root / target-arm / helper.c @ ab19b0ec
History | View | Annotate | Download (67.7 kB)
1 |
#include <stdio.h> |
---|---|
2 |
#include <stdlib.h> |
3 |
#include <string.h> |
4 |
|
5 |
#include "cpu.h" |
6 |
#include "exec-all.h" |
7 |
#include "gdbstub.h" |
8 |
#include "helpers.h" |
9 |
#include "qemu-common.h" |
10 |
|
11 |
static uint32_t cortexa8_cp15_c0_c1[8] = |
12 |
{ 0x1031, 0x11, 0x400, 0, 0x31100003, 0x20000000, 0x01202000, 0x11 }; |
13 |
|
14 |
static uint32_t cortexa8_cp15_c0_c2[8] = |
15 |
{ 0x00101111, 0x12112111, 0x21232031, 0x11112131, 0x00111142, 0, 0, 0 }; |
16 |
|
17 |
static uint32_t mpcore_cp15_c0_c1[8] = |
18 |
{ 0x111, 0x1, 0, 0x2, 0x01100103, 0x10020302, 0x01222000, 0 }; |
19 |
|
20 |
static uint32_t mpcore_cp15_c0_c2[8] = |
21 |
{ 0x00100011, 0x12002111, 0x11221011, 0x01102131, 0x141, 0, 0, 0 }; |
22 |
|
23 |
static uint32_t arm1136_cp15_c0_c1[8] = |
24 |
{ 0x111, 0x1, 0x2, 0x3, 0x01130003, 0x10030302, 0x01222110, 0 }; |
25 |
|
26 |
static uint32_t arm1136_cp15_c0_c2[8] = |
27 |
{ 0x00140011, 0x12002111, 0x11231111, 0x01102131, 0x141, 0, 0, 0 }; |
28 |
|
29 |
static uint32_t cpu_arm_find_by_name(const char *name); |
30 |
|
31 |
static inline void set_feature(CPUARMState *env, int feature) |
32 |
{ |
33 |
env->features |= 1u << feature;
|
34 |
} |
35 |
|
36 |
static void cpu_reset_model_id(CPUARMState *env, uint32_t id) |
37 |
{ |
38 |
env->cp15.c0_cpuid = id; |
39 |
switch (id) {
|
40 |
case ARM_CPUID_ARM926:
|
41 |
set_feature(env, ARM_FEATURE_VFP); |
42 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x41011090;
|
43 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
44 |
env->cp15.c1_sys = 0x00090078;
|
45 |
break;
|
46 |
case ARM_CPUID_ARM946:
|
47 |
set_feature(env, ARM_FEATURE_MPU); |
48 |
env->cp15.c0_cachetype = 0x0f004006;
|
49 |
env->cp15.c1_sys = 0x00000078;
|
50 |
break;
|
51 |
case ARM_CPUID_ARM1026:
|
52 |
set_feature(env, ARM_FEATURE_VFP); |
53 |
set_feature(env, ARM_FEATURE_AUXCR); |
54 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x410110a0;
|
55 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
56 |
env->cp15.c1_sys = 0x00090078;
|
57 |
break;
|
58 |
case ARM_CPUID_ARM1136_R2:
|
59 |
case ARM_CPUID_ARM1136:
|
60 |
set_feature(env, ARM_FEATURE_V6); |
61 |
set_feature(env, ARM_FEATURE_VFP); |
62 |
set_feature(env, ARM_FEATURE_AUXCR); |
63 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
|
64 |
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
|
65 |
env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
|
66 |
memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c1, 8 * sizeof(uint32_t)); |
67 |
memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c2, 8 * sizeof(uint32_t)); |
68 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
69 |
break;
|
70 |
case ARM_CPUID_ARM11MPCORE:
|
71 |
set_feature(env, ARM_FEATURE_V6); |
72 |
set_feature(env, ARM_FEATURE_V6K); |
73 |
set_feature(env, ARM_FEATURE_VFP); |
74 |
set_feature(env, ARM_FEATURE_AUXCR); |
75 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4;
|
76 |
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111;
|
77 |
env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000;
|
78 |
memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c1, 8 * sizeof(uint32_t)); |
79 |
memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c2, 8 * sizeof(uint32_t)); |
80 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
81 |
break;
|
82 |
case ARM_CPUID_CORTEXA8:
|
83 |
set_feature(env, ARM_FEATURE_V6); |
84 |
set_feature(env, ARM_FEATURE_V6K); |
85 |
set_feature(env, ARM_FEATURE_V7); |
86 |
set_feature(env, ARM_FEATURE_AUXCR); |
87 |
set_feature(env, ARM_FEATURE_THUMB2); |
88 |
set_feature(env, ARM_FEATURE_VFP); |
89 |
set_feature(env, ARM_FEATURE_VFP3); |
90 |
set_feature(env, ARM_FEATURE_NEON); |
91 |
env->vfp.xregs[ARM_VFP_FPSID] = 0x410330c0;
|
92 |
env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222;
|
93 |
env->vfp.xregs[ARM_VFP_MVFR1] = 0x00011100;
|
94 |
memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c1, 8 * sizeof(uint32_t)); |
95 |
memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c2, 8 * sizeof(uint32_t)); |
96 |
env->cp15.c0_cachetype = 0x1dd20d2;
|
97 |
break;
|
98 |
case ARM_CPUID_CORTEXM3:
|
99 |
set_feature(env, ARM_FEATURE_V6); |
100 |
set_feature(env, ARM_FEATURE_THUMB2); |
101 |
set_feature(env, ARM_FEATURE_V7); |
102 |
set_feature(env, ARM_FEATURE_M); |
103 |
set_feature(env, ARM_FEATURE_DIV); |
104 |
break;
|
105 |
case ARM_CPUID_ANY: /* For userspace emulation. */ |
106 |
set_feature(env, ARM_FEATURE_V6); |
107 |
set_feature(env, ARM_FEATURE_V6K); |
108 |
set_feature(env, ARM_FEATURE_V7); |
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_DIV); |
114 |
break;
|
115 |
case ARM_CPUID_TI915T:
|
116 |
case ARM_CPUID_TI925T:
|
117 |
set_feature(env, ARM_FEATURE_OMAPCP); |
118 |
env->cp15.c0_cpuid = ARM_CPUID_TI925T; /* Depends on wiring. */
|
119 |
env->cp15.c0_cachetype = 0x5109149;
|
120 |
env->cp15.c1_sys = 0x00000070;
|
121 |
env->cp15.c15_i_max = 0x000;
|
122 |
env->cp15.c15_i_min = 0xff0;
|
123 |
break;
|
124 |
case ARM_CPUID_PXA250:
|
125 |
case ARM_CPUID_PXA255:
|
126 |
case ARM_CPUID_PXA260:
|
127 |
case ARM_CPUID_PXA261:
|
128 |
case ARM_CPUID_PXA262:
|
129 |
set_feature(env, ARM_FEATURE_XSCALE); |
130 |
/* JTAG_ID is ((id << 28) | 0x09265013) */
|
131 |
env->cp15.c0_cachetype = 0xd172172;
|
132 |
env->cp15.c1_sys = 0x00000078;
|
133 |
break;
|
134 |
case ARM_CPUID_PXA270_A0:
|
135 |
case ARM_CPUID_PXA270_A1:
|
136 |
case ARM_CPUID_PXA270_B0:
|
137 |
case ARM_CPUID_PXA270_B1:
|
138 |
case ARM_CPUID_PXA270_C0:
|
139 |
case ARM_CPUID_PXA270_C5:
|
140 |
set_feature(env, ARM_FEATURE_XSCALE); |
141 |
/* JTAG_ID is ((id << 28) | 0x09265013) */
|
142 |
set_feature(env, ARM_FEATURE_IWMMXT); |
143 |
env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q'; |
144 |
env->cp15.c0_cachetype = 0xd172172;
|
145 |
env->cp15.c1_sys = 0x00000078;
|
146 |
break;
|
147 |
default:
|
148 |
cpu_abort(env, "Bad CPU ID: %x\n", id);
|
149 |
break;
|
150 |
} |
151 |
} |
152 |
|
153 |
void cpu_reset(CPUARMState *env)
|
154 |
{ |
155 |
uint32_t id; |
156 |
id = env->cp15.c0_cpuid; |
157 |
memset(env, 0, offsetof(CPUARMState, breakpoints));
|
158 |
if (id)
|
159 |
cpu_reset_model_id(env, id); |
160 |
#if defined (CONFIG_USER_ONLY)
|
161 |
env->uncached_cpsr = ARM_CPU_MODE_USR; |
162 |
env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30; |
163 |
#else
|
164 |
/* SVC mode with interrupts disabled. */
|
165 |
env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I; |
166 |
/* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is
|
167 |
clear at reset. */
|
168 |
if (IS_M(env))
|
169 |
env->uncached_cpsr &= ~CPSR_I; |
170 |
env->vfp.xregs[ARM_VFP_FPEXC] = 0;
|
171 |
#endif
|
172 |
env->regs[15] = 0; |
173 |
tlb_flush(env, 1);
|
174 |
} |
175 |
|
176 |
CPUARMState *cpu_arm_init(const char *cpu_model) |
177 |
{ |
178 |
CPUARMState *env; |
179 |
uint32_t id; |
180 |
static int inited = 0; |
181 |
|
182 |
id = cpu_arm_find_by_name(cpu_model); |
183 |
if (id == 0) |
184 |
return NULL; |
185 |
env = qemu_mallocz(sizeof(CPUARMState));
|
186 |
if (!env)
|
187 |
return NULL; |
188 |
cpu_exec_init(env); |
189 |
if (!inited) {
|
190 |
inited = 1;
|
191 |
arm_translate_init(); |
192 |
} |
193 |
|
194 |
env->cpu_model_str = cpu_model; |
195 |
env->cp15.c0_cpuid = id; |
196 |
cpu_reset(env); |
197 |
return env;
|
198 |
} |
199 |
|
200 |
struct arm_cpu_t {
|
201 |
uint32_t id; |
202 |
const char *name; |
203 |
}; |
204 |
|
205 |
static const struct arm_cpu_t arm_cpu_names[] = { |
206 |
{ ARM_CPUID_ARM926, "arm926"},
|
207 |
{ ARM_CPUID_ARM946, "arm946"},
|
208 |
{ ARM_CPUID_ARM1026, "arm1026"},
|
209 |
{ ARM_CPUID_ARM1136, "arm1136"},
|
210 |
{ ARM_CPUID_ARM1136_R2, "arm1136-r2"},
|
211 |
{ ARM_CPUID_ARM11MPCORE, "arm11mpcore"},
|
212 |
{ ARM_CPUID_CORTEXM3, "cortex-m3"},
|
213 |
{ ARM_CPUID_CORTEXA8, "cortex-a8"},
|
214 |
{ ARM_CPUID_TI925T, "ti925t" },
|
215 |
{ ARM_CPUID_PXA250, "pxa250" },
|
216 |
{ ARM_CPUID_PXA255, "pxa255" },
|
217 |
{ ARM_CPUID_PXA260, "pxa260" },
|
218 |
{ ARM_CPUID_PXA261, "pxa261" },
|
219 |
{ ARM_CPUID_PXA262, "pxa262" },
|
220 |
{ ARM_CPUID_PXA270, "pxa270" },
|
221 |
{ ARM_CPUID_PXA270_A0, "pxa270-a0" },
|
222 |
{ ARM_CPUID_PXA270_A1, "pxa270-a1" },
|
223 |
{ ARM_CPUID_PXA270_B0, "pxa270-b0" },
|
224 |
{ ARM_CPUID_PXA270_B1, "pxa270-b1" },
|
225 |
{ ARM_CPUID_PXA270_C0, "pxa270-c0" },
|
226 |
{ ARM_CPUID_PXA270_C5, "pxa270-c5" },
|
227 |
{ ARM_CPUID_ANY, "any"},
|
228 |
{ 0, NULL} |
229 |
}; |
230 |
|
231 |
void arm_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...)) |
232 |
{ |
233 |
int i;
|
234 |
|
235 |
(*cpu_fprintf)(f, "Available CPUs:\n");
|
236 |
for (i = 0; arm_cpu_names[i].name; i++) { |
237 |
(*cpu_fprintf)(f, " %s\n", arm_cpu_names[i].name);
|
238 |
} |
239 |
} |
240 |
|
241 |
/* return 0 if not found */
|
242 |
static uint32_t cpu_arm_find_by_name(const char *name) |
243 |
{ |
244 |
int i;
|
245 |
uint32_t id; |
246 |
|
247 |
id = 0;
|
248 |
for (i = 0; arm_cpu_names[i].name; i++) { |
249 |
if (strcmp(name, arm_cpu_names[i].name) == 0) { |
250 |
id = arm_cpu_names[i].id; |
251 |
break;
|
252 |
} |
253 |
} |
254 |
return id;
|
255 |
} |
256 |
|
257 |
void cpu_arm_close(CPUARMState *env)
|
258 |
{ |
259 |
free(env); |
260 |
} |
261 |
|
262 |
uint32_t cpsr_read(CPUARMState *env) |
263 |
{ |
264 |
int ZF;
|
265 |
ZF = (env->ZF == 0);
|
266 |
return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) | |
267 |
(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27) |
268 |
| (env->thumb << 5) | ((env->condexec_bits & 3) << 25) |
269 |
| ((env->condexec_bits & 0xfc) << 8) |
270 |
| (env->GE << 16);
|
271 |
} |
272 |
|
273 |
void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
|
274 |
{ |
275 |
if (mask & CPSR_NZCV) {
|
276 |
env->ZF = (~val) & CPSR_Z; |
277 |
env->NF = val; |
278 |
env->CF = (val >> 29) & 1; |
279 |
env->VF = (val << 3) & 0x80000000; |
280 |
} |
281 |
if (mask & CPSR_Q)
|
282 |
env->QF = ((val & CPSR_Q) != 0);
|
283 |
if (mask & CPSR_T)
|
284 |
env->thumb = ((val & CPSR_T) != 0);
|
285 |
if (mask & CPSR_IT_0_1) {
|
286 |
env->condexec_bits &= ~3;
|
287 |
env->condexec_bits |= (val >> 25) & 3; |
288 |
} |
289 |
if (mask & CPSR_IT_2_7) {
|
290 |
env->condexec_bits &= 3;
|
291 |
env->condexec_bits |= (val >> 8) & 0xfc; |
292 |
} |
293 |
if (mask & CPSR_GE) {
|
294 |
env->GE = (val >> 16) & 0xf; |
295 |
} |
296 |
|
297 |
if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
|
298 |
switch_mode(env, val & CPSR_M); |
299 |
} |
300 |
mask &= ~CACHED_CPSR_BITS; |
301 |
env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask); |
302 |
} |
303 |
|
304 |
/* Sign/zero extend */
|
305 |
uint32_t HELPER(sxtb16)(uint32_t x) |
306 |
{ |
307 |
uint32_t res; |
308 |
res = (uint16_t)(int8_t)x; |
309 |
res |= (uint32_t)(int8_t)(x >> 16) << 16; |
310 |
return res;
|
311 |
} |
312 |
|
313 |
uint32_t HELPER(uxtb16)(uint32_t x) |
314 |
{ |
315 |
uint32_t res; |
316 |
res = (uint16_t)(uint8_t)x; |
317 |
res |= (uint32_t)(uint8_t)(x >> 16) << 16; |
318 |
return res;
|
319 |
} |
320 |
|
321 |
uint32_t HELPER(clz)(uint32_t x) |
322 |
{ |
323 |
int count;
|
324 |
for (count = 32; x; count--) |
325 |
x >>= 1;
|
326 |
return count;
|
327 |
} |
328 |
|
329 |
int32_t HELPER(sdiv)(int32_t num, int32_t den) |
330 |
{ |
331 |
if (den == 0) |
332 |
return 0; |
333 |
return num / den;
|
334 |
} |
335 |
|
336 |
uint32_t HELPER(udiv)(uint32_t num, uint32_t den) |
337 |
{ |
338 |
if (den == 0) |
339 |
return 0; |
340 |
return num / den;
|
341 |
} |
342 |
|
343 |
uint32_t HELPER(rbit)(uint32_t x) |
344 |
{ |
345 |
x = ((x & 0xff000000) >> 24) |
346 |
| ((x & 0x00ff0000) >> 8) |
347 |
| ((x & 0x0000ff00) << 8) |
348 |
| ((x & 0x000000ff) << 24); |
349 |
x = ((x & 0xf0f0f0f0) >> 4) |
350 |
| ((x & 0x0f0f0f0f) << 4); |
351 |
x = ((x & 0x88888888) >> 3) |
352 |
| ((x & 0x44444444) >> 1) |
353 |
| ((x & 0x22222222) << 1) |
354 |
| ((x & 0x11111111) << 3); |
355 |
return x;
|
356 |
} |
357 |
|
358 |
uint32_t HELPER(abs)(uint32_t x) |
359 |
{ |
360 |
return ((int32_t)x < 0) ? -x : x; |
361 |
} |
362 |
|
363 |
#if defined(CONFIG_USER_ONLY)
|
364 |
|
365 |
void do_interrupt (CPUState *env)
|
366 |
{ |
367 |
env->exception_index = -1;
|
368 |
} |
369 |
|
370 |
/* Structure used to record exclusive memory locations. */
|
371 |
typedef struct mmon_state { |
372 |
struct mmon_state *next;
|
373 |
CPUARMState *cpu_env; |
374 |
uint32_t addr; |
375 |
} mmon_state; |
376 |
|
377 |
/* Chain of current locks. */
|
378 |
static mmon_state* mmon_head = NULL; |
379 |
|
380 |
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw, |
381 |
int mmu_idx, int is_softmmu) |
382 |
{ |
383 |
if (rw == 2) { |
384 |
env->exception_index = EXCP_PREFETCH_ABORT; |
385 |
env->cp15.c6_insn = address; |
386 |
} else {
|
387 |
env->exception_index = EXCP_DATA_ABORT; |
388 |
env->cp15.c6_data = address; |
389 |
} |
390 |
return 1; |
391 |
} |
392 |
|
393 |
static void allocate_mmon_state(CPUState *env) |
394 |
{ |
395 |
env->mmon_entry = malloc(sizeof (mmon_state));
|
396 |
if (!env->mmon_entry)
|
397 |
abort(); |
398 |
memset (env->mmon_entry, 0, sizeof (mmon_state)); |
399 |
env->mmon_entry->cpu_env = env; |
400 |
mmon_head = env->mmon_entry; |
401 |
} |
402 |
|
403 |
/* Flush any monitor locks for the specified address. */
|
404 |
static void flush_mmon(uint32_t addr) |
405 |
{ |
406 |
mmon_state *mon; |
407 |
|
408 |
for (mon = mmon_head; mon; mon = mon->next)
|
409 |
{ |
410 |
if (mon->addr != addr)
|
411 |
continue;
|
412 |
|
413 |
mon->addr = 0;
|
414 |
break;
|
415 |
} |
416 |
} |
417 |
|
418 |
/* Mark an address for exclusive access. */
|
419 |
void HELPER(mark_exclusive)(CPUState *env, uint32_t addr)
|
420 |
{ |
421 |
if (!env->mmon_entry)
|
422 |
allocate_mmon_state(env); |
423 |
/* Clear any previous locks. */
|
424 |
flush_mmon(addr); |
425 |
env->mmon_entry->addr = addr; |
426 |
} |
427 |
|
428 |
/* Test if an exclusive address is still exclusive. Returns zero
|
429 |
if the address is still exclusive. */
|
430 |
uint32_t HELPER(test_exclusive)(CPUState *env, uint32_t addr) |
431 |
{ |
432 |
int res;
|
433 |
|
434 |
if (!env->mmon_entry)
|
435 |
return 1; |
436 |
if (env->mmon_entry->addr == addr)
|
437 |
res = 0;
|
438 |
else
|
439 |
res = 1;
|
440 |
flush_mmon(addr); |
441 |
return res;
|
442 |
} |
443 |
|
444 |
void HELPER(clrex)(CPUState *env)
|
445 |
{ |
446 |
if (!(env->mmon_entry && env->mmon_entry->addr))
|
447 |
return;
|
448 |
flush_mmon(env->mmon_entry->addr); |
449 |
} |
450 |
|
451 |
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
452 |
{ |
453 |
return addr;
|
454 |
} |
455 |
|
456 |
/* These should probably raise undefined insn exceptions. */
|
457 |
void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
|
458 |
{ |
459 |
int op1 = (insn >> 8) & 0xf; |
460 |
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
|
461 |
return;
|
462 |
} |
463 |
|
464 |
uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn) |
465 |
{ |
466 |
int op1 = (insn >> 8) & 0xf; |
467 |
cpu_abort(env, "cp%i insn %08x\n", op1, insn);
|
468 |
return 0; |
469 |
} |
470 |
|
471 |
void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
|
472 |
{ |
473 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
474 |
} |
475 |
|
476 |
uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) |
477 |
{ |
478 |
cpu_abort(env, "cp15 insn %08x\n", insn);
|
479 |
return 0; |
480 |
} |
481 |
|
482 |
/* These should probably raise undefined insn exceptions. */
|
483 |
void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
|
484 |
{ |
485 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
486 |
} |
487 |
|
488 |
uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg) |
489 |
{ |
490 |
cpu_abort(env, "v7m_mrs %d\n", reg);
|
491 |
return 0; |
492 |
} |
493 |
|
494 |
void switch_mode(CPUState *env, int mode) |
495 |
{ |
496 |
if (mode != ARM_CPU_MODE_USR)
|
497 |
cpu_abort(env, "Tried to switch out of user mode\n");
|
498 |
} |
499 |
|
500 |
void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
|
501 |
{ |
502 |
cpu_abort(env, "banked r13 write\n");
|
503 |
} |
504 |
|
505 |
uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode) |
506 |
{ |
507 |
cpu_abort(env, "banked r13 read\n");
|
508 |
return 0; |
509 |
} |
510 |
|
511 |
#else
|
512 |
|
513 |
extern int semihosting_enabled; |
514 |
|
515 |
/* Map CPU modes onto saved register banks. */
|
516 |
static inline int bank_number (int mode) |
517 |
{ |
518 |
switch (mode) {
|
519 |
case ARM_CPU_MODE_USR:
|
520 |
case ARM_CPU_MODE_SYS:
|
521 |
return 0; |
522 |
case ARM_CPU_MODE_SVC:
|
523 |
return 1; |
524 |
case ARM_CPU_MODE_ABT:
|
525 |
return 2; |
526 |
case ARM_CPU_MODE_UND:
|
527 |
return 3; |
528 |
case ARM_CPU_MODE_IRQ:
|
529 |
return 4; |
530 |
case ARM_CPU_MODE_FIQ:
|
531 |
return 5; |
532 |
} |
533 |
cpu_abort(cpu_single_env, "Bad mode %x\n", mode);
|
534 |
return -1; |
535 |
} |
536 |
|
537 |
void switch_mode(CPUState *env, int mode) |
538 |
{ |
539 |
int old_mode;
|
540 |
int i;
|
541 |
|
542 |
old_mode = env->uncached_cpsr & CPSR_M; |
543 |
if (mode == old_mode)
|
544 |
return;
|
545 |
|
546 |
if (old_mode == ARM_CPU_MODE_FIQ) {
|
547 |
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
548 |
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); |
549 |
} else if (mode == ARM_CPU_MODE_FIQ) { |
550 |
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); |
551 |
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); |
552 |
} |
553 |
|
554 |
i = bank_number(old_mode); |
555 |
env->banked_r13[i] = env->regs[13];
|
556 |
env->banked_r14[i] = env->regs[14];
|
557 |
env->banked_spsr[i] = env->spsr; |
558 |
|
559 |
i = bank_number(mode); |
560 |
env->regs[13] = env->banked_r13[i];
|
561 |
env->regs[14] = env->banked_r14[i];
|
562 |
env->spsr = env->banked_spsr[i]; |
563 |
} |
564 |
|
565 |
static void v7m_push(CPUARMState *env, uint32_t val) |
566 |
{ |
567 |
env->regs[13] -= 4; |
568 |
stl_phys(env->regs[13], val);
|
569 |
} |
570 |
|
571 |
static uint32_t v7m_pop(CPUARMState *env)
|
572 |
{ |
573 |
uint32_t val; |
574 |
val = ldl_phys(env->regs[13]);
|
575 |
env->regs[13] += 4; |
576 |
return val;
|
577 |
} |
578 |
|
579 |
/* Switch to V7M main or process stack pointer. */
|
580 |
static void switch_v7m_sp(CPUARMState *env, int process) |
581 |
{ |
582 |
uint32_t tmp; |
583 |
if (env->v7m.current_sp != process) {
|
584 |
tmp = env->v7m.other_sp; |
585 |
env->v7m.other_sp = env->regs[13];
|
586 |
env->regs[13] = tmp;
|
587 |
env->v7m.current_sp = process; |
588 |
} |
589 |
} |
590 |
|
591 |
static void do_v7m_exception_exit(CPUARMState *env) |
592 |
{ |
593 |
uint32_t type; |
594 |
uint32_t xpsr; |
595 |
|
596 |
type = env->regs[15];
|
597 |
if (env->v7m.exception != 0) |
598 |
armv7m_nvic_complete_irq(env->v7m.nvic, env->v7m.exception); |
599 |
|
600 |
/* Switch to the target stack. */
|
601 |
switch_v7m_sp(env, (type & 4) != 0); |
602 |
/* Pop registers. */
|
603 |
env->regs[0] = v7m_pop(env);
|
604 |
env->regs[1] = v7m_pop(env);
|
605 |
env->regs[2] = v7m_pop(env);
|
606 |
env->regs[3] = v7m_pop(env);
|
607 |
env->regs[12] = v7m_pop(env);
|
608 |
env->regs[14] = v7m_pop(env);
|
609 |
env->regs[15] = v7m_pop(env);
|
610 |
xpsr = v7m_pop(env); |
611 |
xpsr_write(env, xpsr, 0xfffffdff);
|
612 |
/* Undo stack alignment. */
|
613 |
if (xpsr & 0x200) |
614 |
env->regs[13] |= 4; |
615 |
/* ??? The exception return type specifies Thread/Handler mode. However
|
616 |
this is also implied by the xPSR value. Not sure what to do
|
617 |
if there is a mismatch. */
|
618 |
/* ??? Likewise for mismatches between the CONTROL register and the stack
|
619 |
pointer. */
|
620 |
} |
621 |
|
622 |
void do_interrupt_v7m(CPUARMState *env)
|
623 |
{ |
624 |
uint32_t xpsr = xpsr_read(env); |
625 |
uint32_t lr; |
626 |
uint32_t addr; |
627 |
|
628 |
lr = 0xfffffff1;
|
629 |
if (env->v7m.current_sp)
|
630 |
lr |= 4;
|
631 |
if (env->v7m.exception == 0) |
632 |
lr |= 8;
|
633 |
|
634 |
/* For exceptions we just mark as pending on the NVIC, and let that
|
635 |
handle it. */
|
636 |
/* TODO: Need to escalate if the current priority is higher than the
|
637 |
one we're raising. */
|
638 |
switch (env->exception_index) {
|
639 |
case EXCP_UDEF:
|
640 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_USAGE); |
641 |
return;
|
642 |
case EXCP_SWI:
|
643 |
env->regs[15] += 2; |
644 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_SVC); |
645 |
return;
|
646 |
case EXCP_PREFETCH_ABORT:
|
647 |
case EXCP_DATA_ABORT:
|
648 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_MEM); |
649 |
return;
|
650 |
case EXCP_BKPT:
|
651 |
if (semihosting_enabled) {
|
652 |
int nr;
|
653 |
nr = lduw_code(env->regs[15]) & 0xff; |
654 |
if (nr == 0xab) { |
655 |
env->regs[15] += 2; |
656 |
env->regs[0] = do_arm_semihosting(env);
|
657 |
return;
|
658 |
} |
659 |
} |
660 |
armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_DEBUG); |
661 |
return;
|
662 |
case EXCP_IRQ:
|
663 |
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->v7m.nvic); |
664 |
break;
|
665 |
case EXCP_EXCEPTION_EXIT:
|
666 |
do_v7m_exception_exit(env); |
667 |
return;
|
668 |
default:
|
669 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
670 |
return; /* Never happens. Keep compiler happy. */ |
671 |
} |
672 |
|
673 |
/* Align stack pointer. */
|
674 |
/* ??? Should only do this if Configuration Control Register
|
675 |
STACKALIGN bit is set. */
|
676 |
if (env->regs[13] & 4) { |
677 |
env->regs[13] -= 4; |
678 |
xpsr |= 0x200;
|
679 |
} |
680 |
/* Switch to the handler mode. */
|
681 |
v7m_push(env, xpsr); |
682 |
v7m_push(env, env->regs[15]);
|
683 |
v7m_push(env, env->regs[14]);
|
684 |
v7m_push(env, env->regs[12]);
|
685 |
v7m_push(env, env->regs[3]);
|
686 |
v7m_push(env, env->regs[2]);
|
687 |
v7m_push(env, env->regs[1]);
|
688 |
v7m_push(env, env->regs[0]);
|
689 |
switch_v7m_sp(env, 0);
|
690 |
env->uncached_cpsr &= ~CPSR_IT; |
691 |
env->regs[14] = lr;
|
692 |
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
|
693 |
env->regs[15] = addr & 0xfffffffe; |
694 |
env->thumb = addr & 1;
|
695 |
} |
696 |
|
697 |
/* Handle a CPU exception. */
|
698 |
void do_interrupt(CPUARMState *env)
|
699 |
{ |
700 |
uint32_t addr; |
701 |
uint32_t mask; |
702 |
int new_mode;
|
703 |
uint32_t offset; |
704 |
|
705 |
if (IS_M(env)) {
|
706 |
do_interrupt_v7m(env); |
707 |
return;
|
708 |
} |
709 |
/* TODO: Vectored interrupt controller. */
|
710 |
switch (env->exception_index) {
|
711 |
case EXCP_UDEF:
|
712 |
new_mode = ARM_CPU_MODE_UND; |
713 |
addr = 0x04;
|
714 |
mask = CPSR_I; |
715 |
if (env->thumb)
|
716 |
offset = 2;
|
717 |
else
|
718 |
offset = 4;
|
719 |
break;
|
720 |
case EXCP_SWI:
|
721 |
if (semihosting_enabled) {
|
722 |
/* Check for semihosting interrupt. */
|
723 |
if (env->thumb) {
|
724 |
mask = lduw_code(env->regs[15] - 2) & 0xff; |
725 |
} else {
|
726 |
mask = ldl_code(env->regs[15] - 4) & 0xffffff; |
727 |
} |
728 |
/* Only intercept calls from privileged modes, to provide some
|
729 |
semblance of security. */
|
730 |
if (((mask == 0x123456 && !env->thumb) |
731 |
|| (mask == 0xab && env->thumb))
|
732 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { |
733 |
env->regs[0] = do_arm_semihosting(env);
|
734 |
return;
|
735 |
} |
736 |
} |
737 |
new_mode = ARM_CPU_MODE_SVC; |
738 |
addr = 0x08;
|
739 |
mask = CPSR_I; |
740 |
/* The PC already points to the next instruction. */
|
741 |
offset = 0;
|
742 |
break;
|
743 |
case EXCP_BKPT:
|
744 |
/* See if this is a semihosting syscall. */
|
745 |
if (env->thumb && semihosting_enabled) {
|
746 |
mask = lduw_code(env->regs[15]) & 0xff; |
747 |
if (mask == 0xab |
748 |
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { |
749 |
env->regs[15] += 2; |
750 |
env->regs[0] = do_arm_semihosting(env);
|
751 |
return;
|
752 |
} |
753 |
} |
754 |
/* Fall through to prefetch abort. */
|
755 |
case EXCP_PREFETCH_ABORT:
|
756 |
new_mode = ARM_CPU_MODE_ABT; |
757 |
addr = 0x0c;
|
758 |
mask = CPSR_A | CPSR_I; |
759 |
offset = 4;
|
760 |
break;
|
761 |
case EXCP_DATA_ABORT:
|
762 |
new_mode = ARM_CPU_MODE_ABT; |
763 |
addr = 0x10;
|
764 |
mask = CPSR_A | CPSR_I; |
765 |
offset = 8;
|
766 |
break;
|
767 |
case EXCP_IRQ:
|
768 |
new_mode = ARM_CPU_MODE_IRQ; |
769 |
addr = 0x18;
|
770 |
/* Disable IRQ and imprecise data aborts. */
|
771 |
mask = CPSR_A | CPSR_I; |
772 |
offset = 4;
|
773 |
break;
|
774 |
case EXCP_FIQ:
|
775 |
new_mode = ARM_CPU_MODE_FIQ; |
776 |
addr = 0x1c;
|
777 |
/* Disable FIQ, IRQ and imprecise data aborts. */
|
778 |
mask = CPSR_A | CPSR_I | CPSR_F; |
779 |
offset = 4;
|
780 |
break;
|
781 |
default:
|
782 |
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
|
783 |
return; /* Never happens. Keep compiler happy. */ |
784 |
} |
785 |
/* High vectors. */
|
786 |
if (env->cp15.c1_sys & (1 << 13)) { |
787 |
addr += 0xffff0000;
|
788 |
} |
789 |
switch_mode (env, new_mode); |
790 |
env->spsr = cpsr_read(env); |
791 |
/* Clear IT bits. */
|
792 |
env->condexec_bits = 0;
|
793 |
/* Switch to the new mode, and switch to Arm mode. */
|
794 |
/* ??? Thumb interrupt handlers not implemented. */
|
795 |
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode; |
796 |
env->uncached_cpsr |= mask; |
797 |
env->thumb = 0;
|
798 |
env->regs[14] = env->regs[15] + offset; |
799 |
env->regs[15] = addr;
|
800 |
env->interrupt_request |= CPU_INTERRUPT_EXITTB; |
801 |
} |
802 |
|
803 |
/* Check section/page access permissions.
|
804 |
Returns the page protection flags, or zero if the access is not
|
805 |
permitted. */
|
806 |
static inline int check_ap(CPUState *env, int ap, int domain, int access_type, |
807 |
int is_user)
|
808 |
{ |
809 |
int prot_ro;
|
810 |
|
811 |
if (domain == 3) |
812 |
return PAGE_READ | PAGE_WRITE;
|
813 |
|
814 |
if (access_type == 1) |
815 |
prot_ro = 0;
|
816 |
else
|
817 |
prot_ro = PAGE_READ; |
818 |
|
819 |
switch (ap) {
|
820 |
case 0: |
821 |
if (access_type == 1) |
822 |
return 0; |
823 |
switch ((env->cp15.c1_sys >> 8) & 3) { |
824 |
case 1: |
825 |
return is_user ? 0 : PAGE_READ; |
826 |
case 2: |
827 |
return PAGE_READ;
|
828 |
default:
|
829 |
return 0; |
830 |
} |
831 |
case 1: |
832 |
return is_user ? 0 : PAGE_READ | PAGE_WRITE; |
833 |
case 2: |
834 |
if (is_user)
|
835 |
return prot_ro;
|
836 |
else
|
837 |
return PAGE_READ | PAGE_WRITE;
|
838 |
case 3: |
839 |
return PAGE_READ | PAGE_WRITE;
|
840 |
case 4: case 7: /* Reserved. */ |
841 |
return 0; |
842 |
case 5: |
843 |
return is_user ? 0 : prot_ro; |
844 |
case 6: |
845 |
return prot_ro;
|
846 |
default:
|
847 |
abort(); |
848 |
} |
849 |
} |
850 |
|
851 |
static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type, |
852 |
int is_user, uint32_t *phys_ptr, int *prot) |
853 |
{ |
854 |
int code;
|
855 |
uint32_t table; |
856 |
uint32_t desc; |
857 |
int type;
|
858 |
int ap;
|
859 |
int domain;
|
860 |
uint32_t phys_addr; |
861 |
|
862 |
/* Pagetable walk. */
|
863 |
/* Lookup l1 descriptor. */
|
864 |
if (address & env->cp15.c2_mask)
|
865 |
table = env->cp15.c2_base1; |
866 |
else
|
867 |
table = env->cp15.c2_base0; |
868 |
table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc); |
869 |
desc = ldl_phys(table); |
870 |
type = (desc & 3);
|
871 |
domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3; |
872 |
if (type == 0) { |
873 |
/* Section translation fault. */
|
874 |
code = 5;
|
875 |
goto do_fault;
|
876 |
} |
877 |
if (domain == 0 || domain == 2) { |
878 |
if (type == 2) |
879 |
code = 9; /* Section domain fault. */ |
880 |
else
|
881 |
code = 11; /* Page domain fault. */ |
882 |
goto do_fault;
|
883 |
} |
884 |
if (type == 2) { |
885 |
/* 1Mb section. */
|
886 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
887 |
ap = (desc >> 10) & 3; |
888 |
code = 13;
|
889 |
} else {
|
890 |
/* Lookup l2 entry. */
|
891 |
if (type == 1) { |
892 |
/* Coarse pagetable. */
|
893 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
894 |
} else {
|
895 |
/* Fine pagetable. */
|
896 |
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc); |
897 |
} |
898 |
desc = ldl_phys(table); |
899 |
switch (desc & 3) { |
900 |
case 0: /* Page translation fault. */ |
901 |
code = 7;
|
902 |
goto do_fault;
|
903 |
case 1: /* 64k page. */ |
904 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
905 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
906 |
break;
|
907 |
case 2: /* 4k page. */ |
908 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
909 |
ap = (desc >> (4 + ((address >> 13) & 6))) & 3; |
910 |
break;
|
911 |
case 3: /* 1k page. */ |
912 |
if (type == 1) { |
913 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
914 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
915 |
} else {
|
916 |
/* Page translation fault. */
|
917 |
code = 7;
|
918 |
goto do_fault;
|
919 |
} |
920 |
} else {
|
921 |
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff); |
922 |
} |
923 |
ap = (desc >> 4) & 3; |
924 |
break;
|
925 |
default:
|
926 |
/* Never happens, but compiler isn't smart enough to tell. */
|
927 |
abort(); |
928 |
} |
929 |
code = 15;
|
930 |
} |
931 |
*prot = check_ap(env, ap, domain, access_type, is_user); |
932 |
if (!*prot) {
|
933 |
/* Access permission fault. */
|
934 |
goto do_fault;
|
935 |
} |
936 |
*phys_ptr = phys_addr; |
937 |
return 0; |
938 |
do_fault:
|
939 |
return code | (domain << 4); |
940 |
} |
941 |
|
942 |
static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type, |
943 |
int is_user, uint32_t *phys_ptr, int *prot) |
944 |
{ |
945 |
int code;
|
946 |
uint32_t table; |
947 |
uint32_t desc; |
948 |
uint32_t xn; |
949 |
int type;
|
950 |
int ap;
|
951 |
int domain;
|
952 |
uint32_t phys_addr; |
953 |
|
954 |
/* Pagetable walk. */
|
955 |
/* Lookup l1 descriptor. */
|
956 |
if (address & env->cp15.c2_mask)
|
957 |
table = env->cp15.c2_base1; |
958 |
else
|
959 |
table = env->cp15.c2_base0; |
960 |
table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc); |
961 |
desc = ldl_phys(table); |
962 |
type = (desc & 3);
|
963 |
if (type == 0) { |
964 |
/* Section translation fault. */
|
965 |
code = 5;
|
966 |
domain = 0;
|
967 |
goto do_fault;
|
968 |
} else if (type == 2 && (desc & (1 << 18))) { |
969 |
/* Supersection. */
|
970 |
domain = 0;
|
971 |
} else {
|
972 |
/* Section or page. */
|
973 |
domain = (desc >> 4) & 0x1e; |
974 |
} |
975 |
domain = (env->cp15.c3 >> domain) & 3;
|
976 |
if (domain == 0 || domain == 2) { |
977 |
if (type == 2) |
978 |
code = 9; /* Section domain fault. */ |
979 |
else
|
980 |
code = 11; /* Page domain fault. */ |
981 |
goto do_fault;
|
982 |
} |
983 |
if (type == 2) { |
984 |
if (desc & (1 << 18)) { |
985 |
/* Supersection. */
|
986 |
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff); |
987 |
} else {
|
988 |
/* Section. */
|
989 |
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); |
990 |
} |
991 |
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4); |
992 |
xn = desc & (1 << 4); |
993 |
code = 13;
|
994 |
} else {
|
995 |
/* Lookup l2 entry. */
|
996 |
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); |
997 |
desc = ldl_phys(table); |
998 |
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4); |
999 |
switch (desc & 3) { |
1000 |
case 0: /* Page translation fault. */ |
1001 |
code = 7;
|
1002 |
goto do_fault;
|
1003 |
case 1: /* 64k page. */ |
1004 |
phys_addr = (desc & 0xffff0000) | (address & 0xffff); |
1005 |
xn = desc & (1 << 15); |
1006 |
break;
|
1007 |
case 2: case 3: /* 4k page. */ |
1008 |
phys_addr = (desc & 0xfffff000) | (address & 0xfff); |
1009 |
xn = desc & 1;
|
1010 |
break;
|
1011 |
default:
|
1012 |
/* Never happens, but compiler isn't smart enough to tell. */
|
1013 |
abort(); |
1014 |
} |
1015 |
code = 15;
|
1016 |
} |
1017 |
if (xn && access_type == 2) |
1018 |
goto do_fault;
|
1019 |
|
1020 |
*prot = check_ap(env, ap, domain, access_type, is_user); |
1021 |
if (!*prot) {
|
1022 |
/* Access permission fault. */
|
1023 |
goto do_fault;
|
1024 |
} |
1025 |
*phys_ptr = phys_addr; |
1026 |
return 0; |
1027 |
do_fault:
|
1028 |
return code | (domain << 4); |
1029 |
} |
1030 |
|
1031 |
static int get_phys_addr_mpu(CPUState *env, uint32_t address, int access_type, |
1032 |
int is_user, uint32_t *phys_ptr, int *prot) |
1033 |
{ |
1034 |
int n;
|
1035 |
uint32_t mask; |
1036 |
uint32_t base; |
1037 |
|
1038 |
*phys_ptr = address; |
1039 |
for (n = 7; n >= 0; n--) { |
1040 |
base = env->cp15.c6_region[n]; |
1041 |
if ((base & 1) == 0) |
1042 |
continue;
|
1043 |
mask = 1 << ((base >> 1) & 0x1f); |
1044 |
/* Keep this shift separate from the above to avoid an
|
1045 |
(undefined) << 32. */
|
1046 |
mask = (mask << 1) - 1; |
1047 |
if (((base ^ address) & ~mask) == 0) |
1048 |
break;
|
1049 |
} |
1050 |
if (n < 0) |
1051 |
return 2; |
1052 |
|
1053 |
if (access_type == 2) { |
1054 |
mask = env->cp15.c5_insn; |
1055 |
} else {
|
1056 |
mask = env->cp15.c5_data; |
1057 |
} |
1058 |
mask = (mask >> (n * 4)) & 0xf; |
1059 |
switch (mask) {
|
1060 |
case 0: |
1061 |
return 1; |
1062 |
case 1: |
1063 |
if (is_user)
|
1064 |
return 1; |
1065 |
*prot = PAGE_READ | PAGE_WRITE; |
1066 |
break;
|
1067 |
case 2: |
1068 |
*prot = PAGE_READ; |
1069 |
if (!is_user)
|
1070 |
*prot |= PAGE_WRITE; |
1071 |
break;
|
1072 |
case 3: |
1073 |
*prot = PAGE_READ | PAGE_WRITE; |
1074 |
break;
|
1075 |
case 5: |
1076 |
if (is_user)
|
1077 |
return 1; |
1078 |
*prot = PAGE_READ; |
1079 |
break;
|
1080 |
case 6: |
1081 |
*prot = PAGE_READ; |
1082 |
break;
|
1083 |
default:
|
1084 |
/* Bad permission. */
|
1085 |
return 1; |
1086 |
} |
1087 |
return 0; |
1088 |
} |
1089 |
|
1090 |
static inline int get_phys_addr(CPUState *env, uint32_t address, |
1091 |
int access_type, int is_user, |
1092 |
uint32_t *phys_ptr, int *prot)
|
1093 |
{ |
1094 |
/* Fast Context Switch Extension. */
|
1095 |
if (address < 0x02000000) |
1096 |
address += env->cp15.c13_fcse; |
1097 |
|
1098 |
if ((env->cp15.c1_sys & 1) == 0) { |
1099 |
/* MMU/MPU disabled. */
|
1100 |
*phys_ptr = address; |
1101 |
*prot = PAGE_READ | PAGE_WRITE; |
1102 |
return 0; |
1103 |
} else if (arm_feature(env, ARM_FEATURE_MPU)) { |
1104 |
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
|
1105 |
prot); |
1106 |
} else if (env->cp15.c1_sys & (1 << 23)) { |
1107 |
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
|
1108 |
prot); |
1109 |
} else {
|
1110 |
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
|
1111 |
prot); |
1112 |
} |
1113 |
} |
1114 |
|
1115 |
int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address,
|
1116 |
int access_type, int mmu_idx, int is_softmmu) |
1117 |
{ |
1118 |
uint32_t phys_addr; |
1119 |
int prot;
|
1120 |
int ret, is_user;
|
1121 |
|
1122 |
is_user = mmu_idx == MMU_USER_IDX; |
1123 |
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot); |
1124 |
if (ret == 0) { |
1125 |
/* Map a single [sub]page. */
|
1126 |
phys_addr &= ~(uint32_t)0x3ff;
|
1127 |
address &= ~(uint32_t)0x3ff;
|
1128 |
return tlb_set_page (env, address, phys_addr, prot, mmu_idx,
|
1129 |
is_softmmu); |
1130 |
} |
1131 |
|
1132 |
if (access_type == 2) { |
1133 |
env->cp15.c5_insn = ret; |
1134 |
env->cp15.c6_insn = address; |
1135 |
env->exception_index = EXCP_PREFETCH_ABORT; |
1136 |
} else {
|
1137 |
env->cp15.c5_data = ret; |
1138 |
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) |
1139 |
env->cp15.c5_data |= (1 << 11); |
1140 |
env->cp15.c6_data = address; |
1141 |
env->exception_index = EXCP_DATA_ABORT; |
1142 |
} |
1143 |
return 1; |
1144 |
} |
1145 |
|
1146 |
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
1147 |
{ |
1148 |
uint32_t phys_addr; |
1149 |
int prot;
|
1150 |
int ret;
|
1151 |
|
1152 |
ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot); |
1153 |
|
1154 |
if (ret != 0) |
1155 |
return -1; |
1156 |
|
1157 |
return phys_addr;
|
1158 |
} |
1159 |
|
1160 |
/* Not really implemented. Need to figure out a sane way of doing this.
|
1161 |
Maybe add generic watchpoint support and use that. */
|
1162 |
|
1163 |
void HELPER(mark_exclusive)(CPUState *env, uint32_t addr)
|
1164 |
{ |
1165 |
env->mmon_addr = addr; |
1166 |
} |
1167 |
|
1168 |
uint32_t HELPER(test_exclusive)(CPUState *env, uint32_t addr) |
1169 |
{ |
1170 |
return (env->mmon_addr != addr);
|
1171 |
} |
1172 |
|
1173 |
void HELPER(clrex)(CPUState *env)
|
1174 |
{ |
1175 |
env->mmon_addr = -1;
|
1176 |
} |
1177 |
|
1178 |
void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val)
|
1179 |
{ |
1180 |
int cp_num = (insn >> 8) & 0xf; |
1181 |
int cp_info = (insn >> 5) & 7; |
1182 |
int src = (insn >> 16) & 0xf; |
1183 |
int operand = insn & 0xf; |
1184 |
|
1185 |
if (env->cp[cp_num].cp_write)
|
1186 |
env->cp[cp_num].cp_write(env->cp[cp_num].opaque, |
1187 |
cp_info, src, operand, val); |
1188 |
} |
1189 |
|
1190 |
uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn) |
1191 |
{ |
1192 |
int cp_num = (insn >> 8) & 0xf; |
1193 |
int cp_info = (insn >> 5) & 7; |
1194 |
int dest = (insn >> 16) & 0xf; |
1195 |
int operand = insn & 0xf; |
1196 |
|
1197 |
if (env->cp[cp_num].cp_read)
|
1198 |
return env->cp[cp_num].cp_read(env->cp[cp_num].opaque,
|
1199 |
cp_info, dest, operand); |
1200 |
return 0; |
1201 |
} |
1202 |
|
1203 |
/* Return basic MPU access permission bits. */
|
1204 |
static uint32_t simple_mpu_ap_bits(uint32_t val)
|
1205 |
{ |
1206 |
uint32_t ret; |
1207 |
uint32_t mask; |
1208 |
int i;
|
1209 |
ret = 0;
|
1210 |
mask = 3;
|
1211 |
for (i = 0; i < 16; i += 2) { |
1212 |
ret |= (val >> i) & mask; |
1213 |
mask <<= 2;
|
1214 |
} |
1215 |
return ret;
|
1216 |
} |
1217 |
|
1218 |
/* Pad basic MPU access permission bits to extended format. */
|
1219 |
static uint32_t extended_mpu_ap_bits(uint32_t val)
|
1220 |
{ |
1221 |
uint32_t ret; |
1222 |
uint32_t mask; |
1223 |
int i;
|
1224 |
ret = 0;
|
1225 |
mask = 3;
|
1226 |
for (i = 0; i < 16; i += 2) { |
1227 |
ret |= (val & mask) << i; |
1228 |
mask <<= 2;
|
1229 |
} |
1230 |
return ret;
|
1231 |
} |
1232 |
|
1233 |
void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val)
|
1234 |
{ |
1235 |
int op1;
|
1236 |
int op2;
|
1237 |
int crm;
|
1238 |
|
1239 |
op1 = (insn >> 21) & 7; |
1240 |
op2 = (insn >> 5) & 7; |
1241 |
crm = insn & 0xf;
|
1242 |
switch ((insn >> 16) & 0xf) { |
1243 |
case 0: |
1244 |
if (((insn >> 21) & 7) == 2) { |
1245 |
/* ??? Select cache level. Ignore. */
|
1246 |
return;
|
1247 |
} |
1248 |
/* ID codes. */
|
1249 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1250 |
break;
|
1251 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1252 |
break;
|
1253 |
goto bad_reg;
|
1254 |
case 1: /* System configuration. */ |
1255 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1256 |
op2 = 0;
|
1257 |
switch (op2) {
|
1258 |
case 0: |
1259 |
if (!arm_feature(env, ARM_FEATURE_XSCALE) || crm == 0) |
1260 |
env->cp15.c1_sys = val; |
1261 |
/* ??? Lots of these bits are not implemented. */
|
1262 |
/* This may enable/disable the MMU, so do a TLB flush. */
|
1263 |
tlb_flush(env, 1);
|
1264 |
break;
|
1265 |
case 1: /* Auxiliary cotrol register. */ |
1266 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1267 |
env->cp15.c1_xscaleauxcr = val; |
1268 |
break;
|
1269 |
} |
1270 |
/* Not implemented. */
|
1271 |
break;
|
1272 |
case 2: |
1273 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1274 |
goto bad_reg;
|
1275 |
env->cp15.c1_coproc = val; |
1276 |
/* ??? Is this safe when called from within a TB? */
|
1277 |
tb_flush(env); |
1278 |
break;
|
1279 |
default:
|
1280 |
goto bad_reg;
|
1281 |
} |
1282 |
break;
|
1283 |
case 2: /* MMU Page table control / MPU cache control. */ |
1284 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1285 |
switch (op2) {
|
1286 |
case 0: |
1287 |
env->cp15.c2_data = val; |
1288 |
break;
|
1289 |
case 1: |
1290 |
env->cp15.c2_insn = val; |
1291 |
break;
|
1292 |
default:
|
1293 |
goto bad_reg;
|
1294 |
} |
1295 |
} else {
|
1296 |
switch (op2) {
|
1297 |
case 0: |
1298 |
env->cp15.c2_base0 = val; |
1299 |
break;
|
1300 |
case 1: |
1301 |
env->cp15.c2_base1 = val; |
1302 |
break;
|
1303 |
case 2: |
1304 |
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val);
|
1305 |
break;
|
1306 |
default:
|
1307 |
goto bad_reg;
|
1308 |
} |
1309 |
} |
1310 |
break;
|
1311 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
1312 |
env->cp15.c3 = val; |
1313 |
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */ |
1314 |
break;
|
1315 |
case 4: /* Reserved. */ |
1316 |
goto bad_reg;
|
1317 |
case 5: /* MMU Fault status / MPU access permission. */ |
1318 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1319 |
op2 = 0;
|
1320 |
switch (op2) {
|
1321 |
case 0: |
1322 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1323 |
val = extended_mpu_ap_bits(val); |
1324 |
env->cp15.c5_data = val; |
1325 |
break;
|
1326 |
case 1: |
1327 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1328 |
val = extended_mpu_ap_bits(val); |
1329 |
env->cp15.c5_insn = val; |
1330 |
break;
|
1331 |
case 2: |
1332 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1333 |
goto bad_reg;
|
1334 |
env->cp15.c5_data = val; |
1335 |
break;
|
1336 |
case 3: |
1337 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1338 |
goto bad_reg;
|
1339 |
env->cp15.c5_insn = val; |
1340 |
break;
|
1341 |
default:
|
1342 |
goto bad_reg;
|
1343 |
} |
1344 |
break;
|
1345 |
case 6: /* MMU Fault address / MPU base/size. */ |
1346 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1347 |
if (crm >= 8) |
1348 |
goto bad_reg;
|
1349 |
env->cp15.c6_region[crm] = val; |
1350 |
} else {
|
1351 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1352 |
op2 = 0;
|
1353 |
switch (op2) {
|
1354 |
case 0: |
1355 |
env->cp15.c6_data = val; |
1356 |
break;
|
1357 |
case 1: /* ??? This is WFAR on armv6 */ |
1358 |
case 2: |
1359 |
env->cp15.c6_insn = val; |
1360 |
break;
|
1361 |
default:
|
1362 |
goto bad_reg;
|
1363 |
} |
1364 |
} |
1365 |
break;
|
1366 |
case 7: /* Cache control. */ |
1367 |
env->cp15.c15_i_max = 0x000;
|
1368 |
env->cp15.c15_i_min = 0xff0;
|
1369 |
/* No cache, so nothing to do. */
|
1370 |
/* ??? MPCore has VA to PA translation functions. */
|
1371 |
break;
|
1372 |
case 8: /* MMU TLB control. */ |
1373 |
switch (op2) {
|
1374 |
case 0: /* Invalidate all. */ |
1375 |
tlb_flush(env, 0);
|
1376 |
break;
|
1377 |
case 1: /* Invalidate single TLB entry. */ |
1378 |
#if 0
|
1379 |
/* ??? This is wrong for large pages and sections. */
|
1380 |
/* As an ugly hack to make linux work we always flush a 4K
|
1381 |
pages. */
|
1382 |
val &= 0xfffff000;
|
1383 |
tlb_flush_page(env, val);
|
1384 |
tlb_flush_page(env, val + 0x400);
|
1385 |
tlb_flush_page(env, val + 0x800);
|
1386 |
tlb_flush_page(env, val + 0xc00);
|
1387 |
#else
|
1388 |
tlb_flush(env, 1);
|
1389 |
#endif
|
1390 |
break;
|
1391 |
case 2: /* Invalidate on ASID. */ |
1392 |
tlb_flush(env, val == 0);
|
1393 |
break;
|
1394 |
case 3: /* Invalidate single entry on MVA. */ |
1395 |
/* ??? This is like case 1, but ignores ASID. */
|
1396 |
tlb_flush(env, 1);
|
1397 |
break;
|
1398 |
default:
|
1399 |
goto bad_reg;
|
1400 |
} |
1401 |
break;
|
1402 |
case 9: |
1403 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1404 |
break;
|
1405 |
switch (crm) {
|
1406 |
case 0: /* Cache lockdown. */ |
1407 |
switch (op1) {
|
1408 |
case 0: /* L1 cache. */ |
1409 |
switch (op2) {
|
1410 |
case 0: |
1411 |
env->cp15.c9_data = val; |
1412 |
break;
|
1413 |
case 1: |
1414 |
env->cp15.c9_insn = val; |
1415 |
break;
|
1416 |
default:
|
1417 |
goto bad_reg;
|
1418 |
} |
1419 |
break;
|
1420 |
case 1: /* L2 cache. */ |
1421 |
/* Ignore writes to L2 lockdown/auxiliary registers. */
|
1422 |
break;
|
1423 |
default:
|
1424 |
goto bad_reg;
|
1425 |
} |
1426 |
break;
|
1427 |
case 1: /* TCM memory region registers. */ |
1428 |
/* Not implemented. */
|
1429 |
goto bad_reg;
|
1430 |
default:
|
1431 |
goto bad_reg;
|
1432 |
} |
1433 |
break;
|
1434 |
case 10: /* MMU TLB lockdown. */ |
1435 |
/* ??? TLB lockdown not implemented. */
|
1436 |
break;
|
1437 |
case 12: /* Reserved. */ |
1438 |
goto bad_reg;
|
1439 |
case 13: /* Process ID. */ |
1440 |
switch (op2) {
|
1441 |
case 0: |
1442 |
/* Unlike real hardware the qemu TLB uses virtual addresses,
|
1443 |
not modified virtual addresses, so this causes a TLB flush.
|
1444 |
*/
|
1445 |
if (env->cp15.c13_fcse != val)
|
1446 |
tlb_flush(env, 1);
|
1447 |
env->cp15.c13_fcse = val; |
1448 |
break;
|
1449 |
case 1: |
1450 |
/* This changes the ASID, so do a TLB flush. */
|
1451 |
if (env->cp15.c13_context != val
|
1452 |
&& !arm_feature(env, ARM_FEATURE_MPU)) |
1453 |
tlb_flush(env, 0);
|
1454 |
env->cp15.c13_context = val; |
1455 |
break;
|
1456 |
case 2: |
1457 |
env->cp15.c13_tls1 = val; |
1458 |
break;
|
1459 |
case 3: |
1460 |
env->cp15.c13_tls2 = val; |
1461 |
break;
|
1462 |
case 4: |
1463 |
env->cp15.c13_tls3 = val; |
1464 |
break;
|
1465 |
default:
|
1466 |
goto bad_reg;
|
1467 |
} |
1468 |
break;
|
1469 |
case 14: /* Reserved. */ |
1470 |
goto bad_reg;
|
1471 |
case 15: /* Implementation specific. */ |
1472 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1473 |
if (op2 == 0 && crm == 1) { |
1474 |
if (env->cp15.c15_cpar != (val & 0x3fff)) { |
1475 |
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
|
1476 |
tb_flush(env); |
1477 |
env->cp15.c15_cpar = val & 0x3fff;
|
1478 |
} |
1479 |
break;
|
1480 |
} |
1481 |
goto bad_reg;
|
1482 |
} |
1483 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
1484 |
switch (crm) {
|
1485 |
case 0: |
1486 |
break;
|
1487 |
case 1: /* Set TI925T configuration. */ |
1488 |
env->cp15.c15_ticonfig = val & 0xe7;
|
1489 |
env->cp15.c0_cpuid = (val & (1 << 5)) ? /* OS_TYPE bit */ |
1490 |
ARM_CPUID_TI915T : ARM_CPUID_TI925T; |
1491 |
break;
|
1492 |
case 2: /* Set I_max. */ |
1493 |
env->cp15.c15_i_max = val; |
1494 |
break;
|
1495 |
case 3: /* Set I_min. */ |
1496 |
env->cp15.c15_i_min = val; |
1497 |
break;
|
1498 |
case 4: /* Set thread-ID. */ |
1499 |
env->cp15.c15_threadid = val & 0xffff;
|
1500 |
break;
|
1501 |
case 8: /* Wait-for-interrupt (deprecated). */ |
1502 |
cpu_interrupt(env, CPU_INTERRUPT_HALT); |
1503 |
break;
|
1504 |
default:
|
1505 |
goto bad_reg;
|
1506 |
} |
1507 |
} |
1508 |
break;
|
1509 |
} |
1510 |
return;
|
1511 |
bad_reg:
|
1512 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
1513 |
cpu_abort(env, "Unimplemented cp15 register write (c%d, c%d, {%d, %d})\n",
|
1514 |
(insn >> 16) & 0xf, crm, op1, op2); |
1515 |
} |
1516 |
|
1517 |
uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) |
1518 |
{ |
1519 |
int op1;
|
1520 |
int op2;
|
1521 |
int crm;
|
1522 |
|
1523 |
op1 = (insn >> 21) & 7; |
1524 |
op2 = (insn >> 5) & 7; |
1525 |
crm = insn & 0xf;
|
1526 |
switch ((insn >> 16) & 0xf) { |
1527 |
case 0: /* ID codes. */ |
1528 |
switch (op1) {
|
1529 |
case 0: |
1530 |
switch (crm) {
|
1531 |
case 0: |
1532 |
switch (op2) {
|
1533 |
case 0: /* Device ID. */ |
1534 |
return env->cp15.c0_cpuid;
|
1535 |
case 1: /* Cache Type. */ |
1536 |
return env->cp15.c0_cachetype;
|
1537 |
case 2: /* TCM status. */ |
1538 |
return 0; |
1539 |
case 3: /* TLB type register. */ |
1540 |
return 0; /* No lockable TLB entries. */ |
1541 |
case 5: /* CPU ID */ |
1542 |
return env->cpu_index;
|
1543 |
default:
|
1544 |
goto bad_reg;
|
1545 |
} |
1546 |
case 1: |
1547 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
1548 |
goto bad_reg;
|
1549 |
return env->cp15.c0_c1[op2];
|
1550 |
case 2: |
1551 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
1552 |
goto bad_reg;
|
1553 |
return env->cp15.c0_c2[op2];
|
1554 |
case 3: case 4: case 5: case 6: case 7: |
1555 |
return 0; |
1556 |
default:
|
1557 |
goto bad_reg;
|
1558 |
} |
1559 |
case 1: |
1560 |
/* These registers aren't documented on arm11 cores. However
|
1561 |
Linux looks at them anyway. */
|
1562 |
if (!arm_feature(env, ARM_FEATURE_V6))
|
1563 |
goto bad_reg;
|
1564 |
if (crm != 0) |
1565 |
goto bad_reg;
|
1566 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1567 |
goto bad_reg;
|
1568 |
return 0; |
1569 |
default:
|
1570 |
goto bad_reg;
|
1571 |
} |
1572 |
case 1: /* System configuration. */ |
1573 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1574 |
op2 = 0;
|
1575 |
switch (op2) {
|
1576 |
case 0: /* Control register. */ |
1577 |
return env->cp15.c1_sys;
|
1578 |
case 1: /* Auxiliary control register. */ |
1579 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1580 |
return env->cp15.c1_xscaleauxcr;
|
1581 |
if (!arm_feature(env, ARM_FEATURE_AUXCR))
|
1582 |
goto bad_reg;
|
1583 |
switch (ARM_CPUID(env)) {
|
1584 |
case ARM_CPUID_ARM1026:
|
1585 |
return 1; |
1586 |
case ARM_CPUID_ARM1136:
|
1587 |
case ARM_CPUID_ARM1136_R2:
|
1588 |
return 7; |
1589 |
case ARM_CPUID_ARM11MPCORE:
|
1590 |
return 1; |
1591 |
case ARM_CPUID_CORTEXA8:
|
1592 |
return 0; |
1593 |
default:
|
1594 |
goto bad_reg;
|
1595 |
} |
1596 |
case 2: /* Coprocessor access register. */ |
1597 |
if (arm_feature(env, ARM_FEATURE_XSCALE))
|
1598 |
goto bad_reg;
|
1599 |
return env->cp15.c1_coproc;
|
1600 |
default:
|
1601 |
goto bad_reg;
|
1602 |
} |
1603 |
case 2: /* MMU Page table control / MPU cache control. */ |
1604 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1605 |
switch (op2) {
|
1606 |
case 0: |
1607 |
return env->cp15.c2_data;
|
1608 |
break;
|
1609 |
case 1: |
1610 |
return env->cp15.c2_insn;
|
1611 |
break;
|
1612 |
default:
|
1613 |
goto bad_reg;
|
1614 |
} |
1615 |
} else {
|
1616 |
switch (op2) {
|
1617 |
case 0: |
1618 |
return env->cp15.c2_base0;
|
1619 |
case 1: |
1620 |
return env->cp15.c2_base1;
|
1621 |
case 2: |
1622 |
{ |
1623 |
int n;
|
1624 |
uint32_t mask; |
1625 |
n = 0;
|
1626 |
mask = env->cp15.c2_mask; |
1627 |
while (mask) {
|
1628 |
n++; |
1629 |
mask <<= 1;
|
1630 |
} |
1631 |
return n;
|
1632 |
} |
1633 |
default:
|
1634 |
goto bad_reg;
|
1635 |
} |
1636 |
} |
1637 |
case 3: /* MMU Domain access control / MPU write buffer control. */ |
1638 |
return env->cp15.c3;
|
1639 |
case 4: /* Reserved. */ |
1640 |
goto bad_reg;
|
1641 |
case 5: /* MMU Fault status / MPU access permission. */ |
1642 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1643 |
op2 = 0;
|
1644 |
switch (op2) {
|
1645 |
case 0: |
1646 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1647 |
return simple_mpu_ap_bits(env->cp15.c5_data);
|
1648 |
return env->cp15.c5_data;
|
1649 |
case 1: |
1650 |
if (arm_feature(env, ARM_FEATURE_MPU))
|
1651 |
return simple_mpu_ap_bits(env->cp15.c5_data);
|
1652 |
return env->cp15.c5_insn;
|
1653 |
case 2: |
1654 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1655 |
goto bad_reg;
|
1656 |
return env->cp15.c5_data;
|
1657 |
case 3: |
1658 |
if (!arm_feature(env, ARM_FEATURE_MPU))
|
1659 |
goto bad_reg;
|
1660 |
return env->cp15.c5_insn;
|
1661 |
default:
|
1662 |
goto bad_reg;
|
1663 |
} |
1664 |
case 6: /* MMU Fault address. */ |
1665 |
if (arm_feature(env, ARM_FEATURE_MPU)) {
|
1666 |
if (crm >= 8) |
1667 |
goto bad_reg;
|
1668 |
return env->cp15.c6_region[crm];
|
1669 |
} else {
|
1670 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1671 |
op2 = 0;
|
1672 |
switch (op2) {
|
1673 |
case 0: |
1674 |
return env->cp15.c6_data;
|
1675 |
case 1: |
1676 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
1677 |
/* Watchpoint Fault Adrress. */
|
1678 |
return 0; /* Not implemented. */ |
1679 |
} else {
|
1680 |
/* Instruction Fault Adrress. */
|
1681 |
/* Arm9 doesn't have an IFAR, but implementing it anyway
|
1682 |
shouldn't do any harm. */
|
1683 |
return env->cp15.c6_insn;
|
1684 |
} |
1685 |
case 2: |
1686 |
if (arm_feature(env, ARM_FEATURE_V6)) {
|
1687 |
/* Instruction Fault Adrress. */
|
1688 |
return env->cp15.c6_insn;
|
1689 |
} else {
|
1690 |
goto bad_reg;
|
1691 |
} |
1692 |
default:
|
1693 |
goto bad_reg;
|
1694 |
} |
1695 |
} |
1696 |
case 7: /* Cache control. */ |
1697 |
/* FIXME: Should only clear Z flag if destination is r15. */
|
1698 |
env->ZF = 0;
|
1699 |
return 0; |
1700 |
case 8: /* MMU TLB control. */ |
1701 |
goto bad_reg;
|
1702 |
case 9: /* Cache lockdown. */ |
1703 |
switch (op1) {
|
1704 |
case 0: /* L1 cache. */ |
1705 |
if (arm_feature(env, ARM_FEATURE_OMAPCP))
|
1706 |
return 0; |
1707 |
switch (op2) {
|
1708 |
case 0: |
1709 |
return env->cp15.c9_data;
|
1710 |
case 1: |
1711 |
return env->cp15.c9_insn;
|
1712 |
default:
|
1713 |
goto bad_reg;
|
1714 |
} |
1715 |
case 1: /* L2 cache */ |
1716 |
if (crm != 0) |
1717 |
goto bad_reg;
|
1718 |
/* L2 Lockdown and Auxiliary control. */
|
1719 |
return 0; |
1720 |
default:
|
1721 |
goto bad_reg;
|
1722 |
} |
1723 |
case 10: /* MMU TLB lockdown. */ |
1724 |
/* ??? TLB lockdown not implemented. */
|
1725 |
return 0; |
1726 |
case 11: /* TCM DMA control. */ |
1727 |
case 12: /* Reserved. */ |
1728 |
goto bad_reg;
|
1729 |
case 13: /* Process ID. */ |
1730 |
switch (op2) {
|
1731 |
case 0: |
1732 |
return env->cp15.c13_fcse;
|
1733 |
case 1: |
1734 |
return env->cp15.c13_context;
|
1735 |
case 2: |
1736 |
return env->cp15.c13_tls1;
|
1737 |
case 3: |
1738 |
return env->cp15.c13_tls2;
|
1739 |
case 4: |
1740 |
return env->cp15.c13_tls3;
|
1741 |
default:
|
1742 |
goto bad_reg;
|
1743 |
} |
1744 |
case 14: /* Reserved. */ |
1745 |
goto bad_reg;
|
1746 |
case 15: /* Implementation specific. */ |
1747 |
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
|
1748 |
if (op2 == 0 && crm == 1) |
1749 |
return env->cp15.c15_cpar;
|
1750 |
|
1751 |
goto bad_reg;
|
1752 |
} |
1753 |
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
|
1754 |
switch (crm) {
|
1755 |
case 0: |
1756 |
return 0; |
1757 |
case 1: /* Read TI925T configuration. */ |
1758 |
return env->cp15.c15_ticonfig;
|
1759 |
case 2: /* Read I_max. */ |
1760 |
return env->cp15.c15_i_max;
|
1761 |
case 3: /* Read I_min. */ |
1762 |
return env->cp15.c15_i_min;
|
1763 |
case 4: /* Read thread-ID. */ |
1764 |
return env->cp15.c15_threadid;
|
1765 |
case 8: /* TI925T_status */ |
1766 |
return 0; |
1767 |
} |
1768 |
/* TODO: Peripheral port remap register:
|
1769 |
* On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt
|
1770 |
* controller base address at $rn & ~0xfff and map size of
|
1771 |
* 0x200 << ($rn & 0xfff), when MMU is off. */
|
1772 |
goto bad_reg;
|
1773 |
} |
1774 |
return 0; |
1775 |
} |
1776 |
bad_reg:
|
1777 |
/* ??? For debugging only. Should raise illegal instruction exception. */
|
1778 |
cpu_abort(env, "Unimplemented cp15 register read (c%d, c%d, {%d, %d})\n",
|
1779 |
(insn >> 16) & 0xf, crm, op1, op2); |
1780 |
return 0; |
1781 |
} |
1782 |
|
1783 |
void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val)
|
1784 |
{ |
1785 |
env->banked_r13[bank_number(mode)] = val; |
1786 |
} |
1787 |
|
1788 |
uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode) |
1789 |
{ |
1790 |
return env->banked_r13[bank_number(mode)];
|
1791 |
} |
1792 |
|
1793 |
uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg) |
1794 |
{ |
1795 |
switch (reg) {
|
1796 |
case 0: /* APSR */ |
1797 |
return xpsr_read(env) & 0xf8000000; |
1798 |
case 1: /* IAPSR */ |
1799 |
return xpsr_read(env) & 0xf80001ff; |
1800 |
case 2: /* EAPSR */ |
1801 |
return xpsr_read(env) & 0xff00fc00; |
1802 |
case 3: /* xPSR */ |
1803 |
return xpsr_read(env) & 0xff00fdff; |
1804 |
case 5: /* IPSR */ |
1805 |
return xpsr_read(env) & 0x000001ff; |
1806 |
case 6: /* EPSR */ |
1807 |
return xpsr_read(env) & 0x0700fc00; |
1808 |
case 7: /* IEPSR */ |
1809 |
return xpsr_read(env) & 0x0700edff; |
1810 |
case 8: /* MSP */ |
1811 |
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13]; |
1812 |
case 9: /* PSP */ |
1813 |
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp; |
1814 |
case 16: /* PRIMASK */ |
1815 |
return (env->uncached_cpsr & CPSR_I) != 0; |
1816 |
case 17: /* FAULTMASK */ |
1817 |
return (env->uncached_cpsr & CPSR_F) != 0; |
1818 |
case 18: /* BASEPRI */ |
1819 |
case 19: /* BASEPRI_MAX */ |
1820 |
return env->v7m.basepri;
|
1821 |
case 20: /* CONTROL */ |
1822 |
return env->v7m.control;
|
1823 |
default:
|
1824 |
/* ??? For debugging only. */
|
1825 |
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
|
1826 |
return 0; |
1827 |
} |
1828 |
} |
1829 |
|
1830 |
void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val)
|
1831 |
{ |
1832 |
switch (reg) {
|
1833 |
case 0: /* APSR */ |
1834 |
xpsr_write(env, val, 0xf8000000);
|
1835 |
break;
|
1836 |
case 1: /* IAPSR */ |
1837 |
xpsr_write(env, val, 0xf8000000);
|
1838 |
break;
|
1839 |
case 2: /* EAPSR */ |
1840 |
xpsr_write(env, val, 0xfe00fc00);
|
1841 |
break;
|
1842 |
case 3: /* xPSR */ |
1843 |
xpsr_write(env, val, 0xfe00fc00);
|
1844 |
break;
|
1845 |
case 5: /* IPSR */ |
1846 |
/* IPSR bits are readonly. */
|
1847 |
break;
|
1848 |
case 6: /* EPSR */ |
1849 |
xpsr_write(env, val, 0x0600fc00);
|
1850 |
break;
|
1851 |
case 7: /* IEPSR */ |
1852 |
xpsr_write(env, val, 0x0600fc00);
|
1853 |
break;
|
1854 |
case 8: /* MSP */ |
1855 |
if (env->v7m.current_sp)
|
1856 |
env->v7m.other_sp = val; |
1857 |
else
|
1858 |
env->regs[13] = val;
|
1859 |
break;
|
1860 |
case 9: /* PSP */ |
1861 |
if (env->v7m.current_sp)
|
1862 |
env->regs[13] = val;
|
1863 |
else
|
1864 |
env->v7m.other_sp = val; |
1865 |
break;
|
1866 |
case 16: /* PRIMASK */ |
1867 |
if (val & 1) |
1868 |
env->uncached_cpsr |= CPSR_I; |
1869 |
else
|
1870 |
env->uncached_cpsr &= ~CPSR_I; |
1871 |
break;
|
1872 |
case 17: /* FAULTMASK */ |
1873 |
if (val & 1) |
1874 |
env->uncached_cpsr |= CPSR_F; |
1875 |
else
|
1876 |
env->uncached_cpsr &= ~CPSR_F; |
1877 |
break;
|
1878 |
case 18: /* BASEPRI */ |
1879 |
env->v7m.basepri = val & 0xff;
|
1880 |
break;
|
1881 |
case 19: /* BASEPRI_MAX */ |
1882 |
val &= 0xff;
|
1883 |
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0)) |
1884 |
env->v7m.basepri = val; |
1885 |
break;
|
1886 |
case 20: /* CONTROL */ |
1887 |
env->v7m.control = val & 3;
|
1888 |
switch_v7m_sp(env, (val & 2) != 0); |
1889 |
break;
|
1890 |
default:
|
1891 |
/* ??? For debugging only. */
|
1892 |
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
|
1893 |
return;
|
1894 |
} |
1895 |
} |
1896 |
|
1897 |
void cpu_arm_set_cp_io(CPUARMState *env, int cpnum, |
1898 |
ARMReadCPFunc *cp_read, ARMWriteCPFunc *cp_write, |
1899 |
void *opaque)
|
1900 |
{ |
1901 |
if (cpnum < 0 || cpnum > 14) { |
1902 |
cpu_abort(env, "Bad coprocessor number: %i\n", cpnum);
|
1903 |
return;
|
1904 |
} |
1905 |
|
1906 |
env->cp[cpnum].cp_read = cp_read; |
1907 |
env->cp[cpnum].cp_write = cp_write; |
1908 |
env->cp[cpnum].opaque = opaque; |
1909 |
} |
1910 |
|
1911 |
#endif
|
1912 |
|
1913 |
/* Note that signed overflow is undefined in C. The following routines are
|
1914 |
careful to use unsigned types where modulo arithmetic is required.
|
1915 |
Failure to do so _will_ break on newer gcc. */
|
1916 |
|
1917 |
/* Signed saturating arithmetic. */
|
1918 |
|
1919 |
/* Perform 16-bit signed saturating addition. */
|
1920 |
static inline uint16_t add16_sat(uint16_t a, uint16_t b) |
1921 |
{ |
1922 |
uint16_t res; |
1923 |
|
1924 |
res = a + b; |
1925 |
if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) { |
1926 |
if (a & 0x8000) |
1927 |
res = 0x8000;
|
1928 |
else
|
1929 |
res = 0x7fff;
|
1930 |
} |
1931 |
return res;
|
1932 |
} |
1933 |
|
1934 |
/* Perform 8-bit signed saturating addition. */
|
1935 |
static inline uint8_t add8_sat(uint8_t a, uint8_t b) |
1936 |
{ |
1937 |
uint8_t res; |
1938 |
|
1939 |
res = a + b; |
1940 |
if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) { |
1941 |
if (a & 0x80) |
1942 |
res = 0x80;
|
1943 |
else
|
1944 |
res = 0x7f;
|
1945 |
} |
1946 |
return res;
|
1947 |
} |
1948 |
|
1949 |
/* Perform 16-bit signed saturating subtraction. */
|
1950 |
static inline uint16_t sub16_sat(uint16_t a, uint16_t b) |
1951 |
{ |
1952 |
uint16_t res; |
1953 |
|
1954 |
res = a - b; |
1955 |
if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) { |
1956 |
if (a & 0x8000) |
1957 |
res = 0x8000;
|
1958 |
else
|
1959 |
res = 0x7fff;
|
1960 |
} |
1961 |
return res;
|
1962 |
} |
1963 |
|
1964 |
/* Perform 8-bit signed saturating subtraction. */
|
1965 |
static inline uint8_t sub8_sat(uint8_t a, uint8_t b) |
1966 |
{ |
1967 |
uint8_t res; |
1968 |
|
1969 |
res = a - b; |
1970 |
if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) { |
1971 |
if (a & 0x80) |
1972 |
res = 0x80;
|
1973 |
else
|
1974 |
res = 0x7f;
|
1975 |
} |
1976 |
return res;
|
1977 |
} |
1978 |
|
1979 |
#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16); |
1980 |
#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16); |
1981 |
#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8); |
1982 |
#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8); |
1983 |
#define PFX q
|
1984 |
|
1985 |
#include "op_addsub.h" |
1986 |
|
1987 |
/* Unsigned saturating arithmetic. */
|
1988 |
static inline uint16_t add16_usat(uint16_t a, uint16_t b) |
1989 |
{ |
1990 |
uint16_t res; |
1991 |
res = a + b; |
1992 |
if (res < a)
|
1993 |
res = 0xffff;
|
1994 |
return res;
|
1995 |
} |
1996 |
|
1997 |
static inline uint16_t sub16_usat(uint16_t a, uint16_t b) |
1998 |
{ |
1999 |
if (a < b)
|
2000 |
return a - b;
|
2001 |
else
|
2002 |
return 0; |
2003 |
} |
2004 |
|
2005 |
static inline uint8_t add8_usat(uint8_t a, uint8_t b) |
2006 |
{ |
2007 |
uint8_t res; |
2008 |
res = a + b; |
2009 |
if (res < a)
|
2010 |
res = 0xff;
|
2011 |
return res;
|
2012 |
} |
2013 |
|
2014 |
static inline uint8_t sub8_usat(uint8_t a, uint8_t b) |
2015 |
{ |
2016 |
if (a < b)
|
2017 |
return a - b;
|
2018 |
else
|
2019 |
return 0; |
2020 |
} |
2021 |
|
2022 |
#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16); |
2023 |
#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16); |
2024 |
#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8); |
2025 |
#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8); |
2026 |
#define PFX uq
|
2027 |
|
2028 |
#include "op_addsub.h" |
2029 |
|
2030 |
/* Signed modulo arithmetic. */
|
2031 |
#define SARITH16(a, b, n, op) do { \ |
2032 |
int32_t sum; \ |
2033 |
sum = (int16_t)((uint16_t)(a) op (uint16_t)(b)); \ |
2034 |
RESULT(sum, n, 16); \
|
2035 |
if (sum >= 0) \ |
2036 |
ge |= 3 << (n * 2); \ |
2037 |
} while(0) |
2038 |
|
2039 |
#define SARITH8(a, b, n, op) do { \ |
2040 |
int32_t sum; \ |
2041 |
sum = (int8_t)((uint8_t)(a) op (uint8_t)(b)); \ |
2042 |
RESULT(sum, n, 8); \
|
2043 |
if (sum >= 0) \ |
2044 |
ge |= 1 << n; \
|
2045 |
} while(0) |
2046 |
|
2047 |
|
2048 |
#define ADD16(a, b, n) SARITH16(a, b, n, +)
|
2049 |
#define SUB16(a, b, n) SARITH16(a, b, n, -)
|
2050 |
#define ADD8(a, b, n) SARITH8(a, b, n, +)
|
2051 |
#define SUB8(a, b, n) SARITH8(a, b, n, -)
|
2052 |
#define PFX s
|
2053 |
#define ARITH_GE
|
2054 |
|
2055 |
#include "op_addsub.h" |
2056 |
|
2057 |
/* Unsigned modulo arithmetic. */
|
2058 |
#define ADD16(a, b, n) do { \ |
2059 |
uint32_t sum; \ |
2060 |
sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \ |
2061 |
RESULT(sum, n, 16); \
|
2062 |
if ((sum >> 16) == 0) \ |
2063 |
ge |= 3 << (n * 2); \ |
2064 |
} while(0) |
2065 |
|
2066 |
#define ADD8(a, b, n) do { \ |
2067 |
uint32_t sum; \ |
2068 |
sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \ |
2069 |
RESULT(sum, n, 8); \
|
2070 |
if ((sum >> 8) == 0) \ |
2071 |
ge |= 3 << (n * 2); \ |
2072 |
} while(0) |
2073 |
|
2074 |
#define SUB16(a, b, n) do { \ |
2075 |
uint32_t sum; \ |
2076 |
sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \ |
2077 |
RESULT(sum, n, 16); \
|
2078 |
if ((sum >> 16) == 0) \ |
2079 |
ge |= 3 << (n * 2); \ |
2080 |
} while(0) |
2081 |
|
2082 |
#define SUB8(a, b, n) do { \ |
2083 |
uint32_t sum; \ |
2084 |
sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \ |
2085 |
RESULT(sum, n, 8); \
|
2086 |
if ((sum >> 8) == 0) \ |
2087 |
ge |= 3 << (n * 2); \ |
2088 |
} while(0) |
2089 |
|
2090 |
#define PFX u
|
2091 |
#define ARITH_GE
|
2092 |
|
2093 |
#include "op_addsub.h" |
2094 |
|
2095 |
/* Halved signed arithmetic. */
|
2096 |
#define ADD16(a, b, n) \
|
2097 |
RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16) |
2098 |
#define SUB16(a, b, n) \
|
2099 |
RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16) |
2100 |
#define ADD8(a, b, n) \
|
2101 |
RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8) |
2102 |
#define SUB8(a, b, n) \
|
2103 |
RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8) |
2104 |
#define PFX sh
|
2105 |
|
2106 |
#include "op_addsub.h" |
2107 |
|
2108 |
/* Halved unsigned arithmetic. */
|
2109 |
#define ADD16(a, b, n) \
|
2110 |
RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
2111 |
#define SUB16(a, b, n) \
|
2112 |
RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16) |
2113 |
#define ADD8(a, b, n) \
|
2114 |
RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
2115 |
#define SUB8(a, b, n) \
|
2116 |
RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8) |
2117 |
#define PFX uh
|
2118 |
|
2119 |
#include "op_addsub.h" |
2120 |
|
2121 |
static inline uint8_t do_usad(uint8_t a, uint8_t b) |
2122 |
{ |
2123 |
if (a > b)
|
2124 |
return a - b;
|
2125 |
else
|
2126 |
return b - a;
|
2127 |
} |
2128 |
|
2129 |
/* Unsigned sum of absolute byte differences. */
|
2130 |
uint32_t HELPER(usad8)(uint32_t a, uint32_t b) |
2131 |
{ |
2132 |
uint32_t sum; |
2133 |
sum = do_usad(a, b); |
2134 |
sum += do_usad(a >> 8, b >> 8); |
2135 |
sum += do_usad(a >> 16, b >>16); |
2136 |
sum += do_usad(a >> 24, b >> 24); |
2137 |
return sum;
|
2138 |
} |
2139 |
|
2140 |
/* For ARMv6 SEL instruction. */
|
2141 |
uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b) |
2142 |
{ |
2143 |
uint32_t mask; |
2144 |
|
2145 |
mask = 0;
|
2146 |
if (flags & 1) |
2147 |
mask |= 0xff;
|
2148 |
if (flags & 2) |
2149 |
mask |= 0xff00;
|
2150 |
if (flags & 4) |
2151 |
mask |= 0xff0000;
|
2152 |
if (flags & 8) |
2153 |
mask |= 0xff000000;
|
2154 |
return (a & mask) | (b & ~mask);
|
2155 |
} |
2156 |
|
2157 |
uint32_t HELPER(logicq_cc)(uint64_t val) |
2158 |
{ |
2159 |
return (val >> 32) | (val != 0); |
2160 |
} |
2161 |
|
2162 |
/* VFP support. We follow the convention used for VFP instrunctions:
|
2163 |
Single precition routines have a "s" suffix, double precision a
|
2164 |
"d" suffix. */
|
2165 |
|
2166 |
/* Convert host exception flags to vfp form. */
|
2167 |
static inline int vfp_exceptbits_from_host(int host_bits) |
2168 |
{ |
2169 |
int target_bits = 0; |
2170 |
|
2171 |
if (host_bits & float_flag_invalid)
|
2172 |
target_bits |= 1;
|
2173 |
if (host_bits & float_flag_divbyzero)
|
2174 |
target_bits |= 2;
|
2175 |
if (host_bits & float_flag_overflow)
|
2176 |
target_bits |= 4;
|
2177 |
if (host_bits & float_flag_underflow)
|
2178 |
target_bits |= 8;
|
2179 |
if (host_bits & float_flag_inexact)
|
2180 |
target_bits |= 0x10;
|
2181 |
return target_bits;
|
2182 |
} |
2183 |
|
2184 |
uint32_t HELPER(vfp_get_fpscr)(CPUState *env) |
2185 |
{ |
2186 |
int i;
|
2187 |
uint32_t fpscr; |
2188 |
|
2189 |
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
|
2190 |
| (env->vfp.vec_len << 16)
|
2191 |
| (env->vfp.vec_stride << 20);
|
2192 |
i = get_float_exception_flags(&env->vfp.fp_status); |
2193 |
fpscr |= vfp_exceptbits_from_host(i); |
2194 |
return fpscr;
|
2195 |
} |
2196 |
|
2197 |
/* Convert vfp exception flags to target form. */
|
2198 |
static inline int vfp_exceptbits_to_host(int target_bits) |
2199 |
{ |
2200 |
int host_bits = 0; |
2201 |
|
2202 |
if (target_bits & 1) |
2203 |
host_bits |= float_flag_invalid; |
2204 |
if (target_bits & 2) |
2205 |
host_bits |= float_flag_divbyzero; |
2206 |
if (target_bits & 4) |
2207 |
host_bits |= float_flag_overflow; |
2208 |
if (target_bits & 8) |
2209 |
host_bits |= float_flag_underflow; |
2210 |
if (target_bits & 0x10) |
2211 |
host_bits |= float_flag_inexact; |
2212 |
return host_bits;
|
2213 |
} |
2214 |
|
2215 |
void HELPER(vfp_set_fpscr)(CPUState *env, uint32_t val)
|
2216 |
{ |
2217 |
int i;
|
2218 |
uint32_t changed; |
2219 |
|
2220 |
changed = env->vfp.xregs[ARM_VFP_FPSCR]; |
2221 |
env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
|
2222 |
env->vfp.vec_len = (val >> 16) & 7; |
2223 |
env->vfp.vec_stride = (val >> 20) & 3; |
2224 |
|
2225 |
changed ^= val; |
2226 |
if (changed & (3 << 22)) { |
2227 |
i = (val >> 22) & 3; |
2228 |
switch (i) {
|
2229 |
case 0: |
2230 |
i = float_round_nearest_even; |
2231 |
break;
|
2232 |
case 1: |
2233 |
i = float_round_up; |
2234 |
break;
|
2235 |
case 2: |
2236 |
i = float_round_down; |
2237 |
break;
|
2238 |
case 3: |
2239 |
i = float_round_to_zero; |
2240 |
break;
|
2241 |
} |
2242 |
set_float_rounding_mode(i, &env->vfp.fp_status); |
2243 |
} |
2244 |
|
2245 |
i = vfp_exceptbits_to_host((val >> 8) & 0x1f); |
2246 |
set_float_exception_flags(i, &env->vfp.fp_status); |
2247 |
/* XXX: FZ and DN are not implemented. */
|
2248 |
} |
2249 |
|
2250 |
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
|
2251 |
|
2252 |
#define VFP_BINOP(name) \
|
2253 |
float32 VFP_HELPER(name, s)(float32 a, float32 b, CPUState *env) \ |
2254 |
{ \ |
2255 |
return float32_ ## name (a, b, &env->vfp.fp_status); \ |
2256 |
} \ |
2257 |
float64 VFP_HELPER(name, d)(float64 a, float64 b, CPUState *env) \ |
2258 |
{ \ |
2259 |
return float64_ ## name (a, b, &env->vfp.fp_status); \ |
2260 |
} |
2261 |
VFP_BINOP(add) |
2262 |
VFP_BINOP(sub) |
2263 |
VFP_BINOP(mul) |
2264 |
VFP_BINOP(div) |
2265 |
#undef VFP_BINOP
|
2266 |
|
2267 |
float32 VFP_HELPER(neg, s)(float32 a) |
2268 |
{ |
2269 |
return float32_chs(a);
|
2270 |
} |
2271 |
|
2272 |
float64 VFP_HELPER(neg, d)(float64 a) |
2273 |
{ |
2274 |
return float64_chs(a);
|
2275 |
} |
2276 |
|
2277 |
float32 VFP_HELPER(abs, s)(float32 a) |
2278 |
{ |
2279 |
return float32_abs(a);
|
2280 |
} |
2281 |
|
2282 |
float64 VFP_HELPER(abs, d)(float64 a) |
2283 |
{ |
2284 |
return float64_abs(a);
|
2285 |
} |
2286 |
|
2287 |
float32 VFP_HELPER(sqrt, s)(float32 a, CPUState *env) |
2288 |
{ |
2289 |
return float32_sqrt(a, &env->vfp.fp_status);
|
2290 |
} |
2291 |
|
2292 |
float64 VFP_HELPER(sqrt, d)(float64 a, CPUState *env) |
2293 |
{ |
2294 |
return float64_sqrt(a, &env->vfp.fp_status);
|
2295 |
} |
2296 |
|
2297 |
/* XXX: check quiet/signaling case */
|
2298 |
#define DO_VFP_cmp(p, type) \
|
2299 |
void VFP_HELPER(cmp, p)(type a, type b, CPUState *env) \
|
2300 |
{ \ |
2301 |
uint32_t flags; \ |
2302 |
switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \ |
2303 |
case 0: flags = 0x6; break; \ |
2304 |
case -1: flags = 0x8; break; \ |
2305 |
case 1: flags = 0x2; break; \ |
2306 |
default: case 2: flags = 0x3; break; \ |
2307 |
} \ |
2308 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
2309 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
2310 |
} \ |
2311 |
void VFP_HELPER(cmpe, p)(type a, type b, CPUState *env) \
|
2312 |
{ \ |
2313 |
uint32_t flags; \ |
2314 |
switch(type ## _compare(a, b, &env->vfp.fp_status)) { \ |
2315 |
case 0: flags = 0x6; break; \ |
2316 |
case -1: flags = 0x8; break; \ |
2317 |
case 1: flags = 0x2; break; \ |
2318 |
default: case 2: flags = 0x3; break; \ |
2319 |
} \ |
2320 |
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
|
2321 |
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
|
2322 |
} |
2323 |
DO_VFP_cmp(s, float32) |
2324 |
DO_VFP_cmp(d, float64) |
2325 |
#undef DO_VFP_cmp
|
2326 |
|
2327 |
/* Helper routines to perform bitwise copies between float and int. */
|
2328 |
static inline float32 vfp_itos(uint32_t i) |
2329 |
{ |
2330 |
union {
|
2331 |
uint32_t i; |
2332 |
float32 s; |
2333 |
} v; |
2334 |
|
2335 |
v.i = i; |
2336 |
return v.s;
|
2337 |
} |
2338 |
|
2339 |
static inline uint32_t vfp_stoi(float32 s) |
2340 |
{ |
2341 |
union {
|
2342 |
uint32_t i; |
2343 |
float32 s; |
2344 |
} v; |
2345 |
|
2346 |
v.s = s; |
2347 |
return v.i;
|
2348 |
} |
2349 |
|
2350 |
static inline float64 vfp_itod(uint64_t i) |
2351 |
{ |
2352 |
union {
|
2353 |
uint64_t i; |
2354 |
float64 d; |
2355 |
} v; |
2356 |
|
2357 |
v.i = i; |
2358 |
return v.d;
|
2359 |
} |
2360 |
|
2361 |
static inline uint64_t vfp_dtoi(float64 d) |
2362 |
{ |
2363 |
union {
|
2364 |
uint64_t i; |
2365 |
float64 d; |
2366 |
} v; |
2367 |
|
2368 |
v.d = d; |
2369 |
return v.i;
|
2370 |
} |
2371 |
|
2372 |
/* Integer to float conversion. */
|
2373 |
float32 VFP_HELPER(uito, s)(float32 x, CPUState *env) |
2374 |
{ |
2375 |
return uint32_to_float32(vfp_stoi(x), &env->vfp.fp_status);
|
2376 |
} |
2377 |
|
2378 |
float64 VFP_HELPER(uito, d)(float32 x, CPUState *env) |
2379 |
{ |
2380 |
return uint32_to_float64(vfp_stoi(x), &env->vfp.fp_status);
|
2381 |
} |
2382 |
|
2383 |
float32 VFP_HELPER(sito, s)(float32 x, CPUState *env) |
2384 |
{ |
2385 |
return int32_to_float32(vfp_stoi(x), &env->vfp.fp_status);
|
2386 |
} |
2387 |
|
2388 |
float64 VFP_HELPER(sito, d)(float32 x, CPUState *env) |
2389 |
{ |
2390 |
return int32_to_float64(vfp_stoi(x), &env->vfp.fp_status);
|
2391 |
} |
2392 |
|
2393 |
/* Float to integer conversion. */
|
2394 |
float32 VFP_HELPER(toui, s)(float32 x, CPUState *env) |
2395 |
{ |
2396 |
return vfp_itos(float32_to_uint32(x, &env->vfp.fp_status));
|
2397 |
} |
2398 |
|
2399 |
float32 VFP_HELPER(toui, d)(float64 x, CPUState *env) |
2400 |
{ |
2401 |
return vfp_itos(float64_to_uint32(x, &env->vfp.fp_status));
|
2402 |
} |
2403 |
|
2404 |
float32 VFP_HELPER(tosi, s)(float32 x, CPUState *env) |
2405 |
{ |
2406 |
return vfp_itos(float32_to_int32(x, &env->vfp.fp_status));
|
2407 |
} |
2408 |
|
2409 |
float32 VFP_HELPER(tosi, d)(float64 x, CPUState *env) |
2410 |
{ |
2411 |
return vfp_itos(float64_to_int32(x, &env->vfp.fp_status));
|
2412 |
} |
2413 |
|
2414 |
float32 VFP_HELPER(touiz, s)(float32 x, CPUState *env) |
2415 |
{ |
2416 |
return vfp_itos(float32_to_uint32_round_to_zero(x, &env->vfp.fp_status));
|
2417 |
} |
2418 |
|
2419 |
float32 VFP_HELPER(touiz, d)(float64 x, CPUState *env) |
2420 |
{ |
2421 |
return vfp_itos(float64_to_uint32_round_to_zero(x, &env->vfp.fp_status));
|
2422 |
} |
2423 |
|
2424 |
float32 VFP_HELPER(tosiz, s)(float32 x, CPUState *env) |
2425 |
{ |
2426 |
return vfp_itos(float32_to_int32_round_to_zero(x, &env->vfp.fp_status));
|
2427 |
} |
2428 |
|
2429 |
float32 VFP_HELPER(tosiz, d)(float64 x, CPUState *env) |
2430 |
{ |
2431 |
return vfp_itos(float64_to_int32_round_to_zero(x, &env->vfp.fp_status));
|
2432 |
} |
2433 |
|
2434 |
/* floating point conversion */
|
2435 |
float64 VFP_HELPER(fcvtd, s)(float32 x, CPUState *env) |
2436 |
{ |
2437 |
return float32_to_float64(x, &env->vfp.fp_status);
|
2438 |
} |
2439 |
|
2440 |
float32 VFP_HELPER(fcvts, d)(float64 x, CPUState *env) |
2441 |
{ |
2442 |
return float64_to_float32(x, &env->vfp.fp_status);
|
2443 |
} |
2444 |
|
2445 |
/* VFP3 fixed point conversion. */
|
2446 |
#define VFP_CONV_FIX(name, p, ftype, itype, sign) \
|
2447 |
ftype VFP_HELPER(name##to, p)(ftype x, uint32_t shift, CPUState *env) \ |
2448 |
{ \ |
2449 |
ftype tmp; \ |
2450 |
tmp = sign##int32_to_##ftype ((itype)vfp_##p##toi(x), \ |
2451 |
&env->vfp.fp_status); \ |
2452 |
return ftype##_scalbn(tmp, shift, &env->vfp.fp_status); \ |
2453 |
} \ |
2454 |
ftype VFP_HELPER(to##name, p)(ftype x, uint32_t shift, CPUState *env) \ |
2455 |
{ \ |
2456 |
ftype tmp; \ |
2457 |
tmp = ftype##_scalbn(x, shift, &env->vfp.fp_status); \ |
2458 |
return vfp_ito##p((itype)ftype##_to_##sign##int32_round_to_zero(tmp, \ |
2459 |
&env->vfp.fp_status)); \ |
2460 |
} |
2461 |
|
2462 |
VFP_CONV_FIX(sh, d, float64, int16, ) |
2463 |
VFP_CONV_FIX(sl, d, float64, int32, ) |
2464 |
VFP_CONV_FIX(uh, d, float64, uint16, u) |
2465 |
VFP_CONV_FIX(ul, d, float64, uint32, u) |
2466 |
VFP_CONV_FIX(sh, s, float32, int16, ) |
2467 |
VFP_CONV_FIX(sl, s, float32, int32, ) |
2468 |
VFP_CONV_FIX(uh, s, float32, uint16, u) |
2469 |
VFP_CONV_FIX(ul, s, float32, uint32, u) |
2470 |
#undef VFP_CONV_FIX
|
2471 |
|
2472 |
float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env) |
2473 |
{ |
2474 |
float_status *s = &env->vfp.fp_status; |
2475 |
float32 two = int32_to_float32(2, s);
|
2476 |
return float32_sub(two, float32_mul(a, b, s), s);
|
2477 |
} |
2478 |
|
2479 |
float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUState *env) |
2480 |
{ |
2481 |
float_status *s = &env->vfp.fp_status; |
2482 |
float32 three = int32_to_float32(3, s);
|
2483 |
return float32_sub(three, float32_mul(a, b, s), s);
|
2484 |
} |
2485 |
|
2486 |
/* NEON helpers. */
|
2487 |
|
2488 |
/* TODO: The architecture specifies the value that the estimate functions
|
2489 |
should return. We return the exact reciprocal/root instead. */
|
2490 |
float32 HELPER(recpe_f32)(float32 a, CPUState *env) |
2491 |
{ |
2492 |
float_status *s = &env->vfp.fp_status; |
2493 |
float32 one = int32_to_float32(1, s);
|
2494 |
return float32_div(one, a, s);
|
2495 |
} |
2496 |
|
2497 |
float32 HELPER(rsqrte_f32)(float32 a, CPUState *env) |
2498 |
{ |
2499 |
float_status *s = &env->vfp.fp_status; |
2500 |
float32 one = int32_to_float32(1, s);
|
2501 |
return float32_div(one, float32_sqrt(a, s), s);
|
2502 |
} |
2503 |
|
2504 |
uint32_t HELPER(recpe_u32)(uint32_t a, CPUState *env) |
2505 |
{ |
2506 |
float_status *s = &env->vfp.fp_status; |
2507 |
float32 tmp; |
2508 |
tmp = int32_to_float32(a, s); |
2509 |
tmp = float32_scalbn(tmp, -32, s);
|
2510 |
tmp = helper_recpe_f32(tmp, env); |
2511 |
tmp = float32_scalbn(tmp, 31, s);
|
2512 |
return float32_to_int32(tmp, s);
|
2513 |
} |
2514 |
|
2515 |
uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUState *env) |
2516 |
{ |
2517 |
float_status *s = &env->vfp.fp_status; |
2518 |
float32 tmp; |
2519 |
tmp = int32_to_float32(a, s); |
2520 |
tmp = float32_scalbn(tmp, -32, s);
|
2521 |
tmp = helper_rsqrte_f32(tmp, env); |
2522 |
tmp = float32_scalbn(tmp, 31, s);
|
2523 |
return float32_to_int32(tmp, s);
|
2524 |
} |