1#ifndef _SPARC64_PGALLOC_H
  2#define _SPARC64_PGALLOC_H
  3
  4#include <linux/kernel.h>
  5#include <linux/sched.h>
  6#include <linux/mm.h>
  7#include <linux/slab.h>
  8
  9#include <asm/spitfire.h>
 10#include <asm/cpudata.h>
 11#include <asm/cacheflush.h>
 12#include <asm/page.h>
 13
 14/* Page table allocation/freeing. */
 15
 16extern struct kmem_cache *pgtable_cache;
 17
 18static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 19{
 20	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
 21}
 22
 23static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 24{
 25	kmem_cache_free(pgtable_cache, pgd);
 26}
 27
 28#define pud_populate(MM, PUD, PMD)	pud_set(PUD, PMD)
 29
 30static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
 31{
 32	return kmem_cache_alloc(pgtable_cache,
 33				GFP_KERNEL|__GFP_REPEAT);
 34}
 35
 36static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
 37{
 38	kmem_cache_free(pgtable_cache, pmd);
 39}
 40
 41static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 42					  unsigned long address)
 43{
 44	return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
 45}
 46
 47static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
 48					unsigned long address)
 49{
 50	struct page *page;
 51	pte_t *pte;
 52
 53	pte = pte_alloc_one_kernel(mm, address);
 54	if (!pte)
 55		return NULL;
 56	page = virt_to_page(pte);
 57	pgtable_page_ctor(page);
 58	return page;
 59}
 60
 61static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
 62{
 63	free_page((unsigned long)pte);
 64}
 65
 66static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
 67{
 68	pgtable_page_dtor(ptepage);
 69	__free_page(ptepage);
 70}
 71
 72#define pmd_populate_kernel(MM, PMD, PTE)	pmd_set(PMD, PTE)
 73#define pmd_populate(MM,PMD,PTE_PAGE)		\
 74	pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE))
 75#define pmd_pgtable(pmd) pmd_page(pmd)
 76
 77#define check_pgt_cache()	do { } while (0)
 78
 79static inline void pgtable_free(void *table, bool is_page)
 80{
 81	if (is_page)
 82		free_page((unsigned long)table);
 83	else
 84		kmem_cache_free(pgtable_cache, table);
 85}
 86
 87#ifdef CONFIG_SMP
 88
 89struct mmu_gather;
 90extern void tlb_remove_table(struct mmu_gather *, void *);
 91
 92static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
 93{
 94	unsigned long pgf = (unsigned long)table;
 95	if (is_page)
 96		pgf |= 0x1UL;
 97	tlb_remove_table(tlb, (void *)pgf);
 98}
 99
100static inline void __tlb_remove_table(void *_table)
101{
102	void *table = (void *)((unsigned long)_table & ~0x1UL);
103	bool is_page = false;
104
105	if ((unsigned long)_table & 0x1UL)
106		is_page = true;
107	pgtable_free(table, is_page);
108}
109#else /* CONFIG_SMP */
110static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
111{
112	pgtable_free(table, is_page);
113}
114#endif /* !CONFIG_SMP */
115
116static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage,
117				  unsigned long address)
118{
119	pgtable_page_dtor(ptepage);
120	pgtable_free_tlb(tlb, page_address(ptepage), true);
121}
122
123#define __pmd_free_tlb(tlb, pmd, addr)		      \
124	pgtable_free_tlb(tlb, pmd, false)
125
126#endif /* _SPARC64_PGALLOC_H */