Files
my-os-project2/kernel/hal/x86_64/vmm.h
2025-09-02 07:51:02 +02:00

64 lines
1.3 KiB
C

#ifndef HAL_VMM_H_
#define HAL_VMM_H_
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
#include "compiler/attr.h"
#define VIRT(X) ((void *)(BOOT_INFO.hhdm_off + (uint64_t)(X)))
typedef struct VasRange {
struct VasRange *next;
uint8_t *virtstart;
uint8_t *physstart;
size_t size;
uint8_t pgflags;
} PACKED VasRange;
struct Proc;
enum {
HAL_PG_PRESENT = 1<<0,
HAL_PG_RW = 1<<1,
HAL_PG_USER = 1<<2,
};
typedef struct {
uint64_t pml4;
uint64_t pml3;
uint64_t pml2;
uint64_t pml1;
} PACKED PgIndex;
typedef struct {
bool present: 1;
bool rw: 1;
bool user: 1;
bool writethrough: 1;
bool cachedisabled: 1;
bool accessed: 1;
bool zero0: 1;
bool size: 1;
bool zero1: 1;
uint8_t avail: 3;
uint64_t addr: 52;
} PACKED Pte;
typedef struct {
Pte ents[512];
} PACKED PgTable;
extern PgTable *KERNEL_CR3;
void hal_vmm_init(void);
void hal_vmm_unmap_page(PgTable *pml4, uint64_t virtaddr, uint64_t physaddr);
void hal_vmm_map_page(PgTable *pml4, uint64_t virtaddr, uint64_t physaddr, uint32_t flags);
PgTable *hal_vmm_current_cr3(void);
void hal_vmm_map_range(PgTable *cr3, void *virtstart, void *physstart, size_t size, uint32_t flags);
void hal_vmm_unmap_range(PgTable *cr3, void *virtstart, void *physstart, size_t size);
PgTable *hal_vmm_userproc_pml4(struct Proc *proc);
#endif // HAL_VMM_H_