WebSVN – HelenOS – Diff – /trunk/kernel/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"
 
.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 $selector(KDATA_DES), %cx
	movw %cx, %es
	movw %cx, %fs
	movw %cx, %gs
	movw %cx, %ds					# kernel data + stack
	movw %cx, %ss
	
	jmpl $selector(KTEXT_DES), $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 $selector(KTEXT_DES), $(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 $selector(KDATA_DES), %cx
	movw %cx, %es
	movw %cx, %fs
	movw %cx, %gs
	movw %cx, %ds					# kernel data + stack
	movw %cx, %ss
	
	jmpl $selector(KTEXT_DES), $vesa_meeting_point
 
.align 4
e_vesa_init:
#endif	
 
.section K_DATA_START, "aw", @progbits
 
.align 4096
page_directory:
	.space 4096, 0
 

Rev 1811	Rev 2071
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	.code32	39	.code32
40	.align 4	40	.align 4
41	.global multiboot_image_start	41	.global multiboot_image_start
42	multiboot_header:	42	multiboot_header:
43	.long MULTIBOOT_HEADER_MAGIC	43	.long MULTIBOOT_HEADER_MAGIC
44	.long MULTIBOOT_HEADER_FLAGS	44	.long MULTIBOOT_HEADER_FLAGS
45	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum	45	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum
46	.long multiboot_header	46	.long multiboot_header
47	.long unmapped_ktext_start	47	.long unmapped_ktext_start
48	.long 0	48	.long 0
49	.long 0	49	.long 0
50	.long multiboot_image_start	50	.long multiboot_image_start
51		51
52	multiboot_image_start:	52	multiboot_image_start:
53	movl $START_STACK, %esp # initialize stack pointer	53	movl $START_STACK, %esp # initialize stack pointer
54	lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register	54	lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register
55		55
56	movw $selector(KDATA_DES), %cx	56	movw $selector(KDATA_DES), %cx
57	movw %cx, %es	57	movw %cx, %es
58	movw %cx, %fs	58	movw %cx, %fs
59	movw %cx, %gs	59	movw %cx, %gs
60	movw %cx, %ds # kernel data + stack	60	movw %cx, %ds # kernel data + stack
61	movw %cx, %ss	61	movw %cx, %ss
62		62
63	jmpl $selector(KTEXT_DES), $multiboot_meeting_point	63	jmpl $selector(KTEXT_DES), $multiboot_meeting_point
64	multiboot_meeting_point:	64	multiboot_meeting_point:
65		65
66	pushl %ebx # save parameters from GRUB	66	pushl %ebx # save parameters from GRUB
67	pushl %eax	67	pushl %eax
68		68
69	#ifdef CONFIG_FB	69	#ifdef CONFIG_FB
70	mov $vesa_init, %esi	70	mov $vesa_init, %esi
71	mov $VESA_INIT_SEGMENT << 4, %edi	71	mov $VESA_INIT_SEGMENT << 4, %edi
72	mov $e_vesa_init - vesa_init, %ecx	72	mov $e_vesa_init - vesa_init, %ecx
73	cld	73	cld
74	rep movsb	74	rep movsb
75		75
76	mov $VESA_INIT_SEGMENT << 4, %edi	76	mov $VESA_INIT_SEGMENT << 4, %edi
77	jmpl %edi	77	jmpl %edi
78		78
79	vesa_meeting_point:	79	vesa_meeting_point:
80		80
81	mov %esi, KA2PA(vesa_ph_addr)	81	mov %esi, KA2PA(vesa_ph_addr)
82	mov %di, KA2PA(vesa_height)	82	mov %di, KA2PA(vesa_height)
83	shr $16, %edi	83	shr $16, %edi
84	mov %di, KA2PA(vesa_width)	84	mov %di, KA2PA(vesa_width)
85	mov %bx, KA2PA(vesa_scanline)	85	mov %bx, KA2PA(vesa_scanline)
86	shr $16, %ebx	86	shr $16, %ebx
87	mov %bx, KA2PA(vesa_bpp)	87	mov %bx, KA2PA(vesa_bpp)
88	#endif	88	#endif
89		89
90	call map_kernel # map kernel and turn paging on	90	call map_kernel # map kernel and turn paging on
91		91
92	popl %eax	92	popl %eax
93	popl %ebx	93	popl %ebx
94	cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature	94	cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature
95	je valid_boot	95	je valid_boot
96		96
97	xorl %ecx, %ecx # no memory size or map available	97	xorl %ecx, %ecx # no memory size or map available
98	movl %ecx, e801memorysize	98	movl %ecx, e801memorysize
99	movl %ecx, e820counter	99	movl %ecx, e820counter
100		100
101	jmp invalid_boot	101	jmp invalid_boot
102		102
103	valid_boot:	103	valid_boot:
104		104
105	movl (%ebx), %eax # ebx = physical address of struct multiboot_info	105	movl (%ebx), %eax # ebx = physical address of struct multiboot_info
106		106
107	bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)	107	bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid)
108	jc mem_valid	108	jc mem_valid
109		109
110	xorl %ecx, %ecx	110	xorl %ecx, %ecx
111	jmp mem_invalid	111	jmp mem_invalid
112		112
113	mem_valid:	113	mem_valid:
114	movl 4(%ebx), %ecx # mbi->mem_lower	114	movl 4(%ebx), %ecx # mbi->mem_lower
115	addl 8(%ebx), %ecx # mbi->mem_upper	115	addl 8(%ebx), %ecx # mbi->mem_upper
116		116
117	mem_invalid:	117	mem_invalid:
118	movl %ecx, e801memorysize	118	movl %ecx, e801memorysize
119		119
120	bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)	120	bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid)
121	jc mods_valid	121	jc mods_valid
122		122
123	xorl %ecx, %ecx	123	xorl %ecx, %ecx
124	movl %ecx, init	124	movl %ecx, init
125	jmp mods_end	125	jmp mods_end
126		126
127	mods_valid:	127	mods_valid:
128		128
129	movl 20(%ebx), %ecx # mbi->mods_count	129	movl 20(%ebx), %ecx # mbi->mods_count
130	movl %ecx, init	130	movl %ecx, init
131		131
132	cmpl $0, %ecx	132	cmpl $0, %ecx
133	je mods_end	133	je mods_end
134		134
135	movl 24(%ebx), %esi # mbi->mods_addr	135	movl 24(%ebx), %esi # mbi->mods_addr
136	movl $init, %edi	136	movl $init, %edi
137		137
138	mods_loop:	138	mods_loop:
139		139
140	movl 0(%esi), %edx # mods->mod_start	140	movl 0(%esi), %edx # mods->mod_start
141	addl $0x80000000, %edx	141	addl $0x80000000, %edx
142	movl %edx, 4(%edi)	142	movl %edx, 4(%edi)
143		143
144	movl 4(%esi), %edx	144	movl 4(%esi), %edx
145	subl 0(%esi), %edx # mods->mod_end - mods->mod_start	145	subl 0(%esi), %edx # mods->mod_end - mods->mod_start
146	movl %edx, 8(%edi)	146	movl %edx, 8(%edi)
147		147
148	addl $16, %esi	148	addl $16, %esi
149	addl $8 , %edi	149	addl $8 , %edi
150		150
151	loop mods_loop	151	loop mods_loop
152		152
153	mods_end:	153	mods_end:
154		154
155	bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid)	155	bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid)
156	jc mmap_valid	156	jc mmap_valid
157		157
158	xorl %edx, %edx	158	xorl %edx, %edx
159	jmp mmap_invalid	159	jmp mmap_invalid
160		160
161	mmap_valid:	161	mmap_valid:
162	movl 44(%ebx), %ecx # mbi->mmap_length	162	movl 44(%ebx), %ecx # mbi->mmap_length
163	movl 48(%ebx), %esi # mbi->mmap_addr	163	movl 48(%ebx), %esi # mbi->mmap_addr
164	movl $e820table, %edi	164	movl $e820table, %edi
165	xorl %edx, %edx	165	xorl %edx, %edx
166		166
167	mmap_loop:	167	mmap_loop:
168	cmpl $0, %ecx	168	cmpl $0, %ecx
169	jle mmap_end	169	jle mmap_end
170		170
171	movl 4(%esi), %eax # mmap->base_addr_low	171	movl 4(%esi), %eax # mmap->base_addr_low
172	movl %eax, (%edi)	172	movl %eax, (%edi)
173		173
174	movl 8(%esi), %eax # mmap->base_addr_high	174	movl 8(%esi), %eax # mmap->base_addr_high
175	movl %eax, 4(%edi)	175	movl %eax, 4(%edi)
176		176
177	movl 12(%esi), %eax # mmap->length_low	177	movl 12(%esi), %eax # mmap->length_low
178	movl %eax, 8(%edi)	178	movl %eax, 8(%edi)
179		179
180	movl 16(%esi), %eax # mmap->length_high	180	movl 16(%esi), %eax # mmap->length_high
181	movl %eax, 12(%edi)	181	movl %eax, 12(%edi)
182		182
183	movl 20(%esi), %eax # mmap->type	183	movl 20(%esi), %eax # mmap->type
184	movl %eax, 16(%edi)	184	movl %eax, 16(%edi)
185		185
186	movl (%esi), %eax # mmap->size	186	movl (%esi), %eax # mmap->size
187	addl $0x4, %eax	187	addl $0x4, %eax
188	addl %eax, %esi	188	addl %eax, %esi
189	subl %eax, %ecx	189	subl %eax, %ecx
190	addl $MEMMAP_E820_RECORD_SIZE, %edi	190	addl $MEMMAP_E820_RECORD_SIZE, %edi
191	incl %edx	191	incl %edx
192	jmp mmap_loop	192	jmp mmap_loop
193		193
194	mmap_end:	194	mmap_end:
195		195
196	mmap_invalid:	196	mmap_invalid:
197	movl %edx, e820counter	197	movl %edx, e820counter
198		198
199	invalid_boot:	199	invalid_boot:
200		200
201	#ifdef CONFIG_SMP	201	#ifdef CONFIG_SMP
202		202
203	# copy AP bootstrap routines below 1 MB	203	# copy AP bootstrap routines below 1 MB
204		204
205	movl $BOOT_OFFSET, %esi	205	movl $BOOT_OFFSET, %esi
206	movl $AP_BOOT_OFFSET, %edi	206	movl $AP_BOOT_OFFSET, %edi
207	movl $_hardcoded_unmapped_size, %ecx	207	movl $_hardcoded_unmapped_size, %ecx
208	cld	208	cld
209	rep movsb	209	rep movsb
210		210
211	#endif	211	#endif
212		212
213	call main_bsp # never returns	213	call main_bsp # never returns
214		214
215	cli	215	cli
216	hlt	216	hlt
217		217
218	.global map_kernel	218	.global map_kernel
219	map_kernel:	219	map_kernel:
220	#	220	#
221	# Here we setup mapping for both the unmapped and mapped sections of the kernel.	221	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
222	# For simplicity, we map the entire 4G space.	222	# For simplicity, we map the entire 4G space.
223	#	223	#
224	movl %cr4, %ecx	224	movl %cr4, %ecx
225	orl $(1<<4), %ecx	225	orl $(1<<4), %ecx
226	movl %ecx, %cr4 # turn PSE on	226	movl %ecx, %cr4 # turn PSE on
227		227
228	movl $(page_directory+0), %esi	228	movl $(page_directory+0), %esi
229	movl $(page_directory+2048), %edi	229	movl $(page_directory+2048), %edi
230	xorl %ecx, %ecx	230	xorl %ecx, %ecx
231	xorl %ebx, %ebx	231	xorl %ebx, %ebx
232	0:	232	0:
233	movl $((1<<7)\|(1<<0)), %eax	233	movl $((1<<7)\|(1<<0)), %eax
234	orl %ebx, %eax	234	orl %ebx, %eax
235	movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx4M => 0x00000000+%ecx4M	235	movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx4M => 0x00000000+%ecx4M
236	movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx4M => 0x00000000+%ecx4M	236	movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx4M => 0x00000000+%ecx4M
237	addl $(410241024), %ebx	237	addl $(410241024), %ebx
238		238
239	incl %ecx	239	incl %ecx
240	cmpl $512, %ecx	240	cmpl $512, %ecx
241	jl 0b	241	jl 0b
242		242
243	movl %esi, %cr3	243	movl %esi, %cr3
244		244
245	# turn paging on	245	# turn paging on
246	movl %cr0, %ebx	246	movl %cr0, %ebx
247	orl $(1<<31), %ebx	247	orl $(1<<31), %ebx
248	movl %ebx, %cr0	248	movl %ebx, %cr0
249	ret	249	ret
250		250
251	#ifdef CONFIG_FB	251	#ifdef CONFIG_FB
252	vesa_init:	252	vesa_init:
253	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init	253	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
254		254
255	.code16	255	.code16
256	vesa_init_real:	256	vesa_init_real:
257		257
258	mov %cr0, %eax	258	mov %cr0, %eax
259	and $~1, %eax	259	and $~1, %eax
260	mov %eax, %cr0	260	mov %eax, %cr0
261		261
262	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init	262	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
263		263
264	vesa_init_real2:	264	vesa_init_real2:
265		265
266	mov $VESA_INIT_SEGMENT, %bx	266	mov $VESA_INIT_SEGMENT, %bx
267		267
268	mov %bx, %es	268	mov %bx, %es
269	mov %bx, %fs	269	mov %bx, %fs
270	mov %bx, %gs	270	mov %bx, %gs
271	mov %bx, %ds	271	mov %bx, %ds
272	mov %bx, %ss	272	mov %bx, %ss
273		273
274	movl %esp, %eax	274	movl %esp, %eax
275	movl $0x0000fffc, %esp	275	movl $0x0000fffc, %esp
276	movl $0x0000fffc, %ebp	276	movl $0x0000fffc, %ebp
277	pushl %eax	277	pushl %eax
278		278
279	#define VESA_INFO_SIZE 1024	279	#define VESA_INFO_SIZE 1024
280		280
281	#define VESA_MODE_LIST_PTR_OFFSET 14	281	#define VESA_MODE_LIST_PTR_OFFSET 14
282	#define VESA_MODE_WIDTH_OFFSET 18	282	#define VESA_MODE_WIDTH_OFFSET 18
283	#define VESA_MODE_HEIGHT_OFFSET 20	283	#define VESA_MODE_HEIGHT_OFFSET 20
284	#define VESA_MODE_BPP_OFFSET 25	284	#define VESA_MODE_BPP_OFFSET 25
285	#define VESA_MODE_SCANLINE_OFFSET 16	285	#define VESA_MODE_SCANLINE_OFFSET 16
286	#define VESA_MODE_PHADDR_OFFSET 40	286	#define VESA_MODE_PHADDR_OFFSET 40
287		287
288	#define VESA_END_OF_MODES 0xffff	288	#define VESA_END_OF_MODES 0xffff
289		289
290	#define VESA_OK 0x4f	290	#define VESA_OK 0x4f
291		291
292	#define VESA_GET_INFO 0x4f00	292	#define VESA_GET_INFO 0x4f00
293	#define VESA_GET_MODE_INFO 0x4f01	293	#define VESA_GET_MODE_INFO 0x4f01
294	#define VESA_SET_MODE 0x4f02	294	#define VESA_SET_MODE 0x4f02
295		295
296	#define CONFIG_VESA_BPP_a 255	296	#define CONFIG_VESA_BPP_a 255
297		297
298	#if CONFIG_VESA_BPP == 24	298	#if CONFIG_VESA_BPP == 24
299	#undef CONFIG_VESA_BPP_a	299	#undef CONFIG_VESA_BPP_a
300	#define CONFIG_VESA_BPP_a 32	300	#define CONFIG_VESA_BPP_a 32
301	#endif	301	#endif
302		302
303	mov $VESA_GET_INFO, %ax	303	mov $VESA_GET_INFO, %ax
304	mov $e_vesa_init - vesa_init, %di	304	mov $e_vesa_init - vesa_init, %di
305	push %di	305	push %di
306	int $0x10	306	int $0x10
307		307
308	pop %di	308	pop %di
309	cmp $VESA_OK, %al	309	cmp $VESA_OK, %al
310	jnz 0f	310	jnz 0f
311		311
312	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si	312	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
313	mov %si, %gs	313	mov %si, %gs
314	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si	314	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
315		315
316	add $VESA_INFO_SIZE, %di	316	add $VESA_INFO_SIZE, %di
317		317
318	1:# Try next mode	318	1:# Try next mode
319	mov %gs:(%si), %cx	319	mov %gs:(%si), %cx
320	cmp $VESA_END_OF_MODES, %cx	320	cmp $VESA_END_OF_MODES, %cx
321	jz 0f	321	jz 0f
322		322
323	inc %si	323	inc %si
324	inc %si	324	inc %si
325	push %cx	325	push %cx
326	push %di	326	push %di
327	push %si	327	push %si
328	mov $VESA_GET_MODE_INFO, %ax	328	mov $VESA_GET_MODE_INFO, %ax
329	int $0x10	329	int $0x10
330		330
331	pop %si	331	pop %si
332	pop %di	332	pop %di
333	pop %cx	333	pop %cx
334	cmp $VESA_OK, %al	334	cmp $VESA_OK, %al
335	jnz 0f	335	jnz 0f
336		336
337	mov $CONFIG_VESA_WIDTH, %ax	337	mov $CONFIG_VESA_WIDTH, %ax
338	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax	338	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
339	jnz 1b	339	jnz 1b
340		340
341	mov $CONFIG_VESA_HEIGHT,%ax	341	mov $CONFIG_VESA_HEIGHT,%ax
342	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax	342	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
343	jnz 1b	343	jnz 1b
344		344
345	mov $CONFIG_VESA_BPP, %al	345	mov $CONFIG_VESA_BPP, %al
346	cmp VESA_MODE_BPP_OFFSET(%di), %al	346	cmp VESA_MODE_BPP_OFFSET(%di), %al
347	jz 2f	347	jz 2f
348		348
349	mov $CONFIG_VESA_BPP_a, %al	349	mov $CONFIG_VESA_BPP_a, %al
350	cmp VESA_MODE_BPP_OFFSET(%di), %al	350	cmp VESA_MODE_BPP_OFFSET(%di), %al
351	jnz 1b	351	jnz 1b
352		352
353	2:	353	2:
354		354
355	mov %cx, %bx	355	mov %cx, %bx
356	or $0xc000, %bx	356	or $0xc000, %bx
357	push %di	357	push %di
358	mov $VESA_SET_MODE, %ax	358	mov $VESA_SET_MODE, %ax
359	int $0x10	359	int $0x10
360		360
361	pop %di	361	pop %di
362	cmp $VESA_OK, %al	362	cmp $VESA_OK, %al
363	jnz 0f	363	jnz 0f
364		364
365	mov VESA_MODE_PHADDR_OFFSET(%di), %esi	365	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
366	mov VESA_MODE_WIDTH_OFFSET(%di), %ax	366	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
367	shl $16, %eax	367	shl $16, %eax
368	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax	368	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
369	mov VESA_MODE_BPP_OFFSET(%di), %bl	369	mov VESA_MODE_BPP_OFFSET(%di), %bl
370	xor %bh, %bh	370	xor %bh, %bh
371	shl $16, %ebx	371	shl $16, %ebx
372	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx	372	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
373	mov %eax, %edi	373	mov %eax, %edi
374		374
375	8:	375	8:
376		376
377	mov %cr0, %eax	377	mov %cr0, %eax
378	or $1, %eax	378	or $1, %eax
379	mov %eax, %cr0	379	mov %eax, %cr0
380		380
381	jmp 9f	381	jmp 9f
382	9:	382	9:
383		383
384	ljmpl $selector(KTEXT_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)	384	ljmpl $selector(KTEXT_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
385		385
386	0:# No prefered mode found	386	0:# No prefered mode found
387	mov $0x111, %cx	387	mov $0x111, %cx
388	push %di	388	push %di
389	push %cx	389	push %cx
390	mov $VESA_GET_MODE_INFO, %ax	390	mov $VESA_GET_MODE_INFO, %ax
391	int $0x10	391	int $0x10
392		392
393	pop %cx	393	pop %cx
394	pop %di	394	pop %di
395	cmp $VESA_OK, %al	395	cmp $VESA_OK, %al
396	jnz 1f	396	jnz 1f
397	jz 2b # Force relative jump	397	jz 2b # Force relative jump
398		398
399	1:	399	1:
400	mov $0x0003, %ax	400	mov $0x0003, %ax
401	int $0x10	401	int $0x10
402	mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA	402	mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA
403	xor %ax, %ax	403	xor %ax, %ax
404	jz 8b # Force relative jump	404	jz 8b # Force relative jump
405		405
406		406
407	.code32	407	.code32
408	vesa_init_protect:	408	vesa_init_protect:
409	popl %esp	409	popl %esp
410		410
411	movw $selector(KDATA_DES), %cx	411	movw $selector(KDATA_DES), %cx
412	movw %cx, %es	412	movw %cx, %es
413	movw %cx, %fs	413	movw %cx, %fs
414	movw %cx, %gs	414	movw %cx, %gs
415	movw %cx, %ds # kernel data + stack	415	movw %cx, %ds # kernel data + stack
416	movw %cx, %ss	416	movw %cx, %ss
417		417
418	jmpl $selector(KTEXT_DES), $vesa_meeting_point	418	jmpl $selector(KTEXT_DES), $vesa_meeting_point
419		419
420	.align 4	420	.align 4
421	e_vesa_init:	421	e_vesa_init:
422	#endif	422	#endif
423		423
424	.section K_DATA_START, "aw", @progbits	424	.section K_DATA_START, "aw", @progbits
425		425
426	.align 4096	426	.align 4096
427	page_directory:	427	page_directory:
428	.space 4096, 0	428	.space 4096, 0
429		429

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ia32/src/boot/boot.S – Rev 1811 → 2071