blob: d2e2735327b4b2ed8f65dd06895aabc71e67e4d3 (
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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
#include <linux/mmdebug.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <asm/page.h>
#include "physaddr.h"
#ifdef CONFIG_X86_64
unsigned long __phys_addr(unsigned long x)
{
if (x >= __START_KERNEL_map) {
x -= __START_KERNEL_map;
VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE);
x += phys_base;
} else {
VIRTUAL_BUG_ON(x < PAGE_OFFSET);
x -= PAGE_OFFSET;
VIRTUAL_BUG_ON(!phys_addr_valid(x));
}
return x;
}
EXPORT_SYMBOL(__phys_addr);
bool __virt_addr_valid(unsigned long x)
{
if (x >= __START_KERNEL_map) {
x -= __START_KERNEL_map;
if (x >= KERNEL_IMAGE_SIZE)
return false;
x += phys_base;
} else {
if (x < PAGE_OFFSET)
return false;
x -= PAGE_OFFSET;
if (!phys_addr_valid(x))
return false;
}
return pfn_valid(x >> PAGE_SHIFT);
}
EXPORT_SYMBOL(__virt_addr_valid);
#else
#ifdef CONFIG_DEBUG_VIRTUAL
unsigned long __phys_addr(unsigned long x)
{
/* VMALLOC_* aren't constants */
VIRTUAL_BUG_ON(x < PAGE_OFFSET);
VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x));
return x - PAGE_OFFSET;
}
EXPORT_SYMBOL(__phys_addr);
#endif
bool __virt_addr_valid(unsigned long x)
{
if (x < PAGE_OFFSET)
return false;
if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
return false;
if (x >= FIXADDR_START)
return false;
return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
}
EXPORT_SYMBOL(__virt_addr_valid);
#endif /* CONFIG_X86_64 */
|
