1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5 #ifndef _ASM_REGDEF_H 6 #define _ASM_REGDEF_H 7 8 #define zero $r0 /* wired zero */ 9 #define ra $r1 /* return address */ 10 #define tp $r2 11 #define sp $r3 /* stack pointer */ 12 #define a0 $r4 /* argument registers, a0/a1 reused as v0/v1 for return value */ 13 #define a1 $r5 14 #define a2 $r6 15 #define a3 $r7 16 #define a4 $r8 17 #define a5 $r9 18 #define a6 $r10 19 #define a7 $r11 20 #define t0 $r12 /* caller saved */ 21 #define t1 $r13 22 #define t2 $r14 23 #define t3 $r15 24 #define t4 $r16 25 #define t5 $r17 26 #define t6 $r18 27 #define t7 $r19 28 #define t8 $r20 29 #define u0 $r21 30 #define fp $r22 /* frame pointer */ 31 #define s0 $r23 /* callee saved */ 32 #define s1 $r24 33 #define s2 $r25 34 #define s3 $r26 35 #define s4 $r27 36 #define s5 $r28 37 #define s6 $r29 38 #define s7 $r30 39 #define s8 $r31 40 41 #endif /* _ASM_REGDEF_H */ 42