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iommu/arm-smmu: don't touch the secure STLBIALL register

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Currently we do a STLBIALL when we initialize the SMMU.  However, in
some configurations that register is not supposed to be touched and is
marked as "Secure only" in the spec.  Rip it out.

Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mitchel Humpherys 2014-12-23 17:39:22 +00:00 committed by Will Deacon
parent 518f713624
commit 3c8567d1ca
1 changed files with 0 additions and 2 deletions
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2
drivers/iommu/arm-smmu.c
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@ -127,7 +127,6 @@
#define ID2_PTFS_64K (1 << 14)
/* Global TLB invalidation */
#define ARM_SMMU_GR0_STLBIALL 0x60
#define ARM_SMMU_GR0_TLBIVMID 0x64
#define ARM_SMMU_GR0_TLBIALLNSNH 0x68
#define ARM_SMMU_GR0_TLBIALLH 0x6c
@ -1414,7 +1413,6 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
}
/* Invalidate the TLB, just in case */
writel_relaxed(0, gr0_base + ARM_SMMU_GR0_STLBIALL);
writel_relaxed(0, gr0_base + ARM_SMMU_GR0_TLBIALLH);
writel_relaxed(0, gr0_base + ARM_SMMU_GR0_TLBIALLNSNH);