diff options
Diffstat (limited to 'arch/parisc/include/asm/page.h')
| -rw-r--r-- | arch/parisc/include/asm/page.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h new file mode 100644 index 00000000000..c3941f09a87 --- /dev/null +++ b/arch/parisc/include/asm/page.h @@ -0,0 +1,173 @@ +#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) 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 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 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) + +#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 /* _PARISC_PAGE_H */ |