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1 jermar 1
#
2071 jermar 2
# Copyright (c) 2001-2004 Jakub Jermar
3
# Copyright (c) 2005-2006 Martin Decky
1 jermar 4
# All rights reserved.
5
#
6
# Redistribution and use in source and binary forms, with or without
7
# modification, are permitted provided that the following conditions
8
# are met:
9
#
10
# - Redistributions of source code must retain the above copyright
11
#   notice, this list of conditions and the following disclaimer.
12
# - Redistributions in binary form must reproduce the above copyright
13
#   notice, this list of conditions and the following disclaimer in the
14
#   documentation and/or other materials provided with the distribution.
15
# - The name of the author may not be used to endorse or promote products
16
#   derived from this software without specific prior written permission.
17
#
18
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
#
29
 
222 decky 30
#include <arch/boot/boot.h>
506 decky 31
#include <arch/boot/memmap.h>
300 palkovsky 32
#include <arch/mm/page.h>
33
#include <arch/pm.h>
222 decky 34
 
693 decky 35
#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
36
 
406 jermar 37
.section K_TEXT_START, "ax"
1 jermar 38
 
112 jermar 39
.code32
222 decky 40
.align 4
693 decky 41
.global multiboot_image_start
222 decky 42
multiboot_header:
43
	.long MULTIBOOT_HEADER_MAGIC
44
	.long MULTIBOOT_HEADER_FLAGS
45
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)	# checksum
693 decky 46
	.long multiboot_header
47
	.long unmapped_ktext_start
222 decky 48
	.long 0
49
	.long 0
693 decky 50
	.long multiboot_image_start
222 decky 51
 
52
multiboot_image_start:
2784 jermar 53
	cld
693 decky 54
	movl $START_STACK, %esp			# initialize stack pointer
55
	lgdt KA2PA(bootstrap_gdtr)		# initialize Global Descriptor Table register
112 jermar 56
 
1811 decky 57
	movw $selector(KDATA_DES), %cx
280 decky 58
	movw %cx, %es
1639 decky 59
	movw %cx, %fs
280 decky 60
	movw %cx, %gs
693 decky 61
	movw %cx, %ds					# kernel data + stack
280 decky 62
	movw %cx, %ss
235 decky 63
 
1811 decky 64
	jmpl $selector(KTEXT_DES), $multiboot_meeting_point
271 decky 65
	multiboot_meeting_point:
66
 
2222 decky 67
	movl %eax, grub_eax					# save parameters from GRUB
68
	movl %ebx, grub_ebx
1639 decky 69
 
2220 decky 70
	xorl %eax, %eax  
71
 	cpuid
72
 	cmp $0x0, %eax						# any function > 0?
73
	jbe pse_unsupported
2221 decky 74
	movl $0x1, %eax						# Basic function code 1
2220 decky 75
	cpuid
76
	bt $3, %edx							# Test if PSE is supported
77
	jc pse_supported
78
 
79
	pse_unsupported:
80
		movl $pse_msg, %esi
81
		jmp error_halt
82
 
83
	pse_supported:
84
 
1287 vana 85
#ifdef CONFIG_FB
1639 decky 86
	mov $vesa_init, %esi
87
	mov $VESA_INIT_SEGMENT << 4, %edi
88
	mov $e_vesa_init - vesa_init, %ecx
89
	rep movsb
1287 vana 90
 
1639 decky 91
	mov $VESA_INIT_SEGMENT << 4, %edi
2089 decky 92
	jmpl *%edi
1639 decky 93
 
94
	vesa_meeting_point:
95
 
96
	mov %esi, KA2PA(vesa_ph_addr)
97
	mov %di, KA2PA(vesa_height)
98
	shr $16, %edi
99
	mov %di, KA2PA(vesa_width)
100
	mov %bx, KA2PA(vesa_scanline)
101
	shr $16, %ebx
102
	mov %bx, KA2PA(vesa_bpp)
1287 vana 103
#endif	
3984 svoboda 104
 
323 jermar 105
	call map_kernel							# map kernel and turn paging on
3984 svoboda 106
 
4015 decky 107
	# arch_pre_main(grub_eax, grub_ebx)
3985 svoboda 108
	pushl grub_ebx
109
	pushl grub_eax
4015 decky 110
	call arch_pre_main
111
 
112
	call main_bsp
113
 
3984 svoboda 114
	# Not reached.
4015 decky 115
 
110 jermar 116
	cli
117
	hlt
118
 
119
.global map_kernel
120
map_kernel:
105 jermar 121
	#
122
	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
371 jermar 123
	# For simplicity, we map the entire 4G space.
105 jermar 124
	#
125
	movl %cr4, %ecx
2220 decky 126
	orl $(1 << 4), %ecx							# turn PSE on
127
	andl $(~(1 << 5)), %ecx						# turn PAE off
128
	movl %ecx, %cr4
1 jermar 129
 
2220 decky 130
	movl $(page_directory + 0), %esi
131
	movl $(page_directory + 2048), %edi
371 jermar 132
	xorl %ecx, %ecx
133
	xorl %ebx, %ebx
134
0:
2220 decky 135
	movl $((1 << 7) | (1 << 1) | (1 << 0)), %eax
371 jermar 136
	orl %ebx, %eax
2220 decky 137
	movl %eax, (%esi, %ecx, 4)					# mapping 0x00000000 + %ecx * 4M => 0x00000000 + %ecx * 4M
138
	movl %eax, (%edi, %ecx, 4)					# mapping 0x80000000 + %ecx * 4M => 0x00000000 + %ecx * 4M
139
	addl $(4 * 1024 * 1024), %ebx
1 jermar 140
 
371 jermar 141
	incl %ecx
142
	cmpl $512, %ecx
143
	jl 0b
105 jermar 144
 
371 jermar 145
	movl %esi, %cr3
105 jermar 146
 
147
	movl %cr0, %ebx
2220 decky 148
	orl $(1 << 31), %ebx						# turn paging on
105 jermar 149
	movl %ebx, %cr0
110 jermar 150
	ret
105 jermar 151
 
2220 decky 152
# Print string from %esi to EGA display (in red) and halt
153
error_halt:
154
	movl $0xb8000, %edi						# base of EGA text mode memory
155
	xorl %eax, %eax
156
 
157
	movw $0x3d4, %dx						# read bits 8 - 15 of the cursor address
158
	movb $0xe, %al
159
	outb %al, %dx
160
 
161
	movw $0x3d5, %dx
162
	inb %dx, %al
163
	shl $8, %ax
164
 
165
	movw $0x3d4, %dx						# read bits 0 - 7 of the cursor address
166
	movb $0xf, %al
167
	outb %al, %dx
168
 
169
	movw $0x3d5, %dx
170
	inb %dx, %al
171
 
172
	cmp $1920, %ax
173
	jbe cursor_ok
174
		movw $1920, %ax						# sanity check for the cursor on the last line
175
	cursor_ok:
176
 
177
	movw %ax, %bx
178
	shl $1, %eax
179
	addl %eax, %edi
180
 
181
	movw $0x0c00, %ax						# black background, light red foreground
182
 
183
	ploop:
184
		lodsb
185
		cmp $0, %al
186
		je ploop_end
187
		stosw
188
		inc %bx	
189
		jmp ploop
190
	ploop_end:
191
 
192
	movw $0x3d4, %dx						# write bits 8 - 15 of the cursor address
193
	movb $0xe, %al
194
	outb %al, %dx
195
 
196
	movw $0x3d5, %dx
197
	movb %bh, %al
198
	outb %al, %dx
199
 
200
	movw $0x3d4, %dx						# write bits 0 - 7 of the cursor address
201
	movb $0xf, %al
202
	outb %al, %dx
203
 
204
	movw $0x3d5, %dx
205
	movb %bl, %al
206
	outb %al, %dx
207
 
208
	cli
209
	hlt
210
 
1287 vana 211
#ifdef CONFIG_FB
212
vesa_init:
1639 decky 213
	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
214
 
1287 vana 215
.code16
1639 decky 216
vesa_init_real:
1287 vana 217
 
1639 decky 218
	mov %cr0, %eax
219
	and $~1, %eax
220
	mov %eax, %cr0
221
 
222
	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
223
 
224
vesa_init_real2:
225
 
226
	mov $VESA_INIT_SEGMENT, %bx
227
 
228
	mov %bx, %es
229
	mov %bx, %fs
230
	mov %bx, %gs
231
	mov %bx, %ds
232
	mov %bx, %ss
233
 
234
	movl %esp, %eax
235
	movl $0x0000fffc, %esp
236
	movl $0x0000fffc, %ebp
237
	pushl %eax
238
 
1287 vana 239
#define VESA_INFO_SIZE 1024
240
 
2302 decky 241
#define VESA_MODE_ATTRIBUTES_OFFSET 0
1639 decky 242
#define VESA_MODE_LIST_PTR_OFFSET 14
2302 decky 243
#define VESA_MODE_SCANLINE_OFFSET 16
1287 vana 244
#define VESA_MODE_WIDTH_OFFSET 18
245
#define VESA_MODE_HEIGHT_OFFSET 20
246
#define VESA_MODE_BPP_OFFSET 25
247
#define VESA_MODE_PHADDR_OFFSET 40
248
 
1639 decky 249
#define VESA_END_OF_MODES 0xffff
1287 vana 250
 
1639 decky 251
#define VESA_OK 0x4f
1287 vana 252
 
1639 decky 253
#define VESA_GET_INFO 0x4f00
1287 vana 254
#define VESA_GET_MODE_INFO 0x4f01
255
#define VESA_SET_MODE 0x4f02
2302 decky 256
#define VESA_SET_PALETTE 0x4f09
1287 vana 257
 
1639 decky 258
#if CONFIG_VESA_BPP == 24
2302 decky 259
#define CONFIG_VESA_BPP_VARIANT 32
1287 vana 260
#endif
261
 
1639 decky 262
	mov $VESA_GET_INFO, %ax
263
	mov $e_vesa_init - vesa_init, %di
264
	push %di
265
	int $0x10
266
 
267
	pop %di
268
	cmp $VESA_OK, %al
269
	jnz 0f
270
 
271
	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
272
	mov %si, %gs
273
	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
274
 
275
	add $VESA_INFO_SIZE, %di
1287 vana 276
 
277
1:# Try next mode
1639 decky 278
	mov %gs:(%si), %cx
279
	cmp $VESA_END_OF_MODES, %cx
280
	jz 0f
281
 
282
	inc %si
283
	inc %si
284
	push %cx
285
	push %di
286
	push %si
287
	mov $VESA_GET_MODE_INFO, %ax
288
	int $0x10
289
 
290
	pop %si
291
	pop %di
292
	pop %cx
293
	cmp $VESA_OK, %al
294
	jnz 0f
295
 
296
	mov $CONFIG_VESA_WIDTH, %ax
297
	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
298
	jnz 1b
299
 
2302 decky 300
	mov $CONFIG_VESA_HEIGHT, %ax
1639 decky 301
	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
302
	jnz 1b
303
 
304
	mov $CONFIG_VESA_BPP, %al
305
	cmp VESA_MODE_BPP_OFFSET(%di), %al
2302 decky 306
 
307
#ifdef CONFIG_VESA_BPP_VARIANT
1639 decky 308
	jz 2f
309
 
2302 decky 310
	mov $CONFIG_VESA_BPP_VARIANT, %al
1639 decky 311
	cmp VESA_MODE_BPP_OFFSET(%di), %al
2302 decky 312
#endif
1639 decky 313
	jnz 1b
2302 decky 314
 
1287 vana 315
2:
316
 
1639 decky 317
	mov %cx, %bx
318
	or $0xc000, %bx
319
	push %di
320
	mov $VESA_SET_MODE, %ax
321
	int $0x10
1287 vana 322
 
1639 decky 323
	pop %di
324
	cmp $VESA_OK, %al
325
	jnz 0f
2302 decky 326
 
327
#if CONFIG_VESA_BPP == 8
1287 vana 328
 
2302 decky 329
	# Set 3:2:3 VGA palette
330
 
331
	mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax
332
	push %di
333
	mov $vga323 - vesa_init, %di
334
	mov $0x100, %ecx
335
 
336
	bt $5, %ax							# Test if VGA compatible registers are present
337
	jnc vga_compat
338
 
339
		# Try VESA routine to set palette
340
 
341
		mov $VESA_SET_PALETTE, %ax
342
		xor %bl, %bl
343
		xor %dx, %dx
344
		int $0x10
345
 
3802 decky 346
		cmp $0x00, %ah
347
		je vga_not_compat
2302 decky 348
 
349
	vga_compat:
350
 
351
		# Try VGA registers to set palette
352
 
353
		movw $0x3c6, %dx						# Set palette mask
354
		movb $0xff, %al
355
		outb %al, %dx
356
 
357
		movw $0x3c8, %dx						# First index to set
358
		xor %al, %al
359
		outb %al, %dx
360
 
361
		movw $0x3c9, %dx						# Data port
362
		vga_loop:
363
			movb %es:2(%di), %al
364
			outb %al, %dx
365
 
366
			movb %es:1(%di), %al
367
			outb %al, %dx
368
 
369
			movb %es:(%di), %al
370
			outb %al, %dx
371
 
372
			addw $4, %di
373
			loop vga_loop
374
 
375
	vga_not_compat:
376
 
377
	pop %di
378
 
379
#endif
380
 
1639 decky 381
	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
382
	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
383
	shl $16, %eax
384
	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
385
	mov VESA_MODE_BPP_OFFSET(%di), %bl
386
	xor %bh, %bh
387
	shl $16, %ebx
388
	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
389
	mov %eax, %edi
390
 
1287 vana 391
8:	
1639 decky 392
 
393
	mov %cr0, %eax
394
	or $1, %eax
1641 decky 395
	mov %eax, %cr0
1639 decky 396
 
397
	jmp 9f
1287 vana 398
9:
1639 decky 399
 
1811 decky 400
	ljmpl $selector(KTEXT_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
1287 vana 401
 
1639 decky 402
0:# No prefered mode found
403
	mov $0x111, %cx
404
	push %di
405
	push %cx
406
	mov $VESA_GET_MODE_INFO, %ax
407
	int $0x10
408
 
409
	pop %cx
410
	pop %di
411
	cmp $VESA_OK, %al
412
	jnz 1f
413
	jz 2b						# Force relative jump
414
 
415
1:
416
	mov $0x0003, %ax
417
	int $0x10
418
	mov $0xffffffff, %edi		# EGA text mode used, because of problems with VESA
419
	xor %ax, %ax
420
	jz 8b						# Force relative jump
1287 vana 421
 
2302 decky 422
vga323:
423
#include "vga323.pal"
424
 
1639 decky 425
.code32
426
vesa_init_protect:
1811 decky 427
	movw $selector(KDATA_DES), %cx
1639 decky 428
	movw %cx, %es
429
	movw %cx, %fs
430
	movw %cx, %gs
431
	movw %cx, %ds					# kernel data + stack
432
	movw %cx, %ss
433
 
2222 decky 434
	movl $START_STACK, %esp			# initialize stack pointer
435
 
1811 decky 436
	jmpl $selector(KTEXT_DES), $vesa_meeting_point
1287 vana 437
 
438
.align 4
439
e_vesa_init:
440
#endif	
441
 
406 jermar 442
.section K_DATA_START, "aw", @progbits
105 jermar 443
 
444
.align 4096
445
page_directory:
446
	.space 4096, 0
2220 decky 447
 
2222 decky 448
grub_eax:
449
	.long 0
450
 
451
grub_ebx:
452
	.long 0
453
 
2220 decky 454
pse_msg:
2302 decky 455
	.asciz "Page Size Extension not supported. System halted."