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b5ff1b31 FB |
1 | #include <stdio.h> |
2 | #include <stdlib.h> | |
3 | #include <string.h> | |
4 | ||
5 | #include "cpu.h" | |
9ee6e8bb | 6 | #include "gdbstub.h" |
7b59220e | 7 | #include "helper.h" |
ca10f867 | 8 | #include "qemu-common.h" |
7bbcb0af | 9 | #include "host-utils.h" |
4f78c9ad | 10 | #if !defined(CONFIG_USER_ONLY) |
983fe826 | 11 | #include "hw/loader.h" |
4f78c9ad | 12 | #endif |
9ee6e8bb | 13 | |
10055562 PB |
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 | ||
9ee6e8bb PB |
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 }; | |
b5ff1b31 | 37 | |
7807eed9 JI |
38 | static uint32_t arm1176_cp15_c0_c1[8] = |
39 | { 0x111, 0x11, 0x33, 0, 0x01130003, 0x10030302, 0x01222100, 0 }; | |
40 | ||
41 | static uint32_t arm1176_cp15_c0_c2[8] = | |
42 | { 0x0140011, 0x12002111, 0x11231121, 0x01102131, 0x01141, 0, 0, 0 }; | |
43 | ||
aaed909a FB |
44 | static uint32_t cpu_arm_find_by_name(const char *name); |
45 | ||
f3d6b95e PB |
46 | static inline void set_feature(CPUARMState *env, int feature) |
47 | { | |
48 | env->features |= 1u << feature; | |
49 | } | |
50 | ||
51 | static void cpu_reset_model_id(CPUARMState *env, uint32_t id) | |
52 | { | |
53 | env->cp15.c0_cpuid = id; | |
54 | switch (id) { | |
55 | case ARM_CPUID_ARM926: | |
be5e7a76 | 56 | set_feature(env, ARM_FEATURE_V5); |
f3d6b95e PB |
57 | set_feature(env, ARM_FEATURE_VFP); |
58 | env->vfp.xregs[ARM_VFP_FPSID] = 0x41011090; | |
c1713132 | 59 | env->cp15.c0_cachetype = 0x1dd20d2; |
610c3c8a | 60 | env->cp15.c1_sys = 0x00090078; |
f3d6b95e | 61 | break; |
ce819861 | 62 | case ARM_CPUID_ARM946: |
be5e7a76 | 63 | set_feature(env, ARM_FEATURE_V5); |
ce819861 PB |
64 | set_feature(env, ARM_FEATURE_MPU); |
65 | env->cp15.c0_cachetype = 0x0f004006; | |
610c3c8a | 66 | env->cp15.c1_sys = 0x00000078; |
ce819861 | 67 | break; |
f3d6b95e | 68 | case ARM_CPUID_ARM1026: |
be5e7a76 | 69 | set_feature(env, ARM_FEATURE_V5); |
f3d6b95e PB |
70 | set_feature(env, ARM_FEATURE_VFP); |
71 | set_feature(env, ARM_FEATURE_AUXCR); | |
72 | env->vfp.xregs[ARM_VFP_FPSID] = 0x410110a0; | |
c1713132 | 73 | env->cp15.c0_cachetype = 0x1dd20d2; |
610c3c8a | 74 | env->cp15.c1_sys = 0x00090078; |
c1713132 | 75 | break; |
9ee6e8bb | 76 | case ARM_CPUID_ARM1136: |
906879a9 PM |
77 | /* This is the 1136 r1, which is a v6K core */ |
78 | set_feature(env, ARM_FEATURE_V6K); | |
79 | /* Fall through */ | |
80 | case ARM_CPUID_ARM1136_R2: | |
81 | /* What qemu calls "arm1136_r2" is actually the 1136 r0p2, ie an | |
82 | * older core than plain "arm1136". In particular this does not | |
83 | * have the v6K features. | |
84 | */ | |
9ee6e8bb PB |
85 | set_feature(env, ARM_FEATURE_V6); |
86 | set_feature(env, ARM_FEATURE_VFP); | |
87 | set_feature(env, ARM_FEATURE_AUXCR); | |
906879a9 PM |
88 | /* These ID register values are correct for 1136 but may be wrong |
89 | * for 1136_r2 (in particular r0p2 does not actually implement most | |
90 | * of the ID registers). | |
91 | */ | |
9ee6e8bb PB |
92 | env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4; |
93 | env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111; | |
94 | env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000; | |
95 | memcpy(env->cp15.c0_c1, arm1136_cp15_c0_c1, 8 * sizeof(uint32_t)); | |
22478e79 | 96 | memcpy(env->cp15.c0_c2, arm1136_cp15_c0_c2, 8 * sizeof(uint32_t)); |
9ee6e8bb | 97 | env->cp15.c0_cachetype = 0x1dd20d2; |
16440c5f | 98 | env->cp15.c1_sys = 0x00050078; |
9ee6e8bb | 99 | break; |
7807eed9 | 100 | case ARM_CPUID_ARM1176: |
7807eed9 JI |
101 | set_feature(env, ARM_FEATURE_V6K); |
102 | set_feature(env, ARM_FEATURE_VFP); | |
103 | set_feature(env, ARM_FEATURE_AUXCR); | |
906879a9 | 104 | set_feature(env, ARM_FEATURE_VAPA); |
7807eed9 JI |
105 | env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b5; |
106 | env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111; | |
107 | env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000; | |
108 | memcpy(env->cp15.c0_c1, arm1176_cp15_c0_c1, 8 * sizeof(uint32_t)); | |
109 | memcpy(env->cp15.c0_c2, arm1176_cp15_c0_c2, 8 * sizeof(uint32_t)); | |
110 | env->cp15.c0_cachetype = 0x1dd20d2; | |
111 | env->cp15.c1_sys = 0x00050078; | |
112 | break; | |
9ee6e8bb | 113 | case ARM_CPUID_ARM11MPCORE: |
9ee6e8bb PB |
114 | set_feature(env, ARM_FEATURE_V6K); |
115 | set_feature(env, ARM_FEATURE_VFP); | |
116 | set_feature(env, ARM_FEATURE_AUXCR); | |
906879a9 | 117 | set_feature(env, ARM_FEATURE_VAPA); |
9ee6e8bb PB |
118 | env->vfp.xregs[ARM_VFP_FPSID] = 0x410120b4; |
119 | env->vfp.xregs[ARM_VFP_MVFR0] = 0x11111111; | |
120 | env->vfp.xregs[ARM_VFP_MVFR1] = 0x00000000; | |
121 | memcpy(env->cp15.c0_c1, mpcore_cp15_c0_c1, 8 * sizeof(uint32_t)); | |
22478e79 | 122 | memcpy(env->cp15.c0_c2, mpcore_cp15_c0_c2, 8 * sizeof(uint32_t)); |
9ee6e8bb PB |
123 | env->cp15.c0_cachetype = 0x1dd20d2; |
124 | break; | |
125 | case ARM_CPUID_CORTEXA8: | |
9ee6e8bb PB |
126 | set_feature(env, ARM_FEATURE_V6K); |
127 | set_feature(env, ARM_FEATURE_V7); | |
128 | set_feature(env, ARM_FEATURE_AUXCR); | |
129 | set_feature(env, ARM_FEATURE_THUMB2); | |
130 | set_feature(env, ARM_FEATURE_VFP); | |
131 | set_feature(env, ARM_FEATURE_VFP3); | |
132 | set_feature(env, ARM_FEATURE_NEON); | |
fe1479c3 | 133 | set_feature(env, ARM_FEATURE_THUMB2EE); |
9ee6e8bb PB |
134 | env->vfp.xregs[ARM_VFP_FPSID] = 0x410330c0; |
135 | env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222; | |
136 | env->vfp.xregs[ARM_VFP_MVFR1] = 0x00011100; | |
137 | memcpy(env->cp15.c0_c1, cortexa8_cp15_c0_c1, 8 * sizeof(uint32_t)); | |
22478e79 | 138 | memcpy(env->cp15.c0_c2, cortexa8_cp15_c0_c2, 8 * sizeof(uint32_t)); |
a49ea279 PB |
139 | env->cp15.c0_cachetype = 0x82048004; |
140 | env->cp15.c0_clid = (1 << 27) | (2 << 24) | 3; | |
141 | env->cp15.c0_ccsid[0] = 0xe007e01a; /* 16k L1 dcache. */ | |
142 | env->cp15.c0_ccsid[1] = 0x2007e01a; /* 16k L1 icache. */ | |
143 | env->cp15.c0_ccsid[2] = 0xf0000000; /* No L2 icache. */ | |
9c486ad6 | 144 | env->cp15.c1_sys = 0x00c50078; |
9ee6e8bb | 145 | break; |
10055562 | 146 | case ARM_CPUID_CORTEXA9: |
10055562 PB |
147 | set_feature(env, ARM_FEATURE_V6K); |
148 | set_feature(env, ARM_FEATURE_V7); | |
149 | set_feature(env, ARM_FEATURE_AUXCR); | |
150 | set_feature(env, ARM_FEATURE_THUMB2); | |
151 | set_feature(env, ARM_FEATURE_VFP); | |
152 | set_feature(env, ARM_FEATURE_VFP3); | |
153 | set_feature(env, ARM_FEATURE_VFP_FP16); | |
154 | set_feature(env, ARM_FEATURE_NEON); | |
155 | set_feature(env, ARM_FEATURE_THUMB2EE); | |
e1bbf446 PM |
156 | /* Note that A9 supports the MP extensions even for |
157 | * A9UP and single-core A9MP (which are both different | |
158 | * and valid configurations; we don't model A9UP). | |
159 | */ | |
160 | set_feature(env, ARM_FEATURE_V7MP); | |
10055562 PB |
161 | env->vfp.xregs[ARM_VFP_FPSID] = 0x41034000; /* Guess */ |
162 | env->vfp.xregs[ARM_VFP_MVFR0] = 0x11110222; | |
163 | env->vfp.xregs[ARM_VFP_MVFR1] = 0x01111111; | |
164 | memcpy(env->cp15.c0_c1, cortexa9_cp15_c0_c1, 8 * sizeof(uint32_t)); | |
165 | memcpy(env->cp15.c0_c2, cortexa9_cp15_c0_c2, 8 * sizeof(uint32_t)); | |
166 | env->cp15.c0_cachetype = 0x80038003; | |
167 | env->cp15.c0_clid = (1 << 27) | (1 << 24) | 3; | |
168 | env->cp15.c0_ccsid[0] = 0xe00fe015; /* 16k L1 dcache. */ | |
169 | env->cp15.c0_ccsid[1] = 0x200fe015; /* 16k L1 icache. */ | |
16440c5f | 170 | env->cp15.c1_sys = 0x00c50078; |
10055562 | 171 | break; |
9ee6e8bb PB |
172 | case ARM_CPUID_CORTEXM3: |
173 | set_feature(env, ARM_FEATURE_V6); | |
174 | set_feature(env, ARM_FEATURE_THUMB2); | |
175 | set_feature(env, ARM_FEATURE_V7); | |
176 | set_feature(env, ARM_FEATURE_M); | |
47789990 | 177 | set_feature(env, ARM_FEATURE_THUMB_DIV); |
9ee6e8bb PB |
178 | break; |
179 | case ARM_CPUID_ANY: /* For userspace emulation. */ | |
9ee6e8bb PB |
180 | set_feature(env, ARM_FEATURE_V6K); |
181 | set_feature(env, ARM_FEATURE_V7); | |
182 | set_feature(env, ARM_FEATURE_THUMB2); | |
183 | set_feature(env, ARM_FEATURE_VFP); | |
184 | set_feature(env, ARM_FEATURE_VFP3); | |
da97f52c | 185 | set_feature(env, ARM_FEATURE_VFP4); |
60011498 | 186 | set_feature(env, ARM_FEATURE_VFP_FP16); |
9ee6e8bb | 187 | set_feature(env, ARM_FEATURE_NEON); |
fe1479c3 | 188 | set_feature(env, ARM_FEATURE_THUMB2EE); |
b8b8ea05 | 189 | set_feature(env, ARM_FEATURE_ARM_DIV); |
e1bbf446 | 190 | set_feature(env, ARM_FEATURE_V7MP); |
9ee6e8bb | 191 | break; |
c3d2689d AZ |
192 | case ARM_CPUID_TI915T: |
193 | case ARM_CPUID_TI925T: | |
be5e7a76 | 194 | set_feature(env, ARM_FEATURE_V4T); |
c3d2689d AZ |
195 | set_feature(env, ARM_FEATURE_OMAPCP); |
196 | env->cp15.c0_cpuid = ARM_CPUID_TI925T; /* Depends on wiring. */ | |
197 | env->cp15.c0_cachetype = 0x5109149; | |
198 | env->cp15.c1_sys = 0x00000070; | |
199 | env->cp15.c15_i_max = 0x000; | |
200 | env->cp15.c15_i_min = 0xff0; | |
201 | break; | |
c1713132 AZ |
202 | case ARM_CPUID_PXA250: |
203 | case ARM_CPUID_PXA255: | |
204 | case ARM_CPUID_PXA260: | |
205 | case ARM_CPUID_PXA261: | |
206 | case ARM_CPUID_PXA262: | |
be5e7a76 | 207 | set_feature(env, ARM_FEATURE_V5); |
c1713132 AZ |
208 | set_feature(env, ARM_FEATURE_XSCALE); |
209 | /* JTAG_ID is ((id << 28) | 0x09265013) */ | |
210 | env->cp15.c0_cachetype = 0xd172172; | |
610c3c8a | 211 | env->cp15.c1_sys = 0x00000078; |
c1713132 AZ |
212 | break; |
213 | case ARM_CPUID_PXA270_A0: | |
214 | case ARM_CPUID_PXA270_A1: | |
215 | case ARM_CPUID_PXA270_B0: | |
216 | case ARM_CPUID_PXA270_B1: | |
217 | case ARM_CPUID_PXA270_C0: | |
218 | case ARM_CPUID_PXA270_C5: | |
be5e7a76 | 219 | set_feature(env, ARM_FEATURE_V5); |
c1713132 AZ |
220 | set_feature(env, ARM_FEATURE_XSCALE); |
221 | /* JTAG_ID is ((id << 28) | 0x09265013) */ | |
18c9b560 AZ |
222 | set_feature(env, ARM_FEATURE_IWMMXT); |
223 | env->iwmmxt.cregs[ARM_IWMMXT_wCID] = 0x69051000 | 'Q'; | |
c1713132 | 224 | env->cp15.c0_cachetype = 0xd172172; |
610c3c8a | 225 | env->cp15.c1_sys = 0x00000078; |
f3d6b95e | 226 | break; |
5bc95aa2 DES |
227 | case ARM_CPUID_SA1100: |
228 | case ARM_CPUID_SA1110: | |
229 | set_feature(env, ARM_FEATURE_STRONGARM); | |
230 | env->cp15.c1_sys = 0x00000070; | |
231 | break; | |
f3d6b95e PB |
232 | default: |
233 | cpu_abort(env, "Bad CPU ID: %x\n", id); | |
234 | break; | |
235 | } | |
906879a9 PM |
236 | |
237 | /* Some features automatically imply others: */ | |
238 | if (arm_feature(env, ARM_FEATURE_V7)) { | |
239 | set_feature(env, ARM_FEATURE_VAPA); | |
240 | } | |
6bf62124 AF |
241 | if (arm_feature(env, ARM_FEATURE_V6K)) { |
242 | set_feature(env, ARM_FEATURE_V6); | |
243 | } | |
08c40f3c AF |
244 | if (arm_feature(env, ARM_FEATURE_V6)) { |
245 | set_feature(env, ARM_FEATURE_V5); | |
246 | } | |
ddb572ec AF |
247 | if (arm_feature(env, ARM_FEATURE_V5)) { |
248 | set_feature(env, ARM_FEATURE_V4T); | |
249 | } | |
b8b8ea05 PM |
250 | if (arm_feature(env, ARM_FEATURE_ARM_DIV)) { |
251 | set_feature(env, ARM_FEATURE_THUMB_DIV); | |
252 | } | |
f3d6b95e PB |
253 | } |
254 | ||
40f137e1 PB |
255 | void cpu_reset(CPUARMState *env) |
256 | { | |
f3d6b95e | 257 | uint32_t id; |
eca1bdf4 AL |
258 | |
259 | if (qemu_loglevel_mask(CPU_LOG_RESET)) { | |
260 | qemu_log("CPU Reset (CPU %d)\n", env->cpu_index); | |
261 | log_cpu_state(env, 0); | |
262 | } | |
263 | ||
f3d6b95e PB |
264 | id = env->cp15.c0_cpuid; |
265 | memset(env, 0, offsetof(CPUARMState, breakpoints)); | |
266 | if (id) | |
267 | cpu_reset_model_id(env, id); | |
40f137e1 PB |
268 | #if defined (CONFIG_USER_ONLY) |
269 | env->uncached_cpsr = ARM_CPU_MODE_USR; | |
3a807dec | 270 | /* For user mode we must enable access to coprocessors */ |
40f137e1 | 271 | env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30; |
3a807dec PM |
272 | if (arm_feature(env, ARM_FEATURE_IWMMXT)) { |
273 | env->cp15.c15_cpar = 3; | |
274 | } else if (arm_feature(env, ARM_FEATURE_XSCALE)) { | |
275 | env->cp15.c15_cpar = 1; | |
276 | } | |
40f137e1 PB |
277 | #else |
278 | /* SVC mode with interrupts disabled. */ | |
279 | env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I; | |
9ee6e8bb | 280 | /* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is |
983fe826 PB |
281 | clear at reset. Initial SP and PC are loaded from ROM. */ |
282 | if (IS_M(env)) { | |
283 | uint32_t pc; | |
284 | uint8_t *rom; | |
9ee6e8bb | 285 | env->uncached_cpsr &= ~CPSR_I; |
983fe826 PB |
286 | rom = rom_ptr(0); |
287 | if (rom) { | |
288 | /* We should really use ldl_phys here, in case the guest | |
289 | modified flash and reset itself. However images | |
297d1b4e | 290 | loaded via -kernel have not been copied yet, so load the |
983fe826 PB |
291 | values directly from there. */ |
292 | env->regs[13] = ldl_p(rom); | |
293 | pc = ldl_p(rom + 4); | |
294 | env->thumb = pc & 1; | |
295 | env->regs[15] = pc & ~1; | |
296 | } | |
297 | } | |
40f137e1 | 298 | env->vfp.xregs[ARM_VFP_FPEXC] = 0; |
b2fa1797 | 299 | env->cp15.c2_base_mask = 0xffffc000u; |
74594c9d PM |
300 | /* v7 performance monitor control register: same implementor |
301 | * field as main ID register, and we implement no event counters. | |
302 | */ | |
303 | env->cp15.c9_pmcr = (id & 0xff000000); | |
40f137e1 | 304 | #endif |
3a492f3a PM |
305 | set_flush_to_zero(1, &env->vfp.standard_fp_status); |
306 | set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status); | |
307 | set_default_nan_mode(1, &env->vfp.standard_fp_status); | |
9df38c47 PM |
308 | set_float_detect_tininess(float_tininess_before_rounding, |
309 | &env->vfp.fp_status); | |
310 | set_float_detect_tininess(float_tininess_before_rounding, | |
311 | &env->vfp.standard_fp_status); | |
f3d6b95e | 312 | tlb_flush(env, 1); |
40f137e1 PB |
313 | } |
314 | ||
56aebc89 PB |
315 | static int vfp_gdb_get_reg(CPUState *env, uint8_t *buf, int reg) |
316 | { | |
317 | int nregs; | |
318 | ||
319 | /* VFP data registers are always little-endian. */ | |
320 | nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16; | |
321 | if (reg < nregs) { | |
322 | stfq_le_p(buf, env->vfp.regs[reg]); | |
323 | return 8; | |
324 | } | |
325 | if (arm_feature(env, ARM_FEATURE_NEON)) { | |
326 | /* Aliases for Q regs. */ | |
327 | nregs += 16; | |
328 | if (reg < nregs) { | |
329 | stfq_le_p(buf, env->vfp.regs[(reg - 32) * 2]); | |
330 | stfq_le_p(buf + 8, env->vfp.regs[(reg - 32) * 2 + 1]); | |
331 | return 16; | |
332 | } | |
333 | } | |
334 | switch (reg - nregs) { | |
335 | case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4; | |
336 | case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4; | |
337 | case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4; | |
338 | } | |
339 | return 0; | |
340 | } | |
341 | ||
342 | static int vfp_gdb_set_reg(CPUState *env, uint8_t *buf, int reg) | |
343 | { | |
344 | int nregs; | |
345 | ||
346 | nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16; | |
347 | if (reg < nregs) { | |
348 | env->vfp.regs[reg] = ldfq_le_p(buf); | |
349 | return 8; | |
350 | } | |
351 | if (arm_feature(env, ARM_FEATURE_NEON)) { | |
352 | nregs += 16; | |
353 | if (reg < nregs) { | |
354 | env->vfp.regs[(reg - 32) * 2] = ldfq_le_p(buf); | |
355 | env->vfp.regs[(reg - 32) * 2 + 1] = ldfq_le_p(buf + 8); | |
356 | return 16; | |
357 | } | |
358 | } | |
359 | switch (reg - nregs) { | |
360 | case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4; | |
361 | case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4; | |
71b3c3de | 362 | case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4; |
56aebc89 PB |
363 | } |
364 | return 0; | |
365 | } | |
366 | ||
aaed909a | 367 | CPUARMState *cpu_arm_init(const char *cpu_model) |
40f137e1 PB |
368 | { |
369 | CPUARMState *env; | |
aaed909a | 370 | uint32_t id; |
b26eefb6 | 371 | static int inited = 0; |
40f137e1 | 372 | |
aaed909a FB |
373 | id = cpu_arm_find_by_name(cpu_model); |
374 | if (id == 0) | |
375 | return NULL; | |
7267c094 | 376 | env = g_malloc0(sizeof(CPUARMState)); |
40f137e1 | 377 | cpu_exec_init(env); |
f4fc247b | 378 | if (tcg_enabled() && !inited) { |
b26eefb6 PB |
379 | inited = 1; |
380 | arm_translate_init(); | |
381 | } | |
382 | ||
01ba9816 | 383 | env->cpu_model_str = cpu_model; |
aaed909a | 384 | env->cp15.c0_cpuid = id; |
40f137e1 | 385 | cpu_reset(env); |
56aebc89 PB |
386 | if (arm_feature(env, ARM_FEATURE_NEON)) { |
387 | gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg, | |
388 | 51, "arm-neon.xml", 0); | |
389 | } else if (arm_feature(env, ARM_FEATURE_VFP3)) { | |
390 | gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg, | |
391 | 35, "arm-vfp3.xml", 0); | |
392 | } else if (arm_feature(env, ARM_FEATURE_VFP)) { | |
393 | gdb_register_coprocessor(env, vfp_gdb_get_reg, vfp_gdb_set_reg, | |
394 | 19, "arm-vfp.xml", 0); | |
395 | } | |
0bf46a40 | 396 | qemu_init_vcpu(env); |
40f137e1 PB |
397 | return env; |
398 | } | |
399 | ||
3371d272 PB |
400 | struct arm_cpu_t { |
401 | uint32_t id; | |
402 | const char *name; | |
403 | }; | |
404 | ||
405 | static const struct arm_cpu_t arm_cpu_names[] = { | |
406 | { ARM_CPUID_ARM926, "arm926"}, | |
ce819861 | 407 | { ARM_CPUID_ARM946, "arm946"}, |
3371d272 | 408 | { ARM_CPUID_ARM1026, "arm1026"}, |
9ee6e8bb | 409 | { ARM_CPUID_ARM1136, "arm1136"}, |
827df9f3 | 410 | { ARM_CPUID_ARM1136_R2, "arm1136-r2"}, |
7807eed9 | 411 | { ARM_CPUID_ARM1176, "arm1176"}, |
9ee6e8bb PB |
412 | { ARM_CPUID_ARM11MPCORE, "arm11mpcore"}, |
413 | { ARM_CPUID_CORTEXM3, "cortex-m3"}, | |
414 | { ARM_CPUID_CORTEXA8, "cortex-a8"}, | |
10055562 | 415 | { ARM_CPUID_CORTEXA9, "cortex-a9"}, |
c3d2689d | 416 | { ARM_CPUID_TI925T, "ti925t" }, |
c1713132 | 417 | { ARM_CPUID_PXA250, "pxa250" }, |
5bc95aa2 DES |
418 | { ARM_CPUID_SA1100, "sa1100" }, |
419 | { ARM_CPUID_SA1110, "sa1110" }, | |
c1713132 AZ |
420 | { ARM_CPUID_PXA255, "pxa255" }, |
421 | { ARM_CPUID_PXA260, "pxa260" }, | |
422 | { ARM_CPUID_PXA261, "pxa261" }, | |
423 | { ARM_CPUID_PXA262, "pxa262" }, | |
424 | { ARM_CPUID_PXA270, "pxa270" }, | |
425 | { ARM_CPUID_PXA270_A0, "pxa270-a0" }, | |
426 | { ARM_CPUID_PXA270_A1, "pxa270-a1" }, | |
427 | { ARM_CPUID_PXA270_B0, "pxa270-b0" }, | |
428 | { ARM_CPUID_PXA270_B1, "pxa270-b1" }, | |
429 | { ARM_CPUID_PXA270_C0, "pxa270-c0" }, | |
430 | { ARM_CPUID_PXA270_C5, "pxa270-c5" }, | |
9ee6e8bb | 431 | { ARM_CPUID_ANY, "any"}, |
3371d272 PB |
432 | { 0, NULL} |
433 | }; | |
434 | ||
9a78eead | 435 | void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf) |
5adb4839 PB |
436 | { |
437 | int i; | |
438 | ||
c732abe2 | 439 | (*cpu_fprintf)(f, "Available CPUs:\n"); |
5adb4839 | 440 | for (i = 0; arm_cpu_names[i].name; i++) { |
c732abe2 | 441 | (*cpu_fprintf)(f, " %s\n", arm_cpu_names[i].name); |
5adb4839 PB |
442 | } |
443 | } | |
444 | ||
aaed909a FB |
445 | /* return 0 if not found */ |
446 | static uint32_t cpu_arm_find_by_name(const char *name) | |
40f137e1 | 447 | { |
3371d272 PB |
448 | int i; |
449 | uint32_t id; | |
450 | ||
451 | id = 0; | |
3371d272 PB |
452 | for (i = 0; arm_cpu_names[i].name; i++) { |
453 | if (strcmp(name, arm_cpu_names[i].name) == 0) { | |
454 | id = arm_cpu_names[i].id; | |
455 | break; | |
456 | } | |
457 | } | |
aaed909a | 458 | return id; |
40f137e1 PB |
459 | } |
460 | ||
461 | void cpu_arm_close(CPUARMState *env) | |
462 | { | |
12b1de3a | 463 | g_free(env); |
40f137e1 PB |
464 | } |
465 | ||
2f4a40e5 AZ |
466 | uint32_t cpsr_read(CPUARMState *env) |
467 | { | |
468 | int ZF; | |
6fbe23d5 PB |
469 | ZF = (env->ZF == 0); |
470 | return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) | | |
2f4a40e5 AZ |
471 | (env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27) |
472 | | (env->thumb << 5) | ((env->condexec_bits & 3) << 25) | |
473 | | ((env->condexec_bits & 0xfc) << 8) | |
474 | | (env->GE << 16); | |
475 | } | |
476 | ||
477 | void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask) | |
478 | { | |
2f4a40e5 | 479 | if (mask & CPSR_NZCV) { |
6fbe23d5 PB |
480 | env->ZF = (~val) & CPSR_Z; |
481 | env->NF = val; | |
2f4a40e5 AZ |
482 | env->CF = (val >> 29) & 1; |
483 | env->VF = (val << 3) & 0x80000000; | |
484 | } | |
485 | if (mask & CPSR_Q) | |
486 | env->QF = ((val & CPSR_Q) != 0); | |
487 | if (mask & CPSR_T) | |
488 | env->thumb = ((val & CPSR_T) != 0); | |
489 | if (mask & CPSR_IT_0_1) { | |
490 | env->condexec_bits &= ~3; | |
491 | env->condexec_bits |= (val >> 25) & 3; | |
492 | } | |
493 | if (mask & CPSR_IT_2_7) { | |
494 | env->condexec_bits &= 3; | |
495 | env->condexec_bits |= (val >> 8) & 0xfc; | |
496 | } | |
497 | if (mask & CPSR_GE) { | |
498 | env->GE = (val >> 16) & 0xf; | |
499 | } | |
500 | ||
501 | if ((env->uncached_cpsr ^ val) & mask & CPSR_M) { | |
502 | switch_mode(env, val & CPSR_M); | |
503 | } | |
504 | mask &= ~CACHED_CPSR_BITS; | |
505 | env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask); | |
506 | } | |
507 | ||
b26eefb6 PB |
508 | /* Sign/zero extend */ |
509 | uint32_t HELPER(sxtb16)(uint32_t x) | |
510 | { | |
511 | uint32_t res; | |
512 | res = (uint16_t)(int8_t)x; | |
513 | res |= (uint32_t)(int8_t)(x >> 16) << 16; | |
514 | return res; | |
515 | } | |
516 | ||
517 | uint32_t HELPER(uxtb16)(uint32_t x) | |
518 | { | |
519 | uint32_t res; | |
520 | res = (uint16_t)(uint8_t)x; | |
521 | res |= (uint32_t)(uint8_t)(x >> 16) << 16; | |
522 | return res; | |
523 | } | |
524 | ||
f51bbbfe PB |
525 | uint32_t HELPER(clz)(uint32_t x) |
526 | { | |
7bbcb0af | 527 | return clz32(x); |
f51bbbfe PB |
528 | } |
529 | ||
3670669c PB |
530 | int32_t HELPER(sdiv)(int32_t num, int32_t den) |
531 | { | |
532 | if (den == 0) | |
533 | return 0; | |
686eeb93 AJ |
534 | if (num == INT_MIN && den == -1) |
535 | return INT_MIN; | |
3670669c PB |
536 | return num / den; |
537 | } | |
538 | ||
539 | uint32_t HELPER(udiv)(uint32_t num, uint32_t den) | |
540 | { | |
541 | if (den == 0) | |
542 | return 0; | |
543 | return num / den; | |
544 | } | |
545 | ||
546 | uint32_t HELPER(rbit)(uint32_t x) | |
547 | { | |
548 | x = ((x & 0xff000000) >> 24) | |
549 | | ((x & 0x00ff0000) >> 8) | |
550 | | ((x & 0x0000ff00) << 8) | |
551 | | ((x & 0x000000ff) << 24); | |
552 | x = ((x & 0xf0f0f0f0) >> 4) | |
553 | | ((x & 0x0f0f0f0f) << 4); | |
554 | x = ((x & 0x88888888) >> 3) | |
555 | | ((x & 0x44444444) >> 1) | |
556 | | ((x & 0x22222222) << 1) | |
557 | | ((x & 0x11111111) << 3); | |
558 | return x; | |
559 | } | |
560 | ||
ad69471c PB |
561 | uint32_t HELPER(abs)(uint32_t x) |
562 | { | |
563 | return ((int32_t)x < 0) ? -x : x; | |
564 | } | |
565 | ||
5fafdf24 | 566 | #if defined(CONFIG_USER_ONLY) |
b5ff1b31 FB |
567 | |
568 | void do_interrupt (CPUState *env) | |
569 | { | |
570 | env->exception_index = -1; | |
571 | } | |
572 | ||
573 | int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw, | |
97b348e7 | 574 | int mmu_idx) |
b5ff1b31 FB |
575 | { |
576 | if (rw == 2) { | |
577 | env->exception_index = EXCP_PREFETCH_ABORT; | |
578 | env->cp15.c6_insn = address; | |
579 | } else { | |
580 | env->exception_index = EXCP_DATA_ABORT; | |
581 | env->cp15.c6_data = address; | |
582 | } | |
583 | return 1; | |
584 | } | |
585 | ||
b5ff1b31 | 586 | /* These should probably raise undefined insn exceptions. */ |
8984bd2e | 587 | void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val) |
c1713132 AZ |
588 | { |
589 | int op1 = (insn >> 8) & 0xf; | |
590 | cpu_abort(env, "cp%i insn %08x\n", op1, insn); | |
591 | return; | |
592 | } | |
593 | ||
8984bd2e | 594 | uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn) |
c1713132 AZ |
595 | { |
596 | int op1 = (insn >> 8) & 0xf; | |
597 | cpu_abort(env, "cp%i insn %08x\n", op1, insn); | |
598 | return 0; | |
599 | } | |
600 | ||
8984bd2e | 601 | void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val) |
b5ff1b31 FB |
602 | { |
603 | cpu_abort(env, "cp15 insn %08x\n", insn); | |
604 | } | |
605 | ||
8984bd2e | 606 | uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) |
b5ff1b31 FB |
607 | { |
608 | cpu_abort(env, "cp15 insn %08x\n", insn); | |
b5ff1b31 FB |
609 | } |
610 | ||
9ee6e8bb | 611 | /* These should probably raise undefined insn exceptions. */ |
8984bd2e | 612 | void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val) |
9ee6e8bb PB |
613 | { |
614 | cpu_abort(env, "v7m_mrs %d\n", reg); | |
615 | } | |
616 | ||
8984bd2e | 617 | uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg) |
9ee6e8bb PB |
618 | { |
619 | cpu_abort(env, "v7m_mrs %d\n", reg); | |
620 | return 0; | |
621 | } | |
622 | ||
b5ff1b31 FB |
623 | void switch_mode(CPUState *env, int mode) |
624 | { | |
625 | if (mode != ARM_CPU_MODE_USR) | |
626 | cpu_abort(env, "Tried to switch out of user mode\n"); | |
627 | } | |
628 | ||
b0109805 | 629 | void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val) |
9ee6e8bb PB |
630 | { |
631 | cpu_abort(env, "banked r13 write\n"); | |
632 | } | |
633 | ||
b0109805 | 634 | uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode) |
9ee6e8bb PB |
635 | { |
636 | cpu_abort(env, "banked r13 read\n"); | |
637 | return 0; | |
638 | } | |
639 | ||
b5ff1b31 FB |
640 | #else |
641 | ||
8e71621f PB |
642 | extern int semihosting_enabled; |
643 | ||
b5ff1b31 FB |
644 | /* Map CPU modes onto saved register banks. */ |
645 | static inline int bank_number (int mode) | |
646 | { | |
647 | switch (mode) { | |
648 | case ARM_CPU_MODE_USR: | |
649 | case ARM_CPU_MODE_SYS: | |
650 | return 0; | |
651 | case ARM_CPU_MODE_SVC: | |
652 | return 1; | |
653 | case ARM_CPU_MODE_ABT: | |
654 | return 2; | |
655 | case ARM_CPU_MODE_UND: | |
656 | return 3; | |
657 | case ARM_CPU_MODE_IRQ: | |
658 | return 4; | |
659 | case ARM_CPU_MODE_FIQ: | |
660 | return 5; | |
661 | } | |
662 | cpu_abort(cpu_single_env, "Bad mode %x\n", mode); | |
663 | return -1; | |
664 | } | |
665 | ||
666 | void switch_mode(CPUState *env, int mode) | |
667 | { | |
668 | int old_mode; | |
669 | int i; | |
670 | ||
671 | old_mode = env->uncached_cpsr & CPSR_M; | |
672 | if (mode == old_mode) | |
673 | return; | |
674 | ||
675 | if (old_mode == ARM_CPU_MODE_FIQ) { | |
676 | memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); | |
8637c67f | 677 | memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); |
b5ff1b31 FB |
678 | } else if (mode == ARM_CPU_MODE_FIQ) { |
679 | memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); | |
8637c67f | 680 | memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); |
b5ff1b31 FB |
681 | } |
682 | ||
683 | i = bank_number(old_mode); | |
684 | env->banked_r13[i] = env->regs[13]; | |
685 | env->banked_r14[i] = env->regs[14]; | |
686 | env->banked_spsr[i] = env->spsr; | |
687 | ||
688 | i = bank_number(mode); | |
689 | env->regs[13] = env->banked_r13[i]; | |
690 | env->regs[14] = env->banked_r14[i]; | |
691 | env->spsr = env->banked_spsr[i]; | |
692 | } | |
693 | ||
9ee6e8bb PB |
694 | static void v7m_push(CPUARMState *env, uint32_t val) |
695 | { | |
696 | env->regs[13] -= 4; | |
697 | stl_phys(env->regs[13], val); | |
698 | } | |
699 | ||
700 | static uint32_t v7m_pop(CPUARMState *env) | |
701 | { | |
702 | uint32_t val; | |
703 | val = ldl_phys(env->regs[13]); | |
704 | env->regs[13] += 4; | |
705 | return val; | |
706 | } | |
707 | ||
708 | /* Switch to V7M main or process stack pointer. */ | |
709 | static void switch_v7m_sp(CPUARMState *env, int process) | |
710 | { | |
711 | uint32_t tmp; | |
712 | if (env->v7m.current_sp != process) { | |
713 | tmp = env->v7m.other_sp; | |
714 | env->v7m.other_sp = env->regs[13]; | |
715 | env->regs[13] = tmp; | |
716 | env->v7m.current_sp = process; | |
717 | } | |
718 | } | |
719 | ||
720 | static void do_v7m_exception_exit(CPUARMState *env) | |
721 | { | |
722 | uint32_t type; | |
723 | uint32_t xpsr; | |
724 | ||
725 | type = env->regs[15]; | |
726 | if (env->v7m.exception != 0) | |
983fe826 | 727 | armv7m_nvic_complete_irq(env->nvic, env->v7m.exception); |
9ee6e8bb PB |
728 | |
729 | /* Switch to the target stack. */ | |
730 | switch_v7m_sp(env, (type & 4) != 0); | |
731 | /* Pop registers. */ | |
732 | env->regs[0] = v7m_pop(env); | |
733 | env->regs[1] = v7m_pop(env); | |
734 | env->regs[2] = v7m_pop(env); | |
735 | env->regs[3] = v7m_pop(env); | |
736 | env->regs[12] = v7m_pop(env); | |
737 | env->regs[14] = v7m_pop(env); | |
738 | env->regs[15] = v7m_pop(env); | |
739 | xpsr = v7m_pop(env); | |
740 | xpsr_write(env, xpsr, 0xfffffdff); | |
741 | /* Undo stack alignment. */ | |
742 | if (xpsr & 0x200) | |
743 | env->regs[13] |= 4; | |
744 | /* ??? The exception return type specifies Thread/Handler mode. However | |
745 | this is also implied by the xPSR value. Not sure what to do | |
746 | if there is a mismatch. */ | |
747 | /* ??? Likewise for mismatches between the CONTROL register and the stack | |
748 | pointer. */ | |
749 | } | |
750 | ||
2b3ea315 | 751 | static void do_interrupt_v7m(CPUARMState *env) |
9ee6e8bb PB |
752 | { |
753 | uint32_t xpsr = xpsr_read(env); | |
754 | uint32_t lr; | |
755 | uint32_t addr; | |
756 | ||
757 | lr = 0xfffffff1; | |
758 | if (env->v7m.current_sp) | |
759 | lr |= 4; | |
760 | if (env->v7m.exception == 0) | |
761 | lr |= 8; | |
762 | ||
763 | /* For exceptions we just mark as pending on the NVIC, and let that | |
764 | handle it. */ | |
765 | /* TODO: Need to escalate if the current priority is higher than the | |
766 | one we're raising. */ | |
767 | switch (env->exception_index) { | |
768 | case EXCP_UDEF: | |
983fe826 | 769 | armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE); |
9ee6e8bb PB |
770 | return; |
771 | case EXCP_SWI: | |
772 | env->regs[15] += 2; | |
983fe826 | 773 | armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC); |
9ee6e8bb PB |
774 | return; |
775 | case EXCP_PREFETCH_ABORT: | |
776 | case EXCP_DATA_ABORT: | |
983fe826 | 777 | armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM); |
9ee6e8bb PB |
778 | return; |
779 | case EXCP_BKPT: | |
2ad207d4 PB |
780 | if (semihosting_enabled) { |
781 | int nr; | |
782 | nr = lduw_code(env->regs[15]) & 0xff; | |
783 | if (nr == 0xab) { | |
784 | env->regs[15] += 2; | |
785 | env->regs[0] = do_arm_semihosting(env); | |
786 | return; | |
787 | } | |
788 | } | |
983fe826 | 789 | armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG); |
9ee6e8bb PB |
790 | return; |
791 | case EXCP_IRQ: | |
983fe826 | 792 | env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic); |
9ee6e8bb PB |
793 | break; |
794 | case EXCP_EXCEPTION_EXIT: | |
795 | do_v7m_exception_exit(env); | |
796 | return; | |
797 | default: | |
798 | cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index); | |
799 | return; /* Never happens. Keep compiler happy. */ | |
800 | } | |
801 | ||
802 | /* Align stack pointer. */ | |
803 | /* ??? Should only do this if Configuration Control Register | |
804 | STACKALIGN bit is set. */ | |
805 | if (env->regs[13] & 4) { | |
ab19b0ec | 806 | env->regs[13] -= 4; |
9ee6e8bb PB |
807 | xpsr |= 0x200; |
808 | } | |
6c95676b | 809 | /* Switch to the handler mode. */ |
9ee6e8bb PB |
810 | v7m_push(env, xpsr); |
811 | v7m_push(env, env->regs[15]); | |
812 | v7m_push(env, env->regs[14]); | |
813 | v7m_push(env, env->regs[12]); | |
814 | v7m_push(env, env->regs[3]); | |
815 | v7m_push(env, env->regs[2]); | |
816 | v7m_push(env, env->regs[1]); | |
817 | v7m_push(env, env->regs[0]); | |
818 | switch_v7m_sp(env, 0); | |
819 | env->uncached_cpsr &= ~CPSR_IT; | |
820 | env->regs[14] = lr; | |
821 | addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4); | |
822 | env->regs[15] = addr & 0xfffffffe; | |
823 | env->thumb = addr & 1; | |
824 | } | |
825 | ||
b5ff1b31 FB |
826 | /* Handle a CPU exception. */ |
827 | void do_interrupt(CPUARMState *env) | |
828 | { | |
829 | uint32_t addr; | |
830 | uint32_t mask; | |
831 | int new_mode; | |
832 | uint32_t offset; | |
833 | ||
9ee6e8bb PB |
834 | if (IS_M(env)) { |
835 | do_interrupt_v7m(env); | |
836 | return; | |
837 | } | |
b5ff1b31 FB |
838 | /* TODO: Vectored interrupt controller. */ |
839 | switch (env->exception_index) { | |
840 | case EXCP_UDEF: | |
841 | new_mode = ARM_CPU_MODE_UND; | |
842 | addr = 0x04; | |
843 | mask = CPSR_I; | |
844 | if (env->thumb) | |
845 | offset = 2; | |
846 | else | |
847 | offset = 4; | |
848 | break; | |
849 | case EXCP_SWI: | |
8e71621f PB |
850 | if (semihosting_enabled) { |
851 | /* Check for semihosting interrupt. */ | |
852 | if (env->thumb) { | |
853 | mask = lduw_code(env->regs[15] - 2) & 0xff; | |
854 | } else { | |
855 | mask = ldl_code(env->regs[15] - 4) & 0xffffff; | |
856 | } | |
857 | /* Only intercept calls from privileged modes, to provide some | |
858 | semblance of security. */ | |
859 | if (((mask == 0x123456 && !env->thumb) | |
860 | || (mask == 0xab && env->thumb)) | |
861 | && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { | |
862 | env->regs[0] = do_arm_semihosting(env); | |
863 | return; | |
864 | } | |
865 | } | |
b5ff1b31 FB |
866 | new_mode = ARM_CPU_MODE_SVC; |
867 | addr = 0x08; | |
868 | mask = CPSR_I; | |
601d70b9 | 869 | /* The PC already points to the next instruction. */ |
b5ff1b31 FB |
870 | offset = 0; |
871 | break; | |
06c949e6 | 872 | case EXCP_BKPT: |
9ee6e8bb | 873 | /* See if this is a semihosting syscall. */ |
2ad207d4 | 874 | if (env->thumb && semihosting_enabled) { |
9ee6e8bb PB |
875 | mask = lduw_code(env->regs[15]) & 0xff; |
876 | if (mask == 0xab | |
877 | && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { | |
878 | env->regs[15] += 2; | |
879 | env->regs[0] = do_arm_semihosting(env); | |
880 | return; | |
881 | } | |
882 | } | |
81c05daf | 883 | env->cp15.c5_insn = 2; |
9ee6e8bb PB |
884 | /* Fall through to prefetch abort. */ |
885 | case EXCP_PREFETCH_ABORT: | |
b5ff1b31 FB |
886 | new_mode = ARM_CPU_MODE_ABT; |
887 | addr = 0x0c; | |
888 | mask = CPSR_A | CPSR_I; | |
889 | offset = 4; | |
890 | break; | |
891 | case EXCP_DATA_ABORT: | |
892 | new_mode = ARM_CPU_MODE_ABT; | |
893 | addr = 0x10; | |
894 | mask = CPSR_A | CPSR_I; | |
895 | offset = 8; | |
896 | break; | |
897 | case EXCP_IRQ: | |
898 | new_mode = ARM_CPU_MODE_IRQ; | |
899 | addr = 0x18; | |
900 | /* Disable IRQ and imprecise data aborts. */ | |
901 | mask = CPSR_A | CPSR_I; | |
902 | offset = 4; | |
903 | break; | |
904 | case EXCP_FIQ: | |
905 | new_mode = ARM_CPU_MODE_FIQ; | |
906 | addr = 0x1c; | |
907 | /* Disable FIQ, IRQ and imprecise data aborts. */ | |
908 | mask = CPSR_A | CPSR_I | CPSR_F; | |
909 | offset = 4; | |
910 | break; | |
911 | default: | |
912 | cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index); | |
913 | return; /* Never happens. Keep compiler happy. */ | |
914 | } | |
915 | /* High vectors. */ | |
916 | if (env->cp15.c1_sys & (1 << 13)) { | |
917 | addr += 0xffff0000; | |
918 | } | |
919 | switch_mode (env, new_mode); | |
920 | env->spsr = cpsr_read(env); | |
9ee6e8bb PB |
921 | /* Clear IT bits. */ |
922 | env->condexec_bits = 0; | |
30a8cac1 | 923 | /* Switch to the new mode, and to the correct instruction set. */ |
6d7e6326 | 924 | env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode; |
b5ff1b31 | 925 | env->uncached_cpsr |= mask; |
be5e7a76 DES |
926 | /* this is a lie, as the was no c1_sys on V4T/V5, but who cares |
927 | * and we should just guard the thumb mode on V4 */ | |
928 | if (arm_feature(env, ARM_FEATURE_V4T)) { | |
929 | env->thumb = (env->cp15.c1_sys & (1 << 30)) != 0; | |
930 | } | |
b5ff1b31 FB |
931 | env->regs[14] = env->regs[15] + offset; |
932 | env->regs[15] = addr; | |
933 | env->interrupt_request |= CPU_INTERRUPT_EXITTB; | |
934 | } | |
935 | ||
936 | /* Check section/page access permissions. | |
937 | Returns the page protection flags, or zero if the access is not | |
938 | permitted. */ | |
dd4ebc2e JCD |
939 | static inline int check_ap(CPUState *env, int ap, int domain_prot, |
940 | int access_type, int is_user) | |
b5ff1b31 | 941 | { |
9ee6e8bb PB |
942 | int prot_ro; |
943 | ||
dd4ebc2e | 944 | if (domain_prot == 3) { |
b5ff1b31 | 945 | return PAGE_READ | PAGE_WRITE; |
dd4ebc2e | 946 | } |
b5ff1b31 | 947 | |
9ee6e8bb PB |
948 | if (access_type == 1) |
949 | prot_ro = 0; | |
950 | else | |
951 | prot_ro = PAGE_READ; | |
952 | ||
b5ff1b31 FB |
953 | switch (ap) { |
954 | case 0: | |
78600320 | 955 | if (access_type == 1) |
b5ff1b31 FB |
956 | return 0; |
957 | switch ((env->cp15.c1_sys >> 8) & 3) { | |
958 | case 1: | |
959 | return is_user ? 0 : PAGE_READ; | |
960 | case 2: | |
961 | return PAGE_READ; | |
962 | default: | |
963 | return 0; | |
964 | } | |
965 | case 1: | |
966 | return is_user ? 0 : PAGE_READ | PAGE_WRITE; | |
967 | case 2: | |
968 | if (is_user) | |
9ee6e8bb | 969 | return prot_ro; |
b5ff1b31 FB |
970 | else |
971 | return PAGE_READ | PAGE_WRITE; | |
972 | case 3: | |
973 | return PAGE_READ | PAGE_WRITE; | |
d4934d18 | 974 | case 4: /* Reserved. */ |
9ee6e8bb PB |
975 | return 0; |
976 | case 5: | |
977 | return is_user ? 0 : prot_ro; | |
978 | case 6: | |
979 | return prot_ro; | |
d4934d18 | 980 | case 7: |
0ab06d83 | 981 | if (!arm_feature (env, ARM_FEATURE_V6K)) |
d4934d18 PB |
982 | return 0; |
983 | return prot_ro; | |
b5ff1b31 FB |
984 | default: |
985 | abort(); | |
986 | } | |
987 | } | |
988 | ||
b2fa1797 PB |
989 | static uint32_t get_level1_table_address(CPUState *env, uint32_t address) |
990 | { | |
991 | uint32_t table; | |
992 | ||
993 | if (address & env->cp15.c2_mask) | |
994 | table = env->cp15.c2_base1 & 0xffffc000; | |
995 | else | |
996 | table = env->cp15.c2_base0 & env->cp15.c2_base_mask; | |
997 | ||
998 | table |= (address >> 18) & 0x3ffc; | |
999 | return table; | |
1000 | } | |
1001 | ||
9ee6e8bb | 1002 | static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type, |
d4c430a8 PB |
1003 | int is_user, uint32_t *phys_ptr, int *prot, |
1004 | target_ulong *page_size) | |
b5ff1b31 FB |
1005 | { |
1006 | int code; | |
1007 | uint32_t table; | |
1008 | uint32_t desc; | |
1009 | int type; | |
1010 | int ap; | |
1011 | int domain; | |
dd4ebc2e | 1012 | int domain_prot; |
b5ff1b31 FB |
1013 | uint32_t phys_addr; |
1014 | ||
9ee6e8bb PB |
1015 | /* Pagetable walk. */ |
1016 | /* Lookup l1 descriptor. */ | |
b2fa1797 | 1017 | table = get_level1_table_address(env, address); |
9ee6e8bb PB |
1018 | desc = ldl_phys(table); |
1019 | type = (desc & 3); | |
dd4ebc2e JCD |
1020 | domain = (desc >> 5) & 0x0f; |
1021 | domain_prot = (env->cp15.c3 >> (domain * 2)) & 3; | |
9ee6e8bb | 1022 | if (type == 0) { |
601d70b9 | 1023 | /* Section translation fault. */ |
9ee6e8bb PB |
1024 | code = 5; |
1025 | goto do_fault; | |
1026 | } | |
dd4ebc2e | 1027 | if (domain_prot == 0 || domain_prot == 2) { |
9ee6e8bb PB |
1028 | if (type == 2) |
1029 | code = 9; /* Section domain fault. */ | |
1030 | else | |
1031 | code = 11; /* Page domain fault. */ | |
1032 | goto do_fault; | |
1033 | } | |
1034 | if (type == 2) { | |
1035 | /* 1Mb section. */ | |
1036 | phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); | |
1037 | ap = (desc >> 10) & 3; | |
1038 | code = 13; | |
d4c430a8 | 1039 | *page_size = 1024 * 1024; |
9ee6e8bb PB |
1040 | } else { |
1041 | /* Lookup l2 entry. */ | |
1042 | if (type == 1) { | |
1043 | /* Coarse pagetable. */ | |
1044 | table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); | |
1045 | } else { | |
1046 | /* Fine pagetable. */ | |
1047 | table = (desc & 0xfffff000) | ((address >> 8) & 0xffc); | |
1048 | } | |
1049 | desc = ldl_phys(table); | |
1050 | switch (desc & 3) { | |
1051 | case 0: /* Page translation fault. */ | |
1052 | code = 7; | |
1053 | goto do_fault; | |
1054 | case 1: /* 64k page. */ | |
1055 | phys_addr = (desc & 0xffff0000) | (address & 0xffff); | |
1056 | ap = (desc >> (4 + ((address >> 13) & 6))) & 3; | |
d4c430a8 | 1057 | *page_size = 0x10000; |
ce819861 | 1058 | break; |
9ee6e8bb PB |
1059 | case 2: /* 4k page. */ |
1060 | phys_addr = (desc & 0xfffff000) | (address & 0xfff); | |
1061 | ap = (desc >> (4 + ((address >> 13) & 6))) & 3; | |
d4c430a8 | 1062 | *page_size = 0x1000; |
ce819861 | 1063 | break; |
9ee6e8bb PB |
1064 | case 3: /* 1k page. */ |
1065 | if (type == 1) { | |
1066 | if (arm_feature(env, ARM_FEATURE_XSCALE)) { | |
1067 | phys_addr = (desc & 0xfffff000) | (address & 0xfff); | |
1068 | } else { | |
1069 | /* Page translation fault. */ | |
1070 | code = 7; | |
1071 | goto do_fault; | |
1072 | } | |
1073 | } else { | |
1074 | phys_addr = (desc & 0xfffffc00) | (address & 0x3ff); | |
1075 | } | |
1076 | ap = (desc >> 4) & 3; | |
d4c430a8 | 1077 | *page_size = 0x400; |
ce819861 PB |
1078 | break; |
1079 | default: | |
9ee6e8bb PB |
1080 | /* Never happens, but compiler isn't smart enough to tell. */ |
1081 | abort(); | |
ce819861 | 1082 | } |
9ee6e8bb PB |
1083 | code = 15; |
1084 | } | |
dd4ebc2e | 1085 | *prot = check_ap(env, ap, domain_prot, access_type, is_user); |
9ee6e8bb PB |
1086 | if (!*prot) { |
1087 | /* Access permission fault. */ | |
1088 | goto do_fault; | |
1089 | } | |
3ad493fc | 1090 | *prot |= PAGE_EXEC; |
9ee6e8bb PB |
1091 | *phys_ptr = phys_addr; |
1092 | return 0; | |
1093 | do_fault: | |
1094 | return code | (domain << 4); | |
1095 | } | |
1096 | ||
1097 | static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type, | |
d4c430a8 PB |
1098 | int is_user, uint32_t *phys_ptr, int *prot, |
1099 | target_ulong *page_size) | |
9ee6e8bb PB |
1100 | { |
1101 | int code; | |
1102 | uint32_t table; | |
1103 | uint32_t desc; | |
1104 | uint32_t xn; | |
1105 | int type; | |
1106 | int ap; | |
1107 | int domain; | |
dd4ebc2e | 1108 | int domain_prot; |
9ee6e8bb PB |
1109 | uint32_t phys_addr; |
1110 | ||
1111 | /* Pagetable walk. */ | |
1112 | /* Lookup l1 descriptor. */ | |
b2fa1797 | 1113 | table = get_level1_table_address(env, address); |
9ee6e8bb PB |
1114 | desc = ldl_phys(table); |
1115 | type = (desc & 3); | |
1116 | if (type == 0) { | |
601d70b9 | 1117 | /* Section translation fault. */ |
9ee6e8bb PB |
1118 | code = 5; |
1119 | domain = 0; | |
1120 | goto do_fault; | |
1121 | } else if (type == 2 && (desc & (1 << 18))) { | |
1122 | /* Supersection. */ | |
1123 | domain = 0; | |
b5ff1b31 | 1124 | } else { |
9ee6e8bb | 1125 | /* Section or page. */ |
dd4ebc2e | 1126 | domain = (desc >> 5) & 0x0f; |
9ee6e8bb | 1127 | } |
dd4ebc2e JCD |
1128 | domain_prot = (env->cp15.c3 >> (domain * 2)) & 3; |
1129 | if (domain_prot == 0 || domain_prot == 2) { | |
9ee6e8bb PB |
1130 | if (type == 2) |
1131 | code = 9; /* Section domain fault. */ | |
1132 | else | |
1133 | code = 11; /* Page domain fault. */ | |
1134 | goto do_fault; | |
1135 | } | |
1136 | if (type == 2) { | |
1137 | if (desc & (1 << 18)) { | |
1138 | /* Supersection. */ | |
1139 | phys_addr = (desc & 0xff000000) | (address & 0x00ffffff); | |
d4c430a8 | 1140 | *page_size = 0x1000000; |
b5ff1b31 | 1141 | } else { |
9ee6e8bb PB |
1142 | /* Section. */ |
1143 | phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); | |
d4c430a8 | 1144 | *page_size = 0x100000; |
b5ff1b31 | 1145 | } |
9ee6e8bb PB |
1146 | ap = ((desc >> 10) & 3) | ((desc >> 13) & 4); |
1147 | xn = desc & (1 << 4); | |
1148 | code = 13; | |
1149 | } else { | |
1150 | /* Lookup l2 entry. */ | |
1151 | table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); | |
1152 | desc = ldl_phys(table); | |
1153 | ap = ((desc >> 4) & 3) | ((desc >> 7) & 4); | |
1154 | switch (desc & 3) { | |
1155 | case 0: /* Page translation fault. */ | |
1156 | code = 7; | |
b5ff1b31 | 1157 | goto do_fault; |
9ee6e8bb PB |
1158 | case 1: /* 64k page. */ |
1159 | phys_addr = (desc & 0xffff0000) | (address & 0xffff); | |
1160 | xn = desc & (1 << 15); | |
d4c430a8 | 1161 | *page_size = 0x10000; |
9ee6e8bb PB |
1162 | break; |
1163 | case 2: case 3: /* 4k page. */ | |
1164 | phys_addr = (desc & 0xfffff000) | (address & 0xfff); | |
1165 | xn = desc & 1; | |
d4c430a8 | 1166 | *page_size = 0x1000; |
9ee6e8bb PB |
1167 | break; |
1168 | default: | |
1169 | /* Never happens, but compiler isn't smart enough to tell. */ | |
1170 | abort(); | |
b5ff1b31 | 1171 | } |
9ee6e8bb PB |
1172 | code = 15; |
1173 | } | |
dd4ebc2e | 1174 | if (domain_prot == 3) { |
c0034328 JR |
1175 | *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
1176 | } else { | |
1177 | if (xn && access_type == 2) | |
1178 | goto do_fault; | |
9ee6e8bb | 1179 | |
c0034328 JR |
1180 | /* The simplified model uses AP[0] as an access control bit. */ |
1181 | if ((env->cp15.c1_sys & (1 << 29)) && (ap & 1) == 0) { | |
1182 | /* Access flag fault. */ | |
1183 | code = (code == 15) ? 6 : 3; | |
1184 | goto do_fault; | |
1185 | } | |
dd4ebc2e | 1186 | *prot = check_ap(env, ap, domain_prot, access_type, is_user); |
c0034328 JR |
1187 | if (!*prot) { |
1188 | /* Access permission fault. */ | |
1189 | goto do_fault; | |
1190 | } | |
1191 | if (!xn) { | |
1192 | *prot |= PAGE_EXEC; | |
1193 | } | |
3ad493fc | 1194 | } |
9ee6e8bb | 1195 | *phys_ptr = phys_addr; |
b5ff1b31 FB |
1196 | return 0; |
1197 | do_fault: | |
1198 | return code | (domain << 4); | |
1199 | } | |
1200 | ||
9ee6e8bb PB |
1201 | static int get_phys_addr_mpu(CPUState *env, uint32_t address, int access_type, |
1202 | int is_user, uint32_t *phys_ptr, int *prot) | |
1203 | { | |
1204 | int n; | |
1205 | uint32_t mask; | |
1206 | uint32_t base; | |
1207 | ||
1208 | *phys_ptr = address; | |
1209 | for (n = 7; n >= 0; n--) { | |
1210 | base = env->cp15.c6_region[n]; | |
1211 | if ((base & 1) == 0) | |
1212 | continue; | |
1213 | mask = 1 << ((base >> 1) & 0x1f); | |
1214 | /* Keep this shift separate from the above to avoid an | |
1215 | (undefined) << 32. */ | |
1216 | mask = (mask << 1) - 1; | |
1217 | if (((base ^ address) & ~mask) == 0) | |
1218 | break; | |
1219 | } | |
1220 | if (n < 0) | |
1221 | return 2; | |
1222 | ||
1223 | if (access_type == 2) { | |
1224 | mask = env->cp15.c5_insn; | |
1225 | } else { | |
1226 | mask = env->cp15.c5_data; | |
1227 | } | |
1228 | mask = (mask >> (n * 4)) & 0xf; | |
1229 | switch (mask) { | |
1230 | case 0: | |
1231 | return 1; | |
1232 | case 1: | |
1233 | if (is_user) | |
1234 | return 1; | |
1235 | *prot = PAGE_READ | PAGE_WRITE; | |
1236 | break; | |
1237 | case 2: | |
1238 | *prot = PAGE_READ; | |
1239 | if (!is_user) | |
1240 | *prot |= PAGE_WRITE; | |
1241 | break; | |
1242 | case 3: | |
1243 | *prot = PAGE_READ | PAGE_WRITE; | |
1244 | break; | |
1245 | case 5: | |
1246 | if (is_user) | |
1247 | return 1; | |
1248 | *prot = PAGE_READ; | |
1249 | break; | |
1250 | case 6: | |
1251 | *prot = PAGE_READ; | |
1252 | break; | |
1253 | default: | |
1254 | /* Bad permission. */ | |
1255 | return 1; | |
1256 | } | |
3ad493fc | 1257 | *prot |= PAGE_EXEC; |
9ee6e8bb PB |
1258 | return 0; |
1259 | } | |
1260 | ||
1261 | static inline int get_phys_addr(CPUState *env, uint32_t address, | |
1262 | int access_type, int is_user, | |
d4c430a8 PB |
1263 | uint32_t *phys_ptr, int *prot, |
1264 | target_ulong *page_size) | |
9ee6e8bb PB |
1265 | { |
1266 | /* Fast Context Switch Extension. */ | |
1267 | if (address < 0x02000000) | |
1268 | address += env->cp15.c13_fcse; | |
1269 | ||
1270 | if ((env->cp15.c1_sys & 1) == 0) { | |
1271 | /* MMU/MPU disabled. */ | |
1272 | *phys_ptr = address; | |
3ad493fc | 1273 | *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
d4c430a8 | 1274 | *page_size = TARGET_PAGE_SIZE; |
9ee6e8bb PB |
1275 | return 0; |
1276 | } else if (arm_feature(env, ARM_FEATURE_MPU)) { | |
d4c430a8 | 1277 | *page_size = TARGET_PAGE_SIZE; |
9ee6e8bb PB |
1278 | return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr, |
1279 | prot); | |
1280 | } else if (env->cp15.c1_sys & (1 << 23)) { | |
1281 | return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr, | |
d4c430a8 | 1282 | prot, page_size); |
9ee6e8bb PB |
1283 | } else { |
1284 | return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr, | |
d4c430a8 | 1285 | prot, page_size); |
9ee6e8bb PB |
1286 | } |
1287 | } | |
1288 | ||
b5ff1b31 | 1289 | int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, |
97b348e7 | 1290 | int access_type, int mmu_idx) |
b5ff1b31 FB |
1291 | { |
1292 | uint32_t phys_addr; | |
d4c430a8 | 1293 | target_ulong page_size; |
b5ff1b31 | 1294 | int prot; |
6ebbf390 | 1295 | int ret, is_user; |
b5ff1b31 | 1296 | |
6ebbf390 | 1297 | is_user = mmu_idx == MMU_USER_IDX; |
d4c430a8 PB |
1298 | ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot, |
1299 | &page_size); | |
b5ff1b31 FB |
1300 | if (ret == 0) { |
1301 | /* Map a single [sub]page. */ | |
1302 | phys_addr &= ~(uint32_t)0x3ff; | |
1303 | address &= ~(uint32_t)0x3ff; | |
3ad493fc | 1304 | tlb_set_page (env, address, phys_addr, prot, mmu_idx, page_size); |
d4c430a8 | 1305 | return 0; |
b5ff1b31 FB |
1306 | } |
1307 | ||
1308 | if (access_type == 2) { | |
1309 | env->cp15.c5_insn = ret; | |
1310 | env->cp15.c6_insn = address; | |
1311 | env->exception_index = EXCP_PREFETCH_ABORT; | |
1312 | } else { | |
1313 | env->cp15.c5_data = ret; | |
9ee6e8bb PB |
1314 | if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) |
1315 | env->cp15.c5_data |= (1 << 11); | |
b5ff1b31 FB |
1316 | env->cp15.c6_data = address; |
1317 | env->exception_index = EXCP_DATA_ABORT; | |
1318 | } | |
1319 | return 1; | |
1320 | } | |
1321 | ||
c227f099 | 1322 | target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
b5ff1b31 FB |
1323 | { |
1324 | uint32_t phys_addr; | |
d4c430a8 | 1325 | target_ulong page_size; |
b5ff1b31 FB |
1326 | int prot; |
1327 | int ret; | |
1328 | ||
d4c430a8 | 1329 | ret = get_phys_addr(env, addr, 0, 0, &phys_addr, &prot, &page_size); |
b5ff1b31 FB |
1330 | |
1331 | if (ret != 0) | |
1332 | return -1; | |
1333 | ||
1334 | return phys_addr; | |
1335 | } | |
1336 | ||
8984bd2e | 1337 | void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val) |
c1713132 AZ |
1338 | { |
1339 | int cp_num = (insn >> 8) & 0xf; | |
1340 | int cp_info = (insn >> 5) & 7; | |
1341 | int src = (insn >> 16) & 0xf; | |
1342 | int operand = insn & 0xf; | |
1343 | ||
1344 | if (env->cp[cp_num].cp_write) | |
1345 | env->cp[cp_num].cp_write(env->cp[cp_num].opaque, | |
1346 | cp_info, src, operand, val); | |
1347 | } | |
1348 | ||
8984bd2e | 1349 | uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn) |
c1713132 AZ |
1350 | { |
1351 | int cp_num = (insn >> 8) & 0xf; | |
1352 | int cp_info = (insn >> 5) & 7; | |
1353 | int dest = (insn >> 16) & 0xf; | |
1354 | int operand = insn & 0xf; | |
1355 | ||
1356 | if (env->cp[cp_num].cp_read) | |
1357 | return env->cp[cp_num].cp_read(env->cp[cp_num].opaque, | |
1358 | cp_info, dest, operand); | |
1359 | return 0; | |
1360 | } | |
1361 | ||
ce819861 PB |
1362 | /* Return basic MPU access permission bits. */ |
1363 | static uint32_t simple_mpu_ap_bits(uint32_t val) | |
1364 | { | |
1365 | uint32_t ret; | |
1366 | uint32_t mask; | |
1367 | int i; | |
1368 | ret = 0; | |
1369 | mask = 3; | |
1370 | for (i = 0; i < 16; i += 2) { | |
1371 | ret |= (val >> i) & mask; | |
1372 | mask <<= 2; | |
1373 | } | |
1374 | return ret; | |
1375 | } | |
1376 | ||
1377 | /* Pad basic MPU access permission bits to extended format. */ | |
1378 | static uint32_t extended_mpu_ap_bits(uint32_t val) | |
1379 | { | |
1380 | uint32_t ret; | |
1381 | uint32_t mask; | |
1382 | int i; | |
1383 | ret = 0; | |
1384 | mask = 3; | |
1385 | for (i = 0; i < 16; i += 2) { | |
1386 | ret |= (val & mask) << i; | |
1387 | mask <<= 2; | |
1388 | } | |
1389 | return ret; | |
1390 | } | |
1391 | ||
8984bd2e | 1392 | void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val) |
b5ff1b31 | 1393 | { |
9ee6e8bb PB |
1394 | int op1; |
1395 | int op2; | |
1396 | int crm; | |
b5ff1b31 | 1397 | |
9ee6e8bb | 1398 | op1 = (insn >> 21) & 7; |
b5ff1b31 | 1399 | op2 = (insn >> 5) & 7; |
ce819861 | 1400 | crm = insn & 0xf; |
b5ff1b31 | 1401 | switch ((insn >> 16) & 0xf) { |
9ee6e8bb | 1402 | case 0: |
9ee6e8bb | 1403 | /* ID codes. */ |
610c3c8a AZ |
1404 | if (arm_feature(env, ARM_FEATURE_XSCALE)) |
1405 | break; | |
c3d2689d AZ |
1406 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) |
1407 | break; | |
a49ea279 PB |
1408 | if (arm_feature(env, ARM_FEATURE_V7) |
1409 | && op1 == 2 && crm == 0 && op2 == 0) { | |
1410 | env->cp15.c0_cssel = val & 0xf; | |
1411 | break; | |
1412 | } | |
b5ff1b31 FB |
1413 | goto bad_reg; |
1414 | case 1: /* System configuration. */ | |
c3d2689d AZ |
1415 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) |
1416 | op2 = 0; | |
b5ff1b31 FB |
1417 | switch (op2) { |
1418 | case 0: | |
ce819861 | 1419 | if (!arm_feature(env, ARM_FEATURE_XSCALE) || crm == 0) |
c1713132 | 1420 | env->cp15.c1_sys = val; |
b5ff1b31 FB |
1421 | /* ??? Lots of these bits are not implemented. */ |
1422 | /* This may enable/disable the MMU, so do a TLB flush. */ | |
1423 | tlb_flush(env, 1); | |
1424 | break; | |
61cc8701 | 1425 | case 1: /* Auxiliary control register. */ |
610c3c8a AZ |
1426 | if (arm_feature(env, ARM_FEATURE_XSCALE)) { |
1427 | env->cp15.c1_xscaleauxcr = val; | |
c1713132 | 1428 | break; |
610c3c8a | 1429 | } |
9ee6e8bb PB |
1430 | /* Not implemented. */ |
1431 | break; | |
b5ff1b31 | 1432 | case 2: |
610c3c8a AZ |
1433 | if (arm_feature(env, ARM_FEATURE_XSCALE)) |
1434 | goto bad_reg; | |
4be27dbb PB |
1435 | if (env->cp15.c1_coproc != val) { |
1436 | env->cp15.c1_coproc = val; | |
1437 | /* ??? Is this safe when called from within a TB? */ | |
1438 | tb_flush(env); | |
1439 | } | |
c1713132 | 1440 | break; |
b5ff1b31 FB |
1441 | default: |
1442 | goto bad_reg; | |
1443 | } | |
1444 | break; | |
ce819861 PB |
1445 | case 2: /* MMU Page table control / MPU cache control. */ |
1446 | if (arm_feature(env, ARM_FEATURE_MPU)) { | |
1447 | switch (op2) { | |
1448 | case 0: | |
1449 | env->cp15.c2_data = val; | |
1450 | break; | |
1451 | case 1: | |
1452 | env->cp15.c2_insn = val; | |
1453 | break; | |
1454 | default: | |
1455 | goto bad_reg; | |
1456 | } | |
1457 | } else { | |
9ee6e8bb PB |
1458 | switch (op2) { |
1459 | case 0: | |
1460 | env->cp15.c2_base0 = val; | |
1461 | break; | |
1462 | case 1: | |
1463 | env->cp15.c2_base1 = val; | |
1464 | break; | |
1465 | case 2: | |
b2fa1797 PB |
1466 | val &= 7; |
1467 | env->cp15.c2_control = val; | |
9ee6e8bb | 1468 | env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val); |
b2fa1797 | 1469 | env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> val); |
9ee6e8bb PB |
1470 | break; |
1471 | default: | |
1472 | goto bad_reg; | |
1473 | } | |
ce819861 | 1474 | } |
b5ff1b31 | 1475 | break; |
ce819861 | 1476 | case 3: /* MMU Domain access control / MPU write buffer control. */ |
b5ff1b31 | 1477 | env->cp15.c3 = val; |
405ee3ad | 1478 | tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */ |
b5ff1b31 FB |
1479 | break; |
1480 | case 4: /* Reserved. */ | |
1481 | goto bad_reg; | |
ce819861 | 1482 | case 5: /* MMU Fault status / MPU access permission. */ |
c3d2689d AZ |
1483 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) |
1484 | op2 = 0; | |
b5ff1b31 FB |
1485 | switch (op2) { |
1486 | case 0: | |
ce819861 PB |
1487 | if (arm_feature(env, ARM_FEATURE_MPU)) |
1488 | val = extended_mpu_ap_bits(val); | |
b5ff1b31 FB |
1489 | env->cp15.c5_data = val; |
1490 | break; | |
1491 | case 1: | |
ce819861 PB |
1492 | if (arm_feature(env, ARM_FEATURE_MPU)) |
1493 | val = extended_mpu_ap_bits(val); | |
b5ff1b31 FB |
1494 | env->cp15.c5_insn = val; |
1495 | break; | |
ce819861 PB |
1496 | case 2: |
1497 | if (!arm_feature(env, ARM_FEATURE_MPU)) | |
1498 | goto bad_reg; | |
1499 | env->cp15.c5_data = val; | |
b5ff1b31 | 1500 | break; |
ce819861 PB |
1501 | case 3: |
1502 | if (!arm_feature(env, ARM_FEATURE_MPU)) | |
1503 | goto bad_reg; | |
1504 | env->cp15.c5_insn = val; | |
b5ff1b31 FB |
1505 | break; |
1506 | default: | |
1507 | goto bad_reg; | |
1508 | } | |
1509 | break; | |
ce819861 PB |
1510 | case 6: /* MMU Fault address / MPU base/size. */ |
1511 | if (arm_feature(env, ARM_FEATURE_MPU)) { | |
1512 | if (crm >= 8) | |
1513 | goto bad_reg; | |
1514 | env->cp15.c6_region[crm] = val; | |
1515 | } else { | |
c3d2689d AZ |
1516 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) |
1517 | op2 = 0; | |
ce819861 PB |
1518 | switch (op2) { |
1519 | case 0: | |
1520 | env->cp15.c6_data = val; | |
1521 | break; | |
9ee6e8bb PB |
1522 | case 1: /* ??? This is WFAR on armv6 */ |
1523 | case 2: | |
ce819861 PB |
1524 | env->cp15.c6_insn = val; |
1525 | break; | |
1526 | default: | |
1527 | goto bad_reg; | |
1528 | } | |
1529 | } | |
1530 | break; | |
b5ff1b31 | 1531 | case 7: /* Cache control. */ |
c3d2689d AZ |
1532 | env->cp15.c15_i_max = 0x000; |
1533 | env->cp15.c15_i_min = 0xff0; | |
f8bf8606 AL |
1534 | if (op1 != 0) { |
1535 | goto bad_reg; | |
1536 | } | |
1537 | /* No cache, so nothing to do except VA->PA translations. */ | |
906879a9 | 1538 | if (arm_feature(env, ARM_FEATURE_VAPA)) { |
f8bf8606 AL |
1539 | switch (crm) { |
1540 | case 4: | |
1541 | if (arm_feature(env, ARM_FEATURE_V7)) { | |
1542 | env->cp15.c7_par = val & 0xfffff6ff; | |
1543 | } else { | |
1544 | env->cp15.c7_par = val & 0xfffff1ff; | |
1545 | } | |
1546 | break; | |
1547 | case 8: { | |
1548 | uint32_t phys_addr; | |
1549 | target_ulong page_size; | |
1550 | int prot; | |
1551 | int ret, is_user = op2 & 2; | |
1552 | int access_type = op2 & 1; | |
1553 | ||
1554 | if (op2 & 4) { | |
1555 | /* Other states are only available with TrustZone */ | |
1556 | goto bad_reg; | |
1557 | } | |
1558 | ret = get_phys_addr(env, val, access_type, is_user, | |
1559 | &phys_addr, &prot, &page_size); | |
1560 | if (ret == 0) { | |
1561 | /* We do not set any attribute bits in the PAR */ | |
1562 | if (page_size == (1 << 24) | |
1563 | && arm_feature(env, ARM_FEATURE_V7)) { | |
1564 | env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1; | |
1565 | } else { | |
1566 | env->cp15.c7_par = phys_addr & 0xfffff000; | |
1567 | } | |
1568 | } else { | |
1569 | env->cp15.c7_par = ((ret & (10 << 1)) >> 5) | | |
1570 | ((ret & (12 << 1)) >> 6) | | |
1571 | ((ret & 0xf) << 1) | 1; | |
1572 | } | |
1573 | break; | |
1574 | } | |
1575 | } | |
1576 | } | |
b5ff1b31 FB |
1577 | break; |
1578 | case 8: /* MMU TLB control. */ | |
1579 | switch (op2) { | |
1580 | case 0: /* Invalidate all. */ | |
1581 | tlb_flush(env, 0); | |
1582 | break; | |
1583 | case 1: /* Invalidate single TLB entry. */ | |
d4c430a8 | 1584 | tlb_flush_page(env, val & TARGET_PAGE_MASK); |
b5ff1b31 | 1585 | break; |
9ee6e8bb PB |
1586 | case 2: /* Invalidate on ASID. */ |
1587 | tlb_flush(env, val == 0); | |
1588 | break; | |
1589 | case 3: /* Invalidate single entry on MVA. */ | |
1590 | /* ??? This is like case 1, but ignores ASID. */ | |
1591 | tlb_flush(env, 1); | |
1592 | break; | |
b5ff1b31 FB |
1593 | default: |
1594 | goto bad_reg; | |
1595 | } | |
1596 | break; | |
ce819861 | 1597 | case 9: |
c3d2689d AZ |
1598 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) |
1599 | break; | |
5bc95aa2 DES |
1600 | if (arm_feature(env, ARM_FEATURE_STRONGARM)) |
1601 | break; /* Ignore ReadBuffer access */ | |
ce819861 PB |
1602 | switch (crm) { |
1603 | case 0: /* Cache lockdown. */ | |
9ee6e8bb PB |
1604 | switch (op1) { |
1605 | case 0: /* L1 cache. */ | |
1606 | switch (op2) { | |
1607 | case 0: | |
1608 | env->cp15.c9_data = val; | |
1609 | break; | |
1610 | case 1: | |
1611 | env->cp15.c9_insn = val; | |
1612 | break; | |
1613 | default: | |
1614 | goto bad_reg; | |
1615 | } | |
1616 | break; | |
1617 | case 1: /* L2 cache. */ | |
1618 | /* Ignore writes to L2 lockdown/auxiliary registers. */ | |
1619 | break; | |
1620 | default: | |
1621 | goto bad_reg; | |
1622 | } | |
1623 | break; | |
ce819861 PB |
1624 | case 1: /* TCM memory region registers. */ |
1625 | /* Not implemented. */ | |
1626 | goto bad_reg; | |
74594c9d PM |
1627 | case 12: /* Performance monitor control */ |
1628 | /* Performance monitors are implementation defined in v7, | |
1629 | * but with an ARM recommended set of registers, which we | |
1630 | * follow (although we don't actually implement any counters) | |
1631 | */ | |
1632 | if (!arm_feature(env, ARM_FEATURE_V7)) { | |
1633 | goto bad_reg; | |
1634 | } | |
1635 | switch (op2) { | |
1636 | case 0: /* performance monitor control register */ | |
1637 | /* only the DP, X, D and E bits are writable */ | |
1638 | env->cp15.c9_pmcr &= ~0x39; | |
1639 | env->cp15.c9_pmcr |= (val & 0x39); | |
1640 | break; | |
1641 | case 1: /* Count enable set register */ | |
1642 | val &= (1 << 31); | |
1643 | env->cp15.c9_pmcnten |= val; | |
1644 | break; | |
1645 | case 2: /* Count enable clear */ | |
1646 | val &= (1 << 31); | |
1647 | env->cp15.c9_pmcnten &= ~val; | |
1648 | break; | |
1649 | case 3: /* Overflow flag status */ | |
1650 | env->cp15.c9_pmovsr &= ~val; | |
1651 | break; | |
1652 | case 4: /* Software increment */ | |
1653 | /* RAZ/WI since we don't implement the software-count event */ | |
1654 | break; | |
1655 | case 5: /* Event counter selection register */ | |
1656 | /* Since we don't implement any events, writing to this register | |
1657 | * is actually UNPREDICTABLE. So we choose to RAZ/WI. | |
1658 | */ | |
1659 | break; | |
1660 | default: | |
1661 | goto bad_reg; | |
1662 | } | |
1663 | break; | |
1664 | case 13: /* Performance counters */ | |
1665 | if (!arm_feature(env, ARM_FEATURE_V7)) { | |
1666 | goto bad_reg; | |
1667 | } | |
1668 | switch (op2) { | |
1669 | case 0: /* Cycle count register: not implemented, so RAZ/WI */ | |
1670 | break; | |
1671 | case 1: /* Event type select */ | |
1672 | env->cp15.c9_pmxevtyper = val & 0xff; | |
1673 | break; | |
1674 | case 2: /* Event count register */ | |
1675 | /* Unimplemented (we have no events), RAZ/WI */ | |
1676 | break; | |
1677 | default: | |
1678 | goto bad_reg; | |
1679 | } | |
1680 | break; | |
1681 | case 14: /* Performance monitor control */ | |
1682 | if (!arm_feature(env, ARM_FEATURE_V7)) { | |
1683 | goto bad_reg; | |
1684 | } | |
1685 | switch (op2) { | |
1686 | case 0: /* user enable */ | |
1687 | env->cp15.c9_pmuserenr = val & 1; | |
1688 | /* changes access rights for cp registers, so flush tbs */ | |
1689 | tb_flush(env); | |
1690 | break; | |
1691 | case 1: /* interrupt enable set */ | |
1692 | /* We have no event counters so only the C bit can be changed */ | |
1693 | val &= (1 << 31); | |
1694 | env->cp15.c9_pminten |= val; | |
1695 | break; | |
1696 | case 2: /* interrupt enable clear */ | |
1697 | val &= (1 << 31); | |
1698 | env->cp15.c9_pminten &= ~val; | |
1699 | break; | |
1700 | } | |
1701 | break; | |
b5ff1b31 FB |
1702 | default: |
1703 | goto bad_reg; | |
1704 | } | |
1705 | break; | |
1706 | case 10: /* MMU TLB lockdown. */ | |
1707 | /* ??? TLB lockdown not implemented. */ | |
1708 | break; | |
b5ff1b31 FB |
1709 | case 12: /* Reserved. */ |
1710 | goto bad_reg; | |
1711 | case 13: /* Process ID. */ | |
1712 | switch (op2) { | |
1713 | case 0: | |
d07edbfa PB |
1714 | /* Unlike real hardware the qemu TLB uses virtual addresses, |
1715 | not modified virtual addresses, so this causes a TLB flush. | |
1716 | */ | |
1717 | if (env->cp15.c13_fcse != val) | |
1718 | tlb_flush(env, 1); | |
1719 | env->cp15.c13_fcse = val; | |
b5ff1b31 FB |
1720 | break; |
1721 | case 1: | |
d07edbfa | 1722 | /* This changes the ASID, so do a TLB flush. */ |
ce819861 PB |
1723 | if (env->cp15.c13_context != val |
1724 | && !arm_feature(env, ARM_FEATURE_MPU)) | |
d07edbfa PB |
1725 | tlb_flush(env, 0); |
1726 | env->cp15.c13_context = val; | |
b5ff1b31 FB |
1727 | break; |
1728 | default: | |
1729 | goto bad_reg; | |
1730 | } | |
1731 | break; | |
1732 | case 14: /* Reserved. */ | |
1733 | goto bad_reg; | |
1734 | case 15: /* Implementation specific. */ | |
c1713132 | 1735 | if (arm_feature(env, ARM_FEATURE_XSCALE)) { |
ce819861 | 1736 | if (op2 == 0 && crm == 1) { |
2e23213f AZ |
1737 | if (env->cp15.c15_cpar != (val & 0x3fff)) { |
1738 | /* Changes cp0 to cp13 behavior, so needs a TB flush. */ | |
1739 | tb_flush(env); | |
1740 | env->cp15.c15_cpar = val & 0x3fff; | |
1741 | } | |
c1713132 AZ |
1742 | break; |
1743 | } | |
1744 | goto bad_reg; | |
1745 | } | |
c3d2689d AZ |
1746 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) { |
1747 | switch (crm) { | |
1748 | case 0: | |
1749 | break; | |
1750 | case 1: /* Set TI925T configuration. */ | |
1751 | env->cp15.c15_ticonfig = val & 0xe7; | |
1752 | env->cp15.c0_cpuid = (val & (1 << 5)) ? /* OS_TYPE bit */ | |
1753 | ARM_CPUID_TI915T : ARM_CPUID_TI925T; | |
1754 | break; | |
1755 | case 2: /* Set I_max. */ | |
1756 | env->cp15.c15_i_max = val; | |
1757 | break; | |
1758 | case 3: /* Set I_min. */ | |
1759 | env->cp15.c15_i_min = val; | |
1760 | break; | |
1761 | case 4: /* Set thread-ID. */ | |
1762 | env->cp15.c15_threadid = val & 0xffff; | |
1763 | break; | |
1764 | case 8: /* Wait-for-interrupt (deprecated). */ | |
1765 | cpu_interrupt(env, CPU_INTERRUPT_HALT); | |
1766 | break; | |
1767 | default: | |
1768 | goto bad_reg; | |
1769 | } | |
1770 | } | |
b5ff1b31 FB |
1771 | break; |
1772 | } | |
1773 | return; | |
1774 | bad_reg: | |
1775 | /* ??? For debugging only. Should raise illegal instruction exception. */ | |
9ee6e8bb PB |
1776 | cpu_abort(env, "Unimplemented cp15 register write (c%d, c%d, {%d, %d})\n", |
1777 | (insn >> 16) & 0xf, crm, op1, op2); | |
b5ff1b31 FB |
1778 | } |
1779 | ||
8984bd2e | 1780 | uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) |
b5ff1b31 | 1781 | { |
9ee6e8bb PB |
1782 | int op1; |
1783 | int op2; | |
1784 | int crm; | |
b5ff1b31 | 1785 | |
9ee6e8bb | 1786 | op1 = (insn >> 21) & 7; |
b5ff1b31 | 1787 | op2 = (insn >> 5) & 7; |
c3d2689d | 1788 | crm = insn & 0xf; |
b5ff1b31 FB |
1789 | switch ((insn >> 16) & 0xf) { |
1790 | case 0: /* ID codes. */ | |
9ee6e8bb PB |
1791 | switch (op1) { |
1792 | case 0: | |
1793 | switch (crm) { | |
1794 | case 0: | |
1795 | switch (op2) { | |
1796 | case 0: /* Device ID. */ | |
1797 | return env->cp15.c0_cpuid; | |
1798 | case 1: /* Cache Type. */ | |
1799 | return env->cp15.c0_cachetype; | |
1800 | case 2: /* TCM status. */ | |
1801 | return 0; | |
1802 | case 3: /* TLB type register. */ | |
1803 | return 0; /* No lockable TLB entries. */ | |
607b4b08 PM |
1804 | case 5: /* MPIDR */ |
1805 | /* The MPIDR was standardised in v7; prior to | |
1806 | * this it was implemented only in the 11MPCore. | |
1807 | * For all other pre-v7 cores it does not exist. | |
1808 | */ | |
1809 | if (arm_feature(env, ARM_FEATURE_V7) || | |
1810 | ARM_CPUID(env) == ARM_CPUID_ARM11MPCORE) { | |
1811 | int mpidr = env->cpu_index; | |
1812 | /* We don't support setting cluster ID ([8..11]) | |
1813 | * so these bits always RAZ. | |
1814 | */ | |
1815 | if (arm_feature(env, ARM_FEATURE_V7MP)) { | |
1816 | mpidr |= (1 << 31); | |
1817 | /* Cores which are uniprocessor (non-coherent) | |
1818 | * but still implement the MP extensions set | |
1819 | * bit 30. (For instance, A9UP.) However we do | |
1820 | * not currently model any of those cores. | |
1821 | */ | |
1822 | } | |
1823 | return mpidr; | |
10055562 | 1824 | } |
607b4b08 | 1825 | /* otherwise fall through to the unimplemented-reg case */ |
9ee6e8bb PB |
1826 | default: |
1827 | goto bad_reg; | |
1828 | } | |
1829 | case 1: | |
1830 | if (!arm_feature(env, ARM_FEATURE_V6)) | |
1831 | goto bad_reg; | |
1832 | return env->cp15.c0_c1[op2]; | |
1833 | case 2: | |
1834 | if (!arm_feature(env, ARM_FEATURE_V6)) | |
1835 | goto bad_reg; | |
1836 | return env->cp15.c0_c2[op2]; | |
1837 | case 3: case 4: case 5: case 6: case 7: | |
1838 | return 0; | |
1839 | default: | |
1840 | goto bad_reg; | |
1841 | } | |
1842 | case 1: | |
1843 | /* These registers aren't documented on arm11 cores. However | |
1844 | Linux looks at them anyway. */ | |
1845 | if (!arm_feature(env, ARM_FEATURE_V6)) | |
1846 | goto bad_reg; | |
1847 | if (crm != 0) | |
1848 | goto bad_reg; | |
a49ea279 PB |
1849 | if (!arm_feature(env, ARM_FEATURE_V7)) |
1850 | return 0; | |
1851 | ||
1852 | switch (op2) { | |
1853 | case 0: | |
1854 | return env->cp15.c0_ccsid[env->cp15.c0_cssel]; | |
1855 | case 1: | |
1856 | return env->cp15.c0_clid; | |
1857 | case 7: | |
1858 | return 0; | |
1859 | } | |
1860 | goto bad_reg; | |
1861 | case 2: | |
1862 | if (op2 != 0 || crm != 0) | |
610c3c8a | 1863 | goto bad_reg; |
a49ea279 | 1864 | return env->cp15.c0_cssel; |
9ee6e8bb PB |
1865 | default: |
1866 | goto bad_reg; | |
b5ff1b31 FB |
1867 | } |
1868 | case 1: /* System configuration. */ | |
c3d2689d AZ |
1869 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) |
1870 | op2 = 0; | |
b5ff1b31 FB |
1871 | switch (op2) { |
1872 | case 0: /* Control register. */ | |
1873 | return env->cp15.c1_sys; | |
1874 | case 1: /* Auxiliary control register. */ | |
c1713132 | 1875 | if (arm_feature(env, ARM_FEATURE_XSCALE)) |
610c3c8a | 1876 | return env->cp15.c1_xscaleauxcr; |
9ee6e8bb PB |
1877 | if (!arm_feature(env, ARM_FEATURE_AUXCR)) |
1878 | goto bad_reg; | |
1879 | switch (ARM_CPUID(env)) { | |
1880 | case ARM_CPUID_ARM1026: | |
1881 | return 1; | |
1882 | case ARM_CPUID_ARM1136: | |
827df9f3 | 1883 | case ARM_CPUID_ARM1136_R2: |
7807eed9 | 1884 | case ARM_CPUID_ARM1176: |
9ee6e8bb PB |
1885 | return 7; |
1886 | case ARM_CPUID_ARM11MPCORE: | |
1887 | return 1; | |
1888 | case ARM_CPUID_CORTEXA8: | |
533d177a | 1889 | return 2; |
10055562 PB |
1890 | case ARM_CPUID_CORTEXA9: |
1891 | return 0; | |
9ee6e8bb PB |
1892 | default: |
1893 | goto bad_reg; | |
1894 | } | |
b5ff1b31 | 1895 | case 2: /* Coprocessor access register. */ |
610c3c8a AZ |
1896 | if (arm_feature(env, ARM_FEATURE_XSCALE)) |
1897 | goto bad_reg; | |
b5ff1b31 FB |
1898 | return env->cp15.c1_coproc; |
1899 | default: | |
1900 | goto bad_reg; | |
1901 | } | |
ce819861 PB |
1902 | case 2: /* MMU Page table control / MPU cache control. */ |
1903 | if (arm_feature(env, ARM_FEATURE_MPU)) { | |
1904 | switch (op2) { | |
1905 | case 0: | |
1906 | return env->cp15.c2_data; | |
1907 | break; | |
1908 | case 1: | |
1909 | return env->cp15.c2_insn; | |
1910 | break; | |
1911 | default: | |
1912 | goto bad_reg; | |
1913 | } | |
1914 | } else { | |
9ee6e8bb PB |
1915 | switch (op2) { |
1916 | case 0: | |
1917 | return env->cp15.c2_base0; | |
1918 | case 1: | |
1919 | return env->cp15.c2_base1; | |
1920 | case 2: | |
b2fa1797 | 1921 | return env->cp15.c2_control; |
9ee6e8bb PB |
1922 | default: |
1923 | goto bad_reg; | |
1924 | } | |
1925 | } | |
ce819861 | 1926 | case 3: /* MMU Domain access control / MPU write buffer control. */ |
b5ff1b31 FB |
1927 | return env->cp15.c3; |
1928 | case 4: /* Reserved. */ | |
1929 | goto bad_reg; | |
ce819861 | 1930 | case 5: /* MMU Fault status / MPU access permission. */ |
c3d2689d AZ |
1931 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) |
1932 | op2 = 0; | |
b5ff1b31 FB |
1933 | switch (op2) { |
1934 | case 0: | |
ce819861 PB |
1935 | if (arm_feature(env, ARM_FEATURE_MPU)) |
1936 | return simple_mpu_ap_bits(env->cp15.c5_data); | |
b5ff1b31 FB |
1937 | return env->cp15.c5_data; |
1938 | case 1: | |
ce819861 PB |
1939 | if (arm_feature(env, ARM_FEATURE_MPU)) |
1940 | return simple_mpu_ap_bits(env->cp15.c5_data); | |
1941 | return env->cp15.c5_insn; | |
1942 | case 2: | |
1943 | if (!arm_feature(env, ARM_FEATURE_MPU)) | |
1944 | goto bad_reg; | |
1945 | return env->cp15.c5_data; | |
1946 | case 3: | |
1947 | if (!arm_feature(env, ARM_FEATURE_MPU)) | |
1948 | goto bad_reg; | |
b5ff1b31 FB |
1949 | return env->cp15.c5_insn; |
1950 | default: | |
1951 | goto bad_reg; | |
1952 | } | |
9ee6e8bb | 1953 | case 6: /* MMU Fault address. */ |
ce819861 | 1954 | if (arm_feature(env, ARM_FEATURE_MPU)) { |
9ee6e8bb | 1955 | if (crm >= 8) |
ce819861 | 1956 | goto bad_reg; |
9ee6e8bb | 1957 | return env->cp15.c6_region[crm]; |
ce819861 | 1958 | } else { |
c3d2689d AZ |
1959 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) |
1960 | op2 = 0; | |
9ee6e8bb PB |
1961 | switch (op2) { |
1962 | case 0: | |
1963 | return env->cp15.c6_data; | |
1964 | case 1: | |
1965 | if (arm_feature(env, ARM_FEATURE_V6)) { | |
1966 | /* Watchpoint Fault Adrress. */ | |
1967 | return 0; /* Not implemented. */ | |
1968 | } else { | |
1969 | /* Instruction Fault Adrress. */ | |
1970 | /* Arm9 doesn't have an IFAR, but implementing it anyway | |
1971 | shouldn't do any harm. */ | |
1972 | return env->cp15.c6_insn; | |
1973 | } | |
1974 | case 2: | |
1975 | if (arm_feature(env, ARM_FEATURE_V6)) { | |
1976 | /* Instruction Fault Adrress. */ | |
1977 | return env->cp15.c6_insn; | |
1978 | } else { | |
1979 | goto bad_reg; | |
1980 | } | |
1981 | default: | |
1982 | goto bad_reg; | |
1983 | } | |
b5ff1b31 FB |
1984 | } |
1985 | case 7: /* Cache control. */ | |
f8bf8606 AL |
1986 | if (crm == 4 && op1 == 0 && op2 == 0) { |
1987 | return env->cp15.c7_par; | |
1988 | } | |
6fbe23d5 PB |
1989 | /* FIXME: Should only clear Z flag if destination is r15. */ |
1990 | env->ZF = 0; | |
b5ff1b31 FB |
1991 | return 0; |
1992 | case 8: /* MMU TLB control. */ | |
1993 | goto bad_reg; | |
74594c9d PM |
1994 | case 9: |
1995 | switch (crm) { | |
1996 | case 0: /* Cache lockdown */ | |
1997 | switch (op1) { | |
1998 | case 0: /* L1 cache. */ | |
1999 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) { | |
2000 | return 0; | |
2001 | } | |
2002 | switch (op2) { | |
2003 | case 0: | |
2004 | return env->cp15.c9_data; | |
2005 | case 1: | |
2006 | return env->cp15.c9_insn; | |
2007 | default: | |
2008 | goto bad_reg; | |
2009 | } | |
2010 | case 1: /* L2 cache */ | |
2011 | if (crm != 0) { | |
2012 | goto bad_reg; | |
2013 | } | |
2014 | /* L2 Lockdown and Auxiliary control. */ | |
2015 | return 0; | |
2016 | default: | |
2017 | goto bad_reg; | |
2018 | } | |
2019 | break; | |
2020 | case 12: /* Performance monitor control */ | |
2021 | if (!arm_feature(env, ARM_FEATURE_V7)) { | |
2022 | goto bad_reg; | |
2023 | } | |
9ee6e8bb | 2024 | switch (op2) { |
74594c9d PM |
2025 | case 0: /* performance monitor control register */ |
2026 | return env->cp15.c9_pmcr; | |
2027 | case 1: /* count enable set */ | |
2028 | case 2: /* count enable clear */ | |
2029 | return env->cp15.c9_pmcnten; | |
2030 | case 3: /* overflow flag status */ | |
2031 | return env->cp15.c9_pmovsr; | |
2032 | case 4: /* software increment */ | |
2033 | case 5: /* event counter selection register */ | |
2034 | return 0; /* Unimplemented, RAZ/WI */ | |
9ee6e8bb PB |
2035 | default: |
2036 | goto bad_reg; | |
2037 | } | |
74594c9d PM |
2038 | case 13: /* Performance counters */ |
2039 | if (!arm_feature(env, ARM_FEATURE_V7)) { | |
2040 | goto bad_reg; | |
2041 | } | |
2042 | switch (op2) { | |
2043 | case 1: /* Event type select */ | |
2044 | return env->cp15.c9_pmxevtyper; | |
2045 | case 0: /* Cycle count register */ | |
2046 | case 2: /* Event count register */ | |
2047 | /* Unimplemented, so RAZ/WI */ | |
2048 | return 0; | |
2049 | default: | |
9ee6e8bb | 2050 | goto bad_reg; |
74594c9d PM |
2051 | } |
2052 | case 14: /* Performance monitor control */ | |
2053 | if (!arm_feature(env, ARM_FEATURE_V7)) { | |
2054 | goto bad_reg; | |
2055 | } | |
2056 | switch (op2) { | |
2057 | case 0: /* user enable */ | |
2058 | return env->cp15.c9_pmuserenr; | |
2059 | case 1: /* interrupt enable set */ | |
2060 | case 2: /* interrupt enable clear */ | |
2061 | return env->cp15.c9_pminten; | |
2062 | default: | |
2063 | goto bad_reg; | |
2064 | } | |
b5ff1b31 FB |
2065 | default: |
2066 | goto bad_reg; | |
2067 | } | |
74594c9d | 2068 | break; |
b5ff1b31 FB |
2069 | case 10: /* MMU TLB lockdown. */ |
2070 | /* ??? TLB lockdown not implemented. */ | |
2071 | return 0; | |
2072 | case 11: /* TCM DMA control. */ | |
2073 | case 12: /* Reserved. */ | |
2074 | goto bad_reg; | |
2075 | case 13: /* Process ID. */ | |
2076 | switch (op2) { | |
2077 | case 0: | |
2078 | return env->cp15.c13_fcse; | |
2079 | case 1: | |
2080 | return env->cp15.c13_context; | |
2081 | default: | |
2082 | goto bad_reg; | |
2083 | } | |
2084 | case 14: /* Reserved. */ | |
2085 | goto bad_reg; | |
2086 | case 15: /* Implementation specific. */ | |
c1713132 | 2087 | if (arm_feature(env, ARM_FEATURE_XSCALE)) { |
c3d2689d | 2088 | if (op2 == 0 && crm == 1) |
c1713132 AZ |
2089 | return env->cp15.c15_cpar; |
2090 | ||
2091 | goto bad_reg; | |
2092 | } | |
c3d2689d AZ |
2093 | if (arm_feature(env, ARM_FEATURE_OMAPCP)) { |
2094 | switch (crm) { | |
2095 | case 0: | |
2096 | return 0; | |
2097 | case 1: /* Read TI925T configuration. */ | |
2098 | return env->cp15.c15_ticonfig; | |
2099 | case 2: /* Read I_max. */ | |
2100 | return env->cp15.c15_i_max; | |
2101 | case 3: /* Read I_min. */ | |
2102 | return env->cp15.c15_i_min; | |
2103 | case 4: /* Read thread-ID. */ | |
2104 | return env->cp15.c15_threadid; | |
2105 | case 8: /* TI925T_status */ | |
2106 | return 0; | |
2107 | } | |
827df9f3 AZ |
2108 | /* TODO: Peripheral port remap register: |
2109 | * On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt | |
2110 | * controller base address at $rn & ~0xfff and map size of | |
2111 | * 0x200 << ($rn & 0xfff), when MMU is off. */ | |
c3d2689d AZ |
2112 | goto bad_reg; |
2113 | } | |
b5ff1b31 FB |
2114 | return 0; |
2115 | } | |
2116 | bad_reg: | |
2117 | /* ??? For debugging only. Should raise illegal instruction exception. */ | |
9ee6e8bb PB |
2118 | cpu_abort(env, "Unimplemented cp15 register read (c%d, c%d, {%d, %d})\n", |
2119 | (insn >> 16) & 0xf, crm, op1, op2); | |
b5ff1b31 FB |
2120 | return 0; |
2121 | } | |
2122 | ||
b0109805 | 2123 | void HELPER(set_r13_banked)(CPUState *env, uint32_t mode, uint32_t val) |
9ee6e8bb | 2124 | { |
39ea3d4e PM |
2125 | if ((env->uncached_cpsr & CPSR_M) == mode) { |
2126 | env->regs[13] = val; | |
2127 | } else { | |
2128 | env->banked_r13[bank_number(mode)] = val; | |
2129 | } | |
9ee6e8bb PB |
2130 | } |
2131 | ||
b0109805 | 2132 | uint32_t HELPER(get_r13_banked)(CPUState *env, uint32_t mode) |
9ee6e8bb | 2133 | { |
39ea3d4e PM |
2134 | if ((env->uncached_cpsr & CPSR_M) == mode) { |
2135 | return env->regs[13]; | |
2136 | } else { | |
2137 | return env->banked_r13[bank_number(mode)]; | |
2138 | } | |
9ee6e8bb PB |
2139 | } |
2140 | ||
8984bd2e | 2141 | uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg) |
9ee6e8bb PB |
2142 | { |
2143 | switch (reg) { | |
2144 | case 0: /* APSR */ | |
2145 | return xpsr_read(env) & 0xf8000000; | |
2146 | case 1: /* IAPSR */ | |
2147 | return xpsr_read(env) & 0xf80001ff; | |
2148 | case 2: /* EAPSR */ | |
2149 | return xpsr_read(env) & 0xff00fc00; | |
2150 | case 3: /* xPSR */ | |
2151 | return xpsr_read(env) & 0xff00fdff; | |
2152 | case 5: /* IPSR */ | |
2153 | return xpsr_read(env) & 0x000001ff; | |
2154 | case 6: /* EPSR */ | |
2155 | return xpsr_read(env) & 0x0700fc00; | |
2156 | case 7: /* IEPSR */ | |
2157 | return xpsr_read(env) & 0x0700edff; | |
2158 | case 8: /* MSP */ | |
2159 | return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13]; | |
2160 | case 9: /* PSP */ | |
2161 | return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp; | |
2162 | case 16: /* PRIMASK */ | |
2163 | return (env->uncached_cpsr & CPSR_I) != 0; | |
82845826 SH |
2164 | case 17: /* BASEPRI */ |
2165 | case 18: /* BASEPRI_MAX */ | |
9ee6e8bb | 2166 | return env->v7m.basepri; |
82845826 SH |
2167 | case 19: /* FAULTMASK */ |
2168 | return (env->uncached_cpsr & CPSR_F) != 0; | |
9ee6e8bb PB |
2169 | case 20: /* CONTROL */ |
2170 | return env->v7m.control; | |
2171 | default: | |
2172 | /* ??? For debugging only. */ | |
2173 | cpu_abort(env, "Unimplemented system register read (%d)\n", reg); | |
2174 | return 0; | |
2175 | } | |
2176 | } | |
2177 | ||
8984bd2e | 2178 | void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val) |
9ee6e8bb PB |
2179 | { |
2180 | switch (reg) { | |
2181 | case 0: /* APSR */ | |
2182 | xpsr_write(env, val, 0xf8000000); | |
2183 | break; | |
2184 | case 1: /* IAPSR */ | |
2185 | xpsr_write(env, val, 0xf8000000); | |
2186 | break; | |
2187 | case 2: /* EAPSR */ | |
2188 | xpsr_write(env, val, 0xfe00fc00); | |
2189 | break; | |
2190 | case 3: /* xPSR */ | |
2191 | xpsr_write(env, val, 0xfe00fc00); | |
2192 | break; | |
2193 | case 5: /* IPSR */ | |
2194 | /* IPSR bits are readonly. */ | |
2195 | break; | |
2196 | case 6: /* EPSR */ | |
2197 | xpsr_write(env, val, 0x0600fc00); | |
2198 | break; | |
2199 | case 7: /* IEPSR */ | |
2200 | xpsr_write(env, val, 0x0600fc00); | |
2201 | break; | |
2202 | case 8: /* MSP */ | |
2203 | if (env->v7m.current_sp) | |
2204 | env->v7m.other_sp = val; | |
2205 | else | |
2206 | env->regs[13] = val; | |
2207 | break; | |
2208 | case 9: /* PSP */ | |
2209 | if (env->v7m.current_sp) | |
2210 | env->regs[13] = val; | |
2211 | else | |
2212 | env->v7m.other_sp = val; | |
2213 | break; | |
2214 | case 16: /* PRIMASK */ | |
2215 | if (val & 1) | |
2216 | env->uncached_cpsr |= CPSR_I; | |
2217 | else | |
2218 | env->uncached_cpsr &= ~CPSR_I; | |
2219 | break; | |
82845826 | 2220 | case 17: /* BASEPRI */ |
9ee6e8bb PB |
2221 | env->v7m.basepri = val & 0xff; |
2222 | break; | |
82845826 | 2223 | case 18: /* BASEPRI_MAX */ |
9ee6e8bb PB |
2224 | val &= 0xff; |
2225 | if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0)) | |
2226 | env->v7m.basepri = val; | |
2227 | break; | |
82845826 SH |
2228 | case 19: /* FAULTMASK */ |
2229 | if (val & 1) | |
2230 | env->uncached_cpsr |= CPSR_F; | |
2231 | else | |
2232 | env->uncached_cpsr &= ~CPSR_F; | |
2233 | break; | |
9ee6e8bb PB |
2234 | case 20: /* CONTROL */ |
2235 | env->v7m.control = val & 3; | |
2236 | switch_v7m_sp(env, (val & 2) != 0); | |
2237 | break; | |
2238 | default: | |
2239 | /* ??? For debugging only. */ | |
2240 | cpu_abort(env, "Unimplemented system register write (%d)\n", reg); | |
2241 | return; | |
2242 | } | |
2243 | } | |
2244 | ||
c1713132 AZ |
2245 | void cpu_arm_set_cp_io(CPUARMState *env, int cpnum, |
2246 | ARMReadCPFunc *cp_read, ARMWriteCPFunc *cp_write, | |
2247 | void *opaque) | |
2248 | { | |
2249 | if (cpnum < 0 || cpnum > 14) { | |
2250 | cpu_abort(env, "Bad coprocessor number: %i\n", cpnum); | |
2251 | return; | |
2252 | } | |
2253 | ||
2254 | env->cp[cpnum].cp_read = cp_read; | |
2255 | env->cp[cpnum].cp_write = cp_write; | |
2256 | env->cp[cpnum].opaque = opaque; | |
2257 | } | |
2258 | ||
b5ff1b31 | 2259 | #endif |
6ddbc6e4 PB |
2260 | |
2261 | /* Note that signed overflow is undefined in C. The following routines are | |
2262 | careful to use unsigned types where modulo arithmetic is required. | |
2263 | Failure to do so _will_ break on newer gcc. */ | |
2264 | ||
2265 | /* Signed saturating arithmetic. */ | |
2266 | ||
1654b2d6 | 2267 | /* Perform 16-bit signed saturating addition. */ |
6ddbc6e4 PB |
2268 | static inline uint16_t add16_sat(uint16_t a, uint16_t b) |
2269 | { | |
2270 | uint16_t res; | |
2271 | ||
2272 | res = a + b; | |
2273 | if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) { | |
2274 | if (a & 0x8000) | |
2275 | res = 0x8000; | |
2276 | else | |
2277 | res = 0x7fff; | |
2278 | } | |
2279 | return res; | |
2280 | } | |
2281 | ||
1654b2d6 | 2282 | /* Perform 8-bit signed saturating addition. */ |
6ddbc6e4 PB |
2283 | static inline uint8_t add8_sat(uint8_t a, uint8_t b) |
2284 | { | |
2285 | uint8_t res; | |
2286 | ||
2287 | res = a + b; | |
2288 | if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) { | |
2289 | if (a & 0x80) | |
2290 | res = 0x80; | |
2291 | else | |
2292 | res = 0x7f; | |
2293 | } | |
2294 | return res; | |
2295 | } | |
2296 | ||
1654b2d6 | 2297 | /* Perform 16-bit signed saturating subtraction. */ |
6ddbc6e4 PB |
2298 | static inline uint16_t sub16_sat(uint16_t a, uint16_t b) |
2299 | { | |
2300 | uint16_t res; | |
2301 | ||
2302 | res = a - b; | |
2303 | if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) { | |
2304 | if (a & 0x8000) | |
2305 | res = 0x8000; | |
2306 | else | |
2307 | res = 0x7fff; | |
2308 | } | |
2309 | return res; | |
2310 | } | |
2311 | ||
1654b2d6 | 2312 | /* Perform 8-bit signed saturating subtraction. */ |
6ddbc6e4 PB |
2313 | static inline uint8_t sub8_sat(uint8_t a, uint8_t b) |
2314 | { | |
2315 | uint8_t res; | |
2316 | ||
2317 | res = a - b; | |
2318 | if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) { | |
2319 | if (a & 0x80) | |
2320 | res = 0x80; | |
2321 | else | |
2322 | res = 0x7f; | |
2323 | } | |
2324 | return res; | |
2325 | } | |
2326 | ||
2327 | #define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16); | |
2328 | #define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16); | |
2329 | #define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8); | |
2330 | #define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8); | |
2331 | #define PFX q | |
2332 | ||
2333 | #include "op_addsub.h" | |
2334 | ||
2335 | /* Unsigned saturating arithmetic. */ | |
460a09c1 | 2336 | static inline uint16_t add16_usat(uint16_t a, uint16_t b) |
6ddbc6e4 PB |
2337 | { |
2338 | uint16_t res; | |
2339 | res = a + b; | |
2340 | if (res < a) | |
2341 | res = 0xffff; | |
2342 | return res; | |
2343 | } | |
2344 | ||
460a09c1 | 2345 | static inline uint16_t sub16_usat(uint16_t a, uint16_t b) |
6ddbc6e4 | 2346 | { |
4c4fd3f8 | 2347 | if (a > b) |
6ddbc6e4 PB |
2348 | return a - b; |
2349 | else | |
2350 | return 0; | |
2351 | } | |
2352 | ||
2353 | static inline uint8_t add8_usat(uint8_t a, uint8_t b) | |
2354 | { | |
2355 | uint8_t res; | |
2356 | res = a + b; | |
2357 | if (res < a) | |
2358 | res = 0xff; | |
2359 | return res; | |
2360 | } | |
2361 | ||
2362 | static inline uint8_t sub8_usat(uint8_t a, uint8_t b) | |
2363 | { | |
4c4fd3f8 | 2364 | if (a > b) |
6ddbc6e4 PB |
2365 | return a - b; |
2366 | else | |
2367 | return 0; | |
2368 | } | |
2369 | ||
2370 | #define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16); | |
2371 | #define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16); | |
2372 | #define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8); | |
2373 | #define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8); | |
2374 | #define PFX uq | |
2375 | ||
2376 | #include "op_addsub.h" | |
2377 | ||
2378 | /* Signed modulo arithmetic. */ | |
2379 | #define SARITH16(a, b, n, op) do { \ | |
2380 | int32_t sum; \ | |
db6e2e65 | 2381 | sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \ |
6ddbc6e4 PB |
2382 | RESULT(sum, n, 16); \ |
2383 | if (sum >= 0) \ | |
2384 | ge |= 3 << (n * 2); \ | |
2385 | } while(0) | |
2386 | ||
2387 | #define SARITH8(a, b, n, op) do { \ | |
2388 | int32_t sum; \ | |
db6e2e65 | 2389 | sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \ |
6ddbc6e4 PB |
2390 | RESULT(sum, n, 8); \ |
2391 | if (sum >= 0) \ | |
2392 | ge |= 1 << n; \ | |
2393 | } while(0) | |
2394 | ||
2395 | ||
2396 | #define ADD16(a, b, n) SARITH16(a, b, n, +) | |
2397 | #define SUB16(a, b, n) SARITH16(a, b, n, -) | |
2398 | #define ADD8(a, b, n) SARITH8(a, b, n, +) | |
2399 | #define SUB8(a, b, n) SARITH8(a, b, n, -) | |
2400 | #define PFX s | |
2401 | #define ARITH_GE | |
2402 | ||
2403 | #include "op_addsub.h" | |
2404 | ||
2405 | /* Unsigned modulo arithmetic. */ | |
2406 | #define ADD16(a, b, n) do { \ | |
2407 | uint32_t sum; \ | |
2408 | sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \ | |
2409 | RESULT(sum, n, 16); \ | |
a87aa10b | 2410 | if ((sum >> 16) == 1) \ |
6ddbc6e4 PB |
2411 | ge |= 3 << (n * 2); \ |
2412 | } while(0) | |
2413 | ||
2414 | #define ADD8(a, b, n) do { \ | |
2415 | uint32_t sum; \ | |
2416 | sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \ | |
2417 | RESULT(sum, n, 8); \ | |
a87aa10b AZ |
2418 | if ((sum >> 8) == 1) \ |
2419 | ge |= 1 << n; \ | |
6ddbc6e4 PB |
2420 | } while(0) |
2421 | ||
2422 | #define SUB16(a, b, n) do { \ | |
2423 | uint32_t sum; \ | |
2424 | sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \ | |
2425 | RESULT(sum, n, 16); \ | |
2426 | if ((sum >> 16) == 0) \ | |
2427 | ge |= 3 << (n * 2); \ | |
2428 | } while(0) | |
2429 | ||
2430 | #define SUB8(a, b, n) do { \ | |
2431 | uint32_t sum; \ | |
2432 | sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \ | |
2433 | RESULT(sum, n, 8); \ | |
2434 | if ((sum >> 8) == 0) \ | |
a87aa10b | 2435 | ge |= 1 << n; \ |
6ddbc6e4 PB |
2436 | } while(0) |
2437 | ||
2438 | #define PFX u | |
2439 | #define ARITH_GE | |
2440 | ||
2441 | #include "op_addsub.h" | |
2442 | ||
2443 | /* Halved signed arithmetic. */ | |
2444 | #define ADD16(a, b, n) \ | |
2445 | RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16) | |
2446 | #define SUB16(a, b, n) \ | |
2447 | RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16) | |
2448 | #define ADD8(a, b, n) \ | |
2449 | RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8) | |
2450 | #define SUB8(a, b, n) \ | |
2451 | RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8) | |
2452 | #define PFX sh | |
2453 | ||
2454 | #include "op_addsub.h" | |
2455 | ||
2456 | /* Halved unsigned arithmetic. */ | |
2457 | #define ADD16(a, b, n) \ | |
2458 | RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16) | |
2459 | #define SUB16(a, b, n) \ | |
2460 | RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16) | |
2461 | #define ADD8(a, b, n) \ | |
2462 | RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8) | |
2463 | #define SUB8(a, b, n) \ | |
2464 | RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8) | |
2465 | #define PFX uh | |
2466 | ||
2467 | #include "op_addsub.h" | |
2468 | ||
2469 | static inline uint8_t do_usad(uint8_t a, uint8_t b) | |
2470 | { | |
2471 | if (a > b) | |
2472 | return a - b; | |
2473 | else | |
2474 | return b - a; | |
2475 | } | |
2476 | ||
2477 | /* Unsigned sum of absolute byte differences. */ | |
2478 | uint32_t HELPER(usad8)(uint32_t a, uint32_t b) | |
2479 | { | |
2480 | uint32_t sum; | |
2481 | sum = do_usad(a, b); | |
2482 | sum += do_usad(a >> 8, b >> 8); | |
2483 | sum += do_usad(a >> 16, b >>16); | |
2484 | sum += do_usad(a >> 24, b >> 24); | |
2485 | return sum; | |
2486 | } | |
2487 | ||
2488 | /* For ARMv6 SEL instruction. */ | |
2489 | uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b) | |
2490 | { | |
2491 | uint32_t mask; | |
2492 | ||
2493 | mask = 0; | |
2494 | if (flags & 1) | |
2495 | mask |= 0xff; | |
2496 | if (flags & 2) | |
2497 | mask |= 0xff00; | |
2498 | if (flags & 4) | |
2499 | mask |= 0xff0000; | |
2500 | if (flags & 8) | |
2501 | mask |= 0xff000000; | |
2502 | return (a & mask) | (b & ~mask); | |
2503 | } | |
2504 | ||
5e3f878a PB |
2505 | uint32_t HELPER(logicq_cc)(uint64_t val) |
2506 | { | |
2507 | return (val >> 32) | (val != 0); | |
2508 | } | |
4373f3ce PB |
2509 | |
2510 | /* VFP support. We follow the convention used for VFP instrunctions: | |
2511 | Single precition routines have a "s" suffix, double precision a | |
2512 | "d" suffix. */ | |
2513 | ||
2514 | /* Convert host exception flags to vfp form. */ | |
2515 | static inline int vfp_exceptbits_from_host(int host_bits) | |
2516 | { | |
2517 | int target_bits = 0; | |
2518 | ||
2519 | if (host_bits & float_flag_invalid) | |
2520 | target_bits |= 1; | |
2521 | if (host_bits & float_flag_divbyzero) | |
2522 | target_bits |= 2; | |
2523 | if (host_bits & float_flag_overflow) | |
2524 | target_bits |= 4; | |
36802b6b | 2525 | if (host_bits & (float_flag_underflow | float_flag_output_denormal)) |
4373f3ce PB |
2526 | target_bits |= 8; |
2527 | if (host_bits & float_flag_inexact) | |
2528 | target_bits |= 0x10; | |
cecd8504 PM |
2529 | if (host_bits & float_flag_input_denormal) |
2530 | target_bits |= 0x80; | |
4373f3ce PB |
2531 | return target_bits; |
2532 | } | |
2533 | ||
2534 | uint32_t HELPER(vfp_get_fpscr)(CPUState *env) | |
2535 | { | |
2536 | int i; | |
2537 | uint32_t fpscr; | |
2538 | ||
2539 | fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff) | |
2540 | | (env->vfp.vec_len << 16) | |
2541 | | (env->vfp.vec_stride << 20); | |
2542 | i = get_float_exception_flags(&env->vfp.fp_status); | |
3a492f3a | 2543 | i |= get_float_exception_flags(&env->vfp.standard_fp_status); |
4373f3ce PB |
2544 | fpscr |= vfp_exceptbits_from_host(i); |
2545 | return fpscr; | |
2546 | } | |
2547 | ||
01653295 PM |
2548 | uint32_t vfp_get_fpscr(CPUState *env) |
2549 | { | |
2550 | return HELPER(vfp_get_fpscr)(env); | |
2551 | } | |
2552 | ||
4373f3ce PB |
2553 | /* Convert vfp exception flags to target form. */ |
2554 | static inline int vfp_exceptbits_to_host(int target_bits) | |
2555 | { | |
2556 | int host_bits = 0; | |
2557 | ||
2558 | if (target_bits & 1) | |
2559 | host_bits |= float_flag_invalid; | |
2560 | if (target_bits & 2) | |
2561 | host_bits |= float_flag_divbyzero; | |
2562 | if (target_bits & 4) | |
2563 | host_bits |= float_flag_overflow; | |
2564 | if (target_bits & 8) | |
2565 | host_bits |= float_flag_underflow; | |
2566 | if (target_bits & 0x10) | |
2567 | host_bits |= float_flag_inexact; | |
cecd8504 PM |
2568 | if (target_bits & 0x80) |
2569 | host_bits |= float_flag_input_denormal; | |
4373f3ce PB |
2570 | return host_bits; |
2571 | } | |
2572 | ||
2573 | void HELPER(vfp_set_fpscr)(CPUState *env, uint32_t val) | |
2574 | { | |
2575 | int i; | |
2576 | uint32_t changed; | |
2577 | ||
2578 | changed = env->vfp.xregs[ARM_VFP_FPSCR]; | |
2579 | env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff); | |
2580 | env->vfp.vec_len = (val >> 16) & 7; | |
2581 | env->vfp.vec_stride = (val >> 20) & 3; | |
2582 | ||
2583 | changed ^= val; | |
2584 | if (changed & (3 << 22)) { | |
2585 | i = (val >> 22) & 3; | |
2586 | switch (i) { | |
2587 | case 0: | |
2588 | i = float_round_nearest_even; | |
2589 | break; | |
2590 | case 1: | |
2591 | i = float_round_up; | |
2592 | break; | |
2593 | case 2: | |
2594 | i = float_round_down; | |
2595 | break; | |
2596 | case 3: | |
2597 | i = float_round_to_zero; | |
2598 | break; | |
2599 | } | |
2600 | set_float_rounding_mode(i, &env->vfp.fp_status); | |
2601 | } | |
cecd8504 | 2602 | if (changed & (1 << 24)) { |
fe76d976 | 2603 | set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); |
cecd8504 PM |
2604 | set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); |
2605 | } | |
5c7908ed PB |
2606 | if (changed & (1 << 25)) |
2607 | set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status); | |
4373f3ce | 2608 | |
b12c390b | 2609 | i = vfp_exceptbits_to_host(val); |
4373f3ce | 2610 | set_float_exception_flags(i, &env->vfp.fp_status); |
3a492f3a | 2611 | set_float_exception_flags(0, &env->vfp.standard_fp_status); |
4373f3ce PB |
2612 | } |
2613 | ||
01653295 PM |
2614 | void vfp_set_fpscr(CPUState *env, uint32_t val) |
2615 | { | |
2616 | HELPER(vfp_set_fpscr)(env, val); | |
2617 | } | |
2618 | ||
4373f3ce PB |
2619 | #define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p)) |
2620 | ||
2621 | #define VFP_BINOP(name) \ | |
ae1857ec | 2622 | float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \ |
4373f3ce | 2623 | { \ |
ae1857ec PM |
2624 | float_status *fpst = fpstp; \ |
2625 | return float32_ ## name(a, b, fpst); \ | |
4373f3ce | 2626 | } \ |
ae1857ec | 2627 | float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \ |
4373f3ce | 2628 | { \ |
ae1857ec PM |
2629 | float_status *fpst = fpstp; \ |
2630 | return float64_ ## name(a, b, fpst); \ | |
4373f3ce PB |
2631 | } |
2632 | VFP_BINOP(add) | |
2633 | VFP_BINOP(sub) | |
2634 | VFP_BINOP(mul) | |
2635 | VFP_BINOP(div) | |
2636 | #undef VFP_BINOP | |
2637 | ||
2638 | float32 VFP_HELPER(neg, s)(float32 a) | |
2639 | { | |
2640 | return float32_chs(a); | |
2641 | } | |
2642 | ||
2643 | float64 VFP_HELPER(neg, d)(float64 a) | |
2644 | { | |
66230e0d | 2645 | return float64_chs(a); |
4373f3ce PB |
2646 | } |
2647 | ||
2648 | float32 VFP_HELPER(abs, s)(float32 a) | |
2649 | { | |
2650 | return float32_abs(a); | |
2651 | } | |
2652 | ||
2653 | float64 VFP_HELPER(abs, d)(float64 a) | |
2654 | { | |
66230e0d | 2655 | return float64_abs(a); |
4373f3ce PB |
2656 | } |
2657 | ||
2658 | float32 VFP_HELPER(sqrt, s)(float32 a, CPUState *env) | |
2659 | { | |
2660 | return float32_sqrt(a, &env->vfp.fp_status); | |
2661 | } | |
2662 | ||
2663 | float64 VFP_HELPER(sqrt, d)(float64 a, CPUState *env) | |
2664 | { | |
2665 | return float64_sqrt(a, &env->vfp.fp_status); | |
2666 | } | |
2667 | ||
2668 | /* XXX: check quiet/signaling case */ | |
2669 | #define DO_VFP_cmp(p, type) \ | |
2670 | void VFP_HELPER(cmp, p)(type a, type b, CPUState *env) \ | |
2671 | { \ | |
2672 | uint32_t flags; \ | |
2673 | switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \ | |
2674 | case 0: flags = 0x6; break; \ | |
2675 | case -1: flags = 0x8; break; \ | |
2676 | case 1: flags = 0x2; break; \ | |
2677 | default: case 2: flags = 0x3; break; \ | |
2678 | } \ | |
2679 | env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \ | |
2680 | | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \ | |
2681 | } \ | |
2682 | void VFP_HELPER(cmpe, p)(type a, type b, CPUState *env) \ | |
2683 | { \ | |
2684 | uint32_t flags; \ | |
2685 | switch(type ## _compare(a, b, &env->vfp.fp_status)) { \ | |
2686 | case 0: flags = 0x6; break; \ | |
2687 | case -1: flags = 0x8; break; \ | |
2688 | case 1: flags = 0x2; break; \ | |
2689 | default: case 2: flags = 0x3; break; \ | |
2690 | } \ | |
2691 | env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \ | |
2692 | | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \ | |
2693 | } | |
2694 | DO_VFP_cmp(s, float32) | |
2695 | DO_VFP_cmp(d, float64) | |
2696 | #undef DO_VFP_cmp | |
2697 | ||
5500b06c | 2698 | /* Integer to float and float to integer conversions */ |
4373f3ce | 2699 | |
5500b06c PM |
2700 | #define CONV_ITOF(name, fsz, sign) \ |
2701 | float##fsz HELPER(name)(uint32_t x, void *fpstp) \ | |
2702 | { \ | |
2703 | float_status *fpst = fpstp; \ | |
2704 | return sign##int32_to_##float##fsz(x, fpst); \ | |
4373f3ce PB |
2705 | } |
2706 | ||
5500b06c PM |
2707 | #define CONV_FTOI(name, fsz, sign, round) \ |
2708 | uint32_t HELPER(name)(float##fsz x, void *fpstp) \ | |
2709 | { \ | |
2710 | float_status *fpst = fpstp; \ | |
2711 | if (float##fsz##_is_any_nan(x)) { \ | |
2712 | float_raise(float_flag_invalid, fpst); \ | |
2713 | return 0; \ | |
2714 | } \ | |
2715 | return float##fsz##_to_##sign##int32##round(x, fpst); \ | |
4373f3ce PB |
2716 | } |
2717 | ||
5500b06c PM |
2718 | #define FLOAT_CONVS(name, p, fsz, sign) \ |
2719 | CONV_ITOF(vfp_##name##to##p, fsz, sign) \ | |
2720 | CONV_FTOI(vfp_to##name##p, fsz, sign, ) \ | |
2721 | CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero) | |
4373f3ce | 2722 | |
5500b06c PM |
2723 | FLOAT_CONVS(si, s, 32, ) |
2724 | FLOAT_CONVS(si, d, 64, ) | |
2725 | FLOAT_CONVS(ui, s, 32, u) | |
2726 | FLOAT_CONVS(ui, d, 64, u) | |
4373f3ce | 2727 | |
5500b06c PM |
2728 | #undef CONV_ITOF |
2729 | #undef CONV_FTOI | |
2730 | #undef FLOAT_CONVS | |
4373f3ce PB |
2731 | |
2732 | /* floating point conversion */ | |
2733 | float64 VFP_HELPER(fcvtd, s)(float32 x, CPUState *env) | |
2734 | { | |
2d627737 PM |
2735 | float64 r = float32_to_float64(x, &env->vfp.fp_status); |
2736 | /* ARM requires that S<->D conversion of any kind of NaN generates | |
2737 | * a quiet NaN by forcing the most significant frac bit to 1. | |
2738 | */ | |
2739 | return float64_maybe_silence_nan(r); | |
4373f3ce PB |
2740 | } |
2741 | ||
2742 | float32 VFP_HELPER(fcvts, d)(float64 x, CPUState *env) | |
2743 | { | |
2d627737 PM |
2744 | float32 r = float64_to_float32(x, &env->vfp.fp_status); |
2745 | /* ARM requires that S<->D conversion of any kind of NaN generates | |
2746 | * a quiet NaN by forcing the most significant frac bit to 1. | |
2747 | */ | |
2748 | return float32_maybe_silence_nan(r); | |
4373f3ce PB |
2749 | } |
2750 | ||
2751 | /* VFP3 fixed point conversion. */ | |
622465e1 | 2752 | #define VFP_CONV_FIX(name, p, fsz, itype, sign) \ |
5500b06c PM |
2753 | float##fsz HELPER(vfp_##name##to##p)(uint##fsz##_t x, uint32_t shift, \ |
2754 | void *fpstp) \ | |
4373f3ce | 2755 | { \ |
5500b06c | 2756 | float_status *fpst = fpstp; \ |
622465e1 | 2757 | float##fsz tmp; \ |
5500b06c PM |
2758 | tmp = sign##int32_to_##float##fsz((itype##_t)x, fpst); \ |
2759 | return float##fsz##_scalbn(tmp, -(int)shift, fpst); \ | |
4373f3ce | 2760 | } \ |
5500b06c PM |
2761 | uint##fsz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \ |
2762 | void *fpstp) \ | |
4373f3ce | 2763 | { \ |
5500b06c | 2764 | float_status *fpst = fpstp; \ |
622465e1 PM |
2765 | float##fsz tmp; \ |
2766 | if (float##fsz##_is_any_nan(x)) { \ | |
5500b06c | 2767 | float_raise(float_flag_invalid, fpst); \ |
622465e1 | 2768 | return 0; \ |
09d9487f | 2769 | } \ |
5500b06c PM |
2770 | tmp = float##fsz##_scalbn(x, shift, fpst); \ |
2771 | return float##fsz##_to_##itype##_round_to_zero(tmp, fpst); \ | |
622465e1 PM |
2772 | } |
2773 | ||
2774 | VFP_CONV_FIX(sh, d, 64, int16, ) | |
2775 | VFP_CONV_FIX(sl, d, 64, int32, ) | |
2776 | VFP_CONV_FIX(uh, d, 64, uint16, u) | |
2777 | VFP_CONV_FIX(ul, d, 64, uint32, u) | |
2778 | VFP_CONV_FIX(sh, s, 32, int16, ) | |
2779 | VFP_CONV_FIX(sl, s, 32, int32, ) | |
2780 | VFP_CONV_FIX(uh, s, 32, uint16, u) | |
2781 | VFP_CONV_FIX(ul, s, 32, uint32, u) | |
4373f3ce PB |
2782 | #undef VFP_CONV_FIX |
2783 | ||
60011498 | 2784 | /* Half precision conversions. */ |
2d981da7 | 2785 | static float32 do_fcvt_f16_to_f32(uint32_t a, CPUState *env, float_status *s) |
60011498 | 2786 | { |
60011498 | 2787 | int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; |
fb91678d PM |
2788 | float32 r = float16_to_float32(make_float16(a), ieee, s); |
2789 | if (ieee) { | |
2790 | return float32_maybe_silence_nan(r); | |
2791 | } | |
2792 | return r; | |
60011498 PB |
2793 | } |
2794 | ||
2d981da7 | 2795 | static uint32_t do_fcvt_f32_to_f16(float32 a, CPUState *env, float_status *s) |
60011498 | 2796 | { |
60011498 | 2797 | int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; |
fb91678d PM |
2798 | float16 r = float32_to_float16(a, ieee, s); |
2799 | if (ieee) { | |
2800 | r = float16_maybe_silence_nan(r); | |
2801 | } | |
2802 | return float16_val(r); | |
60011498 PB |
2803 | } |
2804 | ||
2d981da7 PM |
2805 | float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUState *env) |
2806 | { | |
2807 | return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status); | |
2808 | } | |
2809 | ||
2810 | uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUState *env) | |
2811 | { | |
2812 | return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status); | |
2813 | } | |
2814 | ||
2815 | float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUState *env) | |
2816 | { | |
2817 | return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status); | |
2818 | } | |
2819 | ||
2820 | uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUState *env) | |
2821 | { | |
2822 | return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status); | |
2823 | } | |
2824 | ||
dda3ec49 | 2825 | #define float32_two make_float32(0x40000000) |
6aae3df1 PM |
2826 | #define float32_three make_float32(0x40400000) |
2827 | #define float32_one_point_five make_float32(0x3fc00000) | |
dda3ec49 | 2828 | |
4373f3ce PB |
2829 | float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env) |
2830 | { | |
dda3ec49 PM |
2831 | float_status *s = &env->vfp.standard_fp_status; |
2832 | if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) || | |
2833 | (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) { | |
43fe9bdb PM |
2834 | if (!(float32_is_zero(a) || float32_is_zero(b))) { |
2835 | float_raise(float_flag_input_denormal, s); | |
2836 | } | |
dda3ec49 PM |
2837 | return float32_two; |
2838 | } | |
2839 | return float32_sub(float32_two, float32_mul(a, b, s), s); | |
4373f3ce PB |
2840 | } |
2841 | ||
2842 | float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUState *env) | |
2843 | { | |
71826966 | 2844 | float_status *s = &env->vfp.standard_fp_status; |
9ea62f57 PM |
2845 | float32 product; |
2846 | if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) || | |
2847 | (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) { | |
43fe9bdb PM |
2848 | if (!(float32_is_zero(a) || float32_is_zero(b))) { |
2849 | float_raise(float_flag_input_denormal, s); | |
2850 | } | |
6aae3df1 | 2851 | return float32_one_point_five; |
9ea62f57 | 2852 | } |
6aae3df1 PM |
2853 | product = float32_mul(a, b, s); |
2854 | return float32_div(float32_sub(float32_three, product, s), float32_two, s); | |
4373f3ce PB |
2855 | } |
2856 | ||
8f8e3aa4 PB |
2857 | /* NEON helpers. */ |
2858 | ||
56bf4fe2 CL |
2859 | /* Constants 256 and 512 are used in some helpers; we avoid relying on |
2860 | * int->float conversions at run-time. */ | |
2861 | #define float64_256 make_float64(0x4070000000000000LL) | |
2862 | #define float64_512 make_float64(0x4080000000000000LL) | |
2863 | ||
fe0e4872 CL |
2864 | /* The algorithm that must be used to calculate the estimate |
2865 | * is specified by the ARM ARM. | |
2866 | */ | |
2867 | static float64 recip_estimate(float64 a, CPUState *env) | |
2868 | { | |
1146a817 PM |
2869 | /* These calculations mustn't set any fp exception flags, |
2870 | * so we use a local copy of the fp_status. | |
2871 | */ | |
2872 | float_status dummy_status = env->vfp.standard_fp_status; | |
2873 | float_status *s = &dummy_status; | |
fe0e4872 CL |
2874 | /* q = (int)(a * 512.0) */ |
2875 | float64 q = float64_mul(float64_512, a, s); | |
2876 | int64_t q_int = float64_to_int64_round_to_zero(q, s); | |
2877 | ||
2878 | /* r = 1.0 / (((double)q + 0.5) / 512.0) */ | |
2879 | q = int64_to_float64(q_int, s); | |
2880 | q = float64_add(q, float64_half, s); | |
2881 | q = float64_div(q, float64_512, s); | |
2882 | q = float64_div(float64_one, q, s); | |
2883 | ||
2884 | /* s = (int)(256.0 * r + 0.5) */ | |
2885 | q = float64_mul(q, float64_256, s); | |
2886 | q = float64_add(q, float64_half, s); | |
2887 | q_int = float64_to_int64_round_to_zero(q, s); | |
2888 | ||
2889 | /* return (double)s / 256.0 */ | |
2890 | return float64_div(int64_to_float64(q_int, s), float64_256, s); | |
2891 | } | |
2892 | ||
4373f3ce PB |
2893 | float32 HELPER(recpe_f32)(float32 a, CPUState *env) |
2894 | { | |
fe0e4872 CL |
2895 | float_status *s = &env->vfp.standard_fp_status; |
2896 | float64 f64; | |
2897 | uint32_t val32 = float32_val(a); | |
2898 | ||
2899 | int result_exp; | |
2900 | int a_exp = (val32 & 0x7f800000) >> 23; | |
2901 | int sign = val32 & 0x80000000; | |
2902 | ||
2903 | if (float32_is_any_nan(a)) { | |
2904 | if (float32_is_signaling_nan(a)) { | |
2905 | float_raise(float_flag_invalid, s); | |
2906 | } | |
2907 | return float32_default_nan; | |
2908 | } else if (float32_is_infinity(a)) { | |
2909 | return float32_set_sign(float32_zero, float32_is_neg(a)); | |
2910 | } else if (float32_is_zero_or_denormal(a)) { | |
43fe9bdb PM |
2911 | if (!float32_is_zero(a)) { |
2912 | float_raise(float_flag_input_denormal, s); | |
2913 | } | |
fe0e4872 CL |
2914 | float_raise(float_flag_divbyzero, s); |
2915 | return float32_set_sign(float32_infinity, float32_is_neg(a)); | |
2916 | } else if (a_exp >= 253) { | |
2917 | float_raise(float_flag_underflow, s); | |
2918 | return float32_set_sign(float32_zero, float32_is_neg(a)); | |
2919 | } | |
2920 | ||
2921 | f64 = make_float64((0x3feULL << 52) | |
2922 | | ((int64_t)(val32 & 0x7fffff) << 29)); | |
2923 | ||
2924 | result_exp = 253 - a_exp; | |
2925 | ||
2926 | f64 = recip_estimate(f64, env); | |
2927 | ||
2928 | val32 = sign | |
2929 | | ((result_exp & 0xff) << 23) | |
2930 | | ((float64_val(f64) >> 29) & 0x7fffff); | |
2931 | return make_float32(val32); | |
4373f3ce PB |
2932 | } |
2933 | ||
e07be5d2 CL |
2934 | /* The algorithm that must be used to calculate the estimate |
2935 | * is specified by the ARM ARM. | |
2936 | */ | |
2937 | static float64 recip_sqrt_estimate(float64 a, CPUState *env) | |
2938 | { | |
1146a817 PM |
2939 | /* These calculations mustn't set any fp exception flags, |
2940 | * so we use a local copy of the fp_status. | |
2941 | */ | |
2942 | float_status dummy_status = env->vfp.standard_fp_status; | |
2943 | float_status *s = &dummy_status; | |
e07be5d2 CL |
2944 | float64 q; |
2945 | int64_t q_int; | |
2946 | ||
2947 | if (float64_lt(a, float64_half, s)) { | |
2948 | /* range 0.25 <= a < 0.5 */ | |
2949 | ||
2950 | /* a in units of 1/512 rounded down */ | |
2951 | /* q0 = (int)(a * 512.0); */ | |
2952 | q = float64_mul(float64_512, a, s); | |
2953 | q_int = float64_to_int64_round_to_zero(q, s); | |
2954 | ||
2955 | /* reciprocal root r */ | |
2956 | /* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */ | |
2957 | q = int64_to_float64(q_int, s); | |
2958 | q = float64_add(q, float64_half, s); | |
2959 | q = float64_div(q, float64_512, s); | |
2960 | q = float64_sqrt(q, s); | |
2961 | q = float64_div(float64_one, q, s); | |
2962 | } else { | |
2963 | /* range 0.5 <= a < 1.0 */ | |
2964 | ||
2965 | /* a in units of 1/256 rounded down */ | |
2966 | /* q1 = (int)(a * 256.0); */ | |
2967 | q = float64_mul(float64_256, a, s); | |
2968 | int64_t q_int = float64_to_int64_round_to_zero(q, s); | |
2969 | ||
2970 | /* reciprocal root r */ | |
2971 | /* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */ | |
2972 | q = int64_to_float64(q_int, s); | |
2973 | q = float64_add(q, float64_half, s); | |
2974 | q = float64_div(q, float64_256, s); | |
2975 | q = float64_sqrt(q, s); | |
2976 | q = float64_div(float64_one, q, s); | |
2977 | } | |
2978 | /* r in units of 1/256 rounded to nearest */ | |
2979 | /* s = (int)(256.0 * r + 0.5); */ | |
2980 | ||
2981 | q = float64_mul(q, float64_256,s ); | |
2982 | q = float64_add(q, float64_half, s); | |
2983 | q_int = float64_to_int64_round_to_zero(q, s); | |
2984 | ||
2985 | /* return (double)s / 256.0;*/ | |
2986 | return float64_div(int64_to_float64(q_int, s), float64_256, s); | |
2987 | } | |
2988 | ||
4373f3ce PB |
2989 | float32 HELPER(rsqrte_f32)(float32 a, CPUState *env) |
2990 | { | |
e07be5d2 CL |
2991 | float_status *s = &env->vfp.standard_fp_status; |
2992 | int result_exp; | |
2993 | float64 f64; | |
2994 | uint32_t val; | |
2995 | uint64_t val64; | |
2996 | ||
2997 | val = float32_val(a); | |
2998 | ||
2999 | if (float32_is_any_nan(a)) { | |
3000 | if (float32_is_signaling_nan(a)) { | |
3001 | float_raise(float_flag_invalid, s); | |
3002 | } | |
3003 | return float32_default_nan; | |
3004 | } else if (float32_is_zero_or_denormal(a)) { | |
43fe9bdb PM |
3005 | if (!float32_is_zero(a)) { |
3006 | float_raise(float_flag_input_denormal, s); | |
3007 | } | |
e07be5d2 CL |
3008 | float_raise(float_flag_divbyzero, s); |
3009 | return float32_set_sign(float32_infinity, float32_is_neg(a)); | |
3010 | } else if (float32_is_neg(a)) { | |
3011 | float_raise(float_flag_invalid, s); | |
3012 | return float32_default_nan; | |
3013 | } else if (float32_is_infinity(a)) { | |
3014 | return float32_zero; | |
3015 | } | |
3016 | ||
3017 | /* Normalize to a double-precision value between 0.25 and 1.0, | |
3018 | * preserving the parity of the exponent. */ | |
3019 | if ((val & 0x800000) == 0) { | |
3020 | f64 = make_float64(((uint64_t)(val & 0x80000000) << 32) | |
3021 | | (0x3feULL << 52) | |
3022 | | ((uint64_t)(val & 0x7fffff) << 29)); | |
3023 | } else { | |
3024 | f64 = make_float64(((uint64_t)(val & 0x80000000) << 32) | |
3025 | | (0x3fdULL << 52) | |
3026 | | ((uint64_t)(val & 0x7fffff) << 29)); | |
3027 | } | |
3028 | ||
3029 | result_exp = (380 - ((val & 0x7f800000) >> 23)) / 2; | |
3030 | ||
3031 | f64 = recip_sqrt_estimate(f64, env); | |
3032 | ||
3033 | val64 = float64_val(f64); | |
3034 | ||
26cc6abf | 3035 | val = ((result_exp & 0xff) << 23) |
e07be5d2 CL |
3036 | | ((val64 >> 29) & 0x7fffff); |
3037 | return make_float32(val); | |
4373f3ce PB |
3038 | } |
3039 | ||
3040 | uint32_t HELPER(recpe_u32)(uint32_t a, CPUState *env) | |
3041 | { | |
fe0e4872 CL |
3042 | float64 f64; |
3043 | ||
3044 | if ((a & 0x80000000) == 0) { | |
3045 | return 0xffffffff; | |
3046 | } | |
3047 | ||
3048 | f64 = make_float64((0x3feULL << 52) | |
3049 | | ((int64_t)(a & 0x7fffffff) << 21)); | |
3050 | ||
3051 | f64 = recip_estimate (f64, env); | |
3052 | ||
3053 | return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); | |
4373f3ce PB |
3054 | } |
3055 | ||
3056 | uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUState *env) | |
3057 | { | |
e07be5d2 CL |
3058 | float64 f64; |
3059 | ||
3060 | if ((a & 0xc0000000) == 0) { | |
3061 | return 0xffffffff; | |
3062 | } | |
3063 | ||
3064 | if (a & 0x80000000) { | |
3065 | f64 = make_float64((0x3feULL << 52) | |
3066 | | ((uint64_t)(a & 0x7fffffff) << 21)); | |
3067 | } else { /* bits 31-30 == '01' */ | |
3068 | f64 = make_float64((0x3fdULL << 52) | |
3069 | | ((uint64_t)(a & 0x3fffffff) << 22)); | |
3070 | } | |
3071 | ||
3072 | f64 = recip_sqrt_estimate(f64, env); | |
3073 | ||
3074 | return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); | |
4373f3ce | 3075 | } |
fe1479c3 | 3076 | |
da97f52c PM |
3077 | /* VFPv4 fused multiply-accumulate */ |
3078 | float32 VFP_HELPER(muladd, s)(float32 a, float32 b, float32 c, void *fpstp) | |
3079 | { | |
3080 | float_status *fpst = fpstp; | |
3081 | return float32_muladd(a, b, c, 0, fpst); | |
3082 | } | |
3083 | ||
3084 | float64 VFP_HELPER(muladd, d)(float64 a, float64 b, float64 c, void *fpstp) | |
3085 | { | |
3086 | float_status *fpst = fpstp; | |
3087 | return float64_muladd(a, b, c, 0, fpst); | |
3088 | } | |
3089 | ||
fe1479c3 PB |
3090 | void HELPER(set_teecr)(CPUState *env, uint32_t val) |
3091 | { | |
3092 | val &= 1; | |
3093 | if (env->teecr != val) { | |
3094 | env->teecr = val; | |
3095 | tb_flush(env); | |
3096 | } | |
3097 | } |