Thumb-2: Implementation of the unified start-up and exceptions code
This patch implements the ARM/Thumb-2 unified kernel start-up and
exception handling code.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index cc87e17..b16393d 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -34,7 +34,7 @@
*/
.section ".text.head", "ax"
ENTRY(stext)
- msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
+ setmode PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9 @ ensure svc mode
@ and irqs disabled
#ifndef CONFIG_CPU_CP15
ldr r9, =CONFIG_PROCESSOR_ID
@@ -50,8 +50,10 @@
ldr r13, __switch_data @ address to jump to after
@ the initialization is done
- adr lr, __after_proc_init @ return (PIC) address
- add pc, r10, #PROCINFO_INITFUNC
+ adr lr, BSYM(__after_proc_init) @ return (PIC) address
+ ARM( add pc, r10, #PROCINFO_INITFUNC )
+ THUMB( add r12, r10, #PROCINFO_INITFUNC )
+ THUMB( mov pc, r12 )
ENDPROC(stext)
/*
@@ -82,7 +84,8 @@
mcr p15, 0, r0, c1, c0, 0 @ write control reg
#endif /* CONFIG_CPU_CP15 */
- mov pc, r13 @ clear the BSS and jump
+ mov r3, r13
+ mov pc, r3 @ clear the BSS and jump
@ to start_kernel
ENDPROC(__after_proc_init)
.ltorg