1#ifndef __ASM_SH_PGTABLE_3LEVEL_H
 2#define __ASM_SH_PGTABLE_3LEVEL_H
 3
 4#include <asm-generic/pgtable-nopud.h>
 5
 6/*
 7 * Some cores need a 3-level page table layout, for example when using
 8 * 64-bit PTEs and 4K pages.
 9 */
10#define PAGETABLE_LEVELS	3
11
12#define PTE_MAGNITUDE		3	/* 64-bit PTEs on SH-X2 TLB */
13
14/* PGD bits */
15#define PGDIR_SHIFT		30
16
17#define PTRS_PER_PGD		4
18#define USER_PTRS_PER_PGD	2
19
20/* PMD bits */
21#define PMD_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE))
22#define PMD_SIZE	(1UL << PMD_SHIFT)
23#define PMD_MASK	(~(PMD_SIZE-1))
24
25#define PTRS_PER_PMD	((1 << PGDIR_SHIFT) / PMD_SIZE)
26
27#define pmd_ERROR(e) \
28	printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e))
29
30typedef struct { unsigned long long pmd; } pmd_t;
31#define pmd_val(x)	((x).pmd)
32#define __pmd(x)	((pmd_t) { (x) } )
33
34static inline unsigned long pud_page_vaddr(pud_t pud)
35{
36	return pud_val(pud);
37}
38
39#define pmd_index(address)	(((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
40static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
41{
42	return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
43}
44
 
 
45#define pud_none(x)	(!pud_val(x))
46#define pud_present(x)	(pud_val(x))
47#define pud_clear(xp)	do { set_pud(xp, __pud(0)); } while (0)
48#define	pud_bad(x)	(pud_val(x) & ~PAGE_MASK)
49
50/*
51 * (puds are folded into pgds so this doesn't get actually called,
52 * but the define is needed for a generic inline function.)
53 */
54#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
55
56#endif /* __ASM_SH_PGTABLE_3LEVEL_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_PGTABLE_3LEVEL_H
 3#define __ASM_SH_PGTABLE_3LEVEL_H
 4
 5#include <asm-generic/pgtable-nopud.h>
 6
 7/*
 8 * Some cores need a 3-level page table layout, for example when using
 9 * 64-bit PTEs and 4K pages.
10 */
11#define PAGETABLE_LEVELS	3
12
13#define PTE_MAGNITUDE		3	/* 64-bit PTEs on SH-X2 TLB */
14
15/* PGD bits */
16#define PGDIR_SHIFT		30
17
18#define PTRS_PER_PGD		4
19#define USER_PTRS_PER_PGD	2
20
21/* PMD bits */
22#define PMD_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE))
23#define PMD_SIZE	(1UL << PMD_SHIFT)
24#define PMD_MASK	(~(PMD_SIZE-1))
25
26#define PTRS_PER_PMD	((1 << PGDIR_SHIFT) / PMD_SIZE)
27
28#define pmd_ERROR(e) \
29	printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e))
30
31typedef struct { unsigned long long pmd; } pmd_t;
32#define pmd_val(x)	((x).pmd)
33#define __pmd(x)	((pmd_t) { (x) } )
34
35static inline pmd_t *pud_pgtable(pud_t pud)
36{
37	return (pmd_t *)(unsigned long)pud_val(pud);
 
 
 
 
 
 
38}
39
40/* only used by the stubbed out hugetlb gup code, should never be called */
41#define pud_page(pud)		NULL
42#define pud_none(x)	(!pud_val(x))
43#define pud_present(x)	(pud_val(x))
44#define pud_clear(xp)	do { set_pud(xp, __pud(0)); } while (0)
45#define	pud_bad(x)	(pud_val(x) & ~PAGE_MASK)
46
47/*
48 * (puds are folded into pgds so this doesn't get actually called,
49 * but the define is needed for a generic inline function.)
50 */
51#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
52
53#endif /* __ASM_SH_PGTABLE_3LEVEL_H */