arch/parisc/include/asm/page.h

Source file repositories/reference/linux-study-clean/arch/parisc/include/asm/page.h

File Facts

System
Linux kernel
Corpus path
arch/parisc/include/asm/page.h
Extension
.h
Size
5154 bytes
Lines
180
Domain
Architecture Layer
Bucket
arch/parisc
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 _PARISC_PAGE_H
#define _PARISC_PAGE_H

#include <linux/const.h>

#include <vdso/page.h>

#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA

#ifndef __ASSEMBLER__

#include <asm/types.h>
#include <asm/cache.h>

#define clear_page(page)	clear_page_asm((void *)(page))
#define copy_page(to, from)	copy_page_asm((void *)(to), (void *)(from))

struct page;
struct vm_area_struct;

void clear_page_asm(void *page);
void copy_page_asm(void *to, void *from);
void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr,
		struct vm_area_struct *vma);
#define __HAVE_ARCH_COPY_USER_HIGHPAGE

/*
 * These are used to make use of C type-checking..
 */
#define STRICT_MM_TYPECHECKS
#ifdef STRICT_MM_TYPECHECKS
typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */

/* NOTE: even on 64 bits, these entries are __u32 because we allocate
 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
typedef struct { __u32 pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;

#if CONFIG_PGTABLE_LEVELS == 3
typedef struct { __u32 pmd; } pmd_t;
#define __pmd(x)	((pmd_t) { (x) } )
/* pXd_val() do not work as lvalues, so make sure we don't use them as such. */
#define pmd_val(x)	((x).pmd + 0)
#endif

#define pte_val(x)	((x).pte)
#define pgd_val(x)	((x).pgd + 0)
#define pgprot_val(x)	((x).pgprot)

#define __pte(x)	((pte_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;

#if CONFIG_PGTABLE_LEVELS == 3
typedef         __u32 pmd_t;
#define pmd_val(x)      (x)
#define __pmd(x)	(x)
#endif

typedef         __u32 pgd_t;
typedef unsigned long pgprot_t;

#define pte_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 set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
#if CONFIG_PGTABLE_LEVELS == 3
#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
#endif

typedef struct page *pgtable_t;

typedef struct __physmem_range {
	unsigned long start_pfn;
	unsigned long pages;       /* PAGE_SIZE pages */
} physmem_range_t;

Annotation

Implementation Notes