diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm')
| -rw-r--r-- | roms/edk2/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/roms/edk2/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm b/roms/edk2/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm new file mode 100644 index 000000000..c3489bcc3 --- /dev/null +++ b/roms/edk2/UefiCpuPkg/CpuDxe/X64/CpuAsm.nasm @@ -0,0 +1,46 @@ +;------------------------------------------------------------------------------
+;*
+;* Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+;* SPDX-License-Identifier: BSD-2-Clause-Patent
+;*
+;* CpuAsm.nasm
+;*
+;* Abstract:
+;*
+;------------------------------------------------------------------------------
+
+ DEFAULT REL
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; SetCodeSelector (
+; UINT16 Selector
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(SetCodeSelector)
+ASM_PFX(SetCodeSelector):
+ sub rsp, 0x10
+ lea rax, [setCodeSelectorLongJump]
+ mov [rsp], rax
+ mov [rsp+4], cx
+ jmp dword far [rsp]
+setCodeSelectorLongJump:
+ add rsp, 0x10
+ ret
+
+;------------------------------------------------------------------------------
+; VOID
+; SetDataSelectors (
+; UINT16 Selector
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(SetDataSelectors)
+ASM_PFX(SetDataSelectors):
+o16 mov ss, cx
+o16 mov ds, cx
+o16 mov es, cx
+o16 mov fs, cx
+o16 mov gs, cx
+ ret
+
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