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50 lines
1.3 KiB
50 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/bug.h> |
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#include <linux/export.h> |
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#include <linux/types.h> |
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#include <linux/mmdebug.h> |
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#include <linux/mm.h> |
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#include <asm/addrspace.h> |
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#include <asm/sections.h> |
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#include <asm/io.h> |
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#include <asm/page.h> |
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#include <asm/dma.h> |
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static inline bool __debug_virt_addr_valid(unsigned long x) |
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{ |
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/* |
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* MAX_DMA_ADDRESS is a virtual address that may not correspond to an |
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* actual physical address. Enough code relies on |
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* virt_to_phys(MAX_DMA_ADDRESS) that we just need to work around it |
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* and always return true. |
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*/ |
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if (x == MAX_DMA_ADDRESS) |
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return true; |
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return x >= PAGE_OFFSET && (KSEGX(x) < KSEG2 || |
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IS_ENABLED(CONFIG_EVA) || |
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!IS_ENABLED(CONFIG_HIGHMEM)); |
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} |
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phys_addr_t __virt_to_phys(volatile const void *x) |
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{ |
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WARN(!__debug_virt_addr_valid((unsigned long)x), |
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"virt_to_phys used for non-linear address: %pK (%pS)\n", |
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x, x); |
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return __virt_to_phys_nodebug(x); |
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} |
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EXPORT_SYMBOL(__virt_to_phys); |
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phys_addr_t __phys_addr_symbol(unsigned long x) |
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{ |
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/* This is bounds checking against the kernel image only. |
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* __pa_symbol should only be used on kernel symbol addresses. |
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*/ |
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VIRTUAL_BUG_ON(x < (unsigned long)_text || |
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x > (unsigned long)_end); |
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return __pa_symbol_nodebug(x); |
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} |
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EXPORT_SYMBOL(__phys_addr_symbol);
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