source: mainline/kernel/arch/ia32/src/boot/multiboot2.S@ 3bacee1

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 3bacee1 was a35b458, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 8 years ago

style: Remove trailing whitespace on _all_ lines, including empty ones, for particular file types.

Command used: tools/srepl '\s\+$' '' -- *.c *.h *.py *.sh *.s *.S *.ag

Currently, whitespace on empty lines is very inconsistent.
There are two basic choices: Either remove the whitespace, or keep empty lines
indented to the level of surrounding code. The former is AFAICT more common,
and also much easier to do automatically.

Alternatively, we could write script for automatic indentation, and use that
instead. However, if such a script exists, it's possible to use the indented
style locally, by having the editor apply relevant conversions on load/save,
without affecting remote repository. IMO, it makes more sense to adopt
the simpler rule.
  • Property mode set to 100644
File size: 4.9 KB
Line 
1/*
2 * Copyright (c) 2011 Martin Decky
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <abi/asmtool.h>
30#include <arch/boot/boot.h>
31#include <arch/pm.h>
32#include <arch/cpuid.h>
33#include <genarch/multiboot/multiboot2.h>
34
35#define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE)
36
37.section K_TEXT_START, "ax"
38
39.code32
40
41.align 8
42multiboot2_header_start:
43 .long MULTIBOOT2_HEADER_MAGIC
44 .long MULTIBOOT2_HEADER_ARCH_I386
45 .long multiboot2_header_end - multiboot2_header_start
46 .long -(MULTIBOOT2_HEADER_MAGIC + MULTIBOOT2_HEADER_ARCH_I386 + (multiboot2_header_end - multiboot2_header_start))
47
48 /* Information request tag */
49 .align 8
50 tag_info_req_start:
51 .word MULTIBOOT2_TAG_INFO_REQ
52 .word MULTIBOOT2_FLAGS_REQUIRED
53 .long tag_info_req_end - tag_info_req_start
54 .long MULTIBOOT2_TAG_CMDLINE
55 .long MULTIBOOT2_TAG_MODULE
56 .long MULTIBOOT2_TAG_MEMMAP
57#ifdef CONFIG_FB
58 .long MULTIBOOT2_TAG_FBINFO
59#endif
60 tag_info_req_end:
61
62 /* Address tag */
63 .align 8
64 tag_address_start:
65 .word MULTIBOOT2_TAG_ADDRESS
66 .word MULTIBOOT2_FLAGS_REQUIRED
67 .long tag_address_end - tag_address_start
68 .long multiboot2_header_start
69 .long unmapped_ktext_start
70 .long 0
71 .long 0
72 tag_address_end:
73
74 /* Entry address tag */
75 .align 8
76 tag_entry_address_start:
77 .word MULTIBOOT2_TAG_ENTRY_ADDRESS
78 .word MULTIBOOT2_FLAGS_REQUIRED
79 .long tag_entry_address_end - tag_entry_address_start
80 .long multiboot2_image_start
81 tag_entry_address_end:
82
83 /* Flags tag */
84 .align 8
85 tag_flags_start:
86 .word MULTIBOOT2_TAG_FLAGS
87 .word MULTIBOOT2_FLAGS_REQUIRED
88 .long tag_flags_end - tag_flags_start
89 .long MULTIBOOT2_FLAGS_CONSOLE
90 tag_flags_end:
91
92#ifdef CONFIG_FB
93 /* Framebuffer tag */
94 .align 8
95 tag_framebuffer_start:
96 .word MULTIBOOT2_TAG_FRAMEBUFFER
97 .word MULTIBOOT2_FLAGS_REQUIRED
98 .long tag_framebuffer_end - tag_framebuffer_start
99 .long CONFIG_BFB_WIDTH
100 .long CONFIG_BFB_HEIGHT
101 .long CONFIG_BFB_BPP
102 tag_framebuffer_end:
103#endif
104
105 /* Module alignment tag */
106 .align 8
107 tag_module_align_start:
108 .word MULTIBOOT2_TAG_MODULE_ALIGN
109 .word MULTIBOOT2_FLAGS_REQUIRED
110 .long tag_module_align_end - tag_module_align_start
111 .long 0
112 tag_module_align_end:
113
114 /* Tag terminator */
115 .align 8
116 tag_terminator_start:
117 .word MULTIBOOT2_TAG_TERMINATOR
118 .word MULTIBOOT2_FLAGS_REQUIRED
119 .long tag_terminator_end - tag_terminator_start
120 tag_terminator_end:
121multiboot2_header_end:
122
123SYMBOL(multiboot2_image_start)
124 cli
125 cld
126
127 /* Initialize stack pointer */
128 movl $START_STACK, %esp
129
130 /*
131 * Initialize Global Descriptor Table and
132 * Interrupt Descriptor Table registers
133 */
134 lgdtl bootstrap_gdtr
135 lidtl bootstrap_idtr
136
137 /* Kernel data + stack */
138 movw $GDT_SELECTOR(KDATA_DES), %cx
139 movw %cx, %es
140 movw %cx, %fs
141 movw %cx, %gs
142 movw %cx, %ds
143 movw %cx, %ss
144
145 jmpl $GDT_SELECTOR(KTEXT_DES), $multiboot2_meeting_point
146 multiboot2_meeting_point:
147
148 /* Save multiboot arguments */
149 movl %eax, multiboot_eax
150 movl %ebx, multiboot_ebx
151
152#ifndef PROCESSOR_i486
153
154 movl $(INTEL_CPUID_LEVEL), %eax
155 cpuid
156 cmp $0x0, %eax /* any function > 0? */
157 jbe pse_unsupported
158
159 movl $(INTEL_CPUID_STANDARD), %eax
160 cpuid
161 bt $(INTEL_PSE), %edx
162 jnc pse_unsupported
163
164 /* Map kernel and turn paging on */
165 call map_kernel_pse
166 jmp stack_init
167
168#endif /* PROCESSOR_i486 */
169
170 pse_unsupported:
171
172 /* Map kernel and turn paging on */
173 call map_kernel_non_pse
174
175 stack_init:
176
177 /* Create the first stack frame */
178 pushl $0
179 movl %esp, %ebp
180
181 /* Call ia32_pre_main(multiboot_eax, multiboot_ebx) */
182 pushl multiboot_ebx
183 pushl multiboot_eax
184 call ia32_pre_main
185
186 /* Call main_bsp() */
187 call main_bsp
188
189 /* Not reached */
190 cli
191 hlt0:
192 hlt
193 jmp hlt0
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