arch/arc/include/asm/linkage.h

Source file repositories/reference/linux-study-clean/arch/arc/include/asm/linkage.h

File Facts

System
Linux kernel
Corpus path
arch/arc/include/asm/linkage.h
Extension
.h
Size
1487 bytes
Lines
81
Domain
Architecture Layer
Bucket
arch/arc
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_LINKAGE_H
#define __ASM_LINKAGE_H

#include <asm/dwarf.h>

#define ASM_NL		 `	/* use '`' to mark new line in macro */
#define __ALIGN		.align 4
#define __ALIGN_STR	__stringify(__ALIGN)

#ifdef __ASSEMBLER__

.macro ST2 e, o, off
#ifdef CONFIG_ARC_HAS_LL64
	std	\e, [sp, \off]
#else
	st	\e, [sp, \off]
	st	\o, [sp, \off+4]
#endif
.endm

.macro LD2 e, o, off
#ifdef CONFIG_ARC_HAS_LL64
	ldd	\e, [sp, \off]
#else
	ld	\e, [sp, \off]
	ld	\o, [sp, \off+4]
#endif
.endm

/* annotation for data we want in DCCM - if enabled in .config */
.macro ARCFP_DATA nm
#ifdef CONFIG_ARC_HAS_DCCM
	.section .data.arcfp
#else
	.section .data
#endif
	.global \nm
.endm

/* annotation for data we want in DCCM - if enabled in .config */
.macro ARCFP_CODE
#ifdef CONFIG_ARC_HAS_ICCM
	.section .text.arcfp, "ax",@progbits
#else
	.section .text, "ax",@progbits
#endif
.endm

#define ENTRY_CFI(name)		\
	.globl name ASM_NL	\
	ALIGN ASM_NL 		\
	name: ASM_NL		\
	CFI_STARTPROC ASM_NL

#define END_CFI(name) 		\
	CFI_ENDPROC ASM_NL	\
	.size name, .-name

#else	/* !__ASSEMBLER__ */

#ifdef CONFIG_ARC_HAS_ICCM
#define __arcfp_code __section(".text.arcfp")
#else
#define __arcfp_code __section(".text")
#endif

#ifdef CONFIG_ARC_HAS_DCCM
#define __arcfp_data __section(".data.arcfp")
#else
#define __arcfp_data __section(".data")
#endif

#endif /* __ASSEMBLER__ */

#endif

Annotation

Implementation Notes