[XTENSA] Use the generic version of get_order
Use the generic version of get_order for processor configurations that
don't have the 'nsa/nsau' instructions.
Signed-off-by: Chris Zankel <chris@zankel.net>
diff --git a/include/asm-xtensa/page.h b/include/asm-xtensa/page.h
index 1213cde..2d6ac21 100644
--- a/include/asm-xtensa/page.h
+++ b/include/asm-xtensa/page.h
@@ -1,11 +1,11 @@
/*
- * linux/include/asm-xtensa/page.h
+ * include/asm-xtensa/page.h
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version2 as
* published by the Free Software Foundation.
*
- * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
*/
#ifndef _XTENSA_PAGE_H
@@ -14,6 +14,11 @@
#ifdef __KERNEL__
#include <asm/processor.h>
+#include <asm/types.h>
+
+/*
+ * Fixed TLB translations in the processor.
+ */
#define XCHAL_KSEG_CACHED_VADDR 0xd0000000
#define XCHAL_KSEG_BYPASS_VADDR 0xd8000000
@@ -26,13 +31,13 @@
*/
#define PAGE_SHIFT 12
-#define PAGE_SIZE (1 << PAGE_SHIFT)
+#define PAGE_SIZE (__XTENSA_UL_CONST(1) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE - 1) & PAGE_MASK)
#define PAGE_OFFSET XCHAL_KSEG_CACHED_VADDR
-#define MAX_MEM_PFN XCHAL_KSEG_SIZE
-#define PGTABLE_START 0x80000000
+#define MAX_MEM_PFN XCHAL_KSEG_SIZE
+#define PGTABLE_START 0x80000000
#ifdef __ASSEMBLY__
@@ -58,34 +63,23 @@
/*
* Pure 2^n version of get_order
+ * Use 'nsau' instructions if supported by the processor or the generic version.
*/
-static inline int get_order(unsigned long size)
+#if XCHAL_HAVE_NSA
+
+static inline __attribute_const__ int get_order(unsigned long size)
{
- int order;
-#ifndef XCHAL_HAVE_NSU
- unsigned long x1, x2, x4, x8, x16;
-
- size = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
- x1 = size & 0xAAAAAAAA;
- x2 = size & 0xCCCCCCCC;
- x4 = size & 0xF0F0F0F0;
- x8 = size & 0xFF00FF00;
- x16 = size & 0xFFFF0000;
- order = x2 ? 2 : 0;
- order += (x16 != 0) * 16;
- order += (x8 != 0) * 8;
- order += (x4 != 0) * 4;
- order += (x1 != 0);
-
- return order;
-#else
- size = (size - 1) >> PAGE_SHIFT;
- asm ("nsau %0, %1" : "=r" (order) : "r" (size));
- return 32 - order;
-#endif
+ int lz;
+ asm ("nsau %0, %1" : "=r" (lz) : "r" ((size - 1) >> PAGE_SHIFT));
+ return 32 - lz;
}
+#else
+
+# include <asm-generic/page.h>
+
+#endif
struct page;
extern void clear_page(void *page);