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>

2 files changed, 12 insertions, 0 deletions

diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h
index 15f8a092b700..1acd1da36d00 100644
--- a/arch/arm/include/asm/assembler.h
+++ b/arch/arm/include/asm/assembler.h
@@ -127,3 +127,14 @@
 #endif
 #endif
         .endm
+
+#ifdef CONFIG_THUMB2_KERNEL
+        .macro  setmode, mode, reg
+        mov     \reg, #\mode
+        msr     cpsr_c, \reg
+        .endm
+#else
+        .macro  setmode, mode, reg
+        msr     cpsr_c, #\mode
+        .endm
+#endif
diff --git a/arch/arm/include/asm/futex.h b/arch/arm/include/asm/futex.h
index 9ee743b95de8..bfcc15929a7f 100644
--- a/arch/arm/include/asm/futex.h
+++ b/arch/arm/include/asm/futex.h
@@ -99,6 +99,7 @@ futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
         __asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n"
         "1:     ldrt    %0, [%3]\n"
         "       teq     %0, %1\n"
+        "       it      eq      @ explicit IT needed for the 2b label\n"
         "2:     streqt  %2, [%3]\n"
         "3:\n"
         "       .section __ex_table,\"a\"\n"