1 /* 2 * Copyright (C) 2016-2017 Netronome Systems, Inc. 3 * 4 * This software is dual licensed under the GNU General License Version 2, 5 * June 1991 as shown in the file COPYING in the top-level directory of this 6 * source tree or the BSD 2-Clause License provided below. You have the 7 * option to license this software under the complete terms of either license. 8 * 9 * The BSD 2-Clause License: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * 2. Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #ifndef __NFP_ASM_H__ 35 #define __NFP_ASM_H__ 1 36 37 #include <linux/bitfield.h> 38 #include <linux/bug.h> 39 #include <linux/types.h> 40 41 #define REG_NONE 0 42 43 #define RE_REG_NO_DST 0x020 44 #define RE_REG_IMM 0x020 45 #define RE_REG_IMM_encode(x) \ 46 (RE_REG_IMM | ((x) & 0x1f) | (((x) & 0x60) << 1)) 47 #define RE_REG_IMM_MAX 0x07fULL 48 #define RE_REG_LM 0x050 49 #define RE_REG_LM_IDX 0x008 50 #define RE_REG_LM_IDX_MAX 0x7 51 #define RE_REG_XFR 0x080 52 53 #define UR_REG_XFR 0x180 54 #define UR_REG_LM 0x200 55 #define UR_REG_LM_IDX 0x020 56 #define UR_REG_LM_POST_MOD 0x010 57 #define UR_REG_LM_POST_MOD_DEC 0x001 58 #define UR_REG_LM_IDX_MAX 0xf 59 #define UR_REG_NN 0x280 60 #define UR_REG_NO_DST 0x300 61 #define UR_REG_IMM UR_REG_NO_DST 62 #define UR_REG_IMM_encode(x) (UR_REG_IMM | (x)) 63 #define UR_REG_IMM_MAX 0x0ffULL 64 65 #define OP_BR_BASE 0x0d800000020ULL 66 #define OP_BR_BASE_MASK 0x0f8000c3ce0ULL 67 #define OP_BR_MASK 0x0000000001fULL 68 #define OP_BR_EV_PIP 0x00000000300ULL 69 #define OP_BR_CSS 0x0000003c000ULL 70 #define OP_BR_DEFBR 0x00000300000ULL 71 #define OP_BR_ADDR_LO 0x007ffc00000ULL 72 #define OP_BR_ADDR_HI 0x10000000000ULL 73 74 #define nfp_is_br(_insn) \ 75 (((_insn) & OP_BR_BASE_MASK) == OP_BR_BASE) 76 77 enum br_mask { 78 BR_BEQ = 0x00, 79 BR_BNE = 0x01, 80 BR_BMI = 0x02, 81 BR_BHS = 0x04, 82 BR_BLO = 0x05, 83 BR_BGE = 0x08, 84 BR_BLT = 0x09, 85 BR_UNC = 0x18, 86 }; 87 88 enum br_ev_pip { 89 BR_EV_PIP_UNCOND = 0, 90 BR_EV_PIP_COND = 1, 91 }; 92 93 enum br_ctx_signal_state { 94 BR_CSS_NONE = 2, 95 }; 96 97 u16 br_get_offset(u64 instr); 98 void br_set_offset(u64 *instr, u16 offset); 99 void br_add_offset(u64 *instr, u16 offset); 100 101 #define OP_BBYTE_BASE 0x0c800000000ULL 102 #define OP_BB_A_SRC 0x000000000ffULL 103 #define OP_BB_BYTE 0x00000000300ULL 104 #define OP_BB_B_SRC 0x0000003fc00ULL 105 #define OP_BB_I8 0x00000040000ULL 106 #define OP_BB_EQ 0x00000080000ULL 107 #define OP_BB_DEFBR 0x00000300000ULL 108 #define OP_BB_ADDR_LO 0x007ffc00000ULL 109 #define OP_BB_ADDR_HI 0x10000000000ULL 110 #define OP_BB_SRC_LMEXTN 0x40000000000ULL 111 112 #define OP_BALU_BASE 0x0e800000000ULL 113 #define OP_BA_A_SRC 0x000000003ffULL 114 #define OP_BA_B_SRC 0x000000ffc00ULL 115 #define OP_BA_DEFBR 0x00000300000ULL 116 #define OP_BA_ADDR_HI 0x0007fc00000ULL 117 118 #define OP_IMMED_A_SRC 0x000000003ffULL 119 #define OP_IMMED_B_SRC 0x000000ffc00ULL 120 #define OP_IMMED_IMM 0x0000ff00000ULL 121 #define OP_IMMED_WIDTH 0x00060000000ULL 122 #define OP_IMMED_INV 0x00080000000ULL 123 #define OP_IMMED_SHIFT 0x00600000000ULL 124 #define OP_IMMED_BASE 0x0f000000000ULL 125 #define OP_IMMED_WR_AB 0x20000000000ULL 126 #define OP_IMMED_SRC_LMEXTN 0x40000000000ULL 127 #define OP_IMMED_DST_LMEXTN 0x80000000000ULL 128 129 enum immed_width { 130 IMMED_WIDTH_ALL = 0, 131 IMMED_WIDTH_BYTE = 1, 132 IMMED_WIDTH_WORD = 2, 133 }; 134 135 enum immed_shift { 136 IMMED_SHIFT_0B = 0, 137 IMMED_SHIFT_1B = 1, 138 IMMED_SHIFT_2B = 2, 139 }; 140 141 u16 immed_get_value(u64 instr); 142 void immed_set_value(u64 *instr, u16 immed); 143 void immed_add_value(u64 *instr, u16 offset); 144 145 #define OP_SHF_BASE 0x08000000000ULL 146 #define OP_SHF_A_SRC 0x000000000ffULL 147 #define OP_SHF_SC 0x00000000300ULL 148 #define OP_SHF_B_SRC 0x0000003fc00ULL 149 #define OP_SHF_I8 0x00000040000ULL 150 #define OP_SHF_SW 0x00000080000ULL 151 #define OP_SHF_DST 0x0000ff00000ULL 152 #define OP_SHF_SHIFT 0x001f0000000ULL 153 #define OP_SHF_OP 0x00e00000000ULL 154 #define OP_SHF_DST_AB 0x01000000000ULL 155 #define OP_SHF_WR_AB 0x20000000000ULL 156 #define OP_SHF_SRC_LMEXTN 0x40000000000ULL 157 #define OP_SHF_DST_LMEXTN 0x80000000000ULL 158 159 enum shf_op { 160 SHF_OP_NONE = 0, 161 SHF_OP_AND = 2, 162 SHF_OP_OR = 5, 163 }; 164 165 enum shf_sc { 166 SHF_SC_R_ROT = 0, 167 SHF_SC_NONE = SHF_SC_R_ROT, 168 SHF_SC_R_SHF = 1, 169 SHF_SC_L_SHF = 2, 170 SHF_SC_R_DSHF = 3, 171 }; 172 173 #define OP_ALU_A_SRC 0x000000003ffULL 174 #define OP_ALU_B_SRC 0x000000ffc00ULL 175 #define OP_ALU_DST 0x0003ff00000ULL 176 #define OP_ALU_SW 0x00040000000ULL 177 #define OP_ALU_OP 0x00f80000000ULL 178 #define OP_ALU_DST_AB 0x01000000000ULL 179 #define OP_ALU_BASE 0x0a000000000ULL 180 #define OP_ALU_WR_AB 0x20000000000ULL 181 #define OP_ALU_SRC_LMEXTN 0x40000000000ULL 182 #define OP_ALU_DST_LMEXTN 0x80000000000ULL 183 184 enum alu_op { 185 ALU_OP_NONE = 0x00, 186 ALU_OP_ADD = 0x01, 187 ALU_OP_NOT = 0x04, 188 ALU_OP_ADD_2B = 0x05, 189 ALU_OP_AND = 0x08, 190 ALU_OP_SUB_C = 0x0d, 191 ALU_OP_ADD_C = 0x11, 192 ALU_OP_OR = 0x14, 193 ALU_OP_SUB = 0x15, 194 ALU_OP_XOR = 0x18, 195 }; 196 197 enum alu_dst_ab { 198 ALU_DST_A = 0, 199 ALU_DST_B = 1, 200 }; 201 202 #define OP_LDF_BASE 0x0c000000000ULL 203 #define OP_LDF_A_SRC 0x000000000ffULL 204 #define OP_LDF_SC 0x00000000300ULL 205 #define OP_LDF_B_SRC 0x0000003fc00ULL 206 #define OP_LDF_I8 0x00000040000ULL 207 #define OP_LDF_SW 0x00000080000ULL 208 #define OP_LDF_ZF 0x00000100000ULL 209 #define OP_LDF_BMASK 0x0000f000000ULL 210 #define OP_LDF_SHF 0x001f0000000ULL 211 #define OP_LDF_WR_AB 0x20000000000ULL 212 #define OP_LDF_SRC_LMEXTN 0x40000000000ULL 213 #define OP_LDF_DST_LMEXTN 0x80000000000ULL 214 215 #define OP_CMD_A_SRC 0x000000000ffULL 216 #define OP_CMD_CTX 0x00000000300ULL 217 #define OP_CMD_B_SRC 0x0000003fc00ULL 218 #define OP_CMD_TOKEN 0x000000c0000ULL 219 #define OP_CMD_XFER 0x00001f00000ULL 220 #define OP_CMD_CNT 0x0000e000000ULL 221 #define OP_CMD_SIG 0x000f0000000ULL 222 #define OP_CMD_TGT_CMD 0x07f00000000ULL 223 #define OP_CMD_INDIR 0x20000000000ULL 224 #define OP_CMD_MODE 0x1c0000000000ULL 225 226 struct cmd_tgt_act { 227 u8 token; 228 u8 tgt_cmd; 229 }; 230 231 enum cmd_tgt_map { 232 CMD_TGT_READ8, 233 CMD_TGT_WRITE8_SWAP, 234 CMD_TGT_WRITE32_SWAP, 235 CMD_TGT_READ32, 236 CMD_TGT_READ32_LE, 237 CMD_TGT_READ32_SWAP, 238 CMD_TGT_READ_LE, 239 CMD_TGT_READ_SWAP_LE, 240 __CMD_TGT_MAP_SIZE, 241 }; 242 243 extern const struct cmd_tgt_act cmd_tgt_act[__CMD_TGT_MAP_SIZE]; 244 245 enum cmd_mode { 246 CMD_MODE_40b_AB = 0, 247 CMD_MODE_40b_BA = 1, 248 CMD_MODE_32b = 4, 249 }; 250 251 enum cmd_ctx_swap { 252 CMD_CTX_SWAP = 0, 253 CMD_CTX_NO_SWAP = 3, 254 }; 255 256 #define CMD_OVE_LEN BIT(7) 257 #define CMD_OV_LEN GENMASK(12, 8) 258 259 #define OP_LCSR_BASE 0x0fc00000000ULL 260 #define OP_LCSR_A_SRC 0x000000003ffULL 261 #define OP_LCSR_B_SRC 0x000000ffc00ULL 262 #define OP_LCSR_WRITE 0x00000200000ULL 263 #define OP_LCSR_ADDR 0x001ffc00000ULL 264 #define OP_LCSR_SRC_LMEXTN 0x40000000000ULL 265 #define OP_LCSR_DST_LMEXTN 0x80000000000ULL 266 267 enum lcsr_wr_src { 268 LCSR_WR_AREG, 269 LCSR_WR_BREG, 270 LCSR_WR_IMM, 271 }; 272 273 #define OP_CARB_BASE 0x0e000000000ULL 274 #define OP_CARB_OR 0x00000010000ULL 275 276 #define NFP_CSR_CTX_PTR 0x20 277 #define NFP_CSR_ACT_LM_ADDR0 0x64 278 #define NFP_CSR_ACT_LM_ADDR1 0x6c 279 #define NFP_CSR_ACT_LM_ADDR2 0x94 280 #define NFP_CSR_ACT_LM_ADDR3 0x9c 281 282 /* Software register representation, independent of operand type */ 283 #define NN_REG_TYPE GENMASK(31, 24) 284 #define NN_REG_LM_IDX GENMASK(23, 22) 285 #define NN_REG_LM_IDX_HI BIT(23) 286 #define NN_REG_LM_IDX_LO BIT(22) 287 #define NN_REG_LM_MOD GENMASK(21, 20) 288 #define NN_REG_VAL GENMASK(7, 0) 289 290 enum nfp_bpf_reg_type { 291 NN_REG_GPR_A = BIT(0), 292 NN_REG_GPR_B = BIT(1), 293 NN_REG_GPR_BOTH = NN_REG_GPR_A | NN_REG_GPR_B, 294 NN_REG_NNR = BIT(2), 295 NN_REG_XFER = BIT(3), 296 NN_REG_IMM = BIT(4), 297 NN_REG_NONE = BIT(5), 298 NN_REG_LMEM = BIT(6), 299 }; 300 301 enum nfp_bpf_lm_mode { 302 NN_LM_MOD_NONE = 0, 303 NN_LM_MOD_INC, 304 NN_LM_MOD_DEC, 305 }; 306 307 #define reg_both(x) __enc_swreg((x), NN_REG_GPR_BOTH) 308 #define reg_a(x) __enc_swreg((x), NN_REG_GPR_A) 309 #define reg_b(x) __enc_swreg((x), NN_REG_GPR_B) 310 #define reg_nnr(x) __enc_swreg((x), NN_REG_NNR) 311 #define reg_xfer(x) __enc_swreg((x), NN_REG_XFER) 312 #define reg_imm(x) __enc_swreg((x), NN_REG_IMM) 313 #define reg_none() __enc_swreg(0, NN_REG_NONE) 314 #define reg_lm(x, off) __enc_swreg_lm((x), NN_LM_MOD_NONE, (off)) 315 #define reg_lm_inc(x) __enc_swreg_lm((x), NN_LM_MOD_INC, 0) 316 #define reg_lm_dec(x) __enc_swreg_lm((x), NN_LM_MOD_DEC, 0) 317 #define __reg_lm(x, mod, off) __enc_swreg_lm((x), (mod), (off)) 318 319 typedef __u32 __bitwise swreg; 320 321 static inline swreg __enc_swreg(u16 id, u8 type) 322 { 323 return (__force swreg)(id | FIELD_PREP(NN_REG_TYPE, type)); 324 } 325 326 static inline swreg __enc_swreg_lm(u8 id, enum nfp_bpf_lm_mode mode, u8 off) 327 { 328 WARN_ON(id > 3 || (off && mode != NN_LM_MOD_NONE)); 329 330 return (__force swreg)(FIELD_PREP(NN_REG_TYPE, NN_REG_LMEM) | 331 FIELD_PREP(NN_REG_LM_IDX, id) | 332 FIELD_PREP(NN_REG_LM_MOD, mode) | 333 off); 334 } 335 336 static inline u32 swreg_raw(swreg reg) 337 { 338 return (__force u32)reg; 339 } 340 341 static inline enum nfp_bpf_reg_type swreg_type(swreg reg) 342 { 343 return FIELD_GET(NN_REG_TYPE, swreg_raw(reg)); 344 } 345 346 static inline u16 swreg_value(swreg reg) 347 { 348 return FIELD_GET(NN_REG_VAL, swreg_raw(reg)); 349 } 350 351 static inline bool swreg_lm_idx(swreg reg) 352 { 353 return FIELD_GET(NN_REG_LM_IDX_LO, swreg_raw(reg)); 354 } 355 356 static inline bool swreg_lmextn(swreg reg) 357 { 358 return FIELD_GET(NN_REG_LM_IDX_HI, swreg_raw(reg)); 359 } 360 361 static inline enum nfp_bpf_lm_mode swreg_lm_mode(swreg reg) 362 { 363 return FIELD_GET(NN_REG_LM_MOD, swreg_raw(reg)); 364 } 365 366 struct nfp_insn_ur_regs { 367 enum alu_dst_ab dst_ab; 368 u16 dst; 369 u16 areg, breg; 370 bool swap; 371 bool wr_both; 372 bool dst_lmextn; 373 bool src_lmextn; 374 }; 375 376 struct nfp_insn_re_regs { 377 enum alu_dst_ab dst_ab; 378 u8 dst; 379 u8 areg, breg; 380 bool swap; 381 bool wr_both; 382 bool i8; 383 bool dst_lmextn; 384 bool src_lmextn; 385 }; 386 387 int swreg_to_unrestricted(swreg dst, swreg lreg, swreg rreg, 388 struct nfp_insn_ur_regs *reg); 389 int swreg_to_restricted(swreg dst, swreg lreg, swreg rreg, 390 struct nfp_insn_re_regs *reg, bool has_imm8); 391 392 #define NFP_USTORE_PREFETCH_WINDOW 8 393 394 int nfp_ustore_check_valid_no_ecc(u64 insn); 395 u64 nfp_ustore_calc_ecc_insn(u64 insn); 396 397 #define NFP_IND_ME_REFL_WR_SIG_INIT 3 398 #define NFP_IND_ME_CTX_PTR_BASE_MASK GENMASK(9, 0) 399 #define NFP_IND_NUM_CONTEXTS 8 400 401 static inline u32 nfp_get_ind_csr_ctx_ptr_offs(u32 read_offset) 402 { 403 return (read_offset & ~NFP_IND_ME_CTX_PTR_BASE_MASK) | NFP_CSR_CTX_PTR; 404 } 405 406 #endif 407