arch/mips/include/asm/regdef.h

Source file repositories/reference/linux-study-clean/arch/mips/include/asm/regdef.h

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/regdef.h
Extension
.h
Size
5069 bytes
Lines
198
Domain
Architecture Layer
Bucket
arch/mips
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_REGDEF_H
#define _ASM_REGDEF_H

#include <asm/sgidefs.h>

#if _MIPS_SIM == _MIPS_SIM_ABI32

/*
 * General purpose register numbers for 32 bit ABI
 */
#define GPR_ZERO	0	/* wired zero */
#define GPR_AT	1	/* assembler temp */
#define GPR_V0	2	/* return value */
#define GPR_V1	3
#define GPR_A0	4	/* argument registers */
#define GPR_A1	5
#define GPR_A2	6
#define GPR_A3	7
#define GPR_T0	8	/* caller saved */
#define GPR_T1	9
#define GPR_T2	10
#define GPR_T3	11
#define GPR_T4	12
#define GPR_TA0	12
#define GPR_T5	13
#define GPR_TA1	13
#define GPR_T6	14
#define GPR_TA2	14
#define GPR_T7	15
#define GPR_TA3	15
#define GPR_S0	16	/* callee saved */
#define GPR_S1	17
#define GPR_S2	18
#define GPR_S3	19
#define GPR_S4	20
#define GPR_S5	21
#define GPR_S6	22
#define GPR_S7	23
#define GPR_T8	24	/* caller saved */
#define GPR_T9	25
#define GPR_JP	25	/* PIC jump register */
#define GPR_K0	26	/* kernel scratch */
#define GPR_K1	27
#define GPR_GP	28	/* global pointer */
#define GPR_SP	29	/* stack pointer */
#define GPR_FP	30	/* frame pointer */
#define GPR_S8	30	/* same like fp! */
#define GPR_RA	31	/* return address */

#endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */

#if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32

#define GPR_ZERO	0	/* wired zero */
#define GPR_AT	1	/* assembler temp */
#define GPR_V0	2	/* return value - caller saved */
#define GPR_V1	3
#define GPR_A0	4	/* argument registers */
#define GPR_A1	5
#define GPR_A2	6
#define GPR_A3	7
#define GPR_A4	8	/* arg reg 64 bit; caller saved in 32 bit */
#define GPR_TA0	8
#define GPR_A5	9
#define GPR_TA1	9
#define GPR_A6	10
#define GPR_TA2	10
#define GPR_A7	11
#define GPR_TA3	11
#define GPR_T0	12	/* caller saved */
#define GPR_T1	13
#define GPR_T2	14
#define GPR_T3	15
#define GPR_S0	16	/* callee saved */
#define GPR_S1	17
#define GPR_S2	18
#define GPR_S3	19
#define GPR_S4	20
#define GPR_S5	21
#define GPR_S6	22
#define GPR_S7	23
#define GPR_T8	24	/* caller saved */
#define GPR_T9	25	/* callee address for PIC/temp */
#define GPR_JP	25	/* PIC jump register */
#define GPR_K0	26	/* kernel temporary */
#define GPR_K1	27
#define GPR_GP	28	/* global pointer - caller saved for PIC */
#define GPR_SP	29	/* stack pointer */
#define GPR_FP	30	/* frame pointer */
#define GPR_S8	30	/* callee saved */

Annotation

Implementation Notes