| 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 = 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 | } |
| 35 | EXPORT_SYMBOL(__phys_addr_symbol); |
| 36 | |
| 37 | phys_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 | } |
| 43 | EXPORT_SYMBOL(linear_mapping_va_to_pa); |
| 44 | |
| 45 | void *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 | } |
| 51 | EXPORT_SYMBOL(linear_mapping_pa_to_va); |
| 52 |