1 /* SPDX-License-Identifier: GPL-2.0-or-later */
4 * Copyright (C) 2005 by Dominic Rath
7 * Copyright (C) 2006 by Magnus Lundin
10 * Copyright (C) 2008 by Spencer Oliver
11 * spen@spen-soft.co.uk
13 * Copyright (C) 2009 by Øyvind Harboe
14 * oyvind.harboe@zylin.com
17 #ifndef OPENOCD_TARGET_ARM_OPCODES_H
18 #define OPENOCD_TARGET_ARM_OPCODES_H
22 * Macros used to generate various ARM or Thumb opcodes.
25 /* ARM mode instructions */
27 /* Store multiple increment after
29 * list: for each bit in list: store register
30 * s: in privileged mode: store user-mode registers
31 * w = 1: update the base register. w = 0: leave the base register untouched
33 #define ARMV4_5_STMIA(rn, list, s, w) \
34 (0xe8800000 | ((s) << 22) | ((w) << 21) | ((rn) << 16) | (list))
36 /* Load multiple increment after
38 * list: for each bit in list: store register
39 * s: in privileged mode: store user-mode registers
40 * w = 1: update the base register. w = 0: leave the base register untouched
42 #define ARMV4_5_LDMIA(rn, list, s, w) \
43 (0xe8900000 | ((s) << 22) | ((w) << 21) | ((rn) << 16) | (list))
46 #define ARMV4_5_NOP (0xe1a08008)
48 /* Move PSR to general purpose register
49 * r = 1: SPSR r = 0: CPSR
52 #define ARMV4_5_MRS(rn, r) (0xe10f0000 | ((r) << 22) | ((rn) << 12))
55 * rd: register to store
58 #define ARMV4_5_STR(rd, rn) (0xe5800000 | ((rd) << 12) | ((rn) << 16))
61 * rd: register to load
64 #define ARMV4_5_LDR(rd, rn) (0xe5900000 | ((rd) << 12) | ((rn) << 16))
66 /* Move general purpose register to PSR
67 * r = 1: SPSR r = 0: CPSR
69 * 1: control field 2: extension field 4: status field 8: flags field
72 #define ARMV4_5_MSR_GP(rm, field, r) \
73 (0xe120f000 | (rm) | ((field) << 16) | ((r) << 22))
74 #define ARMV4_5_MSR_IM(im, rotate, field, r) \
75 (0xe320f000 | (im) | ((rotate) << 8) | ((field) << 16) | ((r) << 22))
77 /* Load Register Word Immediate Post-Index
78 * rd: register to load
81 #define ARMV4_5_LDRW_IP(rd, rn) (0xe4900004 | ((rd) << 12) | ((rn) << 16))
83 /* Load Register Halfword Immediate Post-Index
84 * rd: register to load
87 #define ARMV4_5_LDRH_IP(rd, rn) (0xe0d000b2 | ((rd) << 12) | ((rn) << 16))
89 /* Load Register Byte Immediate Post-Index
90 * rd: register to load
93 #define ARMV4_5_LDRB_IP(rd, rn) (0xe4d00001 | ((rd) << 12) | ((rn) << 16))
95 /* Store register Word Immediate Post-Index
96 * rd: register to store
99 #define ARMV4_5_STRW_IP(rd, rn) (0xe4800004 | ((rd) << 12) | ((rn) << 16))
101 /* Store register Halfword Immediate Post-Index
102 * rd: register to store
105 #define ARMV4_5_STRH_IP(rd, rn) (0xe0c000b2 | ((rd) << 12) | ((rn) << 16))
107 /* Store register Byte Immediate Post-Index
108 * rd: register to store
111 #define ARMV4_5_STRB_IP(rd, rn) (0xe4c00001 | ((rd) << 12) | ((rn) << 16))
114 * im: Branch target (left-shifted by 2 bits, added to PC)
115 * l: 1: branch and link 0: branch only
117 #define ARMV4_5_B(im, l) (0xea000000 | (im) | ((l) << 24))
119 /* Branch and exchange (ARM state)
120 * rm: register holding branch target address
122 #define ARMV4_5_BX(rm) (0xe12fff10 | (rm))
124 /* Copies two words from two ARM core registers
125 * into a doubleword extension register, or
126 * from a doubleword extension register to two ARM core registers.
127 * See Armv7-A arch reference manual section A8.8.345
128 * rt: Arm core register 1
129 * rt2: Arm core register 2
130 * vm: The doubleword extension register
132 * op: to_arm_registers = (op == ‘1’);
134 #define ARMV4_5_VMOV(op, rt2, rt, m, vm) \
135 (0xec400b10 | ((op) << 20) | ((rt2) << 16) | \
136 ((rt) << 12) | ((m) << 5) | (vm))
138 /* Moves the value of the FPSCR to an ARM core register
139 * rt: Arm core register
141 #define ARMV4_5_VMRS(rt) (0xeef10a10 | ((rt) << 12))
143 /* Moves the value of an ARM core register to the FPSCR.
144 * rt: Arm core register
146 #define ARMV4_5_VMSR(rt) (0xeee10a10 | ((rt) << 12))
148 /* Store data from coprocessor to consecutive memory
149 * See Armv7-A arch doc section A8.6.187
150 * p: 1=index mode (offset from rn)
151 * u: 1=add, 0=subtract rn address with imm
152 * d: Opcode D encoding
153 * w: write back the offset start address to the rn register
154 * cp: Coprocessor number (4 bits)
155 * crd: Coprocessor source register (4 bits)
156 * rn: Base register for memory address (4 bits)
157 * imm: Immediate value (0 - 1020, must be divisible by 4)
159 #define ARMV4_5_STC(p, u, d, w, cp, crd, rn, imm) \
160 (0xec000000 | ((p) << 24) | ((u) << 23) | ((d) << 22) | \
161 ((w) << 21) | ((rn) << 16) | ((crd) << 12) | ((cp) << 8) | ((imm)>>2))
163 /* Loads data from consecutive memory to coprocessor
164 * See Armv7-A arch doc section A8.6.51
165 * p: 1=index mode (offset from rn)
166 * u: 1=add, 0=subtract rn address with imm
167 * d: Opcode D encoding
168 * w: write back the offset start address to the rn register
169 * cp: Coprocessor number (4 bits)
170 * crd: Coprocessor dest register (4 bits)
171 * rn: Base register for memory address (4 bits)
172 * imm: Immediate value (0 - 1020, must be divisible by 4)
174 #define ARMV4_5_LDC(p, u, d, w, cp, crd, rn, imm) \
175 (0xec100000 | ((p) << 24) | ((u) << 23) | ((d) << 22) | \
176 ((w) << 21) | ((rn) << 16) | ((crd) << 12) | ((cp) << 8) | ((imm) >> 2))
178 /* Move to ARM register from coprocessor
179 * cp: Coprocessor number
180 * op1: Coprocessor opcode
181 * rd: destination register
182 * crn: first coprocessor operand
183 * crm: second coprocessor operand
184 * op2: Second coprocessor opcode
186 #define ARMV4_5_MRC(cp, op1, rd, crn, crm, op2) \
187 (0xee100010 | (crm) | ((op2) << 5) | ((cp) << 8) \
188 | ((rd) << 12) | ((crn) << 16) | ((op1) << 21))
190 /* Move to coprocessor from ARM register
191 * cp: Coprocessor number
192 * op1: Coprocessor opcode
193 * rd: destination register
194 * crn: first coprocessor operand
195 * crm: second coprocessor operand
196 * op2: Second coprocessor opcode
198 #define ARMV4_5_MCR(cp, op1, rd, crn, crm, op2) \
199 (0xee000010 | (crm) | ((op2) << 5) | ((cp) << 8) \
200 | ((rd) << 12) | ((crn) << 16) | ((op1) << 21))
202 /* Breakpoint instruction (ARMv5)
203 * im: 16-bit immediate
205 #define ARMV5_BKPT(im) (0xe1200070 | ((im & 0xfff0) << 4) | (im & 0xf))
208 /* Thumb mode instructions
210 * NOTE: these 16-bit opcodes fill both halves of a word with the same
211 * value. The reason for this is that when we need to execute Thumb
212 * opcodes on ARM7/ARM9 cores (to switch to ARM state on debug entry),
213 * we must shift 32 bits to the bus using scan chain 1 ... if we write
214 * both halves, we don't need to track which half matters. On ARMv6 and
215 * ARMv7 we don't execute Thumb instructions in debug mode; the ITR
216 * register does not accept Thumb (or Thumb2) opcodes.
219 /* Store register (Thumb mode)
220 * rd: source register
223 #define ARMV4_5_T_STR(rd, rn) \
224 ((0x6000 | (rd) | ((rn) << 3)) | \
225 ((0x6000 | (rd) | ((rn) << 3)) << 16))
227 /* Load register (Thumb state)
228 * rd: destination register
231 #define ARMV4_5_T_LDR(rd, rn) \
232 ((0x6800 | ((rn) << 3) | (rd)) \
233 | ((0x6800 | ((rn) << 3) | (rd)) << 16))
235 /* Load multiple (Thumb state)
237 * list: for each bit in list: store register
239 #define ARMV4_5_T_LDMIA(rn, list) \
240 ((0xc800 | ((rn) << 8) | (list)) \
241 | ((0xc800 | ((rn) << 8) | (list)) << 16))
243 /* Load register with PC relative addressing
244 * rd: register to load
246 #define ARMV4_5_T_LDR_PCREL(rd) \
247 ((0x4800 | ((rd) << 8)) \
248 | ((0x4800 | ((rd) << 8)) << 16))
250 /* Move hi register (Thumb mode)
251 * rd: destination register
252 * rm: source register
254 #define ARMV4_5_T_MOV(rd, rm) \
255 ((0x4600 | ((rd) & 0x7) | (((rd) & 0x8) << 4) | \
256 (((rm) & 0x7) << 3) | (((rm) & 0x8) << 3)) \
257 | ((0x4600 | ((rd) & 0x7) | (((rd) & 0x8) << 4) | \
258 (((rm) & 0x7) << 3) | (((rm) & 0x8) << 3)) << 16))
260 /* No operation (Thumb mode)
261 * NOTE: this is "MOV r8, r8" ... Thumb2 adds two
262 * architected NOPs, 16-bit and 32-bit.
264 #define ARMV4_5_T_NOP (0x46c0 | (0x46c0 << 16))
266 /* Move immediate to register (Thumb state)
267 * rd: destination register
268 * im: 8-bit immediate value
270 #define ARMV4_5_T_MOV_IM(rd, im) \
271 ((0x2000 | ((rd) << 8) | (im)) \
272 | ((0x2000 | ((rd) << 8) | (im)) << 16))
274 /* Branch and Exchange
275 * rm: register containing branch target
277 #define ARMV4_5_T_BX(rm) \
278 ((0x4700 | ((rm) << 3)) \
279 | ((0x4700 | ((rm) << 3)) << 16))
281 /* Branch (Thumb state)
284 #define ARMV4_5_T_B(imm) \
286 | ((0xe000 | (imm)) << 16))
288 /* Breakpoint instruction (ARMv5) (Thumb state)
289 * Im: 8-bit immediate
291 #define ARMV5_T_BKPT(im) \
293 | ((0xbe00 | (im)) << 16))
295 /* Move to Register from Special Register
296 * 32 bit Thumb2 instruction
297 * rd: destination register
298 * sysm: source special register
300 #define ARM_T2_MRS(rd, sysm) \
301 ((0xF3EF) | ((0x8000 | (rd << 8) | sysm) << 16))
303 /* Move from Register from Special Register
304 * 32 bit Thumb2 instruction
305 * rd: source register
306 * sysm: destination special register
308 #define ARM_T2_MSR(sysm, rn) \
309 ((0xF380 | (rn << 8)) | ((0x8800 | sysm) << 16))
311 /* Change Processor State.
312 * 16 bit Thumb2 instruction
313 * rd: source register
314 * IF: A_FLAG and/or I_FLAG and/or F_FLAG
319 #define ARM_T2_CPSID(_if) \
320 ((0xB660 | (1 << 8) | ((_if)&0x3)) \
321 | ((0xB660 | (1 << 8) | ((_if)&0x3)) << 16))
322 #define ARM_T2_CPSIE(_if) \
323 ((0xB660 | (0 << 8) | ((_if)&0x3)) \
324 | ((0xB660 | (0 << 8) | ((_if)&0x3)) << 16))
326 #endif /* OPENOCD_TARGET_ARM_OPCODES_H */