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Merge branch 'upstream-merge' into next
[qemu/qemu-dev-zwu.git] / target-arm / helper.c
blobf4d12aab55dcdbba2b6751b2d47654dad608608f
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4
5 #include "cpu.h"
6 #include "gdbstub.h"
7 #include "helper.h"
8 #include "qemu-common.h"
9 #include "host-utils.h"
10 #if !defined(CONFIG_USER_ONLY)
11 #include "hw/loader.h"
12 #endif
13
14 static uint32_t cortexa9_cp15_c0_c1[8] =
15 { 0x1031, 0x11, 0x000, 0, 0x00100103, 0x20000000, 0x01230000, 0x00002111 };
16
17 static uint32_t cortexa9_cp15_c0_c2[8] =
18 { 0x00101111, 0x13112111, 0x21232041, 0x11112131, 0x00111142, 0, 0, 0 };
19
20 static uint32_t cortexa8_cp15_c0_c1[8] =
21 { 0x1031, 0x11, 0x400, 0, 0x31100003, 0x20000000, 0x01202000, 0x11 };
22
23 static uint32_t cortexa8_cp15_c0_c2[8] =
24 { 0x00101111, 0x12112111, 0x21232031, 0x11112131, 0x00111142, 0, 0, 0 };
25
26 static uint32_t mpcore_cp15_c0_c1[8] =
27 { 0x111, 0x1, 0, 0x2, 0x01100103, 0x10020302, 0x01222000, 0 };
28
29 static uint32_t mpcore_cp15_c0_c2[8] =
30 { 0x00100011, 0x12002111, 0x11221011, 0x01102131, 0x141, 0, 0, 0 };
31
32 static uint32_t arm1136_cp15_c0_c1[8] =
33 { 0x111, 0x1, 0x2, 0x3, 0x01130003, 0x10030302, 0x01222110, 0 };
34
35 static uint32_t arm1136_cp15_c0_c2[8] =
36 { 0x00140011, 0x12002111, 0x11231111, 0x01102131, 0x141, 0, 0, 0 };
37
38 static uint32_t cpu_arm_find_by_name(const char *name);
39
40 static inline void set_feature(CPUARMState *env, int feature)
41 {
42 env->features |= 1u << feature;
43 }
44
45 static void cpu_reset_model_id(CPUARMState *env, uint32_t id)
46 {
47 env->cp15.c0_cpuid = id;
48 switch (id) {
49 case ARM_CPUID_ARM926:
50 set_feature(env, ARM_FEATURE_V4T);
51 set_feature(env, ARM_FEATURE_V5);
52 set_feature(env, ARM_FEATURE_VFP);
53 env->vfp.xregs[ARM_VFP_FPSID] = 0x41011090;
54 env->cp15.c0_cachetype = 0x1dd20d2;
55 env->cp15.c1_sys = 0x00090078;
56 break;
57 case ARM_CPUID_ARM946:
58 set_feature(env, ARM_FEATURE_V4T);
59 set_feature(env, ARM_FEATURE_V5);
60 set_feature(env, ARM_FEATURE_MPU);
61 env->cp15.c0_cachetype = 0x0f004006;
62 env->cp15.c1_sys = 0x00000078;
63 break;
64 case ARM_CPUID_ARM1026:
65 set_feature(env, ARM_FEATURE_V4T);
66 set_feature(env, ARM_FEATURE_V5);
67 set_feature(env, ARM_FEATURE_VFP);
68 set_feature(env, ARM_FEATURE_AUXCR);
69 env->vfp.xregs[ARM_VFP_FPSID] = 0x410110a0;
70 env->cp15.c0_cachetype = 0x1dd20d2;
71 env->cp15.c1_sys = 0x00090078;
72 break;
73 case ARM_CPUID_ARM1136_R2:
74 case ARM_CPUID_ARM1136:
75 set_feature(env, ARM_FEATURE_V4T);
76 set_feature(env, ARM_FEATURE_V5);
77 set_feature(env, ARM_FEATURE_V6);
78 set_feature(env, ARM_FEATURE_VFP);
79 set_feature(env, ARM_FEATURE_AUXCR);
80 env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
81 env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
82 env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
83 memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c1, 8 * sizeof(uint32_t));
84 memcpy(env->cp15.c0_c2, arm1136_cp15_c0_c2, 8 * sizeof(uint32_t));
85 env->cp15.c0_cachetype = 0x1dd20d2;
86 env->cp15.c1_sys = 0x00050078;
87 break;
88 case ARM_CPUID_ARM11MPCORE:
89 set_feature(env, ARM_FEATURE_V4T);
90 set_feature(env, ARM_FEATURE_V5);
91 set_feature(env, ARM_FEATURE_V6);
92 set_feature(env, ARM_FEATURE_V6K);
93 set_feature(env, ARM_FEATURE_VFP);
94 set_feature(env, ARM_FEATURE_AUXCR);
95 env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
96 env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
97 env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
98 memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c1, 8 * sizeof(uint32_t));
99 memcpy(env->cp15.c0_c2, mpcore_cp15_c0_c2, 8 * sizeof(uint32_t));
100 env->cp15.c0_cachetype = 0x1dd20d2;
101 break;
102 case ARM_CPUID_CORTEXA8:
103 set_feature(env, ARM_FEATURE_V4T);
104 set_feature(env, ARM_FEATURE_V5);
105 set_feature(env, ARM_FEATURE_V6);
106 set_feature(env, ARM_FEATURE_V6K);
107 set_feature(env, ARM_FEATURE_V7);
108 set_feature(env, ARM_FEATURE_AUXCR);
109 set_feature(env, ARM_FEATURE_THUMB2);
110 set_feature(env, ARM_FEATURE_VFP);
111 set_feature(env, ARM_FEATURE_VFP3);
112 set_feature(env, ARM_FEATURE_NEON);
113 set_feature(env, ARM_FEATURE_THUMB2EE);
114 env->vfp.xregs[ARM_VFP_FPSID] = 0x410330c0;
115 env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222;
116 env->vfp.xregs[ARM_VFP_MVFR1] = 0x00011100;
117 memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c1, 8 * sizeof(uint32_t));
118 memcpy(env->cp15.c0_c2, cortexa8_cp15_c0_c2, 8 * sizeof(uint32_t));
119 env->cp15.c0_cachetype = 0x82048004;
120 env->cp15.c0_clid = (1 << 27) | (2 << 24) | 3;
121 env->cp15.c0_ccsid[0] = 0xe007e01a; /* 16k L1 dcache. */
122 env->cp15.c0_ccsid[1] = 0x2007e01a; /* 16k L1 icache. */
123 env->cp15.c0_ccsid[2] = 0xf0000000; /* No L2 icache. */
124 env->cp15.c1_sys = 0x00c50078;
125 break;
126 case ARM_CPUID_CORTEXA9:
127 set_feature(env, ARM_FEATURE_V4T);
128 set_feature(env, ARM_FEATURE_V5);
129 set_feature(env, ARM_FEATURE_V6);
130 set_feature(env, ARM_FEATURE_V6K);
131 set_feature(env, ARM_FEATURE_V7);
132 set_feature(env, ARM_FEATURE_AUXCR);
133 set_feature(env, ARM_FEATURE_THUMB2);
134 set_feature(env, ARM_FEATURE_VFP);
135 set_feature(env, ARM_FEATURE_VFP3);
136 set_feature(env, ARM_FEATURE_VFP_FP16);
137 set_feature(env, ARM_FEATURE_NEON);
138 set_feature(env, ARM_FEATURE_THUMB2EE);
139 /* Note that A9 supports the MP extensions even for
140 * A9UP and single-core A9MP (which are both different
141 * and valid configurations; we don't model A9UP).
142 */
143 set_feature(env, ARM_FEATURE_V7MP);
144 env->vfp.xregs[ARM_VFP_FPSID] = 0x41034000; /* Guess */
145 env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222;
146 env->vfp.xregs[ARM_VFP_MVFR1] = 0x01111111;
147 memcpy(env->cp15.c0_c1, cortexa9_cp15_c0_c1, 8 * sizeof(uint32_t));
148 memcpy(env->cp15.c0_c2, cortexa9_cp15_c0_c2, 8 * sizeof(uint32_t));
149 env->cp15.c0_cachetype = 0x80038003;
150 env->cp15.c0_clid = (1 << 27) | (1 << 24) | 3;
151 env->cp15.c0_ccsid[0] = 0xe00fe015; /* 16k L1 dcache. */
152 env->cp15.c0_ccsid[1] = 0x200fe015; /* 16k L1 icache. */
153 env->cp15.c1_sys = 0x00c50078;
154 break;
155 case ARM_CPUID_CORTEXM3:
156 set_feature(env, ARM_FEATURE_V4T);
157 set_feature(env, ARM_FEATURE_V5);
158 set_feature(env, ARM_FEATURE_V6);
159 set_feature(env, ARM_FEATURE_THUMB2);
160 set_feature(env, ARM_FEATURE_V7);
161 set_feature(env, ARM_FEATURE_M);
162 set_feature(env, ARM_FEATURE_DIV);
163 break;
164 case ARM_CPUID_ANY: /* For userspace emulation. */
165 set_feature(env, ARM_FEATURE_V4T);
166 set_feature(env, ARM_FEATURE_V5);
167 set_feature(env, ARM_FEATURE_V6);
168 set_feature(env, ARM_FEATURE_V6K);
169 set_feature(env, ARM_FEATURE_V7);
170 set_feature(env, ARM_FEATURE_THUMB2);
171 set_feature(env, ARM_FEATURE_VFP);
172 set_feature(env, ARM_FEATURE_VFP3);
173 set_feature(env, ARM_FEATURE_VFP_FP16);
174 set_feature(env, ARM_FEATURE_NEON);
175 set_feature(env, ARM_FEATURE_THUMB2EE);
176 set_feature(env, ARM_FEATURE_DIV);
177 set_feature(env, ARM_FEATURE_V7MP);
178 break;
179 case ARM_CPUID_TI915T:
180 case ARM_CPUID_TI925T:
181 set_feature(env, ARM_FEATURE_V4T);
182 set_feature(env, ARM_FEATURE_OMAPCP);
183 env->cp15.c0_cpuid = ARM_CPUID_TI925T; /* Depends on wiring. */
184 env->cp15.c0_cachetype = 0x5109149;
185 env->cp15.c1_sys = 0x00000070;
186 env->cp15.c15_i_max = 0x000;
187 env->cp15.c15_i_min = 0xff0;
188 break;
189 case ARM_CPUID_PXA250:
190 case ARM_CPUID_PXA255:
191 case ARM_CPUID_PXA260:
192 case ARM_CPUID_PXA261:
193 case ARM_CPUID_PXA262:
194 set_feature(env, ARM_FEATURE_V4T);
195 set_feature(env, ARM_FEATURE_V5);
196 set_feature(env, ARM_FEATURE_XSCALE);
197 /* JTAG_ID is ((id << 28) | 0x09265013) */
198 env->cp15.c0_cachetype = 0xd172172;
199 env->cp15.c1_sys = 0x00000078;
200 break;
201 case ARM_CPUID_PXA270_A0:
202 case ARM_CPUID_PXA270_A1:
203 case ARM_CPUID_PXA270_B0:
204 case ARM_CPUID_PXA270_B1:
205 case ARM_CPUID_PXA270_C0:
206 case ARM_CPUID_PXA270_C5:
207 set_feature(env, ARM_FEATURE_V4T);
208 set_feature(env, ARM_FEATURE_V5);
209 set_feature(env, ARM_FEATURE_XSCALE);
210 /* JTAG_ID is ((id << 28) | 0x09265013) */
211 set_feature(env, ARM_FEATURE_IWMMXT);
212 env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q';
213 env->cp15.c0_cachetype = 0xd172172;
214 env->cp15.c1_sys = 0x00000078;
215 break;
216 case ARM_CPUID_SA1100:
217 case ARM_CPUID_SA1110:
218 set_feature(env, ARM_FEATURE_STRONGARM);
219 env->cp15.c1_sys = 0x00000070;
220 break;
221 default:
222 cpu_abort(env, "Bad CPU ID: %x\n", id);
223 break;
224 }
225 }
226
227 void cpu_reset(CPUARMState *env)
228 {
229 uint32_t id;
230
231 if (qemu_loglevel_mask(CPU_LOG_RESET)) {
232 qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
233 log_cpu_state(env, 0);
234 }
235
236 id = env->cp15.c0_cpuid;
237 memset(env, 0, offsetof(CPUARMState, breakpoints));
238 if (id)
239 cpu_reset_model_id(env, id);
240 #if defined (CONFIG_USER_ONLY)
241 env->uncached_cpsr = ARM_CPU_MODE_USR;
242 /* For user mode we must enable access to coprocessors */
243 env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30;
244 if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
245 env->cp15.c15_cpar = 3;
246 } else if (arm_feature(env, ARM_FEATURE_XSCALE)) {
247 env->cp15.c15_cpar = 1;
248 }
249 #else
250 /* SVC mode with interrupts disabled. */
251 env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I;
252 /* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is
253 clear at reset. Initial SP and PC are loaded from ROM. */
254 if (IS_M(env)) {
255 uint32_t pc;
256 uint8_t *rom;
257 env->uncached_cpsr &= ~CPSR_I;
258 rom = rom_ptr(0);
259 if (rom) {
260 /* We should really use ldl_phys here, in case the guest
261 modified flash and reset itself. However images
262 loaded via -kenrel have not been copied yet, so load the
263 values directly from there. */
264 env->regs[13] = ldl_p(rom);
265 pc = ldl_p(rom + 4);
266 env->thumb = pc & 1;
267 env->regs[15] = pc & ~1;
268 }
269 }
270 env->vfp.xregs[ARM_VFP_FPEXC] = 0;
271 env->cp15.c2_base_mask = 0xffffc000u;
272 #endif
273 set_flush_to_zero(1, &env->vfp.standard_fp_status);
274 set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status);
275 set_default_nan_mode(1, &env->vfp.standard_fp_status);
276 set_float_detect_tininess(float_tininess_before_rounding,
277 &env->vfp.fp_status);
278 set_float_detect_tininess(float_tininess_before_rounding,
279 &env->vfp.standard_fp_status);
280 tlb_flush(env, 1);
281 }
282
283 static int vfp_gdb_get_reg(CPUState *env, uint8_t *buf, int reg)
284 {
285 int nregs;
286
287 /* VFP data registers are always little-endian. */
288 nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
289 if (reg < nregs) {
290 stfq_le_p(buf, env->vfp.regs[reg]);
291 return 8;
292 }
293 if (arm_feature(env, ARM_FEATURE_NEON)) {
294 /* Aliases for Q regs. */
295 nregs += 16;
296 if (reg < nregs) {
297 stfq_le_p(buf, env->vfp.regs[(reg - 32) * 2]);
298 stfq_le_p(buf + 8, env->vfp.regs[(reg - 32) * 2 + 1]);
299 return 16;
300 }
301 }
302 switch (reg - nregs) {
303 case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4;
304 case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4;
305 case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4;
306 }
307 return 0;
308 }
309
310 static int vfp_gdb_set_reg(CPUState *env, uint8_t *buf, int reg)
311 {
312 int nregs;
313
314 nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
315 if (reg < nregs) {
316 env->vfp.regs[reg] = ldfq_le_p(buf);
317 return 8;
318 }
319 if (arm_feature(env, ARM_FEATURE_NEON)) {
320 nregs += 16;
321 if (reg < nregs) {
322 env->vfp.regs[(reg - 32) * 2] = ldfq_le_p(buf);
323 env->vfp.regs[(reg - 32) * 2 + 1] = ldfq_le_p(buf + 8);
324 return 16;
325 }
326 }
327 switch (reg - nregs) {
328 case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4;
329 case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4;
330 case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4;
331 }
332 return 0;
333 }
334
335 CPUARMState *cpu_arm_init(const char *cpu_model)
336 {
337 CPUARMState *env;
338 uint32_t id;
339 static int inited = 0;
340
341 id = cpu_arm_find_by_name(cpu_model);
342 if (id == 0)
343 return NULL;
344 env = qemu_mallocz(sizeof(CPUARMState));
345 cpu_exec_init(env);
346 if (!inited) {
347 inited = 1;
348 arm_translate_init();
349 }
350
351 env->cpu_model_str = cpu_model;
352 env->cp15.c0_cpuid = id;
353 cpu_reset(env);
354 if (arm_feature(env, ARM_FEATURE_NEON)) {
355 gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg,
356 51, "arm-neon.xml", 0);
357 } else if (arm_feature(env, ARM_FEATURE_VFP3)) {
358 gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg,
359 35, "arm-vfp3.xml", 0);
360 } else if (arm_feature(env, ARM_FEATURE_VFP)) {
361 gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg,
362 19, "arm-vfp.xml", 0);
363 }
364 qemu_init_vcpu(env);
365 return env;
366 }
367
368 struct arm_cpu_t {
369 uint32_t id;
370 const char *name;
371 };
372
373 static const struct arm_cpu_t arm_cpu_names[] = {
374 { ARM_CPUID_ARM926, "arm926"},
375 { ARM_CPUID_ARM946, "arm946"},
376 { ARM_CPUID_ARM1026, "arm1026"},
377 { ARM_CPUID_ARM1136, "arm1136"},
378 { ARM_CPUID_ARM1136_R2, "arm1136-r2"},
379 { ARM_CPUID_ARM11MPCORE, "arm11mpcore"},
380 { ARM_CPUID_CORTEXM3, "cortex-m3"},
381 { ARM_CPUID_CORTEXA8, "cortex-a8"},
382 { ARM_CPUID_CORTEXA9, "cortex-a9"},
383 { ARM_CPUID_TI925T, "ti925t" },
384 { ARM_CPUID_PXA250, "pxa250" },
385 { ARM_CPUID_SA1100, "sa1100" },
386 { ARM_CPUID_SA1110, "sa1110" },
387 { ARM_CPUID_PXA255, "pxa255" },
388 { ARM_CPUID_PXA260, "pxa260" },
389 { ARM_CPUID_PXA261, "pxa261" },
390 { ARM_CPUID_PXA262, "pxa262" },
391 { ARM_CPUID_PXA270, "pxa270" },
392 { ARM_CPUID_PXA270_A0, "pxa270-a0" },
393 { ARM_CPUID_PXA270_A1, "pxa270-a1" },
394 { ARM_CPUID_PXA270_B0, "pxa270-b0" },
395 { ARM_CPUID_PXA270_B1, "pxa270-b1" },
396 { ARM_CPUID_PXA270_C0, "pxa270-c0" },
397 { ARM_CPUID_PXA270_C5, "pxa270-c5" },
398 { ARM_CPUID_ANY, "any"},
399 { 0, NULL}
400 };
401
402 void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
403 {
404 int i;
405
406 (*cpu_fprintf)(f, "Available CPUs:\n");
407 for (i = 0; arm_cpu_names[i].name; i++) {
408 (*cpu_fprintf)(f, " %s\n", arm_cpu_names[i].name);
409 }
410 }
411
412 /* return 0 if not found */
413 static uint32_t cpu_arm_find_by_name(const char *name)
414 {
415 int i;
416 uint32_t id;
417
418 id = 0;
419 for (i = 0; arm_cpu_names[i].name; i++) {
420 if (strcmp(name, arm_cpu_names[i].name) == 0) {
421 id = arm_cpu_names[i].id;
422 break;
423 }
424 }
425 return id;
426 }
427
428 void cpu_arm_close(CPUARMState *env)
429 {
430 free(env);
431 }
432
433 uint32_t cpsr_read(CPUARMState *env)
434 {
435 int ZF;
436 ZF = (env->ZF == 0);
437 return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) |
438 (env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
439 | (env->thumb << 5) | ((env->condexec_bits & 3) << 25)
440 | ((env->condexec_bits & 0xfc) << 8)
441 | (env->GE << 16);
442 }
443
444 void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
445 {
446 if (mask & CPSR_NZCV) {
447 env->ZF = (~val) & CPSR_Z;
448 env->NF = val;
449 env->CF = (val >> 29) & 1;
450 env->VF = (val << 3) & 0x80000000;
451 }
452 if (mask & CPSR_Q)
453 env->QF = ((val & CPSR_Q) != 0);
454 if (mask & CPSR_T)
455 env->thumb = ((val & CPSR_T) != 0);
456 if (mask & CPSR_IT_0_1) {
457 env->condexec_bits &= ~3;
458 env->condexec_bits |= (val >> 25) & 3;
459 }
460 if (mask & CPSR_IT_2_7) {
461 env->condexec_bits &= 3;
462 env->condexec_bits |= (val >> 8) & 0xfc;
463 }
464 if (mask & CPSR_GE) {
465 env->GE = (val >> 16) & 0xf;
466 }
467
468 if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
469 switch_mode(env, val & CPSR_M);
470 }
471 mask &= ~CACHED_CPSR_BITS;
472 env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask);
473 }
474
475 /* Sign/zero extend */
476 uint32_t HELPER(sxtb16)(uint32_t x)
477 {
478 uint32_t res;
479 res = (uint16_t)(int8_t)x;
480 res |= (uint32_t)(int8_t)(x >> 16) << 16;
481 return res;
482 }
483
484 uint32_t HELPER(uxtb16)(uint32_t x)
485 {
486 uint32_t res;
487 res = (uint16_t)(uint8_t)x;
488 res |= (uint32_t)(uint8_t)(x >> 16) << 16;
489 return res;
490 }
491
492 uint32_t HELPER(clz)(uint32_t x)
493 {
494 return clz32(x);
495 }
496
497 int32_t HELPER(sdiv)(int32_t num, int32_t den)
498 {
499 if (den == 0)
500 return 0;
501 if (num == INT_MIN && den == -1)
502 return INT_MIN;
503 return num / den;
504 }
505
506 uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
507 {
508 if (den == 0)
509 return 0;
510 return num / den;
511 }
512
513 uint32_t HELPER(rbit)(uint32_t x)
514 {
515 x = ((x & 0xff000000) >> 24)
516 | ((x & 0x00ff0000) >> 8)
517 | ((x & 0x0000ff00) << 8)
518 | ((x & 0x000000ff) << 24);
519 x = ((x & 0xf0f0f0f0) >> 4)
520 | ((x & 0x0f0f0f0f) << 4);
521 x = ((x & 0x88888888) >> 3)
522 | ((x & 0x44444444) >> 1)
523 | ((x & 0x22222222) << 1)
524 | ((x & 0x11111111) << 3);
525 return x;
526 }
527
528 uint32_t HELPER(abs)(uint32_t x)
529 {
530 return ((int32_t)x < 0) ? -x : x;
531 }
532
533 #if defined(CONFIG_USER_ONLY)
534
535 void do_interrupt (CPUState *env)
536 {
537 env->exception_index = -1;
538 }
539
540 int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
541 int mmu_idx, int is_softmmu)
542 {
543 if (rw == 2) {
544 env->exception_index = EXCP_PREFETCH_ABORT;
545 env->cp15.c6_insn = address;
546 } else {
547 env->exception_index = EXCP_DATA_ABORT;
548 env->cp15.c6_data = address;
549 }
550 return 1;
551 }
552
553 /* These should probably raise undefined insn exceptions. */
554 void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
555 {
556 int op1 = (insn >> 8) & 0xf;
557 cpu_abort(env, "cp%i insn %08x\n", op1, insn);
558 return;
559 }
560
561 uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn)
562 {
563 int op1 = (insn >> 8) & 0xf;
564 cpu_abort(env, "cp%i insn %08x\n", op1, insn);
565 return 0;
566 }
567
568 void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
569 {
570 cpu_abort(env, "cp15 insn %08x\n", insn);
571 }
572
573 uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn)
574 {
575 cpu_abort(env, "cp15 insn %08x\n", insn);
576 }
577
578 /* These should probably raise undefined insn exceptions. */
579 void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
580 {
581 cpu_abort(env, "v7m_mrs %d\n", reg);
582 }
583
584 uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg)
585 {
586 cpu_abort(env, "v7m_mrs %d\n", reg);
587 return 0;
588 }
589
590 void switch_mode(CPUState *env, int mode)
591 {
592 if (mode != ARM_CPU_MODE_USR)
593 cpu_abort(env, "Tried to switch out of user mode\n");
594 }
595
596 void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
597 {
598 cpu_abort(env, "banked r13 write\n");
599 }
600
601 uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode)
602 {
603 cpu_abort(env, "banked r13 read\n");
604 return 0;
605 }
606
607 #else
608
609 extern int semihosting_enabled;
610
611 /* Map CPU modes onto saved register banks. */
612 static inline int bank_number (int mode)
613 {
614 switch (mode) {
615 case ARM_CPU_MODE_USR:
616 case ARM_CPU_MODE_SYS:
617 return 0;
618 case ARM_CPU_MODE_SVC:
619 return 1;
620 case ARM_CPU_MODE_ABT:
621 return 2;
622 case ARM_CPU_MODE_UND:
623 return 3;
624 case ARM_CPU_MODE_IRQ:
625 return 4;
626 case ARM_CPU_MODE_FIQ:
627 return 5;
628 }
629 cpu_abort(cpu_single_env, "Bad mode %x\n", mode);
630 return -1;
631 }
632
633 void switch_mode(CPUState *env, int mode)
634 {
635 int old_mode;
636 int i;
637
638 old_mode = env->uncached_cpsr & CPSR_M;
639 if (mode == old_mode)
640 return;
641
642 if (old_mode == ARM_CPU_MODE_FIQ) {
643 memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t));
644 memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t));
645 } else if (mode == ARM_CPU_MODE_FIQ) {
646 memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t));
647 memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
648 }
649
650 i = bank_number(old_mode);
651 env->banked_r13[i] = env->regs[13];
652 env->banked_r14[i] = env->regs[14];
653 env->banked_spsr[i] = env->spsr;
654
655 i = bank_number(mode);
656 env->regs[13] = env->banked_r13[i];
657 env->regs[14] = env->banked_r14[i];
658 env->spsr = env->banked_spsr[i];
659 }
660
661 static void v7m_push(CPUARMState *env, uint32_t val)
662 {
663 env->regs[13] -= 4;
664 stl_phys(env->regs[13], val);
665 }
666
667 static uint32_t v7m_pop(CPUARMState *env)
668 {
669 uint32_t val;
670 val = ldl_phys(env->regs[13]);
671 env->regs[13] += 4;
672 return val;
673 }
674
675 /* Switch to V7M main or process stack pointer. */
676 static void switch_v7m_sp(CPUARMState *env, int process)
677 {
678 uint32_t tmp;
679 if (env->v7m.current_sp != process) {
680 tmp = env->v7m.other_sp;
681 env->v7m.other_sp = env->regs[13];
682 env->regs[13] = tmp;
683 env->v7m.current_sp = process;
684 }
685 }
686
687 static void do_v7m_exception_exit(CPUARMState *env)
688 {
689 uint32_t type;
690 uint32_t xpsr;
691
692 type = env->regs[15];
693 if (env->v7m.exception != 0)
694 armv7m_nvic_complete_irq(env->nvic, env->v7m.exception);
695
696 /* Switch to the target stack. */
697 switch_v7m_sp(env, (type & 4) != 0);
698 /* Pop registers. */
699 env->regs[0] = v7m_pop(env);
700 env->regs[1] = v7m_pop(env);
701 env->regs[2] = v7m_pop(env);
702 env->regs[3] = v7m_pop(env);
703 env->regs[12] = v7m_pop(env);
704 env->regs[14] = v7m_pop(env);
705 env->regs[15] = v7m_pop(env);
706 xpsr = v7m_pop(env);
707 xpsr_write(env, xpsr, 0xfffffdff);
708 /* Undo stack alignment. */
709 if (xpsr & 0x200)
710 env->regs[13] |= 4;
711 /* ??? The exception return type specifies Thread/Handler mode. However
712 this is also implied by the xPSR value. Not sure what to do
713 if there is a mismatch. */
714 /* ??? Likewise for mismatches between the CONTROL register and the stack
715 pointer. */
716 }
717
718 static void do_interrupt_v7m(CPUARMState *env)
719 {
720 uint32_t xpsr = xpsr_read(env);
721 uint32_t lr;
722 uint32_t addr;
723
724 lr = 0xfffffff1;
725 if (env->v7m.current_sp)
726 lr |= 4;
727 if (env->v7m.exception == 0)
728 lr |= 8;
729
730 /* For exceptions we just mark as pending on the NVIC, and let that
731 handle it. */
732 /* TODO: Need to escalate if the current priority is higher than the
733 one we're raising. */
734 switch (env->exception_index) {
735 case EXCP_UDEF:
736 armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE);
737 return;
738 case EXCP_SWI:
739 env->regs[15] += 2;
740 armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC);
741 return;
742 case EXCP_PREFETCH_ABORT:
743 case EXCP_DATA_ABORT:
744 armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM);
745 return;
746 case EXCP_BKPT:
747 if (semihosting_enabled) {
748 int nr;
749 nr = lduw_code(env->regs[15]) & 0xff;
750 if (nr == 0xab) {
751 env->regs[15] += 2;
752 env->regs[0] = do_arm_semihosting(env);
753 return;
754 }
755 }
756 armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG);
757 return;
758 case EXCP_IRQ:
759 env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic);
760 break;
761 case EXCP_EXCEPTION_EXIT:
762 do_v7m_exception_exit(env);
763 return;
764 default:
765 cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
766 return; /* Never happens. Keep compiler happy. */
767 }
768
769 /* Align stack pointer. */
770 /* ??? Should only do this if Configuration Control Register
771 STACKALIGN bit is set. */
772 if (env->regs[13] & 4) {
773 env->regs[13] -= 4;
774 xpsr |= 0x200;
775 }
776 /* Switch to the handler mode. */
777 v7m_push(env, xpsr);
778 v7m_push(env, env->regs[15]);
779 v7m_push(env, env->regs[14]);
780 v7m_push(env, env->regs[12]);
781 v7m_push(env, env->regs[3]);
782 v7m_push(env, env->regs[2]);
783 v7m_push(env, env->regs[1]);
784 v7m_push(env, env->regs[0]);
785 switch_v7m_sp(env, 0);
786 env->uncached_cpsr &= ~CPSR_IT;
787 env->regs[14] = lr;
788 addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
789 env->regs[15] = addr & 0xfffffffe;
790 env->thumb = addr & 1;
791 }
792
793 /* Handle a CPU exception. */
794 void do_interrupt(CPUARMState *env)
795 {
796 uint32_t addr;
797 uint32_t mask;
798 int new_mode;
799 uint32_t offset;
800
801 if (IS_M(env)) {
802 do_interrupt_v7m(env);
803 return;
804 }
805 /* TODO: Vectored interrupt controller. */
806 switch (env->exception_index) {
807 case EXCP_UDEF:
808 new_mode = ARM_CPU_MODE_UND;
809 addr = 0x04;
810 mask = CPSR_I;
811 if (env->thumb)
812 offset = 2;
813 else
814 offset = 4;
815 break;
816 case EXCP_SWI:
817 if (semihosting_enabled) {
818 /* Check for semihosting interrupt. */
819 if (env->thumb) {
820 mask = lduw_code(env->regs[15] - 2) & 0xff;
821 } else {
822 mask = ldl_code(env->regs[15] - 4) & 0xffffff;
823 }
824 /* Only intercept calls from privileged modes, to provide some
825 semblance of security. */
826 if (((mask == 0x123456 && !env->thumb)
827 || (mask == 0xab && env->thumb))
828 && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
829 env->regs[0] = do_arm_semihosting(env);
830 return;
831 }
832 }
833 new_mode = ARM_CPU_MODE_SVC;
834 addr = 0x08;
835 mask = CPSR_I;
836 /* The PC already points to the next instruction. */
837 offset = 0;
838 break;
839 case EXCP_BKPT:
840 /* See if this is a semihosting syscall. */
841 if (env->thumb && semihosting_enabled) {
842 mask = lduw_code(env->regs[15]) & 0xff;
843 if (mask == 0xab
844 && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
845 env->regs[15] += 2;
846 env->regs[0] = do_arm_semihosting(env);
847 return;
848 }
849 }
850 env->cp15.c5_insn = 2;
851 /* Fall through to prefetch abort. */
852 case EXCP_PREFETCH_ABORT:
853 new_mode = ARM_CPU_MODE_ABT;
854 addr = 0x0c;
855 mask = CPSR_A | CPSR_I;
856 offset = 4;
857 break;
858 case EXCP_DATA_ABORT:
859 new_mode = ARM_CPU_MODE_ABT;
860 addr = 0x10;
861 mask = CPSR_A | CPSR_I;
862 offset = 8;
863 break;
864 case EXCP_IRQ:
865 new_mode = ARM_CPU_MODE_IRQ;
866 addr = 0x18;
867 /* Disable IRQ and imprecise data aborts. */
868 mask = CPSR_A | CPSR_I;
869 offset = 4;
870 break;
871 case EXCP_FIQ:
872 new_mode = ARM_CPU_MODE_FIQ;
873 addr = 0x1c;
874 /* Disable FIQ, IRQ and imprecise data aborts. */
875 mask = CPSR_A | CPSR_I | CPSR_F;
876 offset = 4;
877 break;
878 default:
879 cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
880 return; /* Never happens. Keep compiler happy. */
881 }
882 /* High vectors. */
883 if (env->cp15.c1_sys & (1 << 13)) {
884 addr += 0xffff0000;
885 }
886 switch_mode (env, new_mode);
887 env->spsr = cpsr_read(env);
888 /* Clear IT bits. */
889 env->condexec_bits = 0;
890 /* Switch to the new mode, and to the correct instruction set. */
891 env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
892 env->uncached_cpsr |= mask;
893 /* this is a lie, as the was no c1_sys on V4T/V5, but who cares
894 * and we should just guard the thumb mode on V4 */
895 if (arm_feature(env, ARM_FEATURE_V4T)) {
896 env->thumb = (env->cp15.c1_sys & (1 << 30)) != 0;
897 }
898 env->regs[14] = env->regs[15] + offset;
899 env->regs[15] = addr;
900 env->interrupt_request |= CPU_INTERRUPT_EXITTB;
901 }
902
903 /* Check section/page access permissions.
904 Returns the page protection flags, or zero if the access is not
905 permitted. */
906 static inline int check_ap(CPUState *env, int ap, int domain, int access_type,
907 int is_user)
908 {
909 int prot_ro;
910
911 if (domain == 3)
912 return PAGE_READ | PAGE_WRITE;
913
914 if (access_type == 1)
915 prot_ro = 0;
916 else
917 prot_ro = PAGE_READ;
918
919 switch (ap) {
920 case 0:
921 if (access_type == 1)
922 return 0;
923 switch ((env->cp15.c1_sys >> 8) & 3) {
924 case 1:
925 return is_user ? 0 : PAGE_READ;
926 case 2:
927 return PAGE_READ;
928 default:
929 return 0;
930 }
931 case 1:
932 return is_user ? 0 : PAGE_READ | PAGE_WRITE;
933 case 2:
934 if (is_user)
935 return prot_ro;
936 else
937 return PAGE_READ | PAGE_WRITE;
938 case 3:
939 return PAGE_READ | PAGE_WRITE;
940 case 4: /* Reserved. */
941 return 0;
942 case 5:
943 return is_user ? 0 : prot_ro;
944 case 6:
945 return prot_ro;
946 case 7:
947 if (!arm_feature (env, ARM_FEATURE_V7))
948 return 0;
949 return prot_ro;
950 default:
951 abort();
952 }
953 }
954
955 static uint32_t get_level1_table_address(CPUState *env, uint32_t address)
956 {
957 uint32_t table;
958
959 if (address & env->cp15.c2_mask)
960 table = env->cp15.c2_base1 & 0xffffc000;
961 else
962 table = env->cp15.c2_base0 & env->cp15.c2_base_mask;
963
964 table |= (address >> 18) & 0x3ffc;
965 return table;
966 }
967
968 static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type,
969 int is_user, uint32_t *phys_ptr, int *prot,
970 target_ulong *page_size)
971 {
972 int code;
973 uint32_t table;
974 uint32_t desc;
975 int type;
976 int ap;
977 int domain;
978 uint32_t phys_addr;
979
980 /* Pagetable walk. */
981 /* Lookup l1 descriptor. */
982 table = get_level1_table_address(env, address);
983 desc = ldl_phys(table);
984 type = (desc & 3);
985 domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3;
986 if (type == 0) {
987 /* Section translation fault. */
988 code = 5;
989 goto do_fault;
990 }
991 if (domain == 0 || domain == 2) {
992 if (type == 2)
993 code = 9; /* Section domain fault. */
994 else
995 code = 11; /* Page domain fault. */
996 goto do_fault;
997 }
998 if (type == 2) {
999 /* 1Mb section. */
1000 phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
1001 ap = (desc >> 10) & 3;
1002 code = 13;
1003 *page_size = 1024 * 1024;
1004 } else {
1005 /* Lookup l2 entry. */
1006 if (type == 1) {
1007 /* Coarse pagetable. */
1008 table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
1009 } else {
1010 /* Fine pagetable. */
1011 table = (desc & 0xfffff000) | ((address >> 8) & 0xffc);
1012 }
1013 desc = ldl_phys(table);
1014 switch (desc & 3) {
1015 case 0: /* Page translation fault. */
1016 code = 7;
1017 goto do_fault;
1018 case 1: /* 64k page. */
1019 phys_addr = (desc & 0xffff0000) | (address & 0xffff);
1020 ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
1021 *page_size = 0x10000;
1022 break;
1023 case 2: /* 4k page. */
1024 phys_addr = (desc & 0xfffff000) | (address & 0xfff);
1025 ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
1026 *page_size = 0x1000;
1027 break;
1028 case 3: /* 1k page. */
1029 if (type == 1) {
1030 if (arm_feature(env, ARM_FEATURE_XSCALE)) {
1031 phys_addr = (desc & 0xfffff000) | (address & 0xfff);
1032 } else {
1033 /* Page translation fault. */
1034 code = 7;
1035 goto do_fault;
1036 }
1037 } else {
1038 phys_addr = (desc & 0xfffffc00) | (address & 0x3ff);
1039 }
1040 ap = (desc >> 4) & 3;
1041 *page_size = 0x400;
1042 break;
1043 default:
1044 /* Never happens, but compiler isn't smart enough to tell. */
1045 abort();
1046 }
1047 code = 15;
1048 }
1049 *prot = check_ap(env, ap, domain, access_type, is_user);
1050 if (!*prot) {
1051 /* Access permission fault. */
1052 goto do_fault;
1053 }
1054 *prot |= PAGE_EXEC;
1055 *phys_ptr = phys_addr;
1056 return 0;
1057 do_fault:
1058 return code | (domain << 4);
1059 }
1060
1061 static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type,
1062 int is_user, uint32_t *phys_ptr, int *prot,
1063 target_ulong *page_size)
1064 {
1065 int code;
1066 uint32_t table;
1067 uint32_t desc;
1068 uint32_t xn;
1069 int type;
1070 int ap;
1071 int domain;
1072 uint32_t phys_addr;
1073
1074 /* Pagetable walk. */
1075 /* Lookup l1 descriptor. */
1076 table = get_level1_table_address(env, address);
1077 desc = ldl_phys(table);
1078 type = (desc & 3);
1079 if (type == 0) {
1080 /* Section translation fault. */
1081 code = 5;
1082 domain = 0;
1083 goto do_fault;
1084 } else if (type == 2 && (desc & (1 << 18))) {
1085 /* Supersection. */
1086 domain = 0;
1087 } else {
1088 /* Section or page. */
1089 domain = (desc >> 4) & 0x1e;
1090 }
1091 domain = (env->cp15.c3 >> domain) & 3;
1092 if (domain == 0 || domain == 2) {
1093 if (type == 2)
1094 code = 9; /* Section domain fault. */
1095 else
1096 code = 11; /* Page domain fault. */
1097 goto do_fault;
1098 }
1099 if (type == 2) {
1100 if (desc & (1 << 18)) {
1101 /* Supersection. */
1102 phys_addr = (desc & 0xff000000) | (address & 0x00ffffff);
1103 *page_size = 0x1000000;
1104 } else {
1105 /* Section. */
1106 phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
1107 *page_size = 0x100000;
1108 }
1109 ap = ((desc >> 10) & 3) | ((desc >> 13) & 4);
1110 xn = desc & (1 << 4);
1111 code = 13;
1112 } else {
1113 /* Lookup l2 entry. */
1114 table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
1115 desc = ldl_phys(table);
1116 ap = ((desc >> 4) & 3) | ((desc >> 7) & 4);
1117 switch (desc & 3) {
1118 case 0: /* Page translation fault. */
1119 code = 7;
1120 goto do_fault;
1121 case 1: /* 64k page. */
1122 phys_addr = (desc & 0xffff0000) | (address & 0xffff);
1123 xn = desc & (1 << 15);
1124 *page_size = 0x10000;
1125 break;
1126 case 2: case 3: /* 4k page. */
1127 phys_addr = (desc & 0xfffff000) | (address & 0xfff);
1128 xn = desc & 1;
1129 *page_size = 0x1000;
1130 break;
1131 default:
1132 /* Never happens, but compiler isn't smart enough to tell. */
1133 abort();
1134 }
1135 code = 15;
1136 }
1137 if (domain == 3) {
1138 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
1139 } else {
1140 if (xn && access_type == 2)
1141 goto do_fault;
1142
1143 /* The simplified model uses AP[0] as an access control bit. */
1144 if ((env->cp15.c1_sys & (1 << 29)) && (ap & 1) == 0) {
1145 /* Access flag fault. */
1146 code = (code == 15) ? 6 : 3;
1147 goto do_fault;
1148 }
1149 *prot = check_ap(env, ap, domain, access_type, is_user);
1150 if (!*prot) {
1151 /* Access permission fault. */
1152 goto do_fault;
1153 }
1154 if (!xn) {
1155 *prot |= PAGE_EXEC;
1156 }
1157 }
1158 *phys_ptr = phys_addr;
1159 return 0;
1160 do_fault:
1161 return code | (domain << 4);
1162 }
1163
1164 static int get_phys_addr_mpu(CPUState *env, uint32_t address, int access_type,
1165 int is_user, uint32_t *phys_ptr, int *prot)
1166 {
1167 int n;
1168 uint32_t mask;
1169 uint32_t base;
1170
1171 *phys_ptr = address;
1172 for (n = 7; n >= 0; n--) {
1173 base = env->cp15.c6_region[n];
1174 if ((base & 1) == 0)
1175 continue;
1176 mask = 1 << ((base >> 1) & 0x1f);
1177 /* Keep this shift separate from the above to avoid an
1178 (undefined) << 32. */
1179 mask = (mask << 1) - 1;
1180 if (((base ^ address) & ~mask) == 0)
1181 break;
1182 }
1183 if (n < 0)
1184 return 2;
1185
1186 if (access_type == 2) {
1187 mask = env->cp15.c5_insn;
1188 } else {
1189 mask = env->cp15.c5_data;
1190 }
1191 mask = (mask >> (n * 4)) & 0xf;
1192 switch (mask) {
1193 case 0:
1194 return 1;
1195 case 1:
1196 if (is_user)
1197 return 1;
1198 *prot = PAGE_READ | PAGE_WRITE;
1199 break;
1200 case 2:
1201 *prot = PAGE_READ;
1202 if (!is_user)
1203 *prot |= PAGE_WRITE;
1204 break;
1205 case 3:
1206 *prot = PAGE_READ | PAGE_WRITE;
1207 break;
1208 case 5:
1209 if (is_user)
1210 return 1;
1211 *prot = PAGE_READ;
1212 break;
1213 case 6:
1214 *prot = PAGE_READ;
1215 break;
1216 default:
1217 /* Bad permission. */
1218 return 1;
1219 }
1220 *prot |= PAGE_EXEC;
1221 return 0;
1222 }
1223
1224 static inline int get_phys_addr(CPUState *env, uint32_t address,
1225 int access_type, int is_user,
1226 uint32_t *phys_ptr, int *prot,
1227 target_ulong *page_size)
1228 {
1229 /* Fast Context Switch Extension. */
1230 if (address < 0x02000000)
1231 address += env->cp15.c13_fcse;
1232
1233 if ((env->cp15.c1_sys & 1) == 0) {
1234 /* MMU/MPU disabled. */
1235 *phys_ptr = address;
1236 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
1237 *page_size = TARGET_PAGE_SIZE;
1238 return 0;
1239 } else if (arm_feature(env, ARM_FEATURE_MPU)) {
1240 *page_size = TARGET_PAGE_SIZE;
1241 return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
1242 prot);
1243 } else if (env->cp15.c1_sys & (1 << 23)) {
1244 return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
1245 prot, page_size);
1246 } else {
1247 return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
1248 prot, page_size);
1249 }
1250 }
1251
1252 int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address,
1253 int access_type, int mmu_idx, int is_softmmu)
1254 {
1255 uint32_t phys_addr;
1256 target_ulong page_size;
1257 int prot;
1258 int ret, is_user;
1259
1260 is_user = mmu_idx == MMU_USER_IDX;
1261 ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot,
1262 &page_size);
1263 if (ret == 0) {
1264 /* Map a single [sub]page. */
1265 phys_addr &= ~(uint32_t)0x3ff;
1266 address &= ~(uint32_t)0x3ff;
1267 tlb_set_page (env, address, phys_addr, prot, mmu_idx, page_size);
1268 return 0;
1269 }
1270
1271 if (access_type == 2) {
1272 env->cp15.c5_insn = ret;
1273 env->cp15.c6_insn = address;
1274 env->exception_index = EXCP_PREFETCH_ABORT;
1275 } else {
1276 env->cp15.c5_data = ret;
1277 if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6))
1278 env->cp15.c5_data |= (1 << 11);
1279 env->cp15.c6_data = address;
1280 env->exception_index = EXCP_DATA_ABORT;
1281 }
1282 return 1;
1283 }
1284
1285 target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
1286 {
1287 uint32_t phys_addr;
1288 target_ulong page_size;
1289 int prot;
1290 int ret;
1291
1292 ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot, &page_size);
1293
1294 if (ret != 0)
1295 return -1;
1296
1297 return phys_addr;
1298 }
1299
1300 void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
1301 {
1302 int cp_num = (insn >> 8) & 0xf;
1303 int cp_info = (insn >> 5) & 7;
1304 int src = (insn >> 16) & 0xf;
1305 int operand = insn & 0xf;
1306
1307 if (env->cp[cp_num].cp_write)
1308 env->cp[cp_num].cp_write(env->cp[cp_num].opaque,
1309 cp_info, src, operand, val);
1310 }
1311
1312 uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn)
1313 {
1314 int cp_num = (insn >> 8) & 0xf;
1315 int cp_info = (insn >> 5) & 7;
1316 int dest = (insn >> 16) & 0xf;
1317 int operand = insn & 0xf;
1318
1319 if (env->cp[cp_num].cp_read)
1320 return env->cp[cp_num].cp_read(env->cp[cp_num].opaque,
1321 cp_info, dest, operand);
1322 return 0;
1323 }
1324
1325 /* Return basic MPU access permission bits. */
1326 static uint32_t simple_mpu_ap_bits(uint32_t val)
1327 {
1328 uint32_t ret;
1329 uint32_t mask;
1330 int i;
1331 ret = 0;
1332 mask = 3;
1333 for (i = 0; i < 16; i += 2) {
1334 ret |= (val >> i) & mask;
1335 mask <<= 2;
1336 }
1337 return ret;
1338 }
1339
1340 /* Pad basic MPU access permission bits to extended format. */
1341 static uint32_t extended_mpu_ap_bits(uint32_t val)
1342 {
1343 uint32_t ret;
1344 uint32_t mask;
1345 int i;
1346 ret = 0;
1347 mask = 3;
1348 for (i = 0; i < 16; i += 2) {
1349 ret |= (val & mask) << i;
1350 mask <<= 2;
1351 }
1352 return ret;
1353 }
1354
1355 void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
1356 {
1357 int op1;
1358 int op2;
1359 int crm;
1360
1361 op1 = (insn >> 21) & 7;
1362 op2 = (insn >> 5) & 7;
1363 crm = insn & 0xf;
1364 switch ((insn >> 16) & 0xf) {
1365 case 0:
1366 /* ID codes. */
1367 if (arm_feature(env, ARM_FEATURE_XSCALE))
1368 break;
1369 if (arm_feature(env, ARM_FEATURE_OMAPCP))
1370 break;
1371 if (arm_feature(env, ARM_FEATURE_V7)
1372 && op1 == 2 && crm == 0 && op2 == 0) {
1373 env->cp15.c0_cssel = val & 0xf;
1374 break;
1375 }
1376 goto bad_reg;
1377 case 1: /* System configuration. */
1378 if (arm_feature(env, ARM_FEATURE_OMAPCP))
1379 op2 = 0;
1380 switch (op2) {
1381 case 0:
1382 if (!arm_feature(env, ARM_FEATURE_XSCALE) || crm == 0)
1383 env->cp15.c1_sys = val;
1384 /* ??? Lots of these bits are not implemented. */
1385 /* This may enable/disable the MMU, so do a TLB flush. */
1386 tlb_flush(env, 1);
1387 break;
1388 case 1: /* Auxiliary control register. */
1389 if (arm_feature(env, ARM_FEATURE_XSCALE)) {
1390 env->cp15.c1_xscaleauxcr = val;
1391 break;
1392 }
1393 /* Not implemented. */
1394 break;
1395 case 2:
1396 if (arm_feature(env, ARM_FEATURE_XSCALE))
1397 goto bad_reg;
1398 if (env->cp15.c1_coproc != val) {
1399 env->cp15.c1_coproc = val;
1400 /* ??? Is this safe when called from within a TB? */
1401 tb_flush(env);
1402 }
1403 break;
1404 default:
1405 goto bad_reg;
1406 }
1407 break;
1408 case 2: /* MMU Page table control / MPU cache control. */
1409 if (arm_feature(env, ARM_FEATURE_MPU)) {
1410 switch (op2) {
1411 case 0:
1412 env->cp15.c2_data = val;
1413 break;
1414 case 1:
1415 env->cp15.c2_insn = val;
1416 break;
1417 default:
1418 goto bad_reg;
1419 }
1420 } else {
1421 switch (op2) {
1422 case 0:
1423 env->cp15.c2_base0 = val;
1424 break;
1425 case 1:
1426 env->cp15.c2_base1 = val;
1427 break;
1428 case 2:
1429 val &= 7;
1430 env->cp15.c2_control = val;
1431 env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val);
1432 env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> val);
1433 break;
1434 default:
1435 goto bad_reg;
1436 }
1437 }
1438 break;
1439 case 3: /* MMU Domain access control / MPU write buffer control. */
1440 env->cp15.c3 = val;
1441 tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */
1442 break;
1443 case 4: /* Reserved. */
1444 goto bad_reg;
1445 case 5: /* MMU Fault status / MPU access permission. */
1446 if (arm_feature(env, ARM_FEATURE_OMAPCP))
1447 op2 = 0;
1448 switch (op2) {
1449 case 0:
1450 if (arm_feature(env, ARM_FEATURE_MPU))
1451 val = extended_mpu_ap_bits(val);
1452 env->cp15.c5_data = val;
1453 break;
1454 case 1:
1455 if (arm_feature(env, ARM_FEATURE_MPU))
1456 val = extended_mpu_ap_bits(val);
1457 env->cp15.c5_insn = val;
1458 break;
1459 case 2:
1460 if (!arm_feature(env, ARM_FEATURE_MPU))
1461 goto bad_reg;
1462 env->cp15.c5_data = val;
1463 break;
1464 case 3:
1465 if (!arm_feature(env, ARM_FEATURE_MPU))
1466 goto bad_reg;
1467 env->cp15.c5_insn = val;
1468 break;
1469 default:
1470 goto bad_reg;
1471 }
1472 break;
1473 case 6: /* MMU Fault address / MPU base/size. */
1474 if (arm_feature(env, ARM_FEATURE_MPU)) {
1475 if (crm >= 8)
1476 goto bad_reg;
1477 env->cp15.c6_region[crm] = val;
1478 } else {
1479 if (arm_feature(env, ARM_FEATURE_OMAPCP))
1480 op2 = 0;
1481 switch (op2) {
1482 case 0:
1483 env->cp15.c6_data = val;
1484 break;
1485 case 1: /* ??? This is WFAR on armv6 */
1486 case 2:
1487 env->cp15.c6_insn = val;
1488 break;
1489 default:
1490 goto bad_reg;
1491 }
1492 }
1493 break;
1494 case 7: /* Cache control. */
1495 env->cp15.c15_i_max = 0x000;
1496 env->cp15.c15_i_min = 0xff0;
1497 if (op1 != 0) {
1498 goto bad_reg;
1499 }
1500 /* No cache, so nothing to do except VA->PA translations. */
1501 if (arm_feature(env, ARM_FEATURE_V6K)) {
1502 switch (crm) {
1503 case 4:
1504 if (arm_feature(env, ARM_FEATURE_V7)) {
1505 env->cp15.c7_par = val & 0xfffff6ff;
1506 } else {
1507 env->cp15.c7_par = val & 0xfffff1ff;
1508 }
1509 break;
1510 case 8: {
1511 uint32_t phys_addr;
1512 target_ulong page_size;
1513 int prot;
1514 int ret, is_user = op2 & 2;
1515 int access_type = op2 & 1;
1516
1517 if (op2 & 4) {
1518 /* Other states are only available with TrustZone */
1519 goto bad_reg;
1520 }
1521 ret = get_phys_addr(env, val, access_type, is_user,
1522 &phys_addr, &prot, &page_size);
1523 if (ret == 0) {
1524 /* We do not set any attribute bits in the PAR */
1525 if (page_size == (1 << 24)
1526 && arm_feature(env, ARM_FEATURE_V7)) {
1527 env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1;
1528 } else {
1529 env->cp15.c7_par = phys_addr & 0xfffff000;
1530 }
1531 } else {
1532 env->cp15.c7_par = ((ret & (10 << 1)) >> 5) |
1533 ((ret & (12 << 1)) >> 6) |
1534 ((ret & 0xf) << 1) | 1;
1535 }
1536 break;
1537 }
1538 }
1539 }
1540 break;
1541 case 8: /* MMU TLB control. */
1542 switch (op2) {
1543 case 0: /* Invalidate all. */
1544 tlb_flush(env, 0);
1545 break;
1546 case 1: /* Invalidate single TLB entry. */
1547 tlb_flush_page(env, val & TARGET_PAGE_MASK);
1548 break;
1549 case 2: /* Invalidate on ASID. */
1550 tlb_flush(env, val == 0);
1551 break;
1552 case 3: /* Invalidate single entry on MVA. */
1553 /* ??? This is like case 1, but ignores ASID. */
1554 tlb_flush(env, 1);
1555 break;
1556 default:
1557 goto bad_reg;
1558 }
1559 break;
1560 case 9:
1561 if (arm_feature(env, ARM_FEATURE_OMAPCP))
1562 break;
1563 if (arm_feature(env, ARM_FEATURE_STRONGARM))
1564 break; /* Ignore ReadBuffer access */
1565 switch (crm) {
1566 case 0: /* Cache lockdown. */
1567 switch (op1) {
1568 case 0: /* L1 cache. */
1569 switch (op2) {
1570 case 0:
1571 env->cp15.c9_data = val;
1572 break;
1573 case 1:
1574 env->cp15.c9_insn = val;
1575 break;
1576 default:
1577 goto bad_reg;
1578 }
1579 break;
1580 case 1: /* L2 cache. */
1581 /* Ignore writes to L2 lockdown/auxiliary registers. */
1582 break;
1583 default:
1584 goto bad_reg;
1585 }
1586 break;
1587 case 1: /* TCM memory region registers. */
1588 /* Not implemented. */
1589 goto bad_reg;
1590 default:
1591 goto bad_reg;
1592 }
1593 break;
1594 case 10: /* MMU TLB lockdown. */
1595 /* ??? TLB lockdown not implemented. */
1596 break;
1597 case 12: /* Reserved. */
1598 goto bad_reg;
1599 case 13: /* Process ID. */
1600 switch (op2) {
1601 case 0:
1602 /* Unlike real hardware the qemu TLB uses virtual addresses,
1603 not modified virtual addresses, so this causes a TLB flush.
1604 */
1605 if (env->cp15.c13_fcse != val)
1606 tlb_flush(env, 1);
1607 env->cp15.c13_fcse = val;
1608 break;
1609 case 1:
1610 /* This changes the ASID, so do a TLB flush. */
1611 if (env->cp15.c13_context != val
1612 && !arm_feature(env, ARM_FEATURE_MPU))
1613 tlb_flush(env, 0);
1614 env->cp15.c13_context = val;
1615 break;
1616 default:
1617 goto bad_reg;
1618 }
1619 break;
1620 case 14: /* Reserved. */
1621 goto bad_reg;
1622 case 15: /* Implementation specific. */
1623 if (arm_feature(env, ARM_FEATURE_XSCALE)) {
1624 if (op2 == 0 && crm == 1) {
1625 if (env->cp15.c15_cpar != (val & 0x3fff)) {
1626 /* Changes cp0 to cp13 behavior, so needs a TB flush. */
1627 tb_flush(env);
1628 env->cp15.c15_cpar = val & 0x3fff;
1629 }
1630 break;
1631 }
1632 goto bad_reg;
1633 }
1634 if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
1635 switch (crm) {
1636 case 0:
1637 break;
1638 case 1: /* Set TI925T configuration. */
1639 env->cp15.c15_ticonfig = val & 0xe7;
1640 env->cp15.c0_cpuid = (val & (1 << 5)) ? /* OS_TYPE bit */
1641 ARM_CPUID_TI915T : ARM_CPUID_TI925T;
1642 break;
1643 case 2: /* Set I_max. */
1644 env->cp15.c15_i_max = val;
1645 break;
1646 case 3: /* Set I_min. */
1647 env->cp15.c15_i_min = val;
1648 break;
1649 case 4: /* Set thread-ID. */
1650 env->cp15.c15_threadid = val & 0xffff;
1651 break;
1652 case 8: /* Wait-for-interrupt (deprecated). */
1653 cpu_interrupt(env, CPU_INTERRUPT_HALT);
1654 break;
1655 default:
1656 goto bad_reg;
1657 }
1658 }
1659 break;
1660 }
1661 return;
1662 bad_reg:
1663 /* ??? For debugging only. Should raise illegal instruction exception. */
1664 cpu_abort(env, "Unimplemented cp15 register write (c%d, c%d, {%d, %d})\n",
1665 (insn >> 16) & 0xf, crm, op1, op2);
1666 }
1667
1668 uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn)
1669 {
1670 int op1;
1671 int op2;
1672 int crm;
1673
1674 op1 = (insn >> 21) & 7;
1675 op2 = (insn >> 5) & 7;
1676 crm = insn & 0xf;
1677 switch ((insn >> 16) & 0xf) {
1678 case 0: /* ID codes. */
1679 switch (op1) {
1680 case 0:
1681 switch (crm) {
1682 case 0:
1683 switch (op2) {
1684 case 0: /* Device ID. */
1685 return env->cp15.c0_cpuid;
1686 case 1: /* Cache Type. */
1687 return env->cp15.c0_cachetype;
1688 case 2: /* TCM status. */
1689 return 0;
1690 case 3: /* TLB type register. */
1691 return 0; /* No lockable TLB entries. */
1692 case 5: /* MPIDR */
1693 /* The MPIDR was standardised in v7; prior to
1694 * this it was implemented only in the 11MPCore.
1695 * For all other pre-v7 cores it does not exist.
1696 */
1697 if (arm_feature(env, ARM_FEATURE_V7) ||
1698 ARM_CPUID(env) == ARM_CPUID_ARM11MPCORE) {
1699 int mpidr = env->cpu_index;
1700 /* We don't support setting cluster ID ([8..11])
1701 * so these bits always RAZ.
1702 */
1703 if (arm_feature(env, ARM_FEATURE_V7MP)) {
1704 mpidr |= (1 << 31);
1705 /* Cores which are uniprocessor (non-coherent)
1706 * but still implement the MP extensions set
1707 * bit 30. (For instance, A9UP.) However we do
1708 * not currently model any of those cores.
1709 */
1710 }
1711 return mpidr;
1712 }
1713 /* otherwise fall through to the unimplemented-reg case */
1714 default:
1715 goto bad_reg;
1716 }
1717 case 1:
1718 if (!arm_feature(env, ARM_FEATURE_V6))
1719 goto bad_reg;
1720 return env->cp15.c0_c1[op2];
1721 case 2:
1722 if (!arm_feature(env, ARM_FEATURE_V6))
1723 goto bad_reg;
1724 return env->cp15.c0_c2[op2];
1725 case 3: case 4: case 5: case 6: case 7:
1726 return 0;
1727 default:
1728 goto bad_reg;
1729 }
1730 case 1:
1731 /* These registers aren't documented on arm11 cores. However
1732 Linux looks at them anyway. */
1733 if (!arm_feature(env, ARM_FEATURE_V6))
1734 goto bad_reg;
1735 if (crm != 0)
1736 goto bad_reg;
1737 if (!arm_feature(env, ARM_FEATURE_V7))
1738 return 0;
1739
1740 switch (op2) {
1741 case 0:
1742 return env->cp15.c0_ccsid[env->cp15.c0_cssel];
1743 case 1:
1744 return env->cp15.c0_clid;
1745 case 7:
1746 return 0;
1747 }
1748 goto bad_reg;
1749 case 2:
1750 if (op2 != 0 || crm != 0)
1751 goto bad_reg;
1752 return env->cp15.c0_cssel;
1753 default:
1754 goto bad_reg;
1755 }
1756 case 1: /* System configuration. */
1757 if (arm_feature(env, ARM_FEATURE_OMAPCP))
1758 op2 = 0;
1759 switch (op2) {
1760 case 0: /* Control register. */
1761 return env->cp15.c1_sys;
1762 case 1: /* Auxiliary control register. */
1763 if (arm_feature(env, ARM_FEATURE_XSCALE))
1764 return env->cp15.c1_xscaleauxcr;
1765 if (!arm_feature(env, ARM_FEATURE_AUXCR))
1766 goto bad_reg;
1767 switch (ARM_CPUID(env)) {
1768 case ARM_CPUID_ARM1026:
1769 return 1;
1770 case ARM_CPUID_ARM1136:
1771 case ARM_CPUID_ARM1136_R2:
1772 return 7;
1773 case ARM_CPUID_ARM11MPCORE:
1774 return 1;
1775 case ARM_CPUID_CORTEXA8:
1776 return 2;
1777 case ARM_CPUID_CORTEXA9:
1778 return 0;
1779 default:
1780 goto bad_reg;
1781 }
1782 case 2: /* Coprocessor access register. */
1783 if (arm_feature(env, ARM_FEATURE_XSCALE))
1784 goto bad_reg;
1785 return env->cp15.c1_coproc;
1786 default:
1787 goto bad_reg;
1788 }
1789 case 2: /* MMU Page table control / MPU cache control. */
1790 if (arm_feature(env, ARM_FEATURE_MPU)) {
1791 switch (op2) {
1792 case 0:
1793 return env->cp15.c2_data;
1794 break;
1795 case 1:
1796 return env->cp15.c2_insn;
1797 break;
1798 default:
1799 goto bad_reg;
1800 }
1801 } else {
1802 switch (op2) {
1803 case 0:
1804 return env->cp15.c2_base0;
1805 case 1:
1806 return env->cp15.c2_base1;
1807 case 2:
1808 return env->cp15.c2_control;
1809 default:
1810 goto bad_reg;
1811 }
1812 }
1813 case 3: /* MMU Domain access control / MPU write buffer control. */
1814 return env->cp15.c3;
1815 case 4: /* Reserved. */
1816 goto bad_reg;
1817 case 5: /* MMU Fault status / MPU access permission. */
1818 if (arm_feature(env, ARM_FEATURE_OMAPCP))
1819 op2 = 0;
1820 switch (op2) {
1821 case 0:
1822 if (arm_feature(env, ARM_FEATURE_MPU))
1823 return simple_mpu_ap_bits(env->cp15.c5_data);
1824 return env->cp15.c5_data;
1825 case 1:
1826 if (arm_feature(env, ARM_FEATURE_MPU))
1827 return simple_mpu_ap_bits(env->cp15.c5_data);
1828 return env->cp15.c5_insn;
1829 case 2:
1830 if (!arm_feature(env, ARM_FEATURE_MPU))
1831 goto bad_reg;
1832 return env->cp15.c5_data;
1833 case 3:
1834 if (!arm_feature(env, ARM_FEATURE_MPU))
1835 goto bad_reg;
1836 return env->cp15.c5_insn;
1837 default:
1838 goto bad_reg;
1839 }
1840 case 6: /* MMU Fault address. */
1841 if (arm_feature(env, ARM_FEATURE_MPU)) {
1842 if (crm >= 8)
1843 goto bad_reg;
1844 return env->cp15.c6_region[crm];
1845 } else {
1846 if (arm_feature(env, ARM_FEATURE_OMAPCP))
1847 op2 = 0;
1848 switch (op2) {
1849 case 0:
1850 return env->cp15.c6_data;
1851 case 1:
1852 if (arm_feature(env, ARM_FEATURE_V6)) {
1853 /* Watchpoint Fault Adrress. */
1854 return 0; /* Not implemented. */
1855 } else {
1856 /* Instruction Fault Adrress. */
1857 /* Arm9 doesn't have an IFAR, but implementing it anyway
1858 shouldn't do any harm. */
1859 return env->cp15.c6_insn;
1860 }
1861 case 2:
1862 if (arm_feature(env, ARM_FEATURE_V6)) {
1863 /* Instruction Fault Adrress. */
1864 return env->cp15.c6_insn;
1865 } else {
1866 goto bad_reg;
1867 }
1868 default:
1869 goto bad_reg;
1870 }
1871 }
1872 case 7: /* Cache control. */
1873 if (crm == 4 && op1 == 0 && op2 == 0) {
1874 return env->cp15.c7_par;
1875 }
1876 /* FIXME: Should only clear Z flag if destination is r15. */
1877 env->ZF = 0;
1878 return 0;
1879 case 8: /* MMU TLB control. */
1880 goto bad_reg;
1881 case 9: /* Cache lockdown. */
1882 switch (op1) {
1883 case 0: /* L1 cache. */
1884 if (arm_feature(env, ARM_FEATURE_OMAPCP))
1885 return 0;
1886 switch (op2) {
1887 case 0:
1888 return env->cp15.c9_data;
1889 case 1:
1890 return env->cp15.c9_insn;
1891 default:
1892 goto bad_reg;
1893 }
1894 case 1: /* L2 cache */
1895 if (crm != 0)
1896 goto bad_reg;
1897 /* L2 Lockdown and Auxiliary control. */
1898 return 0;
1899 default:
1900 goto bad_reg;
1901 }
1902 case 10: /* MMU TLB lockdown. */
1903 /* ??? TLB lockdown not implemented. */
1904 return 0;
1905 case 11: /* TCM DMA control. */
1906 case 12: /* Reserved. */
1907 goto bad_reg;
1908 case 13: /* Process ID. */
1909 switch (op2) {
1910 case 0:
1911 return env->cp15.c13_fcse;
1912 case 1:
1913 return env->cp15.c13_context;
1914 default:
1915 goto bad_reg;
1916 }
1917 case 14: /* Reserved. */
1918 goto bad_reg;
1919 case 15: /* Implementation specific. */
1920 if (arm_feature(env, ARM_FEATURE_XSCALE)) {
1921 if (op2 == 0 && crm == 1)
1922 return env->cp15.c15_cpar;
1923
1924 goto bad_reg;
1925 }
1926 if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
1927 switch (crm) {
1928 case 0:
1929 return 0;
1930 case 1: /* Read TI925T configuration. */
1931 return env->cp15.c15_ticonfig;
1932 case 2: /* Read I_max. */
1933 return env->cp15.c15_i_max;
1934 case 3: /* Read I_min. */
1935 return env->cp15.c15_i_min;
1936 case 4: /* Read thread-ID. */
1937 return env->cp15.c15_threadid;
1938 case 8: /* TI925T_status */
1939 return 0;
1940 }
1941 /* TODO: Peripheral port remap register:
1942 * On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt
1943 * controller base address at $rn & ~0xfff and map size of
1944 * 0x200 << ($rn & 0xfff), when MMU is off. */
1945 goto bad_reg;
1946 }
1947 return 0;
1948 }
1949 bad_reg:
1950 /* ??? For debugging only. Should raise illegal instruction exception. */
1951 cpu_abort(env, "Unimplemented cp15 register read (c%d, c%d, {%d, %d})\n",
1952 (insn >> 16) & 0xf, crm, op1, op2);
1953 return 0;
1954 }
1955
1956 void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
1957 {
1958 if ((env->uncached_cpsr & CPSR_M) == mode) {
1959 env->regs[13] = val;
1960 } else {
1961 env->banked_r13[bank_number(mode)] = val;
1962 }
1963 }
1964
1965 uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode)
1966 {
1967 if ((env->uncached_cpsr & CPSR_M) == mode) {
1968 return env->regs[13];
1969 } else {
1970 return env->banked_r13[bank_number(mode)];
1971 }
1972 }
1973
1974 uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg)
1975 {
1976 switch (reg) {
1977 case 0: /* APSR */
1978 return xpsr_read(env) & 0xf8000000;
1979 case 1: /* IAPSR */
1980 return xpsr_read(env) & 0xf80001ff;
1981 case 2: /* EAPSR */
1982 return xpsr_read(env) & 0xff00fc00;
1983 case 3: /* xPSR */
1984 return xpsr_read(env) & 0xff00fdff;
1985 case 5: /* IPSR */
1986 return xpsr_read(env) & 0x000001ff;
1987 case 6: /* EPSR */
1988 return xpsr_read(env) & 0x0700fc00;
1989 case 7: /* IEPSR */
1990 return xpsr_read(env) & 0x0700edff;
1991 case 8: /* MSP */
1992 return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13];
1993 case 9: /* PSP */
1994 return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp;
1995 case 16: /* PRIMASK */
1996 return (env->uncached_cpsr & CPSR_I) != 0;
1997 case 17: /* FAULTMASK */
1998 return (env->uncached_cpsr & CPSR_F) != 0;
1999 case 18: /* BASEPRI */
2000 case 19: /* BASEPRI_MAX */
2001 return env->v7m.basepri;
2002 case 20: /* CONTROL */
2003 return env->v7m.control;
2004 default:
2005 /* ??? For debugging only. */
2006 cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
2007 return 0;
2008 }
2009 }
2010
2011 void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
2012 {
2013 switch (reg) {
2014 case 0: /* APSR */
2015 xpsr_write(env, val, 0xf8000000);
2016 break;
2017 case 1: /* IAPSR */
2018 xpsr_write(env, val, 0xf8000000);
2019 break;
2020 case 2: /* EAPSR */
2021 xpsr_write(env, val, 0xfe00fc00);
2022 break;
2023 case 3: /* xPSR */
2024 xpsr_write(env, val, 0xfe00fc00);
2025 break;
2026 case 5: /* IPSR */
2027 /* IPSR bits are readonly. */
2028 break;
2029 case 6: /* EPSR */
2030 xpsr_write(env, val, 0x0600fc00);
2031 break;
2032 case 7: /* IEPSR */
2033 xpsr_write(env, val, 0x0600fc00);
2034 break;
2035 case 8: /* MSP */
2036 if (env->v7m.current_sp)
2037 env->v7m.other_sp = val;
2038 else
2039 env->regs[13] = val;
2040 break;
2041 case 9: /* PSP */
2042 if (env->v7m.current_sp)
2043 env->regs[13] = val;
2044 else
2045 env->v7m.other_sp = val;
2046 break;
2047 case 16: /* PRIMASK */
2048 if (val & 1)
2049 env->uncached_cpsr |= CPSR_I;
2050 else
2051 env->uncached_cpsr &= ~CPSR_I;
2052 break;
2053 case 17: /* FAULTMASK */
2054 if (val & 1)
2055 env->uncached_cpsr |= CPSR_F;
2056 else
2057 env->uncached_cpsr &= ~CPSR_F;
2058 break;
2059 case 18: /* BASEPRI */
2060 env->v7m.basepri = val & 0xff;
2061 break;
2062 case 19: /* BASEPRI_MAX */
2063 val &= 0xff;
2064 if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0))
2065 env->v7m.basepri = val;
2066 break;
2067 case 20: /* CONTROL */
2068 env->v7m.control = val & 3;
2069 switch_v7m_sp(env, (val & 2) != 0);
2070 break;
2071 default:
2072 /* ??? For debugging only. */
2073 cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
2074 return;
2075 }
2076 }
2077
2078 void cpu_arm_set_cp_io(CPUARMState *env, int cpnum,
2079 ARMReadCPFunc *cp_read, ARMWriteCPFunc *cp_write,
2080 void *opaque)
2081 {
2082 if (cpnum < 0 || cpnum > 14) {
2083 cpu_abort(env, "Bad coprocessor number: %i\n", cpnum);
2084 return;
2085 }
2086
2087 env->cp[cpnum].cp_read = cp_read;
2088 env->cp[cpnum].cp_write = cp_write;
2089 env->cp[cpnum].opaque = opaque;
2090 }
2091
2092 #endif
2093
2094 /* Note that signed overflow is undefined in C. The following routines are
2095 careful to use unsigned types where modulo arithmetic is required.
2096 Failure to do so _will_ break on newer gcc. */
2097
2098 /* Signed saturating arithmetic. */
2099
2100 /* Perform 16-bit signed saturating addition. */
2101 static inline uint16_t add16_sat(uint16_t a, uint16_t b)
2102 {
2103 uint16_t res;
2104
2105 res = a + b;
2106 if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) {
2107 if (a & 0x8000)
2108 res = 0x8000;
2109 else
2110 res = 0x7fff;
2111 }
2112 return res;
2113 }
2114
2115 /* Perform 8-bit signed saturating addition. */
2116 static inline uint8_t add8_sat(uint8_t a, uint8_t b)
2117 {
2118 uint8_t res;
2119
2120 res = a + b;
2121 if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) {
2122 if (a & 0x80)
2123 res = 0x80;
2124 else
2125 res = 0x7f;
2126 }
2127 return res;
2128 }
2129
2130 /* Perform 16-bit signed saturating subtraction. */
2131 static inline uint16_t sub16_sat(uint16_t a, uint16_t b)
2132 {
2133 uint16_t res;
2134
2135 res = a - b;
2136 if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) {
2137 if (a & 0x8000)
2138 res = 0x8000;
2139 else
2140 res = 0x7fff;
2141 }
2142 return res;
2143 }
2144
2145 /* Perform 8-bit signed saturating subtraction. */
2146 static inline uint8_t sub8_sat(uint8_t a, uint8_t b)
2147 {
2148 uint8_t res;
2149
2150 res = a - b;
2151 if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) {
2152 if (a & 0x80)
2153 res = 0x80;
2154 else
2155 res = 0x7f;
2156 }
2157 return res;
2158 }
2159
2160 #define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
2161 #define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
2162 #define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8);
2163 #define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8);
2164 #define PFX q
2165
2166 #include "op_addsub.h"
2167
2168 /* Unsigned saturating arithmetic. */
2169 static inline uint16_t add16_usat(uint16_t a, uint16_t b)
2170 {
2171 uint16_t res;
2172 res = a + b;
2173 if (res < a)
2174 res = 0xffff;
2175 return res;
2176 }
2177
2178 static inline uint16_t sub16_usat(uint16_t a, uint16_t b)
2179 {
2180 if (a > b)
2181 return a - b;
2182 else
2183 return 0;
2184 }
2185
2186 static inline uint8_t add8_usat(uint8_t a, uint8_t b)
2187 {
2188 uint8_t res;
2189 res = a + b;
2190 if (res < a)
2191 res = 0xff;
2192 return res;
2193 }
2194
2195 static inline uint8_t sub8_usat(uint8_t a, uint8_t b)
2196 {
2197 if (a > b)
2198 return a - b;
2199 else
2200 return 0;
2201 }
2202
2203 #define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
2204 #define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
2205 #define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8);
2206 #define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8);
2207 #define PFX uq
2208
2209 #include "op_addsub.h"
2210
2211 /* Signed modulo arithmetic. */
2212 #define SARITH16(a, b, n, op) do { \
2213 int32_t sum; \
2214 sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
2215 RESULT(sum, n, 16); \
2216 if (sum >= 0) \
2217 ge |= 3 << (n * 2); \
2218 } while(0)
2219
2220 #define SARITH8(a, b, n, op) do { \
2221 int32_t sum; \
2222 sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
2223 RESULT(sum, n, 8); \
2224 if (sum >= 0) \
2225 ge |= 1 << n; \
2226 } while(0)
2227
2228
2229 #define ADD16(a, b, n) SARITH16(a, b, n, +)
2230 #define SUB16(a, b, n) SARITH16(a, b, n, -)
2231 #define ADD8(a, b, n) SARITH8(a, b, n, +)
2232 #define SUB8(a, b, n) SARITH8(a, b, n, -)
2233 #define PFX s
2234 #define ARITH_GE
2235
2236 #include "op_addsub.h"
2237
2238 /* Unsigned modulo arithmetic. */
2239 #define ADD16(a, b, n) do { \
2240 uint32_t sum; \
2241 sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
2242 RESULT(sum, n, 16); \
2243 if ((sum >> 16) == 1) \
2244 ge |= 3 << (n * 2); \
2245 } while(0)
2246
2247 #define ADD8(a, b, n) do { \
2248 uint32_t sum; \
2249 sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
2250 RESULT(sum, n, 8); \
2251 if ((sum >> 8) == 1) \
2252 ge |= 1 << n; \
2253 } while(0)
2254
2255 #define SUB16(a, b, n) do { \
2256 uint32_t sum; \
2257 sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
2258 RESULT(sum, n, 16); \
2259 if ((sum >> 16) == 0) \
2260 ge |= 3 << (n * 2); \
2261 } while(0)
2262
2263 #define SUB8(a, b, n) do { \
2264 uint32_t sum; \
2265 sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
2266 RESULT(sum, n, 8); \
2267 if ((sum >> 8) == 0) \
2268 ge |= 1 << n; \
2269 } while(0)
2270
2271 #define PFX u
2272 #define ARITH_GE
2273
2274 #include "op_addsub.h"
2275
2276 /* Halved signed arithmetic. */
2277 #define ADD16(a, b, n) \
2278 RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
2279 #define SUB16(a, b, n) \
2280 RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
2281 #define ADD8(a, b, n) \
2282 RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
2283 #define SUB8(a, b, n) \
2284 RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
2285 #define PFX sh
2286
2287 #include "op_addsub.h"
2288
2289 /* Halved unsigned arithmetic. */
2290 #define ADD16(a, b, n) \
2291 RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
2292 #define SUB16(a, b, n) \
2293 RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
2294 #define ADD8(a, b, n) \
2295 RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
2296 #define SUB8(a, b, n) \
2297 RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
2298 #define PFX uh
2299
2300 #include "op_addsub.h"
2301
2302 static inline uint8_t do_usad(uint8_t a, uint8_t b)
2303 {
2304 if (a > b)
2305 return a - b;
2306 else
2307 return b - a;
2308 }
2309
2310 /* Unsigned sum of absolute byte differences. */
2311 uint32_t HELPER(usad8)(uint32_t a, uint32_t b)
2312 {
2313 uint32_t sum;
2314 sum = do_usad(a, b);
2315 sum += do_usad(a >> 8, b >> 8);
2316 sum += do_usad(a >> 16, b >>16);
2317 sum += do_usad(a >> 24, b >> 24);
2318 return sum;
2319 }
2320
2321 /* For ARMv6 SEL instruction. */
2322 uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b)
2323 {
2324 uint32_t mask;
2325
2326 mask = 0;
2327 if (flags & 1)
2328 mask |= 0xff;
2329 if (flags & 2)
2330 mask |= 0xff00;
2331 if (flags & 4)
2332 mask |= 0xff0000;
2333 if (flags & 8)
2334 mask |= 0xff000000;
2335 return (a & mask) | (b & ~mask);
2336 }
2337
2338 uint32_t HELPER(logicq_cc)(uint64_t val)
2339 {
2340 return (val >> 32) | (val != 0);
2341 }
2342
2343 /* VFP support. We follow the convention used for VFP instrunctions:
2344 Single precition routines have a "s" suffix, double precision a
2345 "d" suffix. */
2346
2347 /* Convert host exception flags to vfp form. */
2348 static inline int vfp_exceptbits_from_host(int host_bits)
2349 {
2350 int target_bits = 0;
2351
2352 if (host_bits & float_flag_invalid)
2353 target_bits |= 1;
2354 if (host_bits & float_flag_divbyzero)
2355 target_bits |= 2;
2356 if (host_bits & float_flag_overflow)
2357 target_bits |= 4;
2358 if (host_bits & (float_flag_underflow | float_flag_output_denormal))
2359 target_bits |= 8;
2360 if (host_bits & float_flag_inexact)
2361 target_bits |= 0x10;
2362 if (host_bits & float_flag_input_denormal)
2363 target_bits |= 0x80;
2364 return target_bits;
2365 }
2366
2367 uint32_t HELPER(vfp_get_fpscr)(CPUState *env)
2368 {
2369 int i;
2370 uint32_t fpscr;
2371
2372 fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
2373 | (env->vfp.vec_len << 16)
2374 | (env->vfp.vec_stride << 20);
2375 i = get_float_exception_flags(&env->vfp.fp_status);
2376 i |= get_float_exception_flags(&env->vfp.standard_fp_status);
2377 fpscr |= vfp_exceptbits_from_host(i);
2378 return fpscr;
2379 }
2380
2381 uint32_t vfp_get_fpscr(CPUState *env)
2382 {
2383 return HELPER(vfp_get_fpscr)(env);
2384 }
2385
2386 /* Convert vfp exception flags to target form. */
2387 static inline int vfp_exceptbits_to_host(int target_bits)
2388 {
2389 int host_bits = 0;
2390
2391 if (target_bits & 1)
2392 host_bits |= float_flag_invalid;
2393 if (target_bits & 2)
2394 host_bits |= float_flag_divbyzero;
2395 if (target_bits & 4)
2396 host_bits |= float_flag_overflow;
2397 if (target_bits & 8)
2398 host_bits |= float_flag_underflow;
2399 if (target_bits & 0x10)
2400 host_bits |= float_flag_inexact;
2401 if (target_bits & 0x80)
2402 host_bits |= float_flag_input_denormal;
2403 return host_bits;
2404 }
2405
2406 void HELPER(vfp_set_fpscr)(CPUState *env, uint32_t val)
2407 {
2408 int i;
2409 uint32_t changed;
2410
2411 changed = env->vfp.xregs[ARM_VFP_FPSCR];
2412 env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
2413 env->vfp.vec_len = (val >> 16) & 7;
2414 env->vfp.vec_stride = (val >> 20) & 3;
2415
2416 changed ^= val;
2417 if (changed & (3 << 22)) {
2418 i = (val >> 22) & 3;
2419 switch (i) {
2420 case 0:
2421 i = float_round_nearest_even;
2422 break;
2423 case 1:
2424 i = float_round_up;
2425 break;
2426 case 2:
2427 i = float_round_down;
2428 break;
2429 case 3:
2430 i = float_round_to_zero;
2431 break;
2432 }
2433 set_float_rounding_mode(i, &env->vfp.fp_status);
2434 }
2435 if (changed & (1 << 24)) {
2436 set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
2437 set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
2438 }
2439 if (changed & (1 << 25))
2440 set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status);
2441
2442 i = vfp_exceptbits_to_host(val);
2443 set_float_exception_flags(i, &env->vfp.fp_status);
2444 set_float_exception_flags(0, &env->vfp.standard_fp_status);
2445 }
2446
2447 void vfp_set_fpscr(CPUState *env, uint32_t val)
2448 {
2449 HELPER(vfp_set_fpscr)(env, val);
2450 }
2451
2452 #define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
2453
2454 #define VFP_BINOP(name) \
2455 float32 VFP_HELPER(name, s)(float32 a, float32 b, CPUState *env) \
2456 { \
2457 return float32_ ## name (a, b, &env->vfp.fp_status); \
2458 } \
2459 float64 VFP_HELPER(name, d)(float64 a, float64 b, CPUState *env) \
2460 { \
2461 return float64_ ## name (a, b, &env->vfp.fp_status); \
2462 }
2463 VFP_BINOP(add)
2464 VFP_BINOP(sub)
2465 VFP_BINOP(mul)
2466 VFP_BINOP(div)
2467 #undef VFP_BINOP
2468
2469 float32 VFP_HELPER(neg, s)(float32 a)
2470 {
2471 return float32_chs(a);
2472 }
2473
2474 float64 VFP_HELPER(neg, d)(float64 a)
2475 {
2476 return float64_chs(a);
2477 }
2478
2479 float32 VFP_HELPER(abs, s)(float32 a)
2480 {
2481 return float32_abs(a);
2482 }
2483
2484 float64 VFP_HELPER(abs, d)(float64 a)
2485 {
2486 return float64_abs(a);
2487 }
2488
2489 float32 VFP_HELPER(sqrt, s)(float32 a, CPUState *env)
2490 {
2491 return float32_sqrt(a, &env->vfp.fp_status);
2492 }
2493
2494 float64 VFP_HELPER(sqrt, d)(float64 a, CPUState *env)
2495 {
2496 return float64_sqrt(a, &env->vfp.fp_status);
2497 }
2498
2499 /* XXX: check quiet/signaling case */
2500 #define DO_VFP_cmp(p, type) \
2501 void VFP_HELPER(cmp, p)(type a, type b, CPUState *env) \
2502 { \
2503 uint32_t flags; \
2504 switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \
2505 case 0: flags = 0x6; break; \
2506 case -1: flags = 0x8; break; \
2507 case 1: flags = 0x2; break; \
2508 default: case 2: flags = 0x3; break; \
2509 } \
2510 env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
2511 | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
2512 } \
2513 void VFP_HELPER(cmpe, p)(type a, type b, CPUState *env) \
2514 { \
2515 uint32_t flags; \
2516 switch(type ## _compare(a, b, &env->vfp.fp_status)) { \
2517 case 0: flags = 0x6; break; \
2518 case -1: flags = 0x8; break; \
2519 case 1: flags = 0x2; break; \
2520 default: case 2: flags = 0x3; break; \
2521 } \
2522 env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
2523 | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
2524 }
2525 DO_VFP_cmp(s, float32)
2526 DO_VFP_cmp(d, float64)
2527 #undef DO_VFP_cmp
2528
2529 /* Integer to float and float to integer conversions */
2530
2531 #define CONV_ITOF(name, fsz, sign) \
2532 float##fsz HELPER(name)(uint32_t x, void *fpstp) \
2533 { \
2534 float_status *fpst = fpstp; \
2535 return sign##int32_to_##float##fsz(x, fpst); \
2536 }
2537
2538 #define CONV_FTOI(name, fsz, sign, round) \
2539 uint32_t HELPER(name)(float##fsz x, void *fpstp) \
2540 { \
2541 float_status *fpst = fpstp; \
2542 if (float##fsz##_is_any_nan(x)) { \
2543 float_raise(float_flag_invalid, fpst); \
2544 return 0; \
2545 } \
2546 return float##fsz##_to_##sign##int32##round(x, fpst); \
2547 }
2548
2549 #define FLOAT_CONVS(name, p, fsz, sign) \
2550 CONV_ITOF(vfp_##name##to##p, fsz, sign) \
2551 CONV_FTOI(vfp_to##name##p, fsz, sign, ) \
2552 CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero)
2553
2554 FLOAT_CONVS(si, s, 32, )
2555 FLOAT_CONVS(si, d, 64, )
2556 FLOAT_CONVS(ui, s, 32, u)
2557 FLOAT_CONVS(ui, d, 64, u)
2558
2559 #undef CONV_ITOF
2560 #undef CONV_FTOI
2561 #undef FLOAT_CONVS
2562
2563 /* floating point conversion */
2564 float64 VFP_HELPER(fcvtd, s)(float32 x, CPUState *env)
2565 {
2566 float64 r = float32_to_float64(x, &env->vfp.fp_status);
2567 /* ARM requires that S<->D conversion of any kind of NaN generates
2568 * a quiet NaN by forcing the most significant frac bit to 1.
2569 */
2570 return float64_maybe_silence_nan(r);
2571 }
2572
2573 float32 VFP_HELPER(fcvts, d)(float64 x, CPUState *env)
2574 {
2575 float32 r = float64_to_float32(x, &env->vfp.fp_status);
2576 /* ARM requires that S<->D conversion of any kind of NaN generates
2577 * a quiet NaN by forcing the most significant frac bit to 1.
2578 */
2579 return float32_maybe_silence_nan(r);
2580 }
2581
2582 /* VFP3 fixed point conversion. */
2583 #define VFP_CONV_FIX(name, p, fsz, itype, sign) \
2584 float##fsz HELPER(vfp_##name##to##p)(uint##fsz##_t x, uint32_t shift, \
2585 void *fpstp) \
2586 { \
2587 float_status *fpst = fpstp; \
2588 float##fsz tmp; \
2589 tmp = sign##int32_to_##float##fsz((itype##_t)x, fpst); \
2590 return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
2591 } \
2592 uint##fsz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \
2593 void *fpstp) \
2594 { \
2595 float_status *fpst = fpstp; \
2596 float##fsz tmp; \
2597 if (float##fsz##_is_any_nan(x)) { \
2598 float_raise(float_flag_invalid, fpst); \
2599 return 0; \
2600 } \
2601 tmp = float##fsz##_scalbn(x, shift, fpst); \
2602 return float##fsz##_to_##itype##_round_to_zero(tmp, fpst); \
2603 }
2604
2605 VFP_CONV_FIX(sh, d, 64, int16, )
2606 VFP_CONV_FIX(sl, d, 64, int32, )
2607 VFP_CONV_FIX(uh, d, 64, uint16, u)
2608 VFP_CONV_FIX(ul, d, 64, uint32, u)
2609 VFP_CONV_FIX(sh, s, 32, int16, )
2610 VFP_CONV_FIX(sl, s, 32, int32, )
2611 VFP_CONV_FIX(uh, s, 32, uint16, u)
2612 VFP_CONV_FIX(ul, s, 32, uint32, u)
2613 #undef VFP_CONV_FIX
2614
2615 /* Half precision conversions. */
2616 static float32 do_fcvt_f16_to_f32(uint32_t a, CPUState *env, float_status *s)
2617 {
2618 int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
2619 float32 r = float16_to_float32(make_float16(a), ieee, s);
2620 if (ieee) {
2621 return float32_maybe_silence_nan(r);
2622 }
2623 return r;
2624 }
2625
2626 static uint32_t do_fcvt_f32_to_f16(float32 a, CPUState *env, float_status *s)
2627 {
2628 int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
2629 float16 r = float32_to_float16(a, ieee, s);
2630 if (ieee) {
2631 r = float16_maybe_silence_nan(r);
2632 }
2633 return float16_val(r);
2634 }
2635
2636 float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUState *env)
2637 {
2638 return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status);
2639 }
2640
2641 uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUState *env)
2642 {
2643 return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status);
2644 }
2645
2646 float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUState *env)
2647 {
2648 return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status);
2649 }
2650
2651 uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUState *env)
2652 {
2653 return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status);
2654 }
2655
2656 #define float32_two make_float32(0x40000000)
2657 #define float32_three make_float32(0x40400000)
2658 #define float32_one_point_five make_float32(0x3fc00000)
2659
2660 float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env)
2661 {
2662 float_status *s = &env->vfp.standard_fp_status;
2663 if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
2664 (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
2665 if (!(float32_is_zero(a) || float32_is_zero(b))) {
2666 float_raise(float_flag_input_denormal, s);
2667 }
2668 return float32_two;
2669 }
2670 return float32_sub(float32_two, float32_mul(a, b, s), s);
2671 }
2672
2673 float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUState *env)
2674 {
2675 float_status *s = &env->vfp.standard_fp_status;
2676 float32 product;
2677 if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
2678 (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
2679 if (!(float32_is_zero(a) || float32_is_zero(b))) {
2680 float_raise(float_flag_input_denormal, s);
2681 }
2682 return float32_one_point_five;
2683 }
2684 product = float32_mul(a, b, s);
2685 return float32_div(float32_sub(float32_three, product, s), float32_two, s);
2686 }
2687
2688 /* NEON helpers. */
2689
2690 /* Constants 256 and 512 are used in some helpers; we avoid relying on
2691 * int->float conversions at run-time. */
2692 #define float64_256 make_float64(0x4070000000000000LL)
2693 #define float64_512 make_float64(0x4080000000000000LL)
2694
2695 /* The algorithm that must be used to calculate the estimate
2696 * is specified by the ARM ARM.
2697 */
2698 static float64 recip_estimate(float64 a, CPUState *env)
2699 {
2700 /* These calculations mustn't set any fp exception flags,
2701 * so we use a local copy of the fp_status.
2702 */
2703 float_status dummy_status = env->vfp.standard_fp_status;
2704 float_status *s = &dummy_status;
2705 /* q = (int)(a * 512.0) */
2706 float64 q = float64_mul(float64_512, a, s);
2707 int64_t q_int = float64_to_int64_round_to_zero(q, s);
2708
2709 /* r = 1.0 / (((double)q + 0.5) / 512.0) */
2710 q = int64_to_float64(q_int, s);
2711 q = float64_add(q, float64_half, s);
2712 q = float64_div(q, float64_512, s);
2713 q = float64_div(float64_one, q, s);
2714
2715 /* s = (int)(256.0 * r + 0.5) */
2716 q = float64_mul(q, float64_256, s);
2717 q = float64_add(q, float64_half, s);
2718 q_int = float64_to_int64_round_to_zero(q, s);
2719
2720 /* return (double)s / 256.0 */
2721 return float64_div(int64_to_float64(q_int, s), float64_256, s);
2722 }
2723
2724 float32 HELPER(recpe_f32)(float32 a, CPUState *env)
2725 {
2726 float_status *s = &env->vfp.standard_fp_status;
2727 float64 f64;
2728 uint32_t val32 = float32_val(a);
2729
2730 int result_exp;
2731 int a_exp = (val32 & 0x7f800000) >> 23;
2732 int sign = val32 & 0x80000000;
2733
2734 if (float32_is_any_nan(a)) {
2735 if (float32_is_signaling_nan(a)) {
2736 float_raise(float_flag_invalid, s);
2737 }
2738 return float32_default_nan;
2739 } else if (float32_is_infinity(a)) {
2740 return float32_set_sign(float32_zero, float32_is_neg(a));
2741 } else if (float32_is_zero_or_denormal(a)) {
2742 if (!float32_is_zero(a)) {
2743 float_raise(float_flag_input_denormal, s);
2744 }
2745 float_raise(float_flag_divbyzero, s);
2746 return float32_set_sign(float32_infinity, float32_is_neg(a));
2747 } else if (a_exp >= 253) {
2748 float_raise(float_flag_underflow, s);
2749 return float32_set_sign(float32_zero, float32_is_neg(a));
2750 }
2751
2752 f64 = make_float64((0x3feULL << 52)
2753 | ((int64_t)(val32 & 0x7fffff) << 29));
2754
2755 result_exp = 253 - a_exp;
2756
2757 f64 = recip_estimate(f64, env);
2758
2759 val32 = sign
2760 | ((result_exp & 0xff) << 23)
2761 | ((float64_val(f64) >> 29) & 0x7fffff);
2762 return make_float32(val32);
2763 }
2764
2765 /* The algorithm that must be used to calculate the estimate
2766 * is specified by the ARM ARM.
2767 */
2768 static float64 recip_sqrt_estimate(float64 a, CPUState *env)
2769 {
2770 /* These calculations mustn't set any fp exception flags,
2771 * so we use a local copy of the fp_status.
2772 */
2773 float_status dummy_status = env->vfp.standard_fp_status;
2774 float_status *s = &dummy_status;
2775 float64 q;
2776 int64_t q_int;
2777
2778 if (float64_lt(a, float64_half, s)) {
2779 /* range 0.25 <= a < 0.5 */
2780
2781 /* a in units of 1/512 rounded down */
2782 /* q0 = (int)(a * 512.0); */
2783 q = float64_mul(float64_512, a, s);
2784 q_int = float64_to_int64_round_to_zero(q, s);
2785
2786 /* reciprocal root r */
2787 /* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */
2788 q = int64_to_float64(q_int, s);
2789 q = float64_add(q, float64_half, s);
2790 q = float64_div(q, float64_512, s);
2791 q = float64_sqrt(q, s);
2792 q = float64_div(float64_one, q, s);
2793 } else {
2794 /* range 0.5 <= a < 1.0 */
2795
2796 /* a in units of 1/256 rounded down */
2797 /* q1 = (int)(a * 256.0); */
2798 q = float64_mul(float64_256, a, s);
2799 int64_t q_int = float64_to_int64_round_to_zero(q, s);
2800
2801 /* reciprocal root r */
2802 /* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
2803 q = int64_to_float64(q_int, s);
2804 q = float64_add(q, float64_half, s);
2805 q = float64_div(q, float64_256, s);
2806 q = float64_sqrt(q, s);
2807 q = float64_div(float64_one, q, s);
2808 }
2809 /* r in units of 1/256 rounded to nearest */
2810 /* s = (int)(256.0 * r + 0.5); */
2811
2812 q = float64_mul(q, float64_256,s );
2813 q = float64_add(q, float64_half, s);
2814 q_int = float64_to_int64_round_to_zero(q, s);
2815
2816 /* return (double)s / 256.0;*/
2817 return float64_div(int64_to_float64(q_int, s), float64_256, s);
2818 }
2819
2820 float32 HELPER(rsqrte_f32)(float32 a, CPUState *env)
2821 {
2822 float_status *s = &env->vfp.standard_fp_status;
2823 int result_exp;
2824 float64 f64;
2825 uint32_t val;
2826 uint64_t val64;
2827
2828 val = float32_val(a);
2829
2830 if (float32_is_any_nan(a)) {
2831 if (float32_is_signaling_nan(a)) {
2832 float_raise(float_flag_invalid, s);
2833 }
2834 return float32_default_nan;
2835 } else if (float32_is_zero_or_denormal(a)) {
2836 if (!float32_is_zero(a)) {
2837 float_raise(float_flag_input_denormal, s);
2838 }
2839 float_raise(float_flag_divbyzero, s);
2840 return float32_set_sign(float32_infinity, float32_is_neg(a));
2841 } else if (float32_is_neg(a)) {
2842 float_raise(float_flag_invalid, s);
2843 return float32_default_nan;
2844 } else if (float32_is_infinity(a)) {
2845 return float32_zero;
2846 }
2847
2848 /* Normalize to a double-precision value between 0.25 and 1.0,
2849 * preserving the parity of the exponent. */
2850 if ((val & 0x800000) == 0) {
2851 f64 = make_float64(((uint64_t)(val & 0x80000000) << 32)
2852 | (0x3feULL << 52)
2853 | ((uint64_t)(val & 0x7fffff) << 29));
2854 } else {
2855 f64 = make_float64(((uint64_t)(val & 0x80000000) << 32)
2856 | (0x3fdULL << 52)
2857 | ((uint64_t)(val & 0x7fffff) << 29));
2858 }
2859
2860 result_exp = (380 - ((val & 0x7f800000) >> 23)) / 2;
2861
2862 f64 = recip_sqrt_estimate(f64, env);
2863
2864 val64 = float64_val(f64);
2865
2866 val = ((val64 >> 63) & 0x80000000)
2867 | ((result_exp & 0xff) << 23)
2868 | ((val64 >> 29) & 0x7fffff);
2869 return make_float32(val);
2870 }
2871
2872 uint32_t HELPER(recpe_u32)(uint32_t a, CPUState *env)
2873 {
2874 float64 f64;
2875
2876 if ((a & 0x80000000) == 0) {
2877 return 0xffffffff;
2878 }
2879
2880 f64 = make_float64((0x3feULL << 52)
2881 | ((int64_t)(a & 0x7fffffff) << 21));
2882
2883 f64 = recip_estimate (f64, env);
2884
2885 return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
2886 }
2887
2888 uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUState *env)
2889 {
2890 float64 f64;
2891
2892 if ((a & 0xc0000000) == 0) {
2893 return 0xffffffff;
2894 }
2895
2896 if (a & 0x80000000) {
2897 f64 = make_float64((0x3feULL << 52)
2898 | ((uint64_t)(a & 0x7fffffff) << 21));
2899 } else { /* bits 31-30 == '01' */
2900 f64 = make_float64((0x3fdULL << 52)
2901 | ((uint64_t)(a & 0x3fffffff) << 22));
2902 }
2903
2904 f64 = recip_sqrt_estimate(f64, env);
2905
2906 return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
2907 }
2908
2909 void HELPER(set_teecr)(CPUState *env, uint32_t val)
2910 {
2911 val &= 1;
2912 if (env->teecr != val) {
2913 env->teecr = val;
2914 tb_flush(env);
2915 }
2916 }
Zhi Yong Wu's QEmu Source Tree - dev