From bfbce336729d1597950d741b9d5ab469d625b2d9 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Sun, 21 Dec 2025 17:54:31 -0500
Subject: mos/x86_64: Add model specific register definitions

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 mos/sys/inc/arch/x86_64/msr.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 mos/sys/inc/arch/x86_64/msr.h

diff --git a/mos/sys/inc/arch/x86_64/msr.h b/mos/sys/inc/arch/x86_64/msr.h
new file mode 100644
index 0000000..4ccf3c8
--- /dev/null
+++ b/mos/sys/inc/arch/x86_64/msr.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025, Ian Moffett.
+ * Provided under the BSD-3 clause.
+ */
+
+#ifndef _MACHINE_MSR_H_
+#define _MACHINE_MSR_H_ 1
+
+#define IA32_APIC_BASE      0x0000001B
+#define IA32_GS_BASE        0xC0000101
+#define IA32_MTRR_CAP       0x000000FE
+#define IA32_DEF_TYPE       0x000002FF
+#define IA32_MTRR_PHYSBASE  0x00000200
+#define IA32_MTRR_PHYSMASK  0x00000201
+#define IA32_KERNEL_GS_BASE 0xC0000102
+#define IA32_EFER           0xC0000080
+
+#endif  /* !_MACHINE_MSR_H_ */
-- 
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