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6435f773 ZL |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | ||
3 | #include <linux/types.h> | |
4 | #include <linux/mmdebug.h> | |
5 | #include <linux/mm.h> | |
6 | #include <asm/page.h> | |
7 | #include <asm/sections.h> | |
8 | ||
9 | phys_addr_t __virt_to_phys(unsigned long x) | |
10 | { | |
6435f773 ZL |
11 | /* |
12 | * Boundary checking aginst the kernel linear mapping space. | |
13 | */ | |
5f763b3b | 14 | WARN(!is_linear_mapping(x) && !is_kernel_mapping(x), |
6435f773 ZL |
15 | "virt_to_phys used for non-linear address: %pK (%pS)\n", |
16 | (void *)x, (void *)x); | |
17 | ||
18 | return __va_to_pa_nodebug(x); | |
19 | } | |
20 | EXPORT_SYMBOL(__virt_to_phys); | |
21 | ||
22 | phys_addr_t __phys_addr_symbol(unsigned long x) | |
23 | { | |
658e2c51 | 24 | unsigned long kernel_start = kernel_map.virt_addr; |
0c496881 | 25 | unsigned long kernel_end = kernel_start + kernel_map.size; |
6435f773 ZL |
26 | |
27 | /* | |
28 | * Boundary checking aginst the kernel image mapping. | |
29 | * __pa_symbol should only be used on kernel symbol addresses. | |
30 | */ | |
31 | VIRTUAL_BUG_ON(x < kernel_start || x > kernel_end); | |
32 | ||
33 | return __va_to_pa_nodebug(x); | |
34 | } | |
35 | EXPORT_SYMBOL(__phys_addr_symbol); | |
3335068f AG |
36 | |
37 | phys_addr_t linear_mapping_va_to_pa(unsigned long x) | |
38 | { | |
39 | BUG_ON(!kernel_map.va_pa_offset); | |
40 | ||
41 | return ((unsigned long)(x) - kernel_map.va_pa_offset); | |
42 | } | |
43 | EXPORT_SYMBOL(linear_mapping_va_to_pa); | |
44 | ||
45 | void *linear_mapping_pa_to_va(unsigned long x) | |
46 | { | |
47 | BUG_ON(!kernel_map.va_pa_offset); | |
48 | ||
49 | return ((void *)((unsigned long)(x) + kernel_map.va_pa_offset)); | |
50 | } | |
51 | EXPORT_SYMBOL(linear_mapping_pa_to_va); |