| 1 | |
| 2 | #include <linux/bug.h>
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| 3 | #include <linux/export.h>
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| 4 | #include <linux/types.h>
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| 5 | #include <linux/mmdebug.h>
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| 6 | #include <linux/mm.h>
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| 7 |
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| 8 | #include <asm/addrspace.h>
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| 9 | #include <asm/sections.h>
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| 10 | #include <asm/io.h>
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| 11 | #include <asm/page.h>
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| 12 | #include <asm/dma.h>
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| 13 |
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| 14 | static inline bool __debug_virt_addr_valid(unsigned long x)
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| 15 | {
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| 16 | |
| 17 | * MAX_DMA_ADDRESS is a virtual address that may not correspond to an
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| 18 | * actual physical address. Enough code relies on
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| 19 | * virt_to_phys(MAX_DMA_ADDRESS) that we just need to work around it
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| 20 | * and always return true.
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| 21 |
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| 22 | if (x == MAX_DMA_ADDRESS)
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| 23 | return true;
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| 24 |
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| 25 | return x >= PAGE_OFFSET && (KSEGX(x) < KSEG2 ||
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| 26 | IS_ENABLED(CONFIG_EVA) ||
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| 27 | !IS_ENABLED(CONFIG_HIGHMEM));
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| 28 | }
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| 29 |
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| 30 | phys_addr_t __virt_to_phys(volatile const void *x)
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| 31 | {
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| 32 | WARN(!__debug_virt_addr_valid((unsigned long)x),
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| 33 | "virt_to_phys used for non-linear address: %p (%pS)\n",
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| 34 | x, x);
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| 35 |
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| 36 | return __virt_to_phys_nodebug(x);
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| 37 | }
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| 38 | EXPORT_SYMBOL(__virt_to_phys);
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| 39 |
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| 40 | phys_addr_t __phys_addr_symbol(unsigned long x)
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| 41 | {
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| 42 | |
| 43 | * __pa_symbol should only be used on kernel symbol addresses.
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| 44 |
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| 45 | VIRTUAL_BUG_ON(x < (unsigned long)_text ||
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| 46 | x > (unsigned long)_end);
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| 47 |
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| 48 | return __pa_symbol_nodebug(x);
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| 49 | }
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| 50 | EXPORT_SYMBOL(__phys_addr_symbol);
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