[evb] 45532: - Fix wrong initialization of different modes and stacks.

Author: evb
Date: Tue Feb  9 19:05:01 2010
New Revision: 45532

URL: http://svn.reactos.org/svn/reactos?rev=45532&view=rev
Log:
- Fix wrong initialization of different modes and stacks.

Modified:
    trunk/reactos/ntoskrnl/ke/arm/boot.s

Modified: trunk/reactos/ntoskrnl/ke/arm/boot.s
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/arm/boot.s?rev=...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/arm/boot.s [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/arm/boot.s [iso-8859-1] Tue Feb  9 19:05:01 2010
@@ -14,48 +14,24 @@
     NESTED_ENTRY KiSystemStartup
     PROLOG_END KiSystemStartup

-    /* Put us in FIQ mode */
-    mrs r3, cpsr
-    orr r3, r1, #CPSR_FIQ_MODE
-    msr cpsr, r3
-    
-    /* Set FIQ stack and registers */
+    /* Put us in FIQ mode, set IRQ stack */
+    msr cpsr_c, #CPSR_FIQ_MODE
     ldr sp, [a1, #LpbInterruptStack]
-    mov r8, #0
-    mov r9, #0
-    mov r10, #0

/* Repeat for IRQ mode */
-    mrs r3, cpsr
-    orr r3, r1, #CPSR_IRQ_MODE
-    msr cpsr, r3
+    msr cpsr_c, #CPSR_IRQ_MODE
     ldr sp, [a1, #LpbInterruptStack]
-    mov r8, #0
-    mov r9, #0
-    mov r10, #0

-    /* Put us in ABORT mode */
-    mrs r3, cpsr
-    orr r3, r1, #CPSR_ABORT_MODE
-    msr cpsr, r3
-       
-    /* Set panic stack */
+    /* Put us in ABORT mode and set the panic stack */
+    msr cpsr_c, #CPSR_ABORT_MODE
     ldr sp, [a1, #LpbPanicStack]

-    /* Put us in UND (Undefined) mode */
-    mrs r3, cpsr
-    orr r3, r1, #CPSR_UND_MODE
-    msr cpsr, r3
-       
-    /* Set panic stack */
+    /* Repeat for UND (Undefined) mode */
+    msr cpsr_c, #CPSR_UND_MODE
     ldr sp, [a1, #LpbPanicStack]

-    /* Put us into SVC (Supervisor) mode */
-    mrs r3, cpsr
-    orr r3, r1, #CPSR_SVC_MODE
-    msr cpsr, r3
-
-    /* Switch to boot kernel stack */
+    /* Put us into SVC (Supervisor) mode and set the kernel stack */
+    msr cpsr_c, #CPSR_SVC_MODE
     ldr sp, [a1, #LpbKernelStack]

/* Go to C code */