1 // SPDX-License-Identifier: GPL-2.0 1
2 #include <linux/bug.h>
3 #include <linux/export.h>
4 #include <linux/types.h>
5 #include <linux/mmdebug.h>
6 #include <linux/mm.h>
7
8 #include <asm/sections.h>
9 #include <asm/page.h>
10 #include <asm/fixmap.h>
11 #include <asm/dma.h>
12
13 #include "mm.h"
14
15 static inline bool __virt_addr_valid(unsigned
16 {
17 /*
18 * high_memory does not get immediatel
19 * are early callers of __pa() against
20 */
21 if (!high_memory && x >= PAGE_OFFSET)
22 return true;
23
24 if (high_memory && x >= PAGE_OFFSET &&
25 return true;
26
27 /*
28 * MAX_DMA_ADDRESS is a virtual addres
29 * actual physical address. Enough cod
30 * that we just need to work around it
31 */
32 if (x == MAX_DMA_ADDRESS)
33 return true;
34
35 return false;
36 }
37
38 phys_addr_t __virt_to_phys(unsigned long x)
39 {
40 WARN(!__virt_addr_valid(x),
41 "virt_to_phys used for non-linear
42 (void *)x, (void *)x);
43
44 return __virt_to_phys_nodebug(x);
45 }
46 EXPORT_SYMBOL(__virt_to_phys);
47
48 phys_addr_t __phys_addr_symbol(unsigned long x
49 {
50 /* This is bounds checking against the
51 * __pa_symbol should only be used on
52 */
53 VIRTUAL_BUG_ON(x < (unsigned long)KERN
54 x > (unsigned long)KERN
55
56 return __pa_symbol_nodebug(x);
57 }
58 EXPORT_SYMBOL(__phys_addr_symbol);
59
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