arch/arc/include/asm/arcregs.h

   1 /*
   2  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef _ASM_ARC_ARCREGS_H
  10 #define _ASM_ARC_ARCREGS_H
  11
  12 /* Build Configuration Registers */
  13 #define ARC_REG_DCCMBASE_BCR    0x61    /* DCCM Base Addr */
  14 #define ARC_REG_CRC_BCR         0x62
  15 #define ARC_REG_VECBASE_BCR     0x68
  16 #define ARC_REG_PERIBASE_BCR    0x69
  17 #define ARC_REG_FP_BCR          0x6B    /* ARCompact: Single-Precision FPU */
  18 #define ARC_REG_DPFP_BCR        0x6C    /* ARCompact: Dbl Precision FPU */
  19 #define ARC_REG_FP_V2_BCR       0xc8    /* ARCv2 FPU */
  20 #define ARC_REG_DCCM_BCR        0x74    /* DCCM Present + SZ */
  21 #define ARC_REG_TIMERS_BCR      0x75
  22 #define ARC_REG_AP_BCR          0x76
  23 #define ARC_REG_ICCM_BCR        0x78
  24 #define ARC_REG_XY_MEM_BCR      0x79
  25 #define ARC_REG_MAC_BCR         0x7a
  26 #define ARC_REG_MUL_BCR         0x7b
  27 #define ARC_REG_SWAP_BCR        0x7c
  28 #define ARC_REG_NORM_BCR        0x7d
  29 #define ARC_REG_MIXMAX_BCR      0x7e
  30 #define ARC_REG_BARREL_BCR      0x7f
  31 #define ARC_REG_D_UNCACH_BCR    0x6A
  32 #define ARC_REG_BPU_BCR         0xc0
  33 #define ARC_REG_ISA_CFG_BCR     0xc1
  34 #define ARC_REG_RTT_BCR         0xF2
  35 #define ARC_REG_IRQ_BCR         0xF3
  36 #define ARC_REG_SMART_BCR       0xFF
  37
  38 /* status32 Bits Positions */
  39 #define STATUS_AE_BIT           5       /* Exception active */
  40 #define STATUS_DE_BIT           6       /* PC is in delay slot */
  41 #define STATUS_U_BIT            7       /* User/Kernel mode */
  42 #define STATUS_L_BIT            12      /* Loop inhibit */
  43
  44 /* These masks correspond to the status word(STATUS_32) bits */
  45 #define STATUS_AE_MASK          (1<<STATUS_AE_BIT)
  46 #define STATUS_DE_MASK          (1<<STATUS_DE_BIT)
  47 #define STATUS_U_MASK           (1<<STATUS_U_BIT)
  48 #define STATUS_L_MASK           (1<<STATUS_L_BIT)
  49
  50 /*
  51  * ECR: Exception Cause Reg bits-n-pieces
  52  * [23:16] = Exception Vector
  53  * [15: 8] = Exception Cause Code
  54  * [ 7: 0] = Exception Parameters (for certain types only)
  55  */
  56 #ifdef CONFIG_ISA_ARCOMPACT
  57 #define ECR_V_MEM_ERR                   0x01
  58 #define ECR_V_INSN_ERR                  0x02
  59 #define ECR_V_MACH_CHK                  0x20
  60 #define ECR_V_ITLB_MISS                 0x21
  61 #define ECR_V_DTLB_MISS                 0x22
  62 #define ECR_V_PROTV                     0x23
  63 #define ECR_V_TRAP                      0x25
  64 #else
  65 #define ECR_V_MEM_ERR                   0x01
  66 #define ECR_V_INSN_ERR                  0x02
  67 #define ECR_V_MACH_CHK                  0x03
  68 #define ECR_V_ITLB_MISS                 0x04
  69 #define ECR_V_DTLB_MISS                 0x05
  70 #define ECR_V_PROTV                     0x06
  71 #define ECR_V_TRAP                      0x09
  72 #endif
  73
  74 /* DTLB Miss and Protection Violation Cause Codes */
  75
  76 #define ECR_C_PROTV_INST_FETCH          0x00
  77 #define ECR_C_PROTV_LOAD                0x01
  78 #define ECR_C_PROTV_STORE               0x02
  79 #define ECR_C_PROTV_XCHG                0x03
  80 #define ECR_C_PROTV_MISALIG_DATA        0x04
  81
  82 #define ECR_C_BIT_PROTV_MISALIG_DATA    10
  83
  84 /* Machine Check Cause Code Values */
  85 #define ECR_C_MCHK_DUP_TLB              0x01
  86
  87 /* DTLB Miss Exception Cause Code Values */
  88 #define ECR_C_BIT_DTLB_LD_MISS          8
  89 #define ECR_C_BIT_DTLB_ST_MISS          9
  90
  91
  92 /* Auxiliary registers */
  93 #define AUX_IDENTITY            4
  94 #define AUX_INTR_VEC_BASE       0x25
  95
  96
  97 /*
  98  * Floating Pt Registers
  99  * Status regs are read-only (build-time) so need not be saved/restored
 100  */
 101 #define ARC_AUX_FP_STAT         0x300
 102 #define ARC_AUX_DPFP_1L         0x301
 103 #define ARC_AUX_DPFP_1H         0x302
 104 #define ARC_AUX_DPFP_2L         0x303
 105 #define ARC_AUX_DPFP_2H         0x304
 106 #define ARC_AUX_DPFP_STAT       0x305
 107
 108 #ifndef __ASSEMBLY__
 109
 110 /*
 111  ******************************************************************
 112  *      Inline ASM macros to read/write AUX Regs
 113  *      Essentially invocation of lr/sr insns from "C"
 114  */
 115
 116 #if 1
 117
 118 #define read_aux_reg(reg)       __builtin_arc_lr(reg)
 119
 120 /* gcc builtin sr needs reg param to be long immediate */
 121 #define write_aux_reg(reg_immed, val)           \
 122                 __builtin_arc_sr((unsigned int)val, reg_immed)
 123
 124 #else
 125
 126 #define read_aux_reg(reg)               \
 127 ({                                      \
 128         unsigned int __ret;             \
 129         __asm__ __volatile__(           \
 130         "       lr    %0, [%1]"         \
 131         : "=r"(__ret)                   \
 132         : "i"(reg));                    \
 133         __ret;                          \
 134 })
 135
 136 /*
 137  * Aux Reg address is specified as long immediate by caller
 138  * e.g.
 139  *    write_aux_reg(0x69, some_val);
 140  * This generates tightest code.
 141  */
 142 #define write_aux_reg(reg_imm, val)     \
 143 ({                                      \
 144         __asm__ __volatile__(           \
 145         "       sr   %0, [%1]   \n"     \
 146         :                               \
 147         : "ir"(val), "i"(reg_imm));     \
 148 })
 149
 150 /*
 151  * Aux Reg address is specified in a variable
 152  *  * e.g.
 153  *      reg_num = 0x69
 154  *      write_aux_reg2(reg_num, some_val);
 155  * This has to generate glue code to load the reg num from
 156  *  memory to a reg hence not recommended.
 157  */
 158 #define write_aux_reg2(reg_in_var, val)         \
 159 ({                                              \
 160         unsigned int tmp;                       \
 161                                                 \
 162         __asm__ __volatile__(                   \
 163         "       ld   %0, [%2]   \n\t"           \
 164         "       sr   %1, [%0]   \n\t"           \
 165         : "=&r"(tmp)                            \
 166         : "r"(val), "memory"(&reg_in_var));     \
 167 })
 168
 169 #endif
 170
 171 #define READ_BCR(reg, into)                             \
 172 {                                                       \
 173         unsigned int tmp;                               \
 174         tmp = read_aux_reg(reg);                        \
 175         if (sizeof(tmp) == sizeof(into)) {              \
 176                 into = *((typeof(into) *)&tmp);         \
 177         } else {                                        \
 178                 extern void bogus_undefined(void);      \
 179                 bogus_undefined();                      \
 180         }                                               \
 181 }
 182
 183 #define WRITE_AUX(reg, into)                            \
 184 {                                                       \
 185         unsigned int tmp;                               \
 186         if (sizeof(tmp) == sizeof(into)) {              \
 187                 tmp = (*(unsigned int *)&(into));       \
 188                 write_aux_reg(reg, tmp);                \
 189         } else  {                                       \
 190                 extern void bogus_undefined(void);      \
 191                 bogus_undefined();                      \
 192         }                                               \
 193 }
 194
 195 /* Helpers */
 196 #define TO_KB(bytes)            ((bytes) >> 10)
 197 #define TO_MB(bytes)            (TO_KB(bytes) >> 10)
 198 #define PAGES_TO_KB(n_pages)    ((n_pages) << (PAGE_SHIFT - 10))
 199 #define PAGES_TO_MB(n_pages)    (PAGES_TO_KB(n_pages) >> 10)
 200
 201
 202 /*
 203  ***************************************************************
 204  * Build Configuration Registers, with encoded hardware config
 205  */
 206 struct bcr_identity {
 207 #ifdef CONFIG_CPU_BIG_ENDIAN
 208         unsigned int chip_id:16, cpu_id:8, family:8;
 209 #else
 210         unsigned int family:8, cpu_id:8, chip_id:16;
 211 #endif
 212 };
 213
 214 struct bcr_isa {
 215 #ifdef CONFIG_CPU_BIG_ENDIAN
 216         unsigned int div_rem:4, pad2:4, ldd:1, unalign:1, atomic:1, be:1,
 217                      pad1:11, atomic1:1, ver:8;
 218 #else
 219         unsigned int ver:8, atomic1:1, pad1:11, be:1, atomic:1, unalign:1,
 220                      ldd:1, pad2:4, div_rem:4;
 221 #endif
 222 };
 223
 224 struct bcr_mpy {
 225 #ifdef CONFIG_CPU_BIG_ENDIAN
 226         unsigned int pad:8, x1616:8, dsp:4, cycles:2, type:2, ver:8;
 227 #else
 228         unsigned int ver:8, type:2, cycles:2, dsp:4, x1616:8, pad:8;
 229 #endif
 230 };
 231
 232 struct bcr_extn_xymem {
 233 #ifdef CONFIG_CPU_BIG_ENDIAN
 234         unsigned int ram_org:2, num_banks:4, bank_sz:4, ver:8;
 235 #else
 236         unsigned int ver:8, bank_sz:4, num_banks:4, ram_org:2;
 237 #endif
 238 };
 239
 240 struct bcr_perip {
 241 #ifdef CONFIG_CPU_BIG_ENDIAN
 242         unsigned int start:8, pad2:8, sz:8, pad:8;
 243 #else
 244         unsigned int pad:8, sz:8, pad2:8, start:8;
 245 #endif
 246 };
 247
 248 struct bcr_iccm {
 249 #ifdef CONFIG_CPU_BIG_ENDIAN
 250         unsigned int base:16, pad:5, sz:3, ver:8;
 251 #else
 252         unsigned int ver:8, sz:3, pad:5, base:16;
 253 #endif
 254 };
 255
 256 /* DCCM Base Address Register: ARC_REG_DCCMBASE_BCR */
 257 struct bcr_dccm_base {
 258 #ifdef CONFIG_CPU_BIG_ENDIAN
 259         unsigned int addr:24, ver:8;
 260 #else
 261         unsigned int ver:8, addr:24;
 262 #endif
 263 };
 264
 265 /* DCCM RAM Configuration Register: ARC_REG_DCCM_BCR */
 266 struct bcr_dccm {
 267 #ifdef CONFIG_CPU_BIG_ENDIAN
 268         unsigned int res:21, sz:3, ver:8;
 269 #else
 270         unsigned int ver:8, sz:3, res:21;
 271 #endif
 272 };
 273
 274 /* ARCompact: Both SP and DP FPU BCRs have same format */
 275 struct bcr_fp_arcompact {
 276 #ifdef CONFIG_CPU_BIG_ENDIAN
 277         unsigned int fast:1, ver:8;
 278 #else
 279         unsigned int ver:8, fast:1;
 280 #endif
 281 };
 282
 283 struct bcr_fp_arcv2 {
 284 #ifdef CONFIG_CPU_BIG_ENDIAN
 285         unsigned int pad2:15, dp:1, pad1:7, sp:1, ver:8;
 286 #else
 287         unsigned int ver:8, sp:1, pad1:7, dp:1, pad2:15;
 288 #endif
 289 };
 290
 291 struct bcr_timer {
 292 #ifdef CONFIG_CPU_BIG_ENDIAN
 293         unsigned int pad2:15, rtsc:1, pad1:5, rtc:1, t1:1, t0:1, ver:8;
 294 #else
 295         unsigned int ver:8, t0:1, t1:1, rtc:1, pad1:5, rtsc:1, pad2:15;
 296 #endif
 297 };
 298
 299 struct bcr_bpu_arcompact {
 300 #ifdef CONFIG_CPU_BIG_ENDIAN
 301         unsigned int pad2:19, fam:1, pad:2, ent:2, ver:8;
 302 #else
 303         unsigned int ver:8, ent:2, pad:2, fam:1, pad2:19;
 304 #endif
 305 };
 306
 307 struct bcr_bpu_arcv2 {
 308 #ifdef CONFIG_CPU_BIG_ENDIAN
 309         unsigned int pad:6, fbe:2, tqe:2, ts:4, ft:1, rse:2, pte:3, bce:3, ver:8;
 310 #else
 311         unsigned int ver:8, bce:3, pte:3, rse:2, ft:1, ts:4, tqe:2, fbe:2, pad:6;
 312 #endif
 313 };
 314
 315 struct bcr_generic {
 316 #ifdef CONFIG_CPU_BIG_ENDIAN
 317         unsigned int pad:24, ver:8;
 318 #else
 319         unsigned int ver:8, pad:24;
 320 #endif
 321 };
 322
 323 /*
 324  *******************************************************************
 325  * Generic structures to hold build configuration used at runtime
 326  */
 327
 328 struct cpuinfo_arc_mmu {
 329         unsigned int ver:4, pg_sz_k:8, pad:8, u_dtlb:6, u_itlb:6;
 330         unsigned int num_tlb:16, sets:12, ways:4;
 331 };
 332
 333 struct cpuinfo_arc_cache {
 334         unsigned int sz_k:8, line_len:8, assoc:4, ver:4, alias:1, vipt:1, pad:6;
 335 };
 336
 337 struct cpuinfo_arc_bpu {
 338         unsigned int ver, full, num_cache, num_pred;
 339 };
 340
 341 struct cpuinfo_arc_ccm {
 342         unsigned int base_addr, sz;
 343 };
 344
 345 struct cpuinfo_arc {
 346         struct cpuinfo_arc_cache icache, dcache;
 347         struct cpuinfo_arc_mmu mmu;
 348         struct cpuinfo_arc_bpu bpu;
 349         struct bcr_identity core;
 350         struct bcr_isa isa;
 351         struct bcr_timer timers;
 352         unsigned int vec_base;
 353         struct cpuinfo_arc_ccm iccm, dccm;
 354         struct {
 355                 unsigned int swap:1, norm:1, minmax:1, barrel:1, crc:1, pad1:3,
 356                              fpu_sp:1, fpu_dp:1, pad2:6,
 357                              debug:1, ap:1, smart:1, rtt:1, pad3:4,
 358                              pad4:8;
 359         } extn;
 360         struct bcr_mpy extn_mpy;
 361         struct bcr_extn_xymem extn_xymem;
 362 };
 363
 364 extern struct cpuinfo_arc cpuinfo_arc700[];
 365
 366 static inline int is_isa_arcv2(void)
 367 {
 368         return IS_ENABLED(CONFIG_ISA_ARCV2);
 369 }
 370
 371 static inline int is_isa_arcompact(void)
 372 {
 373         return IS_ENABLED(CONFIG_ISA_ARCOMPACT);
 374 }
 375
 376 #if defined(CONFIG_ISA_ARCOMPACT) && !defined(_CPU_DEFAULT_A7)
 377 #error "Toolchain not configured for ARCompact builds"
 378 #elif defined(CONFIG_ISA_ARCV2) && !defined(_CPU_DEFAULT_HS)
 379 #error "Toolchain not configured for ARCv2 builds"
 380 #endif
 381
 382 #endif /* __ASEMBLY__ */
 383
 384 #endif /* _ASM_ARC_ARCREGS_H */