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Diffstat (limited to 'src/arch/arm/kvm/base_cpu.hh')
-rw-r--r-- | src/arch/arm/kvm/base_cpu.hh | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/arch/arm/kvm/base_cpu.hh b/src/arch/arm/kvm/base_cpu.hh new file mode 100644 index 000000000..736153b78 --- /dev/null +++ b/src/arch/arm/kvm/base_cpu.hh @@ -0,0 +1,111 @@ +/* + * Copyright (c) 2012, 2015 ARM Limited + * All rights reserved + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Andreas Sandberg + */ + +#ifndef __ARCH_ARM_KVM_BASE_CPU_HH__ +#define __ARCH_ARM_KVM_BASE_CPU_HH__ + +#include <vector> + +#include "cpu/kvm/base.hh" + +struct BaseArmKvmCPUParams; + +class BaseArmKvmCPU : public BaseKvmCPU +{ + public: + BaseArmKvmCPU(BaseArmKvmCPUParams *params); + virtual ~BaseArmKvmCPU(); + + void startup() M5_ATTR_OVERRIDE; + + protected: + Tick kvmRun(Tick ticks) M5_ATTR_OVERRIDE; + + + /** Cached state of the IRQ line */ + bool irqAsserted; + /** Cached state of the FIQ line */ + bool fiqAsserted; + + protected: + typedef std::vector<uint64_t> RegIndexVector; + + /** + * Get a list of registers supported by getOneReg() and setOneReg(). + * + * This method returns a list of all registers supported by + * kvm. The actual list is only requested the first time this + * method is called. Subsequent calls return a cached copy of the + * register list. + * + * @return Vector of register indexes. + */ + const RegIndexVector &getRegList() const; + + /** + * Tell the kernel to initialize this CPU + * + * The kernel needs to know what type of the CPU that we want to + * emulate. The specified CPU type has to be compatible with the + * host CPU. In practice, we usually call + * KvmVM::kvmArmPreferredTarget() to discover the host CPU. + * + * @param target CPU type to emulate + */ + void kvmArmVCpuInit(const struct kvm_vcpu_init &init); + + private: + std::unique_ptr<struct kvm_reg_list> tryGetRegList(uint64_t nelem) const; + + /** + * Get a list of registers supported by getOneReg() and setOneReg(). + * + * @return False if the number of elements allocated in the list + * is too small to hold the complete register list (the required + * size is written to regs.n in this case). True on success. + */ + bool getRegList(struct kvm_reg_list ®s) const; + + /** + * Cached copy of the list of registers supported by KVM + */ + mutable RegIndexVector _regIndexList; +}; + +#endif // __ARCH_ARM_KVM_BASE_CPU_HH__ |