120 lines
3.2 KiB
C++
120 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/mm/kpool.cc
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* DESCRIPTION: Kernel pool memory management
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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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* Allocates a new kernel stack.
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*
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* @param Stack
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* Supplies a pointer to the memory area that will contain a new kernel stack.
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*
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* @param LargeStack
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* Determines whether the stack is large or small.
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*
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* @param SystemNode
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* Specifies a preferred node used for new stack on multi-processor systems.
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*
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* @return This routine returns a status code.
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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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XTSTATUS
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MM::KernelPool::AllocateKernelStack(IN PVOID *Stack,
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IN BOOLEAN LargeStack,
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IN UCHAR SystemNode)
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{
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UNIMPLEMENTED;
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return STATUS_NOT_IMPLEMENTED;
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}
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/**
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* Allocates a buffer for structures needed by a processor and assigns it to a corresponding CPU.
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*
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* @param CpuNumber
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* Specifies the zero-indexed CPU number as an owner of the allocated structures.
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*
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* @param StructuresData
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* Supplies a pointer to the memory area that will contain the allocated buffer.
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*
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* @return This routine returns a status code.
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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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XTSTATUS
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MM::KernelPool::AllocateProcessorStructures(IN ULONG CpuNumber,
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OUT PVOID *StructuresData)
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{
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PKPROCESSOR_BLOCK ProcessorBlock;
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PVOID ProcessorStructures;
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UINT_PTR Address;
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/* Not implemented yet, this is just a hack */
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UNIMPLEMENTED;
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/* Assign memory for processor structures from preallocated buffer */
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ProcessorStructures = &ProcessorStructuresData[CpuNumber - 1];
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/* Make sure all structures are zeroed */
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RTL::Memory::ZeroMemory(ProcessorStructures, KPROCESSOR_STRUCTURES_SIZE);
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/* Align address to page size boundary and find a space for processor block */
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Address = ROUND_UP((UINT_PTR)ProcessorStructures, MM_PAGE_SIZE);
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ProcessorBlock = (PKPROCESSOR_BLOCK)((PUCHAR)Address + (2 * KERNEL_STACK_SIZE) + (GDT_ENTRIES * sizeof(KGDTENTRY)));
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/* Store processor number in the processor block */
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ProcessorBlock->CpuNumber = CpuNumber;
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/* Return pointer to the processor structures */
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*StructuresData = ProcessorStructures;
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/* Return success */
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return STATUS_SUCCESS;
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}
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/**
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* Destroys a kernel stack and frees page table entry.
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*
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* @param Stack
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* Supplies a pointer to the memory area containing a kernel stack.
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*
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* @param LargeStack
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* Determines whether the stack is large or small.
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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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MM::KernelPool::FreeKernelStack(IN PVOID Stack,
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IN BOOLEAN LargeStack)
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{
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UNIMPLEMENTED;
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}
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/**
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* Destroys an unused set of processor structures.
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*
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* @param StructuresData
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* Supplies a pointer to the memory area containing the allocated buffer.
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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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MM::KernelPool::FreeProcessorStructures(IN PVOID StructuresData)
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{
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UNIMPLEMENTED;
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}
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