[mirror_ubuntu-artful-kernel.git] / arch / powerpc / include / asm / page_64.h

#ifndef _ASM_POWERPC_PAGE_64_H
#define _ASM_POWERPC_PAGE_64_H

/*
 * Copyright (C) 2001 PPC64 Team, IBM Corp
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

/*
 * We always define HW_PAGE_SHIFT to 12 as use of 64K pages remains Linux
 * specific, every notion of page number shared with the firmware, TCEs,
 * iommu, etc... still uses a page size of 4K.
 */
#define HW_PAGE_SHIFT		12
#define HW_PAGE_SIZE		(ASM_CONST(1) << HW_PAGE_SHIFT)
#define HW_PAGE_MASK		(~(HW_PAGE_SIZE-1))

/*
 * PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and
 * HW_PAGE_SHIFT, that is 4K pages.
 */
#define PAGE_FACTOR		(PAGE_SHIFT - HW_PAGE_SHIFT)

/* Segment size; normal 256M segments */
#define SID_SHIFT		28
#define SID_MASK		ASM_CONST(0xfffffffff)
#define ESID_MASK		0xfffffffff0000000UL
#define GET_ESID(x)		(((x) >> SID_SHIFT) & SID_MASK)

/* 1T segments */
#define SID_SHIFT_1T		40
#define SID_MASK_1T		0xffffffUL
#define ESID_MASK_1T		0xffffff0000000000UL
#define GET_ESID_1T(x)		(((x) >> SID_SHIFT_1T) & SID_MASK_1T)

#ifndef __ASSEMBLY__
#include <asm/cache.h>

typedef unsigned long pte_basic_t;

static __inline__ void clear_page(void *addr)
{
	unsigned long lines, line_size;

	line_size = ppc64_caches.dline_size;
	lines = ppc64_caches.dlines_per_page;

	__asm__ __volatile__(
	"mtctr	%1	# clear_page\n\
1:      dcbz	0,%0\n\
	add	%0,%0,%3\n\
	bdnz+	1b"
        : "=r" (addr)
        : "r" (lines), "0" (addr), "r" (line_size)
	: "ctr", "memory");
}

extern void copy_page(void *to, void *from);

/* Log 2 of page table size */
extern u64 ppc64_pft_size;

#endif /* __ASSEMBLY__ */

#ifdef CONFIG_PPC_MM_SLICES

#define SLICE_LOW_SHIFT		28
#define SLICE_HIGH_SHIFT	40

#define SLICE_LOW_TOP		(0x100000000ul)
#define SLICE_NUM_LOW		(SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
#define SLICE_NUM_HIGH		(PGTABLE_RANGE >> SLICE_HIGH_SHIFT)

#define GET_LOW_SLICE_INDEX(addr)	((addr) >> SLICE_LOW_SHIFT)
#define GET_HIGH_SLICE_INDEX(addr)	((addr) >> SLICE_HIGH_SHIFT)

#ifndef __ASSEMBLY__

struct slice_mask {
	u16 low_slices;
	u16 high_slices;
};

struct mm_struct;

extern unsigned long slice_get_unmapped_area(unsigned long addr,
					     unsigned long len,
					     unsigned long flags,
					     unsigned int psize,
					     int topdown,
					     int use_cache);

extern unsigned int get_slice_psize(struct mm_struct *mm,
				    unsigned long addr);

extern void slice_init_context(struct mm_struct *mm, unsigned int psize);
extern void slice_set_user_psize(struct mm_struct *mm, unsigned int psize);
extern void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
				  unsigned long len, unsigned int psize);

#define slice_mm_new_context(mm)	((mm)->context.id == MMU_NO_CONTEXT)

#endif /* __ASSEMBLY__ */
#else
#define slice_init()
#ifdef CONFIG_PPC_STD_MMU_64
#define get_slice_psize(mm, addr)	((mm)->context.user_psize)
#define slice_set_user_psize(mm, psize)		\
do {						\
	(mm)->context.user_psize = (psize);	\
	(mm)->context.sllp = SLB_VSID_USER | mmu_psize_defs[(psize)].sllp; \
} while (0)
#else /* CONFIG_PPC_STD_MMU_64 */
#ifdef CONFIG_PPC_64K_PAGES
#define get_slice_psize(mm, addr)	MMU_PAGE_64K
#else /* CONFIG_PPC_64K_PAGES */
#define get_slice_psize(mm, addr)	MMU_PAGE_4K
#endif /* !CONFIG_PPC_64K_PAGES */
#define slice_set_user_psize(mm, psize)	do { BUG(); } while(0)
#endif /* !CONFIG_PPC_STD_MMU_64 */

#define slice_set_range_psize(mm, start, len, psize)	\
	slice_set_user_psize((mm), (psize))
#define slice_mm_new_context(mm)	1
#endif /* CONFIG_PPC_MM_SLICES */

#ifdef CONFIG_HUGETLB_PAGE

#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA

#endif /* !CONFIG_HUGETLB_PAGE */

#define VM_DATA_DEFAULT_FLAGS \
	(is_32bit_task() ? \
	 VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)

/*
 * This is the default if a program doesn't have a PT_GNU_STACK
 * program header entry. The PPC64 ELF ABI has a non executable stack
 * stack by default, so in the absence of a PT_GNU_STACK program header
 * we turn execute permission off.
 */
#define VM_STACK_DEFAULT_FLAGS32	(VM_READ | VM_WRITE | VM_EXEC | \
					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#define VM_STACK_DEFAULT_FLAGS64	(VM_READ | VM_WRITE | \
					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#define VM_STACK_DEFAULT_FLAGS \
	(is_32bit_task() ? \
	 VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)

#include <asm-generic/getorder.h>

#endif /* _ASM_POWERPC_PAGE_64_H */
Commit	Line	Data
5cd16ee9 ME	1	#ifndef _ASM_POWERPC_PAGE_64_H
	2	#define _ASM_POWERPC_PAGE_64_H
	3
	4	/*
	5	* Copyright (C) 2001 PPC64 Team, IBM Corp
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version
	10	* 2 of the License, or (at your option) any later version.
	11	*/
	12
	13	/*
	14	* We always define HW_PAGE_SHIFT to 12 as use of 64K pages remains Linux
	15	* specific, every notion of page number shared with the firmware, TCEs,
	16	* iommu, etc... still uses a page size of 4K.
	17	*/
	18	#define HW_PAGE_SHIFT 12
	19	#define HW_PAGE_SIZE (ASM_CONST(1) << HW_PAGE_SHIFT)
	20	#define HW_PAGE_MASK (~(HW_PAGE_SIZE-1))
	21
	22	/*
	23	* PAGE_FACTOR is the number of bits factor between PAGE_SHIFT and
	24	* HW_PAGE_SHIFT, that is 4K pages.
	25	*/
	26	#define PAGE_FACTOR (PAGE_SHIFT - HW_PAGE_SHIFT)
	27
1189be65	28	/* Segment size; normal 256M segments */
5cd16ee9	29	#define SID_SHIFT 28
16a15a30	30	#define SID_MASK ASM_CONST(0xfffffffff)
5cd16ee9 ME	31	#define ESID_MASK 0xfffffffff0000000UL
	32	#define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK)
	33
1189be65 PM	34	/* 1T segments */
	35	#define SID_SHIFT_1T 40
	36	#define SID_MASK_1T 0xffffffUL
	37	#define ESID_MASK_1T 0xffffff0000000000UL
	38	#define GET_ESID_1T(x) (((x) >> SID_SHIFT_1T) & SID_MASK_1T)
	39
5cd16ee9 ME	40	#ifndef __ASSEMBLY__
	41	#include <asm/cache.h>
	42
	43	typedef unsigned long pte_basic_t;
	44
	45	static __inline__ void clear_page(void *addr)
	46	{
	47	unsigned long lines, line_size;
	48
	49	line_size = ppc64_caches.dline_size;
	50	lines = ppc64_caches.dlines_per_page;
	51
	52	__asm__ __volatile__(
	53	"mtctr %1 # clear_page\n\
	54	1: dcbz 0,%0\n\
	55	add %0,%0,%3\n\
	56	bdnz+ 1b"
	57	: "=r" (addr)
	58	: "r" (lines), "0" (addr), "r" (line_size)
	59	: "ctr", "memory");
	60	}
	61
d988f0e3	62	extern void copy_page(void to, void from);
5cd16ee9 ME	63
	64	/* Log 2 of page table size */
	65	extern u64 ppc64_pft_size;
	66
5cd16ee9 ME	67	#endif /* __ASSEMBLY__ */
5cd16ee9 ME	68
d0f13e3c	69	#ifdef CONFIG_PPC_MM_SLICES
5cd16ee9	70
d0f13e3c BH	71	#define SLICE_LOW_SHIFT 28
d0f13e3c BH	72	#define SLICE_HIGH_SHIFT 40
5cd16ee9	73
d0f13e3c BH	74	#define SLICE_LOW_TOP (0x100000000ul)
	75	#define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
	76	#define SLICE_NUM_HIGH (PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
5cd16ee9	77
d0f13e3c BH	78	#define GET_LOW_SLICE_INDEX(addr) ((addr) >> SLICE_LOW_SHIFT)
d0f13e3c BH	79	#define GET_HIGH_SLICE_INDEX(addr) ((addr) >> SLICE_HIGH_SHIFT)
5cd16ee9	80
d0f13e3c BH	81	#ifndef __ASSEMBLY__
	82
	83	struct slice_mask {
	84	u16 low_slices;
	85	u16 high_slices;
	86	};
	87
	88	struct mm_struct;
5cd16ee9	89
d0f13e3c BH	90	extern unsigned long slice_get_unmapped_area(unsigned long addr,
	91	unsigned long len,
	92	unsigned long flags,
	93	unsigned int psize,
	94	int topdown,
	95	int use_cache);
5cd16ee9	96
d0f13e3c BH	97	extern unsigned int get_slice_psize(struct mm_struct *mm,
d0f13e3c BH	98	unsigned long addr);
5cd16ee9	99
d0f13e3c BH	100	extern void slice_init_context(struct mm_struct *mm, unsigned int psize);
d0f13e3c BH	101	extern void slice_set_user_psize(struct mm_struct *mm, unsigned int psize);
3a8247cc PM	102	extern void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
	103	unsigned long len, unsigned int psize);
	104
ee7a2aa3	105	#define slice_mm_new_context(mm) ((mm)->context.id == MMU_NO_CONTEXT)
d0f13e3c	106
d0f13e3c BH	107	#endif /* __ASSEMBLY__ */
	108	#else
	109	#define slice_init()
57e2a99f	110	#ifdef CONFIG_PPC_STD_MMU_64
3a8247cc	111	#define get_slice_psize(mm, addr) ((mm)->context.user_psize)
e8ff0646 SR	112	#define slice_set_user_psize(mm, psize) \
	113	do { \
	114	(mm)->context.user_psize = (psize); \
	115	(mm)->context.sllp = SLB_VSID_USER \| mmu_psize_defs[(psize)].sllp; \
	116	} while (0)
57e2a99f BH	117	#else /* CONFIG_PPC_STD_MMU_64 */
	118	#ifdef CONFIG_PPC_64K_PAGES
	119	#define get_slice_psize(mm, addr) MMU_PAGE_64K
	120	#else /* CONFIG_PPC_64K_PAGES */
	121	#define get_slice_psize(mm, addr) MMU_PAGE_4K
	122	#endif /* !CONFIG_PPC_64K_PAGES */
	123	#define slice_set_user_psize(mm, psize) do { BUG(); } while(0)
	124	#endif /* !CONFIG_PPC_STD_MMU_64 */
	125
3a8247cc PM	126	#define slice_set_range_psize(mm, start, len, psize) \
3a8247cc PM	127	slice_set_user_psize((mm), (psize))
e8ff0646	128	#define slice_mm_new_context(mm) 1
d0f13e3c BH	129	#endif /* CONFIG_PPC_MM_SLICES */
	130
	131	#ifdef CONFIG_HUGETLB_PAGE
	132
d0f13e3c	133	#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
5cd16ee9 ME	134
	135	#endif /* !CONFIG_HUGETLB_PAGE */
	136
5cd16ee9	137	#define VM_DATA_DEFAULT_FLAGS \
cab175f9	138	(is_32bit_task() ? \
5cd16ee9 ME	139	VM_DATA_DEFAULT_FLAGS32 : VM_DATA_DEFAULT_FLAGS64)
	140
	141	/*
	142	* This is the default if a program doesn't have a PT_GNU_STACK
	143	* program header entry. The PPC64 ELF ABI has a non executable stack
25985edc	144	* stack by default, so in the absence of a PT_GNU_STACK program header
5cd16ee9 ME	145	* we turn execute permission off.
	146	*/
	147	#define VM_STACK_DEFAULT_FLAGS32 (VM_READ \| VM_WRITE \| VM_EXEC \| \
	148	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
	149
	150	#define VM_STACK_DEFAULT_FLAGS64 (VM_READ \| VM_WRITE \| \
	151	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
	152
	153	#define VM_STACK_DEFAULT_FLAGS \
cab175f9	154	(is_32bit_task() ? \
5cd16ee9 ME	155	VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
5cd16ee9 ME	156
5b17e1cd	157	#include <asm-generic/getorder.h>
5cd16ee9 ME	158
5cd16ee9 ME	159	#endif /* _ASM_POWERPC_PAGE_64_H */