From 515a11b818e4140845f69bb26a19d270a9e42178 Mon Sep 17 00:00:00 2001
From: Alexey Gavrilov <rebovas@yahoo.com>
Date: Wed, 10 Apr 2024 12:58:20 +0700
Subject: MSR + IDT + test ISRs

---
 arch/x86/msr/Msr.h | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 arch/x86/msr/Msr.h

(limited to 'arch/x86/msr/Msr.h')

diff --git a/arch/x86/msr/Msr.h b/arch/x86/msr/Msr.h
new file mode 100644
index 0000000..98c1b02
--- /dev/null
+++ b/arch/x86/msr/Msr.h
@@ -0,0 +1,58 @@
+// Tasks:
+//         1) Implement msr write and save functions
+//         2) Ia32ApicBase field
+
+#include "../cpuinfo/Cpuinfo.h"
+#include <MemoryOperations.h>
+
+#ifndef MSR_H
+#define MSR_H
+
+// defines for Ia32ApicBase
+
+#define BSP_FLAG 0x100
+#define APIC_ENABLE_FLAG 0x800
+#define BASE_FIELD_MASK_LOW 0xfffff000
+#define UINT64_HIGH 0xffffffff00000000
+
+//------------------------
+
+class MsrCommand
+{
+    public:
+        virtual uint32 getCommand() = 0;
+        virtual void decode(uint64 rdmsrResult) = 0;
+        virtual uint64 getMsr() = 0;
+};
+
+class Ia32ApicBase : public MsrCommand
+{
+    private:
+        // Get through Cpuinfo instance
+        uint8 maxPhyAddr;
+        bool bspFlag, enableFlag;
+        uint64 baseField;
+
+    public:
+        Ia32ApicBase();
+        virtual uint32 getCommand() override final;
+        virtual void decode(uint64 rdmrResult) override final;
+        virtual uint64 getMsr() override final;
+        void setBspFlag(bool flag);
+        void setEnableFlag(bool flag);
+        void setBaseField(uint64 fieldAddr);
+};
+
+class Msr
+{
+    private:
+        bool msrSupport;
+    public:
+        Msr();
+        // Return true if MSR not supported (CPUID.01H:EDX[5] = 0)
+        bool rdmsr(MsrCommand *cmd);
+        // Return value same as rdmsr method
+        bool wrmsr(MsrCommand *cmd);
+};
+
+#endif
-- 
cgit v1.2.3