arch/riscv/include/uapi/asm/hwcap.h

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

File Facts

System
Linux kernel
Corpus path
arch/riscv/include/uapi/asm/hwcap.h
Extension
.h
Size
973 bytes
Lines
27
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 _UAPI_ASM_RISCV_HWCAP_H
#define _UAPI_ASM_RISCV_HWCAP_H

/*
 * Linux saves the floating-point registers according to the ISA Linux is
 * executing on, as opposed to the ISA the user program is compiled for.  This
 * is necessary for a handful of esoteric use cases: for example, userspace
 * threading libraries must be able to examine the actual machine state in
 * order to fully reconstruct the state of a thread.
 */
#define COMPAT_HWCAP_ISA_I	(1 << ('I' - 'A'))
#define COMPAT_HWCAP_ISA_M	(1 << ('M' - 'A'))
#define COMPAT_HWCAP_ISA_A	(1 << ('A' - 'A'))
#define COMPAT_HWCAP_ISA_F	(1 << ('F' - 'A'))
#define COMPAT_HWCAP_ISA_D	(1 << ('D' - 'A'))
#define COMPAT_HWCAP_ISA_C	(1 << ('C' - 'A'))
#define COMPAT_HWCAP_ISA_V	(1 << ('V' - 'A'))

#endif /* _UAPI_ASM_RISCV_HWCAP_H */

Annotation

Implementation Notes