src/soc/decoder/power_enums.py

   1 from enum import Enum, unique
   2 import csv
   3 import os
   4 import requests
   5 from os.path import dirname, join
   6
   7 def find_wiki_file(name):
   8     filedir = os.path.dirname(os.path.abspath(__file__))
   9     basedir = dirname(dirname(dirname(filedir)))
  10     tabledir = join(basedir, 'libreriscv')
  11     tabledir = join(tabledir, 'openpower')
  12     tabledir = join(tabledir, 'isatables')
  13
  14     file_path = join(tabledir, name)
  15     return file_path
  16
  17
  18 def get_csv(name):
  19     file_path = find_wiki_file(name)
  20     with open(file_path, 'r') as csvfile:
  21         reader = csv.DictReader(csvfile)
  22         return list(reader)
  23
  24
  25 # names of the fields in the tables that don't correspond to an enum
  26 single_bit_flags = ['CR in', 'CR out', 'inv A', 'inv out',
  27                     'cry out', 'BR', 'sgn ext', 'upd', 'rsrv', '32b',
  28                     'sgn', 'lk', 'sgl pipe']
  29
  30 # default values for fields in the table
  31 default_values = {'unit': "NONE", 'internal op': "OP_ILLEGAL",
  32                   'in1': "RA", 'in2': 'NONE', 'in3': 'NONE', 'out': 'NONE',
  33                   'ldst len': 'NONE',
  34                   'rc': 'NONE', 'cry in': 'ZERO', 'form': 'NONE'}
  35
  36
  37 def get_signal_name(name):
  38     if name[0].isdigit():
  39         name = "is_" + name
  40     return name.lower().replace(' ', '_')
  41
  42
  43 @unique
  44 class Function(Enum):
  45     NONE = 0
  46     ALU = 1
  47     LDST = 2
  48
  49
  50 @unique
  51 class Form(Enum):
  52     NONE = 0
  53     I = 1
  54     B = 2
  55     SC = 3
  56     D = 4
  57     DS = 5
  58     DQ = 6
  59     DX = 7
  60     X = 8
  61     XL = 9
  62     XFX = 10
  63     XFL = 11
  64     XX1 = 12
  65     XX2 = 13
  66     XX3 = 14
  67     XX4 = 15
  68     XS = 16
  69     XO = 17
  70     A = 18
  71     M = 19
  72     MD = 20
  73     MDS = 21
  74     VA = 22
  75     VC = 23
  76     VX = 24
  77     EVX = 25
  78     EVS = 26
  79     Z22 = 27
  80     Z23 = 28
  81
  82
  83 # Internal Operation numbering.  Add new opcodes here (FPADD, FPMUL etc.)
  84 @unique
  85 class InternalOp(Enum):
  86     OP_ILLEGAL = 0     # important that this is zero (see power_decoder.py)
  87     OP_NOP = 1
  88     OP_ADD = 2
  89     OP_ADDPCIS = 3
  90     OP_AND = 4
  91     OP_ATTN = 5
  92     OP_B = 6
  93     OP_BC = 7
  94     OP_BCREG = 8
  95     OP_BPERM = 9
  96     OP_CMP = 10
  97     OP_CMPB = 11
  98     OP_CMPEQB = 12
  99     OP_CMPRB = 13
 100     OP_CNTZ = 14
 101     OP_CRAND = 15
 102     OP_CRANDC = 16
 103     OP_CREQV = 17
 104     OP_CRNAND = 18
 105     OP_CRNOR = 19
 106     OP_CROR = 20
 107     OP_CRORC = 21
 108     OP_CRXOR = 22
 109     OP_DARN = 23
 110     OP_DCBF = 24
 111     OP_DCBST = 25
 112     OP_DCBT = 26
 113     OP_DCBTST = 27
 114     OP_DCBZ = 28
 115     OP_DIV = 29
 116     OP_DIVE = 30
 117     OP_EXTS = 31
 118     OP_EXTSWSLI = 32
 119     OP_ICBI = 33
 120     OP_ICBT = 34
 121     OP_ISEL = 35
 122     OP_ISYNC = 36
 123     OP_LOAD = 37
 124     OP_STORE = 38
 125     OP_MADDHD = 39
 126     OP_MADDHDU = 40
 127     OP_MADDLD = 41
 128     OP_MCRF = 42
 129     OP_MCRXR = 43
 130     OP_MCRXRX = 44
 131     OP_MFCR = 45
 132     OP_MFSPR = 46
 133     OP_MOD = 47
 134     OP_MTCRF = 48
 135     OP_MTSPR = 49
 136     OP_MUL_L64 = 50
 137     OP_MUL_H64 = 51
 138     OP_MUL_H32 = 52
 139     OP_OR = 53
 140     OP_POPCNT = 54
 141     OP_PRTY = 55
 142     OP_RLC = 56
 143     OP_RLCL = 57
 144     OP_RLCR = 58
 145     OP_SETB = 59
 146     OP_SHL = 60
 147     OP_SHR = 61
 148     OP_SYNC = 62
 149     OP_TD = 63
 150     OP_TDI = 64
 151     OP_TW = 65
 152     OP_TWI = 66
 153     OP_XOR = 67
 154     OP_SIM_CONFIG = 68
 155
 156
 157 @unique
 158 class In1Sel(Enum):
 159     NONE = 0
 160     RA = 1
 161     RA_OR_ZERO = 2
 162     SPR = 3
 163
 164
 165 @unique
 166 class In2Sel(Enum):
 167     NONE = 0
 168     RB = 1
 169     CONST_UI = 2
 170     CONST_SI = 3
 171     CONST_UI_HI = 4
 172     CONST_SI_HI = 5
 173     CONST_LI = 6
 174     CONST_BD = 7
 175     CONST_DS = 8
 176     CONST_M1 = 9
 177     CONST_SH = 10
 178     CONST_SH32 = 11
 179     SPR = 12
 180
 181
 182 @unique
 183 class In3Sel(Enum):
 184     NONE = 0
 185     RS = 1
 186
 187
 188 @unique
 189 class OutSel(Enum):
 190     NONE = 0
 191     RT = 1
 192     RA = 2
 193     SPR = 3
 194
 195
 196 @unique
 197 class LdstLen(Enum):
 198     NONE = 0
 199     is1B = 1
 200     is2B = 2
 201     is4B = 3
 202     is8B = 4
 203
 204
 205 @unique
 206 class RC(Enum):
 207     NONE = 0
 208     ONE = 1
 209     RC = 2
 210
 211
 212 @unique
 213 class CryIn(Enum):
 214     ZERO = 0
 215     ONE = 1
 216     CA = 2
 217
 218
 219 # SPRs - Special-Purpose Registers.  See V3.0B Figure 18 p971 and
 220 # http://libre-riscv.org/openpower/isatables/sprs.csv
 221 # http://bugs.libre-riscv.org/show_bug.cgi?id=261
 222
 223 spr_csv = get_csv("sprs.csv")
 224 fields = [(row['SPR'], int(row['Idx'])) for row in spr_csv]
 225 SPR = Enum('SPR', fields)