60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
#ifndef _PAGETABLE_H_
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#define _PAGETABLE_H_
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#include "../types.h"
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typedef struct {
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uint8_t present:1 = 0;
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uint8_t write:1 = 0;
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uint8_t user:1 = 0;
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uint8_t pwt:1 = 0;
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uint8_t cache_disable:1 = 0;
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uint8_t accessed:1 = 0;
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uint8_t dirty:1 = 0;
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uint8_t pat:1 = 0;
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uint8_t rsvd_0:4 = 0;
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uint64_t address:39 = 0;
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uint16_t rsvd_1:10 = 0;
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uint8_t execute_disable:1 = 0;
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} __attribute__((__packed__)) pagetable_entry_t;
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typedef struct {
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pagetable_entry_t entries[512];
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} pagetable_t;
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//typedef struct {
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// uint8_t present:1 = 0;
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// uint8_t write:1 = 0;
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// uint8_t user:1 = 0;
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// uint8_t pwt:1 = 0;
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// uint8_t cache_disable:1 = 0;
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// uint8_t accessed:1 = 0;
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// uint8_t rsvd_0:6 = 0;
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// uint64_t address:39 = 0;
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// uint16_t rsvd_1:10 = 0;
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// uint8_t execute_disable:1 = 0;
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//} __attribute__((__packed__)) pagedirectory_entry_t;
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typedef struct {
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alignas(4096) pagetable_t l4;
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alignas(4096) pagetable_t l3;
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alignas(4096) pagetable_t l2;
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alignas(4096) pagetable_t l1[64];
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alignas(4096) pagetable_t l2_apic;
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alignas(4096) pagetable_t ioapic;
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alignas(4096) pagetable_t lapic;
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} four_lvl_paging_t;
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void create_basic_page_table(uintptr_t base);
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void load_cr3( void* cr3_value );
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//typedef struct {
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// same
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//} pagedirectory_pointertable_entry_t;
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//typedef struct {
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// same
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//} PML4_entry_t;
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#endif
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