arch/arc/include/asm/cacheflush.h
Source file repositories/reference/linux-study-clean/arch/arc/include/asm/cacheflush.h
File Facts
- System
- Linux kernel
- Corpus path
arch/arc/include/asm/cacheflush.h- Extension
.h- Size
- 2432 bytes
- Lines
- 70
- Domain
- Architecture Layer
- Bucket
- arch/arc
- 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.
- Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/mm.hasm/shmparam.h
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
#ifndef _ASM_CACHEFLUSH_H
#define _ASM_CACHEFLUSH_H
#include <linux/mm.h>
#include <asm/shmparam.h>
void flush_cache_all(void);
void flush_icache_range(unsigned long kstart, unsigned long kend);
void __sync_icache_dcache(phys_addr_t paddr, unsigned long vaddr, int len);
void __inv_icache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr);
void __flush_dcache_pages(phys_addr_t paddr, unsigned long vaddr, unsigned nr);
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
void flush_dcache_page(struct page *page);
void flush_dcache_folio(struct folio *folio);
#define flush_dcache_folio flush_dcache_folio
void dma_cache_wback_inv(phys_addr_t start, unsigned long sz);
void dma_cache_inv(phys_addr_t start, unsigned long sz);
void dma_cache_wback(phys_addr_t start, unsigned long sz);
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
/* TBD: optimize this */
#define flush_cache_vmap(start, end) flush_cache_all()
#define flush_cache_vmap_early(start, end) do { } while (0)
#define flush_cache_vunmap(start, end) flush_cache_all()
#define flush_cache_dup_mm(mm) /* called on fork (VIVT only) */
#define flush_cache_mm(mm) /* called on munmap/exit */
#define flush_cache_range(mm, u_vstart, u_vend)
#define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */
/*
* A new pagecache page has PG_arch_1 clear - thus dcache dirty by default
* This works around some PIO based drivers which don't call flush_dcache_page
* to record that they dirtied the dcache
*/
#define PG_dc_clean PG_arch_1
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
memcpy(dst, src, len); \
if (vma->vm_flags & VM_EXEC) \
__sync_icache_dcache((unsigned long)(dst), vaddr, len); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
memcpy(dst, src, len); \
#endif
Annotation
- Immediate include surface: `linux/mm.h`, `asm/shmparam.h`.
- Atlas domain: Architecture Layer / arch/arc.
- Implementation status: source implementation candidate.
- This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
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.