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 9 phys_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 } 20 EXPORT_SYMBOL(__virt_to_phys); 21 22 phys_addr_t __phys_addr_symbol(unsigned long x) 23 { 24 unsigned long kernel_start = kernel_map.virt_addr; 25 unsigned long kernel_end = (unsigned long)_end; 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 } 35 EXPORT_SYMBOL(__phys_addr_symbol); 36