arch/arm/net/bpf_jit_32.h

   1 /*
   2  * Just-In-Time compiler for BPF filters on 32bit ARM
   3  *
   4  * Copyright (c) 2011 Mircea Gherzan <mgherzan@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; version 2 of the License.
   9  */
  10
  11 #ifndef PFILTER_OPCODES_ARM_H
  12 #define PFILTER_OPCODES_ARM_H
  13
  14 #define ARM_R0  0
  15 #define ARM_R1  1
  16 #define ARM_R2  2
  17 #define ARM_R3  3
  18 #define ARM_R4  4
  19 #define ARM_R5  5
  20 #define ARM_R6  6
  21 #define ARM_R7  7
  22 #define ARM_R8  8
  23 #define ARM_R9  9
  24 #define ARM_R10 10
  25 #define ARM_FP  11
  26 #define ARM_IP  12
  27 #define ARM_SP  13
  28 #define ARM_LR  14
  29 #define ARM_PC  15
  30
  31 #define ARM_COND_EQ             0x0
  32 #define ARM_COND_NE             0x1
  33 #define ARM_COND_CS             0x2
  34 #define ARM_COND_HS             ARM_COND_CS
  35 #define ARM_COND_CC             0x3
  36 #define ARM_COND_LO             ARM_COND_CC
  37 #define ARM_COND_MI             0x4
  38 #define ARM_COND_PL             0x5
  39 #define ARM_COND_VS             0x6
  40 #define ARM_COND_VC             0x7
  41 #define ARM_COND_HI             0x8
  42 #define ARM_COND_LS             0x9
  43 #define ARM_COND_GE             0xa
  44 #define ARM_COND_LT             0xb
  45 #define ARM_COND_GT             0xc
  46 #define ARM_COND_LE             0xd
  47 #define ARM_COND_AL             0xe
  48
  49 /* register shift types */
  50 #define SRTYPE_LSL              0
  51 #define SRTYPE_LSR              1
  52 #define SRTYPE_ASR              2
  53 #define SRTYPE_ROR              3
  54
  55 #define ARM_INST_ADD_R          0x00800000
  56 #define ARM_INST_ADD_I          0x02800000
  57
  58 #define ARM_INST_AND_R          0x00000000
  59 #define ARM_INST_AND_I          0x02000000
  60
  61 #define ARM_INST_BIC_R          0x01c00000
  62 #define ARM_INST_BIC_I          0x03c00000
  63
  64 #define ARM_INST_B              0x0a000000
  65 #define ARM_INST_BX             0x012FFF10
  66 #define ARM_INST_BLX_R          0x012fff30
  67
  68 #define ARM_INST_CMP_R          0x01500000
  69 #define ARM_INST_CMP_I          0x03500000
  70
  71 #define ARM_INST_LDRB_I         0x05d00000
  72 #define ARM_INST_LDRB_R         0x07d00000
  73 #define ARM_INST_LDRH_I         0x01d000b0
  74 #define ARM_INST_LDR_I          0x05900000
  75
  76 #define ARM_INST_LDM            0x08900000
  77
  78 #define ARM_INST_LSL_I          0x01a00000
  79 #define ARM_INST_LSL_R          0x01a00010
  80
  81 #define ARM_INST_LSR_I          0x01a00020
  82 #define ARM_INST_LSR_R          0x01a00030
  83
  84 #define ARM_INST_MOV_R          0x01a00000
  85 #define ARM_INST_MOV_I          0x03a00000
  86 #define ARM_INST_MOVW           0x03000000
  87 #define ARM_INST_MOVT           0x03400000
  88
  89 #define ARM_INST_MUL            0x00000090
  90
  91 #define ARM_INST_POP            0x08bd0000
  92 #define ARM_INST_PUSH           0x092d0000
  93
  94 #define ARM_INST_ORR_R          0x01800000
  95 #define ARM_INST_ORR_I          0x03800000
  96
  97 #define ARM_INST_REV            0x06bf0f30
  98 #define ARM_INST_REV16          0x06bf0fb0
  99
 100 #define ARM_INST_RSB_I          0x02600000
 101
 102 #define ARM_INST_SUB_R          0x00400000
 103 #define ARM_INST_SUB_I          0x02400000
 104
 105 #define ARM_INST_STR_I          0x05800000
 106
 107 #define ARM_INST_TST_R          0x01100000
 108 #define ARM_INST_TST_I          0x03100000
 109
 110 #define ARM_INST_UDIV           0x0730f010
 111
 112 #define ARM_INST_UMULL          0x00800090
 113
 114 /* register */
 115 #define _AL3_R(op, rd, rn, rm)  ((op ## _R) | (rd) << 12 | (rn) << 16 | (rm))
 116 /* immediate */
 117 #define _AL3_I(op, rd, rn, imm) ((op ## _I) | (rd) << 12 | (rn) << 16 | (imm))
 118
 119 #define ARM_ADD_R(rd, rn, rm)   _AL3_R(ARM_INST_ADD, rd, rn, rm)
 120 #define ARM_ADD_I(rd, rn, imm)  _AL3_I(ARM_INST_ADD, rd, rn, imm)
 121
 122 #define ARM_AND_R(rd, rn, rm)   _AL3_R(ARM_INST_AND, rd, rn, rm)
 123 #define ARM_AND_I(rd, rn, imm)  _AL3_I(ARM_INST_AND, rd, rn, imm)
 124
 125 #define ARM_BIC_R(rd, rn, rm)   _AL3_R(ARM_INST_BIC, rd, rn, rm)
 126 #define ARM_BIC_I(rd, rn, imm)  _AL3_I(ARM_INST_BIC, rd, rn, imm)
 127
 128 #define ARM_B(imm24)            (ARM_INST_B | ((imm24) & 0xffffff))
 129 #define ARM_BX(rm)              (ARM_INST_BX | (rm))
 130 #define ARM_BLX_R(rm)           (ARM_INST_BLX_R | (rm))
 131
 132 #define ARM_CMP_R(rn, rm)       _AL3_R(ARM_INST_CMP, 0, rn, rm)
 133 #define ARM_CMP_I(rn, imm)      _AL3_I(ARM_INST_CMP, 0, rn, imm)
 134
 135 #define ARM_LDR_I(rt, rn, off)  (ARM_INST_LDR_I | (rt) << 12 | (rn) << 16 \
 136                                  | (off))
 137 #define ARM_LDRB_I(rt, rn, off) (ARM_INST_LDRB_I | (rt) << 12 | (rn) << 16 \
 138                                  | (off))
 139 #define ARM_LDRB_R(rt, rn, rm)  (ARM_INST_LDRB_R | (rt) << 12 | (rn) << 16 \
 140                                  | (rm))
 141 #define ARM_LDRH_I(rt, rn, off) (ARM_INST_LDRH_I | (rt) << 12 | (rn) << 16 \
 142                                  | (((off) & 0xf0) << 4) | ((off) & 0xf))
 143
 144 #define ARM_LDM(rn, regs)       (ARM_INST_LDM | (rn) << 16 | (regs))
 145
 146 #define ARM_LSL_R(rd, rn, rm)   (_AL3_R(ARM_INST_LSL, rd, 0, rn) | (rm) << 8)
 147 #define ARM_LSL_I(rd, rn, imm)  (_AL3_I(ARM_INST_LSL, rd, 0, rn) | (imm) << 7)
 148
 149 #define ARM_LSR_R(rd, rn, rm)   (_AL3_R(ARM_INST_LSR, rd, 0, rn) | (rm) << 8)
 150 #define ARM_LSR_I(rd, rn, imm)  (_AL3_I(ARM_INST_LSR, rd, 0, rn) | (imm) << 7)
 151
 152 #define ARM_MOV_R(rd, rm)       _AL3_R(ARM_INST_MOV, rd, 0, rm)
 153 #define ARM_MOV_I(rd, imm)      _AL3_I(ARM_INST_MOV, rd, 0, imm)
 154
 155 #define ARM_MOVW(rd, imm)       \
 156         (ARM_INST_MOVW | ((imm) >> 12) << 16 | (rd) << 12 | ((imm) & 0x0fff))
 157
 158 #define ARM_MOVT(rd, imm)       \
 159         (ARM_INST_MOVT | ((imm) >> 12) << 16 | (rd) << 12 | ((imm) & 0x0fff))
 160
 161 #define ARM_MUL(rd, rm, rn)     (ARM_INST_MUL | (rd) << 16 | (rm) << 8 | (rn))
 162
 163 #define ARM_POP(regs)           (ARM_INST_POP | (regs))
 164 #define ARM_PUSH(regs)          (ARM_INST_PUSH | (regs))
 165
 166 #define ARM_ORR_R(rd, rn, rm)   _AL3_R(ARM_INST_ORR, rd, rn, rm)
 167 #define ARM_ORR_I(rd, rn, imm)  _AL3_I(ARM_INST_ORR, rd, rn, imm)
 168 #define ARM_ORR_S(rd, rn, rm, type, rs) \
 169         (ARM_ORR_R(rd, rn, rm) | (type) << 5 | (rs) << 7)
 170
 171 #define ARM_REV(rd, rm)         (ARM_INST_REV | (rd) << 12 | (rm))
 172 #define ARM_REV16(rd, rm)       (ARM_INST_REV16 | (rd) << 12 | (rm))
 173
 174 #define ARM_RSB_I(rd, rn, imm)  _AL3_I(ARM_INST_RSB, rd, rn, imm)
 175
 176 #define ARM_SUB_R(rd, rn, rm)   _AL3_R(ARM_INST_SUB, rd, rn, rm)
 177 #define ARM_SUB_I(rd, rn, imm)  _AL3_I(ARM_INST_SUB, rd, rn, imm)
 178
 179 #define ARM_STR_I(rt, rn, off)  (ARM_INST_STR_I | (rt) << 12 | (rn) << 16 \
 180                                  | (off))
 181
 182 #define ARM_TST_R(rn, rm)       _AL3_R(ARM_INST_TST, 0, rn, rm)
 183 #define ARM_TST_I(rn, imm)      _AL3_I(ARM_INST_TST, 0, rn, imm)
 184
 185 #define ARM_UDIV(rd, rn, rm)    (ARM_INST_UDIV | (rd) << 16 | (rn) | (rm) << 8)
 186
 187 #define ARM_UMULL(rd_lo, rd_hi, rn, rm) (ARM_INST_UMULL | (rd_hi) << 16 \
 188                                          | (rd_lo) << 12 | (rm) << 8 | rn)
 189
 190 #endif /* PFILTER_OPCODES_ARM_H */