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kernel: Rewrite from scratch since the current thing is held by duct tape (lmao)

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This commit is contained in:
RaphProductions 2025-05-18 09:04:25 +02:00
parent d017412af5
commit a1e27c2730
117 changed files with 285 additions and 13622 deletions
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46
kernel/src/mm/vmm.h
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@ -1,46 +0,0 @@
#pragma once
#include <stdint.h>
#define PTE_ADDR_MASK 0x000ffffffffff000
#define PTE_GET_ADDR(VALUE) ((VALUE) & PTE_ADDR_MASK)
#define PTE_GET_FLAGS(VALUE) ((VALUE) & ~PTE_ADDR_MASK)
#define VMM_PRESENT (1 << 0)
#define VMM_WRITABLE (1 << 1)
#define VMM_USER (1 << 2)
#define VMM_NX (1ULL << 63)
typedef char sym[];
extern sym reqs_start_ld;
extern sym reqs_end_ld;
extern sym text_start_ld;
extern sym text_end_ld;
extern sym rodata_start_ld;
extern sym rodata_end_ld;
extern sym data_start_ld;
extern sym data_end_ld;
typedef struct pagemap {
uint64_t *toplevel;
} pagemap_t;
extern pagemap_t *vmm_kernel_pm;
extern pagemap_t *vmm_current_pm;
pagemap_t *vmm_alloc_pm();
void vmm_init();
void vmm_release_pm(pagemap_t *pm);
void vmm_load_pagemap(pagemap_t *pm);
uint64_t vmm_get_flags(pagemap_t *pm, uint64_t vaddr);
uint64_t virt_to_phys(pagemap_t *pagemap, uint64_t virt);
// NOTE: for user mode, please use vmm_map_user instead.
void vmm_map(pagemap_t *pm, uint64_t vaddr, uint64_t paddr, uint64_t flags);
void vmm_map_user(pagemap_t *pm, uint64_t vaddr, uint64_t paddr,
uint64_t flags);
void vmm_unmap(pagemap_t *pm, uint64_t vaddr);