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:
	cld
	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:
	
	movl %eax, grub_eax					# save parameters from GRUB
	movl %ebx, grub_ebx
	
	xorl %eax, %eax  
 	cpuid
 	cmp $0x0, %eax						# any function > 0?
	jbe pse_unsupported
	movl $0x1, %eax						# Basic function code 1
	cpuid
	bt $3, %edx							# Test if PSE is supported
	jc pse_supported
 
	pse_unsupported:
		movl $pse_msg, %esi
		jmp error_halt
	
	pse_supported:
	
#ifdef CONFIG_FB
	mov $vesa_init, %esi
	mov $VESA_INIT_SEGMENT << 4, %edi
	mov $e_vesa_init - vesa_init, %ecx
	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
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
	# ia32_cboot(grub_eax, grub_ebx)
	pushl grub_ebx
	pushl grub_eax
	call ia32_cboot		# Does not return.
 
	# Not reached.
 
 
 
	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							# turn PSE on
	andl $(~(1 << 5)), %ecx						# turn PAE off
	movl %ecx, %cr4
	
	movl $(page_directory + 0), %esi
	movl $(page_directory + 2048), %edi
	xorl %ecx, %ecx
	xorl %ebx, %ebx
0:
	movl $((1 << 7) | (1 << 1) | (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
	
	movl %cr0, %ebx
	orl $(1 << 31), %ebx						# turn paging on
	movl %ebx, %cr0
	ret
 
# Print string from %esi to EGA display (in red) and halt
error_halt:
	movl $0xb8000, %edi						# base of EGA text mode memory
	xorl %eax, %eax
	
	movw $0x3d4, %dx						# read bits 8 - 15 of the cursor address
	movb $0xe, %al
	outb %al, %dx
	
	movw $0x3d5, %dx
	inb %dx, %al
	shl $8, %ax
	
	movw $0x3d4, %dx						# read bits 0 - 7 of the cursor address
	movb $0xf, %al
	outb %al, %dx
	
	movw $0x3d5, %dx
	inb %dx, %al
	
	cmp $1920, %ax
	jbe cursor_ok
		movw $1920, %ax						# sanity check for the cursor on the last line
	cursor_ok:
	
	movw %ax, %bx
	shl $1, %eax
	addl %eax, %edi
	
	movw $0x0c00, %ax						# black background, light red foreground
	
	ploop:
		lodsb
		cmp $0, %al
		je ploop_end
		stosw
		inc %bx	
		jmp ploop
	ploop_end:
	
	movw $0x3d4, %dx						# write bits 8 - 15 of the cursor address
	movb $0xe, %al
	outb %al, %dx
	
	movw $0x3d5, %dx
	movb %bh, %al
	outb %al, %dx
	
	movw $0x3d4, %dx						# write bits 0 - 7 of the cursor address
	movb $0xf, %al
	outb %al, %dx
	
	movw $0x3d5, %dx
	movb %bl, %al
	outb %al, %dx
		
	cli
	hlt
 
#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_ATTRIBUTES_OFFSET 0
#define VESA_MODE_LIST_PTR_OFFSET 14
#define VESA_MODE_SCANLINE_OFFSET 16
#define VESA_MODE_WIDTH_OFFSET 18
#define VESA_MODE_HEIGHT_OFFSET 20
#define VESA_MODE_BPP_OFFSET 25
#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 VESA_SET_PALETTE 0x4f09
 
#if CONFIG_VESA_BPP == 24
#define CONFIG_VESA_BPP_VARIANT 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
 
#ifdef CONFIG_VESA_BPP_VARIANT
	jz 2f
	
	mov $CONFIG_VESA_BPP_VARIANT, %al
	cmp VESA_MODE_BPP_OFFSET(%di), %al
#endif
	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
 
#if CONFIG_VESA_BPP == 8
	
	# Set 3:2:3 VGA palette
	
	mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax
	push %di
	mov $vga323 - vesa_init, %di
	mov $0x100, %ecx
	
	bt $5, %ax							# Test if VGA compatible registers are present
	jnc vga_compat
		
		# Try VESA routine to set palette
		
		mov $VESA_SET_PALETTE, %ax
		xor %bl, %bl
		xor %dx, %dx
		int $0x10
		
		cmp $0x00, %ah
		je vga_not_compat
	
	vga_compat:
		
		# Try VGA registers to set palette
		
		movw $0x3c6, %dx						# Set palette mask
		movb $0xff, %al
		outb %al, %dx
		
		movw $0x3c8, %dx						# First index to set
		xor %al, %al
		outb %al, %dx
		
		movw $0x3c9, %dx						# Data port
		vga_loop:
			movb %es:2(%di), %al
			outb %al, %dx
			
			movb %es:1(%di), %al
			outb %al, %dx
			
			movb %es:(%di), %al
			outb %al, %dx
			
			addw $4, %di
			loop vga_loop
		
	vga_not_compat:
	
	pop %di
	
#endif
	
	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
 
vga323:
#include "vga323.pal"
 
.code32
vesa_init_protect:
	movw $selector(KDATA_DES), %cx
	movw %cx, %es
	movw %cx, %fs
	movw %cx, %gs
	movw %cx, %ds					# kernel data + stack
	movw %cx, %ss
	
	movl $START_STACK, %esp			# initialize stack pointer
 
	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
 
grub_eax:
	.long 0
 
grub_ebx:
	.long 0
 
pse_msg:
	.asciz "Page Size Extension not supported. System halted."
 

Rev 3984	Rev 3985
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	cld	53	cld
54	movl $START_STACK, %esp # initialize stack pointer	54	movl $START_STACK, %esp # initialize stack pointer
55	lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register	55	lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register
56		56
57	movw $selector(KDATA_DES), %cx	57	movw $selector(KDATA_DES), %cx
58	movw %cx, %es	58	movw %cx, %es
59	movw %cx, %fs	59	movw %cx, %fs
60	movw %cx, %gs	60	movw %cx, %gs
61	movw %cx, %ds # kernel data + stack	61	movw %cx, %ds # kernel data + stack
62	movw %cx, %ss	62	movw %cx, %ss
63		63
64	jmpl $selector(KTEXT_DES), $multiboot_meeting_point	64	jmpl $selector(KTEXT_DES), $multiboot_meeting_point
65	multiboot_meeting_point:	65	multiboot_meeting_point:
66		66
67	movl %eax, grub_eax # save parameters from GRUB	67	movl %eax, grub_eax # save parameters from GRUB
68	movl %ebx, grub_ebx	68	movl %ebx, grub_ebx
69		69
70	xorl %eax, %eax	70	xorl %eax, %eax
71	cpuid	71	cpuid
72	cmp $0x0, %eax # any function > 0?	72	cmp $0x0, %eax # any function > 0?
73	jbe pse_unsupported	73	jbe pse_unsupported
74	movl $0x1, %eax # Basic function code 1	74	movl $0x1, %eax # Basic function code 1
75	cpuid	75	cpuid
76	bt $3, %edx # Test if PSE is supported	76	bt $3, %edx # Test if PSE is supported
77	jc pse_supported	77	jc pse_supported
78		78
79	pse_unsupported:	79	pse_unsupported:
80	movl $pse_msg, %esi	80	movl $pse_msg, %esi
81	jmp error_halt	81	jmp error_halt
82		82
83	pse_supported:	83	pse_supported:
84		84
85	#ifdef CONFIG_FB	85	#ifdef CONFIG_FB
86	mov $vesa_init, %esi	86	mov $vesa_init, %esi
87	mov $VESA_INIT_SEGMENT << 4, %edi	87	mov $VESA_INIT_SEGMENT << 4, %edi
88	mov $e_vesa_init - vesa_init, %ecx	88	mov $e_vesa_init - vesa_init, %ecx
89	rep movsb	89	rep movsb
90		90
91	mov $VESA_INIT_SEGMENT << 4, %edi	91	mov $VESA_INIT_SEGMENT << 4, %edi
92	jmpl *%edi	92	jmpl *%edi
93		93
94	vesa_meeting_point:	94	vesa_meeting_point:
95		95
96	mov %esi, KA2PA(vesa_ph_addr)	96	mov %esi, KA2PA(vesa_ph_addr)
97	mov %di, KA2PA(vesa_height)	97	mov %di, KA2PA(vesa_height)
98	shr $16, %edi	98	shr $16, %edi
99	mov %di, KA2PA(vesa_width)	99	mov %di, KA2PA(vesa_width)
100	mov %bx, KA2PA(vesa_scanline)	100	mov %bx, KA2PA(vesa_scanline)
101	shr $16, %ebx	101	shr $16, %ebx
102	mov %bx, KA2PA(vesa_bpp)	102	mov %bx, KA2PA(vesa_bpp)
103	#endif	103	#endif
104		104
105	call map_kernel # map kernel and turn paging on	105	call map_kernel # map kernel and turn paging on
106		106
107	movl grub_eax, %eax	-
108	movl grub_ebx, %ebx	-
109	cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature	-
110	je valid_boot	-
111		-
112	xorl %ecx, %ecx # no memory map available	-
113	movl %ecx, e820counter	-
114		-
115	jmp invalid_boot	-
116		-
117	valid_boot:	-
118		-
119	movl grub_eax, %eax	-
120	movl grub_ebx, %ebx	-
121		-
122	# ia32_boot(grub_eax, grub_ebx)	107	# ia32_cboot(grub_eax, grub_ebx)
123	pushl %ebx	108	pushl grub_ebx
124	pushl %eax	109	pushl grub_eax
125	call ia32_cboot # Does not return.	110	call ia32_cboot # Does not return.
126		111
127	# Not reached.	112	# Not reached.
128		113
129	invalid_boot:	-
130		-
131	cli	114	cli
132	hlt	115	hlt
133		116
134	.global map_kernel	117	.global map_kernel
135	map_kernel:	118	map_kernel:
136	#	119	#
137	# Here we setup mapping for both the unmapped and mapped sections of the kernel.	120	# Here we setup mapping for both the unmapped and mapped sections of the kernel.
138	# For simplicity, we map the entire 4G space.	121	# For simplicity, we map the entire 4G space.
139	#	122	#
140	movl %cr4, %ecx	123	movl %cr4, %ecx
141	orl $(1 << 4), %ecx # turn PSE on	124	orl $(1 << 4), %ecx # turn PSE on
142	andl $(~(1 << 5)), %ecx # turn PAE off	125	andl $(~(1 << 5)), %ecx # turn PAE off
143	movl %ecx, %cr4	126	movl %ecx, %cr4
144		127
145	movl $(page_directory + 0), %esi	128	movl $(page_directory + 0), %esi
146	movl $(page_directory + 2048), %edi	129	movl $(page_directory + 2048), %edi
147	xorl %ecx, %ecx	130	xorl %ecx, %ecx
148	xorl %ebx, %ebx	131	xorl %ebx, %ebx
149	0:	132	0:
150	movl $((1 << 7) \| (1 << 1) \| (1 << 0)), %eax	133	movl $((1 << 7) \| (1 << 1) \| (1 << 0)), %eax
151	orl %ebx, %eax	134	orl %ebx, %eax
152	movl %eax, (%esi, %ecx, 4) # mapping 0x00000000 + %ecx * 4M => 0x00000000 + %ecx * 4M	135	movl %eax, (%esi, %ecx, 4) # mapping 0x00000000 + %ecx * 4M => 0x00000000 + %ecx * 4M
153	movl %eax, (%edi, %ecx, 4) # mapping 0x80000000 + %ecx * 4M => 0x00000000 + %ecx * 4M	136	movl %eax, (%edi, %ecx, 4) # mapping 0x80000000 + %ecx * 4M => 0x00000000 + %ecx * 4M
154	addl $(4 * 1024 * 1024), %ebx	137	addl $(4 * 1024 * 1024), %ebx
155		138
156	incl %ecx	139	incl %ecx
157	cmpl $512, %ecx	140	cmpl $512, %ecx
158	jl 0b	141	jl 0b
159		142
160	movl %esi, %cr3	143	movl %esi, %cr3
161		144
162	movl %cr0, %ebx	145	movl %cr0, %ebx
163	orl $(1 << 31), %ebx # turn paging on	146	orl $(1 << 31), %ebx # turn paging on
164	movl %ebx, %cr0	147	movl %ebx, %cr0
165	ret	148	ret
166		149
167	# Print string from %esi to EGA display (in red) and halt	150	# Print string from %esi to EGA display (in red) and halt
168	error_halt:	151	error_halt:
169	movl $0xb8000, %edi # base of EGA text mode memory	152	movl $0xb8000, %edi # base of EGA text mode memory
170	xorl %eax, %eax	153	xorl %eax, %eax
171		154
172	movw $0x3d4, %dx # read bits 8 - 15 of the cursor address	155	movw $0x3d4, %dx # read bits 8 - 15 of the cursor address
173	movb $0xe, %al	156	movb $0xe, %al
174	outb %al, %dx	157	outb %al, %dx
175		158
176	movw $0x3d5, %dx	159	movw $0x3d5, %dx
177	inb %dx, %al	160	inb %dx, %al
178	shl $8, %ax	161	shl $8, %ax
179		162
180	movw $0x3d4, %dx # read bits 0 - 7 of the cursor address	163	movw $0x3d4, %dx # read bits 0 - 7 of the cursor address
181	movb $0xf, %al	164	movb $0xf, %al
182	outb %al, %dx	165	outb %al, %dx
183		166
184	movw $0x3d5, %dx	167	movw $0x3d5, %dx
185	inb %dx, %al	168	inb %dx, %al
186		169
187	cmp $1920, %ax	170	cmp $1920, %ax
188	jbe cursor_ok	171	jbe cursor_ok
189	movw $1920, %ax # sanity check for the cursor on the last line	172	movw $1920, %ax # sanity check for the cursor on the last line
190	cursor_ok:	173	cursor_ok:
191		174
192	movw %ax, %bx	175	movw %ax, %bx
193	shl $1, %eax	176	shl $1, %eax
194	addl %eax, %edi	177	addl %eax, %edi
195		178
196	movw $0x0c00, %ax # black background, light red foreground	179	movw $0x0c00, %ax # black background, light red foreground
197		180
198	ploop:	181	ploop:
199	lodsb	182	lodsb
200	cmp $0, %al	183	cmp $0, %al
201	je ploop_end	184	je ploop_end
202	stosw	185	stosw
203	inc %bx	186	inc %bx
204	jmp ploop	187	jmp ploop
205	ploop_end:	188	ploop_end:
206		189
207	movw $0x3d4, %dx # write bits 8 - 15 of the cursor address	190	movw $0x3d4, %dx # write bits 8 - 15 of the cursor address
208	movb $0xe, %al	191	movb $0xe, %al
209	outb %al, %dx	192	outb %al, %dx
210		193
211	movw $0x3d5, %dx	194	movw $0x3d5, %dx
212	movb %bh, %al	195	movb %bh, %al
213	outb %al, %dx	196	outb %al, %dx
214		197
215	movw $0x3d4, %dx # write bits 0 - 7 of the cursor address	198	movw $0x3d4, %dx # write bits 0 - 7 of the cursor address
216	movb $0xf, %al	199	movb $0xf, %al
217	outb %al, %dx	200	outb %al, %dx
218		201
219	movw $0x3d5, %dx	202	movw $0x3d5, %dx
220	movb %bl, %al	203	movb %bl, %al
221	outb %al, %dx	204	outb %al, %dx
222		205
223	cli	206	cli
224	hlt	207	hlt
225		208
226	#ifdef CONFIG_FB	209	#ifdef CONFIG_FB
227	vesa_init:	210	vesa_init:
228	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init	211	jmp $selector(VESA_INIT_DES), $vesa_init_real - vesa_init
229		212
230	.code16	213	.code16
231	vesa_init_real:	214	vesa_init_real:
232		215
233	mov %cr0, %eax	216	mov %cr0, %eax
234	and $~1, %eax	217	and $~1, %eax
235	mov %eax, %cr0	218	mov %eax, %cr0
236		219
237	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init	220	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
238		221
239	vesa_init_real2:	222	vesa_init_real2:
240		223
241	mov $VESA_INIT_SEGMENT, %bx	224	mov $VESA_INIT_SEGMENT, %bx
242		225
243	mov %bx, %es	226	mov %bx, %es
244	mov %bx, %fs	227	mov %bx, %fs
245	mov %bx, %gs	228	mov %bx, %gs
246	mov %bx, %ds	229	mov %bx, %ds
247	mov %bx, %ss	230	mov %bx, %ss
248		231
249	movl %esp, %eax	232	movl %esp, %eax
250	movl $0x0000fffc, %esp	233	movl $0x0000fffc, %esp
251	movl $0x0000fffc, %ebp	234	movl $0x0000fffc, %ebp
252	pushl %eax	235	pushl %eax
253		236
254	#define VESA_INFO_SIZE 1024	237	#define VESA_INFO_SIZE 1024
255		238
256	#define VESA_MODE_ATTRIBUTES_OFFSET 0	239	#define VESA_MODE_ATTRIBUTES_OFFSET 0
257	#define VESA_MODE_LIST_PTR_OFFSET 14	240	#define VESA_MODE_LIST_PTR_OFFSET 14
258	#define VESA_MODE_SCANLINE_OFFSET 16	241	#define VESA_MODE_SCANLINE_OFFSET 16
259	#define VESA_MODE_WIDTH_OFFSET 18	242	#define VESA_MODE_WIDTH_OFFSET 18
260	#define VESA_MODE_HEIGHT_OFFSET 20	243	#define VESA_MODE_HEIGHT_OFFSET 20
261	#define VESA_MODE_BPP_OFFSET 25	244	#define VESA_MODE_BPP_OFFSET 25
262	#define VESA_MODE_PHADDR_OFFSET 40	245	#define VESA_MODE_PHADDR_OFFSET 40
263		246
264	#define VESA_END_OF_MODES 0xffff	247	#define VESA_END_OF_MODES 0xffff
265		248
266	#define VESA_OK 0x4f	249	#define VESA_OK 0x4f
267		250
268	#define VESA_GET_INFO 0x4f00	251	#define VESA_GET_INFO 0x4f00
269	#define VESA_GET_MODE_INFO 0x4f01	252	#define VESA_GET_MODE_INFO 0x4f01
270	#define VESA_SET_MODE 0x4f02	253	#define VESA_SET_MODE 0x4f02
271	#define VESA_SET_PALETTE 0x4f09	254	#define VESA_SET_PALETTE 0x4f09
272		255
273	#if CONFIG_VESA_BPP == 24	256	#if CONFIG_VESA_BPP == 24
274	#define CONFIG_VESA_BPP_VARIANT 32	257	#define CONFIG_VESA_BPP_VARIANT 32
275	#endif	258	#endif
276		259
277	mov $VESA_GET_INFO, %ax	260	mov $VESA_GET_INFO, %ax
278	mov $e_vesa_init - vesa_init, %di	261	mov $e_vesa_init - vesa_init, %di
279	push %di	262	push %di
280	int $0x10	263	int $0x10
281		264
282	pop %di	265	pop %di
283	cmp $VESA_OK, %al	266	cmp $VESA_OK, %al
284	jnz 0f	267	jnz 0f
285		268
286	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si	269	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
287	mov %si, %gs	270	mov %si, %gs
288	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si	271	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
289		272
290	add $VESA_INFO_SIZE, %di	273	add $VESA_INFO_SIZE, %di
291		274
292	1:# Try next mode	275	1:# Try next mode
293	mov %gs:(%si), %cx	276	mov %gs:(%si), %cx
294	cmp $VESA_END_OF_MODES, %cx	277	cmp $VESA_END_OF_MODES, %cx
295	jz 0f	278	jz 0f
296		279
297	inc %si	280	inc %si
298	inc %si	281	inc %si
299	push %cx	282	push %cx
300	push %di	283	push %di
301	push %si	284	push %si
302	mov $VESA_GET_MODE_INFO, %ax	285	mov $VESA_GET_MODE_INFO, %ax
303	int $0x10	286	int $0x10
304		287
305	pop %si	288	pop %si
306	pop %di	289	pop %di
307	pop %cx	290	pop %cx
308	cmp $VESA_OK, %al	291	cmp $VESA_OK, %al
309	jnz 0f	292	jnz 0f
310		293
311	mov $CONFIG_VESA_WIDTH, %ax	294	mov $CONFIG_VESA_WIDTH, %ax
312	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax	295	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
313	jnz 1b	296	jnz 1b
314		297
315	mov $CONFIG_VESA_HEIGHT, %ax	298	mov $CONFIG_VESA_HEIGHT, %ax
316	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax	299	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
317	jnz 1b	300	jnz 1b
318		301
319	mov $CONFIG_VESA_BPP, %al	302	mov $CONFIG_VESA_BPP, %al
320	cmp VESA_MODE_BPP_OFFSET(%di), %al	303	cmp VESA_MODE_BPP_OFFSET(%di), %al
321		304
322	#ifdef CONFIG_VESA_BPP_VARIANT	305	#ifdef CONFIG_VESA_BPP_VARIANT
323	jz 2f	306	jz 2f
324		307
325	mov $CONFIG_VESA_BPP_VARIANT, %al	308	mov $CONFIG_VESA_BPP_VARIANT, %al
326	cmp VESA_MODE_BPP_OFFSET(%di), %al	309	cmp VESA_MODE_BPP_OFFSET(%di), %al
327	#endif	310	#endif
328	jnz 1b	311	jnz 1b
329		312
330	2:	313	2:
331		314
332	mov %cx, %bx	315	mov %cx, %bx
333	or $0xc000, %bx	316	or $0xc000, %bx
334	push %di	317	push %di
335	mov $VESA_SET_MODE, %ax	318	mov $VESA_SET_MODE, %ax
336	int $0x10	319	int $0x10
337		320
338	pop %di	321	pop %di
339	cmp $VESA_OK, %al	322	cmp $VESA_OK, %al
340	jnz 0f	323	jnz 0f
341		324
342	#if CONFIG_VESA_BPP == 8	325	#if CONFIG_VESA_BPP == 8
343		326
344	# Set 3:2:3 VGA palette	327	# Set 3:2:3 VGA palette
345		328
346	mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax	329	mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax
347	push %di	330	push %di
348	mov $vga323 - vesa_init, %di	331	mov $vga323 - vesa_init, %di
349	mov $0x100, %ecx	332	mov $0x100, %ecx
350		333
351	bt $5, %ax # Test if VGA compatible registers are present	334	bt $5, %ax # Test if VGA compatible registers are present
352	jnc vga_compat	335	jnc vga_compat
353		336
354	# Try VESA routine to set palette	337	# Try VESA routine to set palette
355		338
356	mov $VESA_SET_PALETTE, %ax	339	mov $VESA_SET_PALETTE, %ax
357	xor %bl, %bl	340	xor %bl, %bl
358	xor %dx, %dx	341	xor %dx, %dx
359	int $0x10	342	int $0x10
360		343
361	cmp $0x00, %ah	344	cmp $0x00, %ah
362	je vga_not_compat	345	je vga_not_compat
363		346
364	vga_compat:	347	vga_compat:
365		348
366	# Try VGA registers to set palette	349	# Try VGA registers to set palette
367		350
368	movw $0x3c6, %dx # Set palette mask	351	movw $0x3c6, %dx # Set palette mask
369	movb $0xff, %al	352	movb $0xff, %al
370	outb %al, %dx	353	outb %al, %dx
371		354
372	movw $0x3c8, %dx # First index to set	355	movw $0x3c8, %dx # First index to set
373	xor %al, %al	356	xor %al, %al
374	outb %al, %dx	357	outb %al, %dx
375		358
376	movw $0x3c9, %dx # Data port	359	movw $0x3c9, %dx # Data port
377	vga_loop:	360	vga_loop:
378	movb %es:2(%di), %al	361	movb %es:2(%di), %al
379	outb %al, %dx	362	outb %al, %dx
380		363
381	movb %es:1(%di), %al	364	movb %es:1(%di), %al
382	outb %al, %dx	365	outb %al, %dx
383		366
384	movb %es:(%di), %al	367	movb %es:(%di), %al
385	outb %al, %dx	368	outb %al, %dx
386		369
387	addw $4, %di	370	addw $4, %di
388	loop vga_loop	371	loop vga_loop
389		372
390	vga_not_compat:	373	vga_not_compat:
391		374
392	pop %di	375	pop %di
393		376
394	#endif	377	#endif
395		378
396	mov VESA_MODE_PHADDR_OFFSET(%di), %esi	379	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
397	mov VESA_MODE_WIDTH_OFFSET(%di), %ax	380	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
398	shl $16, %eax	381	shl $16, %eax
399	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax	382	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
400	mov VESA_MODE_BPP_OFFSET(%di), %bl	383	mov VESA_MODE_BPP_OFFSET(%di), %bl
401	xor %bh, %bh	384	xor %bh, %bh
402	shl $16, %ebx	385	shl $16, %ebx
403	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx	386	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
404	mov %eax, %edi	387	mov %eax, %edi
405		388
406	8:	389	8:
407		390
408	mov %cr0, %eax	391	mov %cr0, %eax
409	or $1, %eax	392	or $1, %eax
410	mov %eax, %cr0	393	mov %eax, %cr0
411		394
412	jmp 9f	395	jmp 9f
413	9:	396	9:
414		397
415	ljmpl $selector(KTEXT_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)	398	ljmpl $selector(KTEXT_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
416		399
417	0:# No prefered mode found	400	0:# No prefered mode found
418	mov $0x111, %cx	401	mov $0x111, %cx
419	push %di	402	push %di
420	push %cx	403	push %cx
421	mov $VESA_GET_MODE_INFO, %ax	404	mov $VESA_GET_MODE_INFO, %ax
422	int $0x10	405	int $0x10
423		406
424	pop %cx	407	pop %cx
425	pop %di	408	pop %di
426	cmp $VESA_OK, %al	409	cmp $VESA_OK, %al
427	jnz 1f	410	jnz 1f
428	jz 2b # Force relative jump	411	jz 2b # Force relative jump
429		412
430	1:	413	1:
431	mov $0x0003, %ax	414	mov $0x0003, %ax
432	int $0x10	415	int $0x10
433	mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA	416	mov $0xffffffff, %edi # EGA text mode used, because of problems with VESA
434	xor %ax, %ax	417	xor %ax, %ax
435	jz 8b # Force relative jump	418	jz 8b # Force relative jump
436		419
437	vga323:	420	vga323:
438	#include "vga323.pal"	421	#include "vga323.pal"
439		422
440	.code32	423	.code32
441	vesa_init_protect:	424	vesa_init_protect:
442	movw $selector(KDATA_DES), %cx	425	movw $selector(KDATA_DES), %cx
443	movw %cx, %es	426	movw %cx, %es
444	movw %cx, %fs	427	movw %cx, %fs
445	movw %cx, %gs	428	movw %cx, %gs
446	movw %cx, %ds # kernel data + stack	429	movw %cx, %ds # kernel data + stack
447	movw %cx, %ss	430	movw %cx, %ss
448		431
449	movl $START_STACK, %esp # initialize stack pointer	432	movl $START_STACK, %esp # initialize stack pointer
450		433
451	jmpl $selector(KTEXT_DES), $vesa_meeting_point	434	jmpl $selector(KTEXT_DES), $vesa_meeting_point
452		435
453	.align 4	436	.align 4
454	e_vesa_init:	437	e_vesa_init:
455	#endif	438	#endif
456		439
457	.section K_DATA_START, "aw", @progbits	440	.section K_DATA_START, "aw", @progbits
458		441
459	.align 4096	442	.align 4096
460	page_directory:	443	page_directory:
461	.space 4096, 0	444	.space 4096, 0
462		445
463	grub_eax:	446	grub_eax:
464	.long 0	447	.long 0
465		448
466	grub_ebx:	449	grub_ebx:
467	.long 0	450	.long 0
468		451
469	pse_msg:	452	pse_msg:
470	.asciz "Page Size Extension not supported. System halted."	453	.asciz "Page Size Extension not supported. System halted."
471		454

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ia32/src/boot/boot.S – Rev 3984 → 3985