POWER: Add support for the Power ISA

This adds support for the 32-bit, big endian Power ISA. This supports both
integer and floating point instructions based on the Power ISA Book I v2.06.

1 files changed, 158 insertions, 0 deletions

diff --git a/src/arch/power/pagetable.hh b/src/arch/power/pagetable.hh
new file mode 100644
index 000000000..bd2b9d397
--- /dev/null
+++ b/src/arch/power/pagetable.hh
@@ -0,0 +1,158 @@
+/*
+ * 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
+ * Copyright (c) 2009 The University of Edinburgh
+ * 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
+ *          Timothy M. Jones
+ */
+
+#ifndef __ARCH_POWER_PAGETABLE_H__
+#define __ARCH_POWER_PAGETABLE_H__
+
+#include "arch/power/isa_traits.hh"
+#include "arch/power/utility.hh"
+#include "arch/power/vtophys.hh"
+#include "config/full_system.hh"
+
+namespace PowerISA {
+
+struct VAddr
+{
+    static const int ImplBits = 43;
+    static const Addr ImplMask = (ULL(1) << ImplBits) - 1;
+    static const Addr UnImplMask = ~ImplMask;
+
+    Addr addr;
+
+    VAddr(Addr a)
+        : addr(a)
+    {}
+
+    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 PowerISA::PteAddr(addr >> PageShift);
+    }
+
+    Addr
+    level2() const
+    {
+        return PowerISA::PteAddr(addr >> (NPtePageShift + PageShift));
+    }
+
+    Addr
+    level1() const
+    {
+        return PowerISA::PteAddr(addr >> (2 * NPtePageShift + PageShift));
+    }
+};
+
+// ITB/DTB page table entry
+struct PTE
+{
+    // What parts of the VAddr (from bits 28..11) should be used in
+    // translation (includes Mask and MaskX from PageMask)
+    Addr Mask;
+
+    // Virtual Page Number (/2) (Includes VPN2 + VPN2X .. bits 31..11
+    // from EntryHi)
+    Addr VPN;
+
+    // Address Space ID (8 bits) // Lower 8 bits of EntryHi
+    uint8_t asid;
+
+    // Global Bit - Obtained by an *AND* of EntryLo0 and EntryLo1 G bit
+    bool G;
+
+    /* 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);
+};
+
+} // PowerISA namespace
+
+#endif // __ARCH_POWER_PAGETABLE_H__
+