[PATCH 5/9] arm64: cpufeature: Define helpers for sys_reg id
From: suzuki.poulose@arm.com (Suzuki K Poulose)
Date: 2016-11-24 13:42:08
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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)) + +#define sys_reg_Op0(id) (((id) >> Op0_shift) & Op0_mask) +#define sys_reg_Op1(id) (((id) >> Op1_shift) & Op1_mask) +#define sys_reg_CRn(id) (((id) >> CRn_shift) & CRn_mask) +#define sys_reg_CRm(id) (((id) >> CRm_shift) & CRm_mask) +#define sys_reg_Op2(id) (((id) >> Op2_shift) & Op2_mask) #define SYS_MIDR_EL1 sys_reg(3, 0, 0, 0, 0) #define SYS_MPIDR_EL1 sys_reg(3, 0, 0, 0, 5)
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2.7.4