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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
 108 
	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
 115 
		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
 - 
 
131 
		movl %ecx, init
 - 
 
132
- 
 
133 
		cmpl $0, %ecx
 - 
 
134 
		je mods_end
 - 
 
135
- 
 
136 
		movl 24(%ebx), %esi						# mbi->mods_addr
 - 
 
137 
		movl $init, %edi
 - 
 
138
- 
 
139 
		mods_loop:
 - 
 
140
- 
 
141 
			movl 0(%esi), %edx					# mods->mod_start
 - 
 
142 
			addl $0x80000000, %edx
 - 
 
143 
			movl %edx, 4(%edi)
 - 
 
144
- 
 
145 
			movl 4(%esi), %edx
 - 
 
146 
			subl 0(%esi), %edx					# mods->mod_end - mods->mod_start
 - 
 
147 
			movl %edx, 8(%edi)
 - 
 
148
- 
 
149 
			addl $16, %esi
 - 
 
150 
			addl $8	, %edi
 - 
 
151
- 
 
152 
			loop mods_loop
 - 
 
153
- 
 
154 
		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
 - 
 
165 
		movl $e820table, %edi
 - 
 
166 
		xorl %edx, %edx
 - 
 
167
- 
 
168 
		mmap_loop:
 - 
 
169 
			cmpl $0, %ecx
 - 
 
170 
			jle mmap_end
 - 
 
171
- 
 
172 
			movl 4(%esi), %eax					# mmap->base_addr_low
 - 
 
173 
			movl %eax, (%edi)
 - 
 
174
- 
 
175 
			movl 8(%esi), %eax					# mmap->base_addr_high
 - 
 
176 
			movl %eax, 4(%edi)
 - 
 
177
- 
 
178 
			movl 12(%esi), %eax					# mmap->length_low
 - 
 
179 
			movl %eax, 8(%edi)
 - 
 
180
- 
 
181 
			movl 16(%esi), %eax					# mmap->length_high
 - 
 
182 
			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