linux-kernel - [PATCH 3/3] arm: macros for wfe, sev instructions

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Date:	Fri, 23 Jul 2010 11:58:03 -0700
From:	Jeff Ohlstein <johlstei@...eaurora.org>
To:	Russell King <linux@....linux.org.uk>
Cc:	linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Daniel Walker <dwalker@...eaurora.org>,
	Steve Muckle <smuckle@...eaurora.org>,
	Jeff Ohlstein <johlstei@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>
Subject: [PATCH 3/3] arm: macros for wfe, sev instructions

From: Steve Muckle <smuckle@...eaurora.org>

The wait for event and send event instructions may be called from C code
such as boot or power management routines.

Signed-off-by: Steve Muckle <smuckle@...eaurora.org>
Signed-off-by: Jeff Ohlstein <johlstei@...eaurora.org>
---
 arch/arm/include/asm/processor.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h
index 7bed3da..4262664 100644
--- a/arch/arm/include/asm/processor.h
+++ b/arch/arm/include/asm/processor.h
@@ -97,6 +97,11 @@ unsigned long get_wchan(struct task_struct *p);
 #define cpu_relax()			barrier()
 #endif
 
+#if defined(CONFIG_CPU_32v6K) || __LINUX_ARM_ARCH__ >= 7
+#define sev() __asm__("sev")
+#define wfe() __asm__("wfe")
+#endif
+
 /*
  * Create a new kernel thread
  */
-- 
1.7.1.1

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