summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/book3s/64/hash-4k.h
blob: 6a10b0d893542d69c91760fdd1422cf3570b0275 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
#ifndef _ASM_POWERPC_BOOK3S_64_HASH_4K_H
#define _ASM_POWERPC_BOOK3S_64_HASH_4K_H
/*
 * Entries per page directory level.  The PTE level must use a 64b record
 * for each page table entry.  The PMD and PGD level use a 32b record for
 * each entry by assuming that each entry is page aligned.
 */
#define H_PTE_INDEX_SIZE  9
#define H_PMD_INDEX_SIZE  7
#define H_PUD_INDEX_SIZE  9
#define H_PGD_INDEX_SIZE  9

#ifndef __ASSEMBLY__
#define H_PTE_TABLE_SIZE	(sizeof(pte_t) << H_PTE_INDEX_SIZE)
#define H_PMD_TABLE_SIZE	(sizeof(pmd_t) << H_PMD_INDEX_SIZE)
#define H_PUD_TABLE_SIZE	(sizeof(pud_t) << H_PUD_INDEX_SIZE)
#define H_PGD_TABLE_SIZE	(sizeof(pgd_t) << H_PGD_INDEX_SIZE)

/* With 4k base page size, hugepage PTEs go at the PMD level */
#define MIN_HUGEPTE_SHIFT	PMD_SHIFT

/* PTE flags to conserve for HPTE identification */
#define _PAGE_HPTEFLAGS (H_PAGE_BUSY | H_PAGE_HASHPTE | \
			 H_PAGE_F_SECOND | H_PAGE_F_GIX)
/*
 * Not supported by 4k linux page size
 */
#define H_PAGE_4K_PFN	0x0
#define H_PAGE_THP_HUGE 0x0
#define H_PAGE_COMBO	0x0
#define H_PTE_FRAG_NR	0
#define H_PTE_FRAG_SIZE_SHIFT  0
/*
 * On all 4K setups, remap_4k_pfn() equates to remap_pfn_range()
 */
#define remap_4k_pfn(vma, addr, pfn, prot)	\
	remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, (prot))

#ifdef CONFIG_HUGETLB_PAGE
static inline int hash__hugepd_ok(hugepd_t hpd)
{
	/*
	 * if it is not a pte and have hugepd shift mask
	 * set, then it is a hugepd directory pointer
	 */
	if (!(hpd.pd & _PAGE_PTE) &&
	    ((hpd.pd & HUGEPD_SHIFT_MASK) != 0))
		return true;
	return false;
}
#endif

#endif /* !__ASSEMBLY__ */

#endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */