76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/*
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* Copyright (c) 2026, Chloe M.
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* Provided under the BSD-3 clause.
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*
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* Description: Virtual memory management
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* Author: Chloe M.
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*/
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#ifndef _MM_VM_H_
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#define _MM_VM_H_ 1
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#include <ke/bpal.h>
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#include <hal/vas.h>
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#include <hal/mmu.h>
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#include <ptapi/ptmm.h>
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#include <ptdef.h>
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/*
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* Virtual memory allocation region. This is outside the
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* higher half direct map and thus cannot be converted with
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* PMA_TO_VMA() / VMA_TO_PMA()
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*/
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#define VALLOC_BASE 0xFFFF804000000000
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/*
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* Used to convert physical addresses to virtual addresses
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* and vice versa only when they are within the higher half
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* direct map.
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*/
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#define PMA_TO_VMA(PMA) \
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PTR_OFFSET((VOID *)PMA, KeBpalLoadBase())
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#define VMA_TO_PMA(VMA) \
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(UPTR)PTR_NOFFSET(VMA, KeBpalLoadBase())
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/*
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* Represents a virtual memory range
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*
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* @VirtualBase: Virtual address base
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* @PhysicalBase: Physical address base
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* @Length: Length of memory range
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*/
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typedef struct {
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UPTR VirtualBase;
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UPTR PhysicalBase;
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USIZE Length;
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} MM_RANGE;
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/*
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* Unmap a virtual memory range
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*
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* @Vas: Virtual address space to unmap
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* @Range: Range to unmap
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* @PageSize: Page size to unmap
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*/
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PT_STATUS MmUnmapRange(MMU_VAS *Vas, const MM_RANGE *Range, MMU_PAGESIZE PageSize);
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/*
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* Map a virtual memory range
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*
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* @Vas: Virtual address space to map within
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* @Range: Range to map
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* @Prot: Protection flags to map with
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* @PageSize: Page size to map
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*/
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PT_STATUS MmMapRange(
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MMU_VAS *Vas, const MM_RANGE *Range,
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MM_PROT Prot, MMU_PAGESIZE PageSize
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);
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/*
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* Initialize virtual memory
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*/
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VOID MmVmInit(VOID);
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#endif /* !_MM_VM_H_ */
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