source: mainline/kernel/arch/ia32/src/boot/boot.S@ 849ed54

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 849ed54 was bac86377, checked in by Jakub Jermar <jakub@…>, 16 years ago

Put sentinels to beginnings of all ia32 kernel stacks to stop
potential stack traces.
  • Property mode set to 100644
File size: 5.1 KB
Line 
1#
2# Copyright (c) 2001-2004 Jakub Jermar
3# Copyright (c) 2005-2006 Martin Decky
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
30#include <arch/boot/boot.h>
31#include <arch/boot/memmap.h>
32#include <arch/mm/page.h>
33#include <arch/pm.h>
34#include <arch/cpuid.h>
35
36#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
37
38.section K_TEXT_START, "ax"
39
40.code32
41.align 4
42.global multiboot_image_start
43multiboot_header:
44 .long MULTIBOOT_HEADER_MAGIC
45 .long MULTIBOOT_HEADER_FLAGS
46 .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum
47 .long multiboot_header
48 .long unmapped_ktext_start
49 .long 0
50 .long 0
51 .long multiboot_image_start
52
53multiboot_image_start:
54 cld
55 movl $START_STACK, %esp # initialize stack pointer
56 lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register
57
58 movw $gdtselector(KDATA_DES), %cx
59 movw %cx, %es
60 movw %cx, %fs
61 movw %cx, %gs
62 movw %cx, %ds # kernel data + stack
63 movw %cx, %ss
64
65 jmpl $gdtselector(KTEXT_DES), $multiboot_meeting_point
66 multiboot_meeting_point:
67
68 movl %eax, grub_eax # save parameters from GRUB
69 movl %ebx, grub_ebx
70
71 movl $(INTEL_CPUID_LEVEL), %eax
72 cpuid
73 cmp $0x0, %eax # any function > 0?
74 jbe pse_unsupported
75
76 movl $(INTEL_CPUID_STANDARD), %eax
77 cpuid
78 bt $(INTEL_PSE), %edx
79 jc pse_supported
80
81 pse_unsupported:
82 movl $pse_msg, %esi
83 jmp error_halt
84
85 pse_supported:
86
87#include "vesa_prot.inc"
88
89 # map kernel and turn paging on
90 call map_kernel
91
92 # call arch_pre_main(grub_eax, grub_ebx)
93 pushl grub_ebx
94 pushl grub_eax
95 call arch_pre_main
96
97 # Create the first stack frame
98 pushl $0
99 movl %esp, %ebp
100
101 call main_bsp
102
103 # not reached
104 cli
105 hlt0:
106 hlt
107 jmp hlt0
108
109.global map_kernel
110map_kernel:
111 #
112 # Here we setup mapping for both the unmapped and mapped sections of the kernel.
113 # For simplicity, we map the entire 4G space.
114 #
115 movl %cr4, %ecx
116 orl $(1 << 4), %ecx # turn PSE on
117 andl $(~(1 << 5)), %ecx # turn PAE off
118 movl %ecx, %cr4
119
120 movl $(page_directory + 0), %esi
121 movl $(page_directory + 2048), %edi
122 xorl %ecx, %ecx
123 xorl %ebx, %ebx
124
125 floop:
126 movl $((1 << 7) | (1 << 1) | (1 << 0)), %eax
127 orl %ebx, %eax
128 movl %eax, (%esi, %ecx, 4) # mapping 0x00000000 + %ecx * 4M => 0x00000000 + %ecx * 4M
129 movl %eax, (%edi, %ecx, 4) # mapping 0x80000000 + %ecx * 4M => 0x00000000 + %ecx * 4M
130 addl $(4 * 1024 * 1024), %ebx
131
132 incl %ecx
133 cmpl $512, %ecx
134 jl floop
135
136 movl %esi, %cr3
137
138 movl %cr0, %ebx
139 orl $(1 << 31), %ebx # turn paging on
140 movl %ebx, %cr0
141 ret
142
143# Print string from %esi to EGA display (in red) and halt
144error_halt:
145 movl $0xb8000, %edi # base of EGA text mode memory
146 xorl %eax, %eax
147
148 movw $0x3d4, %dx # read bits 8 - 15 of the cursor address
149 movb $0xe, %al
150 outb %al, %dx
151
152 movw $0x3d5, %dx
153 inb %dx, %al
154 shl $8, %ax
155
156 movw $0x3d4, %dx # read bits 0 - 7 of the cursor address
157 movb $0xf, %al
158 outb %al, %dx
159
160 movw $0x3d5, %dx
161 inb %dx, %al
162
163 cmp $1920, %ax
164 jbe cursor_ok
165
166 movw $1920, %ax # sanity check for the cursor on the last line
167
168 cursor_ok:
169
170 movw %ax, %bx
171 shl $1, %eax
172 addl %eax, %edi
173
174 movw $0x0c00, %ax # black background, light red foreground
175
176 ploop:
177 lodsb
178 cmp $0, %al
179 je ploop_end
180 stosw
181 inc %bx
182 jmp ploop
183 ploop_end:
184
185 movw $0x3d4, %dx # write bits 8 - 15 of the cursor address
186 movb $0xe, %al
187 outb %al, %dx
188
189 movw $0x3d5, %dx
190 movb %bh, %al
191 outb %al, %dx
192
193 movw $0x3d4, %dx # write bits 0 - 7 of the cursor address
194 movb $0xf, %al
195 outb %al, %dx
196
197 movw $0x3d5, %dx
198 movb %bl, %al
199 outb %al, %dx
200
201 cli
202 hlt1:
203 hlt
204 jmp hlt1
205
206#include "vesa_real.inc"
207
208.section K_DATA_START, "aw", @progbits
209
210.align 4096
211page_directory:
212 .space 4096, 0
213
214grub_eax:
215 .long 0
216
217grub_ebx:
218 .long 0
219
220pse_msg:
221 .asciz "Page Size Extension not supported. System halted."
222
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