2009-07-07 00:49:47 +02:00
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#ifndef MEMORYVECTOR_H
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#define MEMORYVECTOR_H
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#include "mem/ruby/common/Address.hh"
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class DirectoryMemory;
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/**
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* MemoryVector holds memory data (DRAM only)
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*/
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class MemoryVector {
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public:
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MemoryVector();
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MemoryVector(uint32 size);
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~MemoryVector();
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friend class DirectoryMemory;
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void setSize(uint32 size); // destructive
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void write(const Address & paddr, uint8* data, int len);
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uint8* read(const Address & paddr, uint8* data, int len);
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2009-11-13 16:43:39 +01:00
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private:
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uint8* getBlockPtr(const PhysAddress & addr);
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2009-07-07 00:49:47 +02:00
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uint32 m_size;
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2009-11-13 16:43:39 +01:00
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uint8** m_pages;
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uint32 m_num_pages;
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const uint32 m_page_offset_mask;
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2009-07-07 00:49:47 +02:00
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};
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inline
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MemoryVector::MemoryVector()
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2009-11-13 16:43:39 +01:00
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: m_page_offset_mask(4095)
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2009-07-07 00:49:47 +02:00
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{
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m_size = 0;
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2009-11-13 16:43:39 +01:00
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m_num_pages = 0;
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m_pages = NULL;
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2009-07-07 00:49:47 +02:00
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}
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inline
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MemoryVector::MemoryVector(uint32 size)
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2009-11-13 16:43:39 +01:00
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: m_page_offset_mask(4095)
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2009-07-07 00:49:47 +02:00
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{
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2009-11-13 16:43:39 +01:00
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setSize(size);
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2009-07-07 00:49:47 +02:00
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}
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inline
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MemoryVector::~MemoryVector()
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{
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2009-11-13 16:43:39 +01:00
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for (int i=0; i<m_num_pages; i++) {
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if (m_pages[i] != 0) {
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delete [] m_pages[i];
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}
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}
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delete [] m_pages;
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2009-07-07 00:49:47 +02:00
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}
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inline
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void MemoryVector::setSize(uint32 size)
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{
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2009-11-13 16:43:39 +01:00
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if (m_pages != NULL){
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for (int i=0; i<m_num_pages; i++) {
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if (m_pages[i] != 0) {
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delete [] m_pages[i];
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}
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}
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delete [] m_pages;
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}
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2009-07-07 00:49:47 +02:00
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m_size = size;
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2009-11-13 16:43:39 +01:00
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assert(size%4096 == 0);
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m_num_pages = size >> 12;
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m_pages = new uint8*[m_num_pages];
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memset(m_pages, 0, m_num_pages * sizeof(uint8*));
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2009-07-07 00:49:47 +02:00
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}
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inline
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void MemoryVector::write(const Address & paddr, uint8* data, int len)
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{
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assert(paddr.getAddress() + len <= m_size);
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2009-11-13 16:43:39 +01:00
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uint32 page_num = paddr.getAddress() >> 12;
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if (m_pages[page_num] == 0) {
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bool all_zeros = true;
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for (int i=0;i<len;i++) {
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if (data[i] != 0) {
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all_zeros = false;
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break;
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}
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}
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if (all_zeros) return;
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m_pages[page_num] = new uint8[4096];
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memset(m_pages[page_num], 0, 4096);
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uint32 offset = paddr.getAddress() & m_page_offset_mask;
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memcpy(&m_pages[page_num][offset], data, len);
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} else {
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memcpy(&m_pages[page_num][paddr.getAddress()&m_page_offset_mask], data, len);
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}
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2009-07-07 00:49:47 +02:00
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}
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inline
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uint8* MemoryVector::read(const Address & paddr, uint8* data, int len)
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{
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assert(paddr.getAddress() + len <= m_size);
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2009-11-13 16:43:39 +01:00
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uint32 page_num = paddr.getAddress() >> 12;
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if (m_pages[page_num] == 0) {
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memset(data, 0, len);
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} else {
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memcpy(data, &m_pages[page_num][paddr.getAddress()&m_page_offset_mask], len);
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}
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2009-07-07 00:49:47 +02:00
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return data;
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}
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inline
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2009-11-13 16:43:39 +01:00
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uint8* MemoryVector::getBlockPtr(const PhysAddress & paddr)
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2009-07-07 00:49:47 +02:00
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{
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2009-11-13 16:43:39 +01:00
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uint32 page_num = paddr.getAddress() >> 12;
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if (m_pages[page_num] == 0) {
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m_pages[page_num] = new uint8[4096];
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memset(m_pages[page_num], 0, 4096);
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}
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return &m_pages[page_num][paddr.getAddress()&m_page_offset_mask];
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2009-07-07 00:49:47 +02:00
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}
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#endif // MEMORYVECTOR_H
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