152 lines
4.2 KiB
C++
152 lines
4.2 KiB
C++
/*
|
|
* Copyright (c) 2009 Mark D. Hill and David A. Wood
|
|
* 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 MEMORYVECTOR_H
|
|
#define MEMORYVECTOR_H
|
|
|
|
#include "mem/ruby/common/Address.hh"
|
|
|
|
class DirectoryMemory;
|
|
|
|
/**
|
|
* MemoryVector holds memory data (DRAM only)
|
|
*/
|
|
class MemoryVector {
|
|
public:
|
|
MemoryVector();
|
|
MemoryVector(uint32 size);
|
|
~MemoryVector();
|
|
friend class DirectoryMemory;
|
|
|
|
void setSize(uint32 size); // destructive
|
|
|
|
void write(const Address & paddr, uint8* data, int len);
|
|
uint8* read(const Address & paddr, uint8* data, int len);
|
|
|
|
private:
|
|
uint8* getBlockPtr(const PhysAddress & addr);
|
|
|
|
uint32 m_size;
|
|
uint8** m_pages;
|
|
uint32 m_num_pages;
|
|
const uint32 m_page_offset_mask;
|
|
};
|
|
|
|
inline
|
|
MemoryVector::MemoryVector()
|
|
: m_page_offset_mask(4095)
|
|
{
|
|
m_size = 0;
|
|
m_num_pages = 0;
|
|
m_pages = NULL;
|
|
}
|
|
|
|
inline
|
|
MemoryVector::MemoryVector(uint32 size)
|
|
: m_page_offset_mask(4095)
|
|
{
|
|
setSize(size);
|
|
}
|
|
|
|
inline
|
|
MemoryVector::~MemoryVector()
|
|
{
|
|
for (int i=0; i<m_num_pages; i++) {
|
|
if (m_pages[i] != 0) {
|
|
delete [] m_pages[i];
|
|
}
|
|
}
|
|
delete [] m_pages;
|
|
}
|
|
|
|
inline
|
|
void MemoryVector::setSize(uint32 size)
|
|
{
|
|
if (m_pages != NULL){
|
|
for (int i=0; i<m_num_pages; i++) {
|
|
if (m_pages[i] != 0) {
|
|
delete [] m_pages[i];
|
|
}
|
|
}
|
|
delete [] m_pages;
|
|
}
|
|
m_size = size;
|
|
assert(size%4096 == 0);
|
|
m_num_pages = size >> 12;
|
|
m_pages = new uint8*[m_num_pages];
|
|
memset(m_pages, 0, m_num_pages * sizeof(uint8*));
|
|
}
|
|
|
|
inline
|
|
void MemoryVector::write(const Address & paddr, uint8* data, int len)
|
|
{
|
|
assert(paddr.getAddress() + len <= m_size);
|
|
uint32 page_num = paddr.getAddress() >> 12;
|
|
if (m_pages[page_num] == 0) {
|
|
bool all_zeros = true;
|
|
for (int i=0;i<len;i++) {
|
|
if (data[i] != 0) {
|
|
all_zeros = false;
|
|
break;
|
|
}
|
|
}
|
|
if (all_zeros) return;
|
|
m_pages[page_num] = new uint8[4096];
|
|
memset(m_pages[page_num], 0, 4096);
|
|
uint32 offset = paddr.getAddress() & m_page_offset_mask;
|
|
memcpy(&m_pages[page_num][offset], data, len);
|
|
} else {
|
|
memcpy(&m_pages[page_num][paddr.getAddress()&m_page_offset_mask], data, len);
|
|
}
|
|
}
|
|
|
|
inline
|
|
uint8* MemoryVector::read(const Address & paddr, uint8* data, int len)
|
|
{
|
|
assert(paddr.getAddress() + len <= m_size);
|
|
uint32 page_num = paddr.getAddress() >> 12;
|
|
if (m_pages[page_num] == 0) {
|
|
memset(data, 0, len);
|
|
} else {
|
|
memcpy(data, &m_pages[page_num][paddr.getAddress()&m_page_offset_mask], len);
|
|
}
|
|
return data;
|
|
}
|
|
|
|
inline
|
|
uint8* MemoryVector::getBlockPtr(const PhysAddress & paddr)
|
|
{
|
|
uint32 page_num = paddr.getAddress() >> 12;
|
|
if (m_pages[page_num] == 0) {
|
|
m_pages[page_num] = new uint8[4096];
|
|
memset(m_pages[page_num], 0, 4096);
|
|
}
|
|
return &m_pages[page_num][paddr.getAddress()&m_page_offset_mask];
|
|
}
|
|
|
|
#endif // MEMORYVECTOR_H
|