From: shawn.guo@linaro.org (Shawn Guo)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] ARM: add diagnostic register access helpers
Date: Tue, 16 Apr 2013 22:30:42 +0800 [thread overview]
Message-ID: <1366122643-1961-1-git-send-email-shawn.guo@linaro.org> (raw)
The CP15 diagnostic register holds many ARM errata bits. Add a pair of
access helpers for it.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
arch/arm/include/asm/cp15.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/arch/arm/include/asm/cp15.h b/arch/arm/include/asm/cp15.h
index 5ef4d80..0b14dfb 100644
--- a/arch/arm/include/asm/cp15.h
+++ b/arch/arm/include/asm/cp15.h
@@ -82,6 +82,19 @@ static inline void set_copro_access(unsigned int val)
isb();
}
+static inline unsigned int get_diag_reg(void)
+{
+ unsigned int val;
+ asm("mrc p15, 0, %0, c15, c0, 1" : "=r" (val) : : "cc");
+ return val;
+}
+
+static inline void set_diag_reg(unsigned int val)
+{
+ asm volatile("mcr p15, 0, %0, c15, c0, 1" : : "r" (val) : "cc");
+ isb();
+}
+
#endif
#endif
--
1.7.9.5
next reply other threads:[~2013-04-16 14:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-16 14:30 Shawn Guo [this message]
2013-04-16 14:30 ` [PATCH 2/2] ARM: imx: replicate the diagnostic register of boot cpu into secondary cores Shawn Guo
2013-04-16 14:48 ` [PATCH 1/2] ARM: add diagnostic register access helpers Will Deacon
2013-04-16 15:11 ` Shawn Guo
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