arch/sh/include/uapi/asm/cpu-features.h

Source file repositories/reference/linux-study-clean/arch/sh/include/uapi/asm/cpu-features.h

File Facts

System
Linux kernel
Corpus path
arch/sh/include/uapi/asm/cpu-features.h
Extension
.h
Size
1155 bytes
Lines
29
Domain
Architecture Layer
Bucket
arch/sh
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_SH_CPU_FEATURES_H
#define __ASM_SH_CPU_FEATURES_H

/*
 * Processor flags
 *
 * Note: When adding a new flag, keep cpu_flags[] in
 * arch/sh/kernel/setup.c in sync so symbolic name
 * mapping of the processor flags has a chance of being
 * reasonably accurate.
 *
 * These flags are also available through the ELF
 * auxiliary vector as AT_HWCAP.
 */
#define CPU_HAS_FPU		0x0001	/* Hardware FPU support */
#define CPU_HAS_P2_FLUSH_BUG	0x0002	/* Need to flush the cache in P2 area */
#define CPU_HAS_MMU_PAGE_ASSOC	0x0004	/* SH3: TLB way selection bit support */
#define CPU_HAS_DSP		0x0008	/* SH-DSP: DSP support */
#define CPU_HAS_PERF_COUNTER	0x0010	/* Hardware performance counters */
#define CPU_HAS_PTEA		0x0020	/* PTEA register */
#define CPU_HAS_LLSC		0x0040	/* movli.l/movco.l */
#define CPU_HAS_L2_CACHE	0x0080	/* Secondary cache / URAM */
#define CPU_HAS_OP32		0x0100	/* 32-bit instruction support */
#define CPU_HAS_PTEAEX		0x0200	/* PTE ASID Extension support */
#define CPU_HAS_CAS_L		0x0400	/* cas.l atomic compare-and-swap */

#endif /* __ASM_SH_CPU_FEATURES_H */

Annotation

Implementation Notes