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Implemented VMM!

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Tom-on
2025-04-08 15:09:57 +02:00
parent ced6cb250f
commit 7c2fcd8e9f
9 changed files with 139 additions and 54 deletions
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kernel/src/paging.c
+5 -5
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@@ -65,7 +65,7 @@ void pag_mapPage(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(1) : pag_tempFrame();
uint32_t tabaddr = pmm_bitmap.ready ? (uint32_t)pmm_allocPage() : pag_tempFrame();
pagedir[pdi] = tabaddr |
PAGE_FLAG_PRESENT | PAGE_FLAG_WRITE | PAGE_FLAG_OWNER | flags;
@@ -122,14 +122,14 @@ uint32_t pag_umapPage(uint32_t vaddr) {
uint32_t pde = pagedir[pdi];
if (remove && pde & PAGE_FLAG_OWNER) {
uint32_t tabaddr = PHYS_ADDR(pde);
pmm_free((void*)tabaddr, 1);
pmm_freePage((void*)tabaddr);
pagedir[pdi] = 0;
}
invalidate(vaddr);
// Free the page frame
if (pte & PAGE_FLAG_OWNER) pmm_free((void*)PHYS_ADDR(pte), 1);
if (pte & PAGE_FLAG_OWNER) pmm_freePage((void*)PHYS_ADDR(pte));
if (prevpd != NULL) {
pag_syncPagedir(); // Sync it to other pagedirs
@@ -221,11 +221,11 @@ void pag_freePagedir(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), 1);
if (pte & PAGE_FLAG_OWNER) pmm_freePage((void*)PHYS_ADDR(pte));
}
memset(pagetab, 0, PAGE_SIZE);
if (pde & PAGE_FLAG_OWNER) pmm_free((void*)PHYS_ADDR(pde), 1);
if (pde & PAGE_FLAG_OWNER) pmm_freePage((void*)PHYS_ADDR(pde));
pd[i] = 0;
}