a928a438b8
Used cppclean to help identify useless includes and removed them. This involved erroneously included headers, but also cases where forward declarations could have been used rather than a full include.
202 lines
6.8 KiB
C++
202 lines
6.8 KiB
C++
/*
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* Copyright (c) 2007 The Hewlett-Packard Development Company
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* All rights reserved.
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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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
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (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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* Authors: Gabe Black
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*/
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#ifndef __ARCH_X86_UTILITY_HH__
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#define __ARCH_X86_UTILITY_HH__
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#include "cpu/static_inst.hh"
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#include "cpu/thread_context.hh"
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#include "sim/full_system.hh"
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namespace X86ISA
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{
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inline PCState
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buildRetPC(const PCState &curPC, const PCState &callPC)
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{
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PCState retPC = callPC;
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retPC.uEnd();
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return retPC;
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}
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uint64_t
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getArgument(ThreadContext *tc, int &number, uint16_t size, bool fp);
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static inline bool
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inUserMode(ThreadContext *tc)
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{
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if (!FullSystem) {
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return true;
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} else {
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HandyM5Reg m5reg = tc->readMiscRegNoEffect(MISCREG_M5_REG);
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return m5reg.cpl == 3;
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}
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}
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/**
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* Function to insure ISA semantics about 0 registers.
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* @param tc The thread context.
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*/
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template <class TC>
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void zeroRegisters(TC *tc);
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void initCPU(ThreadContext *tc, int cpuId);
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void startupCPU(ThreadContext *tc, int cpuId);
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void copyRegs(ThreadContext *src, ThreadContext *dest);
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void copyMiscRegs(ThreadContext *src, ThreadContext *dest);
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void skipFunction(ThreadContext *tc);
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inline void
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advancePC(PCState &pc, const StaticInstPtr &inst)
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{
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inst->advancePC(pc);
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}
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inline uint64_t
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getExecutingAsid(ThreadContext *tc)
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{
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return 0;
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}
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/**
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* Reconstruct the rflags register from the internal gem5 register
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* state.
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*
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* gem5 stores rflags in several different registers to avoid
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* pipeline dependencies. In order to get the true rflags value,
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* we can't simply read the value of MISCREG_RFLAGS. Instead, we
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* need to read out various state from microcode registers and
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* merge that with MISCREG_RFLAGS.
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*
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* @param tc Thread context to read rflags from.
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* @return rflags as seen by the guest.
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*/
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uint64_t getRFlags(ThreadContext *tc);
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/**
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* Set update the rflags register and internal gem5 state.
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*
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* @note This function does not update MISCREG_M5_REG. You might
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* need to update this register by writing anything to
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* MISCREG_M5_REG with side-effects.
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*
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* @see X86ISA::getRFlags()
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*
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* @param tc Thread context to update
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* @param val New rflags value to store in TC
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*/
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void setRFlags(ThreadContext *tc, uint64_t val);
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/**
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* Extract the bit string representing a double value.
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*/
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inline uint64_t getDoubleBits(double val) {
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return *(uint64_t *)(&val);
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}
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/**
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* Convert an x87 tag word to abridged tag format.
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*
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* Convert from the x87 tag representation to the tag abridged
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* representation used in the FXSAVE area. The classic format uses
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* 2 bits per stack position to indicate if a position is valid,
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* zero, special, or empty. The abridged format only stores
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* whether a position is empty or not.
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*
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* @param ftw Tag word in classic x87 format.
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* @return Tag word in the abridged format.
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*/
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uint8_t convX87TagsToXTags(uint16_t ftw);
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/**
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* Convert an x87 xtag word to normal tags format.
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*
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* Convert from the abridged x87 tag representation used in the
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* FXSAVE area to a full x87 tag. The classic format uses 2 bits
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* per stack position to indicate if a position is valid, zero,
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* special, or empty. The abridged format only stores whether a
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* position is empty or not.
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*
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* @todo Reconstruct the correct state of stack positions instead
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* of just valid/invalid.
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*
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* @param ftwx Tag word in the abridged format.
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* @return Tag word in classic x87 format.
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*/
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uint16_t convX87XTagsToTags(uint8_t ftwx);
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/**
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* Generate and updated x87 tag register after a push/pop
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* operation.
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*
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* @note There is currently no support for setting other tags than
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* valid and invalid. A real x87 will set the tag value to zero or
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* special for some special floating point values.
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*
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* @param ftw Current value of the FTW register.
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* @param top Current x87 TOP value.
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* @param spm Stack displacement.
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* @return New value of the FTW register.
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*/
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uint16_t genX87Tags(uint16_t ftw, uint8_t top, int8_t spm);
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/**
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* Load an 80-bit float from memory and convert it to double.
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*
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* @param mem Pointer to an 80-bit float.
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* @return double representation of the 80-bit float.
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*/
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double loadFloat80(const void *mem);
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/**
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* Convert and store a double as an 80-bit float.
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*
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* @param mem Pointer to destination for the 80-bit float.
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* @param value Double precision float to store.
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*/
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void storeFloat80(void *mem, double value);
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}
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#endif // __ARCH_X86_UTILITY_HH__
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