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37 lines
905 B
37 lines
905 B
// SPDX-License-Identifier: GPL-2.0 |
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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/page.h> |
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#include <asm/sections.h> |
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phys_addr_t __virt_to_phys(unsigned long x) |
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{ |
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phys_addr_t y = x - PAGE_OFFSET; |
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/* |
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* Boundary checking aginst the kernel linear mapping space. |
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*/ |
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WARN(y >= KERN_VIRT_SIZE, |
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"virt_to_phys used for non-linear address: %pK (%pS)\n", |
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(void *)x, (void *)x); |
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return __va_to_pa_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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unsigned long kernel_start = (unsigned long)PAGE_OFFSET; |
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unsigned long kernel_end = (unsigned long)_end; |
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/* |
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* Boundary checking aginst the kernel image mapping. |
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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 < kernel_start || x > kernel_end); |
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return __va_to_pa_nodebug(x); |
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} |
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EXPORT_SYMBOL(__phys_addr_symbol);
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