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X86: implements copyRegs() function

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This patch implements the copyRegs() function for the x86 architecture.
The patch assumes that no side effects other than TLB invalidation need
to be considered while copying the registers. This may not hold true in
future.
This commit is contained in:
Nilay Vaish
2011-07-11 16:52:52 -05:00
parent a7dcd19fa0
commit dbde1502cd
1 changed files with 13 additions and 6 deletions
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19
src/arch/x86/utility.cc
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@@ -1,5 +1,6 @@
/*
* Copyright (c) 2007 The Hewlett-Packard Development Company
* Copyright (c) 2011 Advanced Micro Devices, Inc.
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
@@ -42,9 +43,8 @@
#if FULL_SYSTEM
#include "arch/x86/interrupts.hh"
#endif
#include "arch/x86/regs/int.hh"
#include "arch/x86/regs/misc.hh"
#include "arch/x86/regs/segment.hh"
#include "arch/x86/registers.hh"
#include "arch/x86/tlb.hh"
#include "arch/x86/utility.hh"
#include "arch/x86/x86_traits.hh"
#include "cpu/base.hh"
@@ -214,7 +214,9 @@ void startupCPU(ThreadContext *tc, int cpuId)
void
copyMiscRegs(ThreadContext *src, ThreadContext *dest)
{
warn("copyMiscRegs is naively implemented for x86\n");
// This function assumes no side effects other than TLB invalidation
// need to be considered while copying state. That will likely not be
// true in the future.
for (int i = 0; i < NUM_MISCREGS; ++i) {
if ( ( i != MISCREG_CR1 &&
!(i > MISCREG_CR4 && i < MISCREG_CR8) &&
@@ -223,16 +225,21 @@ copyMiscRegs(ThreadContext *src, ThreadContext *dest)
}
dest->setMiscRegNoEffect(i, src->readMiscRegNoEffect(i));
}
dest->getITBPtr()->invalidateAll();
dest->getDTBPtr()->invalidateAll();
}
void
copyRegs(ThreadContext *src, ThreadContext *dest)
{
panic("copyRegs not implemented for x86!\n");
//copy int regs
for (int i = 0; i < NumIntRegs; ++i)
dest->setIntReg(i, src->readIntReg(i));
//copy float regs
for (int i = 0; i < NumFloatRegs; ++i)
dest->setFloatRegBits(i, src->readFloatRegBits(i));
copyMiscRegs(src, dest);
dest->pcState(src->pcState());
}