svn commit: r257905 - projects/altix2/sys/ia64/sgisn

[Marcel Moolenaar]

Author: marcel
Date: Sat Nov  9 23:27:37 2013
New Revision: 257905
URL: http://svnweb.freebsd.org/changeset/base/257905

Log:
  Use an I/O MMU page size of 4KB when the kernel uses a page size less
  than 16KB. Use a 16KB I/O MMU page size otherwise.

Modified:
  projects/altix2/sys/ia64/sgisn/sgisn_pcib.c

Modified: projects/altix2/sys/ia64/sgisn/sgisn_pcib.c
==============================================================================
--- projects/altix2/sys/ia64/sgisn/sgisn_pcib.c	Sat Nov  9 22:28:04 2013	(r257904)
+++ projects/altix2/sys/ia64/sgisn/sgisn_pcib.c	Sat Nov  9 23:27:37 2013	(r257905)
@@ -58,7 +58,11 @@ __FBSDID("$FreeBSD$");
 
 #include <ia64/sgisn/sgisn_pcib.h>
 
-#define	SGISN_PCIB_PAGE_SHIFT	14	/* 16KB; Use 12 for 4KB */
+#if PAGE_SIZE < 16384
+#define	SGISN_PCIB_PAGE_SHIFT	12	/* 4KB */
+#else
+#define	SGISN_PCIB_PAGE_SHIFT	14	/* 16KB */
+#endif
 #define	SGISN_PCIB_PAGE_SIZE	(1UL << SGISN_PCIB_PAGE_SHIFT)
 #define	SGISN_PCIB_PAGE_MASK	(SGISN_PCIB_PAGE_SIZE - 1UL)