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Tom-on
2025-04-30 18:27:18 +02:00
parent f4b10746d6
commit a48fa362d0
10 changed files with 404 additions and 43 deletions
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kernel/src/paging.c
+7 -7
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@@ -68,7 +68,7 @@ void pag_map(uint32_t vaddr, uint32_t paddr, uint32_t flags) {
// Allocate a pagetab if it didn't exist
if (!(pagedir[pdi] & PAGE_FLAG_PRESENT)) {
uint32_t tabaddr = pmm_bitmap.ready ? (uint32_t)pmm_alloc() : pag_temp_frame();
uint32_t tabaddr = pmm_bitmap.ready ? pmm_alloc() : pag_temp_frame();
pagedir[pdi] = tabaddr |
PAGE_FLAG_PRESENT | PAGE_FLAG_WRITE | PAGE_FLAG_OWNER | flags;
@@ -125,14 +125,14 @@ uint32_t pag_umap(uint32_t vaddr) {
uint32_t pde = pagedir[pdi];
if (remove && pde & PAGE_FLAG_OWNER) {
uint32_t tabaddr = PHYS_ADDR(pde);
pmm_free((void*)tabaddr);
pmm_free(tabaddr);
pagedir[pdi] = 0;
}
invalidate(vaddr);
// Free the page frame
if (pte & PAGE_FLAG_OWNER) pmm_free((void*)PHYS_ADDR(pte));
if (pte & PAGE_FLAG_OWNER) pmm_free(PHYS_ADDR(pte));
if (prevpd != NULL) {
pag_sync_pagedir(); // Sync it to other pagedirs
@@ -142,13 +142,13 @@ uint32_t pag_umap(uint32_t vaddr) {
return pte;
}
void* pag_virt_to_phys(uint32_t vaddr) {
uint32_t pag_virt_to_phys(uint32_t vaddr) {
uint32_t pdi = vaddr >> 22;
uint32_t pti = vaddr >> 12 & 0x3FF;
uint32_t* pagetab = PAGETAB(pdi);
return (void*)((pagetab[pti] & ~0xFFF) + ((uint32_t)vaddr & 0xFFF));
return (pagetab[pti] & ~0xFFF) + ((uint32_t)vaddr & 0xFFF);
}
uint32_t* pag_get_pagedir() {
@@ -224,11 +224,11 @@ void pag_free_pagedir(uint32_t* pagedir) {
for (size_t j = 0; j < 1024; j++) {
uint32_t pte = pagetab[j];
if (pte & PAGE_FLAG_OWNER) pmm_free((void*)PHYS_ADDR(pte));
if (pte & PAGE_FLAG_OWNER) pmm_free(PHYS_ADDR(pte));
}
memset(pagetab, 0, PAGE_SIZE);
if (pde & PAGE_FLAG_OWNER) pmm_free((void*)PHYS_ADDR(pde));
if (pde & PAGE_FLAG_OWNER) pmm_free(PHYS_ADDR(pde));
pd[i] = 0;
}