Index: arch/ppc32/src/boot/boot.S
===================================================================
--- arch/ppc32/src/boot/boot.S	(revision 12c7f27b4fc44ac2d4bb7ef6ea741ea7a8ad1dff)
+++ arch/ppc32/src/boot/boot.S	(revision 7dd1787643001828803b90e39bfe964bead011fa)
@@ -35,16 +35,19 @@
 kernel_image_start:
 
-	# load temporary stack
+	# load temporal kernel stack
 	
-	lis sp, end_stack@ha
-	addi sp, sp, end_stack@l
+	lis sp, kernel_stack@ha
+	addi sp, sp, kernel_stack@l
+	
+	# set kernel stack for interrupt handling
+	
+	mr r31, sp
+	subis r31, r31, 0x8000
+	mtsprg0 r31
 	
 	# r3 contains physical address of bootinfo_t
 	# r4 contains size of bootinfo_t
 	
-	lis r31, 0x80000000@ha
-	addi r31, r31, 0x80000000@l
-	
-	add r3, r3, r31
+	addis r3, r3, 0x8000
 
 	lis r31, bootinfo@ha
@@ -73,4 +76,6 @@
 .section K_DATA_START, "aw", @progbits
 
+.align 12
+kernel_stack_bottom:
 	.space TEMP_STACK_SIZE
-end_stack:
+kernel_stack: