arch/arm/include/asm/page.h

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

File Facts

System
Linux kernel
Corpus path
arch/arm/include/asm/page.h
Extension
.h
Size
4800 bytes
Lines
193
Domain
Architecture Layer
Bucket
arch/arm
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

struct cpu_user_fns {
	void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr);
	void (*cpu_copy_user_highpage)(struct page *to, struct page *from,
			unsigned long vaddr, struct vm_area_struct *vma);
};

void fa_copy_user_highpage(struct page *to, struct page *from,
	unsigned long vaddr, struct vm_area_struct *vma);
void fa_clear_user_highpage(struct page *page, unsigned long vaddr);
void feroceon_copy_user_highpage(struct page *to, struct page *from,
	unsigned long vaddr, struct vm_area_struct *vma);
void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr);
void v4_mc_copy_user_highpage(struct page *to, struct page *from,
	unsigned long vaddr, struct vm_area_struct *vma);
void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
void v4wb_copy_user_highpage(struct page *to, struct page *from,
	unsigned long vaddr, struct vm_area_struct *vma);
void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr);
void v4wt_copy_user_highpage(struct page *to, struct page *from,
	unsigned long vaddr, struct vm_area_struct *vma);
void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr);
void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
	unsigned long vaddr, struct vm_area_struct *vma);
void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
void xscale_mc_copy_user_highpage(struct page *to, struct page *from,
	unsigned long vaddr, struct vm_area_struct *vma);
void xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr);

#ifdef MULTI_USER
extern struct cpu_user_fns cpu_user;

#define __cpu_clear_user_highpage	cpu_user.cpu_clear_user_highpage
#define __cpu_copy_user_highpage	cpu_user.cpu_copy_user_highpage

#else

#define __cpu_clear_user_highpage	__glue(_USER,_clear_user_highpage)
#define __cpu_copy_user_highpage	__glue(_USER,_copy_user_highpage)

extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
			unsigned long vaddr, struct vm_area_struct *vma);
#endif

#define clear_user_highpage(page,vaddr)		\
	 __cpu_clear_user_highpage(page, vaddr)

#define __HAVE_ARCH_COPY_USER_HIGHPAGE
#define copy_user_highpage(to,from,vaddr,vma)	\
	__cpu_copy_user_highpage(to, from, vaddr, vma)

#define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
extern void copy_page(void *to, const void *from);

#ifdef CONFIG_KUSER_HELPERS
#define __HAVE_ARCH_GATE_AREA 1
#endif

#ifdef CONFIG_ARM_LPAE
#include <asm/pgtable-3level-types.h>
#else
#include <asm/pgtable-2level-types.h>
#ifdef CONFIG_VMAP_STACK
#define ARCH_PAGE_TABLE_SYNC_MASK	PGTBL_PMD_MODIFIED
#endif
#endif

#endif /* CONFIG_MMU */

typedef struct page *pgtable_t;

#ifdef CONFIG_HAVE_ARCH_PFN_VALID
extern int pfn_valid(unsigned long);
#define pfn_valid pfn_valid
#endif

#endif /* !__ASSEMBLY__ */

#include <asm/memory.h>

#define VMA_DATA_DEFAULT_FLAGS	VMA_DATA_FLAGS_TSK_EXEC

#include <asm-generic/getorder.h>
#include <asm-generic/memory_model.h>

#endif

Annotation

Implementation Notes