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From: Macpaul Lin <macpaul@andestech.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 2/3] nds32: cache: define ARCH_DMA_MINALIGN for DMA buffer alignment
Date: Mon, 24 Oct 2011 17:46:32 +0800	[thread overview]
Message-ID: <1319449593-2427-2-git-send-email-macpaul@andestech.com> (raw)
In-Reply-To: <1319449593-2427-1-git-send-email-macpaul@andestech.com>

Add ARCH_DMA_MINALIGN definition to asm/cache.h

Signed-off-by: Macpaul Lin <macpaul@andestech.com>
---
 arch/nds32/include/asm/cache.h |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/nds32/include/asm/cache.h b/arch/nds32/include/asm/cache.h
index d769196..fc22c7b 100644
--- a/arch/nds32/include/asm/cache.h
+++ b/arch/nds32/include/asm/cache.h
@@ -51,4 +51,15 @@ DEFINE_GET_SYS_REG(DCM_CFG);
 #define DCM_CFG_OFF_DSZ	6	/* D-cache line size */
 #define DCM_CFG_MSK_DSZ	(0x7UL << DCM_CFG_OFF_DSZ)
 
+/*
+ * The current upper bound for NDS32 L1 data cache line sizes is 32 bytes.
+ * We use that value for aligning DMA buffers unless the board config has
+ * specified an alternate cache line size.
+ */
+#ifdef CONFIG_SYS_CACHELINE_SIZE
+#define ARCH_DMA_MINALIGN	CONFIG_SYS_CACHELINE_SIZE
+#else
+#define ARCH_DMA_MINALIGN	32
+#endif
+
 #endif /* _ASM_CACHE_H */
-- 
1.7.3.5

  reply	other threads:[~2011-10-24  9:46 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-24  9:46 [U-Boot] [PATCH 1/3] nds32: Use getenv_ulong() in place of getenv(), strtoul Macpaul Lin
2011-10-24  9:46 ` Macpaul Lin [this message]
2011-10-24 17:16   ` [U-Boot] [PATCH 2/3] nds32: cache: define ARCH_DMA_MINALIGN for DMA buffer alignment Anton Staaf
2011-10-28  4:46     ` 馬克泡
2011-10-31  0:40       ` Mike Frysinger
2011-11-01  3:28         ` 馬克泡
2011-11-01  4:35     ` 馬克泡
2011-10-24  9:46 ` [U-Boot] [PATCH 3/3] nds32: asm/io.h: add __iormb and __iowmb support Macpaul Lin
2011-10-24 13:38   ` Marek Vasut
2011-10-24 13:50     ` 馬克泡
2011-10-25  8:20       ` 馬克泡
2011-10-25  8:29         ` Marek Vasut
2011-10-25 10:16           ` 馬克泡
2011-10-26  5:19             ` 馬克泡
2011-10-26  5:55               ` Graeme Russ
2011-10-27  3:23                 ` 馬克泡
2011-10-27  3:39                   ` Graeme Russ
2011-10-25 11:03           ` [U-Boot] [PATCH v2] nds32: asm/io.h: add __iormb __iowmb and inline io support Macpaul Lin
2011-11-01  4:37             ` 馬克泡
2011-11-01  4:33 ` [U-Boot] [PATCH 1/3] nds32: Use getenv_ulong() in place of getenv(), strtoul 馬克泡

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