(%ebx), %ecx # mbi->mods_count |
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141 | movl %ecx, init |
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142 | |||
143 | cmpl $0, %ecx |
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144 | je mods_end |
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145 | |||
146 | movl 24(%ebx), %esi # mbi->mods_addr |
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147 | movl $init, %edi |
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148 | |||
149 | mods_loop: |
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150 | |||
151 | movl 0(%esi), %edx # mods->mod_start |
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152 | addl $0x80000000, %edx |
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153 | movl %edx, 4(%edi) |
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154 | |||
155 | movl 4(%esi), %edx |
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156 | subl 0(%esi), %edx # mods->mod_end - mods->mod_start |
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157 | movl %edx, 8(%edi) |
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158 | |||
159 | addl $16, %esi |
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160 | addl $8 , %edi |
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161 | |||
162 | loop mods_loop |
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163 | |||
164 | mods_end: |
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165 | |||
166 | bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid) |
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167 | jc mmap_valid |
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168 | |||
169 | xorl %edx, %edx |
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170 | jmp mmap_invalid |
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171 | |||
172 | mmap_valid: |
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173 | movl 44(%ebx), %ecx # mbi->mmap_length |
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174 | movl 48(%ebx), %esi # mbi->mmap_addr |
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175 | movl $e820table, %edi |
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176 | xorl %edx, %edx |
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177 | |||
178 | mmap_loop: |
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179 | cmpl $0, %ecx |
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180 | jle mmap_end |
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181 | |||
182 | movl 4(%esi), %eax # mmap->base_addr_low |
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183 | movl %eax, (%edi) |
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184 | |||
185 | movl 8(%esi), %eax # mmap->base_addr_high |
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186 | movl %eax, 4(%edi) |
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187 | |||
188 | movl 12(%esi), %eax # mmap->length_low |
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189 | movl %eax, 8(%edi) |
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190 | |||
191 | movl 16(%esi), %eax # mmap->length_high |
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192 | movl %eax, 12(%edi) |
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193 | |||
194 | movl 20(%esi), %eax # mmap->type |
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195 | movl %eax, 16(%edi) |
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196 | |||
197 | movl (%esi), %eax # mmap->size |
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198 | addl $0x4, %eax |
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199 | addl %eax, %esi |
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200 | subl %eax, %ecx |
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201 | addl $MEMMAP_E820_RECORD_SIZE, %edi |
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202 | incl %edx |
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203 | jmp mmap_loop |
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204 | |||
205 | mmap_end: |
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206 | |||
207 | mmap_invalid: |
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208 | movl %edx, e820counter |
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209 | |||
210 | invalid_boot: |
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211 | |||
212 | #ifdef CONFIG_SMP |
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213 | |||
214 | # copy AP bootstrap routines below 1 MB |
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215 | |||
216 | movl $BOOT_OFFSET, %esi |
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217 | movl $AP_BOOT_OFFSET, %edi |
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218 | movl $_hardcoded_unmapped_size, %ecx |
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219 | cld |
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220 | rep movsb |
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221 | |||
222 | #endif |
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223 | |||
224 | call main_bsp # never returns |
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225 | |||
226 | cli |
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227 | hlt |
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228 | |||
229 | .global map_kernel |
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230 | map_kernel: |
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231 | # |
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232 | # Here we setup mapping for both the unmapped and mapped sections of the kernel. |
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233 | # For simplicity, we map the entire 4G space. |
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234 | # |
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235 | movl %cr4, %ecx |
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236 | orl $(1<<4), %ecx |
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237 | movl %ecx, %cr4 # turn PSE on |
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238 | |||
239 | movl $(page_directory+0), %esi |
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240 | movl $(page_directory+2048), %edi |
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241 | xorl %ecx, %ecx |
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242 | xorl %ebx, %ebx |
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243 | 0: |
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244 | movl $((1<<7)|(1<<0)), %eax |
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245 | orl %ebx, %eax |
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246 | movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M |
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247 | movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M |
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248 | addl $(4*1024*1024), %ebx |
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249 | |||
250 | incl %ecx |
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251 | cmpl $512, %ecx |
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252 | jl 0b |
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253 | |||
254 | movl %esi, %cr3 |
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255 | |||
256 | # turn paging on |
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257 | movl %cr0, %ebx |
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258 | orl $(1<<31), %ebx |
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259 | movl %ebx, %cr0 |
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260 | ret |
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261 | |||
262 | #ifdef CONFIG_FB |
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263 | vesa_init: |
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264 | jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init |
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265 | |||
266 | .code16 |
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267 | vesa_init_real: |
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268 | |||
269 | mov %cr0, %eax |
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270 | and $~1, %eax |
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271 | mov %eax, %cr0 |
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272 | |||
273 | jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init |
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274 | |||
275 | vesa_init_real2: |
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276 | |||
277 | mov $VESA_INIT_SEGMENT, %bx |
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278 | |||
279 | mov %bx, %es |
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280 | mov %bx, %fs |
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281 | mov %bx, %gs |
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282 | mov %bx, %ds |
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283 | mov %bx, %ss |
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284 | |||
285 | movl %esp, %eax |
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286 | movl $0x0000fffc, %esp |
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287 | movl $0x0000fffc, %ebp |
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288 | pushl %eax |
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289 | |||
290 | #define VESA_INFO_SIZE 1024 |
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291 | |||
292 | #define VESA_MODE_LIST_PTR_OFFSET 14 |
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293 | #define VESA_MODE_WIDTH_OFFSET 18 |
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294 | #define VESA_MODE_HEIGHT_OFFSET 20 |
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295 | #define VESA_MODE_BPP_OFFSET 25 |
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296 | #define VESA_MODE_SCANLINE_OFFSET 16 |
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297 | #define VESA_MODE_PHADDR_OFFSET 40 |
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298 | |||
299 | #define VESA_END_OF_MODES 0xffff |
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300 | |||
301 | #define VESA_OK 0x4f |
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302 | |||
303 | #define VESA_GET_INFO 0x4f00 |
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304 | #define VESA_GET_MODE_INFO 0x4f01 |
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305 | #define VESA_SET_MODE 0x4f02 |
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306 | |||
307 | #define CONFIG_VESA_BPP_a 255 |
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308 | |||
309 | #if CONFIG_VESA_BPP == 24 |
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310 | #undef CONFIG_VESA_BPP_a |
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311 | #define CONFIG_VESA_BPP_a 32 |
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312 | #endif |
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313 | |||
314 | mov $VESA_GET_INFO, %ax |
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315 | mov $e_vesa_init - vesa_init, %di |
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316 | push %di |
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317 | int $0x10 |
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318 | |||
319 | pop %di |
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320 | cmp $VESA_OK, %al |
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321 | jnz 0f |
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322 | |||
323 | mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si |
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324 | mov %si, %gs |
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325 | mov VESA_MODE_LIST_PTR_OFFSET(%di), %si |
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326 | |||
327 | add $VESA_INFO_SIZE, %di |
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328 | |||
329 | 1:# Try next mode |
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330 | mov %gs:(%si), %cx |
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331 | cmp $VESA_END_OF_MODES, %cx |
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332 | jz 0f |
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333 | |||
334 | inc %si |
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335 | inc %si |
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336 | push %cx |
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337 | push %di |
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338 | push %si |
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339 | mov $VESA_GET_MODE_INFO, %ax |
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340 | int $0x10 |
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341 | |||
342 | pop %si |
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343 | pop %di |
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344 | pop %cx |
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345 | cmp $VESA_OK, %al |
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346 | jnz 0f |
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347 | |||
348 | mov $CONFIG_VESA_WIDTH, %ax |
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349 | cmp VESA_MODE_WIDTH_OFFSET(%di), %ax |
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350 | jnz 1b |
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351 | |||
352 | mov $CONFIG_VESA_HEIGHT,%ax |
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353 | cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax |
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354 | jnz 1b |
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355 | |||
356 | mov $CONFIG_VESA_BPP, %al |
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357 | cmp VESA_MODE_BPP_OFFSET(%di), %al |
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358 | jz 2f |
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359 | |||
360 | mov $CONFIG_VESA_BPP_a, %al |
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361 | cmp VESA_MODE_BPP_OFFSET(%di), %al |
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362 | jnz 1b |
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363 | |||
364 | 2: |
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365 | |||
366 | mov %cx, %bx |
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367 | or $0xc000, %bx |
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368 | push %di |
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369 | mov $VESA_SET_MODE, %ax |
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370 | int $0x10 |
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371 | |||
372 | pop %di |
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373 | cmp $VESA_OK, %al |
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374 | jnz 0f |
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375 | |||
376 | mov VESA_MODE_PHADDR_OFFSET(%di), %esi |
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377 | mov VESA_MODE_WIDTH_OFFSET(%di), %ax |
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378 | shl $16, %eax |
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379 | mov VESA_MODE_HEIGHT_OFFSET(%di), %ax |
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380 | mov VESA_MODE_BPP_OFFSET(%di), %bl |
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381 | xor %bh, %bh |
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382 | shl $16, %ebx |
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383 | mov VESA_MODE_SCANLINE_OFFSET(%di), %bx |
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384 | mov %eax, %edi |
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385 | |||
386 | 8: |
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387 | |||
388 | mov %cr0, %eax |
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389 | or $1, %eax |
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390 | mov %eax, %cr0 |
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391 | |||
392 | jmp 9f |
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393 | 9: |
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394 | |||
395 | ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4) |
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396 | |||
397 | 0:# No prefered mode found |
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398 | mov $0x111, %cx |
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399 | push %di |
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400 | push %cx |
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401 | mov $VESA_GET_MODE_INFO, %ax |
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402 | int $0x10 |
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403 | |||
404 | pop %cx |
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405 | pop %di |
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406 | cmp $VESA_OK, %al |
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407 | jnz 1f |
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408 | jz 2b # Force relative jump |
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409 | |||
410 | 1: |
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411 | mov $0x0003, %ax |
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412 | int $0x10 |
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413 | mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA |
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414 | xor %ax, %ax |
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415 | jz 8b # Force relative jump |
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416 | |||
417 | |||
418 | .code32 |
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419 | vesa_init_protect: |
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420 | popl %esp |
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421 | |||
422 | movw $KDATA, %cx |
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423 | movw %cx, %es |
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424 | movw %cx, %fs |
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425 | movw %cx, %gs |
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426 | movw %cx, %ds # kernel data + stack |
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427 | movw %cx, %ss |
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428 | |||
429 | jmpl $KTEXT, $vesa_meeting_point |
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430 | |||
431 | .align 4 |
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432 | e_vesa_init: |
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433 | #endif |
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434 | |||
435 | .section K_DATA_START, "aw", @progbits |
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436 | |||
437 | .align 4096 |
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438 | page_directory: |
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439 | .space 4096, 0 |