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Diffstat (limited to 'include/asm-i386/page.h')
| -rw-r--r-- | include/asm-i386/page.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/include/asm-i386/page.h b/include/asm-i386/page.h new file mode 100644 index 00000000000..ed13969fa2d --- /dev/null +++ b/include/asm-i386/page.h @@ -0,0 +1,153 @@ +#ifndef _I386_PAGE_H +#define _I386_PAGE_H + +/* PAGE_SHIFT determines the page size */ +#define PAGE_SHIFT 12 +#define PAGE_SIZE (1UL << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) +#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT) + +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +#include <linux/config.h> + +#ifdef CONFIG_X86_USE_3DNOW + +#include <asm/mmx.h> + +#define clear_page(page) mmx_clear_page((void *)(page)) +#define copy_page(to,from) mmx_copy_page(to,from) + +#else + +/* + * On older X86 processors it's not a win to use MMX here it seems. + * Maybe the K6-III ? + */ + +#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) +#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) + +#endif + +#define clear_user_page(page, vaddr, pg) clear_page(page) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) + +#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) +#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE + +/* + * These are used to make use of C type-checking.. + */ +extern int nx_enabled; +#ifdef CONFIG_X86_PAE +extern unsigned long long __supported_pte_mask; +typedef struct { unsigned long pte_low, pte_high; } pte_t; +typedef struct { unsigned long long pmd; } pmd_t; +typedef struct { unsigned long long pgd; } pgd_t; +typedef struct { unsigned long long pgprot; } pgprot_t; +#define pmd_val(x) ((x).pmd) +#define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) +#define __pmd(x) ((pmd_t) { (x) } ) +#define HPAGE_SHIFT 21 +#else +typedef struct { unsigned long pte_low; } pte_t; +typedef struct { unsigned long pgd; } pgd_t; +typedef struct { unsigned long pgprot; } pgprot_t; +#define boot_pte_t pte_t /* or would you rather have a typedef */ +#define pte_val(x) ((x).pte_low) +#define HPAGE_SHIFT 22 +#endif +#define PTE_MASK PAGE_MASK + +#ifdef CONFIG_HUGETLB_PAGE +#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) +#define HPAGE_MASK (~(HPAGE_SIZE - 1)) +#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) +#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA +#endif + +#define pgd_val(x) ((x).pgd) +#define pgprot_val(x) ((x).pgprot) + +#define __pte(x) ((pte_t) { (x) } ) +#define __pgd(x) ((pgd_t) { (x) } ) +#define __pgprot(x) ((pgprot_t) { (x) } ) + +#endif /* !__ASSEMBLY__ */ + +/* to align the pointer to the (next) page boundary */ +#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) + +/* + * This handles the memory map.. We could make this a config + * option, but too many people screw it up, and too few need + * it. + * + * A __PAGE_OFFSET of 0xC0000000 means that the kernel has + * a virtual address space of one gigabyte, which limits the + * amount of physical memory you can use to about 950MB. + * + * If you want more physical memory than this then see the CONFIG_HIGHMEM4G + * and CONFIG_HIGHMEM64G options in the kernel configuration. + */ + +#ifndef __ASSEMBLY__ + +/* + * This much address space is reserved for vmalloc() and iomap() + * as well as fixmap mappings. + */ +extern unsigned int __VMALLOC_RESERVE; + +/* Pure 2^n version of get_order */ +static __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; +} + +extern int sysctl_legacy_va_layout; + +#endif /* __ASSEMBLY__ */ + +#ifdef __ASSEMBLY__ +#define __PAGE_OFFSET (0xC0000000) +#else +#define __PAGE_OFFSET (0xC0000000UL) +#endif + + +#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) +#define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE) +#define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE) +#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) +#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_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) + +#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) + +#define VM_DATA_DEFAULT_FLAGS \ + (VM_READ | VM_WRITE | \ + ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#endif /* __KERNEL__ */ + +#endif /* _I386_PAGE_H */ |