#ifndef _PARISC_PAGE_H #define _PARISC_PAGE_H /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 12 #define PAGE_SIZE (1UL << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #ifdef __KERNEL__ #include <linux/config.h> #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; extern void purge_kernel_dcache_page(unsigned long); extern void copy_user_page_asm(void *to, void *from); extern void clear_user_page_asm(void *page, unsigned long vaddr); static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg) { copy_user_page_asm(vto, vfrom); flush_kernel_dcache_page(vto); /* XXX: ppc flushes icache too, should we? */ } static inline void clear_user_page(void *page, unsigned long vaddr, struct page *pg) { purge_kernel_dcache_page((unsigned long)page); clear_user_page_asm(page, vaddr); } /* * These are used to make use of C type-checking.. */ #ifdef __LP64__ typedef struct { unsigned long pte; } pte_t; #else typedef struct { unsigned long pte; unsigned long flags; } pte_t; #endif /* 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) #ifdef __LP64__ #define pte_flags(x) (*(__u32 *)&((x).pte)) #else #define pte_flags(x) ((x).flags) #endif /* 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 __pmd_val_set(x,n) (x).pmd = (n) #define __pgd_val_set(x,n) (x).pgd = (n) #define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) /* Pure 2^n version of get_order */ extern __inline__ int get_order(unsigned long size) { int order; size = (size-1) >> (PAGE_SHIFT-1); order = -1; do { size >>= 1; order++; } while (size); return order; } 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 __LP64__ #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 */ #define __PAGE_OFFSET (0x10000000) #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_to_page(pfn) (mem_map + (pfn)) #define page_to_pfn(page) ((unsigned long)((page) - mem_map)) #define pfn_valid(pfn) ((pfn) < max_mapnr) #endif /* CONFIG_DISCONTIGMEM */ #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) #endif /* __KERNEL__ */ #endif /* _PARISC_PAGE_H */