/arch/sparc/include/asm/page_64.h
C++ Header | 137 lines | 90 code | 33 blank | 14 comment | 0 complexity | 42c16ecc15467330496da299780ade4b MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
1#ifndef _SPARC64_PAGE_H 2#define _SPARC64_PAGE_H 3 4#include <linux/const.h> 5 6#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB) 7#define PAGE_SHIFT 13 8#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) 9#define PAGE_SHIFT 16 10#else 11#error No page size specified in kernel configuration 12#endif 13 14#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 15#define PAGE_MASK (~(PAGE_SIZE-1)) 16 17/* Flushing for D-cache alias handling is only needed if 18 * the page size is smaller than 16K. 19 */ 20#if PAGE_SHIFT < 14 21#define DCACHE_ALIASING_POSSIBLE 22#endif 23 24#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) 25#define HPAGE_SHIFT 22 26#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) 27#define HPAGE_SHIFT 19 28#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) 29#define HPAGE_SHIFT 16 30#endif 31 32#ifdef CONFIG_HUGETLB_PAGE 33#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) 34#define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) 35#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 36#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA 37#endif 38 39#ifndef __ASSEMBLY__ 40 41#define WANT_PAGE_VIRTUAL 42 43extern void _clear_page(void *page); 44#define clear_page(X) _clear_page((void *)(X)) 45struct page; 46extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page); 47#define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) 48extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); 49 50/* Unlike sparc32, sparc64's parameter passing API is more 51 * sane in that structures which as small enough are passed 52 * in registers instead of on the stack. Thus, setting 53 * STRICT_MM_TYPECHECKS does not generate worse code so 54 * let's enable it to get the type checking. 55 */ 56 57#define STRICT_MM_TYPECHECKS 58 59#ifdef STRICT_MM_TYPECHECKS 60/* These are used to make use of C type-checking.. */ 61typedef struct { unsigned long pte; } pte_t; 62typedef struct { unsigned long iopte; } iopte_t; 63typedef struct { unsigned int pmd; } pmd_t; 64typedef struct { unsigned int pgd; } pgd_t; 65typedef struct { unsigned long pgprot; } pgprot_t; 66 67#define pte_val(x) ((x).pte) 68#define iopte_val(x) ((x).iopte) 69#define pmd_val(x) ((x).pmd) 70#define pgd_val(x) ((x).pgd) 71#define pgprot_val(x) ((x).pgprot) 72 73#define __pte(x) ((pte_t) { (x) } ) 74#define __iopte(x) ((iopte_t) { (x) } ) 75#define __pmd(x) ((pmd_t) { (x) } ) 76#define __pgd(x) ((pgd_t) { (x) } ) 77#define __pgprot(x) ((pgprot_t) { (x) } ) 78 79#else 80/* .. while these make it easier on the compiler */ 81typedef unsigned long pte_t; 82typedef unsigned long iopte_t; 83typedef unsigned int pmd_t; 84typedef unsigned int pgd_t; 85typedef unsigned long pgprot_t; 86 87#define pte_val(x) (x) 88#define iopte_val(x) (x) 89#define pmd_val(x) (x) 90#define pgd_val(x) (x) 91#define pgprot_val(x) (x) 92 93#define __pte(x) (x) 94#define __iopte(x) (x) 95#define __pmd(x) (x) 96#define __pgd(x) (x) 97#define __pgprot(x) (x) 98 99#endif /* (STRICT_MM_TYPECHECKS) */ 100 101typedef struct page *pgtable_t; 102 103#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ 104 (_AC(0x0000000070000000,UL)) : \ 105 (_AC(0xfffff80000000000,UL) + (1UL << 32UL))) 106 107#include <asm-generic/memory_model.h> 108 109#endif /* !(__ASSEMBLY__) */ 110 111/* We used to stick this into a hard-coded global register (%g4) 112 * but that does not make sense anymore. 113 */ 114#define PAGE_OFFSET _AC(0xFFFFF80000000000,UL) 115 116#ifndef __ASSEMBLY__ 117 118#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) 119#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) 120 121#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 122 123#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) 124 125#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 126 127#define virt_to_phys __pa 128#define phys_to_virt __va 129 130#endif /* !(__ASSEMBLY__) */ 131 132#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 133 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 134 135#include <asm-generic/getorder.h> 136 137#endif /* _SPARC64_PAGE_H */