This source file includes following definitions.
- pud_present
- pud_none
- pud_bad
- set_pud
- pud_clear
- pud_page_vaddr
- pmd_offset
- pfn_pmd
- _pmd_pfn
1
2
3
4
5
6 #ifndef _ASM_RISCV_PGTABLE_64_H
7 #define _ASM_RISCV_PGTABLE_64_H
8
9 #include <linux/const.h>
10
11 #define PGDIR_SHIFT 30
12
13 #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
14 #define PGDIR_MASK (~(PGDIR_SIZE - 1))
15
16 #define PMD_SHIFT 21
17
18 #define PMD_SIZE (_AC(1, UL) << PMD_SHIFT)
19 #define PMD_MASK (~(PMD_SIZE - 1))
20
21
22 typedef struct {
23 unsigned long pmd;
24 } pmd_t;
25
26 #define pmd_val(x) ((x).pmd)
27 #define __pmd(x) ((pmd_t) { (x) })
28
29 #define PTRS_PER_PMD (PAGE_SIZE / sizeof(pmd_t))
30
31 static inline int pud_present(pud_t pud)
32 {
33 return (pud_val(pud) & _PAGE_PRESENT);
34 }
35
36 static inline int pud_none(pud_t pud)
37 {
38 return (pud_val(pud) == 0);
39 }
40
41 static inline int pud_bad(pud_t pud)
42 {
43 return !pud_present(pud);
44 }
45
46 static inline void set_pud(pud_t *pudp, pud_t pud)
47 {
48 *pudp = pud;
49 }
50
51 static inline void pud_clear(pud_t *pudp)
52 {
53 set_pud(pudp, __pud(0));
54 }
55
56 static inline unsigned long pud_page_vaddr(pud_t pud)
57 {
58 return (unsigned long)pfn_to_virt(pud_val(pud) >> _PAGE_PFN_SHIFT);
59 }
60
61 #define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
62
63 static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
64 {
65 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(addr);
66 }
67
68 static inline pmd_t pfn_pmd(unsigned long pfn, pgprot_t prot)
69 {
70 return __pmd((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
71 }
72
73 static inline unsigned long _pmd_pfn(pmd_t pmd)
74 {
75 return pmd_val(pmd) >> _PAGE_PFN_SHIFT;
76 }
77
78 #define pmd_ERROR(e) \
79 pr_err("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
80
81 #endif