33 lines
1.2 KiB
C
33 lines
1.2 KiB
C
#pragma once
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#include "types.h"
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/** Frontier between kernel and user space virtual addresses */
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#define PAGING_BASE_USER_ADDRESS (0x40000000) /* 1GB (must be 4MB-aligned) */
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#define PAGING_TOP_USER_ADDRESS (0xFFFFFFFF) /* 4GB - 1B */
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#define PAGING_USER_SPACE_SIZE (0xc0000000) /* 3GB */
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/** Length of the space reserved for the mirroring in the kernel
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virtual space */
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#define PAGING_MIRROR_SIZE (PAGE_SIZE << 10) /* 1 PD = 1024 Page Tables = 4MB */
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/** Virtual address where the mirroring takes place */
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#define PAGING_MIRROR_VADDR \
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(PAGING_BASE_USER_ADDRESS - PAGING_MIRROR_SIZE)
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#define PAGING_MEM_USER (1U << 0)
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#define PAGING_MEM_READ (1U << 1)
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#define PAGING_MEM_WRITE (1U << 2)
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#define PAGING_MEM_EXEC (1U << 3)
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int pagingSetup(paddr_t lowerKernelAddr, paddr_t upperKernelAddr);
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int pageMap(vaddr_t vaddr, paddr_t paddr, int flags);
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int pageUnmap(vaddr_t vaddr);
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unsigned long getNbMappedPage(void);
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int pagingSetCurrentPDPaddr(paddr_t paddrPD);
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paddr_t pagingGetPaddr(vaddr_t vaddr);
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paddr_t pagingGetCurrentPDPaddr();
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int pagingCopyKernelSpace(vaddr_t destVaddrPD, paddr_t destPaddrPD, vaddr_t srcVaddrPD);
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int pagingClearUserContext(vaddr_t vaddr_PD);
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