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/*
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* Copyright (c) 2014, Aleksander Osman
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package ao486.module.memory.test;
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import ao486.module.memory.AvalonListener;
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import ao486.module.memory.GlobalListener;
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import ao486.module.memory.Input;
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import ao486.module.memory.Listener;
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import ao486.module.memory.Output;
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import ao486.module.memory.PrefetchListener;
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import ao486.module.memory.Test;
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import java.util.LinkedList;
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import java.util.Random;
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public class TestPrefetchNoCache extends Test implements Listener, PrefetchListener.PrefetchInterface {
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void go(long seed) throws Exception {
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random = new Random(seed);
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avalon = new AvalonListener(random, this);
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prefetch = new PrefetchListener();
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global = new GlobalListener();
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finish_cycle = 0;
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counter = 1;
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code_stream = new LinkedList<>();
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long cs_base = 0xFFFFFFF0L;
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long eip = 0x00000;
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long cpl = 0;
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long cs_limit= 0x00000 + 16;
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for(int i=0; i<16; i++) {
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long b = random.nextInt() & 0xFF;
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avalon.set_memory(cs_base + eip + i, b, 1);
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code_stream.add((byte)b);
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//System.out.printf("[%x] = %x\n", cs_base + eip + i, b);
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}
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prefetch.prefetch(cpl, eip, cs_base, cs_limit, this);
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//----------
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LinkedList<Listener> listeners = new LinkedList<>();
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listeners.add(avalon);
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listeners.add(prefetch);
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listeners.add(global);
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listeners.add(this);
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run_simulation(listeners);
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}
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@Override
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public void prefetched(int cycle, long value, long size) throws Exception {
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for(int i=0; i<size; i++) {
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if(code_stream.isEmpty()) throw new Exception("Code stream is empty: i: " + i);
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byte expected = code_stream.pop();
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if(expected != (byte)value) throw new Exception("Invalid prefetched code: i: " + i + String.format(", expected: %x, value: %x", expected, (byte)value));
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//System.out.printf("expected: %x == value: %x, size: %d\n", expected, (byte)value, code_stream.size());
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value >>= 8;
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}
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}
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@Override
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public void prefetch_page_fault(int cycle, long cr2, long error_code) throws Exception {
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throw new Exception("prefetch pf.");
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}
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@Override
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public void prefetch_gp_fault(int cycle) throws Exception {
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if(code_stream.size() > 0) throw new Exception("prefetch gp fault before limit reached.");
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counter++;
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if(counter >= 100) {
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finish_cycle = cycle+1;
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return;
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}
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do {
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long cs_base = random.nextLong() & 0xFFFFFFFFL;
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long eip = random.nextLong() & 0xFFFFFFFFL;
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long cpl = 0;
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long cs_limit= eip + random.nextInt(512);
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if(cs_limit >= 0x100000L) while((cs_limit & 0xFFFL) != 0xFFFL) cs_limit++;
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System.out.printf("cs_limit: %x\n", cs_limit);
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if(cs_base + eip >= 0x100000000L) continue;
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for(int i=0; i<cs_limit - eip + 1; i++) {
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long b = random.nextInt() & 0xFF;
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avalon.set_memory(cs_base + eip + i, b, 1);
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code_stream.add((byte)b);
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//System.out.printf("[%x] = %x\n", cs_base + eip + i, b);
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}
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prefetch.prefetch(cpl, eip, cs_base, cs_limit, this);
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break;
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}while(true);
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global.set_reset(true, false, false, false);
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reset_cycle = cycle+1;
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}
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@Override
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public void set_input(int cycle, Input input) throws Exception {
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if(cycle >= finish_cycle && finish_cycle > 0) input.finished = true;
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if(cycle >= reset_cycle && reset_cycle > 0) {
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global.set_reset(false, false, false, false);
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reset_cycle = 0;
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}
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}
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@Override
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public void get_output(int cycle, Output output) throws Exception {
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}
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LinkedList<Byte> code_stream;
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int counter;
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Random random;
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int finish_cycle;
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int reset_cycle;
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AvalonListener avalon;
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GlobalListener global;
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PrefetchListener prefetch;
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//-------------
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public static void main(String args[]) throws Exception {
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TestPrefetchNoCache test1 = new TestPrefetchNoCache();
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for(int i=0; i<1; i++) {
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test1.go(i);
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System.out.println("Run " + i + " complete.");
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}
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System.out.println("[Main] thread end.");
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}
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}
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