31 lines
816 B
C
31 lines
816 B
C
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#include "paging.h"
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void paging_enable(){
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int *page_dir=(int*)PAGING_DIR_LOCATION;
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int *page_table=(int*)PAGING_TABLE_LOCATION;
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// Init page directory
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for(int i=0;i<1024;i++)
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page_dir[i]=0;
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page_dir[0]=(int)page_table;
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page_dir[0] |=7; // Permissions
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// Init page table 0
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int addr_offset=0;
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for(int i=0;i<1024;i++){
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page_table[i]=addr_offset;
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page_table[i]|=7; // Permission
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addr_offset+=4096; // 4Ko pages
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}
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// Turns on paging
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asm(
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"movl %0, %%eax \n\t"
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"movl %%eax, %%cr3 \n\t" // Configure page table location
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"movl %%cr0, %%eax \n\t"
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"orl %1, %%eax \n\t"
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"movl %%eax, %%cr0 \n\t" // Turn on paging
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:: "i" (PAGING_DIR_LOCATION), "i" (PAGING_CR0_BIT)
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);
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}
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