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 union {
32	struct {
33		unsigned long pmd_low;
34		unsigned long pmd_high;
35	};
36	unsigned long long pmd;
37} pmd_t;
38#define pmd_val(x)	((x).pmd)
39#define __pmd(x)	((pmd_t) { .pmd = (x) } )
40
41static inline pmd_t *pud_pgtable(pud_t pud)
42{
43	return (pmd_t *)(unsigned long)pud_val(pud);
44}
45
46/* only used by the stubbed out hugetlb gup code, should never be called */
47#define pud_page(pud)		NULL
 
 
 
 
 
 
 
48#define pud_none(x)	(!pud_val(x))
49#define pud_present(x)	(pud_val(x))
50#define pud_clear(xp)	do { set_pud(xp, __pud(0)); } while (0)
51#define	pud_bad(x)	(pud_val(x) & ~PAGE_MASK)
52
53/*
54 * (puds are folded into pgds so this doesn't get actually called,
55 * but the define is needed for a generic inline function.)
56 */
57#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
58
59#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#define __ARCH_USE_5LEVEL_HACK
 6#include <asm-generic/pgtable-nopud.h>
 7
 8/*
 9 * Some cores need a 3-level page table layout, for example when using
10 * 64-bit PTEs and 4K pages.
11 */
12#define PAGETABLE_LEVELS	3
13
14#define PTE_MAGNITUDE		3	/* 64-bit PTEs on SH-X2 TLB */
15
16/* PGD bits */
17#define PGDIR_SHIFT		30
18
19#define PTRS_PER_PGD		4
20#define USER_PTRS_PER_PGD	2
21
22/* PMD bits */
23#define PMD_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE))
24#define PMD_SIZE	(1UL << PMD_SHIFT)
25#define PMD_MASK	(~(PMD_SIZE-1))
26
27#define PTRS_PER_PMD	((1 << PGDIR_SHIFT) / PMD_SIZE)
28
29#define pmd_ERROR(e) \
30	printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e))
31
32typedef struct { unsigned long long pmd; } pmd_t;
 
 
 
 
 
 
33#define pmd_val(x)	((x).pmd)
34#define __pmd(x)	((pmd_t) { (x) } )
35
36static inline unsigned long pud_page_vaddr(pud_t pud)
37{
38	return pud_val(pud);
39}
40
41/* only used by the stubbed out hugetlb gup code, should never be called */
42#define pud_page(pud)		NULL
43
44#define pmd_index(address)	(((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
45static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
46{
47	return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
48}
49
50#define pud_none(x)	(!pud_val(x))
51#define pud_present(x)	(pud_val(x))
52#define pud_clear(xp)	do { set_pud(xp, __pud(0)); } while (0)
53#define	pud_bad(x)	(pud_val(x) & ~PAGE_MASK)
54
55/*
56 * (puds are folded into pgds so this doesn't get actually called,
57 * but the define is needed for a generic inline function.)
58 */
59#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
60
61#endif /* __ASM_SH_PGTABLE_3LEVEL_H */