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Rev 3802 Rev 3984
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
	
106
 
107
	movl grub_eax, %eax
107
	movl grub_eax, %eax
108
	movl grub_ebx, %ebx
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	movl grub_ebx, %ebx
109
	cmpl $MULTIBOOT_LOADER_MAGIC, %eax				# compare GRUB signature
109
	cmpl $MULTIBOOT_LOADER_MAGIC, %eax				# compare GRUB signature
110
	je valid_boot
110
	je valid_boot
111
		
111
 
112
		xorl %ecx, %ecx							# no memory map available
112
		xorl %ecx, %ecx							# no memory map available
113
		movl %ecx, e820counter
113
		movl %ecx, e820counter
114
		
114
 
115
		jmp invalid_boot
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		jmp invalid_boot
116
		
116
 
117
	valid_boot:
117
	valid_boot:
118
		
-
 
119
		movl (%ebx), %eax						# ebx = physical address of struct multiboot_info
-
 
120
		
-
 
121
		bt $3, %eax								# mbi->flags[3] (mods_count, mods_addr valid)
-
 
122
		jc mods_valid
-
 
123
			
-
 
124
			xorl %ecx, %ecx
-
 
125
			movl %ecx, init
-
 
126
			jmp mods_end
-
 
127
		
-
 
128
		mods_valid:
-
 
129
		
-
 
130
		movl 20(%ebx), %ecx						# mbi->mods_count
-
 
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		movl %ecx, init
-
 
132
		
-
 
133
		cmpl $0, %ecx
-
 
134
		je mods_end
-
 
135
		
-
 
136
		movl 24(%ebx), %esi						# mbi->mods_addr
-
 
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		movl $init, %edi
-
 
138
		
-
 
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		mods_loop:
-
 
140
		
-
 
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			movl 0(%esi), %edx					# mods->mod_start
-
 
142
			addl $0x80000000, %edx
-
 
143
			movl %edx, 4(%edi)
-
 
144
			
-
 
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			movl 4(%esi), %edx
-
 
146
			subl 0(%esi), %edx					# mods->mod_end - mods->mod_start
-
 
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			movl %edx, 8(%edi)
-
 
148
			
-
 
149
			addl $16, %esi
-
 
150
			addl $8	, %edi
-
 
151
			
-
 
152
			loop mods_loop
-
 
153
			
-
 
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		mods_end:
-
 
155
		
-
 
156
		bt $6, %eax								# mbi->flags[6] (mmap_length, mmap_addr valid)	
-
 
157
		jc mmap_valid
-
 
158
			
-
 
159
			xorl %edx, %edx
-
 
160
			jmp mmap_invalid
-
 
161
			
-
 
162
		mmap_valid:
-
 
163
		movl 44(%ebx), %ecx						# mbi->mmap_length
-
 
164
		movl 48(%ebx), %esi						# mbi->mmap_addr
-
 
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		movl $e820table, %edi
-
 
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		xorl %edx, %edx
-
 
167
		
-
 
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		mmap_loop:
-
 
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			cmpl $0, %ecx
-
 
170
			jle mmap_end
-
 
171
			
-
 
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			movl 4(%esi), %eax					# mmap->base_addr_low
-
 
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			movl %eax, (%edi)
-
 
174
			
-
 
175
			movl 8(%esi), %eax					# mmap->base_addr_high
-
 
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			movl %eax, 4(%edi)
-
 
177
			
-
 
178
			movl 12(%esi), %eax					# mmap->length_low
-
 
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			movl %eax, 8(%edi)
-
 
180
			
-
 
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			movl 16(%esi), %eax					# mmap->length_high
-
 
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			movl %eax, 12(%edi)
-
 
183
			
-
 
184
			movl 20(%esi), %eax					# mmap->type
-
 
185
			movl %eax, 16(%edi)
-
 
186
			
-
 
187
			movl (%esi), %eax					# mmap->size
-
 
188
			addl $0x4, %eax
-
 
189
			addl %eax, %esi
-
 
190
			subl %eax, %ecx
-
 
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
-
 
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
 
118
 
-
 
119
	movl grub_eax, %eax
-
 
120
	movl grub_ebx, %ebx
-
 
121
 
-
 
122
	# ia32_boot(grub_eax, grub_ebx)
-
 
123
	pushl %ebx
-
 
124
	pushl %eax
213
	call main_bsp								# never returns
125
	call ia32_cboot		# Does not return.
-
 
126
 
-
 
127
	# Not reached.
-
 
128
 
-
 
129
	invalid_boot:
214
 
130
 
215
	cli
131
	cli
216
	hlt
132
	hlt
217
 
133
 
218
.global map_kernel
134
.global map_kernel