232 lines
6.4 KiB
C
232 lines
6.4 KiB
C
#ifndef _ASM_IA64_PAGE_H
|
|
#define _ASM_IA64_PAGE_H
|
|
/*
|
|
* Pagetable related stuff.
|
|
*
|
|
* Copyright (C) 1998, 1999, 2002 Hewlett-Packard Co
|
|
* David Mosberger-Tang <davidm@hpl.hp.com>
|
|
*/
|
|
|
|
|
|
#include <asm/intrinsics.h>
|
|
#include <asm/types.h>
|
|
|
|
/*
|
|
* The top three bits of an IA64 address are its Region Number.
|
|
* Different regions are assigned to different purposes.
|
|
*/
|
|
#define RGN_SHIFT (61)
|
|
#define RGN_BASE(r) (__IA64_UL_CONST(r)<<RGN_SHIFT)
|
|
#define RGN_BITS (RGN_BASE(-1))
|
|
|
|
#define RGN_KERNEL 7 /* Identity mapped region */
|
|
#define RGN_UNCACHED 6 /* Identity mapped I/O region */
|
|
#define RGN_GATE 5 /* Gate page, Kernel text, etc */
|
|
#define RGN_HPAGE 4 /* For Huge TLB pages */
|
|
|
|
/*
|
|
* PAGE_SHIFT determines the actual kernel page size.
|
|
*/
|
|
#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
|
|
# define PAGE_SHIFT 12
|
|
#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
|
|
# define PAGE_SHIFT 13
|
|
#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
|
|
# define PAGE_SHIFT 14
|
|
#elif defined(CONFIG_IA64_PAGE_SIZE_64KB)
|
|
# define PAGE_SHIFT 16
|
|
#else
|
|
# error Unsupported page size!
|
|
#endif
|
|
|
|
#define PAGE_SIZE (__IA64_UL_CONST(1) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE - 1))
|
|
#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
|
|
|
|
#define PERCPU_PAGE_SHIFT 16 /* log2() of max. size of per-CPU area */
|
|
#define PERCPU_PAGE_SIZE (__IA64_UL_CONST(1) << PERCPU_PAGE_SHIFT)
|
|
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
# define HPAGE_REGION_BASE RGN_BASE(RGN_HPAGE)
|
|
# define HPAGE_SHIFT hpage_shift
|
|
# define HPAGE_SHIFT_DEFAULT 28 /* check ia64 SDM for architecture supported size */
|
|
# define HPAGE_SIZE (__IA64_UL_CONST(1) << HPAGE_SHIFT)
|
|
# define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
|
|
# define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
|
|
# define ARCH_HAS_HUGEPAGE_ONLY_RANGE
|
|
# define ARCH_HAS_PREPARE_HUGEPAGE_RANGE
|
|
# define ARCH_HAS_HUGETLB_FREE_PGD_RANGE
|
|
#endif /* CONFIG_HUGETLB_PAGE */
|
|
|
|
#ifdef __ASSEMBLY__
|
|
# define __pa(x) ((x) - PAGE_OFFSET)
|
|
# define __va(x) ((x) + PAGE_OFFSET)
|
|
#else /* !__ASSEMBLY */
|
|
# ifdef __KERNEL__
|
|
# define STRICT_MM_TYPECHECKS
|
|
|
|
extern void clear_page (void *page);
|
|
extern void copy_page (void *to, void *from);
|
|
|
|
/*
|
|
* clear_user_page() and copy_user_page() can't be inline functions because
|
|
* flush_dcache_page() can't be defined until later...
|
|
*/
|
|
#define clear_user_page(addr, vaddr, page) \
|
|
do { \
|
|
clear_page(addr); \
|
|
flush_dcache_page(page); \
|
|
} while (0)
|
|
|
|
#define copy_user_page(to, from, vaddr, page) \
|
|
do { \
|
|
copy_page((to), (from)); \
|
|
flush_dcache_page(page); \
|
|
} while (0)
|
|
|
|
|
|
#define alloc_zeroed_user_highpage(vma, vaddr) \
|
|
({ \
|
|
struct page *page = alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr); \
|
|
if (page) \
|
|
flush_dcache_page(page); \
|
|
page; \
|
|
})
|
|
|
|
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
|
|
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#ifdef CONFIG_VIRTUAL_MEM_MAP
|
|
extern int ia64_pfn_valid (unsigned long pfn);
|
|
#elif defined(CONFIG_FLATMEM)
|
|
# define ia64_pfn_valid(pfn) 1
|
|
#endif
|
|
|
|
#ifdef CONFIG_VIRTUAL_MEM_MAP
|
|
extern struct page *vmem_map;
|
|
#ifdef CONFIG_DISCONTIGMEM
|
|
# define page_to_pfn(page) ((unsigned long) (page - vmem_map))
|
|
# define pfn_to_page(pfn) (vmem_map + (pfn))
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(CONFIG_FLATMEM) || defined(CONFIG_SPARSEMEM)
|
|
/* FLATMEM always configures mem_map (mem_map = vmem_map if necessary) */
|
|
#include <asm-generic/memory_model.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_FLATMEM
|
|
# define pfn_valid(pfn) (((pfn) < max_mapnr) && ia64_pfn_valid(pfn))
|
|
#elif defined(CONFIG_DISCONTIGMEM)
|
|
extern unsigned long min_low_pfn;
|
|
extern unsigned long max_low_pfn;
|
|
# define pfn_valid(pfn) (((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn) && ia64_pfn_valid(pfn))
|
|
#endif
|
|
|
|
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
|
|
typedef union ia64_va {
|
|
struct {
|
|
unsigned long off : 61; /* intra-region offset */
|
|
unsigned long reg : 3; /* region number */
|
|
} f;
|
|
unsigned long l;
|
|
void *p;
|
|
} ia64_va;
|
|
|
|
/*
|
|
* Note: These macros depend on the fact that PAGE_OFFSET has all
|
|
* region bits set to 1 and all other bits set to zero. They are
|
|
* expressed in this way to ensure they result in a single "dep"
|
|
* instruction.
|
|
*/
|
|
#define __pa(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg = 0; _v.l;})
|
|
#define __va(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg = -1; _v.p;})
|
|
|
|
#define REGION_NUMBER(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg;})
|
|
#define REGION_OFFSET(x) ({ia64_va _v; _v.l = (long) (x); _v.f.off;})
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
# define htlbpage_to_page(x) (((unsigned long) REGION_NUMBER(x) << 61) \
|
|
| (REGION_OFFSET(x) >> (HPAGE_SHIFT-PAGE_SHIFT)))
|
|
# define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
# define is_hugepage_only_range(mm, addr, len) \
|
|
(REGION_NUMBER(addr) == RGN_HPAGE || \
|
|
REGION_NUMBER((addr)+(len)-1) == RGN_HPAGE)
|
|
extern unsigned int hpage_shift;
|
|
#endif
|
|
|
|
static __inline__ int
|
|
get_order (unsigned long size)
|
|
{
|
|
long double d = size - 1;
|
|
long order;
|
|
|
|
order = ia64_getf_exp(d);
|
|
order = order - PAGE_SHIFT - 0xffff + 1;
|
|
if (order < 0)
|
|
order = 0;
|
|
return order;
|
|
}
|
|
|
|
# endif /* __KERNEL__ */
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#ifdef STRICT_MM_TYPECHECKS
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
typedef struct { unsigned long pmd; } pmd_t;
|
|
#ifdef CONFIG_PGTABLE_4
|
|
typedef struct { unsigned long pud; } pud_t;
|
|
#endif
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
# define pte_val(x) ((x).pte)
|
|
# define pmd_val(x) ((x).pmd)
|
|
#ifdef CONFIG_PGTABLE_4
|
|
# define pud_val(x) ((x).pud)
|
|
#endif
|
|
# define pgd_val(x) ((x).pgd)
|
|
# define pgprot_val(x) ((x).pgprot)
|
|
|
|
# define __pte(x) ((pte_t) { (x) } )
|
|
# define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
#else /* !STRICT_MM_TYPECHECKS */
|
|
/*
|
|
* .. while these make it easier on the compiler
|
|
*/
|
|
# ifndef __ASSEMBLY__
|
|
typedef unsigned long pte_t;
|
|
typedef unsigned long pmd_t;
|
|
typedef unsigned long pgd_t;
|
|
typedef unsigned long pgprot_t;
|
|
# endif
|
|
|
|
# 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 __pgd(x) (x)
|
|
# define __pgprot(x) (x)
|
|
#endif /* !STRICT_MM_TYPECHECKS */
|
|
|
|
#define PAGE_OFFSET RGN_BASE(RGN_KERNEL)
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC | \
|
|
(((current->personality & READ_IMPLIES_EXEC) != 0) \
|
|
? VM_EXEC : 0))
|
|
|
|
#endif /* _ASM_IA64_PAGE_H */
|