1 files changed, 124 insertions, 0 deletions
diff --git a/src/include/kernel/vmmmgr.H b/src/include/kernel/vmmmgr.H
new file mode 100644
index 000000000..18d1f0862
--- /dev/null
+++ b/src/include/kernel/vmmmgr.H
@@ -0,0 +1,124 @@
+#ifndef __KERNEL_VMMMGR_H
+#define __KERNEL_VMMMGR_H
+
+#include <kernel/types.h>
+
+class VmmManager
+{
+    public:
+	struct pte_t
+	{
+	    uint64_t a,b;
+	};
+
+	enum VMM_CONSTS
+	{
+	    FULL_MEM_SIZE = 8 * 1024 * 1024,
+	    PAGESIZE = 4096,
+
+	    PTSIZE = (1 << 18),
+	    PTEG_SIZE = 8,
+	    PTEG_COUNT = (PTSIZE / sizeof(pte_t)) / PTEG_SIZE,
+
+	    HTABORG = (FULL_MEM_SIZE - PTSIZE),
+	};
+
+	enum ACCESS_TYPES
+	{
+	    NO_USER_ACCESS,
+	    NORMAL_ACCESS,
+	    CI_ACCESS,
+	};
+
+	enum PID_ALLOCATIONS
+	{
+	    LinearSpace = 0,
+	    MMIOSpace = 1,
+	    FirstPid,
+	};
+
+	static void init();
+
+    protected:
+	VmmManager();
+	~VmmManager() {};
+    
+    private:
+	void initSLB();
+	void initPTEs();	
+	void initSDR1();
+
+	static pte_t* page_table;
+
+	inline pte_t& getPte(uint64_t pteg, uint64_t idx)
+	{
+	    return page_table[pteg * PTEG_SIZE + idx];
+	}
+	
+	inline void defaultPte(pte_t& pte)
+	{
+	    pte.a = 0x4000000000000000; // B = 01 (1TB).
+	    pte.b = 0x0;
+	}
+
+	inline void setValid(bool valid, pte_t& pte)
+	{
+	    // Adding a page requires EIEIO to ensure update of PTE prior
+	    // to making valid and PTESYNC afterwards.  
+	    // Removing a page just requires PTESYNC afterwards.
+	    if (valid)
+	    {
+		asm volatile("eieio" ::: "memory");
+	    }
+	    
+	    pte.a &= ~0x01;
+	    pte.a |= (valid ? 0x1 : 0x0);
+	    
+	    asm volatile("ptesync" ::: "memory");
+	}
+
+	inline bool isValid(pte_t& pte)
+	{
+	    return ((pte.a & 0x01) == 0x01);
+	}
+
+	inline void setTid(tid_t tid, pte_t& pte)
+	{
+	    pte.a &= 0xC00000000000007F;
+	    pte.a |= ((uint64_t) tid) << 7;
+	}
+
+	inline tid_t getTid(pte_t& pte)
+	{
+	    return (tid_t) ((pte.a & 0xC00000000000007F) >> 7);
+	}
+
+	inline void setAccess(ACCESS_TYPES t, pte_t& pte)
+	{
+	    uint64_t pteMask = ~0x800000000000007B;
+	    pte.b &= pteMask;
+	    pte.b |= (NO_USER_ACCESS == t ? 0x0000000000000010 :
+		     (NORMAL_ACCESS == t ?  0x0000000000000012 :
+		     (CI_ACCESS == t ?      0x000000000000002A :
+		      0x0)));
+	}
+
+	inline void setPage(uint64_t page, pte_t& pte)
+	{
+	    pte.b &= ~0x0FFFFFFFFFFFF000;
+	    pte.b |= page << 12;
+	}
+
+	inline uint64_t getPage(pte_t& pte)
+	{
+	    return (pte.b & 0x0FFFFFFFFFFFF000) >> 12;
+	}
+
+	inline void pteSync()
+	{
+	    asm volatile("ptesync" ::: "memory");
+	}
+
+};
+
+#endif