gem5/src/arch/sparc/pagetable.hh

282 lines
7.7 KiB
C++

/*
* Copyright (c) 2006 The Regents of The University of Michigan
* 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: Ali Saidi
*/
#ifndef __ARCH_SPARC_PAGETABLE_HH__
#define __ARCH_SPARC_PAGETABLE_HH__
#include <cassert>
#include "arch/sparc/isa_traits.hh"
#include "base/bitfield.hh"
#include "base/misc.hh"
#include "config/full_system.hh"
class Checkpoint;
namespace SparcISA {
struct VAddr
{
VAddr(Addr a) { panic("not implemented yet."); }
};
class TteTag
{
private:
uint64_t entry;
bool populated;
public:
TteTag() : entry(0), populated(false) {}
TteTag(uint64_t e) : entry(e), populated(true) {}
const TteTag &
operator=(uint64_t e)
{
populated = true;
entry = e;
return *this;
}
bool valid() const {assert(populated); return !bits(entry,62,62); }
Addr va() const {assert(populated); return bits(entry,41,0); }
};
class PageTableEntry
{
public:
enum EntryType {
sun4v,
sun4u,
invalid
};
private:
uint64_t entry;
EntryType type;
uint64_t entry4u;
bool populated;
public:
PageTableEntry()
: entry(0), type(invalid), populated(false)
{}
PageTableEntry(uint64_t e, EntryType t = sun4u)
: entry(e), type(t), populated(true)
{
populate(entry, type);
}
void populate(uint64_t e, EntryType t = sun4u)
{
entry = e;
type = t;
populated = true;
// If we get a sun4v format TTE, turn it into a sun4u
if (type == sun4u)
entry4u = entry;
else {
entry4u = 0;
entry4u |= mbits(entry,63,63); //valid
entry4u |= bits(entry,1,0) << 61; //size[1:0]
entry4u |= bits(entry,62,62) << 60; //nfo
entry4u |= bits(entry,12,12) << 59; //ie
entry4u |= bits(entry,2,2) << 48; //size[2]
entry4u |= mbits(entry,39,13); //paddr
entry4u |= bits(entry,61,61) << 6;; // locked
entry4u |= bits(entry,10,10) << 5; //cp
entry4u |= bits(entry,9,9) << 4; //cv
entry4u |= bits(entry,11,11) << 3; //e
entry4u |= bits(entry,8,8) << 2; //p
entry4u |= bits(entry,6,6) << 1; //w
}
}
void
clear()
{
populated = false;
}
static int pageSizes[6];
uint64_t operator()() const { assert(populated); return entry4u; }
const PageTableEntry &
operator=(uint64_t e)
{
populated = true;
entry4u = e;
return *this;
}
const PageTableEntry &
operator=(const PageTableEntry &e)
{
populated = true;
entry4u = e.entry4u;
type = e.type;
return *this;
}
bool valid() const { return bits(entry4u,63,63) && populated; }
uint8_t
_size() const
{
assert(populated);
return bits(entry4u, 62,61) | bits(entry4u, 48,48) << 2;
}
Addr size() const { assert(_size() < 6); return pageSizes[_size()]; }
Addr sizeMask() const { return size() - 1; }
bool ie() const { return bits(entry4u, 59,59); }
Addr pfn() const { assert(populated); return bits(entry4u,39,13); }
Addr paddr() const { assert(populated); return mbits(entry4u, 39,13);}
bool locked() const { assert(populated); return bits(entry4u,6,6); }
bool cv() const { assert(populated); return bits(entry4u,4,4); }
bool cp() const { assert(populated); return bits(entry4u,5,5); }
bool priv() const { assert(populated); return bits(entry4u,2,2); }
bool writable() const { assert(populated); return bits(entry4u,1,1); }
bool nofault() const { assert(populated); return bits(entry4u,60,60); }
bool sideffect() const { assert(populated); return bits(entry4u,3,3); }
Addr paddrMask() const { assert(populated); return paddr() & ~sizeMask(); }
Addr
translate(Addr vaddr) const
{
assert(populated);
Addr mask = sizeMask();
return (paddr() & ~mask) | (vaddr & mask);
}
};
struct TlbRange
{
Addr va;
Addr size;
int contextId;
int partitionId;
bool real;
inline bool
operator<(const TlbRange &r2) const
{
if (real && !r2.real)
return true;
if (!real && r2.real)
return false;
if (!real && !r2.real) {
if (contextId < r2.contextId)
return true;
else if (contextId > r2.contextId)
return false;
}
if (partitionId < r2.partitionId)
return true;
else if (partitionId > r2.partitionId)
return false;
if (va < r2.va)
return true;
return false;
}
inline bool
operator==(const TlbRange &r2) const
{
return va == r2.va &&
size == r2.size &&
contextId == r2.contextId &&
partitionId == r2.partitionId &&
real == r2.real;
}
};
struct TlbEntry
{
TlbEntry()
{}
TlbEntry(Addr asn, Addr vaddr, Addr paddr)
{
uint64_t entry = 0;
entry |= 1ULL << 1; // Writable
entry |= 0ULL << 2; // Available in nonpriveleged mode
entry |= 0ULL << 3; // No side effects
entry |= 1ULL << 4; // Virtually cachable
entry |= 1ULL << 5; // Physically cachable
entry |= 0ULL << 6; // Not locked
entry |= mbits(paddr, 39, 13); // Physical address
entry |= 0ULL << 48; // size = 8k
entry |= 0uLL << 59; // Endianness not inverted
entry |= 0ULL << 60; // Not no fault only
entry |= 0ULL << 61; // size = 8k
entry |= 1ULL << 63; // valid
pte = PageTableEntry(entry);
range.va = vaddr;
range.size = 8*(1<<10);
range.contextId = asn;
range.partitionId = 0;
range.real = false;
valid = true;
}
TlbRange range;
PageTableEntry pte;
bool used;
bool valid;
Addr pageStart()
{
return pte.paddr();
}
void
updateVaddr(Addr new_vaddr)
{
range.va = new_vaddr;
}
void serialize(std::ostream &os);
void unserialize(Checkpoint *cp, const std::string &section);
};
} // namespace SparcISA
#endif // __ARCH_SPARC_PAGE_TABLE_HH__