From: dave.martin@linaro.org (Dave Martin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 1/5] ARM: omap4: Provide do_wfi() for Thumb-2
Date: Wed, 9 Feb 2011 15:01:19 +0000 [thread overview]
Message-ID: <1297263683-10621-2-git-send-email-dave.martin@linaro.org> (raw)
In-Reply-To: <1297263683-10621-1-git-send-email-dave.martin@linaro.org>
For CONFIG_THUMB2_KERNEL, the existing definition of do_wfi() will
insert invalid code into the instruction stream.
Any assembler which can assemble Thumb-2 is guaranteed to accept
the "wfi" mnemonic, so for the Thumb-2 case, just use the mnemonic.
The ARM case is left as-is.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
---
arch/arm/mach-omap2/include/mach/omap4-common.h | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/include/mach/omap4-common.h b/arch/arm/mach-omap2/include/mach/omap4-common.h
index 5b0270b..de441c0 100644
--- a/arch/arm/mach-omap2/include/mach/omap4-common.h
+++ b/arch/arm/mach-omap2/include/mach/omap4-common.h
@@ -17,8 +17,12 @@
* wfi used in low power code. Directly opcode is used instead
* of instruction to avoid mulit-omap build break
*/
+#ifdef CONFIG_THUMB2_KERNEL
+#define do_wfi() __asm__ __volatile__ ("wfi" : : : "memory")
+#else
#define do_wfi() \
__asm__ __volatile__ (".word 0xe320f003" : : : "memory")
+#endif
#ifdef CONFIG_CACHE_L2X0
extern void __iomem *l2cache_base;
--
1.7.1
next prev parent reply other threads:[~2011-02-09 15:01 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-09 15:01 [PATCH v4 0/5] ARM: omap[34]: Thumb-2 compatibility fixes Dave Martin
2011-02-09 15:01 ` Dave Martin [this message]
2011-02-09 16:19 ` [PATCH v4 1/5] ARM: omap4: Provide do_wfi() for Thumb-2 Nicolas Pitre
2011-02-09 15:01 ` [PATCH v4 2/5] ARM: omap4: Convert END() to ENDPROC() for correct linkage with CONFIG_THUMB2_KERNEL Dave Martin
2011-02-09 15:01 ` [PATCH v4 3/5] ARM: omap3: Remove hand-encoded SMC instructions Dave Martin
2011-02-09 15:01 ` [PATCH v4 4/5] ARM: omap3: Thumb-2 compatibility for sram34xx.S Dave Martin
2011-02-09 15:01 ` [PATCH v4 5/5] ARM: omap3: Thumb-2 compatibility for sleep34xx.S Dave Martin
2011-02-11 23:31 ` [PATCH v4 0/5] ARM: omap[34]: Thumb-2 compatibility fixes Kevin Hilman
2011-02-14 13:17 ` Dave Martin
2011-02-14 15:00 ` Nicolas Pitre
2011-02-14 15:37 ` Dave Martin
2011-02-14 20:10 ` Nicolas Pitre
2011-02-14 23:15 ` Kevin Hilman
2011-02-15 10:45 ` Dave Martin
2011-02-15 16:15 ` Kevin Hilman
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