47 lines
No EOL
993 B
C
47 lines
No EOL
993 B
C
#ifndef PAGING_H
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#define PAGING_H
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#define PAGING_CR0_BIT 0x80000000
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#define PAGING_PAGE_SIZE 4096
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#define PAGING_MAX_PAGES 2048 // At least 1024 for the kernel
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#if PAGING_MAX_PAGES%1024>0
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#define PAGING_MAX_DIR_ENTRY PAGING_MAX_PAGES/1024+1
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#else
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#define PAGING_MAX_DIR_ENTRY PAGING_MAX_PAGES/1024
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#endif
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#define PAGING_PADDR(entry) ((int*)(((u32)entry)&0xFFFFF000))
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#define PAGING_ENTRY_POINT_VIRT (1024*PAGING_PAGE_SIZE)
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#define PAGING_ENTRY_POINT_PHY(page_dir) ((int*)(((int*)((((int*)page_dir)[1])&0xFFFFF000))[0]&0xFFFFF000))
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/**
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* Configure and enable paging
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*/
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void paging_enable();
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/**
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* Allocate a new page and return its address
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*/
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char* paging_allocate_next_page();
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/**
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* Set usage status of a page
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*/
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void paging_set_usage(int addr,char state);
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/**
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* Create a new page directory containing
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* p pages.
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*/
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int *paging_allocate(int p);
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/**
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* Simple dump
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*/
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void paging_dump(int min,int max);
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/**
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* Handler of page fault
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*/
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void paging_page_fault();
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#endif |