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.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/const.hvdso/page.hasm-generic/memory_model.hasm-generic/getorder.h
Detected Declarations
struct pt_regsstruct pagestruct vm_area_struct
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
- Immediate include surface: `linux/const.h`, `vdso/page.h`, `asm-generic/memory_model.h`, `asm-generic/getorder.h`.
- Detected declarations: `struct pt_regs`, `struct page`, `struct vm_area_struct`.
- Atlas domain: Architecture Layer / arch/sparc.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.