2020-01-12 16:53:32 +01:00
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//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Desc: Paging memory related functions //
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// //
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// //
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// Copyright © 2018-2019 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY//without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#ifndef _KERNEL_H
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#include <kernel.h>
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#endif
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#ifndef _MM_PAGING_H
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#define _MM_PAGING_H
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//----------------------------------------------------------------------------//
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#define KPAGESIZE (4 * KB)
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#define UPAGESIZE (4 * KB)
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2020-01-18 12:50:36 +01:00
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#define USERSPACE 0x200000000
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2020-01-12 16:53:32 +01:00
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//----------------------------------------------------------------------------//
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// Page table entry
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typedef ulong pte_t;
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// Page directory offset
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typedef pte_t* pde_t;
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// Page directory pointer offset
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typedef pde_t* pdpe_t;
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// Page directory L4 pointer offset
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typedef pdpe_t* pml4_t;
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2020-01-15 16:12:13 +01:00
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enum
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{
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PRESENT = 1 << 0,
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READWRITE = 1 << 1,
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USERMODE = 1 << 2,
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WRITETHR = 1 << 3,
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CACHEDIS = 1 << 4,
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ACCESSED = 1 << 5,
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DIRTY = 1 << 6,
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HUGE = 1 << 7,
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NX = 1UL << 63
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};
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2020-01-12 16:53:32 +01:00
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//----------------------------------------------------------------------------//
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//
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// Paging activation
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//
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void MmInitPaging(void);
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void MmActivatePageHandler(void);
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//
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// Returns the address of the stack guard pages
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//
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void *MmGetStackGuards(char rank);
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//
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// Translate a virtual address into physical address and the opposite
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//
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void *MmTransVirtToPhyAddr(void*);
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void *MmTransPhyToVirtAddr(void* virtualAddr);
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//
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// Set flags to a page
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//
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void MmSetPage(void* virtualAddr, ulong flags);
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void MmUnSetPage(void* virtualAddr, ulong flags);
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//
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// Map a page
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//
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void MmMapPage(void* virtualAddr, void* physicalAddr, ulong flags);
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void MmUnmapPage(void* virtualAddr);
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//
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// Paging misc
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//
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void MmLoadPML4(void *);
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void MmEnableWriteProtect(void);
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void MmDisableWriteProtect(void);
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//----------------------------------------------------------------------------//
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#endif
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