A new macro for setting/clearing bits in the SCTLR.
Signed-off-by: Leif Lindholm <[email protected]>
Suggested-by: Will Deacon <[email protected]>
---
arch/arm/include/asm/assembler.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h
index 5c22851..aba6458 100644
--- a/arch/arm/include/asm/assembler.h
+++ b/arch/arm/include/asm/assembler.h
@@ -383,4 +383,17 @@ THUMB( orr \reg , \reg , #PSR_T_BIT )
#endif
.endm
+#ifdef CONFIG_CPU_CP15
+/* Macro for setting/clearing bits in sctlr */
+ .macro update_sctlr, set:req, clear:req, tmp:req, tmp2:req
+ mrc p15, 0, \tmp, c1, c0, 0
+ ldr \tmp2, =\set
+ orr \tmp, \tmp, \tmp2
+ ldr \tmp2, =\clear
+ mvn \tmp2, \tmp2
+ and \tmp, \tmp, \tmp2
+ mcr p15, 0, \tmp, c1, c0, 0
+ .endm
+#endif
+
#endif /* __ASM_ASSEMBLER_H__ */
--
1.7.10.4
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