Create and load new page directories

2018-02-20 13:41:32 +01:00
parent d483d8f39e
commit 2d0f539e23
6 changed files with 22 additions and 1 deletions
--- a/src/kernel/memory/vmm.c
+++ b/src/kernel/memory/vmm.c
@@ -14,6 +14,13 @@
 #define P2E PT(P3E)[P2_OFFSET(addr)]
 #define P1E PT(P2E)[P1_OFFSET(addr)]

+uint64_t new_P4()
+{
+  uint64_t p4 = pmm_alloc();
+  memcpy(P2V(p4), (void *)kernel_P4, PAGE_SIZE);
+  return p4;
+}
+
 static int page_exists(uint64_t P4, uint64_t addr)
 {
  if(P4 && PRESENT(P4E) && PRESENT(P3E) && PRESENT(P2E))