// SPDX-License-Identifier: GPL-2.0 #include <linux/types.h> #include <linux/mmdebug.h> #include <linux/mm.h> #include <asm/page.h> #include <asm/sections.h> phys_addr_t __virt_to_phys(unsigned long x) { /* * Boundary checking aginst the kernel linear mapping space. */ WARN(!is_linear_mapping(x) && !is_kernel_mapping(x), "virt_to_phys used for non-linear address: %pK (%pS)\n", (void *)x, (void *)x); return __va_to_pa_nodebug(x); } EXPORT_SYMBOL(__virt_to_phys); phys_addr_t __phys_addr_symbol(unsigned long x) { unsigned long kernel_start = kernel_map.virt_addr; unsigned long kernel_end = kernel_start + kernel_map.size; /* * Boundary checking aginst the kernel image mapping. * __pa_symbol should only be used on kernel symbol addresses. */ VIRTUAL_BUG_ON(x < kernel_start || x > kernel_end); return __va_to_pa_nodebug(x); } EXPORT_SYMBOL(__phys_addr_symbol); phys_addr_t linear_mapping_va_to_pa(unsigned long x) { BUG_ON(!kernel_map.va_pa_offset); return ((unsigned long)(x) - kernel_map.va_pa_offset); } EXPORT_SYMBOL(linear_mapping_va_to_pa); void *linear_mapping_pa_to_va(unsigned long x) { BUG_ON(!kernel_map.va_pa_offset); return ((void *)((unsigned long)(x) + kernel_map.va_pa_offset)); } EXPORT_SYMBOL(linear_mapping_pa_to_va);