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1 
#
 1 
#
2 
# Copyright (C) 2005 Ondrej Palkovsky
 2 
# Copyright (C) 2005 Ondrej Palkovsky
3 
# All rights reserved.
 3 
# All rights reserved.
4 
#
 4 
#
5 
# Redistribution and use in source and binary forms, with or without
 5 
# Redistribution and use in source and binary forms, with or without
6 
# modification, are permitted provided that the following conditions
 6 
# modification, are permitted provided that the following conditions
7 
# are met:
 7 
# are met:
8 
#
 8 
#
9 
# - Redistributions of source code must retain the above copyright
 9 
# - Redistributions of source code must retain the above copyright
10 
#   notice, this list of conditions and the following disclaimer.
 10 
#   notice, this list of conditions and the following disclaimer.
11 
# - Redistributions in binary form must reproduce the above copyright
 11 
# - Redistributions in binary form must reproduce the above copyright
12 
#   notice, this list of conditions and the following disclaimer in the
 12 
#   notice, this list of conditions and the following disclaimer in the
13 
#   documentation and/or other materials provided with the distribution.
 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
 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.
 15 
#   derived from this software without specific prior written permission.
16 
#
 16 
#
17 
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 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
 18 
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 19 
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 20 
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 21 
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 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
 23 
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 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
 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.
 26 
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
#
 27 
#
28 
 
 28 
 
29 
#include <arch/mm/page.h>
29 
#include <arch/mm/page.h>
30 
#include <arch/mm/ptl.h>
 30 
#include <arch/mm/ptl.h>
31 
#include <arch/pm.h>
 31 
#include <arch/pm.h>
32 
#include <arch/cpu.h>
 32 
#include <arch/cpu.h>
33 
#include <arch/cpuid.h>
 33 
#include <arch/cpuid.h>
34 
#include <arch/boot/boot.h>
 34 
#include <arch/boot/boot.h>
35 
 
 35 
 
- 
 
 36 
#define START_STACK	(BOOT_OFFSET - BOOT_STACK_SIZE)
36 
#define START_STACK_64  0xffffffff80007c00
 37 
#define START_STACK_64  0xffffffff80007c00
37
38
- 
 
 39 
.section K_TEXT_START, "ax"
- 
 
 40 
# .code16
- 
 
 41 
# .global kernel_image_start
- 
 
 42 
# .global multiboot_image_start
- 
 
 43 
# kernel_image_start:
- 
 
 44 
# 	cli
- 
 
 45 
# 	xorw %ax,%ax
- 
 
 46 
# 	movw %ax,%ds
- 
 
 47 
# 	movw %ax,%es
- 
 
 48 
# 	movw %ax,%ss            # initialize stack segment register
- 
 
 49 
# 	movl $(START_STACK), %esp	# initialize stack pointer
38 
#
 50 
#
39 
# This is where we require any SPARTAN-kernel-compatible boot loader
 - 
 
40 
# to pass control in real mode.
 51 
# 	call memmap_arch_init
41 
#
 52 
#
- 
 
 53 
# 	movl $0x80000000, %eax
- 
 
 54 
# 	cpuid
- 
 
 55 
# 	cmp $0x80000000, %eax 	# any function > 80000000h?
- 
 
 56 
# 	jbe no_long_mode
42 
# Protected mode tables are statically initialised during compile
 57 
# 	movl $(AMD_CPUID_EXTENDED), %eax # Extended function code 80000001
- 
 
 58 
# 	cpuid
43 
# time. So we can just load the respective table registers and
 59 
# 	bt $29, %edx 		# Test if long mode is supported.
- 
 
 60 
# 	jnc no_long_mode
- 
 
 61 
#
- 
 
 62 
# 	# Load gdtr, idtr
- 
 
 63 
# 	lgdt real_bootstrap_gdtr_boot
- 
 
 64 
#
- 
 
 65 
# 	movl %cr0,%eax
- 
 
 66 
# 	orl $0x1,%eax
44 
# switch to protected mode.
 67 
# 	movl %eax,%cr0			# switch to protected mode
- 
 
 68 
#
- 
 
 69 
# 	jmpl $gdtselector(KTEXT32_DES), $now_in_prot
- 
 
 70 
#
- 
 
 71 
# no_long_mode:
- 
 
 72 
# 1:
- 
 
 73 
# 	jmp 1b
45 
#
 74 
#
46 
 
 - 
 
47 
#define START_STACK (BOOTSTRAP_OFFSET-0x400)
 - 
 
48
- 
 
49 
.section K_TEXT_START, "ax"
 - 
 
50 
.code16
 - 
 
51 
.global kernel_image_start
 - 
 
52 
.global multiboot_image_start
 - 
 
53 
kernel_image_start:
 - 
 
54 
	cli
 - 
 
55 
	xorw %ax,%ax
 - 
 
56 
	movw %ax,%ds
 - 
 
57 
	movw %ax,%es
 - 
 
58 
	movw %ax,%ss            # initialize stack segment register
 - 
 
59 
	movl $(START_STACK), %esp	# initialize stack pointer
 - 
 
60
- 
 
61 
	call memmap_arch_init
 - 
 
62
- 
 
63 
	movl $0x80000000, %eax
- 
 
64 
	cpuid
 - 
 
65 
	cmp $0x80000000, %eax 	# any function > 80000000h?
 - 
 
66 
	jbe no_long_mode
 - 
 
67 
	movl $(AMD_CPUID_EXTENDED), %eax # Extended function code 80000001
 - 
 
68 
	cpuid
 - 
 
69 
	bt $29, %edx 		# Test if long mode is supported.
 - 
 
70 
	jnc no_long_mode
 - 
 
71 
 
 - 
 
72 
	# Load gdtr, idtr
 - 
 
73 
	lgdt real_bootstrap_gdtr_boot
 - 
 
74
- 
 
75 
	movl %cr0,%eax
 - 
 
76 
	orl $0x1,%eax
 - 
 
77 
	movl %eax,%cr0			# switch to protected mode
 - 
 
78 
 
 - 
 
79 
	jmpl $gdtselector(KTEXT32_DES), $now_in_prot
 - 
 
80 
 
 - 
 
81 
no_long_mode:
 - 
 
82 
1:
 - 
 
83 
	jmp 1b
 - 
 
84
- 
 
85 
.code32
 75 
.code32
86 
.align 4
 76 
.align 4
87 
multiboot_header:
 77 
multiboot_header:
88 
	.long MULTIBOOT_HEADER_MAGIC
 78 
	.long MULTIBOOT_HEADER_MAGIC
89 
	.long MULTIBOOT_HEADER_FLAGS
 79 
	.long MULTIBOOT_HEADER_FLAGS
90 
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)	# checksum
 80 
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)	# checksum
91 
	.long multiboot_header + BOOT_OFFSET
 81 
	.long multiboot_header
92 
	.long unmapped_ktext_start + BOOT_OFFSET
 82 
	.long unmapped_ktext_start
93 
	.long 0
 83 
	.long 0
94 
	.long 0
 84 
	.long 0
95 
	.long multiboot_image_start + BOOT_OFFSET
 85 
	.long multiboot_image_start
96 
 
 86 
 
97 
multiboot_image_start:
 87 
multiboot_image_start:
98 
	movl $START_STACK, %esp				# initialize stack pointer
 88 
	movl $START_STACK, %esp				# initialize stack pointer
99
89
100 
	lgdt protected_bootstrap_gdtr + BOOT_OFFSET		# initialize Global Descriptor Table register
 90 
	lgdt protected_bootstrap_gdtr + BOOT_OFFSET		# initialize Global Descriptor Table register
101 
 
 91 
 
102 
	movw $gdtselector(KDATA_DES), %cx
 92 
	movw $gdtselector(KDATA_DES), %cx
103 
	movw %cx, %es
 93 
	movw %cx, %es
104 
	movw %cx, %gs
 94 
	movw %cx, %gs
105 
	movw %cx, %fs
 95 
	movw %cx, %fs
106 
	movw %cx, %ds							# kernel data + stack
 96 
	movw %cx, %ds							# kernel data + stack
107 
	movw %cx, %ss
 97 
	movw %cx, %ss
108
98
109 
	jmpl $gdtselector(KTEXT_DES), $multiboot_meeting_point + BOOT_OFFSET
 99 
	jmpl $gdtselector(KTEXT_DES), $multiboot_meeting_point + BOOT_OFFSET
110 
	multiboot_meeting_point:
 100 
	multiboot_meeting_point:
111
101
112 
	hlt
 - 
 
113 
 
 - 
 
114 
# Protected 32-bit. We want to reuse the code-seg descriptor,
 102 
	# Protected 32-bit. We want to reuse the code-seg descriptor,
115 
# the Default operand size must not be 1 when entering long mode
 103 
	# the Default operand size must not be 1 when entering long mode
116 
now_in_prot:
- 
 
117 
	# Set up stack & data descriptors
 - 
 
118 
	movw $gdtselector(KDATA_DES), %ax
 - 
 
119 
	movw %ax, %ds
 - 
 
120 
	movw %ax, %ss
 - 
 
121 
 
 - 
 
122 
	movb $0xd1, %al		# enable A20 using the keyboard controller
 - 
 
123 
	outb %al, $0x64
 - 
 
124 
	movb $0xdf, %al
 - 
 
125 
	outb %al, $0x60
 - 
 
126 
 
 104
- 
 
 105 
	pushl %ebx							# save parameters from GRUB
- 
 
 106 
	pushl %eax
127
107
128 
	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
 108 
	# Enable 64-bit page transaltion entries - CR4.PAE = 1.
129 
	# Paging is not enabled until after long mode is enabled
 109 
	# Paging is not enabled until after long mode is enabled
- 
 
 110
130 
	movl %cr4, %eax
 111 
	movl %cr4, %eax
131 
	btsl $5, %eax
 112 
	btsl $5, %eax
132 
	movl %eax, %cr4
 113 
	movl %eax, %cr4
133 
 
 114 
 
134 
	# Set up paging tables
 115 
	# Set up paging tables
- 
 
 116
135 
	leal ptl_0, %eax
 117 
	leal ptl_0, %eax
136 
	movl %eax, %cr3
 118 
	movl %eax, %cr3
137
119
138 
	# Enable long mode
 120 
	# Enable long mode
- 
 
 121
139 
	movl $EFER_MSR_NUM, %ecx   # EFER MSR number
 122 
	movl $EFER_MSR_NUM, %ecx	# EFER MSR number
140 
	rdmsr                   # Read EFER
 123 
	rdmsr						# Read EFER
141 
	btsl $AMD_LME_FLAG, %eax            # Set LME=1
 124 
	btsl $AMD_LME_FLAG, %eax	# Set LME=1
142 
	wrmsr                   # Write EFER
 125 
	wrmsr						# Write EFER
143
126
144 
	# Enable paging to activate long mode (set CR0.PG=1)
 127 
	# Enable paging to activate long mode (set CR0.PG=1)
- 
 
 128
145 
	movl %cr0, %eax
 129 
	movl %cr0, %eax
146 
	btsl $31, %eax
 130 
	btsl $31, %eax
147 
	movl %eax, %cr0
 131 
	movl %eax, %cr0
148
132
149 
	# At this point we are in compatibility mode
 133 
	# At this point we are in compatibility mode
- 
 
 134
150 
	jmpl $gdtselector(KTEXT_DES), $start64
 135 
	jmpl $gdtselector(KTEXT_DES), $start64
151 
 
 136 
 
152 
.code64
 137 
.code64
153 
start64:
 138 
start64:
154 
	movq $(PA2KA(START_STACK)), %rsp
 139 
	movq $(PA2KA(START_STACK)), %rsp
155 
 
 140 
 
156 
	# Copy kernel to higher physical memory
 - 
 
157 
	movq $BOOTSTRAP_OFFSET, %rsi
 - 
 
158 
	movq $BOOTSTRAP_OFFSET + BOOT_OFFSET, %rdi
 - 
 
159 
	movq $_hardcoded_kernel_size, %rcx
 - 
 
160 
	cld
 - 
 
161 
	rep movsb
 - 
 
162
- 
 
163 
	call main_bsp   # never returns
 141 
	call main_bsp   # never returns
164 
1:
 142
165 
	jmp 1b
 143 
	cli
- 
 
 144 
	hlt
166
145
167 
.section K_DATA_START, "aw", @progbits
 146 
.section K_DATA_START, "aw", @progbits
168 
.align 4096
 147 
.align 4096
169 
 
 148 
 
170 
# Identical mapping of first 64MB and the same of -2GB -> 0
149 
# Identical mapping of first 64MB and the same of -2GB -> 0
171 
.global ptl_2
 150 
.global ptl_2
172 
ptl_2:
151 
ptl_2:
173 
	.quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 152 
	.quad 0x0 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
174 
	.quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 153 
	.quad 0x200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
175 
	.quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 154 
	.quad 0x400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
176 
	.quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 155 
	.quad 0x600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
177 
	.quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 156 
	.quad 0x800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
178 
	.quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 157 
	.quad 0xa00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
179 
	.quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 158 
	.quad 0xc00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
180 
	.quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 159 
	.quad 0xe00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
181 
	.quad 0x1000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 160 
	.quad 0x1000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
182 
	.quad 0x1200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 161 
	.quad 0x1200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
183 
	.quad 0x1400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 162 
	.quad 0x1400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
184 
	.quad 0x1600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 163 
	.quad 0x1600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
185 
	.quad 0x1800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 164 
	.quad 0x1800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
186 
	.quad 0x1a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 165 
	.quad 0x1a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
187 
	.quad 0x1c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 166 
	.quad 0x1c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
188 
	.quad 0x1e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 167 
	.quad 0x1e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
189 
	.quad 0x2000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 168 
	.quad 0x2000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
190 
	.quad 0x2200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 169 
	.quad 0x2200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
191 
	.quad 0x2400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 170 
	.quad 0x2400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
192 
	.quad 0x2600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 171 
	.quad 0x2600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
193 
	.quad 0x2800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 172 
	.quad 0x2800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
194 
	.quad 0x2a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 173 
	.quad 0x2a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
195 
	.quad 0x2c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 174 
	.quad 0x2c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
196 
	.quad 0x2e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 175 
	.quad 0x2e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
197 
	.quad 0x3000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 176 
	.quad 0x3000000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
198 
	.quad 0x3200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 177 
	.quad 0x3200000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
199 
	.quad 0x3400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 178 
	.quad 0x3400000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
200 
	.quad 0x3600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 179 
	.quad 0x3600000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
201 
	.quad 0x3800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 180 
	.quad 0x3800000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
202 
	.quad 0x3a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 181 
	.quad 0x3a00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
203 
	.quad 0x3c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 182 
	.quad 0x3c00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
204 
	.quad 0x3e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
 183 
	.quad 0x3e00000 | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
205
184
206 
.align 4096
 185 
.align 4096
207 
.global ptl_1
 186 
.global ptl_1
208 
ptl_1:
 187 
ptl_1:
209 
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
 188 
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
210 
	.fill 509,8,0
 189 
	.fill 509,8,0
211 
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
 190 
	.quad ptl_2 + (PTL_WRITABLE | PTL_PRESENT)
212 
	.fill 1,8,0
 191 
	.fill 1,8,0
213
192
214 
.align 4096
 193 
.align 4096
215 
.global ptl_0
 194 
.global ptl_0
216 
ptl_0:
 195 
ptl_0:
217 
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
 196 
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
218 
	.fill 510,8,0
 197 
	.fill 510,8,0
219 
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
 198 
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
220 
 
 199 
 
221 
.global real_bootstrap_gdtr_boot
 - 
 
222 
real_bootstrap_gdtr_boot:
 - 
 
223 
	.word gdtselector(GDT_ITEMS)
 - 
 
224 
	.long KA2PA(gdt)-BOOT_OFFSET
 - 
 
225 
 
 - 
 
226 
.global protected_bootstrap_gdtr
 200 
.global protected_bootstrap_gdtr
227 
protected_bootstrap_gdtr:
 201 
protected_bootstrap_gdtr:
228 
	.word gdtselector(GDT_ITEMS)
 202 
	.word gdtselector(GDT_ITEMS)
229 
	.long KA2PA(gdt)
 203 
	.long KA2PA(gdt)
230 
 
 204