[net-next-2.6.git] / arch / powerpc / include / asm / page_32.h

#ifndef _ASM_POWERPC_PAGE_32_H
#define _ASM_POWERPC_PAGE_32_H

#if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0)
#if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0
#error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN"
#endif
#endif

#define VM_DATA_DEFAULT_FLAGS	VM_DATA_DEFAULT_FLAGS32

#ifdef CONFIG_NOT_COHERENT_CACHE
#define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
#endif

#ifdef CONFIG_PTE_64BIT
#define PTE_FLAGS_OFFSET	4	/* offset of PTE flags, in bytes */
#else
#define PTE_FLAGS_OFFSET	0
#endif

#ifdef CONFIG_PPC_256K_PAGES
#define PTE_SHIFT	(PAGE_SHIFT - PTE_T_LOG2 - 2)	/* 1/4 of a page */
#else
#define PTE_SHIFT	(PAGE_SHIFT - PTE_T_LOG2)	/* full page */
#endif

#ifndef __ASSEMBLY__
/*
 * The basic type of a PTE - 64 bits for those CPUs with > 32 bit
 * physical addressing.
 */
#ifdef CONFIG_PTE_64BIT
typedef unsigned long long pte_basic_t;
#else
typedef unsigned long pte_basic_t;
#endif

struct page;
extern void clear_pages(void *page, int order);
static inline void clear_page(void *page) { clear_pages(page, 0); }
extern void copy_page(void *to, void *from);

#include <asm-generic/getorder.h>

#define PGD_T_LOG2	(__builtin_ffs(sizeof(pgd_t)) - 1)
#define PTE_T_LOG2	(__builtin_ffs(sizeof(pte_t)) - 1)

#endif /* __ASSEMBLY__ */

#endif /* _ASM_POWERPC_PAGE_32_H */
Commit	Line	Data
5cd16ee9 ME	1	#ifndef _ASM_POWERPC_PAGE_32_H
	2	#define _ASM_POWERPC_PAGE_32_H
	3
37dd2bad KG	4	#if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0)
	5	#if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0
	6	#error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN"
	7	#endif
	8	#endif
	9
5cd16ee9 ME	10	#define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32
5cd16ee9 ME	11
52142e75	12	#ifdef CONFIG_NOT_COHERENT_CACHE
a6eb9fe1	13	#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
52142e75 BH	14	#endif
52142e75 BH	15
4ee7084e BB	16	#ifdef CONFIG_PTE_64BIT
	17	#define PTE_FLAGS_OFFSET 4 /* offset of PTE flags, in bytes */
	18	#else
	19	#define PTE_FLAGS_OFFSET 0
	20	#endif
	21
e1240122 YT	22	#ifdef CONFIG_PPC_256K_PAGES
	23	#define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2 - 2) /* 1/4 of a page */
	24	#else
ca9153a3	25	#define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2) /* full page */
e1240122	26	#endif
ca9153a3	27
5cd16ee9 ME	28	#ifndef __ASSEMBLY__
	29	/*
	30	* The basic type of a PTE - 64 bits for those CPUs with > 32 bit
4ee7084e	31	* physical addressing.
5cd16ee9 ME	32	*/
	33	#ifdef CONFIG_PTE_64BIT
	34	typedef unsigned long long pte_basic_t;
5cd16ee9 ME	35	#else
5cd16ee9 ME	36	typedef unsigned long pte_basic_t;
5cd16ee9 ME	37	#endif
	38
	39	struct page;
	40	extern void clear_pages(void *page, int order);
	41	static inline void clear_page(void *page) { clear_pages(page, 0); }
	42	extern void copy_page(void to, void from);
	43
5b17e1cd	44	#include <asm-generic/getorder.h>
5cd16ee9	45
ca9153a3 IY	46	#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
	47	#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
	48
5cd16ee9 ME	49	#endif /* __ASSEMBLY__ */
	50
	51	#endif /* _ASM_POWERPC_PAGE_32_H */