Changeset 6ac14a70 in mainline for kernel/arch/arm32/src/start.S

Timestamp:

2009-07-28T12:47:31Z (15 years ago)

Author:

Vineeth Pillai <vineethrp@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

5e73815

Parents:

7038f55

Message:

ARM port for development board integratorcp(ARM926EJ core module).

File:

• kernel/arch/arm32/src/start.S (modified) (1 diff)

kernel/arch/arm32/src/start.S

@@ -36 +36 @@
 
 kernel_image_start:
-        
+
+        # initialize Stack pointer for exception modes
+        mrs r4, cpsr
+        bic r4, r4, #0x1f
+
+        #FIQ Mode
+        orr r3, r4, #0x11
+        msr cpsr_c, r3
+        ldr sp, =exc_stack
+
+        #IRQ Mode
+        orr r3, r4, #0x12
+        msr cpsr_c, r3
+        ldr sp, =exc_stack
+
+        #ABORT Mode
+        orr r3, r4, #0x17
+        msr cpsr_c, r3
+        ldr sp, =exc_stack
+
+        #UNDEFINED Mode
+        orr r3, r4, #0x1b
+        msr cpsr_c, r3
+        ldr sp, =exc_stack
+
         # switch to supervisor mode
-        mrs r3, cpsr
-        bic r3, r3, #0x1f
-        orr r3, r3, #0x13
+        orr r3, r4, #0x13
         msr cpsr_c, r3