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 */
127