tsunami_cchip.hh revision 4762:c94e103c83ad
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; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 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 * Emulation of the Tsunami CChip CSRs 33 */ 34 35#ifndef __TSUNAMI_CCHIP_HH__ 36#define __TSUNAMI_CCHIP_HH__ 37 38#include "base/range.hh" 39#include "dev/alpha/tsunami.hh" 40#include "dev/io_device.hh" 41#include "params/TsunamiCChip.hh" 42 43/** 44 * Tsunami CChip CSR Emulation. This device includes all the interrupt 45 * handling code for the chipset. 46 */ 47class TsunamiCChip : public BasicPioDevice 48{ 49 protected: 50 /** 51 * pointer to the tsunami object. 52 * This is our access to all the other tsunami 53 * devices. 54 */ 55 Tsunami *tsunami; 56 57 /** 58 * The dims are device interrupt mask registers. 59 * One exists for each CPU, the DRIR X DIM = DIR 60 */ 61 uint64_t dim[Tsunami::Max_CPUs]; 62 63 /** 64 * The dirs are device interrupt registers. 65 * One exists for each CPU, the DRIR X DIM = DIR 66 */ 67 uint64_t dir[Tsunami::Max_CPUs]; 68 69 /** 70 * This register contains bits for each PCI interrupt 71 * that can occur. 72 */ 73 uint64_t drir; 74 75 /** Indicator of which CPUs have an IPI interrupt */ 76 uint64_t ipint; 77 78 /** Indicator of which CPUs have an RTC interrupt */ 79 uint64_t itint; 80 81 public: 82 typedef TsunamiCChipParams Params; 83 /** 84 * Initialize the Tsunami CChip by setting all of the 85 * device register to 0. 86 * @param p params struct 87 */ 88 TsunamiCChip(const Params *p); 89 90 const Params * 91 params() const 92 { 93 return dynamic_cast<const Params *>(_params); 94 } 95 96 virtual Tick read(PacketPtr pkt); 97 98 virtual Tick write(PacketPtr pkt); 99 100 /** 101 * post an RTC interrupt to the CPU 102 */ 103 void postRTC(); 104 105 /** 106 * post an interrupt to the CPU. 107 * @param interrupt the interrupt number to post (0-64) 108 */ 109 void postDRIR(uint32_t interrupt); 110 111 /** 112 * clear an interrupt previously posted to the CPU. 113 * @param interrupt the interrupt number to post (0-64) 114 */ 115 void clearDRIR(uint32_t interrupt); 116 117 /** 118 * post an ipi interrupt to the CPU. 119 * @param ipintr the cpu number to clear(bitvector) 120 */ 121 void clearIPI(uint64_t ipintr); 122 123 /** 124 * clear a timer interrupt previously posted to the CPU. 125 * @param itintr the cpu number to clear(bitvector) 126 */ 127 void clearITI(uint64_t itintr); 128 129 /** 130 * request an interrupt be posted to the CPU. 131 * @param ipreq the cpu number to interrupt(bitvector) 132 */ 133 void reqIPI(uint64_t ipreq); 134 135 136 /** 137 * Serialize this object to the given output stream. 138 * @param os The stream to serialize to. 139 */ 140 virtual void serialize(std::ostream &os); 141 142 /** 143 * Reconstruct the state of this object from a checkpoint. 144 * @param cp The checkpoint use. 145 * @param section The section name of this object 146 */ 147 virtual void unserialize(Checkpoint *cp, const std::string §ion); 148 149}; 150 151#endif // __TSUNAMI_CCHIP_HH__ 152