1 #ifndef _ASM_X86_PAGE_64_H 2 #define _ASM_X86_PAGE_64_H 3 4 #include <asm/page_64_types.h> 5 6 #ifndef __ASSEMBLY__ 7 #include <asm/alternative.h> 8 9 /* duplicated to the one in bootmem.h */ 10 extern unsigned long max_pfn; 11 extern unsigned long phys_base; 12 13 static inline unsigned long __phys_addr_nodebug(unsigned long x) 14 { 15 unsigned long y = x - __START_KERNEL_map; 16 17 /* use the carry flag to determine if x was < __START_KERNEL_map */ 18 x = y + ((x > y) ? phys_base : (__START_KERNEL_map - PAGE_OFFSET)); 19 20 return x; 21 } 22 23 #ifdef CONFIG_DEBUG_VIRTUAL 24 extern unsigned long __phys_addr(unsigned long); 25 extern unsigned long __phys_addr_symbol(unsigned long); 26 #else 27 #define __phys_addr(x) __phys_addr_nodebug(x) 28 #define __phys_addr_symbol(x) \ 29 ((unsigned long)(x) - __START_KERNEL_map + phys_base) 30 #endif 31 32 #define __phys_reloc_hide(x) (x) 33 34 #ifdef CONFIG_FLATMEM 35 #define pfn_valid(pfn) ((pfn) < max_pfn) 36 #endif 37 38 void clear_page_orig(void *page); 39 void clear_page_rep(void *page); 40 void clear_page_erms(void *page); 41 42 static inline void clear_page(void *page) 43 { 44 alternative_call_2(clear_page_orig, 45 clear_page_rep, X86_FEATURE_REP_GOOD, 46 clear_page_erms, X86_FEATURE_ERMS, 47 "=D" (page), 48 "0" (page) 49 : "memory", "rax", "rcx"); 50 } 51 52 void copy_page(void *to, void *from); 53 54 #endif /* !__ASSEMBLY__ */ 55 56 #ifdef CONFIG_X86_VSYSCALL_EMULATION 57 # define __HAVE_ARCH_GATE_AREA 1 58 #endif 59 60 #endif /* _ASM_X86_PAGE_64_H */ 61