asm.h revision 1.9
1 /* $NetBSD: asm.h,v 1.9 2025/01/04 21:02:01 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _RISCV_ASM_H 33 #define _RISCV_ASM_H 34 35 #define _C_LABEL(x) x 36 37 #define __CONCAT(x,y) x ## y 38 #define __STRING(x) #x 39 40 #define ___CONCAT(x,y) __CONCAT(x,y) 41 42 /* 43 * Define -pg profile entry code. 44 * Must always be noreorder, must never use a macro instruction 45 * Final addiu to t9 must always equal the size of this _KERN_MCOUNT 46 */ 47 #define _KERN_MCOUNT \ 48 .set push; \ 49 subi sp, sp, CALLFRAME_SIZE; \ 50 REG_S a0, CALLFRAME_S0(sp); \ 51 REG_S ra, CALLFRAME_RA(sp); \ 52 move a0, ra; \ 53 call _mcount \ 54 REG_L ra, CALLFRAME_RA(sp); \ 55 REG_L a0, CALLFRAME_S0(sp); \ 56 addi sp, sp, CALLFRAME_SIZ; \ 57 .set pop; 58 59 #ifdef GPROF 60 #define _PROF_PROLOGUE _KERN_MCOUNT 61 #else 62 #define _PROF_PROLOGUE 63 #endif 64 65 #ifdef __PIC__ 66 #define PLT(x) x##@plt 67 #else 68 #define PLT(x) x 69 #endif 70 71 /* 72 * WEAK_ALIAS: create a weak alias. 73 */ 74 #define WEAK_ALIAS(alias,sym) \ 75 .weak alias; \ 76 alias = sym 77 /* 78 * STRONG_ALIAS: create a strong alias. 79 */ 80 #define STRONG_ALIAS(alias,sym) \ 81 .globl alias; \ 82 alias = sym 83 84 /* 85 * WARN_REFERENCES: create a warning if the specified symbol is referenced. 86 */ 87 #define WARN_REFERENCES(sym,msg) \ 88 .pushsection __CONCAT(.gnu.warning.,sym); \ 89 .ascii msg; \ 90 .popsection 91 92 #define _ENTRY(x) \ 93 .globl _C_LABEL(x); \ 94 .type _C_LABEL(x), @function; \ 95 _C_LABEL(x): 96 97 #define ENTRY_NP(x) .text; .align 2; _ENTRY(x) 98 #define ENTRY(x) ENTRY_NP(x); _PROF_PROLOGUE 99 #define ALTENTRY(x) _ENTRY(x) 100 #define END(x) .size _C_LABEL(x), . - _C_LABEL(x) 101 102 /* 103 * Macros to panic and printf from assembly language. 104 */ 105 #define PANIC(msg) \ 106 la a0, 9f; \ 107 call _C_LABEL(panic); \ 108 MSG(msg) 109 110 #define PRINTF(msg) \ 111 la a0, 9f; \ 112 call _C_LABEL(printf); \ 113 MSG(msg) 114 115 #define MSG(msg) \ 116 .pushsection .rodata.str1.8,"aMS",@progbits,1; \ 117 9: .asciiz msg; \ 118 .popsection 119 120 #define ASMSTR(str) \ 121 .asciiz str; \ 122 .align 3 123 124 #ifdef _NETBSD_REVISIONID 125 #define __RCSID(x) .pushsection ".ident","MS",@progbits,1; \ 126 .asciz "$" "NetBSD: " __FILE__ \ 127 " " _NETBSD_REVISIONID " $"; \ 128 .asciz x; \ 129 .popsection 130 #else 131 #define __RCSID(x) .pushsection ".ident","MS",@progbits,1; \ 132 .asciz x; \ 133 .popsection 134 #endif 135 #define RCSID(name) __RCSID(name) 136 137 #if defined(_LP64) 138 #define SZREG 8 139 #else 140 #define SZREG 4 141 #endif 142 143 #define ALSK 15 /* stack alignment */ 144 #define ALMASK -15 /* stack alignment */ 145 #define SZFPREG 8 146 #define FP_L fld 147 #define FP_S fsd 148 149 /* 150 * standard callframe { 151 * register_t cf_sp; frame pointer 152 * register_t cf_ra; return address 153 * }; 154 */ 155 #define CALLFRAME_SIZ (SZREG * 4) 156 #define CALLFRAME_S1 (CALLFRAME_SIZ - 4 * SZREG) 157 #define CALLFRAME_S0 (CALLFRAME_SIZ - 3 * SZREG) 158 #define CALLFRAME_SP (CALLFRAME_SIZ - 2 * SZREG) 159 #define CALLFRAME_RA (CALLFRAME_SIZ - 1 * SZREG) 160 161 /* 162 * These macros hide the use of rv32 and rv64 instructions from the 163 * assembler to prevent the assembler from generating 64-bit style 164 * ABI calls. 165 */ 166 #define PTR_ADD add 167 #define PTR_ADDI addi 168 #define PTR_SUB sub 169 #define PTR_SUBI subi 170 #define PTR_LA la 171 #define PTR_SLLI slli 172 #define PTR_SLL sll 173 #define PTR_SRLI srli 174 #define PTR_SRL srl 175 #define PTR_SRAI srai 176 #define PTR_SRA sra 177 #if _LP64 178 #define PTR_L ld 179 #define PTR_S sd 180 #define PTR_LR lr.d 181 #define PTR_SC sc.d 182 #define PTR_WORD .dword 183 #define PTR_SCALESHIFT 3 184 #else 185 #define PTR_L lw 186 #define PTR_S sw 187 #define PTR_LR lr.w 188 #define PTR_SC sc.w 189 #define PTR_WORD .word 190 #define PTR_SCALESHIFT 2 191 #endif 192 193 #define INT_L lw 194 #define INT_LA la 195 #define INT_S sw 196 #define INT_LR lr.w 197 #define INT_SC sc.w 198 #define INT_WORD .word 199 #define INT_SCALESHIFT 2 200 #ifdef _LP64 201 #define INT_ADD addw 202 #define INT_ADDI addwi 203 #define INT_SUB subw 204 #define INT_SUBI subwi 205 #define INT_SLL sllwi 206 #define INT_SLLV sllw 207 #define INT_SRL srlwi 208 #define INT_SRLV srlw 209 #define INT_SRA srawi 210 #define INT_SRAV sraw 211 #else 212 #define INT_ADD add 213 #define INT_ADDI addi 214 #define INT_SUB sub 215 #define INT_SUBI subi 216 #define INT_SLLI slli 217 #define INT_SLL sll 218 #define INT_SRLI srli 219 #define INT_SRL srl 220 #define INT_SRAI srai 221 #define INT_SRA sra 222 #endif 223 224 #define LONG_LA la 225 #define LONG_ADD add 226 #define LONG_ADDI addi 227 #define LONG_SUB sub 228 #define LONG_SUBI subi 229 #define LONG_SLLI slli 230 #define LONG_SLL sll 231 #define LONG_SRLI srli 232 #define LONG_SRL srl 233 #define LONG_SRAI srai 234 #define LONG_SRA sra 235 #ifdef _LP64 236 #define LONG_L ld 237 #define LONG_S sd 238 #define LONG_LR lr.d 239 #define LONG_SC sc.d 240 #define LONG_WORD .quad 241 #define LONG_SCALESHIFT 3 242 #else 243 #define LONG_L lw 244 #define LONG_S sw 245 #define LONG_LR lr.w 246 #define LONG_SC sc.w 247 #define LONG_WORD .word 248 #define LONG_SCALESHIFT 2 249 #endif 250 251 #define REG_LI li 252 #define REG_ADD add 253 #define REG_SLLI slli 254 #define REG_SLL sll 255 #define REG_SRLI srli 256 #define REG_SRL srl 257 #define REG_SRAI srai 258 #define REG_SRA sra 259 #if _LP64 260 #define REG_L ld 261 #define REG_S sd 262 #define REG_LR lr.d 263 #define REG_SC sc.d 264 #define REG_SCALESHIFT 3 265 #else 266 #define REG_L lw 267 #define REG_S sw 268 #define REG_LR lr.w 269 #define REG_SC sc.w 270 #define REG_SCALESHIFT 2 271 #endif 272 273 #define CPUVAR(off) _C_LABEL(cpu_info_store)+__CONCAT(CPU_INFO_,off) 274 275 #endif /* _RISCV_ASM_H */ 276
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