Use 4Mbyte pages during boot

1 files changed, 5 insertions, 0 deletions

diff --git a/entry.S b/entry.S
index cd6a62b..46fcca6 100644
--- a/entry.S
+++ b/entry.S
@@ -39,6 +39,11 @@ multiboot_header:
 # Multiboot entry point.  Machine is mostly set up.
 .globl multiboot_entry
 multiboot_entry:
+  # Turn on page size extension for 4Mbyte pages
+  movl    %cr4, %eax
+  orl     $(CR4_PSE), %eax
+  movl    %eax, %cr4
+  # Set page directory
   movl    $(V2P_WO(bootpgdir)), %eax
   movl    %eax, %cr3
   # Turn on paging.