src/target/arm_opcodes.h

   1 /*
   2  * Copyright (C) 2005 by Dominic Rath
   3  * Dominic.Rath@gmx.de
   4  *
   5  * Copyright (C) 2006 by Magnus Lundin
   6  * lundin@mlu.mine.nu
   7  *
   8  * Copyright (C) 2008 by Spencer Oliver
   9  * spen@spen-soft.co.uk
  10  *
  11  * Copyright (C) 2009 by Øyvind Harboe
  12  * oyvind.harboe@zylin.com
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the
  26  * Free Software Foundation, Inc.,
  27  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  28  */
  29 #ifndef __ARM_OPCODES_H
  30 #define __ARM_OPCODES_H
  31
  32 /**
  33  * @file
  34  * Macros used to generate various ARM or Thumb opcodes.
  35  */
  36
  37 /* ARM mode instructions */
  38
  39 /* Store multiple increment after
  40  * Rn: base register
  41  * List: for each bit in list: store register
  42  * S: in priviledged mode: store user-mode registers
  43  * W = 1: update the base register. W = 0: leave the base register untouched
  44  */
  45 #define ARMV4_5_STMIA(Rn, List, S, W) \
  46         (0xe8800000 | ((S) << 22) | ((W) << 21) | ((Rn) << 16) | (List))
  47
  48 /* Load multiple increment after
  49  * Rn: base register
  50  * List: for each bit in list: store register
  51  * S: in priviledged mode: store user-mode registers
  52  * W = 1: update the base register. W = 0: leave the base register untouched
  53  */
  54 #define ARMV4_5_LDMIA(Rn, List, S, W) \
  55         (0xe8900000 | ((S) << 22) | ((W) << 21) | ((Rn) << 16) | (List))
  56
  57 /* MOV r8, r8 */
  58 #define ARMV4_5_NOP                                     (0xe1a08008)
  59
  60 /* Move PSR to general purpose register
  61  * R = 1: SPSR R = 0: CPSR
  62  * Rn: target register
  63  */
  64 #define ARMV4_5_MRS(Rn, R)      (0xe10f0000 | ((R) << 22) | ((Rn) << 12))
  65
  66 /* Store register
  67  * Rd: register to store
  68  * Rn: base register
  69  */
  70 #define ARMV4_5_STR(Rd, Rn)     (0xe5800000 | ((Rd) << 12) | ((Rn) << 16))
  71
  72 /* Load register
  73  * Rd: register to load
  74  * Rn: base register
  75  */
  76 #define ARMV4_5_LDR(Rd, Rn)     (0xe5900000 | ((Rd) << 12) | ((Rn) << 16))
  77
  78 /* Move general purpose register to PSR
  79  * R = 1: SPSR R = 0: CPSR
  80  * Field: Field mask
  81  * 1: control field 2: extension field 4: status field 8: flags field
  82  * Rm: source register
  83  */
  84 #define ARMV4_5_MSR_GP(Rm, Field, R) \
  85         (0xe120f000 | (Rm) | ((Field) << 16) | ((R) << 22))
  86 #define ARMV4_5_MSR_IM(Im, Rotate, Field, R) \
  87         (0xe320f000 | (Im)  | ((Rotate) << 8) | ((Field) << 16) | ((R) << 22))
  88
  89 /* Load Register Halfword Immediate Post-Index
  90  * Rd: register to load
  91  * Rn: base register
  92  */
  93 #define ARMV4_5_LDRH_IP(Rd, Rn) (0xe0d000b2 | ((Rd) << 12) | ((Rn) << 16))
  94
  95 /* Load Register Byte Immediate Post-Index
  96  * Rd: register to load
  97  * Rn: base register
  98  */
  99 #define ARMV4_5_LDRB_IP(Rd, Rn) (0xe4d00001 | ((Rd) << 12) | ((Rn) << 16))
 100
 101 /* Store register Halfword Immediate Post-Index
 102  * Rd: register to store
 103  * Rn: base register
 104  */
 105 #define ARMV4_5_STRH_IP(Rd, Rn) (0xe0c000b2 | ((Rd) << 12) | ((Rn) << 16))
 106
 107 /* Store register Byte Immediate Post-Index
 108  * Rd: register to store
 109  * Rn: base register
 110  */
 111 #define ARMV4_5_STRB_IP(Rd, Rn) (0xe4c00001 | ((Rd) << 12) | ((Rn) << 16))
 112
 113 /* Branch (and Link)
 114  * Im: Branch target (left-shifted by 2 bits, added to PC)
 115  * L: 1: branch and link 0: branch only
 116  */
 117 #define ARMV4_5_B(Im, L) (0xea000000 | (Im) | ((L) << 24))
 118
 119 /* Branch and exchange (ARM state)
 120  * Rm: register holding branch target address
 121  */
 122 #define ARMV4_5_BX(Rm) (0xe12fff10 | (Rm))
 123
 124 /* Move to ARM register from coprocessor
 125  * CP: Coprocessor number
 126  * op1: Coprocessor opcode
 127  * Rd: destination register
 128  * CRn: first coprocessor operand
 129  * CRm: second coprocessor operand
 130  * op2: Second coprocessor opcode
 131  */
 132 #define ARMV4_5_MRC(CP, op1, Rd, CRn, CRm, op2) \
 133         (0xee100010 | (CRm) | ((op2) << 5) | ((CP) << 8) \
 134         | ((Rd) << 12) | ((CRn) << 16) | ((op1) << 21))
 135
 136 /* Move to coprocessor from ARM register
 137  * CP: Coprocessor number
 138  * op1: Coprocessor opcode
 139  * Rd: destination register
 140  * CRn: first coprocessor operand
 141  * CRm: second coprocessor operand
 142  * op2: Second coprocessor opcode
 143  */
 144 #define ARMV4_5_MCR(CP, op1, Rd, CRn, CRm, op2) \
 145         (0xee000010 | (CRm) | ((op2) << 5) | ((CP) << 8) \
 146         | ((Rd) << 12) | ((CRn) << 16) | ((op1) << 21))
 147
 148 /* Breakpoint instruction (ARMv5)
 149  * Im: 16-bit immediate
 150  */
 151 #define ARMV5_BKPT(Im) (0xe1200070 | ((Im & 0xfff0) << 8) | (Im & 0xf))
 152
 153
 154 /* Thumb mode instructions
 155  *
 156  * NOTE: these 16-bit opcodes fill both halves of a word with the same
 157  * value.  The reason for this is that when we need to execute Thumb
 158  * opcodes on ARM7/ARM9 cores (to switch to ARM state on debug entry),
 159  * we must shift 32 bits to the bus using scan chain 1 ... if we write
 160  * both halves, we don't need to track which half matters.  On ARMv6 and
 161  * ARMv7 we don't execute Thumb instructions in debug mode; the ITR
 162  * register does not accept Thumb (or Thumb2) opcodes.
 163  */
 164
 165 /* Store register (Thumb mode)
 166  * Rd: source register
 167  * Rn: base register
 168  */
 169 #define ARMV4_5_T_STR(Rd, Rn) \
 170         ((0x6000 | (Rd) | ((Rn) << 3)) | \
 171         ((0x6000 | (Rd) | ((Rn) << 3)) << 16))
 172
 173 /* Load register (Thumb state)
 174  * Rd: destination register
 175  * Rn: base register
 176  */
 177 #define ARMV4_5_T_LDR(Rd, Rn) \
 178         ((0x6800 | ((Rn) << 3) | (Rd)) \
 179         | ((0x6800 | ((Rn) << 3) | (Rd)) << 16))
 180
 181 /* Load multiple (Thumb state)
 182  * Rn: base register
 183  * List: for each bit in list: store register
 184  */
 185 #define ARMV4_5_T_LDMIA(Rn, List) \
 186         ((0xc800 | ((Rn) << 8) | (List)) \
 187         | ((0xc800 | ((Rn) << 8) | (List)) << 16))
 188
 189 /* Load register with PC relative addressing
 190  * Rd: register to load
 191  */
 192 #define ARMV4_5_T_LDR_PCREL(Rd) \
 193         ((0x4800 | ((Rd) << 8)) \
 194         | ((0x4800 | ((Rd) << 8)) << 16))
 195
 196 /* Move hi register (Thumb mode)
 197  * Rd: destination register
 198  * Rm: source register
 199  */
 200 #define ARMV4_5_T_MOV(Rd, Rm) \
 201         ((0x4600 | ((Rd) & 0x7) | (((Rd) & 0x8) << 4) | \
 202                 (((Rm) & 0x7) << 3) | (((Rm) & 0x8) << 3)) \
 203         | ((0x4600 | ((Rd) & 0x7) | (((Rd) & 0x8) << 4) | \
 204                 (((Rm) & 0x7) << 3) | (((Rm) & 0x8) << 3)) << 16))
 205
 206 /* No operation (Thumb mode)
 207  * NOTE:  this is "MOV r8, r8" ... Thumb2 adds two
 208  * architected NOPs, 16-bit and 32-bit.
 209  */
 210 #define ARMV4_5_T_NOP   (0x46c0 | (0x46c0 << 16))
 211
 212 /* Move immediate to register (Thumb state)
 213  * Rd: destination register
 214  * Im: 8-bit immediate value
 215  */
 216 #define ARMV4_5_T_MOV_IM(Rd, Im) \
 217         ((0x2000 | ((Rd) << 8) | (Im)) \
 218         | ((0x2000 | ((Rd) << 8) | (Im)) << 16))
 219
 220 /* Branch and Exchange
 221  * Rm: register containing branch target
 222  */
 223 #define ARMV4_5_T_BX(Rm) \
 224         ((0x4700 | ((Rm) << 3)) \
 225         | ((0x4700 | ((Rm) << 3)) << 16))
 226
 227 /* Branch (Thumb state)
 228  * Imm: Branch target
 229  */
 230 #define ARMV4_5_T_B(Imm) \
 231         ((0xe000 | (Imm)) \
 232         | ((0xe000 | (Imm)) << 16))
 233
 234 /* Breakpoint instruction (ARMv5) (Thumb state)
 235  * Im: 8-bit immediate
 236  */
 237 #define ARMV5_T_BKPT(Im) \
 238         ((0xbe00 | (Im)) \
 239         | ((0xbe00 | (Im)) << 16))
 240
 241 /* Move to Register from Special Register
 242  *      32 bit Thumb2 instruction
 243  * Rd: destination register
 244  * SYSm: source special register
 245  */
 246 #define ARM_T2_MRS(Rd, SYSm) \
 247         ((0xF3EF) | ((0x8000 | (Rd << 8) | SYSm) << 16))
 248
 249 /* Move from Register from Special Register
 250  *      32 bit Thumb2 instruction
 251  * Rd: source register
 252  * SYSm: destination special register
 253  */
 254 #define ARM_T2_MSR(SYSm, Rn) \
 255         ((0xF380 | (Rn << 8)) | ((0x8800 | SYSm) << 16))
 256
 257 /* Change Processor State.
 258  *      16 bit Thumb2 instruction
 259  * Rd: source register
 260  * IF: A_FLAG and/or I_FLAG and/or F_FLAG
 261  */
 262 #define A_FLAG 4
 263 #define I_FLAG 2
 264 #define F_FLAG 1
 265 #define ARM_T2_CPSID(IF) \
 266         ((0xB660 | (1 << 8) | ((IF)&0x3)) \
 267         | ((0xB660 | (1 << 8) | ((IF)&0x3)) << 16))
 268 #define ARM_T2_CPSIE(IF) \
 269         ((0xB660 | (0 << 8) | ((IF)&0x3)) \
 270         | ((0xB660 | (0 << 8) | ((IF)&0x3)) << 16))
 271
 272 #endif /* __ARM_OPCODES_H */