103 lines
3.2 KiB
C++
103 lines
3.2 KiB
C++
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/ke/i686/proc.c
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* DESCRIPTION: I686 processor-related functionality for the kernel
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtos.hh>
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/**
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* Gets the processor block for the currently executing processor.
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*
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* @return This routine returns the current processor block read from the FS register.
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*
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* @since XT 1.0
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*/
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XTAPI
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PKPROCESSOR_BLOCK
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KE::Processor::GetCurrentProcessorBlock(VOID)
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{
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/* Get processor block from FS register */
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return (PKPROCESSOR_BLOCK)AR::CpuFunc::ReadFSDualWord(FIELD_OFFSET(KPROCESSOR_BLOCK, Self));
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}
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/**
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* Gets the processor control block for the currently executing processor.
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*
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* @return This routine returns the current processor control block read from the FS register.
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*
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* @since XT 1.0
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*/
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XTAPI
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PKPROCESSOR_CONTROL_BLOCK
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KE::Processor::GetCurrentProcessorControlBlock(VOID)
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{
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return (PKPROCESSOR_CONTROL_BLOCK)AR::CpuFunc::ReadFSDualWord(FIELD_OFFSET(KPROCESSOR_BLOCK, CurrentPrcb));
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}
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/**
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* Gets the number of the currently executing processor.
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*
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* @return This routine returns the zero-indexed processor number.
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*
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* @since XT 1.0
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*/
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XTAPI
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ULONG
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KE::Processor::GetCurrentProcessorNumber(VOID)
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{
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return (ULONG)AR::CpuFunc::ReadFSDualWord(FIELD_OFFSET(KPROCESSOR_BLOCK, CpuNumber));
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}
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/**
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* Gets the current thread running on the currently executing processor.
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*
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* @return This routine returns the address of the current thread object.
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*
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* @since NT 3.5
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*/
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XTAPI
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PKTHREAD
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KE::Processor::GetCurrentThread(VOID)
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{
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return (PKTHREAD)AR::CpuFunc::ReadFSDualWord(FIELD_OFFSET(KPROCESSOR_BLOCK, Prcb.CurrentThread));
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}
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/**
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* Saves the current processor state.
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*
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* @param State
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* Supplies a pointer to the processor state structure.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KE::Processor::SaveProcessorState(OUT PKPROCESSOR_STATE CpuState)
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{
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/* Save CR registers */
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CpuState->SpecialRegisters.Cr0 = AR::CpuFunc::ReadControlRegister(0);
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CpuState->SpecialRegisters.Cr2 = AR::CpuFunc::ReadControlRegister(2);
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CpuState->SpecialRegisters.Cr3 = AR::CpuFunc::ReadControlRegister(3);
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CpuState->SpecialRegisters.Cr4 = AR::CpuFunc::ReadControlRegister(4);
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/* Save DR registers */
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CpuState->SpecialRegisters.KernelDr0 = AR::CpuFunc::ReadDebugRegister(0);
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CpuState->SpecialRegisters.KernelDr1 = AR::CpuFunc::ReadDebugRegister(1);
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CpuState->SpecialRegisters.KernelDr2 = AR::CpuFunc::ReadDebugRegister(2);
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CpuState->SpecialRegisters.KernelDr3 = AR::CpuFunc::ReadDebugRegister(3);
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CpuState->SpecialRegisters.KernelDr6 = AR::CpuFunc::ReadDebugRegister(6);
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CpuState->SpecialRegisters.KernelDr7 = AR::CpuFunc::ReadDebugRegister(7);
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/* Save GDT, IDT, LDT and TaskRegister */
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AR::CpuFunc::StoreGlobalDescriptorTable(&CpuState->SpecialRegisters.Gdtr.Limit);
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AR::CpuFunc::StoreInterruptDescriptorTable(&CpuState->SpecialRegisters.Idtr.Limit);
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AR::CpuFunc::StoreLocalDescriptorTable(&CpuState->SpecialRegisters.Ldtr);
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AR::CpuFunc::StoreTaskRegister(&CpuState->SpecialRegisters.Tr);
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}
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