/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle * Copyright (C) 1999, 2000 Silicon Graphics, Inc. */ #ifndef _ASM_PAGE_H #define _ASM_PAGE_H #include #include /* * PAGE_SHIFT determines the page size */ #ifdef CONFIG_PAGE_SIZE_4KB #define PAGE_SHIFT 12 #endif #ifdef CONFIG_PAGE_SIZE_8KB #define PAGE_SHIFT 13 #endif #ifdef CONFIG_PAGE_SIZE_16KB #define PAGE_SHIFT 14 #endif #ifdef CONFIG_PAGE_SIZE_32KB #define PAGE_SHIFT 15 #endif #ifdef CONFIG_PAGE_SIZE_64KB #define PAGE_SHIFT 16 #endif #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) /* this is used for calculation of real page sizes and should be the same */ #define BASIC_PAGE_SHIFT 12 #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT #define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3) #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #else /* !CONFIG_MIPS_HUGE_TLB_SUPPORT */ #define HPAGE_SHIFT ({BUILD_BUG(); 0; }) #define HPAGE_SIZE ({BUILD_BUG(); 0; }) #define HPAGE_MASK ({BUILD_BUG(); 0; }) #define HUGETLB_PAGE_ORDER ({BUILD_BUG(); 0; }) #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ #include extern void build_clear_page(void); extern void build_copy_page(void); /* * It's normally defined only for FLATMEM config but it's * used in our early mem init code for all memory models. * So always define it. */ #define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET) extern void clear_page(void * page); extern void copy_page(void * to, void * from); extern unsigned long shm_align_mask; static inline unsigned long pages_do_alias(unsigned long addr1, unsigned long addr2) { return (addr1 ^ addr2) & shm_align_mask; } struct page; #include static inline void clear_user_page(void *addr, unsigned long vaddr, struct page *page __maybe_unused) { extern void (*flush_data_cache_page)(unsigned long addr); clear_page(addr); if (cpu_has_vtag_dcache || (cpu_has_dc_aliases && pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))) flush_data_cache_page((unsigned long)addr); } extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *to); struct vm_area_struct; extern void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, struct vm_area_struct *vma); #define __HAVE_ARCH_COPY_USER_HIGHPAGE /* * These are used to make use of C type-checking.. */ #ifdef CONFIG_64BIT_PHYS_ADDR #ifdef CONFIG_CPU_MIPS32 typedef struct { unsigned long pte_low, pte_high; } pte_t; #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) #define __pte(x) ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; }) #else typedef struct { unsigned long long pte; } pte_t; #define pte_val(x) ((x).pte) #define __pte(x) ((pte_t) { (x) } ) #endif #else typedef struct { unsigned long pte; } pte_t; #define pte_val(x) ((x).pte) #define __pte(x) ((pte_t) { (x) } ) #endif typedef struct page *pgtable_t; /* * Right now we don't support 4-level pagetables, so all pud-related * definitions come from . */ /* * Finall the top of the hierarchy, the pgd */ typedef struct { unsigned long pgd; } pgd_t; #define pgd_val(x) ((x).pgd) #define __pgd(x) ((pgd_t) { (x) } ) /* * Manipulate page protection bits */ typedef struct { unsigned long pgprot; } pgprot_t; #define pgprot_val(x) ((x).pgprot) #define __pgprot(x) ((pgprot_t) { (x) } ) /* * On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd * pair of pages we only have a single global bit per pair of pages. When * writing to the TLB make sure we always have the bit set for both pages * or none. This macro is used to access the `buddy' of the pte we're just * working on. */ #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) /* * __pa()/__va() should be used only during mem init. */ #ifdef CONFIG_64BIT #define __pa(x) \ ({ \ unsigned long __x = (unsigned long)(x); \ __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x); \ }) #else #define __pa(x) \ ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET) #endif #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) #include /* * RELOC_HIDE was originally added by 6007b903dfe5f1d13e0c711ac2894bdd4a61b1ad * (lmo) rsp. 8431fd094d625b94d364fe393076ccef88e6ce18 (kernel.org). The * discussion can be found in lkml posting * which is * archived at http://lists.linuxcoding.com/kernel/2006-q3/msg17360.html * * It is unclear if the misscompilations mentioned in * http://lkml.org/lkml/2010/8/8/138 also affect MIPS so we keep this one * until GCC 3.x has been retired before we can apply * https://patchwork.linux-mips.org/patch/1541/ */ #ifndef __pa_symbol #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) #endif #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #ifdef CONFIG_FLATMEM static inline int pfn_valid(unsigned long pfn) { /* avoid include hell */ extern unsigned long max_mapnr; return #if ARCH_PFN_OFFSET > 0 pfn >= ARCH_PFN_OFFSET && #endif pfn < max_mapnr; } #elif defined(CONFIG_SPARSEMEM) /* pfn_valid is defined in linux/mmzone.h */ #elif defined(CONFIG_NEED_MULTIPLE_NODES) #define pfn_valid(pfn) \ ({ \ unsigned long __pfn = (pfn); \ int __n = pfn_to_nid(__pfn); \ ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \ NODE_DATA(__n)->node_spanned_pages) \ : 0); \ }) #endif #define virt_to_page(kaddr) pfn_to_page(PFN_DOWN(virt_to_phys(kaddr))) extern int __virt_addr_valid(const volatile void *kaddr); #define virt_addr_valid(kaddr) \ __virt_addr_valid((const volatile void *) (kaddr)) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #define VM_STACK_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE) #define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET) #include #include #endif /* _ASM_PAGE_H */