Line data    Source code

       1             : /* SPDX-License-Identifier: GPL-2.0 */
       2             : #ifndef _ASM_X86_PAGE_DEFS_H
       3             : #define _ASM_X86_PAGE_DEFS_H
       4             : 
       5             : #include <linux/const.h>
       6             : #include <linux/types.h>
       7             : #include <linux/mem_encrypt.h>
       8             : 
       9             : /* PAGE_SHIFT determines the page size */
      10             : #define PAGE_SHIFT              12
      11             : #define PAGE_SIZE               (_AC(1,UL) << PAGE_SHIFT)
      12             : #define PAGE_MASK               (~(PAGE_SIZE-1))
      13             : 
      14             : #define PMD_PAGE_SIZE           (_AC(1, UL) << PMD_SHIFT)
      15             : #define PMD_PAGE_MASK           (~(PMD_PAGE_SIZE-1))
      16             : 
      17             : #define PUD_PAGE_SIZE           (_AC(1, UL) << PUD_SHIFT)
      18             : #define PUD_PAGE_MASK           (~(PUD_PAGE_SIZE-1))
      19             : 
      20             : #define __VIRTUAL_MASK          ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
      21             : 
      22             : /* Cast *PAGE_MASK to a signed type so that it is sign-extended if
      23             :    virtual addresses are 32-bits but physical addresses are larger
      24             :    (ie, 32-bit PAE). */
      25             : #define PHYSICAL_PAGE_MASK      (((signed long)PAGE_MASK) & __PHYSICAL_MASK)
      26             : #define PHYSICAL_PMD_PAGE_MASK  (((signed long)PMD_PAGE_MASK) & __PHYSICAL_MASK)
      27             : #define PHYSICAL_PUD_PAGE_MASK  (((signed long)PUD_PAGE_MASK) & __PHYSICAL_MASK)
      28             : 
      29             : #define HPAGE_SHIFT             PMD_SHIFT
      30             : #define HPAGE_SIZE              (_AC(1,UL) << HPAGE_SHIFT)
      31             : #define HPAGE_MASK              (~(HPAGE_SIZE - 1))
      32             : #define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
      33             : 
      34             : #define HUGE_MAX_HSTATE 2
      35             : 
      36             : #define PAGE_OFFSET             ((unsigned long)__PAGE_OFFSET)
      37             : 
      38             : #define VM_DATA_DEFAULT_FLAGS   VM_DATA_FLAGS_TSK_EXEC
      39             : 
      40             : #define __PHYSICAL_START        ALIGN(CONFIG_PHYSICAL_START, \
      41             :                                       CONFIG_PHYSICAL_ALIGN)
      42             : 
      43             : #define __START_KERNEL          (__START_KERNEL_map + __PHYSICAL_START)
      44             : 
      45             : #ifdef CONFIG_X86_64
      46             : #include <asm/page_64_types.h>
      47             : #define IOREMAP_MAX_ORDER       (PUD_SHIFT)
      48             : #else
      49             : #include <asm/page_32_types.h>
      50             : #define IOREMAP_MAX_ORDER       (PMD_SHIFT)
      51             : #endif  /* CONFIG_X86_64 */
      52             : 
      53             : #ifndef __ASSEMBLY__
      54             : 
      55             : #ifdef CONFIG_DYNAMIC_PHYSICAL_MASK
      56             : extern phys_addr_t physical_mask;
      57             : #define __PHYSICAL_MASK         physical_mask
      58             : #else
      59             : #define __PHYSICAL_MASK         ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1))
      60             : #endif
      61             : 
      62             : extern int devmem_is_allowed(unsigned long pagenr);
      63             : 
      64             : extern unsigned long max_low_pfn_mapped;
      65             : extern unsigned long max_pfn_mapped;
      66             : 
      67           1 : static inline phys_addr_t get_max_mapped(void)
      68             : {
      69           1 :         return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
      70             : }
      71             : 
      72             : bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
      73             : 
      74             : extern void initmem_init(void);
      75             : 
      76             : #endif  /* !__ASSEMBLY__ */
      77             : 
      78             : #endif  /* _ASM_X86_PAGE_DEFS_H */