diff options
Diffstat (limited to 'include/asm-xtensa/page.h')
| -rw-r--r-- | include/asm-xtensa/page.h | 50 |
1 files changed, 22 insertions, 28 deletions
diff --git a/include/asm-xtensa/page.h b/include/asm-xtensa/page.h index 1213cde7543..2d6ac21136c 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 @@ typedef struct { unsigned long pgprot; } pgprot_t; /* * 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); |