1/* 2 * Copyright (c) 2004-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 11 unchanged lines hidden (view full) --- 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * |
28 * Authors: Ali Saidi |
29 */ 30 31/** @file 32 * Declaration of a fake device. 33 */ 34 35#ifndef __ISA_FAKE_HH__ 36#define __ISA_FAKE_HH__ 37 38#include "base/range.hh" 39#include "dev/io_device.hh" 40#include "dev/tsunami.hh" 41#include "mem/packet.hh" 42 43/** |
44 * IsaFake is a device that returns, BadAddr, 1 or 0 on all reads and 45 * rites. It is meant to be placed at an address range |
46 * so that an mcheck doesn't occur when an os probes a piece of hw |
47 * that doesn't exist (e.g. UARTs1-3), or catch requests in the memory system 48 * that have no responders.. |
49 */ 50class IsaFake : public BasicPioDevice 51{ 52 public: 53 struct Params : public BasicPioDevice::Params 54 { 55 Addr pio_size; |
56 bool retBadAddr; 57 uint8_t retData; |
58 }; 59 protected: 60 const Params *params() const { return (const Params*)_params; } |
61 uint64_t retData; |
62 63 public: 64 /** 65 * The constructor for Tsunmami Fake just registers itself with the MMU. 66 * @param p params structure 67 */ 68 IsaFake(Params *p); 69 --- 5 unchanged lines hidden (view full) --- 75 virtual Tick read(PacketPtr pkt); 76 77 /** 78 * All writes are simply ignored. 79 * @param pkt The memory request. 80 * @param data the data to not write. 81 */ 82 virtual Tick write(PacketPtr pkt); |
83 |
84 void init(); |
85}; 86 |
87#endif // __ISA_FAKE_HH__ |