This source file includes following definitions.
- __phys_addr
- __phys_addr_symbol
- __virt_addr_valid
- __phys_addr
- __virt_addr_valid
1
2 #include <linux/memblock.h>
3 #include <linux/mmdebug.h>
4 #include <linux/export.h>
5 #include <linux/mm.h>
6
7 #include <asm/page.h>
8
9 #include "physaddr.h"
10
11 #ifdef CONFIG_X86_64
12
13 #ifdef CONFIG_DEBUG_VIRTUAL
14 unsigned long __phys_addr(unsigned long x)
15 {
16 unsigned long y = x - __START_KERNEL_map;
17
18
19 if (unlikely(x > y)) {
20 x = y + phys_base;
21
22 VIRTUAL_BUG_ON(y >= KERNEL_IMAGE_SIZE);
23 } else {
24 x = y + (__START_KERNEL_map - PAGE_OFFSET);
25
26
27 VIRTUAL_BUG_ON((x > y) || !phys_addr_valid(x));
28 }
29
30 return x;
31 }
32 EXPORT_SYMBOL(__phys_addr);
33
34 unsigned long __phys_addr_symbol(unsigned long x)
35 {
36 unsigned long y = x - __START_KERNEL_map;
37
38
39 VIRTUAL_BUG_ON(y >= KERNEL_IMAGE_SIZE);
40
41 return y + phys_base;
42 }
43 EXPORT_SYMBOL(__phys_addr_symbol);
44 #endif
45
46 bool __virt_addr_valid(unsigned long x)
47 {
48 unsigned long y = x - __START_KERNEL_map;
49
50
51 if (unlikely(x > y)) {
52 x = y + phys_base;
53
54 if (y >= KERNEL_IMAGE_SIZE)
55 return false;
56 } else {
57 x = y + (__START_KERNEL_map - PAGE_OFFSET);
58
59
60 if ((x > y) || !phys_addr_valid(x))
61 return false;
62 }
63
64 return pfn_valid(x >> PAGE_SHIFT);
65 }
66 EXPORT_SYMBOL(__virt_addr_valid);
67
68 #else
69
70 #ifdef CONFIG_DEBUG_VIRTUAL
71 unsigned long __phys_addr(unsigned long x)
72 {
73 unsigned long phys_addr = x - PAGE_OFFSET;
74
75 VIRTUAL_BUG_ON(x < PAGE_OFFSET);
76 VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x));
77
78 if (max_low_pfn) {
79 VIRTUAL_BUG_ON((phys_addr >> PAGE_SHIFT) > max_low_pfn);
80 BUG_ON(slow_virt_to_phys((void *)x) != phys_addr);
81 }
82 return phys_addr;
83 }
84 EXPORT_SYMBOL(__phys_addr);
85 #endif
86
87 bool __virt_addr_valid(unsigned long x)
88 {
89 if (x < PAGE_OFFSET)
90 return false;
91 if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
92 return false;
93 if (x >= FIXADDR_START)
94 return false;
95 return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
96 }
97 EXPORT_SYMBOL(__virt_addr_valid);
98
99 #endif