Fix memory mapping for LAIC and setup it's paging

1 files changed, 12 insertions, 0 deletions

diff --git a/kernel/src/asm/boot.asm b/kernel/src/asm/boot.asm
index 6449d66..87de35f 100644
--- a/kernel/src/asm/boot.asm
+++ b/kernel/src/asm/boot.asm
@@ -92,6 +92,16 @@ setup_page_tables:
     or eax, 0b11 ; present + writable
     mov [p3_table], eax
 
+    ; map third P3 entry to APIC P2 table 
+    mov eax, apic_p2_table
+    or eax, 0b11 ; present + writable
+    mov [p3_table + 24], eax
+
+    ; map apic memory space without caching
+    mov eax, 0xFEE00000 + 0b10000111 ; huge + no caching + writable + present
+    mov [apic_p2_table + 4024], eax
+    
+    ; map first page without caching
     mov eax, 0b10000111 ; huge + no caching + writable + present
     mov [p2_table], eax
 	
@@ -169,6 +179,8 @@ p3_table:
 	resb 4096
 p2_table:
 	resb 4096
+apic_p2_table:
+	resb 4096
 
 alignb 4096 * 512  ; align memory into huge memory page
 stack_bottom: