66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
#ifndef VMM_VMM_H_
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#define VMM_VMM_H_
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#include <stdint.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include "compiler/attr.h"
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#define VMM_PAGE_SIZE 0x1000
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#define VIRT(X) ((void *)(BOOT_INFO.hhdm_off + (uint64_t)(X)))
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typedef struct VasRange {
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struct VasRange *next;
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uint8_t *virtstart;
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uint8_t *physstart;
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size_t size;
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uint8_t pgflags;
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} PACKED VasRange;
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enum {
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VMM_PG_PRESENT = 1<<0,
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VMM_PG_RW = 1<<1,
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VMM_PG_USER = 1<<2,
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};
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typedef struct {
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uint16_t pml4;
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uint16_t pml3;
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uint16_t pml2;
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uint16_t pml1;
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} PACKED PgIndex;
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typedef struct {
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bool present: 1;
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bool rw: 1;
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bool user: 1;
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bool writethrough: 1;
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bool cachedisabled: 1;
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bool accessed: 1;
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bool dirty: 1;
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bool hugepage: 1;
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bool global: 1;
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uint8_t avail: 3;
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uint64_t addr: 40;
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uint16_t osdef: 11;
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bool nx: 1;
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} PACKED Pte;
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typedef struct {
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Pte ents[512];
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} PACKED PgTable;
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extern uint64_t KERNEL_CR3;
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void vmm_init(void);
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void vmm_unmap_page(uint64_t cr3phys, uint64_t virtaddr);
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void vmm_map_page(uint64_t cr3phys, uint64_t virtaddr, uint64_t physaddr, uint32_t flags);
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uint64_t vmm_current_cr3(void);
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void vmm_map_range(uint64_t cr3phys, void *virtstart, void *physstart, size_t size, uint32_t flags);
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void vmm_unmap_range(uint64_t cr3phys, void *virtstart, void *physstart, size_t size);
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uint64_t vmm_userproc_pml4_phys(void);
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#endif // VMM_VMM_H_
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