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164 palkovsky 1
#
2071 jermar 2
# Copyright (c) 2005 Ondrej Palkovsky
3
# Copyright (c) 2006 Martin Decky
164 palkovsky 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
 
695 decky 30
#include <arch/boot/boot.h>
31
#include <arch/boot/memmap.h>
194 palkovsky 32
#include <arch/mm/page.h>	
188 palkovsky 33
#include <arch/mm/ptl.h>
194 palkovsky 34
#include <arch/pm.h>
251 palkovsky 35
#include <arch/cpu.h>
275 palkovsky 36
#include <arch/cpuid.h>
164 palkovsky 37
 
694 decky 38
#define START_STACK	(BOOT_OFFSET - BOOT_STACK_SIZE)
275 palkovsky 39
 
406 jermar 40
.section K_TEXT_START, "ax"
695 decky 41
 
680 decky 42
.code32
43
.align 4
695 decky 44
.global multiboot_image_start
680 decky 45
multiboot_header:
46
	.long MULTIBOOT_HEADER_MAGIC
47
	.long MULTIBOOT_HEADER_FLAGS
48
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)	# checksum
694 decky 49
	.long multiboot_header
50
	.long unmapped_ktext_start
680 decky 51
	.long 0
52
	.long 0
694 decky 53
	.long multiboot_image_start
188 palkovsky 54
 
680 decky 55
multiboot_image_start:
695 decky 56
	movl $START_STACK, %esp			# initialize stack pointer
57
	lgdt bootstrap_gdtr				# initialize Global Descriptor Table register
680 decky 58
 
685 decky 59
	movw $gdtselector(KDATA_DES), %cx
60
	movw %cx, %es
61
	movw %cx, %ds							# kernel data + stack
62
	movw %cx, %ss
807 palkovsky 63
	# Simics seems to remove hidden part of GS on entering user mode
64
	#  when _visible_ part of GS does not point to user-mode segment
65
	movw $gdtselector(UDATA_DES), %cx
66
	movw %cx, %fs
67
	movw %cx, %gs
685 decky 68
 
695 decky 69
	jmpl $gdtselector(KTEXT32_DES), $multiboot_meeting_point
685 decky 70
	multiboot_meeting_point:
71
 
695 decky 72
	movl %eax, grub_eax							# save parameters from GRUB
73
	movl %ebx, grub_ebx
74
 
1289 vana 75
#ifdef CONFIG_FB
1641 decky 76
	mov $vesa_init, %esi;
77
	mov $VESA_INIT_SEGMENT << 4, %edi
78
	mov $e_vesa_init - vesa_init, %ecx
79
	cld
80
	rep movsb
1289 vana 81
 
1641 decky 82
	mov $VESA_INIT_SEGMENT << 4, %edi
83
	jmpl *%edi
84
 
85
	vesa_meeting_point:
86
 
87
	mov %esi, KA2PA(vesa_ph_addr)
88
	mov %di, KA2PA(vesa_height)
89
	shr $16, %edi
90
	mov %di, KA2PA(vesa_width)
91
	mov %bx, KA2PA(vesa_scanline)
92
	shr $16, %ebx
93
	mov %bx, KA2PA(vesa_bpp)
1289 vana 94
#endif	
95
 
694 decky 96
	# Protected 32-bit. We want to reuse the code-seg descriptor,
97
	# the Default operand size must not be 1 when entering long mode
275 palkovsky 98
 
696 decky 99
	movl $0x80000000, %eax  
100
 	cpuid
101
 	cmp $0x80000000, %eax						# any function > 80000000h?
102
	jbe long_mode_unsupported
103
	movl $(AMD_CPUID_EXTENDED), %eax			# Extended function code 80000001
104
	cpuid
105
	bt $29, %edx								# Test if long mode is supported.
106
 	jc long_mode_supported
107
 
108
	long_mode_unsupported:
109
		cli
110
		hlt
111
 
112
	long_mode_supported:
113
 
188 palkovsky 114
	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
115
	# Paging is not enabled until after long mode is enabled
694 decky 116
 
188 palkovsky 117
	movl %cr4, %eax
118
	btsl $5, %eax
119
	movl %eax, %cr4
120
 
121
	# Set up paging tables
694 decky 122
 
188 palkovsky 123
	leal ptl_0, %eax
124
	movl %eax, %cr3
275 palkovsky 125
 
188 palkovsky 126
	# Enable long mode
178 palkovsky 127
 
694 decky 128
	movl $EFER_MSR_NUM, %ecx	# EFER MSR number
129
	rdmsr						# Read EFER
130
	btsl $AMD_LME_FLAG, %eax	# Set LME=1
131
	wrmsr						# Write EFER
132
 
188 palkovsky 133
	# Enable paging to activate long mode (set CR0.PG=1)
694 decky 134
 
188 palkovsky 135
	movl %cr0, %eax
136
	btsl $31, %eax
137
	movl %eax, %cr0
138
 
139
	# At this point we are in compatibility mode
694 decky 140
 
206 palkovsky 141
	jmpl $gdtselector(KTEXT_DES), $start64
164 palkovsky 142
 
188 palkovsky 143
.code64
144
start64:
275 palkovsky 145
	movq $(PA2KA(START_STACK)), %rsp
695 decky 146
	movl grub_eax, %eax
147
	movl grub_ebx, %ebx
148
 
149
	cmpl $MULTIBOOT_LOADER_MAGIC, %eax				# compare GRUB signature
150
	je valid_boot
151
 
152
		xorl %ecx, %ecx							# no memory size or map available
153
		movl %ecx, e801memorysize
154
		movl %ecx, e820counter
155
 
156
		jmp invalid_boot
157
 
158
	valid_boot:
159
 
160
		movl (%ebx), %eax						# ebx = physical address of struct multiboot_info
161
 
162
		bt $0, %eax								# mbi->flags[0] (mem_lower, mem_upper valid)
163
		jc mem_valid
164
 
165
			xorl %ecx, %ecx
166
			jmp mem_invalid
167
 
168
		mem_valid:
169
		movl 4(%ebx), %ecx						# mbi->mem_lower
170
		addl 8(%ebx), %ecx						# mbi->mem_upper
171
 
172
		mem_invalid:
173
		movl %ecx, e801memorysize
174
 
1039 decky 175
		bt $3, %eax								# mbi->flags[3] (mods_count, mods_addr valid)
695 decky 176
		jc mods_valid
177
 
1052 decky 178
			xorq %rcx, %rcx
179
			movq %rcx, init
1039 decky 180
			jmp mods_end
695 decky 181
 
182
		mods_valid:
1039 decky 183
 
184
		xorq %rcx, %rcx
695 decky 185
		movl 20(%ebx), %ecx						# mbi->mods_count
1052 decky 186
		movq %rcx, init
1039 decky 187
 
695 decky 188
		cmpl $0, %ecx
1039 decky 189
		je mods_end
695 decky 190
 
191
		movl 24(%ebx), %esi						# mbi->mods_addr
1039 decky 192
		movq $init, %rdi
695 decky 193
 
1039 decky 194
		mods_loop:
195
 
196
			xorq %rdx, %rdx
197
			movl 0(%esi), %edx					# mods->mod_start
1063 palkovsky 198
			movq $0xffff800000000000, %r10
199
			addq %r10, %rdx
1052 decky 200
			movq %rdx, 8(%rdi)
1039 decky 201
 
202
			xorq %rdx, %rdx
203
			movl 4(%esi), %edx
204
			subl 0(%esi), %edx					# mods->mod_end - mods->mod_start
1052 decky 205
			movq %rdx, 16(%rdi)
1039 decky 206
 
207
			addl $16, %esi
208
			addq $16, %rdi
209
 
210
			loop mods_loop
211
 
212
		mods_end:
695 decky 213
 
214
		bt $6, %eax								# mbi->flags[6] (mmap_length, mmap_addr valid)	
215
		jc mmap_valid
216
 
217
			xorl %edx, %edx
218
			jmp mmap_invalid
219
 
220
		mmap_valid:
221
		movl 44(%ebx), %ecx						# mbi->mmap_length
222
		movl 48(%ebx), %esi						# mbi->mmap_addr
223
		movq $e820table, %rdi
224
		xorl %edx, %edx
225
 
226
		mmap_loop:
227
			cmpl $0, %ecx
228
			jle mmap_end
229
 
230
			movl 4(%esi), %eax					# mmap->base_addr_low
231
			movl %eax, (%rdi)
232
 
233
			movl 8(%esi), %eax					# mmap->base_addr_high
234
			movl %eax, 4(%rdi)
235
 
236
			movl 12(%esi), %eax					# mmap->length_low
237
			movl %eax, 8(%rdi)
238
 
239
			movl 16(%esi), %eax					# mmap->length_high
240
			movl %eax, 12(%rdi)
241
 
242
			movl 20(%esi), %eax					# mmap->type
243
			movl %eax, 16(%rdi)
244
 
245
			movl (%esi), %eax					# mmap->size
246
			addl $0x4, %eax
247
			addl %eax, %esi
248
			subl %eax, %ecx
249
			addq $MEMMAP_E820_RECORD_SIZE, %rdi
250
			incl %edx
251
			jmp mmap_loop
252
 
253
		mmap_end:
254
 
255
		mmap_invalid:
256
		movl %edx, e820counter
257
 
258
	invalid_boot:
259
 
696 decky 260
#ifdef CONFIG_SMP
261
 
262
	# copy AP bootstrap routines below 1 MB
263
 
264
	movq $BOOT_OFFSET, %rsi
265
	movq $AP_BOOT_OFFSET, %rdi
266
	movq $_hardcoded_unmapped_size, %rcx
267
	cld
268
	rep movsb
269
 
270
#endif
271
 
694 decky 272
	call main_bsp   # never returns
178 palkovsky 273
 
694 decky 274
	cli
275
	hlt
1289 vana 276
 
277
#ifdef CONFIG_FB
278
.code32
279
vesa_init:
1641 decky 280
	jmp $gdtselector(VESA_INIT_DES), $vesa_init_real - vesa_init
281
 
1289 vana 282
.code16
1641 decky 283
vesa_init_real:
1289 vana 284
 
1641 decky 285
	mov %cr0, %eax
286
	and $~1, %eax
287
	mov %eax, %cr0
288
 
289
	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
290
 
291
vesa_init_real2:
292
 
293
	mov $VESA_INIT_SEGMENT, %bx
294
 
295
	mov %bx, %es
296
	mov %bx, %fs
297
	mov %bx, %gs
298
	mov %bx, %ds
299
	mov %bx, %ss
300
 
301
	movl $0x0000fffc, %esp
302
    movl $0x0000fffc, %ebp
303
 
1289 vana 304
#define VESA_INFO_SIZE 1024
305
 
1641 decky 306
#define VESA_MODE_LIST_PTR_OFFSET 14
1289 vana 307
#define VESA_MODE_WIDTH_OFFSET 18
308
#define VESA_MODE_HEIGHT_OFFSET 20
309
#define VESA_MODE_BPP_OFFSET 25
310
#define VESA_MODE_SCANLINE_OFFSET 16
311
#define VESA_MODE_PHADDR_OFFSET 40
312
 
1641 decky 313
#define VESA_END_OF_MODES 0xffff
1289 vana 314
 
1641 decky 315
#define VESA_OK 0x4f
1289 vana 316
 
1641 decky 317
#define VESA_GET_INFO 0x4f00
1289 vana 318
#define VESA_GET_MODE_INFO 0x4f01
319
#define VESA_SET_MODE 0x4f02
320
 
321
#define CONFIG_VESA_BPP_a 255
322
 
1641 decky 323
#if CONFIG_VESA_BPP == 24
1289 vana 324
#undef CONFIG_VESA_BPP_a
325
#define CONFIG_VESA_BPP_a 32
326
#endif
1641 decky 327
 
328
	mov $VESA_GET_INFO, %ax
329
	mov $e_vesa_init - vesa_init, %di
330
	push %di
331
	int $0x10
332
 
333
	pop %di
334
	cmp $VESA_OK, %al
335
	jnz 0f
336
 
337
	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
338
	mov %si, %gs
339
	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
340
 
341
	add $VESA_INFO_SIZE, %di
342
 
1289 vana 343
1:# Try next mode
1641 decky 344
	mov %gs:(%si), %cx
345
	cmp $VESA_END_OF_MODES, %cx
346
	jz 0f
347
 
348
	inc %si
349
	inc %si
350
	push %cx
351
	push %di
352
	push %si
353
	mov $VESA_GET_MODE_INFO, %ax
354
	int $0x10
355
 
356
	pop %si
357
	pop %di
358
	pop %cx
359
	cmp $VESA_OK, %al
360
	jnz 0f
361
 
362
	mov $CONFIG_VESA_WIDTH, %ax
363
	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
364
	jnz 1b
365
 
366
	mov $CONFIG_VESA_HEIGHT, %ax
367
	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
368
	jnz 1b
369
 
370
	mov $CONFIG_VESA_BPP, %al
371
	cmp VESA_MODE_BPP_OFFSET(%di), %al
372
	jz 2f
373
 
374
	mov $CONFIG_VESA_BPP_a, %al
375
	cmp VESA_MODE_BPP_OFFSET(%di), %al
376
	jnz 1b
377
 
1289 vana 378
2:
379
 
1641 decky 380
	mov %cx, %bx
381
	or $0xc000, %bx
382
	push %di
383
	mov $VESA_SET_MODE, %ax
384
	int $0x10
1289 vana 385
 
1641 decky 386
	pop %di
387
	cmp $VESA_OK, %al
388
	jnz 0f
1289 vana 389
 
1641 decky 390
	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
391
	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
392
	shl $16, %eax
393
	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
394
	mov VESA_MODE_BPP_OFFSET(%di), %bl
395
	xor %bh, %bh
396
	shl $16, %ebx
397
	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
398
	mov %eax, %edi
399
 
400
8:
401
 
402
	mov %cr0, %eax
403
	or $1, %eax
404
	mov %eax, %cr0
405
 
406
	jmp 9f
1289 vana 407
9:
1641 decky 408
 
409
	ljmpl $gdtselector(KTEXT32_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
410
 
411
0:# No prefered mode found
412
	mov $0x111, %cx
413
	push %di
414
	push %cx
415
	mov $VESA_GET_MODE_INFO, %ax
416
	int $0x10
417
 
418
	pop %cx
419
	pop %di
420
	cmp $VESA_OK, %al
421
	jnz 1f
422
	jz 2b						# Force relative jump
1289 vana 423
 
1641 decky 424
1:
425
	mov $0x0003, %ax
426
	int $0x10
427
	mov $0xffffffff, %edi		# EGA text mode used, because of problems with VESA
428
	xor %ax, %ax
429
	jz 8b						# Force relative jump
430
 
431
 
1289 vana 432
.code32
1641 decky 433
vesa_init_protect:
434
	movw $gdtselector(KDATA_DES), %cx
435
	movw %cx, %es
436
	movw %cx, %ds							# kernel data + stack
437
	movw %cx, %ss
438
	# Simics seems to remove hidden part of GS on entering user mode
439
	#  when _visible_ part of GS does not point to user-mode segment
440
	movw $gdtselector(UDATA_DES), %cx
441
	movw %cx, %fs
442
	movw %cx, %gs
443
 
444
	jmpl $gdtselector(KTEXT32_DES), $vesa_meeting_point
445
 
1289 vana 446
.align 4
447
e_vesa_init:
448
#endif	
206 palkovsky 449
 
406 jermar 450
.section K_DATA_START, "aw", @progbits
164 palkovsky 451
.align 4096
206 palkovsky 452
 
417 palkovsky 453
# Identical mapping of first 64MB and the same of -2GB -> 0	
188 palkovsky 454
.global ptl_2
455
ptl_2:	
456
	.quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
457
	.quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
458
	.quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
459
	.quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
460
	.quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
461
	.quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
462
	.quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
463
	.quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
417 palkovsky 464
	.quad 0x1000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
465
	.quad 0x1200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
466
	.quad 0x1400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
467
	.quad 0x1600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
468
	.quad 0x1800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
469
	.quad 0x1a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
470
	.quad 0x1c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
471
	.quad 0x1e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
472
	.quad 0x2000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
473
	.quad 0x2200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
474
	.quad 0x2400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
475
	.quad 0x2600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
476
	.quad 0x2800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
477
	.quad 0x2a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
478
	.quad 0x2c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
479
	.quad 0x2e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
480
	.quad 0x3000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
481
	.quad 0x3200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
482
	.quad 0x3400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
483
	.quad 0x3600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
484
	.quad 0x3800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
485
	.quad 0x3a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
486
	.quad 0x3c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
487
	.quad 0x3e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
188 palkovsky 488
 
489
.align 4096
490
.global ptl_1
491
ptl_1:
492
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
493
	.fill 509,8,0
494
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
293 palkovsky 495
	.fill 1,8,0
188 palkovsky 496
 
497
.align 4096
498
.global ptl_0
499
ptl_0:
500
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
1063 palkovsky 501
	.fill 255,8,0
188 palkovsky 502
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
1063 palkovsky 503
	.fill 254,8,0
504
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
178 palkovsky 505
 
695 decky 506
.global bootstrap_gdtr
507
bootstrap_gdtr:
685 decky 508
	.word gdtselector(GDT_ITEMS)
509
	.long KA2PA(gdt)
695 decky 510
 
511
grub_eax:
512
	.long 0
513
 
514
grub_ebx:
515
	.long 0