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/MdePkg/Library/BaseLib/Ia32/WriteDr1.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/BaseLib/Ia32/WriteDr1.c')
| -rw-r--r-- | roms/edk2/MdePkg/Library/BaseLib/Ia32/WriteDr1.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/Ia32/WriteDr1.c b/roms/edk2/MdePkg/Library/BaseLib/Ia32/WriteDr1.c new file mode 100644 index 000000000..f1c8f325e --- /dev/null +++ b/roms/edk2/MdePkg/Library/BaseLib/Ia32/WriteDr1.c @@ -0,0 +1,31 @@ +/** @file
+ AsmWriteDr1 function
+
+ Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+/**
+ Writes a value to Debug Register 1 (DR1).
+
+ Writes and returns a new value to DR1. This function is only available on
+ IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.
+
+ @param Value The value to write to Dr1.
+
+ @return The value written to Debug Register 1 (DR1).
+
+**/
+UINTN
+EFIAPI
+AsmWriteDr1 (
+ IN UINTN Value
+ )
+{
+ _asm {
+ mov eax, Value
+ mov dr1, eax
+ }
+}
+
|