38 lines
899 B
C
38 lines
899 B
C
// 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 = kernel_map.virt_addr;
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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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