Line data    Source code

       1             : /* SPDX-License-Identifier: GPL-2.0 */
       2             : #ifndef _ASM_X86_PAGE_64_H
       3             : #define _ASM_X86_PAGE_64_H
       4             : 
       5             : #include <asm/page_64_types.h>
       6             : 
       7             : #ifndef __ASSEMBLY__
       8             : #include <asm/alternative.h>
       9             : 
      10             : /* duplicated to the one in bootmem.h */
      11             : extern unsigned long max_pfn;
      12             : extern unsigned long phys_base;
      13             : 
      14             : extern unsigned long page_offset_base;
      15             : extern unsigned long vmalloc_base;
      16             : extern unsigned long vmemmap_base;
      17             : 
      18     6036629 : static inline unsigned long __phys_addr_nodebug(unsigned long x)
      19             : {
      20     5930080 :         unsigned long y = x - __START_KERNEL_map;
      21             : 
      22             :         /* use the carry flag to determine if x was < __START_KERNEL_map */
      23     5975972 :         x = y + ((x > y) ? phys_base : (__START_KERNEL_map - PAGE_OFFSET));
      24             : 
      25     5931327 :         return x;
      26             : }
      27             : 
      28             : #ifdef CONFIG_DEBUG_VIRTUAL
      29             : extern unsigned long __phys_addr(unsigned long);
      30             : extern unsigned long __phys_addr_symbol(unsigned long);
      31             : #else
      32             : #define __phys_addr(x)          __phys_addr_nodebug(x)
      33             : #define __phys_addr_symbol(x) \
      34             :         ((unsigned long)(x) - __START_KERNEL_map + phys_base)
      35             : #endif
      36             : 
      37             : #define __phys_reloc_hide(x)    (x)
      38             : 
      39             : #ifdef CONFIG_FLATMEM
      40             : #define pfn_valid(pfn)          ((pfn) < max_pfn)
      41             : #endif
      42             : 
      43             : void clear_page_orig(void *page);
      44             : void clear_page_rep(void *page);
      45             : void clear_page_erms(void *page);
      46             : 
      47       94564 : static inline void clear_page(void *page)
      48             : {
      49       94564 :         alternative_call_2(clear_page_orig,
      50             :                            clear_page_rep, X86_FEATURE_REP_GOOD,
      51             :                            clear_page_erms, X86_FEATURE_ERMS,
      52             :                            "=D" (page),
      53             :                            "0" (page)
      54             :                            : "cc", "memory", "rax", "rcx");
      55             : }
      56             : 
      57             : void copy_page(void *to, void *from);
      58             : 
      59             : #endif  /* !__ASSEMBLY__ */
      60             : 
      61             : #ifdef CONFIG_X86_VSYSCALL_EMULATION
      62             : # define __HAVE_ARCH_GATE_AREA 1
      63             : #endif
      64             : 
      65             : #endif /* _ASM_X86_PAGE_64_H */