2 * GRUB -- GRand Unified Bootloader
3 * Copyright (C) 2009,2010 Free Software Foundation, Inc.
5 * GRUB is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * GRUB is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
19 #define CODE32_SEGMENT 0x18
20 #define CODE_SEGMENT 0x08
22 /* The data segment of the protected mode. */
23 #define DATA_SEGMENT 0x10
25 #include "relocator_common.S"
27 .p2align 4 /* force 16-byte alignment */
29 VARIABLE(grub_relocator64_start)
36 orl $(GRUB_MEMORY_CPU_CR4_PAE_ON | GRUB_MEMORY_CPU_CR4_PSE_ON), %eax
41 VARIABLE(grub_relocator64_cr3)
46 movl $GRUB_MEMORY_CPU_AMD64_MSR, %ecx
48 orl $GRUB_MEMORY_CPU_AMD64_MSR_ON, %eax
53 orl $GRUB_MEMORY_CPU_CR0_PAGING_ON, %eax
61 VARIABLE(grub_relocator64_cr3)
71 VARIABLE(grub_relocator64_rsp)
79 VARIABLE(grub_relocator64_rsi)
87 VARIABLE(grub_relocator64_rax)
93 VARIABLE(grub_relocator64_rbx)
99 VARIABLE(grub_relocator64_rcx)
102 /* mov imm64, %rdx */
105 VARIABLE(grub_relocator64_rdx)
108 /* Cleared direction flag is of no problem with any current
109 payload and makes this implementation easier. */
116 jmp *LOCAL(jump_addr) (%rip)
120 VARIABLE(grub_relocator64_rip)
127 .byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
129 /* 64-bit segment. */
130 .word 0xffff /* Limit xffff. */
131 .word 0x0000 /* Base xxxx0000. */
132 .byte 0x00 /* Base xx00xxxx. */
133 .byte (0x8 /* Type 8. */ | (1 << 4) /* Code. */ \
134 | (0 << 5) /* Ring 0. */ | (1 << 7) /* Present. */)
135 .byte (0xf /* Limit fxxxx. */ | (0 << 4) /* AVL flag. */ \
136 | (1 << 5) /* 64-bit. */ | (0 << 6) \
137 | (1 << 7) /* 4K granular. */)
138 .byte 0x00 /* Base 00xxxxxx. */
141 .word 0xffff /* Limit xffff. */
142 .word 0x0000 /* Base xxxx0000. */
143 .byte 0x00 /* Base xx00xxxx. */
144 .byte (0x0 /* Type 0. */ | (0 << 4) /* Data. */ \
145 | (0 << 5) /* Ring 0. */ | (1 << 7) /* Present. */)
146 .byte (0xf /* Limit fxxxx. */ | (0 << 4) /* AVL flag. */ \
147 | (0 << 5) /* Data. */ | (0 << 6) \
148 | (1 << 7) /* 4K granular. */)
149 .byte 0x00 /* Base 00xxxxxx. */
151 /* Compatibility segment. */
152 .word 0xffff /* Limit xffff. */
153 .word 0x0000 /* Base xxxx0000. */
154 .byte 0x00 /* Base xx00xxxx. */
155 .byte (0x8 /* Type 8. */ | (1 << 4) /* Code. */ \
156 | (0 << 5) /* Ring 0. */ | (1 << 7) /* Present. */)
157 .byte (0xf /* Limit fxxxx. */ | (0 << 4) /* AVL flag. */ \
158 | (0 << 5) /* 32-bit. */ | (1 << 6) /* 32-bit. */ \
159 | (1 << 7) /* 4K granular. */)
160 .byte 0x00 /* Base 00xxxxxx. */
165 VARIABLE(grub_relocator64_end)