arch/microblaze/include/asm/cacheflush.h
Source file repositories/reference/linux-study-clean/arch/microblaze/include/asm/cacheflush.h
File Facts
- System
- Linux kernel
- Corpus path
arch/microblaze/include/asm/cacheflush.h- Extension
.h- Size
- 3427 bytes
- Lines
- 104
- Domain
- Architecture Layer
- Bucket
- arch/microblaze
- 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/mm.hlinux/io.hasm-generic/cacheflush.h
Detected Declarations
struct scachefunction flush_dcache_foliofunction copy_to_user_page
Annotated Snippet
struct scache {
/* icache */
void (*ie)(void); /* enable */
void (*id)(void); /* disable */
void (*ifl)(void); /* flush */
void (*iflr)(unsigned long a, unsigned long b);
void (*iin)(void); /* invalidate */
void (*iinr)(unsigned long a, unsigned long b);
/* dcache */
void (*de)(void); /* enable */
void (*dd)(void); /* disable */
void (*dfl)(void); /* flush */
void (*dflr)(unsigned long a, unsigned long b);
void (*din)(void); /* invalidate */
void (*dinr)(unsigned long a, unsigned long b);
};
/* microblaze cache */
extern struct scache *mbc;
void microblaze_cache_init(void);
#define enable_icache() mbc->ie();
#define disable_icache() mbc->id();
#define flush_icache() mbc->ifl();
#define flush_icache_range(start, end) mbc->iflr(start, end);
#define invalidate_icache() mbc->iin();
#define invalidate_icache_range(start, end) mbc->iinr(start, end);
#define enable_dcache() mbc->de();
#define disable_dcache() mbc->dd();
/* FIXME for LL-temac driver */
#define invalidate_dcache() mbc->din();
#define invalidate_dcache_range(start, end) mbc->dinr(start, end);
#define flush_dcache() mbc->dfl();
#define flush_dcache_range(start, end) mbc->dflr(start, end);
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
/* MS: We have to implement it because of rootfs-jffs2 issue on WB */
#define flush_dcache_page(page) \
do { \
unsigned long addr = (unsigned long) page_address(page); /* virtual */ \
addr = (u32)virt_to_phys((void *)addr); \
flush_dcache_range((unsigned) (addr), (unsigned) (addr) + PAGE_SIZE); \
} while (0);
static inline void flush_dcache_folio(struct folio *folio)
{
unsigned long addr = folio_pfn(folio) << PAGE_SHIFT;
flush_dcache_range(addr, addr + folio_size(folio));
}
#define flush_dcache_folio flush_dcache_folio
#define flush_cache_page(vma, vmaddr, pfn) \
flush_dcache_range(pfn << PAGE_SHIFT, (pfn << PAGE_SHIFT) + PAGE_SIZE);
static inline void copy_to_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr,
void *dst, void *src, int len)
{
u32 addr = virt_to_phys(dst);
memcpy(dst, src, len);
if (vma->vm_flags & VM_EXEC) {
invalidate_icache_range(addr, addr + PAGE_SIZE);
flush_dcache_range(addr, addr + PAGE_SIZE);
}
}
#define copy_to_user_page copy_to_user_page
#include <asm-generic/cacheflush.h>
#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */
Annotation
- Immediate include surface: `linux/mm.h`, `linux/io.h`, `asm-generic/cacheflush.h`.
- Detected declarations: `struct scache`, `function flush_dcache_folio`, `function copy_to_user_page`.
- Atlas domain: Architecture Layer / arch/microblaze.
- 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.