52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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// 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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/*
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* Boundary checking aginst the kernel linear mapping space.
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*/
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WARN(!is_linear_mapping(x) && !is_kernel_mapping(x),
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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 = kernel_start + kernel_map.size;
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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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phys_addr_t linear_mapping_va_to_pa(unsigned long x)
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{
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BUG_ON(!kernel_map.va_pa_offset);
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return ((unsigned long)(x) - kernel_map.va_pa_offset);
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}
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EXPORT_SYMBOL(linear_mapping_va_to_pa);
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void *linear_mapping_pa_to_va(unsigned long x)
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{
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BUG_ON(!kernel_map.va_pa_offset);
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return ((void *)((unsigned long)(x) + kernel_map.va_pa_offset));
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}
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EXPORT_SYMBOL(linear_mapping_pa_to_va);
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