diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/X64/DisablePaging64.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/DisablePaging64.S | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/MdePkg/Library/BaseLib/X64/DisablePaging64.S b/MdePkg/Library/BaseLib/X64/DisablePaging64.S index 676e9e175a..220a59127b 100644 --- a/MdePkg/Library/BaseLib/X64/DisablePaging64.S +++ b/MdePkg/Library/BaseLib/X64/DisablePaging64.S @@ -1,6 +1,6 @@ #------------------------------------------------------------------------------
#
-# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
@@ -21,7 +21,7 @@ #
#------------------------------------------------------------------------------
-
+
#------------------------------------------------------------------------------
# VOID
@@ -37,29 +37,29 @@ ASM_GLOBAL ASM_PFX(InternalX86DisablePaging64)
ASM_PFX(InternalX86DisablePaging64):
- cli
+ cli
lea L1(%rip), %rsi # rsi <- The start address of transition code
mov 0x28(%rsp), %edi # rdi <- New stack
lea _mTransitionEnd(%rip), %rax # rax <- end of transition code
sub %rsi, %rax # rax <- The size of transition piece code
add $4, %rax # round rax up to the next 4 byte boundary
and $0xfc, %al
- sub %rax, %rdi # rdi <- use stack to hold transition code
+ sub %rax, %rdi # rdi <- use stack to hold transition code
mov %edi, %r10d # r10 <- The start address of transicition code below 4G
push %rcx # save rcx to stack
mov %rax, %rcx # rcx <- The size of transition piece code
rep
movsb # copy transition code to (new stack - 64byte) below 4G
pop %rcx # restore rcx
-
- mov %r8d, %esi
- mov %r9d, %edi
+
+ mov %r8d, %esi
+ mov %r9d, %edi
mov %r10d, %eax
sub $4, %eax
push %rcx # push Cs to stack
- push %r10 # push address of transition code on stack
+ push %r10 # push address of transition code on stack
.byte 0x48, 0xcb # retq: Use far return to load CS register from stack
- # (Use raw byte code since some GNU assemblers generates incorrect code for "retq")
+ # (Use raw byte code since some GNU assemblers generates incorrect code for "retq")
L1:
mov %eax,%esp # set up new stack
mov %cr0,%rax
@@ -68,9 +68,9 @@ L1: mov %edx,%ebx # save EntryPoint to ebx, for rdmsr will overwrite edx
mov $0xc0000080,%ecx
- rdmsr
+ rdmsr
and $0xfe,%ah # clear LME
- wrmsr
+ wrmsr
mov %cr4,%rax
and $0xdf,%al # clear PAE
mov %rax,%cr4
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