arm: add ARM support to M5

1 files changed, 102 insertions, 0 deletions

diff --git a/src/arch/arm/pagetable.hh b/src/arch/arm/pagetable.hh
new file mode 100644
index 000000000..ad3464a63
--- /dev/null
+++ b/src/arch/arm/pagetable.hh
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2002-2005 The Regents of The University of Michigan
+ * Copyright (c) 2007 MIPS Technologies, Inc.
+ * Copyright (c) 2007-2008 The Florida State University
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Nathan Binkert
+ *          Steve Reinhardt
+ *          Jaidev Patwardhan
+ *          Stephen Hines
+ */
+
+#ifndef __ARCH_ARM_PAGETABLE_H__
+#define __ARCH_ARM_PAGETABLE_H__
+
+#include "arch/arm/isa_traits.hh"
+#include "arch/arm/utility.hh"
+#include "arch/arm/vtophys.hh"
+#include "config/full_system.hh"
+
+namespace ArmISA {
+
+    struct VAddr
+    {
+        static const int ImplBits = 43;
+        static const Addr ImplMask = (ULL(1) << ImplBits) - 1;
+        static const Addr UnImplMask = ~ImplMask;
+
+        VAddr(Addr a) : addr(a) {}
+        Addr addr;
+        operator Addr() const { return addr; }
+        const VAddr &operator=(Addr a) { addr = a; return *this; }
+
+        Addr vpn() const { return (addr & ImplMask) >> PageShift; }
+        Addr page() const { return addr & Page_Mask; }
+        Addr offset() const { return addr & PageOffset; }
+
+        Addr level3() const
+        { return ArmISA::PteAddr(addr >> PageShift); }
+        Addr level2() const
+        { return ArmISA::PteAddr(addr >> (NPtePageShift + PageShift)); }
+        Addr level1() const
+        { return ArmISA::PteAddr(addr >> (2 * NPtePageShift + PageShift)); }
+    };
+
+    // ITB/DTB page table entry
+    struct PTE
+    {
+      Addr Mask; // What parts of the VAddr (from bits 28..11) should be used in translation (includes Mask and MaskX from PageMask)
+      Addr VPN; // Virtual Page Number (/2) (Includes VPN2 + VPN2X .. bits 31..11 from EntryHi)
+      uint8_t asid; // Address Space ID (8 bits) // Lower 8 bits of EntryHi
+
+      bool G;    // Global Bit - Obtained by an *AND* of EntryLo0 and EntryLo1 G bit
+
+      /* Contents of Entry Lo0 */
+      Addr PFN0; // Physical Frame Number - Even
+      bool D0;   // Even entry Dirty Bit
+      bool V0;   // Even entry Valid Bit
+      uint8_t C0; // Cache Coherency Bits - Even
+
+      /* Contents of Entry Lo1 */
+      Addr PFN1; // Physical Frame Number - Odd
+      bool D1;   // Odd entry Dirty Bit
+      bool V1;   // Odd entry Valid Bit
+      uint8_t C1; // Cache Coherency Bits (3 bits)
+
+      /* The next few variables are put in as optimizations to reduce TLB lookup overheads */
+      /* For a given Mask, what is the address shift amount, and what is the OffsetMask */
+      int AddrShiftAmount;
+      int OffsetMask;
+
+      bool Valid() { return (V0 | V1);};
+        void serialize(std::ostream &os);
+        void unserialize(Checkpoint *cp, const std::string &section);
+    };
+
+};
+#endif // __ARCH_ARM_PAGETABLE_H__
+