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/*
* memory.cc
*
* Copyright © 2009 by Tor M. Aamodt, Wilson W. L. Fung and the University of
* British Columbia, Vancouver, BC V6T 1Z4, All Rights Reserved.
*
* THIS IS A LEGAL DOCUMENT BY DOWNLOADING GPGPU-SIM, YOU ARE AGREEING TO THESE
* TERMS AND CONDITIONS.
*
* 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 OWNERS 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.
*
* NOTE: The files libcuda/cuda_runtime_api.c and src/cuda-sim/cuda-math.h
* are derived from the CUDA Toolset available from http://www.nvidia.com/cuda
* (property of NVIDIA). The files benchmarks/BlackScholes/ and
* benchmarks/template/ are derived from the CUDA SDK available from
* http://www.nvidia.com/cuda (also property of NVIDIA). The files from
* src/intersim/ are derived from Booksim (a simulator provided with the
* textbook "Principles and Practices of Interconnection Networks" available
* from http://cva.stanford.edu/books/ppin/). As such, those files are bound by
* the corresponding legal terms and conditions set forth separately (original
* copyright notices are left in files from these sources and where we have
* modified a file our copyright notice appears before the original copyright
* notice).
*
* Using this version of GPGPU-Sim requires a complete installation of CUDA
* which is distributed seperately by NVIDIA under separate terms and
* conditions. To use this version of GPGPU-Sim with OpenCL requires a
* recent version of NVIDIA's drivers which support OpenCL.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the University of British Columbia nor the names of
* its contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 4. This version of GPGPU-SIM is distributed freely for non-commercial use only.
*
* 5. No nonprofit user may place any restrictions on the use of this software,
* including as modified by the user, by any other authorized user.
*
* 6. GPGPU-SIM was developed primarily by Tor M. Aamodt, Wilson W. L. Fung,
* Ali Bakhoda, George L. Yuan, at the University of British Columbia,
* Vancouver, BC V6T 1Z4
*/
#include "memory.h"
#include <stdlib.h>
#include "../debug.h"
template<unsigned BSIZE> memory_space_impl<BSIZE>::memory_space_impl( std::string name, unsigned hash_size )
{
m_name = name;
MEM_MAP_RESIZE(hash_size);
m_log2_block_size = -1;
for( unsigned n=0, mask=1; mask != 0; mask <<= 1, n++ ) {
if( BSIZE & mask ) {
assert( m_log2_block_size == (unsigned)-1 );
m_log2_block_size = n;
}
}
assert( m_log2_block_size != (unsigned)-1 );
}
template<unsigned BSIZE> void memory_space_impl<BSIZE>::write( mem_addr_t addr, size_t length, const void *data, class ptx_thread_info *thd, const ptx_instruction *pI)
{
mem_addr_t index = addr >> m_log2_block_size;
unsigned offset = addr & (BSIZE-1);
unsigned nbytes = length;
assert( (addr+length) <= (index+1)*BSIZE );
m_data[index].write(offset,nbytes,(const unsigned char*)data);
if( !m_watchpoints.empty() ) {
std::map<unsigned,mem_addr_t>::iterator i;
for( i=m_watchpoints.begin(); i!=m_watchpoints.end(); i++ ) {
mem_addr_t wa = i->second;
if( ((addr<=wa) && ((addr+length)>wa)) || ((addr>wa) && (addr < (wa+4))) )
hit_watchpoint(i->first,thd,pI);
}
}
}
template<unsigned BSIZE> void memory_space_impl<BSIZE>::read( mem_addr_t addr, size_t length, void *data ) const
{
mem_addr_t index = addr >> m_log2_block_size;
unsigned offset = addr & (BSIZE-1);
unsigned nbytes = length;
typename map_t::const_iterator i = m_data.find(index);
if( (addr+length) > (index+1)*BSIZE ) {
printf("GPGPU-Sim PTX: ERROR * access to memory \'%s\' is unaligned : addr=0x%x, length=%zu\n",
m_name.c_str(), addr, length);
printf("GPGPU-Sim PTX: (addr+length)=0x%lx > 0x%x=(index+1)*BSIZE, index=0x%x, BSIZE=0x%x\n",
(addr+length),(index+1)*BSIZE, index, BSIZE);
throw 1;
}
if( i == m_data.end() ) {
for( size_t n=0; n < length; n++ )
((unsigned char*)data)[n] = (unsigned char) 0;
//printf("GPGPU-Sim PTX: WARNING reading %zu bytes from unititialized memory at address 0x%x in space %s\n", length, addr, m_name.c_str() );
} else {
i->second.read(offset,nbytes,(unsigned char*)data);
}
}
template<unsigned BSIZE> void memory_space_impl<BSIZE>::print( const char *format, FILE *fout ) const
{
typename map_t::const_iterator i_page;
for (i_page = m_data.begin(); i_page != m_data.end(); ++i_page) {
fprintf(fout, "%s - %#x:", m_name.c_str(), i_page->first);
i_page->second.print(format, fout);
}
}
template<unsigned BSIZE> void memory_space_impl<BSIZE>::set_watch( addr_t addr, unsigned watchpoint )
{
m_watchpoints[watchpoint]=addr;
}
template class memory_space_impl<32>;
template class memory_space_impl<64>;
template class memory_space_impl<8192>;
template class memory_space_impl<16*1024>;
void g_print_memory_space(memory_space *mem, const char *format = "%08x", FILE *fout = stdout)
{
mem->print(format,fout);
}
#ifdef UNIT_TEST
int main(int argc, char *argv[] )
{
int errors_found=0;
memory_space *mem = new memory_space_impl<32>("test",4);
// write address to [address]
for( mem_addr_t addr=0; addr < 16*1024; addr+=4)
mem->write(addr,4,&addr,NULL,NULL);
for( mem_addr_t addr=0; addr < 16*1024; addr+=4) {
unsigned tmp=0;
mem->read(addr,4,&tmp);
if( tmp != addr ) {
errors_found=1;
printf("ERROR ** mem[0x%x] = 0x%x, expected 0x%x\n", addr, tmp, addr );
}
}
for( mem_addr_t addr=0; addr < 16*1024; addr+=1) {
unsigned char val = (addr + 128) % 256;
mem->write(addr,1,&val,NULL,NULL);
}
for( mem_addr_t addr=0; addr < 16*1024; addr+=1) {
unsigned tmp=0;
mem->read(addr,1,&tmp);
unsigned char val = (addr + 128) % 256;
if( tmp != val ) {
errors_found=1;
printf("ERROR ** mem[0x%x] = 0x%x, expected 0x%x\n", addr, tmp, (unsigned)val );
}
}
if( errors_found ) {
printf("SUMMARY: ERRORS FOUND\n");
} else {
printf("SUMMARY: UNIT TEST PASSED\n");
}
}
#endif
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