arch/arm/mm/cache.c

Source file repositories/reference/linux-study-clean/arch/arm/mm/cache.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mm/cache.c
Extension
.c
Size
28007 bytes
Lines
664
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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * This file defines C prototypes for the low-level cache assembly functions
 * and populates a vtable for each selected ARM CPU cache type.
 */

#include <linux/types.h>
#include <asm/cacheflush.h>

#ifdef CONFIG_CPU_CACHE_V4
void v4_flush_icache_all(void);
void v4_flush_kern_cache_all(void);
void v4_flush_user_cache_all(void);
void v4_flush_user_cache_range(unsigned long, unsigned long, unsigned int);
void v4_coherent_kern_range(unsigned long, unsigned long);
int v4_coherent_user_range(unsigned long, unsigned long);
void v4_flush_kern_dcache_area(void *, size_t);
void v4_dma_map_area(const void *, size_t, int);
void v4_dma_unmap_area(const void *, size_t, int);
void v4_dma_flush_range(const void *, const void *);

struct cpu_cache_fns v4_cache_fns __initconst = {
	.flush_icache_all = v4_flush_icache_all,
	.flush_kern_all = v4_flush_kern_cache_all,
	.flush_kern_louis = v4_flush_kern_cache_all,
	.flush_user_all = v4_flush_user_cache_all,
	.flush_user_range = v4_flush_user_cache_range,
	.coherent_kern_range = v4_coherent_kern_range,
	.coherent_user_range = v4_coherent_user_range,
	.flush_kern_dcache_area = v4_flush_kern_dcache_area,
	.dma_map_area = v4_dma_map_area,
	.dma_unmap_area = v4_dma_unmap_area,
	.dma_flush_range = v4_dma_flush_range,
};
#endif

/* V4 write-back cache "V4WB" */
#ifdef CONFIG_CPU_CACHE_V4WB
void v4wb_flush_icache_all(void);
void v4wb_flush_kern_cache_all(void);
void v4wb_flush_user_cache_all(void);
void v4wb_flush_user_cache_range(unsigned long, unsigned long, unsigned int);
void v4wb_coherent_kern_range(unsigned long, unsigned long);
int v4wb_coherent_user_range(unsigned long, unsigned long);
void v4wb_flush_kern_dcache_area(void *, size_t);
void v4wb_dma_map_area(const void *, size_t, int);
void v4wb_dma_unmap_area(const void *, size_t, int);
void v4wb_dma_flush_range(const void *, const void *);

struct cpu_cache_fns v4wb_cache_fns __initconst = {
	.flush_icache_all = v4wb_flush_icache_all,
	.flush_kern_all = v4wb_flush_kern_cache_all,
	.flush_kern_louis = v4wb_flush_kern_cache_all,
	.flush_user_all = v4wb_flush_user_cache_all,
	.flush_user_range = v4wb_flush_user_cache_range,
	.coherent_kern_range = v4wb_coherent_kern_range,
	.coherent_user_range = v4wb_coherent_user_range,
	.flush_kern_dcache_area = v4wb_flush_kern_dcache_area,
	.dma_map_area = v4wb_dma_map_area,
	.dma_unmap_area = v4wb_dma_unmap_area,
	.dma_flush_range = v4wb_dma_flush_range,
};
#endif

/* V4 write-through cache "V4WT" */
#ifdef CONFIG_CPU_CACHE_V4WT
void v4wt_flush_icache_all(void);
void v4wt_flush_kern_cache_all(void);
void v4wt_flush_user_cache_all(void);
void v4wt_flush_user_cache_range(unsigned long, unsigned long, unsigned int);
void v4wt_coherent_kern_range(unsigned long, unsigned long);
int v4wt_coherent_user_range(unsigned long, unsigned long);
void v4wt_flush_kern_dcache_area(void *, size_t);
void v4wt_dma_map_area(const void *, size_t, int);
void v4wt_dma_unmap_area(const void *, size_t, int);
void v4wt_dma_flush_range(const void *, const void *);

struct cpu_cache_fns v4wt_cache_fns __initconst = {
	.flush_icache_all = v4wt_flush_icache_all,
	.flush_kern_all = v4wt_flush_kern_cache_all,
	.flush_kern_louis = v4wt_flush_kern_cache_all,
	.flush_user_all = v4wt_flush_user_cache_all,
	.flush_user_range = v4wt_flush_user_cache_range,
	.coherent_kern_range = v4wt_coherent_kern_range,
	.coherent_user_range = v4wt_coherent_user_range,
	.flush_kern_dcache_area = v4wt_flush_kern_dcache_area,
	.dma_map_area = v4wt_dma_map_area,
	.dma_unmap_area = v4wt_dma_unmap_area,
	.dma_flush_range = v4wt_dma_flush_range,
};

Annotation

Implementation Notes