map_page: add support for mapping 1GiB pages

Signed-off-by: Andy-Python-Programmer <andypythonappdeveloper@gmail.com>
2022-01-27 10:59:16 +11:00 · 2022-01-27 10:59:16 +11:00 · a218423b9c
commit a218423b9c
parent 7a1e3cb35c
2 changed files with 8 additions and 1 deletions
--- a/stage23/mm/vmm.c
+++ b/stage23/mm/vmm.c
@ -65,6 +65,12 @@ level5:
    pml4 = get_next_level(pml5, pml5_entry);
 level4:
    pml3 = get_next_level(pml4, pml4_entry);
+
+    if (pg_size == Size1GiB) {
+        pml3[pml3_entry] = (pt_entry_t)(phys_addr | flags | (1 << 7));
+        return;
+    }
+
    pml2 = get_next_level(pml3, pml3_entry);

    if (pg_size == Size2MiB) {
--- a/stage23/mm/vmm.h
+++ b/stage23/mm/vmm.h
@ -15,7 +15,8 @@ typedef struct {

 enum page_size {
    Size4KiB,
-    Size2MiB
+    Size2MiB,
+    Size1GiB
 };

 void vmm_assert_nx(void);