1 | // SPDX-License-Identifier: GPL-2.0 |
---|---|
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/addrspace.h> |
9 | #include <asm/sections.h> |
10 | #include <asm/io.h> |
11 | #include <asm/page.h> |
12 | #include <asm/dma.h> |
13 | |
14 | static inline bool __debug_virt_addr_valid(unsigned long x) |
15 | { |
16 | /* |
17 | * MAX_DMA_ADDRESS is a virtual address that may not correspond to an |
18 | * actual physical address. Enough code relies on |
19 | * virt_to_phys(MAX_DMA_ADDRESS) that we just need to work around it |
20 | * and always return true. |
21 | */ |
22 | if (x == MAX_DMA_ADDRESS) |
23 | return true; |
24 | |
25 | return x >= PAGE_OFFSET && (KSEGX(x) < KSEG2 || |
26 | IS_ENABLED(CONFIG_EVA) || |
27 | !IS_ENABLED(CONFIG_HIGHMEM)); |
28 | } |
29 | |
30 | phys_addr_t __virt_to_phys(volatile const void *x) |
31 | { |
32 | WARN(!__debug_virt_addr_valid((unsigned long)x), |
33 | "virt_to_phys used for non-linear address: %pK (%pS)\n", |
34 | x, x); |
35 | |
36 | return __virt_to_phys_nodebug(x); |
37 | } |
38 | EXPORT_SYMBOL(__virt_to_phys); |
39 | |
40 | phys_addr_t __phys_addr_symbol(unsigned long x) |
41 | { |
42 | /* This is bounds checking against the kernel image only. |
43 | * __pa_symbol should only be used on kernel symbol addresses. |
44 | */ |
45 | VIRTUAL_BUG_ON(x < (unsigned long)_text || |
46 | x > (unsigned long)_end); |
47 | |
48 | return __pa_symbol_nodebug(x); |
49 | } |
50 | EXPORT_SYMBOL(__phys_addr_symbol); |
51 |