arch/alpha/include/asm/special_insns.h

Source file repositories/reference/linux-study-clean/arch/alpha/include/asm/special_insns.h

File Facts

System
Linux kernel
Corpus path
arch/alpha/include/asm/special_insns.h
Extension
.h
Size
865 bytes
Lines
40
Domain
Architecture Layer
Bucket
arch/alpha
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 __ALPHA_SPECIAL_INSNS_H
#define __ALPHA_SPECIAL_INSNS_H

enum implver_enum {
	IMPLVER_EV4,
	IMPLVER_EV5,
	IMPLVER_EV6
};

#ifdef CONFIG_ALPHA_GENERIC
#define implver()				\
({ unsigned long __implver;			\
   __asm__ ("implver %0" : "=r"(__implver));	\
   (enum implver_enum) __implver; })
#else
/* Try to eliminate some dead code.  */
#ifdef CONFIG_ALPHA_EV56
#define implver() IMPLVER_EV5
#endif
#if defined(CONFIG_ALPHA_EV6)
#define implver() IMPLVER_EV6
#endif
#endif

enum amask_enum {
	AMASK_BWX = (1UL << 0),
	AMASK_FIX = (1UL << 1),
	AMASK_CIX = (1UL << 2),
	AMASK_MAX = (1UL << 8),
	AMASK_PRECISE_TRAP = (1UL << 9),
};

#define amask(mask)						\
({ unsigned long __amask, __input = (mask);			\
   __asm__ ("amask %1,%0" : "=r"(__amask) : "rI"(__input));	\
   __amask; })

#endif /* __ALPHA_SPECIAL_INSNS_H */

Annotation

Implementation Notes