arch/powerpc/include/asm/fpu.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/asm/fpu.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/asm/fpu.h
Extension
.h
Size
509 bytes
Lines
29
Domain
Architecture Layer
Bucket
arch/powerpc
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_POWERPC_FPU_H
#define _ASM_POWERPC_FPU_H

#include <linux/preempt.h>

#include <asm/cpu_has_feature.h>
#include <asm/switch_to.h>

#define kernel_fpu_available()	(!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE))

static inline void kernel_fpu_begin(void)
{
	preempt_disable();
	enable_kernel_fp();
}

static inline void kernel_fpu_end(void)
{
	disable_kernel_fp();
	preempt_enable();
}

#endif /* ! _ASM_POWERPC_FPU_H */

Annotation

Implementation Notes