From: Anton Staaf <robotboy@chromium.org>
Date: Mon, 17 Oct 2011 23:46:04 +0000 (-0700)
Subject: m68k: cache: define ARCH_DMA_MINALIGN for DMA buffer alignment
X-Git-Tag: v2011.12-rc1~473
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=a8fc12eb8e7ff6a97c45d921fdf28dcaaba9c8b6;p=oweals%2Fu-boot.git

m68k: cache: define ARCH_DMA_MINALIGN for DMA buffer alignment

Signed-off-by: Anton Staaf <robotboy@chromium.org>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Jason Jin <jason.jin@freescale.com>
---

diff --git a/arch/m68k/include/asm/cache.h b/arch/m68k/include/asm/cache.h
index 7c84e48471..5c9bb30835 100644
--- a/arch/m68k/include/asm/cache.h
+++ b/arch/m68k/include/asm/cache.h
@@ -207,4 +207,14 @@ void dcache_invalid(void);
 
 #endif
 
+/*
+ * m68k uses 16 byte L1 data cache line sizes.  Use this for DMA buffer
+ * alignment unless the board configuration has specified a new value.
+ */
+#ifdef CONFIG_SYS_CACHELINE_SIZE
+#define ARCH_DMA_MINALIGN	CONFIG_SYS_CACHELINE_SIZE
+#else
+#define ARCH_DMA_MINALIGN	16
+#endif
+
 #endif				/* __CACHE_H */