Add files via upload
ICache_In_Place
This commit is contained in:
Lyons, Ethan Tyler
committed by
GitHub Enterprise
GitHub Enterprise
parent
6c4cd2468f
commit
1c21110ffe
@@ -15,7 +15,7 @@
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extern "C" {
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void load_file (char * filename);
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void ibus_driver (bool clk, unsigned pc_addr, unsigned * instruction);
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void ibus_driver (bool clk, unsigned o_m_read_addr, unsigned o_m_evict_addr, bool o_m_valid, svLogicVecVal * o_m_writedata, bool o_m_read_or_write, unsigned cache_banks, unsigned num_words_per_block, svLogicVecVal * i_m_readdata, bool * i_m_ready);
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void dbus_driver (bool clk, unsigned o_m_read_addr, unsigned o_m_evict_addr, bool o_m_valid, svLogicVecVal * o_m_writedata, bool o_m_read_or_write, unsigned cache_banks, unsigned num_words_per_block, svLogicVecVal * i_m_readdata, bool * i_m_ready);
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void io_handler (bool clk, bool io_valid, unsigned io_data);
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void gracefulExit(int);
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@@ -24,6 +24,8 @@ extern "C" {
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RAM ram;
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bool refill;
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unsigned refill_addr;
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bool i_refill;
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unsigned i_refill_addr;
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unsigned num_cycles;
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@@ -55,30 +57,125 @@ void load_file(char * filename)
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loadHexImpl(filename, &ram);
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// printf("Filename: %s\n", filename);
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refill = false;
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i_refill = false;
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}
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void ibus_driver(bool clk, unsigned pc_addr, unsigned * instruction)
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{
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// printf("Inside ibus_driver\n");
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void ibus_driver(bool clk, unsigned o_m_read_addr, unsigned o_m_evict_addr, bool o_m_valid, svLogicVecVal * o_m_writedata, bool o_m_read_or_write, unsigned cache_banks, unsigned num_words_per_block, svLogicVecVal * i_m_readdata, bool * i_m_ready)
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{
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// Default values
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{
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s_vpi_vecval * real_i_m_readdata = (s_vpi_vecval *) i_m_readdata;
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(*i_m_ready) = false;
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for (int i = 0; i < cache_banks; i++)
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{
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for (int j = 0; j < num_words_per_block; j++)
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{
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unsigned index = getIndex(i,j, num_words_per_block);
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real_i_m_readdata[index].aval = 0x506070;
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// svGetArrElemPtr2(i_m_readdata, i, j);
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// svPutLogicArrElem2VecVal(i_m_readdata, i, j);
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// i_m_readdata[getIndex(i,j, num_words_per_block)] = 0;
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}
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}
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}
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if (clk)
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{
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(*instruction) = 0;
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// Do nothing on positive edge
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}
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else
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{
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num_cycles++;
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uint32_t curr_inst = 0;
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curr_inst = 0xdeadbeef;
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uint32_t u_pc_addr = (uint32_t) (pc_addr);
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if (i_refill)
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{
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// svGetArrElemPtr2((*i_m_readdata), 0,0);
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// fprintf(stderr, "--------------------------------\n");
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i_refill = false;
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ram.getWord(u_pc_addr, &curr_inst);
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// printf("PC_addr: %x, instruction: %x\n", pc_addr, instruction);
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*i_m_ready = true;
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s_vpi_vecval * real_i_m_readdata = (s_vpi_vecval *) i_m_readdata;
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for (int curr_e = 0; curr_e < (cache_banks*num_words_per_block); curr_e++)
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{
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unsigned new_addr = i_refill_addr + (4*curr_e);
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unsigned addr_without_byte = new_addr >> 2;
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unsigned bits_per_bank = (int)log2(cache_banks);
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// unsigned maskbits_per_bank = calculate_bits_per_bank_num(bits_per_bank);
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unsigned maskbits_per_bank = cache_banks - 1;
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unsigned bank_num = addr_without_byte & maskbits_per_bank;
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unsigned addr_wihtout_bank = addr_without_byte >> bits_per_bank;
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unsigned offset_num = addr_wihtout_bank & (num_words_per_block-1);
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unsigned value;
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ram.getWord(new_addr, &value);
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fprintf(stdout, "-------- (%x) i_m_readdata[%d][%d] (%d) = %x\n", new_addr, bank_num, offset_num, curr_e, value);
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unsigned index = getIndex(bank_num,offset_num, num_words_per_block);
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// fprintf(stderr, "Index: %d (%d, %d) = %x\n", index, bank_num, offset_num, value);
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real_i_m_readdata[index].aval = value;
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}
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}
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else
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{
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if (o_m_valid)
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{
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s_vpi_vecval * real_o_m_writedata = (s_vpi_vecval *) o_m_writedata;
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if (o_m_read_or_write)
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{
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// fprintf(stderr, "++++++++++++++++++++++++++++++++\n");
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for (int curr_e = 0; curr_e < (cache_banks*num_words_per_block); curr_e++)
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{
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unsigned new_addr = (o_m_evict_addr) + (4*curr_e);
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unsigned addr_without_byte = new_addr >> 2;
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unsigned bits_per_bank = (int)log2(cache_banks);
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// unsigned maskbits_per_bank = calculate_bits_per_bank_num(bits_per_bank);
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unsigned maskbits_per_bank = cache_banks - 1;
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unsigned bank_num = addr_without_byte & maskbits_per_bank;
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unsigned addr_wihtout_bank = addr_without_byte >> bits_per_bank;
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unsigned offset_num = addr_wihtout_bank & (num_words_per_block-1);
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// unsigned offset_num = addr_wihtout_bank & 0x3;
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unsigned index = getIndex(bank_num,offset_num, num_words_per_block);
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unsigned new_value = real_o_m_writedata[index].aval;
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// new_value = (unsigned *) svGetArrElemPtr2(o_m_writedata, bank_num, offset_num);
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// new_value = getElem(o_m_writedata, index);
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// unsigned new_value = o_m_writedata[getIndex(bank_num,offset_num, num_words_per_block)];
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ram.writeWord( new_addr, &new_value);
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fprintf(stdout, "+++++++ (%x) writeback[%d][%d] (%d) = %x\n", new_addr, bank_num, offset_num, curr_e, new_value);
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}
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}
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// Respond next cycle
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i_refill = true;
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i_refill_addr = o_m_read_addr;
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}
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}
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(*instruction) = curr_inst;
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}
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}
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