22504f8b48
See configs/test.py for test config (using simple
binary in my home directory on zizzer).
base/chunk_generator.hh:
Fix assertion for chunkSize == 0 (not a power of 2)
base/intmath.hh:
Fix roundDown to take integer alignments.
cpu/base.cc:
Register exec contexts regardless of state (not sure why
this check was in here in the first place).
mem/physical.cc:
Add breaks to switch.
python/m5/objects/BaseCPU.py:
Default mem to Parent.any (e.g. get from System).
python/m5/objects/Ethernet.py:
python/m5/objects/Root.py:
HierParams is gone.
python/m5/objects/PhysicalMemory.py:
mmu param is full-system only.
sim/process.cc:
Stack mapping request must be page-aligned and page-sized.
Don't delete objFile object in create since we are counting
on it being around for startup().
--HG--
extra : convert_revision : 90c43ee927e7d82a045d6e10302d965797d006f7
137 lines
4.6 KiB
C++
137 lines
4.6 KiB
C++
/*
|
|
* Copyright (c) 2001-2005 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.
|
|
*/
|
|
|
|
#ifndef __BASE__CHUNK_GENERATOR_HH__
|
|
#define __BASE__CHUNK_GENERATOR_HH__
|
|
|
|
/**
|
|
* @file
|
|
* Declaration and inline definition of ChunkGenerator object.
|
|
*/
|
|
|
|
#include <algorithm>
|
|
#include "base/intmath.hh"
|
|
#include "targetarch/isa_traits.hh" // for Addr
|
|
|
|
/**
|
|
* This class takes an arbitrary memory region (address/length pair)
|
|
* and generates a series of appropriately (e.g. block- or page-)
|
|
* aligned chunks covering the same region.
|
|
*
|
|
* Example usage:
|
|
|
|
\code
|
|
for (ChunkGenerator gen(addr, size, chunkSize); !gen.done(); gen.next()) {
|
|
doSomethingChunky(gen.addr(), gen.size());
|
|
}
|
|
\endcode
|
|
*/
|
|
class ChunkGenerator
|
|
{
|
|
private:
|
|
/** The starting address of the current chunk. */
|
|
Addr curAddr;
|
|
/** The starting address of the next chunk (after the current one). */
|
|
Addr nextAddr;
|
|
/** The size of the current chunk (in bytes). */
|
|
int curSize;
|
|
/** The number of bytes remaining in the region after the current chunk. */
|
|
int sizeLeft;
|
|
/** The maximum chunk size, e.g., the cache block size or page size. */
|
|
const int chunkSize;
|
|
|
|
public:
|
|
/**
|
|
* Constructor.
|
|
* @param startAddr The starting address of the region.
|
|
* @param totalSize The total size of the region.
|
|
* @param _chunkSize The size/alignment of chunks into which
|
|
* the region should be decomposed.
|
|
*/
|
|
ChunkGenerator(Addr startAddr, int totalSize, int _chunkSize)
|
|
: chunkSize(_chunkSize)
|
|
{
|
|
// chunkSize must be a power of two
|
|
assert(chunkSize == 0 || isPowerOf2(chunkSize));
|
|
|
|
// set up initial chunk.
|
|
curAddr = startAddr;
|
|
|
|
if (chunkSize == 0) //Special Case, if we see 0, assume no chuncking
|
|
{
|
|
nextAddr = startAddr + totalSize;
|
|
}
|
|
else
|
|
{
|
|
// nextAddr should be *next* chunk start
|
|
nextAddr = roundUp(startAddr, chunkSize);
|
|
if (curAddr == nextAddr) {
|
|
// ... even if startAddr is already chunk-aligned
|
|
nextAddr += chunkSize;
|
|
}
|
|
}
|
|
|
|
// how many bytes are left between curAddr and the end of this chunk?
|
|
int left_in_chunk = nextAddr - curAddr;
|
|
curSize = std::min(totalSize, left_in_chunk);
|
|
sizeLeft = totalSize - curSize;
|
|
}
|
|
|
|
/** Return starting address of current chunk. */
|
|
Addr addr() { return curAddr; }
|
|
/** Return size in bytes of current chunk. */
|
|
int size() { return curSize; }
|
|
|
|
/**
|
|
* Are we done? That is, did the last call to next() advance
|
|
* past the end of the region?
|
|
* @return True if yes, false if more to go.
|
|
*/
|
|
bool done() { return (curSize == 0); }
|
|
|
|
/**
|
|
* Advance generator to next chunk.
|
|
* @return True if successful, false if unsuccessful
|
|
* (because we were at the last chunk).
|
|
*/
|
|
bool next()
|
|
{
|
|
if (sizeLeft == 0) {
|
|
curSize = 0;
|
|
return false;
|
|
}
|
|
|
|
curAddr = nextAddr;
|
|
curSize = std::min(sizeLeft, chunkSize);
|
|
sizeLeft -= curSize;
|
|
nextAddr += curSize;
|
|
return true;
|
|
}
|
|
};
|
|
|
|
#endif // __BASE__CHUNK_GENERATOR_HH__
|