arch/sparc/include/asm/page_64.h

Source file repositories/reference/linux-study-clean/arch/sparc/include/asm/page_64.h

File Facts

System
Linux kernel
Corpus path
arch/sparc/include/asm/page_64.h
Extension
.h
Size
4710 bytes
Lines
162
Domain
Architecture Layer
Bucket
arch/sparc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _SPARC64_PAGE_H
#define _SPARC64_PAGE_H

#include <linux/const.h>

#include <vdso/page.h>

/* Flushing for D-cache alias handling is only needed if
 * the page size is smaller than 16K.
 */
#if PAGE_SHIFT < 14
#define DCACHE_ALIASING_POSSIBLE
#endif

#define HPAGE_SHIFT		23
#define REAL_HPAGE_SHIFT	22
#define HPAGE_16GB_SHIFT	34
#define HPAGE_2GB_SHIFT		31
#define HPAGE_256MB_SHIFT	28
#define HPAGE_64K_SHIFT		16
#define REAL_HPAGE_SIZE		(_AC(1,UL) << REAL_HPAGE_SHIFT)

#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
#define HPAGE_SIZE		(_AC(1,UL) << HPAGE_SHIFT)
#define HPAGE_MASK		(~(HPAGE_SIZE - 1UL))
#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
#define REAL_HPAGE_PER_HPAGE	(_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
#define HUGE_MAX_HSTATE		5
#endif

#ifndef __ASSEMBLER__

#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
struct pt_regs;
void hugetlb_setup(struct pt_regs *regs);
#endif

#define WANT_PAGE_VIRTUAL

void _clear_page(void *page);
#define clear_page(X)	_clear_page((void *)(X))
struct page;
void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
#define clear_user_page clear_user_page
#define copy_page(X,Y)	memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
struct vm_area_struct;
void copy_user_highpage(struct page *to, struct page *from,
			unsigned long vaddr, struct vm_area_struct *vma);
#define __HAVE_ARCH_COPY_HIGHPAGE
void copy_highpage(struct page *to, struct page *from);

/* Unlike sparc32, sparc64's parameter passing API is more
 * sane in that structures which as small enough are passed
 * in registers instead of on the stack.  Thus, setting
 * STRICT_MM_TYPECHECKS does not generate worse code so
 * let's enable it to get the type checking.
 */

#define STRICT_MM_TYPECHECKS

#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 iopte; } iopte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pud; } pud_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;

#define pte_val(x)	((x).pte)
#define iopte_val(x)	((x).iopte)
#define pmd_val(x)      ((x).pmd)
#define pud_val(x)      ((x).pud)
#define pgd_val(x)	((x).pgd)
#define pgprot_val(x)	((x).pgprot)

#define __pte(x)	((pte_t) { (x) } )
#define __iopte(x)	((iopte_t) { (x) } )
#define __pmd(x)        ((pmd_t) { (x) } )
#define __pud(x)        ((pud_t) { (x) } )
#define __pgd(x)	((pgd_t) { (x) } )
#define __pgprot(x)	((pgprot_t) { (x) } )

#else
/* .. while these make it easier on the compiler */
typedef unsigned long pte_t;
typedef unsigned long iopte_t;

Annotation

Implementation Notes