Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_POWERPC_PGALLOC_H
2#define _ASM_POWERPC_PGALLOC_H
3#ifdef __KERNEL__
4
5#include <linux/mm.h>
6
7#ifdef CONFIG_PPC_BOOK3E
8extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address);
9#else /* CONFIG_PPC_BOOK3E */
10static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
11 unsigned long address)
12{
13}
14#endif /* !CONFIG_PPC_BOOK3E */
15
16static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
17{
18 free_page((unsigned long)pte);
19}
20
21static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
22{
23 pgtable_page_dtor(ptepage);
24 __free_page(ptepage);
25}
26
27typedef struct pgtable_free {
28 unsigned long val;
29} pgtable_free_t;
30
31/* This needs to be big enough to allow for MMU_PAGE_COUNT + 2 to be stored
32 * and small enough to fit in the low bits of any naturally aligned page
33 * table cache entry. Arbitrarily set to 0x1f, that should give us some
34 * room to grow
35 */
36#define PGF_CACHENUM_MASK 0x1f
37
38static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
39 unsigned long mask)
40{
41 BUG_ON(cachenum > PGF_CACHENUM_MASK);
42
43 return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
44}
45
46#ifdef CONFIG_PPC64
47#include <asm/pgalloc-64.h>
48#else
49#include <asm/pgalloc-32.h>
50#endif
51
52#ifdef CONFIG_SMP
53extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
54extern void pte_free_finish(void);
55#else /* CONFIG_SMP */
56static inline void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf)
57{
58 pgtable_free(pgf);
59}
60static inline void pte_free_finish(void) { }
61#endif /* !CONFIG_SMP */
62
63static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage,
64 unsigned long address)
65{
66 pgtable_free_t pgf = pgtable_free_cache(page_address(ptepage),
67 PTE_NONCACHE_NUM,
68 PTE_TABLE_SIZE-1);
69 tlb_flush_pgtable(tlb, address);
70 pgtable_page_dtor(ptepage);
71 pgtable_free_tlb(tlb, pgf);
72}
73
74#endif /* __KERNEL__ */
75#endif /* _ASM_POWERPC_PGALLOC_H */