31 lines
886 B
C
31 lines
886 B
C
#pragma once
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#define KERNBASE 0x80000000
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#define PGSIZE 0x1000
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#define PHYSTOP 0x8000000
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#define PGROUNDUP(sz) (((sz)+PGSIZE-1) & ~(PGSIZE-1))
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#define PDXSHIFT 22 // offset of PDX in a linear address
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#define PXMASK 0x3FF
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#ifndef __ASSEMBLER__
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#include <stdint.h>
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#define V2P(a) (((uintptr_t) (a)) - KERNBASE)
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#define P2V(a) ((void *)(((uintptr_t) (a)) + KERNBASE))
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// page directory index
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#define PDX(va) (((uintptr_t)(va) >> PDXSHIFT) & PXMASK)
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#endif
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// Page table/directory entry flags.
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#define PTE_P 0x001 // Present
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#define PTE_W 0x002 // Writeable
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#define PTE_U 0x004 // User
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#define PTE_PWT 0x008 // Write-Through
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#define PTE_PCD 0x010 // Cache-Disable
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#define PTE_A 0x020 // Accessed
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#define PTE_D 0x040 // Dirty
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#define PTE_PS 0x080 // Page Size
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