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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/mm/page.h> |
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32 | #include <arch/pm.h> |
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33 | |||
34 | .section __xen_guest |
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35 | .ascii "GUEST_OS=HelenOS," |
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36 | .ascii "XEN_VER=xen-3.0," |
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37 | .ascii "HYPERCALL_PAGE=0x2," |
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38 | .ascii "LOADER=generic," |
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39 | .ascii "PT_MODE_WRITABLE" |
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40 | .byte 0 |
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41 | |||
42 | .section K_TEXT_START, "ax" |
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43 | |||
44 | KTEXT=8 |
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45 | KDATA=16 |
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46 | |||
47 | .code32 |
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48 | .align 4 |
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1809 | decky | 49 | .global kernel_image_start |
1805 | decky | 50 | |
1809 | decky | 51 | kernel_image_start: |
1805 | decky | 52 | lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register |
53 | |||
54 | movw $KDATA, %cx |
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55 | movw %cx, %es |
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56 | movw %cx, %fs |
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57 | movw %cx, %gs |
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58 | movw %cx, %ds # kernel data + stack |
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59 | movw %cx, %ss |
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60 | |||
61 | jmpl $KTEXT, $multiboot_meeting_point |
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62 | multiboot_meeting_point: |
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63 | |||
64 | pushl %ebx # save parameters from GRUB |
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65 | pushl %eax |
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66 | |||
67 | #ifdef CONFIG_FB |
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68 | mov $vesa_init, %esi |
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69 | mov $VESA_INIT_SEGMENT << 4, %edi |
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70 | mov $e_vesa_init - vesa_init, %ecx |
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71 | cld |
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72 | rep movsb |
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73 | |||
74 | mov $VESA_INIT_SEGMENT << 4, %edi |
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75 | jmpl %edi |
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76 | |||
77 | vesa_meeting_point: |
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78 | |||
79 | mov %esi, KA2PA(vesa_ph_addr) |
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80 | mov %di, KA2PA(vesa_height) |
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81 | shr $16, %edi |
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82 | mov %di, KA2PA(vesa_width) |
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83 | mov %bx, KA2PA(vesa_scanline) |
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84 | shr $16, %ebx |
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85 | mov %bx, KA2PA(vesa_bpp) |
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86 | #endif |
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87 | |||
88 | call map_kernel # map kernel and turn paging on |
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89 | |||
90 | popl %eax |
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91 | popl %ebx |
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92 | |||
93 | call main_bsp # never returns |
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94 | |||
95 | cli |
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96 | hlt |
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97 | |||
98 | .global map_kernel |
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99 | map_kernel: |
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100 | # |
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101 | # Here we setup mapping for both the unmapped and mapped sections of the kernel. |
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102 | # For simplicity, we map the entire 4G space. |
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103 | # |
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104 | movl %cr4, %ecx |
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105 | orl $(1<<4), %ecx |
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106 | movl %ecx, %cr4 # turn PSE on |
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107 | |||
108 | movl $(page_directory+0), %esi |
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109 | movl $(page_directory+2048), %edi |
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110 | xorl %ecx, %ecx |
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111 | xorl %ebx, %ebx |
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112 | 0: |
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113 | movl $((1<<7)|(1<<0)), %eax |
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114 | orl %ebx, %eax |
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115 | movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M |
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116 | movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M |
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117 | addl $(4*1024*1024), %ebx |
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118 | |||
119 | incl %ecx |
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120 | cmpl $512, %ecx |
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121 | jl 0b |
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122 | |||
123 | movl %esi, %cr3 |
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124 | |||
125 | # turn paging on |
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126 | movl %cr0, %ebx |
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127 | orl $(1<<31), %ebx |
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128 | movl %ebx, %cr0 |
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129 | ret |
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130 | |||
131 | #ifdef CONFIG_FB |
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132 | vesa_init: |
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133 | jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init |
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134 | |||
135 | .code16 |
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136 | vesa_init_real: |
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137 | |||
138 | mov %cr0, %eax |
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139 | and $~1, %eax |
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140 | mov %eax, %cr0 |
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141 | |||
142 | jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init |
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143 | |||
144 | vesa_init_real2: |
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145 | |||
146 | mov $VESA_INIT_SEGMENT, %bx |
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147 | |||
148 | mov %bx, %es |
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149 | mov %bx, %fs |
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150 | mov %bx, %gs |
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151 | mov %bx, %ds |
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152 | mov %bx, %ss |
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153 | |||
154 | movl %esp, %eax |
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155 | movl $0x0000fffc, %esp |
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156 | movl $0x0000fffc, %ebp |
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157 | pushl %eax |
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158 | |||
159 | #define VESA_INFO_SIZE 1024 |
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160 | |||
161 | #define VESA_MODE_LIST_PTR_OFFSET 14 |
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162 | #define VESA_MODE_WIDTH_OFFSET 18 |
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163 | #define VESA_MODE_HEIGHT_OFFSET 20 |
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164 | #define VESA_MODE_BPP_OFFSET 25 |
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165 | #define VESA_MODE_SCANLINE_OFFSET 16 |
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166 | #define VESA_MODE_PHADDR_OFFSET 40 |
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167 | |||
168 | #define VESA_END_OF_MODES 0xffff |
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169 | |||
170 | #define VESA_OK 0x4f |
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171 | |||
172 | #define VESA_GET_INFO 0x4f00 |
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173 | #define VESA_GET_MODE_INFO 0x4f01 |
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174 | #define VESA_SET_MODE 0x4f02 |
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175 | |||
176 | #define CONFIG_VESA_BPP_a 255 |
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177 | |||
178 | #if CONFIG_VESA_BPP == 24 |
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179 | #undef CONFIG_VESA_BPP_a |
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180 | #define CONFIG_VESA_BPP_a 32 |
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181 | #endif |
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182 | |||
183 | mov $VESA_GET_INFO, %ax |
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184 | mov $e_vesa_init - vesa_init, %di |
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185 | push %di |
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186 | int $0x10 |
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187 | |||
188 | pop %di |
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189 | cmp $VESA_OK, %al |
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190 | jnz 0f |
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191 | |||
192 | mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si |
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193 | mov %si, %gs |
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194 | mov VESA_MODE_LIST_PTR_OFFSET(%di), %si |
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195 | |||
196 | add $VESA_INFO_SIZE, %di |
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197 | |||
198 | 1:# Try next mode |
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199 | mov %gs:(%si), %cx |
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200 | cmp $VESA_END_OF_MODES, %cx |
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201 | jz 0f |
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202 | |||
203 | inc %si |
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204 | inc %si |
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205 | push %cx |
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206 | push %di |
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207 | push %si |
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208 | mov $VESA_GET_MODE_INFO, %ax |
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209 | int $0x10 |
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210 | |||
211 | pop %si |
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212 | pop %di |
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213 | pop %cx |
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214 | cmp $VESA_OK, %al |
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215 | jnz 0f |
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216 | |||
217 | mov $CONFIG_VESA_WIDTH, %ax |
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218 | cmp VESA_MODE_WIDTH_OFFSET(%di), %ax |
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219 | jnz 1b |
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220 | |||
221 | mov $CONFIG_VESA_HEIGHT,%ax |
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222 | cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax |
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223 | jnz 1b |
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224 | |||
225 | mov $CONFIG_VESA_BPP, %al |
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226 | cmp VESA_MODE_BPP_OFFSET(%di), %al |
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227 | jz 2f |
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228 | |||
229 | mov $CONFIG_VESA_BPP_a, %al |
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230 | cmp VESA_MODE_BPP_OFFSET(%di), %al |
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231 | jnz 1b |
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232 | |||
233 | 2: |
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234 | |||
235 | mov %cx, %bx |
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236 | or $0xc000, %bx |
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237 | push %di |
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238 | mov $VESA_SET_MODE, %ax |
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239 | int $0x10 |
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240 | |||
241 | pop %di |
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242 | cmp $VESA_OK, %al |
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243 | jnz 0f |
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244 | |||
245 | mov VESA_MODE_PHADDR_OFFSET(%di), %esi |
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246 | mov VESA_MODE_WIDTH_OFFSET(%di), %ax |
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247 | shl $16, %eax |
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248 | mov VESA_MODE_HEIGHT_OFFSET(%di), %ax |
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249 | mov VESA_MODE_BPP_OFFSET(%di), %bl |
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250 | xor %bh, %bh |
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251 | shl $16, %ebx |
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252 | mov VESA_MODE_SCANLINE_OFFSET(%di), %bx |
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253 | mov %eax, %edi |
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254 | |||
255 | 8: |
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256 | |||
257 | mov %cr0, %eax |
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258 | or $1, %eax |
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259 | mov %eax, %cr0 |
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260 | |||
261 | jmp 9f |
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262 | 9: |
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263 | |||
264 | ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4) |
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265 | |||
266 | 0:# No prefered mode found |
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267 | mov $0x111, %cx |
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268 | push %di |
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269 | push %cx |
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270 | mov $VESA_GET_MODE_INFO, %ax |
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271 | int $0x10 |
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272 | |||
273 | pop %cx |
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274 | pop %di |
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275 | cmp $VESA_OK, %al |
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276 | jnz 1f |
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277 | jz 2b # Force relative jump |
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278 | |||
279 | 1: |
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280 | mov $0x0003, %ax |
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281 | int $0x10 |
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282 | mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA |
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283 | xor %ax, %ax |
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284 | jz 8b # Force relative jump |
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285 | |||
286 | |||
287 | .code32 |
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288 | vesa_init_protect: |
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289 | popl %esp |
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290 | |||
291 | movw $KDATA, %cx |
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292 | movw %cx, %es |
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293 | movw %cx, %fs |
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294 | movw %cx, %gs |
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295 | movw %cx, %ds # kernel data + stack |
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296 | movw %cx, %ss |
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297 | |||
298 | jmpl $KTEXT, $vesa_meeting_point |
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299 | |||
300 | .align 4 |
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301 | e_vesa_init: |
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302 | #endif |
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303 | |||
304 | .section K_DATA_START, "aw", @progbits |
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305 | |||
306 | .align 4096 |
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307 | page_directory: |
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308 | .space 4096, 0 |