1 /* Simulator for Analog Devices Blackfin processors.
3 Copyright (C) 2005-2016 Free Software Foundation, Inc.
4 Contributed by Analog Devices, Inc.
6 This file is part of simulators.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
28 typedef uint16_t bu16;
29 typedef uint32_t bu32;
30 typedef uint64_t bu40;
31 typedef uint64_t bu64;
38 /* For dealing with parallel instructions, we must avoid changing our register
39 file until all parallel insns have been simulated. This queue of stores
40 can be used to delay a modification.
41 XXX: Should go and convert all 32 bit insns to use this. */
47 enum bfin_parallel_group {
49 BFIN_PARALLEL_GROUP0, /* 32bit slot. */
50 BFIN_PARALLEL_GROUP1, /* 16bit group1. */
51 BFIN_PARALLEL_GROUP2, /* 16bit group2. */
54 /* The KSP/USP handling wrt SP may not follow the hardware exactly (the hw
55 looks at current mode and uses either SP or USP based on that. We instead
56 always operate on SP and mirror things in KSP and USP. During a CEC
57 transition, we take care of syncing the values. This lowers the simulation
58 complexity and speeds things up a bit. */
61 bu32 dpregs[16], iregs[4], mregs[4], bregs[4], lregs[4], cycles[3];
63 bu32 lt[2], lc[2], lb[2];
64 bu32 ksp, usp, seqstat, syscfg, rets, reti, retx, retn, rete;
66 /* These ASTAT flags need not be bu32, but it makes pointers easier. */
67 bu32 ac0, ac0_copy, ac1, an, aq;
68 union { struct { bu32 av0; bu32 av1; }; bu32 av [2]; };
69 union { struct { bu32 av0s; bu32 av1s; }; bu32 avs[2]; };
70 bu32 az, cc, v, v_copy, vs;
75 /* Set by an instruction emulation function if we performed a jump. We
76 cannot compare oldpc to newpc as this ignores the "jump 0;" case. */
79 /* Used by the CEC to figure out where to return to. */
82 /* How many cycles did this insn take to complete ? */
85 /* The pc currently being interpreted in parallel insns. */
88 /* Some insns are valid in group1, and others in group2, so we
89 need to keep track of the exact slot we're processing. */
90 enum bfin_parallel_group group;
92 /* Needed for supporting the DISALGNEXCPT instruction */
95 /* See notes above for struct store. */
96 struct store stores[20];
100 /* Cache heavily used CPU-specific device pointers. */
108 #define REG_H_L(h, l) (((h) & 0xffff0000) | ((l) & 0x0000ffff))
110 #define DREG(x) (BFIN_CPU_STATE.dpregs[x])
111 #define PREG(x) (BFIN_CPU_STATE.dpregs[x + 8])
112 #define SPREG PREG (6)
113 #define FPREG PREG (7)
114 #define IREG(x) (BFIN_CPU_STATE.iregs[x])
115 #define MREG(x) (BFIN_CPU_STATE.mregs[x])
116 #define BREG(x) (BFIN_CPU_STATE.bregs[x])
117 #define LREG(x) (BFIN_CPU_STATE.lregs[x])
118 #define AXREG(x) (BFIN_CPU_STATE.ax[x])
119 #define AWREG(x) (BFIN_CPU_STATE.aw[x])
120 #define CCREG (BFIN_CPU_STATE.cc)
121 #define LCREG(x) (BFIN_CPU_STATE.lc[x])
122 #define LTREG(x) (BFIN_CPU_STATE.lt[x])
123 #define LBREG(x) (BFIN_CPU_STATE.lb[x])
124 #define CYCLESREG (BFIN_CPU_STATE.cycles[0])
125 #define CYCLES2REG (BFIN_CPU_STATE.cycles[1])
126 #define CYCLES2SHDREG (BFIN_CPU_STATE.cycles[2])
127 #define KSPREG (BFIN_CPU_STATE.ksp)
128 #define USPREG (BFIN_CPU_STATE.usp)
129 #define SEQSTATREG (BFIN_CPU_STATE.seqstat)
130 #define SYSCFGREG (BFIN_CPU_STATE.syscfg)
131 #define RETSREG (BFIN_CPU_STATE.rets)
132 #define RETIREG (BFIN_CPU_STATE.reti)
133 #define RETXREG (BFIN_CPU_STATE.retx)
134 #define RETNREG (BFIN_CPU_STATE.retn)
135 #define RETEREG (BFIN_CPU_STATE.rete)
136 #define PCREG (BFIN_CPU_STATE.pc)
137 #define EMUDAT_INREG (BFIN_CPU_STATE.emudat[0])
138 #define EMUDAT_OUTREG (BFIN_CPU_STATE.emudat[1])
139 #define INSN_LEN (BFIN_CPU_STATE.insn_len)
140 #define PARALLEL_GROUP (BFIN_CPU_STATE.group)
141 #define CYCLE_DELAY (BFIN_CPU_STATE.cycle_delay)
142 #define DIS_ALGN_EXPT (BFIN_CPU_STATE.dis_algn_expt)
144 #define EXCAUSE_SHIFT 0
145 #define EXCAUSE_MASK (0x3f << EXCAUSE_SHIFT)
146 #define EXCAUSE ((SEQSTATREG & EXCAUSE_MASK) >> EXCAUSE_SHIFT)
147 #define HWERRCAUSE_SHIFT 14
148 #define HWERRCAUSE_MASK (0x1f << HWERRCAUSE_SHIFT)
149 #define HWERRCAUSE ((SEQSTATREG & HWERRCAUSE_MASK) >> HWERRCAUSE_SHIFT)
151 #define _SET_CORE32REG_IDX(reg, p, x, val) \
154 TRACE_REGISTER (cpu, "wrote "#p"%i = %#x", x, __v); \
157 #define SET_DREG(x, val) _SET_CORE32REG_IDX (DREG (x), R, x, val)
158 #define SET_PREG(x, val) _SET_CORE32REG_IDX (PREG (x), P, x, val)
159 #define SET_IREG(x, val) _SET_CORE32REG_IDX (IREG (x), I, x, val)
160 #define SET_MREG(x, val) _SET_CORE32REG_IDX (MREG (x), M, x, val)
161 #define SET_BREG(x, val) _SET_CORE32REG_IDX (BREG (x), B, x, val)
162 #define SET_LREG(x, val) _SET_CORE32REG_IDX (LREG (x), L, x, val)
163 #define SET_LCREG(x, val) _SET_CORE32REG_IDX (LCREG (x), LC, x, val)
164 #define SET_LTREG(x, val) _SET_CORE32REG_IDX (LTREG (x), LT, x, val)
165 #define SET_LBREG(x, val) _SET_CORE32REG_IDX (LBREG (x), LB, x, val)
167 #define SET_DREG_L_H(x, l, h) SET_DREG (x, REG_H_L (h, l))
168 #define SET_DREG_L(x, l) SET_DREG (x, REG_H_L (DREG (x), l))
169 #define SET_DREG_H(x, h) SET_DREG (x, REG_H_L (h, DREG (x)))
171 #define _SET_CORE32REG_ALU(reg, p, x, val) \
174 TRACE_REGISTER (cpu, "wrote A%i"#p" = %#x", x, __v); \
177 #define SET_AXREG(x, val) _SET_CORE32REG_ALU (AXREG (x), X, x, val)
178 #define SET_AWREG(x, val) _SET_CORE32REG_ALU (AWREG (x), W, x, val)
180 #define SET_AREG(x, val) \
183 SET_AXREG (x, (__a >> 32) & 0xff); \
184 SET_AWREG (x, __a); \
186 #define SET_AREG32(x, val) \
188 SET_AWREG (x, val); \
189 SET_AXREG (x, -(AWREG (x) >> 31)); \
192 #define _SET_CORE32REG(reg, val) \
195 TRACE_REGISTER (cpu, "wrote "#reg" = %#x", __v); \
198 #define SET_FPREG(val) _SET_CORE32REG (FP, val)
199 #define SET_SPREG(val) _SET_CORE32REG (SP, val)
200 #define SET_CYCLESREG(val) _SET_CORE32REG (CYCLES, val)
201 #define SET_CYCLES2REG(val) _SET_CORE32REG (CYCLES2, val)
202 #define SET_CYCLES2SHDREG(val) _SET_CORE32REG (CYCLES2SHD, val)
203 #define SET_KSPREG(val) _SET_CORE32REG (KSP, val)
204 #define SET_USPREG(val) _SET_CORE32REG (USP, val)
205 #define SET_SYSCFGREG(val) _SET_CORE32REG (SYSCFG, val)
206 #define SET_RETSREG(val) _SET_CORE32REG (RETS, val)
207 #define SET_RETIREG(val) _SET_CORE32REG (RETI, val)
208 #define SET_RETXREG(val) _SET_CORE32REG (RETX, val)
209 #define SET_RETNREG(val) _SET_CORE32REG (RETN, val)
210 #define SET_RETEREG(val) _SET_CORE32REG (RETE, val)
211 #define SET_PCREG(val) _SET_CORE32REG (PC, val)
213 #define _SET_CORE32REGFIELD(reg, field, val, mask, shift) \
216 bu32 __v = ((reg##REG) & ~(mask)) | (__f << (shift)); \
217 TRACE_REGISTER (cpu, "wrote "#field" = %#x ("#reg" = %#x)", __f, __v); \
220 #define SET_SEQSTATREG(val) _SET_CORE32REG (SEQSTAT, val)
221 #define SET_EXCAUSE(excp) _SET_CORE32REGFIELD (SEQSTAT, EXCAUSE, excp, EXCAUSE_MASK, EXCAUSE_SHIFT)
222 #define SET_HWERRCAUSE(hwerr) _SET_CORE32REGFIELD (SEQSTAT, HWERRCAUSE, hwerr, HWERRCAUSE_MASK, HWERRCAUSE_SHIFT)
226 #define AC0_COPY_BIT 2
230 #define RND_MOD_BIT 8
239 #define ASTAT_DEFINED_BITS \
240 ((1 << AZ_BIT) | (1 << AN_BIT) | (1 << AC0_COPY_BIT) | (1 << V_COPY_BIT) \
241 |(1 << CC_BIT) | (1 << AQ_BIT) \
242 |(1 << RND_MOD_BIT) \
243 |(1 << AC0_BIT) | (1 << AC1_BIT) \
244 |(1 << AV0_BIT) | (1 << AV0S_BIT) | (1 << AV1_BIT) | (1 << AV1S_BIT) \
245 |(1 << V_BIT) | (1 << VS_BIT))
247 #define ASTATREG(field) (BFIN_CPU_STATE.field)
248 #define ASTAT_DEPOSIT(field, bit) (ASTATREG(field) << (bit))
250 (ASTAT_DEPOSIT(az, AZ_BIT) \
251 |ASTAT_DEPOSIT(an, AN_BIT) \
252 |ASTAT_DEPOSIT(ac0_copy, AC0_COPY_BIT) \
253 |ASTAT_DEPOSIT(v_copy, V_COPY_BIT) \
254 |ASTAT_DEPOSIT(cc, CC_BIT) \
255 |ASTAT_DEPOSIT(aq, AQ_BIT) \
256 |ASTAT_DEPOSIT(rnd_mod, RND_MOD_BIT) \
257 |ASTAT_DEPOSIT(ac0, AC0_BIT) \
258 |ASTAT_DEPOSIT(ac1, AC1_BIT) \
259 |ASTAT_DEPOSIT(av0, AV0_BIT) \
260 |ASTAT_DEPOSIT(av0s, AV0S_BIT) \
261 |ASTAT_DEPOSIT(av1, AV1_BIT) \
262 |ASTAT_DEPOSIT(av1s, AV1S_BIT) \
263 |ASTAT_DEPOSIT(v, V_BIT) \
264 |ASTAT_DEPOSIT(vs, VS_BIT) \
265 |ASTATREG(astat_reserved))
267 #define ASTAT_EXTRACT(a, bit) (((a) >> bit) & 1)
268 #define _SET_ASTAT(a, field, bit) (ASTATREG(field) = ASTAT_EXTRACT(a, bit))
269 #define SET_ASTAT(a) \
271 TRACE_REGISTER (cpu, "wrote ASTAT = %#x", a); \
272 _SET_ASTAT(a, az, AZ_BIT); \
273 _SET_ASTAT(a, an, AN_BIT); \
274 _SET_ASTAT(a, ac0_copy, AC0_COPY_BIT); \
275 _SET_ASTAT(a, v_copy, V_COPY_BIT); \
276 _SET_ASTAT(a, cc, CC_BIT); \
277 _SET_ASTAT(a, aq, AQ_BIT); \
278 _SET_ASTAT(a, rnd_mod, RND_MOD_BIT); \
279 _SET_ASTAT(a, ac0, AC0_BIT); \
280 _SET_ASTAT(a, ac1, AC1_BIT); \
281 _SET_ASTAT(a, av0, AV0_BIT); \
282 _SET_ASTAT(a, av0s, AV0S_BIT); \
283 _SET_ASTAT(a, av1, AV1_BIT); \
284 _SET_ASTAT(a, av1s, AV1S_BIT); \
285 _SET_ASTAT(a, v, V_BIT); \
286 _SET_ASTAT(a, vs, VS_BIT); \
287 ASTATREG(astat_reserved) = (a) & ~ASTAT_DEFINED_BITS; \
289 #define SET_ASTATREG(field, val) \
292 TRACE_REGISTER (cpu, "wrote ASTAT["#field"] = %i", __v); \
293 ASTATREG (field) = __v; \
294 if (&ASTATREG (field) == &ASTATREG (ac0)) \
296 TRACE_REGISTER (cpu, "wrote ASTAT["#field"_copy] = %i", __v); \
297 ASTATREG (ac0_copy) = __v; \
299 else if (&ASTATREG (field) == &ASTATREG (v)) \
301 TRACE_REGISTER (cpu, "wrote ASTAT["#field"_copy] = %i", __v); \
302 ASTATREG (v_copy) = __v; \
305 #define SET_CCREG(val) SET_ASTATREG (cc, val)
307 #define SYSCFG_SSSTEP (1 << 0)
308 #define SYSCFG_CCEN (1 << 1)
309 #define SYSCFG_SNEN (1 << 2)
311 #define __PUT_MEM(taddr, v, size) \
313 bu##size __v = (v); \
314 bu32 __taddr = (taddr); \
315 int __cnt, __bytes = size / 8; \
316 mmu_check_addr (cpu, __taddr, true, false, __bytes); \
317 __cnt = sim_core_write_buffer (CPU_STATE(cpu), cpu, write_map, \
318 (void *)&__v, __taddr, __bytes); \
319 if (__cnt != __bytes) \
320 mmu_process_fault (cpu, __taddr, true, false, false, true); \
321 BFIN_TRACE_CORE (cpu, __taddr, __bytes, write_map, __v); \
323 #define PUT_BYTE(taddr, v) __PUT_MEM(taddr, v, 8)
324 #define PUT_WORD(taddr, v) __PUT_MEM(taddr, v, 16)
325 #define PUT_LONG(taddr, v) __PUT_MEM(taddr, v, 32)
327 #define __GET_MEM(taddr, size, inst, map) \
330 bu32 __taddr = (taddr); \
331 int __cnt, __bytes = size / 8; \
332 mmu_check_addr (cpu, __taddr, false, inst, __bytes); \
333 __cnt = sim_core_read_buffer (CPU_STATE(cpu), cpu, map, \
334 (void *)&__ret, __taddr, __bytes); \
335 if (__cnt != __bytes) \
336 mmu_process_fault (cpu, __taddr, false, inst, false, true); \
337 BFIN_TRACE_CORE (cpu, __taddr, __bytes, map, __ret); \
340 #define _GET_MEM(taddr, size) __GET_MEM(taddr, size, false, read_map)
341 #define GET_BYTE(taddr) _GET_MEM(taddr, 8)
342 #define GET_WORD(taddr) _GET_MEM(taddr, 16)
343 #define GET_LONG(taddr) _GET_MEM(taddr, 32)
345 #define IFETCH(taddr) __GET_MEM(taddr, 16, true, exec_map)
346 #define IFETCH_CHECK(taddr) mmu_check_addr (cpu, taddr, false, true, 2)
348 extern void bfin_syscall (SIM_CPU *);
349 extern bu32 interp_insn_bfin (SIM_CPU *, bu32);
350 extern bu32 hwloop_get_next_pc (SIM_CPU *, bu32, bu32);
352 /* Defines for Blackfin memory layouts. */
353 #define BFIN_ASYNC_BASE 0x20000000
354 #define BFIN_SYSTEM_MMR_BASE 0xFFC00000
355 #define BFIN_CORE_MMR_BASE 0xFFE00000
356 #define BFIN_L1_SRAM_SCRATCH 0xFFB00000
357 #define BFIN_L1_SRAM_SCRATCH_SIZE 0x1000
358 #define BFIN_L1_SRAM_SCRATCH_END (BFIN_L1_SRAM_SCRATCH + BFIN_L1_SRAM_SCRATCH_SIZE)
360 #define BFIN_L1_CACHE_BYTES 32