From: Rob Herring <robherring2@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro
Date: Sun, 2 Dec 2012 21:06:21 -0600 [thread overview]
Message-ID: <1354503982-1124-1-git-send-email-robherring2@gmail.com> (raw)
From: Rob Herring <rob.herring@calxeda.com>
Since wfi instruction is only available on ARMv7, add a conditional
macro for it.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
---
arch/arm/include/asm/system.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 2b28a26..2f6aecd 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -61,6 +61,12 @@
#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
+#ifdef __ARM_ARCH_7A__
+#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
+#else
+#define wfi()
+#endif
+
static inline unsigned int get_cr(void)
{
unsigned int val;
--
1.7.10.4
next reply other threads:[~2012-12-03 3:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-03 3:06 Rob Herring [this message]
2012-12-03 3:06 ` [U-Boot] [PATCH 2/2] ARM: highbank: use wfi macro instead of inline asm Rob Herring
2013-02-03 14:29 ` Albert ARIBAUD
2012-12-03 4:58 ` [U-Boot] [PATCH 1/2] ARM: add wfi assembly macro Marek Vasut
2012-12-03 13:32 ` Rob Herring
2012-12-03 14:39 ` Marek Vasut
2013-02-03 14:29 ` Albert ARIBAUD
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