#ifndef __ASM_SH_PAGE_H #define __ASM_SH_PAGE_H /* * Copyright (C) 1999 Niibe Yutaka */ /* [ P0/U0 (virtual) ] 0x00000000 <------ User space [ P1 (fixed) cached ] 0x80000000 <------ Kernel space [ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access [ P3 (virtual) cached] 0xC0000000 <------ vmalloced area [ P4 control ] 0xE0000000 */ #ifdef __KERNEL__ /* PAGE_SHIFT determines the page size */ #if defined(CONFIG_PAGE_SIZE_4KB) # define PAGE_SHIFT 12 #elif defined(CONFIG_PAGE_SIZE_8KB) # define PAGE_SHIFT 13 #elif defined(CONFIG_PAGE_SIZE_64KB) # define PAGE_SHIFT 16 #else # error "Bogus kernel page size?" #endif #ifdef __ASSEMBLY__ #define PAGE_SIZE (1 << PAGE_SHIFT) #else #define PAGE_SIZE (1UL << PAGE_SHIFT) #endif #define PAGE_MASK (~(PAGE_SIZE-1)) #define PTE_MASK PAGE_MASK #if defined(CONFIG_HUGETLB_PAGE_SIZE_64K) #define HPAGE_SHIFT 16 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K) #define HPAGE_SHIFT 18 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB) #define HPAGE_SHIFT 20 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) #define HPAGE_SHIFT 22 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB) #define HPAGE_SHIFT 26 #endif #ifdef CONFIG_HUGETLB_PAGE #define HPAGE_SIZE (1UL << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE-1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT) #endif #ifndef __ASSEMBLY__ extern void (*clear_page)(void *to); extern void (*copy_page)(void *to, void *from); extern unsigned long shm_align_mask; extern unsigned long max_low_pfn, min_low_pfn; extern unsigned long memory_start, memory_end; #ifdef CONFIG_MMU extern void clear_page_slow(void *to); extern void copy_page_slow(void *to, void *from); #else extern void clear_page_nommu(void *to); extern void copy_page_nommu(void *to, void *from); #endif #if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU) && \ (defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)) struct page; extern void clear_user_page(void *to, unsigned long address, struct page *pg); extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg); extern void __clear_user_page(void *to, void *orig_to); extern void __copy_user_page(void *to, void *from, void *orig_to); #else #define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) #endif /* * These are used to make use of C type-checking.. */ #ifdef CONFIG_X2TLB typedef struct { unsigned long pte_low, pte_high; } pte_t; typedef struct { unsigned long long pgprot; } pgprot_t; typedef struct { unsigned long long pgd; } pgd_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 pte_low; } pte_t; typedef struct { unsigned long pgprot; } pgprot_t; typedef struct { unsigned long pgd; } pgd_t; #define pte_val(x) ((x).pte_low) #define __pte(x) ((pte_t) { (x) } ) #endif #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #endif /* !__ASSEMBLY__ */ /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) /* * IF YOU CHANGE THIS, PLEASE ALSO CHANGE * * arch/sh/kernel/vmlinux.lds.S * * which has the same constant encoded.. */ #define __MEMORY_START CONFIG_MEMORY_START #define __MEMORY_SIZE CONFIG_MEMORY_SIZE #define PAGE_OFFSET CONFIG_PAGE_OFFSET #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) #define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT)) #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) /* PFN start number, because of __MEMORY_START */ #define PFN_START (__MEMORY_START >> PAGE_SHIFT) #define ARCH_PFN_OFFSET (PFN_START) #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #ifdef CONFIG_FLATMEM #define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn) #endif #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #include <asm-generic/memory_model.h> #include <asm-generic/page.h> /* vDSO support */ #ifdef CONFIG_VSYSCALL #define __HAVE_ARCH_GATE_AREA #endif /* * Slub defaults to 8-byte alignment, we're only interested in 4. * Slab defaults to BYTES_PER_WORD, which ends up being the same anyways. */ #define ARCH_KMALLOC_MINALIGN 4 #define ARCH_SLAB_MINALIGN 4 #endif /* __KERNEL__ */ #endif /* __ASM_SH_PAGE_H */