1#include <linux/bootmem.h>
 2#include <linux/mmdebug.h>
 3#include <linux/module.h>
 4#include <linux/mm.h>
 5
 6#include <asm/page.h>
 7
 8#include "physaddr.h"
 9
10#ifdef CONFIG_X86_64
11
12#ifdef CONFIG_DEBUG_VIRTUAL
13unsigned long __phys_addr(unsigned long x)
14{
15	unsigned long y = x - __START_KERNEL_map;
16
17	/* use the carry flag to determine if x was < __START_KERNEL_map */
18	if (unlikely(x > y)) {
19		x = y + phys_base;
20
21		VIRTUAL_BUG_ON(y >= KERNEL_IMAGE_SIZE);
22	} else {
23		x = y + (__START_KERNEL_map - PAGE_OFFSET);
24
25		/* carry flag will be set if starting x was >= PAGE_OFFSET */
26		VIRTUAL_BUG_ON((x > y) || !phys_addr_valid(x));
27	}
28
29	return x;
30}
31EXPORT_SYMBOL(__phys_addr);
32
33unsigned long __phys_addr_symbol(unsigned long x)
34{
35	unsigned long y = x - __START_KERNEL_map;
36
37	/* only check upper bounds since lower bounds will trigger carry */
38	VIRTUAL_BUG_ON(y >= KERNEL_IMAGE_SIZE);
39
40	return y + phys_base;
41}
42EXPORT_SYMBOL(__phys_addr_symbol);
43#endif
44
45bool __virt_addr_valid(unsigned long x)
46{
47	unsigned long y = x - __START_KERNEL_map;
48
49	/* use the carry flag to determine if x was < __START_KERNEL_map */
50	if (unlikely(x > y)) {
51		x = y + phys_base;
52
53		if (y >= KERNEL_IMAGE_SIZE)
54			return false;
 
55	} else {
56		x = y + (__START_KERNEL_map - PAGE_OFFSET);
57
58		/* carry flag will be set if starting x was >= PAGE_OFFSET */
59		if ((x > y) || !phys_addr_valid(x))
60			return false;
61	}
62
63	return pfn_valid(x >> PAGE_SHIFT);
64}
65EXPORT_SYMBOL(__virt_addr_valid);
66
67#else
68
69#ifdef CONFIG_DEBUG_VIRTUAL
70unsigned long __phys_addr(unsigned long x)
71{
72	unsigned long phys_addr = x - PAGE_OFFSET;
73	/* VMALLOC_* aren't constants  */
74	VIRTUAL_BUG_ON(x < PAGE_OFFSET);
75	VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x));
76	/* max_low_pfn is set early, but not _that_ early */
77	if (max_low_pfn) {
78		VIRTUAL_BUG_ON((phys_addr >> PAGE_SHIFT) > max_low_pfn);
79		BUG_ON(slow_virt_to_phys((void *)x) != phys_addr);
80	}
81	return phys_addr;
82}
83EXPORT_SYMBOL(__phys_addr);
84#endif
85
86bool __virt_addr_valid(unsigned long x)
87{
88	if (x < PAGE_OFFSET)
89		return false;
90	if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
91		return false;
92	if (x >= FIXADDR_START)
93		return false;
94	return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
95}
96EXPORT_SYMBOL(__virt_addr_valid);
97
98#endif	/* CONFIG_X86_64 */

 
 1#include <linux/mmdebug.h>
 2#include <linux/module.h>
 3#include <linux/mm.h>
 4
 5#include <asm/page.h>
 6
 7#include "physaddr.h"
 8
 9#ifdef CONFIG_X86_64
10
 
11unsigned long __phys_addr(unsigned long x)
12{
13	if (x >= __START_KERNEL_map) {
14		x -= __START_KERNEL_map;
15		VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE);
16		x += phys_base;
 
 
 
17	} else {
18		VIRTUAL_BUG_ON(x < PAGE_OFFSET);
19		x -= PAGE_OFFSET;
20		VIRTUAL_BUG_ON(!phys_addr_valid(x));
 
21	}
 
22	return x;
23}
24EXPORT_SYMBOL(__phys_addr);
25
 
 
 
 
 
 
 
 
 
 
 
 
26bool __virt_addr_valid(unsigned long x)
27{
28	if (x >= __START_KERNEL_map) {
29		x -= __START_KERNEL_map;
30		if (x >= KERNEL_IMAGE_SIZE)
 
 
 
 
31			return false;
32		x += phys_base;
33	} else {
34		if (x < PAGE_OFFSET)
35			return false;
36		x -= PAGE_OFFSET;
37		if (!phys_addr_valid(x))
38			return false;
39	}
40
41	return pfn_valid(x >> PAGE_SHIFT);
42}
43EXPORT_SYMBOL(__virt_addr_valid);
44
45#else
46
47#ifdef CONFIG_DEBUG_VIRTUAL
48unsigned long __phys_addr(unsigned long x)
49{
 
50	/* VMALLOC_* aren't constants  */
51	VIRTUAL_BUG_ON(x < PAGE_OFFSET);
52	VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x));
53	return x - PAGE_OFFSET;
 
 
 
 
 
54}
55EXPORT_SYMBOL(__phys_addr);
56#endif
57
58bool __virt_addr_valid(unsigned long x)
59{
60	if (x < PAGE_OFFSET)
61		return false;
62	if (__vmalloc_start_set && is_vmalloc_addr((void *) x))
63		return false;
64	if (x >= FIXADDR_START)
65		return false;
66	return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
67}
68EXPORT_SYMBOL(__virt_addr_valid);
69
70#endif	/* CONFIG_X86_64 */