base_cpu.hh revision 10860
1/* 2 * Copyright (c) 2012, 2015 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Andreas Sandberg 38 */ 39 40#ifndef __ARCH_ARM_KVM_BASE_CPU_HH__ 41#define __ARCH_ARM_KVM_BASE_CPU_HH__ 42 43#include <vector> 44 45#include "cpu/kvm/base.hh" 46 47struct BaseArmKvmCPUParams; 48 49class BaseArmKvmCPU : public BaseKvmCPU 50{ 51 public: 52 BaseArmKvmCPU(BaseArmKvmCPUParams *params); 53 virtual ~BaseArmKvmCPU(); 54 55 void startup() M5_ATTR_OVERRIDE; 56 57 protected: 58 Tick kvmRun(Tick ticks) M5_ATTR_OVERRIDE; 59 60 61 /** Cached state of the IRQ line */ 62 bool irqAsserted; 63 /** Cached state of the FIQ line */ 64 bool fiqAsserted; 65 66 protected: 67 typedef std::vector<uint64_t> RegIndexVector; 68 69 /** 70 * Get a list of registers supported by getOneReg() and setOneReg(). 71 * 72 * This method returns a list of all registers supported by 73 * kvm. The actual list is only requested the first time this 74 * method is called. Subsequent calls return a cached copy of the 75 * register list. 76 * 77 * @return Vector of register indexes. 78 */ 79 const RegIndexVector &getRegList() const; 80 81 /** 82 * Tell the kernel to initialize this CPU 83 * 84 * The kernel needs to know what type of the CPU that we want to 85 * emulate. The specified CPU type has to be compatible with the 86 * host CPU. In practice, we usually call 87 * KvmVM::kvmArmPreferredTarget() to discover the host CPU. 88 * 89 * @param target CPU type to emulate 90 */ 91 void kvmArmVCpuInit(const struct kvm_vcpu_init &init); 92 93 private: 94 std::unique_ptr<struct kvm_reg_list> tryGetRegList(uint64_t nelem) const; 95 96 /** 97 * Get a list of registers supported by getOneReg() and setOneReg(). 98 * 99 * @return False if the number of elements allocated in the list 100 * is too small to hold the complete register list (the required 101 * size is written to regs.n in this case). True on success. 102 */ 103 bool getRegList(struct kvm_reg_list ®s) const; 104 105 /** 106 * Cached copy of the list of registers supported by KVM 107 */ 108 mutable RegIndexVector _regIndexList; 109}; 110 111#endif // __ARCH_ARM_KVM_BASE_CPU_HH__ 112