Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 1 | #ifndef _ASM_X86_PAGE_DEFS_H |
| 2 | #define _ASM_X86_PAGE_DEFS_H |
| 3 | |
| 4 | #include <linux/const.h> |
Yinghai Lu | 45635ab | 2010-12-27 16:47:54 -0800 | [diff] [blame] | 5 | #include <linux/types.h> |
Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 6 | |
| 7 | /* PAGE_SHIFT determines the page size */ |
| 8 | #define PAGE_SHIFT 12 |
| 9 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
| 10 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
| 11 | |
Namhyung Kim | a416e9e | 2010-09-29 23:29:48 +0900 | [diff] [blame] | 12 | #define __PHYSICAL_MASK ((phys_addr_t)((1ULL << __PHYSICAL_MASK_SHIFT) - 1)) |
Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 13 | #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) |
| 14 | |
| 15 | /* Cast PAGE_MASK to a signed type so that it is sign-extended if |
| 16 | virtual addresses are 32-bits but physical addresses are larger |
| 17 | (ie, 32-bit PAE). */ |
| 18 | #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) |
| 19 | |
Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 20 | #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) |
| 21 | #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) |
| 22 | |
| 23 | #define HPAGE_SHIFT PMD_SHIFT |
| 24 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) |
| 25 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) |
| 26 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) |
| 27 | |
| 28 | #define HUGE_MAX_HSTATE 2 |
| 29 | |
| 30 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) |
| 31 | |
| 32 | #define VM_DATA_DEFAULT_FLAGS \ |
| 33 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ |
| 34 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| 35 | |
Kees Cook | a021506 | 2013-07-08 09:15:17 -0700 | [diff] [blame] | 36 | #define __PHYSICAL_START ALIGN(CONFIG_PHYSICAL_START, \ |
| 37 | CONFIG_PHYSICAL_ALIGN) |
| 38 | |
| 39 | #define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START) |
| 40 | |
Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 41 | #ifdef CONFIG_X86_64 |
| 42 | #include <asm/page_64_types.h> |
Toshi Kani | 5d72b4f | 2015-04-14 15:47:29 -0700 | [diff] [blame] | 43 | #define IOREMAP_MAX_ORDER (PUD_SHIFT) |
Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 44 | #else |
| 45 | #include <asm/page_32_types.h> |
Toshi Kani | 5d72b4f | 2015-04-14 15:47:29 -0700 | [diff] [blame] | 46 | #define IOREMAP_MAX_ORDER (PMD_SHIFT) |
Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 47 | #endif /* CONFIG_X86_64 */ |
| 48 | |
| 49 | #ifndef __ASSEMBLY__ |
| 50 | |
Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 51 | extern int devmem_is_allowed(unsigned long pagenr); |
Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 52 | |
| 53 | extern unsigned long max_low_pfn_mapped; |
| 54 | extern unsigned long max_pfn_mapped; |
| 55 | |
Yinghai Lu | 4ce7a86 | 2014-01-27 17:06:50 -0800 | [diff] [blame] | 56 | static inline phys_addr_t get_max_mapped(void) |
Yinghai Lu | 45635ab | 2010-12-27 16:47:54 -0800 | [diff] [blame] | 57 | { |
Yinghai Lu | 4ce7a86 | 2014-01-27 17:06:50 -0800 | [diff] [blame] | 58 | return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT; |
Yinghai Lu | 45635ab | 2010-12-27 16:47:54 -0800 | [diff] [blame] | 59 | } |
| 60 | |
Jacob Shin | 66520eb | 2012-11-16 19:38:52 -0800 | [diff] [blame] | 61 | bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn); |
Jacob Shin | dda56e1 | 2012-11-16 19:38:48 -0800 | [diff] [blame] | 62 | |
Jaswinder Singh Rajput | 66aa230 | 2009-04-14 12:54:29 +0530 | [diff] [blame] | 63 | extern unsigned long init_memory_mapping(unsigned long start, |
| 64 | unsigned long end); |
| 65 | |
Tejun Heo | d8fc3af | 2011-02-16 12:13:06 +0100 | [diff] [blame] | 66 | extern void initmem_init(void); |
Jaswinder Singh Rajput | 66aa230 | 2009-04-14 12:54:29 +0530 | [diff] [blame] | 67 | |
Jeremy Fitzhardinge | 51c78eb | 2009-02-08 22:52:14 -0800 | [diff] [blame] | 68 | #endif /* !__ASSEMBLY__ */ |
| 69 | |
| 70 | #endif /* _ASM_X86_PAGE_DEFS_H */ |