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From: Ian Lepore <ian@FreeBSD.org>
Date: Sun, 10 Dec 2017 23:06:45 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r326754 - head/stand/uboot/lib
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Author: ian
Date: Sun Dec 10 23:06:45 2017
New Revision: 326754
URL: https://svnweb.freebsd.org/changeset/base/326754

Log:
  When building for arm arches, set PKGALIGN to the max cache line size
  supported by the arch, to meet u-boot's requirement that I/O be done
  in cache-aligned chunks.
  
  PR:		223977

Modified:
  head/stand/uboot/lib/libuboot.h

Modified: head/stand/uboot/lib/libuboot.h
==============================================================================
--- head/stand/uboot/lib/libuboot.h	Sun Dec 10 23:03:13 2017	(r326753)
+++ head/stand/uboot/lib/libuboot.h	Sun Dec 10 23:06:45 2017	(r326754)
@@ -45,9 +45,16 @@ struct uboot_devdesc
 #define d_disk d_kind.disk
 
 /*
- * Default network packet alignment in memory
+ * Default network packet alignment in memory.  On arm arches packets must be
+ * aligned to cacheline boundaries.
  */
+#if defined(__aarch64__)
+#define	PKTALIGN	128
+#elif defined(__arm__)
+#define	PKTALIGN	64
+#else
 #define	PKTALIGN	32
+#endif
 
 int uboot_getdev(void **vdev, const char *devspec, const char **path);
 char *uboot_fmtdev(void *vdev);