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 11unsigned 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} 24EXPORT_SYMBOL(__phys_addr); 25 26bool __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} 43EXPORT_SYMBOL(__virt_addr_valid); 44 45#else 46 47#ifdef CONFIG_DEBUG_VIRTUAL 48unsigned 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} 55EXPORT_SYMBOL(__phys_addr); 56#endif 57 58bool __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} 68EXPORT_SYMBOL(__virt_addr_valid); 69 70#endif /* CONFIG_X86_64 */ 71