| #ifndef _PARISC_PAGE_H | |
| #define _PARISC_PAGE_H | |
| #include <linux/const.h> | |
| #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 (_AC(1,UL) << PAGE_SHIFT) | |
| #define PAGE_MASK (~(PAGE_SIZE-1)) | |
| #ifndef __ASSEMBLY__ | |
| #include <asm/types.h> | |
| #include <asm/cache.h> | |
| #define clear_page(page) clear_page_asm((void *)(page)) | |
| #define copy_page(to, from) copy_page_asm((void *)(to), (void *)(from)) | |
| struct page; | |
| void clear_page_asm(void *page); | |
| void copy_page_asm(void *to, void *from); | |
| #define clear_user_page(vto, vaddr, page) clear_page_asm(vto) | |
| void copy_user_page(void *vto, void *vfrom, 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; } 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 page *pgtable_t; | |
| 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 2 | |
| #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) | |
| #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 PMD_SHIFT /* fixed for transparent huge pages */ | |
| #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) | |
| #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
| #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
| #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) | |
| # define REAL_HPAGE_SHIFT 20 /* 20 = 1MB */ | |
| # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_1M | |
| #elif !defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) | |
| # define REAL_HPAGE_SHIFT 22 /* 22 = 4MB */ | |
| # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4M | |
| #else | |
| # define REAL_HPAGE_SHIFT 24 /* 24 = 16MB */ | |
| # define _HUGE_PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16M | |
| #endif | |
| #endif /* CONFIG_HUGETLB_PAGE */ | |
| #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/getorder.h> | |
| #include <asm/pdc.h> | |
| #define PAGE0 ((struct zeropage *)__PAGE_OFFSET) | |
| /* DEFINITION OF THE ZERO-PAGE (PAG0) */ | |
| /* based on work by Jason Eckhardt (jason@equator.com) */ | |
| #endif /* _PARISC_PAGE_H */ |