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#ifndef _X86_64_PAGE_H
#define _X86_64_PAGE_H
#include <linux/config.h>
/* #include <linux/string.h> */
#ifndef __ASSEMBLY__
#include <linux/types.h>
#endif
#include <asm-xen/xen-public/xen.h>
#include <asm-xen/foreign_page.h>
#define arch_free_page(_page,_order) \
({ int foreign = PageForeign(_page); \
if (foreign) \
(PageForeignDestructor(_page))(_page); \
foreign; \
})
#define HAVE_ARCH_FREE_PAGE
#ifdef CONFIG_XEN_SCRUB_PAGES
#define scrub_pages(_p,_n) memset((void *)(_p), 0, (_n) << PAGE_SHIFT)
#else
#define scrub_pages(_p,_n) ((void)0)
#endif
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
#ifdef __ASSEMBLY__
#define PAGE_SIZE (0x1 << PAGE_SHIFT)
#else
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#endif
#define PAGE_MASK (~(PAGE_SIZE-1))
#define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & (__PHYSICAL_MASK << PAGE_SHIFT))
#define THREAD_ORDER 1
#ifdef __ASSEMBLY__
#define THREAD_SIZE (1 << (PAGE_SHIFT + THREAD_ORDER))
#else
#define THREAD_SIZE (1UL << (PAGE_SHIFT + THREAD_ORDER))
#endif
#define CURRENT_MASK (~(THREAD_SIZE-1))
#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
#define HPAGE_SHIFT PMD_SHIFT
#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
void clear_page(void *);
void copy_page(void *, void *);
#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
/**** MACHINE <-> PHYSICAL CONVERSION MACROS ****/
extern u32 *phys_to_machine_mapping;
#define pfn_to_mfn(_pfn) ((unsigned long) phys_to_machine_mapping[(unsigned int)(_pfn)])
#define mfn_to_pfn(_mfn) ((unsigned long) machine_to_phys_mapping[(unsigned int)(_mfn)])
static inline unsigned long phys_to_machine(unsigned long phys)
{
unsigned long machine = pfn_to_mfn(phys >> PAGE_SHIFT);
machine = (machine << PAGE_SHIFT) | (phys & ~PAGE_MASK);
return machine;
}
static inline unsigned long machine_to_phys(unsigned long machine)
{
unsigned long phys = mfn_to_pfn(machine >> PAGE_SHIFT);
phys = (phys << PAGE_SHIFT) | (machine & ~PAGE_MASK);
return phys;
}
/*
* These are used to make use of C type-checking..
*/
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pud; } pud_t;
typedef struct { unsigned long pgd; } pgd_t;
#define PTE_MASK PHYSICAL_PAGE_MASK
typedef struct { unsigned long pgprot; } pgprot_t;
#define pte_val(x) (((x).pte & 1) ? machine_to_phys((x).pte) : \
(x).pte)
#define pte_val_ma(x) ((x).pte)
static inline unsigned long pmd_val(pmd_t x)
{
unsigned long ret = x.pmd;
if (ret) ret = machine_to_phys(ret);
return ret;
}
static inline unsigned long pud_val(pud_t x)
{
unsigned long ret = x.pud;
if (ret) ret = machine_to_phys(ret);
return ret;
}
static inline unsigned long pgd_val(pgd_t x)
{
unsigned long ret = x.pgd;
if (ret) ret = machine_to_phys(ret);
return ret;
}
#define pgprot_val(x) ((x).pgprot)
#define __pte_ma(x) ((pte_t) { (x) } )
static inline pte_t __pte(unsigned long x)
{
if (x & 1) x = phys_to_machine(x);
return ((pte_t) { (x) });
}
static inline pmd_t __pmd(unsigned long x)
{
if ((x & 1)) x = phys_to_machine(x);
return ((pmd_t) { (x) });
}
static inline pud_t __pud(unsigned long x)
{
if ((x & 1)) x = phys_to_machine(x);
return ((pud_t) { (x) });
}
static inline pgd_t __pgd(unsigned long x)
{
if ((x & 1)) x = phys_to_machine(x);
return ((pgd_t) { (x) });
}
#define __pgprot(x) ((pgprot_t) { (x) } )
extern unsigned long vm_stack_flags, vm_stack_flags32;
extern unsigned long vm_data_default_flags, vm_data_default_flags32;
extern unsigned long vm_force_exec32;
#define __START_KERNEL 0xffffffff80100000UL
#define __START_KERNEL_map 0xffffffff80000000UL
#define __PAGE_OFFSET 0xffff880000000000UL
#else
#define __START_KERNEL 0xffffffff80100000
#define __START_KERNEL_map 0xffffffff80000000
#define __PAGE_OFFSET 0xffff880000000000
#endif /* !__ASSEMBLY__ */
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
/* See Documentation/x86_64/mm.txt for a description of the memory map. */
#define __PHYSICAL_MASK_SHIFT 46
#define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1)
#define __VIRTUAL_MASK_SHIFT 48
#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
#define KERNEL_TEXT_SIZE (40UL*1024*1024)
#define KERNEL_TEXT_START 0xffffffff80000000UL
#ifndef __ASSEMBLY__
#include <asm/bug.h>
/* 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;
}
#endif /* __ASSEMBLY__ */
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
/* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
Otherwise you risk miscompilation. */
#define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(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) \
({unsigned long v; \
asm("" : "=r" (v) : "0" (x)); \
__pa(v); })
#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
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
/* VIRT <-> MACHINE conversion */
#define virt_to_machine(_a) (phys_to_machine(__pa(_a)))
#define machine_to_virt(_m) (__va(machine_to_phys(_m)))
#define VM_DATA_DEFAULT_FLAGS \
(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#define __HAVE_ARCH_GATE_AREA 1
#endif /* __KERNEL__ */
#endif /* _X86_64_PAGE_H */
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