projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 78c86e5e JF |
1 | #include <linux/mmdebug.h> |
| 2 | #include <linux/module.h> | |
| 3 | #include <linux/mm.h> | |
| 4 | ||
| 5 | #include <asm/page.h> | |
| 6 | ||
| 7 | #include "physaddr.h" | |
| 8 | ||
| 9 | #ifdef CONFIG_X86_64 | |
| 10 | ||
| 11 | unsigned long __phys_addr(unsigned long x) | |
| 12 | { | |
| 13 | if (x >= __START_KERNEL_map) { | |
| 14 | x -= __START_KERNEL_map; | |
| 15 | VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE); | |
| 16 | x += phys_base; | |
| 17 | } else { | |
| 18 | VIRTUAL_BUG_ON(x < PAGE_OFFSET); | |
| 19 | x -= PAGE_OFFSET; | |
| 20 | VIRTUAL_BUG_ON(!phys_addr_valid(x)); | |
| 21 | } | |
| 22 | return x; | |
| 23 | } | |
| 24 | EXPORT_SYMBOL(__phys_addr); | |
| 25 | ||
| 26 | bool __virt_addr_valid(unsigned long x) | |
| 27 | { | |
| 28 | if (x >= __START_KERNEL_map) { | |
| 29 | x -= __START_KERNEL_map; | |
| 30 | if (x >= KERNEL_IMAGE_SIZE) | |
| 31 | return false; | |
| 32 | x += phys_base; | |
| 33 | } else { | |
| 34 | if (x < PAGE_OFFSET) | |
| 35 | return false; | |
| 36 | x -= PAGE_OFFSET; | |
| 37 | if (!phys_addr_valid(x)) | |
| 38 | return false; | |
| 39 | } | |
| 40 | ||
| 41 | return pfn_valid(x >> PAGE_SHIFT); | |
| 42 | } | |
| 43 | EXPORT_SYMBOL(__virt_addr_valid); | |
| 44 | ||
| 45 | #else | |
| 46 | ||
| 47 | #ifdef CONFIG_DEBUG_VIRTUAL | |
| 48 | unsigned long __phys_addr(unsigned long x) | |
| 49 | { | |
| 50 | /* VMALLOC_* aren't constants */ | |
| 51 | VIRTUAL_BUG_ON(x < PAGE_OFFSET); | |
| 52 | VIRTUAL_BUG_ON(__vmalloc_start_set && is_vmalloc_addr((void *) x)); | |
| 53 | return x - PAGE_OFFSET; | |
| 54 | } | |
| 55 | EXPORT_SYMBOL(__phys_addr); | |
| 56 | #endif | |
| 57 | ||
| 58 | bool __virt_addr_valid(unsigned long x) | |
| 59 | { | |
| 60 | if (x < PAGE_OFFSET) | |
| 61 | return false; | |
| 62 | if (__vmalloc_start_set && is_vmalloc_addr((void *) x)) | |
| 63 | return false; | |
| 64 | if (x >= FIXADDR_START) | |
| 65 | return false; | |
| 66 | return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT); | |
| 67 | } | |
| 68 | EXPORT_SYMBOL(__virt_addr_valid); | |
| 69 | ||
| 70 | #endif /* CONFIG_X86_64 */ |