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 
16 extern struct kmem_cache *pgtable_cache;
17 
18 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
19 {
20 	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
21 }
22 
23 static 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 
30 static 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 
36 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
37 {
38 	kmem_cache_free(pgtable_cache, pmd);
39 }
40 
41 extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
42 				   unsigned long address);
43 extern pgtable_t pte_alloc_one(struct mm_struct *mm,
44 			       unsigned long address);
45 extern void pte_free_kernel(struct mm_struct *mm, pte_t *pte);
46 extern void pte_free(struct mm_struct *mm, pgtable_t ptepage);
47 
48 #define pmd_populate_kernel(MM, PMD, PTE)	pmd_set(MM, PMD, PTE)
49 #define pmd_populate(MM, PMD, PTE)		pmd_set(MM, PMD, PTE)
50 #define pmd_pgtable(PMD)			((pte_t *)__pmd_page(PMD))
51 
52 #define check_pgt_cache()	do { } while (0)
53 
54 extern void pgtable_free(void *table, bool is_page);
55 
56 #ifdef CONFIG_SMP
57 
58 struct mmu_gather;
59 extern void tlb_remove_table(struct mmu_gather *, void *);
60 
61 static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
62 {
63 	unsigned long pgf = (unsigned long)table;
64 	if (is_page)
65 		pgf |= 0x1UL;
66 	tlb_remove_table(tlb, (void *)pgf);
67 }
68 
69 static inline void __tlb_remove_table(void *_table)
70 {
71 	void *table = (void *)((unsigned long)_table & ~0x1UL);
72 	bool is_page = false;
73 
74 	if ((unsigned long)_table & 0x1UL)
75 		is_page = true;
76 	pgtable_free(table, is_page);
77 }
78 #else /* CONFIG_SMP */
79 static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
80 {
81 	pgtable_free(table, is_page);
82 }
83 #endif /* !CONFIG_SMP */
84 
85 static inline void __pte_free_tlb(struct mmu_gather *tlb, pte_t *pte,
86 				  unsigned long address)
87 {
88 	pgtable_free_tlb(tlb, pte, true);
89 }
90 
91 #define __pmd_free_tlb(tlb, pmd, addr)		      \
92 	pgtable_free_tlb(tlb, pmd, false)
93 
94 #endif /* _SPARC64_PGALLOC_H */
95