Define helper macros to extract op0, op1, CRn, CRm & op2
for a given sys_reg id.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <redacted>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 arch/arm64/include/asm/sysreg.h | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 6c80b36..488b939 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h

@@ -34,8 +34,27 @@
  *	[11-8]  : CRm
  *	[7-5]   : Op2
  */
+#define Op0_shift	19
+#define Op0_mask	0x3
+#define Op1_shift	16
+#define Op1_mask	0x7
+#define CRn_shift	12
+#define CRn_mask	0xf
+#define CRm_shift	8
+#define CRm_mask	0xf
+#define Op2_shift	5
+#define Op2_mask	0x7
+
 #define sys_reg(op0, op1, crn, crm, op2) \
-	((((op0)&3)<<19)|((op1)<<16)|((crn)<<12)|((crm)<<8)|((op2)<<5))
+	((((op0) & Op0_mask) << Op0_shift) | \
+	 ((op1) << Op1_shift) | ((crn) << CRn_shift) | \
+	 ((crm) << CRm_shift) | ((op2) << Op2_shift))