1// SPDX-License-Identifier: GPL-2.0 2 3#include <linux/types.h> 4#include <linux/mmdebug.h> 5#include <linux/mm.h> 6#include <asm/page.h> 7#include <asm/sections.h> 8 9phys_addr_t __virt_to_phys(unsigned long x) 10{ 11 /* 12 * Boundary checking aginst the kernel linear mapping space. 13 */ 14 WARN(!is_linear_mapping(x) && !is_kernel_mapping(x), 15 "virt_to_phys used for non-linear address: %pK (%pS)\n", 16 (void *)x, (void *)x); 17 18 return __va_to_pa_nodebug(x); 19} 20EXPORT_SYMBOL(__virt_to_phys); 21 22phys_addr_t __phys_addr_symbol(unsigned long x) 23{ 24 unsigned long kernel_start = kernel_map.virt_addr; 25 unsigned long kernel_end = kernel_start + kernel_map.size; 26 27 /* 28 * Boundary checking aginst the kernel image mapping. 29 * __pa_symbol should only be used on kernel symbol addresses. 30 */ 31 VIRTUAL_BUG_ON(x < kernel_start || x > kernel_end); 32 33 return __va_to_pa_nodebug(x); 34} 35EXPORT_SYMBOL(__phys_addr_symbol); 36 37phys_addr_t linear_mapping_va_to_pa(unsigned long x) 38{ 39 BUG_ON(!kernel_map.va_pa_offset); 40 41 return ((unsigned long)(x) - kernel_map.va_pa_offset); 42} 43EXPORT_SYMBOL(linear_mapping_va_to_pa); 44 45void *linear_mapping_pa_to_va(unsigned long x) 46{ 47 BUG_ON(!kernel_map.va_pa_offset); 48 49 return ((void *)((unsigned long)(x) + kernel_map.va_pa_offset)); 50} 51EXPORT_SYMBOL(linear_mapping_pa_to_va); 52