[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-powerpc / pgalloc-64.h

#ifndef _ASM_POWERPC_PGALLOC_64_H
#define _ASM_POWERPC_PGALLOC_64_H
/*
 * 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.
 */

#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/cpumask.h>
#include <linux/percpu.h>

#ifndef CONFIG_PPC_SUBPAGE_PROT
static inline void subpage_prot_free(pgd_t *pgd) {}
#endif

extern struct kmem_cache *pgtable_cache[];

#define PGD_CACHE_NUM		0
#define PUD_CACHE_NUM		1
#define PMD_CACHE_NUM		1
#define HUGEPTE_CACHE_NUM	2
#define PTE_NONCACHE_NUM	3  /* from GFP rather than kmem_cache */

static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
	return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
}

static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
	subpage_prot_free(pgd);
	kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
}

#ifndef CONFIG_PPC_64K_PAGES

#define pgd_populate(MM, PGD, PUD)	pgd_set(PGD, PUD)

static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
	return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
				GFP_KERNEL|__GFP_REPEAT);
}

static inline void pud_free(struct mm_struct *mm, pud_t *pud)
{
	kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
}

static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
{
	pud_set(pud, (unsigned long)pmd);
}

#define pmd_populate(mm, pmd, pte_page) \
	pmd_populate_kernel(mm, pmd, page_address(pte_page))
#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
#define pmd_pgtable(pmd) pmd_page(pmd)


#else /* CONFIG_PPC_64K_PAGES */

#define pud_populate(mm, pud, pmd)	pud_set(pud, (unsigned long)pmd)

static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
				       pte_t *pte)
{
	pmd_set(pmd, (unsigned long)pte);
}

#define pmd_populate(mm, pmd, pte_page) \
	pmd_populate_kernel(mm, pmd, page_address(pte_page))
#define pmd_pgtable(pmd) pmd_page(pmd)

#endif /* CONFIG_PPC_64K_PAGES */

static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
{
	return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
				GFP_KERNEL|__GFP_REPEAT);
}

static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
{
	kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
}

static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
					  unsigned long address)
{
        return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
}

static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
					unsigned long address)
{
	struct page *page;
	pte_t *pte;

	pte = pte_alloc_one_kernel(mm, address);
	if (!pte)
		return NULL;
	page = virt_to_page(pte);
	pgtable_page_ctor(page);
	return page;
}

static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
	free_page((unsigned long)pte);
}

static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
	pgtable_page_dtor(ptepage);
	__free_page(ptepage);
}

#define PGF_CACHENUM_MASK	0x3

typedef struct pgtable_free {
	unsigned long val;
} pgtable_free_t;

static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
						unsigned long mask)
{
	BUG_ON(cachenum > PGF_CACHENUM_MASK);

	return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
}

static inline void pgtable_free(pgtable_free_t pgf)
{
	void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
	int cachenum = pgf.val & PGF_CACHENUM_MASK;

	if (cachenum == PTE_NONCACHE_NUM)
		free_page((unsigned long)p);
	else
		kmem_cache_free(pgtable_cache[cachenum], p);
}

extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);

#define __pte_free_tlb(tlb,ptepage)	\
do { \
	pgtable_page_dtor(ptepage); \
	pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
		PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \
} while (0)
#define __pmd_free_tlb(tlb, pmd) 	\
	pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
		PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
#ifndef CONFIG_PPC_64K_PAGES
#define __pud_free_tlb(tlb, pud)	\
	pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
		PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
#endif /* CONFIG_PPC_64K_PAGES */

#define check_pgt_cache()	do { } while (0)

#endif /* _ASM_POWERPC_PGALLOC_64_H */
Commit	Line	Data
f88df14b DG	1	#ifndef _ASM_POWERPC_PGALLOC_64_H
	2	#define _ASM_POWERPC_PGALLOC_64_H
	3	/*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*/
	9
	10	#include <linux/mm.h>
	11	#include <linux/slab.h>
	12	#include <linux/cpumask.h>
	13	#include <linux/percpu.h>
	14
fa28237c PM	15	#ifndef CONFIG_PPC_SUBPAGE_PROT
	16	static inline void subpage_prot_free(pgd_t *pgd) {}
	17	#endif
	18
f88df14b DG	19	extern struct kmem_cache *pgtable_cache[];
f88df14b DG	20
517e2263 HD	21	#define PGD_CACHE_NUM 0
	22	#define PUD_CACHE_NUM 1
	23	#define PMD_CACHE_NUM 1
	24	#define HUGEPTE_CACHE_NUM 2
	25	#define PTE_NONCACHE_NUM 3 /* from GFP rather than kmem_cache */
f88df14b DG	26
	27	static inline pgd_t pgd_alloc(struct mm_struct mm)
	28	{
	29	return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
	30	}
	31
5e541973	32	static inline void pgd_free(struct mm_struct mm, pgd_t pgd)
f88df14b	33	{
fa28237c	34	subpage_prot_free(pgd);
f88df14b DG	35	kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
	36	}
	37
	38	#ifndef CONFIG_PPC_64K_PAGES
	39
	40	#define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD)
	41
	42	static inline pud_t pud_alloc_one(struct mm_struct mm, unsigned long addr)
	43	{
	44	return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
	45	GFP_KERNEL\|__GFP_REPEAT);
	46	}
	47
5e541973	48	static inline void pud_free(struct mm_struct mm, pud_t pud)
f88df14b DG	49	{
	50	kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
	51	}
	52
	53	static inline void pud_populate(struct mm_struct mm, pud_t pud, pmd_t *pmd)
	54	{
	55	pud_set(pud, (unsigned long)pmd);
	56	}
	57
	58	#define pmd_populate(mm, pmd, pte_page) \
	59	pmd_populate_kernel(mm, pmd, page_address(pte_page))
	60	#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
2f569afd	61	#define pmd_pgtable(pmd) pmd_page(pmd)
f88df14b DG	62
	63
	64	#else /* CONFIG_PPC_64K_PAGES */
	65
	66	#define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd)
	67
	68	static inline void pmd_populate_kernel(struct mm_struct mm, pmd_t pmd,
	69	pte_t *pte)
	70	{
	71	pmd_set(pmd, (unsigned long)pte);
	72	}
	73
	74	#define pmd_populate(mm, pmd, pte_page) \
	75	pmd_populate_kernel(mm, pmd, page_address(pte_page))
2f569afd	76	#define pmd_pgtable(pmd) pmd_page(pmd)
f88df14b DG	77
	78	#endif /* CONFIG_PPC_64K_PAGES */
	79
	80	static inline pmd_t pmd_alloc_one(struct mm_struct mm, unsigned long addr)
	81	{
	82	return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
	83	GFP_KERNEL\|__GFP_REPEAT);
	84	}
	85
5e541973	86	static inline void pmd_free(struct mm_struct mm, pmd_t pmd)
f88df14b DG	87	{
	88	kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
	89	}
	90
	91	static inline pte_t pte_alloc_one_kernel(struct mm_struct mm,
	92	unsigned long address)
	93	{
517e2263	94	return (pte_t *)__get_free_page(GFP_KERNEL \| __GFP_REPEAT \| __GFP_ZERO);
f88df14b DG	95	}
f88df14b DG	96
2f569afd MS	97	static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
2f569afd MS	98	unsigned long address)
f88df14b	99	{
2f569afd MS	100	struct page *page;
	101	pte_t *pte;
	102
	103	pte = pte_alloc_one_kernel(mm, address);
	104	if (!pte)
	105	return NULL;
	106	page = virt_to_page(pte);
	107	pgtable_page_ctor(page);
	108	return page;
f88df14b DG	109	}
f88df14b DG	110
5e541973	111	static inline void pte_free_kernel(struct mm_struct mm, pte_t pte)
f88df14b	112	{
517e2263	113	free_page((unsigned long)pte);
f88df14b DG	114	}
f88df14b DG	115
2f569afd	116	static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
f88df14b	117	{
2f569afd	118	pgtable_page_dtor(ptepage);
517e2263	119	__free_page(ptepage);
f88df14b DG	120	}
	121
	122	#define PGF_CACHENUM_MASK 0x3
	123
	124	typedef struct pgtable_free {
	125	unsigned long val;
	126	} pgtable_free_t;
	127
	128	static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
	129	unsigned long mask)
	130	{
	131	BUG_ON(cachenum > PGF_CACHENUM_MASK);
	132
	133	return (pgtable_free_t){.val = ((unsigned long) p & ~mask) \| cachenum};
	134	}
	135
	136	static inline void pgtable_free(pgtable_free_t pgf)
	137	{
	138	void p = (void )(pgf.val & ~PGF_CACHENUM_MASK);
	139	int cachenum = pgf.val & PGF_CACHENUM_MASK;
	140
517e2263 HD	141	if (cachenum == PTE_NONCACHE_NUM)
	142	free_page((unsigned long)p);
	143	else
	144	kmem_cache_free(pgtable_cache[cachenum], p);
f88df14b DG	145	}
	146
	147	extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
	148
2f569afd MS	149	#define __pte_free_tlb(tlb,ptepage) \
	150	do { \
	151	pgtable_page_dtor(ptepage); \
f88df14b	152	pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
2f569afd MS	153	PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \
2f569afd MS	154	} while (0)
f88df14b DG	155	#define __pmd_free_tlb(tlb, pmd) \
	156	pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
	157	PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
	158	#ifndef CONFIG_PPC_64K_PAGES
	159	#define __pud_free_tlb(tlb, pud) \
	160	pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
	161	PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
	162	#endif /* CONFIG_PPC_64K_PAGES */
	163
	164	#define check_pgt_cache() do { } while (0)
	165
	166	#endif /* _ASM_POWERPC_PGALLOC_64_H */