arch/riscv/include/asm/cache.h

Source file repositories/reference/linux-study-clean/arch/riscv/include/asm/cache.h

File Facts

System
Linux kernel
Corpus path
arch/riscv/include/asm/cache.h
Extension
.h
Size
899 bytes
Lines
41
Domain
Architecture Layer
Bucket
arch/riscv
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

#ifndef _ASM_RISCV_CACHE_H
#define _ASM_RISCV_CACHE_H

#define L1_CACHE_SHIFT		6

#define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)

#ifdef CONFIG_RISCV_DMA_NONCOHERENT
#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
#define ARCH_KMALLOC_MINALIGN	(8)
#endif

/*
 * RISC-V requires the stack pointer to be 16-byte aligned, so ensure that
 * the flat loader aligns it accordingly.
 */
#ifndef CONFIG_MMU
#define ARCH_SLAB_MINALIGN	16
#endif

#ifndef __ASSEMBLER__

extern int dma_cache_alignment;
#ifdef CONFIG_RISCV_DMA_NONCOHERENT
#define dma_get_cache_alignment dma_get_cache_alignment
static inline int dma_get_cache_alignment(void)
{
	return dma_cache_alignment;
}
#endif

#endif	/* __ASSEMBLER__ */

#endif /* _ASM_RISCV_CACHE_H */

Annotation

Implementation Notes