arch/sparc/include/asm/cacheflush_32.h
Source file repositories/reference/linux-study-clean/arch/sparc/include/asm/cacheflush_32.h
File Facts
- System
- Linux kernel
- Corpus path
arch/sparc/include/asm/cacheflush_32.h- Extension
.h- Size
- 2142 bytes
- Lines
- 64
- 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.
- Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/page-flags.hasm/cachetlb_32.h
Detected Declarations
function flush_dcache_page
Annotated Snippet
#ifndef _SPARC_CACHEFLUSH_H
#define _SPARC_CACHEFLUSH_H
#include <linux/page-flags.h>
#include <asm/cachetlb_32.h>
#define flush_cache_all() \
sparc32_cachetlb_ops->cache_all()
#define flush_cache_mm(mm) \
sparc32_cachetlb_ops->cache_mm(mm)
#define flush_cache_dup_mm(mm) \
sparc32_cachetlb_ops->cache_mm(mm)
#define flush_cache_range(vma,start,end) \
sparc32_cachetlb_ops->cache_range(vma, start, end)
#define flush_cache_page(vma,addr,pfn) \
sparc32_cachetlb_ops->cache_page(vma, addr)
#define flush_icache_range(start, end) do { } while (0)
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
flush_cache_page(vma, vaddr, page_to_pfn(page));\
memcpy(dst, src, len); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
do { \
flush_cache_page(vma, vaddr, page_to_pfn(page));\
memcpy(dst, src, len); \
} while (0)
#define __flush_page_to_ram(addr) \
sparc32_cachetlb_ops->page_to_ram(addr)
#define flush_sig_insns(mm,insn_addr) \
sparc32_cachetlb_ops->sig_insns(mm, insn_addr)
#define flush_page_for_dma(addr) \
sparc32_cachetlb_ops->page_for_dma(addr)
void sparc_flush_page_to_ram(struct page *page);
void sparc_flush_folio_to_ram(struct folio *folio);
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
#define flush_dcache_folio(folio) sparc_flush_folio_to_ram(folio)
static inline void flush_dcache_page(struct page *page)
{
flush_dcache_folio(page_folio(page));
}
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#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()
/* When a context switch happens we must flush all user windows so that
* the windows of the current process are flushed onto its stack. This
* way the windows are all clean for the next process and the stack
* frames are up to date.
*/
void flush_user_windows(void);
void kill_user_windows(void);
void flushw_all(void);
#endif /* _SPARC_CACHEFLUSH_H */
Annotation
- Immediate include surface: `linux/page-flags.h`, `asm/cachetlb_32.h`.
- Detected declarations: `function flush_dcache_page`.
- Atlas domain: Architecture Layer / arch/sparc.
- 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.