Subversion Repositories HelenOS

Rev

Rev 1809 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 1809 Rev 1810
Line 37... Line 37...
37 
	.ascii  "HYPERCALL_PAGE=0x2,"
 37 
	.ascii  "HYPERCALL_PAGE=0x2,"
38 
	.ascii  "LOADER=generic,"
 38 
	.ascii  "LOADER=generic,"
39 
	.ascii  "PT_MODE_WRITABLE"
 39 
	.ascii  "PT_MODE_WRITABLE"
40 
	.byte   0
 40 
	.byte   0
41 
 
 41 
 
42 
.section K_TEXT_START, "ax"
 - 
 
43 
 
 - 
 
44 
KTEXT=8
 42 
.text
45 
KDATA=16
 - 
 
46 
 
 43 
 
47 
.code32
 44 
.code32
48 
.align 4
 45 
.align 4
49 
.global kernel_image_start
 46 
.global kernel_image_start
50
47
51 
kernel_image_start:
 48 
kernel_image_start:
52 
	lgdt KA2PA(bootstrap_gdtr)		# initialize Global Descriptor Table register
 - 
 
53 
 
 - 
 
54 
	movw $KDATA, %cx
 - 
 
55 
	movw %cx, %es
 - 
 
56 
	movw %cx, %fs
 - 
 
57 
	movw %cx, %gs
 - 
 
58 
	movw %cx, %ds					# kernel data + stack
 - 
 
59 
	movw %cx, %ss
 - 
 
60
- 
 
61 
	jmpl $KTEXT, $multiboot_meeting_point
 - 
 
62 
	multiboot_meeting_point:
 - 
 
63
- 
 
64 
	pushl %ebx							# save parameters from GRUB
 - 
 
65 
	pushl %eax
 - 
 
66
- 
 
67 
#ifdef CONFIG_FB
 - 
 
68 
	mov $vesa_init, %esi
 - 
 
69 
	mov $VESA_INIT_SEGMENT << 4, %edi
 - 
 
70 
	mov $e_vesa_init - vesa_init, %ecx
 - 
 
71 
	cld
 49 
	cld
72 
	rep movsb
 - 
 
73 
 
 - 
 
74 
	mov $VESA_INIT_SEGMENT << 4, %edi
 - 
 
75 
	jmpl %edi
 - 
 
76
- 
 
77 
	vesa_meeting_point:
 - 
 
78
- 
 
79 
	mov %esi, KA2PA(vesa_ph_addr)
 - 
 
80 
	mov %di, KA2PA(vesa_height)
 - 
 
81 
	shr $16, %edi
 - 
 
82 
	mov %di, KA2PA(vesa_width)
 - 
 
83 
	mov %bx, KA2PA(vesa_scanline)
 - 
 
84 
	shr $16, %ebx
 - 
 
85 
	mov %bx, KA2PA(vesa_bpp)
 - 
 
86 
#endif
- 
 
87
- 
 
88 
	call map_kernel							# map kernel and turn paging on
 50 
	movl $kernel_stack, %esp         # initialize stack pointer
89
- 
 
90 
	popl %eax
 - 
 
91 
	popl %ebx
 - 
 
92
51
93 
	call main_bsp								# never returns
 52 
	call main_bsp								# never returns
94 
 
 53 
 
95 
	cli
 54 
	cli
96 
	hlt
 55 
	hlt
97 
 
 56 
 
98 
.global map_kernel
 - 
 
99 
map_kernel:
 - 
 
100 
	#
 - 
 
101 
	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
 - 
 
102 
	# For simplicity, we map the entire 4G space.
 - 
 
103 
	#
 - 
 
104 
	movl %cr4, %ecx
 - 
 
105 
	orl $(1<<4), %ecx
 - 
 
106 
	movl %ecx, %cr4							# turn PSE on
 - 
 
107
- 
 
108 
	movl $(page_directory+0), %esi
 - 
 
109 
	movl $(page_directory+2048), %edi
 - 
 
110 
	xorl %ecx, %ecx
 - 
 
111 
	xorl %ebx, %ebx
 - 
 
112 
0:
 - 
 
113 
	movl $((1<<7)|(1<<0)), %eax
 - 
 
114 
	orl %ebx, %eax
 - 
 
115 
	movl %eax, (%esi,%ecx,4)					# mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M
 - 
 
116 
	movl %eax, (%edi,%ecx,4)					# mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M
 - 
 
117 
	addl $(4*1024*1024), %ebx
 - 
 
118 
 
 - 
 
119 
	incl %ecx
 - 
 
120 
	cmpl $512, %ecx
 - 
 
121 
	jl 0b
 - 
 
122 
 
 - 
 
123 
	movl %esi, %cr3
 - 
 
124
- 
 
125 
	# turn paging on
 - 
 
126 
	movl %cr0, %ebx
 - 
 
127 
	orl $(1<<31), %ebx
 - 
 
128 
	movl %ebx, %cr0
 - 
 
129 
	ret
 57 
.data
130 
 
 - 
 
131 
#ifdef CONFIG_FB
 - 
 
132 
vesa_init:
 - 
 
133 
	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
 - 
 
134
- 
 
135 
.code16
 - 
 
136 
vesa_init_real:
 - 
 
137
- 
 
138 
	mov %cr0, %eax
 - 
 
139 
	and $~1, %eax
 - 
 
140 
	mov %eax, %cr0
 - 
 
141
- 
 
142 
	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
 - 
 
143
- 
 
144 
vesa_init_real2:
 - 
 
145
- 
 
146 
	mov $VESA_INIT_SEGMENT, %bx
 - 
 
147
- 
 
148 
	mov %bx, %es
 - 
 
149 
	mov %bx, %fs
 - 
 
150 
	mov %bx, %gs
 - 
 
151 
	mov %bx, %ds
 - 
 
152 
	mov %bx, %ss
 - 
 
153
- 
 
154 
	movl %esp, %eax
 - 
 
155 
	movl $0x0000fffc, %esp
 - 
 
156 
	movl $0x0000fffc, %ebp
 - 
 
157 
	pushl %eax
 - 
 
158
- 
 
159 
#define VESA_INFO_SIZE 1024
 - 
 
160 
 
 - 
 
161 
#define VESA_MODE_LIST_PTR_OFFSET 14
 - 
 
162 
#define VESA_MODE_WIDTH_OFFSET 18
 - 
 
163 
#define VESA_MODE_HEIGHT_OFFSET 20
 - 
 
164 
#define VESA_MODE_BPP_OFFSET 25
 - 
 
165 
#define VESA_MODE_SCANLINE_OFFSET 16
 - 
 
166 
#define VESA_MODE_PHADDR_OFFSET 40
 - 
 
167 
 
 - 
 
168 
#define VESA_END_OF_MODES 0xffff
 - 
 
169 
 
 - 
 
170 
#define VESA_OK 0x4f
 - 
 
171 
 
 - 
 
172 
#define VESA_GET_INFO 0x4f00
 - 
 
173 
#define VESA_GET_MODE_INFO 0x4f01
 - 
 
174 
#define VESA_SET_MODE 0x4f02
 - 
 
175 
 
 - 
 
176 
#define CONFIG_VESA_BPP_a 255
 - 
 
177 
 
 - 
 
178 
#if CONFIG_VESA_BPP == 24
 - 
 
179 
#undef CONFIG_VESA_BPP_a
 - 
 
180 
#define CONFIG_VESA_BPP_a 32
 - 
 
181 
#endif
 - 
 
182 
 
 - 
 
183 
	mov $VESA_GET_INFO, %ax
 - 
 
184 
	mov $e_vesa_init - vesa_init, %di
 - 
 
185 
	push %di
 - 
 
186 
	int $0x10
 - 
 
187
- 
 
188 
	pop %di
 - 
 
189 
	cmp $VESA_OK, %al
 - 
 
190 
	jnz 0f
 - 
 
191
- 
 
192 
	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
 - 
 
193 
	mov %si, %gs
 - 
 
194 
	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
 - 
 
195
- 
 
196 
	add $VESA_INFO_SIZE, %di
 - 
 
197 
 
 - 
 
198 
1:# Try next mode
 - 
 
199 
	mov %gs:(%si), %cx
 - 
 
200 
	cmp $VESA_END_OF_MODES, %cx
 - 
 
201 
	jz 0f
 - 
 
202
- 
 
203 
	inc %si
 - 
 
204 
	inc %si
 - 
 
205 
	push %cx
 - 
 
206 
	push %di
 - 
 
207 
	push %si
 - 
 
208 
	mov $VESA_GET_MODE_INFO, %ax
 - 
 
209 
	int $0x10
 - 
 
210
- 
 
211 
	pop %si
 - 
 
212 
	pop %di
 - 
 
213 
	pop %cx
 - 
 
214 
	cmp $VESA_OK, %al
 - 
 
215 
	jnz 0f
 - 
 
216
- 
 
217 
	mov $CONFIG_VESA_WIDTH, %ax
 - 
 
218 
	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
 - 
 
219 
	jnz 1b
 - 
 
220
- 
 
221 
	mov $CONFIG_VESA_HEIGHT,%ax
 - 
 
222 
	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
 - 
 
223 
	jnz 1b
 - 
 
224
- 
 
225 
	mov $CONFIG_VESA_BPP, %al
 - 
 
226 
	cmp VESA_MODE_BPP_OFFSET(%di), %al
 - 
 
227 
	jz 2f
 - 
 
228
- 
 
229 
	mov $CONFIG_VESA_BPP_a, %al
 - 
 
230 
	cmp VESA_MODE_BPP_OFFSET(%di), %al
 - 
 
231 
	jnz 1b
 - 
 
232
- 
 
233 
2:
 - 
 
234
- 
 
235 
	mov %cx, %bx
 - 
 
236 
	or $0xc000, %bx
 - 
 
237 
	push %di
 - 
 
238 
	mov $VESA_SET_MODE, %ax
 - 
 
239 
	int $0x10
 - 
 
240
- 
 
241 
	pop %di
 - 
 
242 
	cmp $VESA_OK, %al
 - 
 
243 
	jnz 0f
 - 
 
244
- 
 
245 
	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
 - 
 
246 
	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
 - 
 
247 
	shl $16, %eax
 - 
 
248 
	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
 - 
 
249 
	mov VESA_MODE_BPP_OFFSET(%di), %bl
 - 
 
250 
	xor %bh, %bh
 - 
 
251 
	shl $16, %ebx
 - 
 
252 
	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
 - 
 
253 
	mov %eax, %edi
 - 
 
254
- 
 
255 
8:
- 
 
256
- 
 
257 
	mov %cr0, %eax
 - 
 
258 
	or $1, %eax
 - 
 
259 
	mov %eax, %cr0
 - 
 
260
- 
 
261 
	jmp 9f
 - 
 
262 
9:
 - 
 
263
- 
 
264 
	ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
 - 
 
265 
 
 - 
 
266 
0:# No prefered mode found
 - 
 
267 
	mov $0x111, %cx
 - 
 
268 
	push %di
 - 
 
269 
	push %cx
 - 
 
270 
	mov $VESA_GET_MODE_INFO, %ax
 - 
 
271 
	int $0x10
 - 
 
272
- 
 
273 
	pop %cx
 - 
 
274 
	pop %di
 - 
 
275 
	cmp $VESA_OK, %al
 - 
 
276 
	jnz 1f
 - 
 
277 
	jz 2b						# Force relative jump
 - 
 
278
- 
 
279 
1:
 - 
 
280 
	mov $0x0003, %ax
 - 
 
281 
	int $0x10
 - 
 
282 
	mov $0xffffffff, %edi		# EGA text mode used, because of problems with VESA
 - 
 
283 
	xor %ax, %ax
 - 
 
284 
	jz 8b						# Force relative jump
 - 
 
285
- 
 
286 
 
 - 
 
287 
.code32
 - 
 
288 
vesa_init_protect:
 - 
 
289 
	popl %esp
 - 
 
290 
 
 - 
 
291 
	movw $KDATA, %cx
 - 
 
292 
	movw %cx, %es
 - 
 
293 
	movw %cx, %fs
 - 
 
294 
	movw %cx, %gs
 - 
 
295 
	movw %cx, %ds					# kernel data + stack
 - 
 
296 
	movw %cx, %ss
 - 
 
297
- 
 
298 
	jmpl $KTEXT, $vesa_meeting_point
 - 
 
299 
 
 - 
 
300 
.align 4
 - 
 
301 
e_vesa_init:
 - 
 
302 
#endif
- 
 
303 
 
 - 
 
304 
.section K_DATA_START, "aw", @progbits
 - 
 
305 
 
 58 
 
306 
.align 4096
 59 
.align 4096
307 
page_directory:
 60 
page_directory:
308 
	.space 4096, 0
 61 
	.space 4096, 0
- 
 
 62 
 
- 
 
 63 
kernel_stack_bottom:
- 
 
 64 
	.space TEMP_STACK_SIZE
- 
 
 65 
kernel_stack: