[ARM] Provide a method to alter the control register

[powerpc.git] / include / asm-arm / system.h

diff --git a/include/asm-arm/system.h b/include/asm-arm/system.h
index f60facc..e160aeb 100644 (file)
--- a/include/asm-arm/system.h
+++ b/include/asm-arm/system.h
@@ -173,6 +173,26 @@ static inline void set_copro_access(unsigned int val)
 extern unsigned long cr_no_alignment;  /* defined in entry-armv.S */
 extern unsigned long cr_alignment;     /* defined in entry-armv.S */
 
+#ifndef CONFIG_SMP
+static inline void adjust_cr(unsigned long mask, unsigned long set)
+{
+       unsigned long flags, cr;
+
+       mask &= ~CR_A;
+
+       set &= mask;
+
+       local_irq_save(flags);
+
+       cr_no_alignment = (cr_no_alignment & ~mask) | set;
+       cr_alignment = (cr_alignment & ~mask) | set;
+
+       set_cr((get_cr() & ~mask) | set);
+
+       local_irq_restore(flags);
+}
+#endif
+
 #define UDBG_UNDEFINED (1 << 0)
 #define UDBG_SYSCALL   (1 << 1)
 #define UDBG_BADABORT  (1 << 2)