xref: /openbmc/qemu/target/mips/cpu.c (revision 646b5378)
1 /*
2  * QEMU MIPS CPU
3  *
4  * Copyright (c) 2012 SUSE LINUX Products GmbH
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, see
18  * <http://www.gnu.org/licenses/lgpl-2.1.html>
19  */
20 
21 #include "qemu/osdep.h"
22 #include "qemu/cutils.h"
23 #include "qemu/qemu-print.h"
24 #include "qemu/error-report.h"
25 #include "qapi/error.h"
26 #include "cpu.h"
27 #include "internal.h"
28 #include "kvm_mips.h"
29 #include "qemu/module.h"
30 #include "sysemu/kvm.h"
31 #include "sysemu/qtest.h"
32 #include "exec/exec-all.h"
33 #include "hw/qdev-properties.h"
34 #include "hw/qdev-clock.h"
35 #include "semihosting/semihost.h"
36 #include "fpu_helper.h"
37 
38 const char regnames[32][3] = {
39     "r0", "at", "v0", "v1", "a0", "a1", "a2", "a3",
40     "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
41     "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
42     "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra",
43 };
44 
45 static void fpu_dump_fpr(fpr_t *fpr, FILE *f, bool is_fpu64)
46 {
47     if (is_fpu64) {
48         qemu_fprintf(f, "w:%08x d:%016" PRIx64 " fd:%13g fs:%13g psu: %13g\n",
49                      fpr->w[FP_ENDIAN_IDX], fpr->d,
50                      (double)fpr->fd,
51                      (double)fpr->fs[FP_ENDIAN_IDX],
52                      (double)fpr->fs[!FP_ENDIAN_IDX]);
53     } else {
54         fpr_t tmp;
55 
56         tmp.w[FP_ENDIAN_IDX] = fpr->w[FP_ENDIAN_IDX];
57         tmp.w[!FP_ENDIAN_IDX] = (fpr + 1)->w[FP_ENDIAN_IDX];
58         qemu_fprintf(f, "w:%08x d:%016" PRIx64 " fd:%13g fs:%13g psu:%13g\n",
59                      tmp.w[FP_ENDIAN_IDX], tmp.d,
60                      (double)tmp.fd,
61                      (double)tmp.fs[FP_ENDIAN_IDX],
62                      (double)tmp.fs[!FP_ENDIAN_IDX]);
63     }
64 }
65 
66 static void fpu_dump_state(CPUMIPSState *env, FILE *f, int flags)
67 {
68     int i;
69     bool is_fpu64 = !!(env->hflags & MIPS_HFLAG_F64);
70 
71     qemu_fprintf(f,
72                  "CP1 FCR0 0x%08x  FCR31 0x%08x  SR.FR %d  fp_status 0x%02x\n",
73                  env->active_fpu.fcr0, env->active_fpu.fcr31, is_fpu64,
74                  get_float_exception_flags(&env->active_fpu.fp_status));
75     for (i = 0; i < 32; (is_fpu64) ? i++ : (i += 2)) {
76         qemu_fprintf(f, "%3s: ", fregnames[i]);
77         fpu_dump_fpr(&env->active_fpu.fpr[i], f, is_fpu64);
78     }
79 }
80 
81 static void mips_cpu_dump_state(CPUState *cs, FILE *f, int flags)
82 {
83     CPUMIPSState *env = cpu_env(cs);
84     int i;
85 
86     qemu_fprintf(f, "pc=0x" TARGET_FMT_lx " HI=0x" TARGET_FMT_lx
87                  " LO=0x" TARGET_FMT_lx " ds %04x "
88                  TARGET_FMT_lx " " TARGET_FMT_ld "\n",
89                  env->active_tc.PC, env->active_tc.HI[0], env->active_tc.LO[0],
90                  env->hflags, env->btarget, env->bcond);
91     for (i = 0; i < 32; i++) {
92         if ((i & 3) == 0) {
93             qemu_fprintf(f, "GPR%02d:", i);
94         }
95         qemu_fprintf(f, " %s " TARGET_FMT_lx,
96                      regnames[i], env->active_tc.gpr[i]);
97         if ((i & 3) == 3) {
98             qemu_fprintf(f, "\n");
99         }
100     }
101 
102     qemu_fprintf(f, "CP0 Status  0x%08x Cause   0x%08x EPC    0x"
103                  TARGET_FMT_lx "\n",
104                  env->CP0_Status, env->CP0_Cause, env->CP0_EPC);
105     qemu_fprintf(f, "    Config0 0x%08x Config1 0x%08x LLAddr 0x%016"
106                  PRIx64 "\n",
107                  env->CP0_Config0, env->CP0_Config1, env->CP0_LLAddr);
108     qemu_fprintf(f, "    Config2 0x%08x Config3 0x%08x\n",
109                  env->CP0_Config2, env->CP0_Config3);
110     qemu_fprintf(f, "    Config4 0x%08x Config5 0x%08x\n",
111                  env->CP0_Config4, env->CP0_Config5);
112     if ((flags & CPU_DUMP_FPU) && (env->hflags & MIPS_HFLAG_FPU)) {
113         fpu_dump_state(env, f, flags);
114     }
115 }
116 
117 void cpu_set_exception_base(int vp_index, target_ulong address)
118 {
119     MIPSCPU *vp = MIPS_CPU(qemu_get_cpu(vp_index));
120     vp->env.exception_base = address;
121 }
122 
123 static void mips_cpu_set_pc(CPUState *cs, vaddr value)
124 {
125     mips_env_set_pc(cpu_env(cs), value);
126 }
127 
128 static vaddr mips_cpu_get_pc(CPUState *cs)
129 {
130     MIPSCPU *cpu = MIPS_CPU(cs);
131 
132     return cpu->env.active_tc.PC;
133 }
134 
135 static bool mips_cpu_has_work(CPUState *cs)
136 {
137     CPUMIPSState *env = cpu_env(cs);
138     bool has_work = false;
139 
140     /*
141      * Prior to MIPS Release 6 it is implementation dependent if non-enabled
142      * interrupts wake-up the CPU, however most of the implementations only
143      * check for interrupts that can be taken. For pre-release 6 CPUs,
144      * check for CP0 Config7 'Wait IE ignore' bit.
145      */
146     if ((cs->interrupt_request & CPU_INTERRUPT_HARD) &&
147         cpu_mips_hw_interrupts_pending(env)) {
148         if (cpu_mips_hw_interrupts_enabled(env) ||
149             (env->CP0_Config7 & (1 << CP0C7_WII)) ||
150             (env->insn_flags & ISA_MIPS_R6)) {
151             has_work = true;
152         }
153     }
154 
155     /* MIPS-MT has the ability to halt the CPU.  */
156     if (ase_mt_available(env)) {
157         /*
158          * The QEMU model will issue an _WAKE request whenever the CPUs
159          * should be woken up.
160          */
161         if (cs->interrupt_request & CPU_INTERRUPT_WAKE) {
162             has_work = true;
163         }
164 
165         if (!mips_vpe_active(env)) {
166             has_work = false;
167         }
168     }
169     /* MIPS Release 6 has the ability to halt the CPU.  */
170     if (env->CP0_Config5 & (1 << CP0C5_VP)) {
171         if (cs->interrupt_request & CPU_INTERRUPT_WAKE) {
172             has_work = true;
173         }
174         if (!mips_vp_active(env)) {
175             has_work = false;
176         }
177     }
178     return has_work;
179 }
180 
181 static int mips_cpu_mmu_index(CPUState *cs, bool ifunc)
182 {
183     return mips_env_mmu_index(cpu_env(cs));
184 }
185 
186 #include "cpu-defs.c.inc"
187 
188 static void mips_cpu_reset_hold(Object *obj, ResetType type)
189 {
190     CPUState *cs = CPU(obj);
191     MIPSCPU *cpu = MIPS_CPU(cs);
192     MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(obj);
193     CPUMIPSState *env = &cpu->env;
194 
195     if (mcc->parent_phases.hold) {
196         mcc->parent_phases.hold(obj, type);
197     }
198 
199     memset(env, 0, offsetof(CPUMIPSState, end_reset_fields));
200 
201     /* Reset registers to their default values */
202     env->CP0_PRid = env->cpu_model->CP0_PRid;
203     env->CP0_Config0 = deposit32(env->cpu_model->CP0_Config0,
204                                  CP0C0_BE, 1, cpu->is_big_endian);
205     env->CP0_Config1 = env->cpu_model->CP0_Config1;
206     env->CP0_Config2 = env->cpu_model->CP0_Config2;
207     env->CP0_Config3 = env->cpu_model->CP0_Config3;
208     env->CP0_Config4 = env->cpu_model->CP0_Config4;
209     env->CP0_Config4_rw_bitmask = env->cpu_model->CP0_Config4_rw_bitmask;
210     env->CP0_Config5 = env->cpu_model->CP0_Config5;
211     env->CP0_Config5_rw_bitmask = env->cpu_model->CP0_Config5_rw_bitmask;
212     env->CP0_Config6 = env->cpu_model->CP0_Config6;
213     env->CP0_Config6_rw_bitmask = env->cpu_model->CP0_Config6_rw_bitmask;
214     env->CP0_Config7 = env->cpu_model->CP0_Config7;
215     env->CP0_Config7_rw_bitmask = env->cpu_model->CP0_Config7_rw_bitmask;
216     env->CP0_LLAddr_rw_bitmask = env->cpu_model->CP0_LLAddr_rw_bitmask
217                                  << env->cpu_model->CP0_LLAddr_shift;
218     env->CP0_LLAddr_shift = env->cpu_model->CP0_LLAddr_shift;
219     env->SYNCI_Step = env->cpu_model->SYNCI_Step;
220     env->CCRes = env->cpu_model->CCRes;
221     env->CP0_Status_rw_bitmask = env->cpu_model->CP0_Status_rw_bitmask;
222     env->CP0_TCStatus_rw_bitmask = env->cpu_model->CP0_TCStatus_rw_bitmask;
223     env->CP0_SRSCtl = env->cpu_model->CP0_SRSCtl;
224     env->current_tc = 0;
225     env->SEGBITS = env->cpu_model->SEGBITS;
226     env->SEGMask = (target_ulong)((1ULL << env->cpu_model->SEGBITS) - 1);
227 #if defined(TARGET_MIPS64)
228     if (env->cpu_model->insn_flags & ISA_MIPS3) {
229         env->SEGMask |= 3ULL << 62;
230     }
231 #endif
232     env->PABITS = env->cpu_model->PABITS;
233     env->CP0_SRSConf0_rw_bitmask = env->cpu_model->CP0_SRSConf0_rw_bitmask;
234     env->CP0_SRSConf0 = env->cpu_model->CP0_SRSConf0;
235     env->CP0_SRSConf1_rw_bitmask = env->cpu_model->CP0_SRSConf1_rw_bitmask;
236     env->CP0_SRSConf1 = env->cpu_model->CP0_SRSConf1;
237     env->CP0_SRSConf2_rw_bitmask = env->cpu_model->CP0_SRSConf2_rw_bitmask;
238     env->CP0_SRSConf2 = env->cpu_model->CP0_SRSConf2;
239     env->CP0_SRSConf3_rw_bitmask = env->cpu_model->CP0_SRSConf3_rw_bitmask;
240     env->CP0_SRSConf3 = env->cpu_model->CP0_SRSConf3;
241     env->CP0_SRSConf4_rw_bitmask = env->cpu_model->CP0_SRSConf4_rw_bitmask;
242     env->CP0_SRSConf4 = env->cpu_model->CP0_SRSConf4;
243     env->CP0_PageGrain_rw_bitmask = env->cpu_model->CP0_PageGrain_rw_bitmask;
244     env->CP0_PageGrain = env->cpu_model->CP0_PageGrain;
245     env->CP0_EBaseWG_rw_bitmask = env->cpu_model->CP0_EBaseWG_rw_bitmask;
246     env->lcsr_cpucfg1 = env->cpu_model->lcsr_cpucfg1;
247     env->lcsr_cpucfg2 = env->cpu_model->lcsr_cpucfg2;
248     env->active_fpu.fcr0 = env->cpu_model->CP1_fcr0;
249     env->active_fpu.fcr31_rw_bitmask = env->cpu_model->CP1_fcr31_rw_bitmask;
250     env->active_fpu.fcr31 = env->cpu_model->CP1_fcr31;
251     env->msair = env->cpu_model->MSAIR;
252     env->insn_flags = env->cpu_model->insn_flags;
253 
254 #if defined(CONFIG_USER_ONLY)
255     env->CP0_Status = (MIPS_HFLAG_UM << CP0St_KSU);
256 # ifdef TARGET_MIPS64
257     /* Enable 64-bit register mode.  */
258     env->CP0_Status |= (1 << CP0St_PX);
259 # endif
260 # ifdef TARGET_ABI_MIPSN64
261     /* Enable 64-bit address mode.  */
262     env->CP0_Status |= (1 << CP0St_UX);
263 # endif
264     /*
265      * Enable access to the CPUNum, SYNCI_Step, CC, and CCRes RDHWR
266      * hardware registers.
267      */
268     env->CP0_HWREna |= 0x0000000F;
269     if (env->CP0_Config1 & (1 << CP0C1_FP)) {
270         env->CP0_Status |= (1 << CP0St_CU1);
271     }
272     if (env->CP0_Config3 & (1 << CP0C3_DSPP)) {
273         env->CP0_Status |= (1 << CP0St_MX);
274     }
275 # if defined(TARGET_MIPS64)
276     /* For MIPS64, init FR bit to 1 if FPU unit is there and bit is writable. */
277     if ((env->CP0_Config1 & (1 << CP0C1_FP)) &&
278         (env->CP0_Status_rw_bitmask & (1 << CP0St_FR))) {
279         env->CP0_Status |= (1 << CP0St_FR);
280     }
281 # endif
282 #else /* !CONFIG_USER_ONLY */
283     if (env->hflags & MIPS_HFLAG_BMASK) {
284         /*
285          * If the exception was raised from a delay slot,
286          * come back to the jump.
287          */
288         env->CP0_ErrorEPC = (env->active_tc.PC
289                              - (env->hflags & MIPS_HFLAG_B16 ? 2 : 4));
290     } else {
291         env->CP0_ErrorEPC = env->active_tc.PC;
292     }
293     env->active_tc.PC = env->exception_base;
294     env->CP0_Random = env->tlb->nb_tlb - 1;
295     env->tlb->tlb_in_use = env->tlb->nb_tlb;
296     env->CP0_Wired = 0;
297     env->CP0_GlobalNumber = (cs->cpu_index & 0xFF) << CP0GN_VPId;
298     env->CP0_EBase = KSEG0_BASE | (cs->cpu_index & 0x3FF);
299     if (env->CP0_Config3 & (1 << CP0C3_CMGCR)) {
300         env->CP0_CMGCRBase = 0x1fbf8000 >> 4;
301     }
302     env->CP0_EntryHi_ASID_mask = (env->CP0_Config5 & (1 << CP0C5_MI)) ?
303             0x0 : (env->CP0_Config4 & (1 << CP0C4_AE)) ? 0x3ff : 0xff;
304     env->CP0_Status = (1 << CP0St_BEV) | (1 << CP0St_ERL);
305     if (env->insn_flags & INSN_LOONGSON2F) {
306         /* Loongson-2F has those bits hardcoded to 1 */
307         env->CP0_Status |= (1 << CP0St_KX) | (1 << CP0St_SX) |
308                             (1 << CP0St_UX);
309     }
310 
311     /*
312      * Vectored interrupts not implemented, timer on int 7,
313      * no performance counters.
314      */
315     env->CP0_IntCtl = 0xe0000000;
316     {
317         int i;
318 
319         for (i = 0; i < 7; i++) {
320             env->CP0_WatchLo[i] = 0;
321             env->CP0_WatchHi[i] = 1 << CP0WH_M;
322         }
323         env->CP0_WatchLo[7] = 0;
324         env->CP0_WatchHi[7] = 0;
325     }
326     /* Count register increments in debug mode, EJTAG version 1 */
327     env->CP0_Debug = (1 << CP0DB_CNT) | (0x1 << CP0DB_VER);
328 
329     cpu_mips_store_count(env, 1);
330 
331     if (ase_mt_available(env)) {
332         int i;
333 
334         /* Only TC0 on VPE 0 starts as active.  */
335         for (i = 0; i < ARRAY_SIZE(env->tcs); i++) {
336             env->tcs[i].CP0_TCBind = cs->cpu_index << CP0TCBd_CurVPE;
337             env->tcs[i].CP0_TCHalt = 1;
338         }
339         env->active_tc.CP0_TCHalt = 1;
340         cs->halted = 1;
341 
342         if (cs->cpu_index == 0) {
343             /* VPE0 starts up enabled.  */
344             env->mvp->CP0_MVPControl |= (1 << CP0MVPCo_EVP);
345             env->CP0_VPEConf0 |= (1 << CP0VPEC0_MVP) | (1 << CP0VPEC0_VPA);
346 
347             /* TC0 starts up unhalted.  */
348             cs->halted = 0;
349             env->active_tc.CP0_TCHalt = 0;
350             env->tcs[0].CP0_TCHalt = 0;
351             /* With thread 0 active.  */
352             env->active_tc.CP0_TCStatus = (1 << CP0TCSt_A);
353             env->tcs[0].CP0_TCStatus = (1 << CP0TCSt_A);
354         }
355     }
356 
357     /*
358      * Configure default legacy segmentation control. We use this regardless of
359      * whether segmentation control is presented to the guest.
360      */
361     /* KSeg3 (seg0 0xE0000000..0xFFFFFFFF) */
362     env->CP0_SegCtl0 =   (CP0SC_AM_MK << CP0SC_AM);
363     /* KSeg2 (seg1 0xC0000000..0xDFFFFFFF) */
364     env->CP0_SegCtl0 |= ((CP0SC_AM_MSK << CP0SC_AM)) << 16;
365     /* KSeg1 (seg2 0xA0000000..0x9FFFFFFF) */
366     env->CP0_SegCtl1 =   (0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) |
367                          (2 << CP0SC_C);
368     /* KSeg0 (seg3 0x80000000..0x9FFFFFFF) */
369     env->CP0_SegCtl1 |= ((0 << CP0SC_PA) | (CP0SC_AM_UK << CP0SC_AM) |
370                          (3 << CP0SC_C)) << 16;
371     /* USeg (seg4 0x40000000..0x7FFFFFFF) */
372     env->CP0_SegCtl2 =   (2 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) |
373                          (1 << CP0SC_EU) | (2 << CP0SC_C);
374     /* USeg (seg5 0x00000000..0x3FFFFFFF) */
375     env->CP0_SegCtl2 |= ((0 << CP0SC_PA) | (CP0SC_AM_MUSK << CP0SC_AM) |
376                          (1 << CP0SC_EU) | (2 << CP0SC_C)) << 16;
377     /* XKPhys (note, SegCtl2.XR = 0, so XAM won't be used) */
378     env->CP0_SegCtl1 |= (CP0SC_AM_UK << CP0SC1_XAM);
379 #endif /* !CONFIG_USER_ONLY */
380     if ((env->insn_flags & ISA_MIPS_R6) &&
381         (env->active_fpu.fcr0 & (1 << FCR0_F64))) {
382         /* Status.FR = 0 mode in 64-bit FPU not allowed in R6 */
383         env->CP0_Status |= (1 << CP0St_FR);
384     }
385 
386     if (env->insn_flags & ISA_MIPS_R6) {
387         /* PTW  =  1 */
388         env->CP0_PWSize = 0x40;
389         /* GDI  = 12 */
390         /* UDI  = 12 */
391         /* MDI  = 12 */
392         /* PRI  = 12 */
393         /* PTEI =  2 */
394         env->CP0_PWField = 0x0C30C302;
395     } else {
396         /* GDI  =  0 */
397         /* UDI  =  0 */
398         /* MDI  =  0 */
399         /* PRI  =  0 */
400         /* PTEI =  2 */
401         env->CP0_PWField = 0x02;
402     }
403 
404     if (env->CP0_Config3 & (1 << CP0C3_ISA) & (1 << (CP0C3_ISA + 1))) {
405         /*  microMIPS on reset when Config3.ISA is 3 */
406         env->hflags |= MIPS_HFLAG_M16;
407     }
408 
409     msa_reset(env);
410 
411     compute_hflags(env);
412     restore_fp_status(env);
413     restore_pamask(env);
414     cs->exception_index = EXCP_NONE;
415 
416     if (semihosting_get_argc()) {
417         /* UHI interface can be used to obtain argc and argv */
418         env->active_tc.gpr[4] = -1;
419     }
420 
421 #ifndef CONFIG_USER_ONLY
422     if (kvm_enabled()) {
423         kvm_mips_reset_vcpu(cpu);
424     }
425 #endif
426 }
427 
428 static void mips_cpu_disas_set_info(CPUState *s, disassemble_info *info)
429 {
430     if (!(cpu_env(s)->insn_flags & ISA_NANOMIPS32)) {
431 #if TARGET_BIG_ENDIAN
432         info->print_insn = print_insn_big_mips;
433 #else
434         info->print_insn = print_insn_little_mips;
435 #endif
436     } else {
437         info->print_insn = print_insn_nanomips;
438     }
439 }
440 
441 /*
442  * Since commit 6af0bf9c7c3 this model assumes a CPU clocked at 200MHz.
443  */
444 #define CPU_FREQ_HZ_DEFAULT     200000000
445 
446 static void mips_cp0_period_set(MIPSCPU *cpu)
447 {
448     CPUMIPSState *env = &cpu->env;
449 
450     clock_set_mul_div(cpu->count_div, env->cpu_model->CCRes, 1);
451     clock_set_source(cpu->count_div, cpu->clock);
452     clock_set_source(env->count_clock, cpu->count_div);
453 }
454 
455 static void mips_cpu_realizefn(DeviceState *dev, Error **errp)
456 {
457     CPUState *cs = CPU(dev);
458     MIPSCPU *cpu = MIPS_CPU(dev);
459     CPUMIPSState *env = &cpu->env;
460     MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(dev);
461     Error *local_err = NULL;
462 
463     if (!clock_get(cpu->clock)) {
464 #ifndef CONFIG_USER_ONLY
465         if (!qtest_enabled()) {
466             g_autofree char *cpu_freq_str = freq_to_str(CPU_FREQ_HZ_DEFAULT);
467 
468             warn_report("CPU input clock is not connected to any output clock, "
469                         "using default frequency of %s.", cpu_freq_str);
470         }
471 #endif
472         /* Initialize the frequency in case the clock remains unconnected. */
473         clock_set_hz(cpu->clock, CPU_FREQ_HZ_DEFAULT);
474     }
475     mips_cp0_period_set(cpu);
476 
477     cpu_exec_realizefn(cs, &local_err);
478     if (local_err != NULL) {
479         error_propagate(errp, local_err);
480         return;
481     }
482 
483     env->exception_base = (int32_t)0xBFC00000;
484 
485 #if defined(CONFIG_TCG) && !defined(CONFIG_USER_ONLY)
486     mmu_init(env, env->cpu_model);
487 #endif
488     fpu_init(env, env->cpu_model);
489     mvp_init(env);
490 
491     cpu_reset(cs);
492     qemu_init_vcpu(cs);
493 
494     mcc->parent_realize(dev, errp);
495 }
496 
497 static void mips_cpu_initfn(Object *obj)
498 {
499     MIPSCPU *cpu = MIPS_CPU(obj);
500     CPUMIPSState *env = &cpu->env;
501     MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(obj);
502 
503     cpu->clock = qdev_init_clock_in(DEVICE(obj), "clk-in", NULL, cpu, 0);
504     cpu->count_div = clock_new(OBJECT(obj), "clk-div-count");
505     env->count_clock = clock_new(OBJECT(obj), "clk-count");
506     env->cpu_model = mcc->cpu_def;
507 #ifndef CONFIG_USER_ONLY
508     if (mcc->cpu_def->lcsr_cpucfg2 & (1 << CPUCFG2_LCSRP)) {
509         memory_region_init_io(&env->iocsr.mr, OBJECT(cpu), NULL,
510                                 env, "iocsr", UINT64_MAX);
511         address_space_init(&env->iocsr.as,
512                             &env->iocsr.mr, "IOCSR");
513     }
514 #endif
515 }
516 
517 static char *mips_cpu_type_name(const char *cpu_model)
518 {
519     return g_strdup_printf(MIPS_CPU_TYPE_NAME("%s"), cpu_model);
520 }
521 
522 static ObjectClass *mips_cpu_class_by_name(const char *cpu_model)
523 {
524     ObjectClass *oc;
525     char *typename;
526 
527     typename = mips_cpu_type_name(cpu_model);
528     oc = object_class_by_name(typename);
529     g_free(typename);
530     return oc;
531 }
532 
533 #ifndef CONFIG_USER_ONLY
534 #include "hw/core/sysemu-cpu-ops.h"
535 
536 static const struct SysemuCPUOps mips_sysemu_ops = {
537     .get_phys_page_debug = mips_cpu_get_phys_page_debug,
538     .legacy_vmsd = &vmstate_mips_cpu,
539 };
540 #endif
541 
542 static Property mips_cpu_properties[] = {
543     DEFINE_PROP_BOOL("big-endian", MIPSCPU, is_big_endian, TARGET_BIG_ENDIAN),
544     DEFINE_PROP_END_OF_LIST(),
545 };
546 
547 #ifdef CONFIG_TCG
548 #include "hw/core/tcg-cpu-ops.h"
549 /*
550  * NB: cannot be const, as some elements are changed for specific
551  * mips hardware (see hw/mips/jazz.c).
552  */
553 static const TCGCPUOps mips_tcg_ops = {
554     .initialize = mips_tcg_init,
555     .synchronize_from_tb = mips_cpu_synchronize_from_tb,
556     .restore_state_to_opc = mips_restore_state_to_opc,
557 
558 #if !defined(CONFIG_USER_ONLY)
559     .tlb_fill = mips_cpu_tlb_fill,
560     .cpu_exec_interrupt = mips_cpu_exec_interrupt,
561     .cpu_exec_halt = mips_cpu_has_work,
562     .do_interrupt = mips_cpu_do_interrupt,
563     .do_transaction_failed = mips_cpu_do_transaction_failed,
564     .do_unaligned_access = mips_cpu_do_unaligned_access,
565     .io_recompile_replay_branch = mips_io_recompile_replay_branch,
566 #endif /* !CONFIG_USER_ONLY */
567 };
568 #endif /* CONFIG_TCG */
569 
570 static void mips_cpu_class_init(ObjectClass *c, void *data)
571 {
572     MIPSCPUClass *mcc = MIPS_CPU_CLASS(c);
573     CPUClass *cc = CPU_CLASS(c);
574     DeviceClass *dc = DEVICE_CLASS(c);
575     ResettableClass *rc = RESETTABLE_CLASS(c);
576 
577     device_class_set_props(dc, mips_cpu_properties);
578     device_class_set_parent_realize(dc, mips_cpu_realizefn,
579                                     &mcc->parent_realize);
580     resettable_class_set_parent_phases(rc, NULL, mips_cpu_reset_hold, NULL,
581                                        &mcc->parent_phases);
582 
583     cc->class_by_name = mips_cpu_class_by_name;
584     cc->has_work = mips_cpu_has_work;
585     cc->mmu_index = mips_cpu_mmu_index;
586     cc->dump_state = mips_cpu_dump_state;
587     cc->set_pc = mips_cpu_set_pc;
588     cc->get_pc = mips_cpu_get_pc;
589     cc->gdb_read_register = mips_cpu_gdb_read_register;
590     cc->gdb_write_register = mips_cpu_gdb_write_register;
591 #ifndef CONFIG_USER_ONLY
592     cc->sysemu_ops = &mips_sysemu_ops;
593 #endif
594     cc->disas_set_info = mips_cpu_disas_set_info;
595     cc->gdb_num_core_regs = 73;
596     cc->gdb_stop_before_watchpoint = true;
597 #ifdef CONFIG_TCG
598     cc->tcg_ops = &mips_tcg_ops;
599 #endif /* CONFIG_TCG */
600 }
601 
602 static const TypeInfo mips_cpu_type_info = {
603     .name = TYPE_MIPS_CPU,
604     .parent = TYPE_CPU,
605     .instance_size = sizeof(MIPSCPU),
606     .instance_align = __alignof(MIPSCPU),
607     .instance_init = mips_cpu_initfn,
608     .abstract = true,
609     .class_size = sizeof(MIPSCPUClass),
610     .class_init = mips_cpu_class_init,
611 };
612 
613 static void mips_cpu_cpudef_class_init(ObjectClass *oc, void *data)
614 {
615     MIPSCPUClass *mcc = MIPS_CPU_CLASS(oc);
616     mcc->cpu_def = data;
617 }
618 
619 static void mips_register_cpudef_type(const struct mips_def_t *def)
620 {
621     char *typename = mips_cpu_type_name(def->name);
622     TypeInfo ti = {
623         .name = typename,
624         .parent = TYPE_MIPS_CPU,
625         .class_init = mips_cpu_cpudef_class_init,
626         .class_data = (void *)def,
627     };
628 
629     type_register(&ti);
630     g_free(typename);
631 }
632 
633 static void mips_cpu_register_types(void)
634 {
635     int i;
636 
637     type_register_static(&mips_cpu_type_info);
638     for (i = 0; i < mips_defs_number; i++) {
639         mips_register_cpudef_type(&mips_defs[i]);
640     }
641 }
642 
643 type_init(mips_cpu_register_types)
644 
645 /* Could be used by generic CPU object */
646 MIPSCPU *mips_cpu_create_with_clock(const char *cpu_type, Clock *cpu_refclk,
647                                     bool is_big_endian)
648 {
649     DeviceState *cpu;
650 
651     cpu = DEVICE(object_new(cpu_type));
652     qdev_connect_clock_in(cpu, "clk-in", cpu_refclk);
653     object_property_set_bool(OBJECT(cpu), "big-endian", is_big_endian,
654                              &error_abort);
655     qdev_realize(cpu, NULL, &error_abort);
656 
657     return MIPS_CPU(cpu);
658 }
659 
660 bool cpu_supports_isa(const CPUMIPSState *env, uint64_t isa_mask)
661 {
662     return (env->cpu_model->insn_flags & isa_mask) != 0;
663 }
664 
665 bool cpu_type_supports_isa(const char *cpu_type, uint64_t isa)
666 {
667     const MIPSCPUClass *mcc = MIPS_CPU_CLASS(object_class_by_name(cpu_type));
668     return (mcc->cpu_def->insn_flags & isa) != 0;
669 }
670 
671 bool cpu_type_supports_cps_smp(const char *cpu_type)
672 {
673     const MIPSCPUClass *mcc = MIPS_CPU_CLASS(object_class_by_name(cpu_type));
674     return (mcc->cpu_def->CP0_Config3 & (1 << CP0C3_CMGCR)) != 0;
675 }
676