WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia32/src/boot/boot.S


#
# Copyright (C) 2001-2004 Jakub Jermar
# Copyright (C) 2005-2006 Martin Decky
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
 
#include <arch/boot/boot.h>
#include <arch/boot/memmap.h>
#include <arch/mm/page.h>
#include <arch/pm.h>
 
#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
 
.section K_TEXT_START, "ax"
 
KTEXT=8
KDATA=16
 
.code32
.align 4
.global multiboot_image_start
multiboot_header:
	.long MULTIBOOT_HEADER_MAGIC
	.long MULTIBOOT_HEADER_FLAGS
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)	# checksum
	.long multiboot_header
	.long unmapped_ktext_start
	.long 0
	.long 0
	.long multiboot_image_start
	
multiboot_image_start:
	movl $START_STACK, %esp			# initialize stack pointer
	lgdt KA2PA(bootstrap_gdtr)		# initialize Global Descriptor Table register
 
	movw $KDATA, %cx
	movw %cx, %es
	movw %cx, %fs
	movw %cx, %gs
	movw %cx, %ds					# kernel data + stack
	movw %cx, %ss
	
	jmpl $KTEXT, $multiboot_meeting_point
	multiboot_meeting_point:
	
	pushl %ebx							# save parameters from GRUB
	pushl %eax
	
#ifdef CONFIG_FB
	mov $vesa_init, %esi
	mov $VESA_INIT_SEGMENT << 4, %edi
	mov $e_vesa_init - vesa_init, %ecx
	cld
	rep movsb
 
	mov $VESA_INIT_SEGMENT << 4, %edi
	jmpl %edi
	
	vesa_meeting_point:
	
	mov %esi, KA2PA(vesa_ph_addr)
	mov %di, KA2PA(vesa_height)
	shr $16, %edi
	mov %di, KA2PA(vesa_width)
	mov %bx, KA2PA(vesa_scanline)
	shr $16, %ebx
	mov %bx, KA2PA(vesa_bpp)
#endif	
	
	call map_kernel							# map kernel and turn paging on
	
	popl %eax
	popl %ebx
	cmpl $MULTIBOOT_LOADER_MAGIC, %eax				# compare GRUB signature
	je valid_boot
		
		xorl %ecx, %ecx							# no memory size or map available
		movl %ecx, e801memorysize
		movl %ecx, e820counter
		
		jmp invalid_boot
		
	valid_boot:
		
		movl (%ebx), %eax						# ebx = physical address of struct multiboot_info
		
		bt $0, %eax								# mbi->flags[0] (mem_lower, mem_upper valid)
		jc mem_valid
			
			xorl %ecx, %ecx
			jmp mem_invalid
			
		mem_valid:
		movl 4(%ebx), %ecx						# mbi->mem_lower
		addl 8(%ebx), %ecx						# mbi->mem_upper
		
		mem_invalid:
		movl %ecx, e801memorysize
		
		bt $3, %eax								# mbi->flags[3] (mods_count, mods_addr valid)
		jc mods_valid
			
			xorl %ecx, %ecx
			movl %ecx, init
			jmp mods_end
		
		mods_valid:
		
		movl 20(%ebx), %ecx						# mbi->mods_count
		movl %ecx, init
		
		cmpl $0, %ecx
		je mods_end
		
		movl 24(%ebx), %esi						# mbi->mods_addr
		movl $init, %edi
		
		mods_loop:
		
			movl 0(%esi), %edx					# mods->mod_start
			addl $0x80000000, %edx
			movl %edx, 4(%edi)
			
			movl 4(%esi), %edx
			subl 0(%esi), %edx					# mods->mod_end - mods->mod_start
			movl %edx, 8(%edi)
			
			addl $16, %esi
			addl $8	, %edi
			
			loop mods_loop
			
		mods_end:
		
		bt $6, %eax								# mbi->flags[6] (mmap_length, mmap_addr valid)	
		jc mmap_valid
			
			xorl %edx, %edx
			jmp mmap_invalid
			
		mmap_valid:
		movl 44(%ebx), %ecx						# mbi->mmap_length
		movl 48(%ebx), %esi						# mbi->mmap_addr
		movl $e820table, %edi
		xorl %edx, %edx
		
		mmap_loop:
			cmpl $0, %ecx
			jle mmap_end
			
			movl 4(%esi), %eax					# mmap->base_addr_low
			movl %eax, (%edi)
			
			movl 8(%esi), %eax					# mmap->base_addr_high
			movl %eax, 4(%edi)
			
			movl 12(%esi), %eax					# mmap->length_low
			movl %eax, 8(%edi)
			
			movl 16(%esi), %eax					# mmap->length_high
			movl %eax, 12(%edi)
			
			movl 20(%esi), %eax					# mmap->type
			movl %eax, 16(%edi)
			
			movl (%esi), %eax					# mmap->size
			addl $0x4, %eax
			addl %eax, %esi
			subl %eax, %ecx
			addl $MEMMAP_E820_RECORD_SIZE, %edi
			incl %edx
			jmp mmap_loop
		
		mmap_end:
		
		mmap_invalid:
		movl %edx, e820counter
		
	invalid_boot:
	
#ifdef CONFIG_SMP
	
	# copy AP bootstrap routines below 1 MB
	
	movl $BOOT_OFFSET, %esi
	movl $AP_BOOT_OFFSET, %edi
	movl $_hardcoded_unmapped_size, %ecx
	cld
	rep movsb
	
#endif
	
	call main_bsp								# never returns
 
	cli
	hlt
 
.global map_kernel
map_kernel:
	#
	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
	# For simplicity, we map the entire 4G space.
	#
	movl %cr4, %ecx
	orl $(1<<4), %ecx
	movl %ecx, %cr4							# turn PSE on
	
	movl $(page_directory+0), %esi
	movl $(page_directory+2048), %edi
	xorl %ecx, %ecx
	xorl %ebx, %ebx
0:
	movl $((1<<7)|(1<<0)), %eax
	orl %ebx, %eax
	movl %eax, (%esi,%ecx,4)					# mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M
	movl %eax, (%edi,%ecx,4)					# mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M
	addl $(4*1024*1024), %ebx
 
	incl %ecx
	cmpl $512, %ecx
	jl 0b
 
	movl %esi, %cr3
	
	# turn paging on
	movl %cr0, %ebx
	orl $(1<<31), %ebx
	movl %ebx, %cr0
	ret
 
#ifdef CONFIG_FB
vesa_init:
	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
	
.code16
vesa_init_real:
	
	mov %cr0, %eax
	and $~1, %eax
	mov %eax, %cr0
	
	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
	
vesa_init_real2:
	
	mov $VESA_INIT_SEGMENT, %bx
	
	mov %bx, %es
	mov %bx, %fs
	mov %bx, %gs
	mov %bx, %ds
	mov %bx, %ss
	
	movl %esp, %eax
	movl $0x0000fffc, %esp
	movl $0x0000fffc, %ebp
	pushl %eax
	
#define VESA_INFO_SIZE 1024
 
#define VESA_MODE_LIST_PTR_OFFSET 14
#define VESA_MODE_WIDTH_OFFSET 18
#define VESA_MODE_HEIGHT_OFFSET 20
#define VESA_MODE_BPP_OFFSET 25
#define VESA_MODE_SCANLINE_OFFSET 16
#define VESA_MODE_PHADDR_OFFSET 40
 
#define VESA_END_OF_MODES 0xffff
 
#define VESA_OK 0x4f
 
#define VESA_GET_INFO 0x4f00
#define VESA_GET_MODE_INFO 0x4f01
#define VESA_SET_MODE 0x4f02
 
#define CONFIG_VESA_BPP_a 255
 
#if CONFIG_VESA_BPP == 24
#undef CONFIG_VESA_BPP_a
#define CONFIG_VESA_BPP_a 32
#endif
 
	mov $VESA_GET_INFO, %ax
	mov $e_vesa_init - vesa_init, %di
	push %di
	int $0x10
	
	pop %di
	cmp $VESA_OK, %al
	jnz 0f
	
	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
	mov %si, %gs
	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
	
	add $VESA_INFO_SIZE, %di
 
1:# Try next mode
	mov %gs:(%si), %cx
	cmp $VESA_END_OF_MODES, %cx
	jz 0f
	
	inc %si
	inc %si
	push %cx
	push %di
	push %si
	mov $VESA_GET_MODE_INFO, %ax
	int $0x10
	
	pop %si
	pop %di
	pop %cx
	cmp $VESA_OK, %al
	jnz 0f
	
	mov $CONFIG_VESA_WIDTH, %ax
	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
	jnz 1b
	
	mov $CONFIG_VESA_HEIGHT,%ax
	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
	jnz 1b
	
	mov $CONFIG_VESA_BPP, %al
	cmp VESA_MODE_BPP_OFFSET(%di), %al
	jz 2f
	
	mov $CONFIG_VESA_BPP_a, %al
	cmp VESA_MODE_BPP_OFFSET(%di), %al
	jnz 1b
	
2:
	
	mov %cx, %bx
	or $0xc000, %bx
	push %di
	mov $VESA_SET_MODE, %ax
	int $0x10
	
	pop %di
	cmp $VESA_OK, %al
	jnz 0f
	
	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
	shl $16, %eax
	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
	mov VESA_MODE_BPP_OFFSET(%di), %bl
	xor %bh, %bh
	shl $16, %ebx
	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
	mov %eax, %edi
	
8:	
	
	mov %cr0, %eax
	or $1, %eax
	mov %eax, %cr0
	
	jmp 9f
9:
	
	ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
 
0:# No prefered mode found
	mov $0x111, %cx
	push %di
	push %cx
	mov $VESA_GET_MODE_INFO, %ax
	int $0x10
	
	pop %cx
	pop %di
	cmp $VESA_OK, %al
	jnz 1f
	jz 2b						# Force relative jump
	
1:
	mov $0x0003, %ax
	int $0x10
	mov $0xffffffff, %edi		# EGA text mode used, because of problems with VESA
	xor %ax, %ax
	jz 8b						# Force relative jump
	
 
.code32
vesa_init_protect:
	popl %esp
 
	movw $KDATA, %cx
	movw %cx, %es
	movw %cx, %fs
	movw %cx, %gs
	movw %cx, %ds					# kernel data + stack
	movw %cx, %ss
	
	jmpl $KTEXT, $vesa_meeting_point
 
.align 4
e_vesa_init:
#endif	
 
.section K_DATA_START, "aw", @progbits
 
.align 4096
page_directory:
	.space 4096, 0
 

Rev 1639	Rev 1641
1	#	1	#
2	# Copyright (C) 2001-2004 Jakub Jermar	2	# Copyright (C) 2001-2004 Jakub Jermar
3	# Copyright (C) 2005-2006 Martin Decky	3	# Copyright (C) 2005-2006 Martin Decky
4	# All rights reserved.	4	# All rights reserved.
5	#	5	#
6	# Redistribution and use in source and binary forms, with or without	6	# Redistribution and use in source and binary forms, with or without
7	# modification, are permitted provided that the following conditions	7	# modification, are permitted provided that the following conditions
8	# are met:	8	# are met:
9	#	9	#
10	# - Redistributions of source code must retain the above copyright	10	# - Redistributions of source code must retain the above copyright
11	# notice, this list of conditions and the following disclaimer.	11	# notice, this list of conditions and the following disclaimer.
12	# - Redistributions in binary form must reproduce the above copyright	12	# - Redistributions in binary form must reproduce the above copyright
13	# notice, this list of conditions and the following disclaimer in the	13	# notice, this list of conditions and the following disclaimer in the
14	# documentation and/or other materials provided with the distribution.	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	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.	16	# derived from this software without specific prior written permission.
17	#	17	#
18	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	19	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	24	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	27	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	#	28	#
29		29
30	#include <arch/boot/boot.h>	30	#include <arch/boot/boot.h>
31	#include <arch/boot/memmap.h>	31	#include <arch/boot/memmap.h>
32	#include <arch/mm/page.h>	32	#include <arch/mm/page.h>
33	#include <arch/pm.h>	33	#include <arch/pm.h>
34		34
35	#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)	35	#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
36		36
37	.section K_TEXT_START, "ax"	37	.section K_TEXT_START, "ax"
38		38
39	KTEXT=8	39	KTEXT=8
40	KDATA=16	40	KDATA=16
41		41
42	.code32	42	.code32
43	.align 4	43	.align 4
44	.global multiboot_image_start	44	.global multiboot_image_start
45	multiboot_header:	45	multiboot_header:
46	.long MULTIBOOT_HEADER_MAGIC	46	.long MULTIBOOT_HEADER_MAGIC
47	.long MULTIBOOT_HEADER_FLAGS	47	.long MULTIBOOT_HEADER_FLAGS
48	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum	48	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum
49	.long multiboot_header	49	.long multiboot_header
50	.long unmapped_ktext_start	50	.long unmapped_ktext_start
51	.long 0	51	.long 0
52	.long 0	52	.long 0
53	.long multiboot_image_start	53	.long multiboot_image_start
54		54
55	multiboot_image_start:	55	multiboot_image_start:
56	movl $START_STACK, %esp # initialize stack pointer	56	movl $START_STACK, %esp # initialize stack pointer
57	lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register	57	lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register
58		58
59	movw $KDATA, %cx	59	movw $KDATA, %cx
60	movw %cx, %es	60	movw %cx, %es
61	movw %cx, %fs	61	movw %cx, %fs
62	movw %cx, %gs	62	movw %cx, %gs
63	movw %cx, %ds # kernel data + stack	63	movw %cx, %ds # kernel data + stack
64	movw %cx, %ss	64	movw %cx, %ss
65		65
66	jmpl $KTEXT, $multiboot_meeting_point	66	jmpl $KTEXT, $multiboot_meeting_point
67	multiboot_meeting_point:	67	multiboot_meeting_point:
68		68
69	pushl %ebx # save parameters from GRUB	69	pushl %ebx # save parameters from GRUB
70	pushl %eax	70	pushl %eax
71		71
72	#ifdef CONFIG_FB	72	#ifdef CONFIG_FB
73	mov $vesa_init, %esi	73	mov $vesa_init, %esi
74	mov $VESA_INIT_SEGMENT << 4, %edi	74	mov $VESA_INIT_SEGMENT << 4, %edi
75	mov $e_vesa_init - vesa_init, %ecx	75	mov $e_vesa_init - vesa_init, %ecx
76	cld	76	cld
77	rep movsb	77	rep movsb
78		78
79	mov $VESA_INIT_SEGMENT << 4, %edi	79	mov $VESA_INIT_SEGMENT << 4, %edi
80	jmpl %edi	80	jmpl %edi
81		81
82	vesa_meeting_point:	82	vesa_meeting_point:
83		83
84	mov %esi, KA2PA(vesa_ph_addr)	84	mov %esi, KA2PA(vesa_ph_addr)
85	mov %di, KA2PA(vesa_height)	85	mov %di, KA2PA(vesa_height)
86	shr $16, %edi	86	shr $16, %edi
87	mov %di, KA2PA(vesa_width)	87	mov %di, KA2PA(vesa_width)
88	mov %bx, KA2PA(vesa_scanline)	88	mov %bx, KA2PA(vesa_scanline)
89	shr $16, %ebx	89	shr $16, %ebx
90	mov %bx, KA2PA(vesa_bpp)	90	mov %bx, KA2PA(vesa_bpp)
91	#endif	91	#endif
92		92
93	call map_kernel # map kernel and turn paging on	93	call map_kernel # map kernel and turn paging on
94		94
95	popl %eax	95	popl %eax
96	popl %ebx	96	popl %ebx
97	cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature	97	cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature
98	je valid_boot	98	je valid_boot
99		99
100	xorl %ecx, %ecx # no memory size or map available	100	xorl %ecx, %ecx # no memory size or map available
101	movl %ecx, e801memorysize	101	movl %ecx, e801memorysize
102	movl %ecx, e820counter	102	movl %ecx, e820counter
103		103
104	jmp invalid_boot	104	jmp invalid_boot
105		105
106	valid_boot:	106	valid_boot:
107		107
108	movl (%ebx), %eax # ebx = physical address of struct multiboot_info	108	movl (%ebx), %eax # ebx = physical address of struct multiboot_info
109		109
110	bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)	110	bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)
111	jc mem_valid	111	jc mem_valid
112		112
113	xorl %ecx, %ecx	113	xorl %ecx, %ecx
114	jmp mem_invalid	114	jmp mem_invalid
115		115
116	mem_valid:	116	mem_valid:
117	movl 4(%ebx), %ecx # mbi->mem_lower	117	movl 4(%ebx), %ecx # mbi->mem_lower
118	addl 8(%ebx), %ecx # mbi->mem_upper	118	addl 8(%ebx), %ecx # mbi->mem_upper
119		119
120	mem_invalid:	120	mem_invalid:
121	movl %ecx, e801memorysize	121	movl %ecx, e801memorysize
122		122
123	bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)	123	bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)
124	jc mods_valid	124	jc mods_valid
125		125
126	xorl %ecx, %ecx	126	xorl %ecx, %ecx
127	movl %ecx, init	127	movl %ecx, init
128	jmp mods_end	128	jmp mods_end
129		129
130	mods_valid:	130	mods_valid:
131		131
132	movl 20(%ebx), %ecx # mbi->mods_count	132	movl 20(%ebx), %ecx # mbi->mods_count
133	movl %ecx, init	133	movl %ecx, init
134		134
135	cmpl $0, %ecx	135	cmpl $0, %ecx
136	je mods_end	136	je mods_end
137		137
138	movl 24(%ebx), %esi # mbi->mods_addr	138	movl 24(%ebx), %esi # mbi->mods_addr
139	movl $init, %edi	139	movl $init, %edi
140		140
141	mods_loop:	141	mods_loop:
142		142
143	movl 0(%esi), %edx # mods->mod_start	143	movl 0(%esi), %edx # mods->mod_start
144	addl $0x80000000, %edx	144	addl $0x80000000, %edx
145	movl %edx, 4(%edi)	145	movl %edx, 4(%edi)
146		146
147	movl 4(%esi), %edx	147	movl 4(%esi), %edx
148	subl 0(%esi), %edx # mods->mod_end - mods->mod_start	148	subl 0(%esi), %edx # mods->mod_end - mods->mod_start
149	movl %edx, 8(%edi)	149	movl %edx, 8(%edi)
150		150
151	addl $16, %esi	151	addl $16, %esi
152	addl $8 , %edi	152	addl $8 , %edi
153		153
154	loop mods_loop	154	loop mods_loop
155		155
156	mods_end:	156	mods_end:
157		157
158	bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid)	158	bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid)
159	jc mmap_valid	159	jc mmap_valid
160		160
161	xorl %edx, %edx	161	xorl %edx, %edx
162	jmp mmap_invalid	162	jmp mmap_invalid
163		163
164	mmap_valid:	164	mmap_valid:
165	movl 44(%ebx), %ecx # mbi->mmap_length	165	movl 44(%ebx), %ecx # mbi->mmap_length
166	movl 48(%ebx), %esi # mbi->mmap_addr	166	movl 48(%ebx), %esi # mbi->mmap_addr
167	movl $e820table, %edi	167	movl $e820table, %edi
168	xorl %edx, %edx	168	xorl %edx, %edx
169		169
170	mmap_loop:	170	mmap_loop:
171	cmpl $0, %ecx	171	cmpl $0, %ecx
172	jle mmap_end	172	jle mmap_end
173		173
174	movl 4(%esi), %eax # mmap->base_addr_low	174	movl 4(%esi), %eax # mmap->base_addr_low
175	movl %eax, (%edi)	175	movl %eax, (%edi)
176		176
177	movl 8(%esi), %eax # mmap->base_addr_high	177	movl 8(%esi), %eax # mmap->base_addr_high
178	movl %eax, 4(%edi)	178	movl %eax, 4(%edi)
179		179
180	movl 12(%esi), %eax # mmap->length_low	180	movl 12(%esi), %eax # mmap->length_low
181	movl %eax, 8(%edi)	181	movl %eax, 8(%edi)
182		182
183	movl 16(%esi), %eax # mmap->length_high	183	movl 16(%esi), %eax # mmap->length_high
184	movl %eax, 12(%edi)	184	movl %eax, 12(%edi)
185		185
186	movl 20(%esi), %eax # mmap->type	186	movl 20(%esi), %eax # mmap->type
187	movl %eax, 16(%edi)	187	movl %eax, 16(%edi)
188		188
189	movl (%esi), %eax # mmap->size	189	movl (%esi), %eax # mmap->size
190	addl $0x4, %eax	190	addl $0x4, %eax
191	addl %eax, %esi	191	addl %eax, %esi
192	subl %eax, %ecx	192	subl %eax, %ecx
193	addl $MEMMAP_E820_RECORD_SIZE, %edi	193	addl $MEMMAP_E820_RECORD_SIZE, %edi
194	incl %edx	194	incl %edx
195	jmp mmap_loop	195	jmp mmap_loop
196		196
197	mmap_end:	197	mmap_end:
198		198
199	mmap_invalid:	199	mmap_invalid:
200	movl %edx, e820counter	200	movl %edx, e820counter
201		201
202	invalid_boot:	202	invalid_boot:
203		203
204	#ifdef CONFIG_SMP	204	#ifdef CONFIG_SMP
205		205
206	# copy AP bootstrap routines below 1 MB	206	# copy AP bootstrap routines below 1 MB
207		207
208	movl $BOOT_OFFSET, %esi	208	movl $BOOT_OFFSET, %esi
209	movl $AP_BOOT_OFFSET, %edi	209	movl $AP_BOOT_OFFSET, %edi
210	movl $_hardcoded_unmapped_size, %ecx	210	movl $_hardcoded_unmapped_size, %ecx
211	cld	211	cld
212	rep movsb	212	rep movsb
213		213
214	#endif	214	#endif
215		215
216	call main_bsp # never returns	216	call main_bsp # never returns
217		217
218	cli	218	cli
219	hlt	219	hlt
220		220
221	.global map_kernel	221	.global map_kernel
222	map_kernel:	222	map_kernel:
223	#	223	#
224	# Here we setup mapping for both the unmapped and mapped sections of the kernel.	224	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
225	# For simplicity, we map the entire 4G space.	225	# For simplicity, we map the entire 4G space.
226	#	226	#
227	movl %cr4, %ecx	227	movl %cr4, %ecx
228	orl $(1<<4), %ecx	228	orl $(1<<4), %ecx
229	movl %ecx, %cr4 # turn PSE on	229	movl %ecx, %cr4 # turn PSE on
230		230
231	movl $(page_directory+0), %esi	231	movl $(page_directory+0), %esi
232	movl $(page_directory+2048), %edi	232	movl $(page_directory+2048), %edi
233	xorl %ecx, %ecx	233	xorl %ecx, %ecx
234	xorl %ebx, %ebx	234	xorl %ebx, %ebx
235	0:	235	0:
236	movl $((1<<7)\|(1<<0)), %eax	236	movl $((1<<7)\|(1<<0)), %eax
237	orl %ebx, %eax	237	orl %ebx, %eax
238	movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx4M => 0x00000000+%ecx4M	238	movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx4M => 0x00000000+%ecx4M
239	movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx4M => 0x00000000+%ecx4M	239	movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx4M => 0x00000000+%ecx4M
240	addl $(410241024), %ebx	240	addl $(410241024), %ebx
241		241
242	incl %ecx	242	incl %ecx
243	cmpl $512, %ecx	243	cmpl $512, %ecx
244	jl 0b	244	jl 0b
245		245
246	movl %esi, %cr3	246	movl %esi, %cr3
247		247
248	# turn paging on	248	# turn paging on
249	movl %cr0, %ebx	249	movl %cr0, %ebx
250	orl $(1<<31), %ebx	250	orl $(1<<31), %ebx
251	movl %ebx, %cr0	251	movl %ebx, %cr0
252	ret	252	ret
253		253
254	#ifdef CONFIG_FB	254	#ifdef CONFIG_FB
255	vesa_init:	255	vesa_init:
256	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init	256	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
257		257
258	.code16	258	.code16
259	vesa_init_real:	259	vesa_init_real:
260		260
261	mov %cr0, %eax	261	mov %cr0, %eax
262	and $~1, %eax	262	and $~1, %eax
263	mov %eax, %cr0	263	mov %eax, %cr0
264		264
265	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init	265	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
266		266
267	vesa_init_real2:	267	vesa_init_real2:
268		268
269	mov $VESA_INIT_SEGMENT, %bx	269	mov $VESA_INIT_SEGMENT, %bx
270		270
271	mov %bx, %es	271	mov %bx, %es
272	mov %bx, %fs	272	mov %bx, %fs
273	mov %bx, %gs	273	mov %bx, %gs
274	mov %bx, %ds	274	mov %bx, %ds
275	mov %bx, %ss	275	mov %bx, %ss
276		276
277	movl %esp, %eax	277	movl %esp, %eax
278	movl $0x0000fffc, %esp	278	movl $0x0000fffc, %esp
279	movl $0x0000fffc, %ebp	279	movl $0x0000fffc, %ebp
280	pushl %eax	280	pushl %eax
281		281
282	#define VESA_INFO_SIZE 1024	282	#define VESA_INFO_SIZE 1024
283		283
284	#define VESA_MODE_LIST_PTR_OFFSET 14	284	#define VESA_MODE_LIST_PTR_OFFSET 14
285	#define VESA_MODE_WIDTH_OFFSET 18	285	#define VESA_MODE_WIDTH_OFFSET 18
286	#define VESA_MODE_HEIGHT_OFFSET 20	286	#define VESA_MODE_HEIGHT_OFFSET 20
287	#define VESA_MODE_BPP_OFFSET 25	287	#define VESA_MODE_BPP_OFFSET 25
288	#define VESA_MODE_SCANLINE_OFFSET 16	288	#define VESA_MODE_SCANLINE_OFFSET 16
289	#define VESA_MODE_PHADDR_OFFSET 40	289	#define VESA_MODE_PHADDR_OFFSET 40
290		290
291	#define VESA_END_OF_MODES 0xffff	291	#define VESA_END_OF_MODES 0xffff
292		292
293	#define VESA_OK 0x4f	293	#define VESA_OK 0x4f
294		294
295	#define VESA_GET_INFO 0x4f00	295	#define VESA_GET_INFO 0x4f00
296	#define VESA_GET_MODE_INFO 0x4f01	296	#define VESA_GET_MODE_INFO 0x4f01
297	#define VESA_SET_MODE 0x4f02	297	#define VESA_SET_MODE 0x4f02
298		298
299	#define CONFIG_VESA_BPP_a 255	299	#define CONFIG_VESA_BPP_a 255
300		300
301	#if CONFIG_VESA_BPP == 24	301	#if CONFIG_VESA_BPP == 24
302	#undef CONFIG_VESA_BPP_a	302	#undef CONFIG_VESA_BPP_a
303	#define CONFIG_VESA_BPP_a 32	303	#define CONFIG_VESA_BPP_a 32
304	#endif	304	#endif
305		305
306	mov $VESA_GET_INFO, %ax	306	mov $VESA_GET_INFO, %ax
307	mov $e_vesa_init - vesa_init, %di	307	mov $e_vesa_init - vesa_init, %di
308	push %di	308	push %di
309	int $0x10	309	int $0x10
310		310
311	pop %di	311	pop %di
312	cmp $VESA_OK, %al	312	cmp $VESA_OK, %al
313	jnz 0f	313	jnz 0f
314		314
315	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si	315	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
316	mov %si, %gs	316	mov %si, %gs
317	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si	317	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
318		318
319	add $VESA_INFO_SIZE, %di	319	add $VESA_INFO_SIZE, %di
320		320
321	1:# Try next mode	321	1:# Try next mode
322	mov %gs:(%si), %cx	322	mov %gs:(%si), %cx
323	cmp $VESA_END_OF_MODES, %cx	323	cmp $VESA_END_OF_MODES, %cx
324	jz 0f	324	jz 0f
325		325
326	inc %si	326	inc %si
327	inc %si	327	inc %si
328	push %cx	328	push %cx
329	push %di	329	push %di
330	push %si	330	push %si
331	mov $VESA_GET_MODE_INFO, %ax	331	mov $VESA_GET_MODE_INFO, %ax
332	int $0x10	332	int $0x10
333		333
334	pop %si	334	pop %si
335	pop %di	335	pop %di
336	pop %cx	336	pop %cx
337	cmp $VESA_OK, %al	337	cmp $VESA_OK, %al
338	jnz 0f	338	jnz 0f
339		339
340	mov $CONFIG_VESA_WIDTH, %ax	340	mov $CONFIG_VESA_WIDTH, %ax
341	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax	341	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
342	jnz 1b	342	jnz 1b
343		343
344	mov $CONFIG_VESA_HEIGHT,%ax	344	mov $CONFIG_VESA_HEIGHT,%ax
345	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax	345	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
346	jnz 1b	346	jnz 1b
347		347
348	mov $CONFIG_VESA_BPP, %al	348	mov $CONFIG_VESA_BPP, %al
349	cmp VESA_MODE_BPP_OFFSET(%di), %al	349	cmp VESA_MODE_BPP_OFFSET(%di), %al
350	jz 2f	350	jz 2f
351		351
352	mov $CONFIG_VESA_BPP_a, %al	352	mov $CONFIG_VESA_BPP_a, %al
353	cmp VESA_MODE_BPP_OFFSET(%di), %al	353	cmp VESA_MODE_BPP_OFFSET(%di), %al
354	jnz 1b	354	jnz 1b
355		355
356	2:	356	2:
357		357
358	mov %cx, %bx	358	mov %cx, %bx
359	or $0xc000, %bx	359	or $0xc000, %bx
360	push %di	360	push %di
361	mov $VESA_SET_MODE, %ax	361	mov $VESA_SET_MODE, %ax
362	int $0x10	362	int $0x10
363		363
364	pop %di	364	pop %di
365	cmp $VESA_OK, %al	365	cmp $VESA_OK, %al
366	jnz 0f	366	jnz 0f
367		367
368	mov VESA_MODE_PHADDR_OFFSET(%di), %esi	368	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
369	mov VESA_MODE_WIDTH_OFFSET(%di), %ax	369	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
370	shl $16, %eax	370	shl $16, %eax
371	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax	371	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
372	mov VESA_MODE_BPP_OFFSET(%di), %bl	372	mov VESA_MODE_BPP_OFFSET(%di), %bl
373	xor %bh, %bh	373	xor %bh, %bh
374	shl $16, %ebx	374	shl $16, %ebx
375	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx	375	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
376	mov %eax, %edi	376	mov %eax, %edi
377		377
378	8:	378	8:
379		379
380	mov %cr0, %eax	380	mov %cr0, %eax
381	or $1, %eax	381	or $1, %eax
382	mov %eax,%cr0	382	mov %eax, %cr0
383		383
384	jmp 9f	384	jmp 9f
385	9:	385	9:
386		386
387	ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)	387	ljmpl $KTEXT, $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
388		388
389	0:# No prefered mode found	389	0:# No prefered mode found
390	mov $0x111, %cx	390	mov $0x111, %cx
391	push %di	391	push %di
392	push %cx	392	push %cx
393	mov $VESA_GET_MODE_INFO, %ax	393	mov $VESA_GET_MODE_INFO, %ax
394	int $0x10	394	int $0x10
395		395
396	pop %cx	396	pop %cx
397	pop %di	397	pop %di
398	cmp $VESA_OK, %al	398	cmp $VESA_OK, %al
399	jnz 1f	399	jnz 1f
400	jz 2b # Force relative jump	400	jz 2b # Force relative jump
401		401
402	1:	402	1:
403	mov $0x0003, %ax	403	mov $0x0003, %ax
404	int $0x10	404	int $0x10
405	mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA	405	mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA
406	xor %ax, %ax	406	xor %ax, %ax
407	jz 8b # Force relative jump	407	jz 8b # Force relative jump
408		408
409		409
410	.code32	410	.code32
411	vesa_init_protect:	411	vesa_init_protect:
412	popl %esp	412	popl %esp
413		413
414	movw $KDATA, %cx	414	movw $KDATA, %cx
415	movw %cx, %es	415	movw %cx, %es
416	movw %cx, %fs	416	movw %cx, %fs
417	movw %cx, %gs	417	movw %cx, %gs
418	movw %cx, %ds # kernel data + stack	418	movw %cx, %ds # kernel data + stack
419	movw %cx, %ss	419	movw %cx, %ss
420		420
421	jmpl $KTEXT, $vesa_meeting_point	421	jmpl $KTEXT, $vesa_meeting_point
422		422
423	.align 4	423	.align 4
424	e_vesa_init:	424	e_vesa_init:
425	#endif	425	#endif
426		426
427	.section K_DATA_START, "aw", @progbits	427	.section K_DATA_START, "aw", @progbits
428		428
429	.align 4096	429	.align 4096
430	page_directory:	430	page_directory:
431	.space 4096, 0	431	.space 4096, 0
432		432

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia32/src/boot/boot.S @ 1639 – Rev 1639 → 1641