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Rev 4339 Rev 4344
Line 99... Line 99...
99 
	mov %di, KA2PA(vesa_width)
 99 
	mov %di, KA2PA(vesa_width)
100 
	mov %bx, KA2PA(vesa_scanline)
 100 
	mov %bx, KA2PA(vesa_scanline)
101 
	shr $16, %ebx
 101 
	shr $16, %ebx
102 
	mov %bx, KA2PA(vesa_bpp)
 102 
	mov %bx, KA2PA(vesa_bpp)
103 
#endif
103 
#endif
104
104 
 
105 
	call map_kernel							# map kernel and turn paging on
 105 
	call map_kernel							# map kernel and turn paging on
106
- 
 
107 
	movl grub_eax, %eax
 - 
 
108 
	movl grub_ebx, %ebx
 - 
 
109 
	cmpl $MULTIBOOT_LOADER_MAGIC, %eax				# compare GRUB signature
 - 
 
110 
	je valid_boot
 - 
 
111
- 
 
112 
		xorl %ecx, %ecx							# no memory map available
 - 
 
113 
		movl %ecx, e820counter
 - 
 
114
- 
 
115 
		jmp invalid_boot
 - 
 
116
- 
 
117 
	valid_boot:
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118
- 
 
119 
		movl (%ebx), %eax						# ebx = physical address of struct multiboot_info
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120
- 
 
121 
		bt $3, %eax								# mbi->flags[3] (mods_count, mods_addr valid)
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122 
		jc mods_valid
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123
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124 
			xorl %ecx, %ecx
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125 
			movl %ecx, init
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126 
			jmp mods_end
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127
- 
 
128 
		mods_valid:
 - 
 
129
- 
 
130 
		movl 20(%ebx), %ecx						# mbi->mods_count
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		movl %ecx, init
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132
- 
 
133 
		cmpl $0, %ecx
 - 
 
134 
		je mods_end
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135
- 
 
136 
		movl 24(%ebx), %esi						# mbi->mods_addr
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137 
		movl $init, %edi
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138
- 
 
139 
		mods_loop:
 - 
 
140
- 
 
141 
			movl 0(%esi), %edx					# mods->mod_start
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142 
			addl $0x80000000, %edx
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143 
			movl %edx, 4(%edi)
 - 
 
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- 
 
145 
			movl 4(%esi), %edx
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146 
			subl 0(%esi), %edx					# mods->mod_end - mods->mod_start
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			movl %edx, 8(%edi)
 - 
 
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- 
 
149 
			addl $16, %esi
 - 
 
150 
			addl $8	, %edi
 - 
 
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- 
 
152 
			loop mods_loop
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153
- 
 
154 
		mods_end:
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155
- 
 
156 
		bt $6, %eax								# mbi->flags[6] (mmap_length, mmap_addr valid)
- 
 
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		jc mmap_valid
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158
- 
 
159 
			xorl %edx, %edx
 - 
 
160 
			jmp mmap_invalid
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161
- 
 
162 
		mmap_valid:
 - 
 
163 
		movl 44(%ebx), %ecx						# mbi->mmap_length
 - 
 
164 
		movl 48(%ebx), %esi						# mbi->mmap_addr
 - 
 
165 
		movl $e820table, %edi
 - 
 
166 
		xorl %edx, %edx
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167
- 
 
168 
		mmap_loop:
 - 
 
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			cmpl $0, %ecx
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170 
			jle mmap_end
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171
- 
 
172 
			movl 4(%esi), %eax					# mmap->base_addr_low
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173 
			movl %eax, (%edi)
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174
- 
 
175 
			movl 8(%esi), %eax					# mmap->base_addr_high
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			movl %eax, 4(%edi)
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177
- 
 
178 
			movl 12(%esi), %eax					# mmap->length_low
 - 
 
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			movl %eax, 8(%edi)
 - 
 
180
- 
 
181 
			movl 16(%esi), %eax					# mmap->length_high
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			movl %eax, 12(%edi)
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183
- 
 
184 
			movl 20(%esi), %eax					# mmap->type
 - 
 
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			movl %eax, 16(%edi)
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186
- 
 
187 
			movl (%esi), %eax					# mmap->size
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188 
			addl $0x4, %eax
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			addl %eax, %esi
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190 
			subl %eax, %ecx
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191 
			addl $MEMMAP_E820_RECORD_SIZE, %edi
 - 
 
192 
			incl %edx
 - 
 
193 
			jmp mmap_loop
 - 
 
194
- 
 
195 
		mmap_end:
 - 
 
196
- 
 
197 
		mmap_invalid:
 - 
 
198 
		movl %edx, e820counter
 - 
 
199
- 
 
200 
	invalid_boot:
 - 
 
201
- 
 
202 
#ifdef CONFIG_SMP
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203
- 
 
204 
	# copy AP bootstrap routines below 1 MB
 - 
 
205
- 
 
206 
	movl $BOOT_OFFSET, %esi
 - 
 
207 
	movl $AP_BOOT_OFFSET, %edi
 - 
 
208 
	movl $_hardcoded_unmapped_size, %ecx
 - 
 
209 
	rep movsb
 - 
 
210
- 
 
211 
#endif
 - 
 
212 
 
 106 
 
- 
 
 107 
	# ia32_cboot(grub_eax, grub_ebx)
- 
 
 108 
	pushl grub_ebx
- 
 
 109 
	pushl grub_eax
213 
	call main_bsp								# never returns
 110 
	call ia32_cboot		# Does not return.
- 
 
 111 
 
- 
 
 112 
	# Not reached.
214 
 
 113 
 
215 
	cli
 114 
	cli
216 
	hlt
 115 
	hlt
217 
 
 116 
 
218 
.global map_kernel
 117 
.global map_kernel