/* $Id: page.h,v 1.39 2002/02/09 19:49:31 davem Exp $ */ #ifndef _SPARC64_PAGE_H #define _SPARC64_PAGE_H #include <linux/const.h> #if defined(CONFIG_SPARC64_PAGE_SIZE_8KB) #define PAGE_SHIFT 13 #elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB) #define PAGE_SHIFT 16 #elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB) #define PAGE_SHIFT 19 #elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB) #define PAGE_SHIFT 22 #else #error No page size specified in kernel configuration #endif #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) /* Flushing for D-cache alias handling is only needed if * the page size is smaller than 16K. */ #if PAGE_SHIFT < 14 #define DCACHE_ALIASING_POSSIBLE #endif #if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) #define HPAGE_SHIFT 22 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K) #define HPAGE_SHIFT 19 #elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K) #define HPAGE_SHIFT 16 #endif #ifdef CONFIG_HUGETLB_PAGE #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #define ARCH_HAS_SETCLEAR_HUGE_PTE #define ARCH_HAS_HUGETLB_PREFAULT_HOOK #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA #endif #ifndef __ASSEMBLY__ extern void _clear_page(void *page); #define clear_page(X) _clear_page((void *)(X)) struct page; extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page); #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); /* Unlike sparc32, sparc64's parameter passing API is more * sane in that structures which as small enough are passed * in registers instead of on the stack. Thus, setting * STRICT_MM_TYPECHECKS does not generate worse code so * let's enable it to get the type checking. */ #define STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS /* These are used to make use of C type-checking.. */ typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned long iopte; } iopte_t; typedef struct { unsigned int pmd; } pmd_t; typedef struct { unsigned int pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x) ((x).pte) #define iopte_val(x) ((x).iopte) #define pmd_val(x) ((x).pmd) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) #define __iopte(x) ((iopte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #else /* .. while these make it easier on the compiler */ typedef unsigned long pte_t; typedef unsigned long iopte_t; typedef unsigned int pmd_t; typedef unsigned int pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) #define iopte_val(x) (x) #define pmd_val(x) (x) #define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) #define __iopte(x) (x) #define __pmd(x) (x) #define __pgd(x) (x) #define __pgprot(x) (x) #endif /* (STRICT_MM_TYPECHECKS) */ typedef struct page *pgtable_t; #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ (_AC(0x0000000070000000,UL)) : \ (_AC(0xfffff80000000000,UL) + (1UL << 32UL))) #include <asm-generic/memory_model.h> #endif /* !(__ASSEMBLY__) */ /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) /* We used to stick this into a hard-coded global register (%g4) * but that does not make sense anymore. */ #define PAGE_OFFSET _AC(0xFFFFF80000000000,UL) #ifndef __ASSEMBLY__ #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 virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define virt_to_phys __pa #define phys_to_virt __va #endif /* !(__ASSEMBLY__) */ #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #include <asm-generic/page.h> #endif /* _SPARC64_PAGE_H */