#ifndef _PARISC_PAGE_H #define _PARISC_PAGE_H #ifdef __KERNEL__ #if defined(CONFIG_PARISC_PAGE_SIZE_4KB) # define PAGE_SHIFT 12 #elif defined(CONFIG_PARISC_PAGE_SIZE_16KB) # define PAGE_SHIFT 14 #elif defined(CONFIG_PARISC_PAGE_SIZE_64KB) # define PAGE_SHIFT 16 #else # error "unknown default kernel page size" #endif #define PAGE_SIZE (1UL << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #ifndef __ASSEMBLY__ #include <asm/types.h> #include <asm/cache.h> #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from)) struct page; void copy_user_page_asm(void *to, void *from); void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg); void clear_user_page(void *page, unsigned long vaddr, struct page *pg); /* * These are used to make use of C type-checking.. */ #define STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS typedef struct { unsigned long pte; #if !defined(CONFIG_64BIT) unsigned long future_flags; /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY to 2, but then strangely the identical 32bit kernel boots on a c3000(pa20), but not any longer on a 715(pa11). Still investigating... HelgeD. */ #endif } pte_t; /* either 32 or 64bit */ /* NOTE: even on 64 bits, these entries are __u32 because we allocate * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ typedef struct { __u32 pmd; } pmd_t; typedef struct { __u32 pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x) ((x).pte) /* These do not work lvalues, so make sure we don't use them as such. */ #define pmd_val(x) ((x).pmd + 0) #define pgd_val(x) ((x).pgd + 0) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #define __pmd_val_set(x,n) (x).pmd = (n) #define __pgd_val_set(x,n) (x).pgd = (n) #else /* * .. while these make it easier on the compiler */ typedef unsigned long pte_t; typedef __u32 pmd_t; typedef __u32 pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) #define pmd_val(x) (x) #define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) #define __pmd(x) (x) #define __pgd(x) (x) #define __pgprot(x) (x) #define __pmd_val_set(x,n) (x) = (n) #define __pgd_val_set(x,n) (x) = (n) #endif /* STRICT_MM_TYPECHECKS */ typedef struct __physmem_range { unsigned long start_pfn; unsigned long pages; /* PAGE_SIZE pages */ } physmem_range_t; extern physmem_range_t pmem_ranges[]; extern int npmem_ranges; #endif /* !__ASSEMBLY__ */ /* WARNING: The definitions below must match exactly to sizeof(pte_t) * etc */ #ifdef CONFIG_64BIT #define BITS_PER_PTE_ENTRY 3 #define BITS_PER_PMD_ENTRY 2 #define BITS_PER_PGD_ENTRY 2 #else #define BITS_PER_PTE_ENTRY 3 #define BITS_PER_PMD_ENTRY 2 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY #endif #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) #define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY) /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) #define LINUX_GATEWAY_SPACE 0 /* This governs the relationship between virtual and physical addresses. * If you alter it, make sure to take care of our various fixed mapping * segments in fixmap.h */ #ifdef CONFIG_64BIT #define __PAGE_OFFSET (0x40000000) /* 1GB */ #else #define __PAGE_OFFSET (0x10000000) /* 256MB */ #endif #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) /* The size of the gateway page (we leave lots of room for expansion) */ #define GATEWAY_PAGE_SIZE 0x4000 /* The start of the actual kernel binary---used in vmlinux.lds.S * Leave some space after __PAGE_OFFSET for detecting kernel null * ptr derefs */ #define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000) /* These macros don't work for 64-bit C code -- don't allow in C at all */ #ifdef __ASSEMBLY__ # define PA(x) ((x)-__PAGE_OFFSET) # define VA(x) ((x)+__PAGE_OFFSET) #endif #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) #ifndef CONFIG_DISCONTIGMEM #define pfn_valid(pfn) ((pfn) < max_mapnr) #endif /* CONFIG_DISCONTIGMEM */ #ifdef CONFIG_HUGETLB_PAGE #define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */ #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) #define HPAGE_MASK (~(HPAGE_SIZE - 1)) #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) #endif #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) #define virt_to_page(kaddr) pfn_to_page(__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> #endif /* __KERNEL__ */ #endif /* _PARISC_PAGE_H */