#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__
#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(movableflags, vma, vaddr) \
alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, 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;
static inline unsigned long long native_pgd_val(pgd_t pgd)
{
return pgd.pgd;
}
static inline unsigned long long native_pmd_val(pmd_t pmd)
{
return pmd.pmd;
}
static inline unsigned long long native_pte_val(pte_t pte)
{
return pte.pte_low | ((unsigned long long)pte.pte_high << 32);
}
static inline pgd_t native_make_pgd(unsigned long long val)
{
return (pgd_t) { val };
}
static inline pmd_t native_make_pmd(unsigned long long val)
{
return (pmd_t) { val };
}
static inline pte_t native_make_pte(unsigned long long val)
{
return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ;
}
#ifndef CONFIG_PARAVIRT
#define pmd_val(x) native_pmd_val(x)
#define __pmd(x) native_make_pmd(x)
#endif
#define HPAGE_SHIFT 21
#include <asm-generic/pgtable-nopud.h>
#else /* !CONFIG_X86_PAE */
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 */
static inline unsigned long native_pgd_val(pgd_t pgd)
{
return pgd.pgd;
}
static inline unsigned long native_pte_val(pte_t pte)
{
return pte.pte_low;
}
static inline pgd_t native_make_pgd(unsigned long val)
{
return (pgd_t) { val };
}
static inline pte_t native_make_pte(unsigned long val)
{
return (pte_t) { .pte_low = val };
}
#define HPAGE_SHIFT 22
#include <asm-generic/pgtable-nopmd.h>
#endif /* CONFIG_X86_PAE */
#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 pgprot_val(x) ((x).pgprot)
#define __pgprot(x) ((pgprot_t) { (x) } )
#ifndef CONFIG_PARAVIRT
#define pgd_val(x) native_pgd_val(x)
#define __pgd(x) native_make_pgd(x)
#define pte_val(x) native_pte_val(x)
#define __pte(x) native_make_pte(x)
#endif
#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__
struct vm_area_struct;
/*
* This much address space is reserved for vmalloc() and iomap()
* as well as fixmap mappings.
*/
extern unsigned int __VMALLOC_RESERVE;
extern int sysctl_legacy_va_layout;
extern int page_is_ram(unsigned long pagenr);
#endif /* __ASSEMBLY__ */
#ifdef __ASSEMBLY__
#define __PAGE_OFFSET CONFIG_PAGE_OFFSET
#else
#define __PAGE_OFFSET ((unsigned long)CONFIG_PAGE_OFFSET)
#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)
/* __pa_symbol should be used for C visible symbols.
This seems to be the official gcc blessed way to do such arithmetic. */
#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x),0))
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
#ifdef CONFIG_FLATMEM
#define pfn_valid(pfn) ((pfn) < max_mapnr)
#endif /* CONFIG_FLATMEM */
#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)
#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>
#define __HAVE_ARCH_GATE_AREA 1
#endif /* __KERNEL__ */
#endif /* _I386_PAGE_H */
