xref: /openbmc/qemu/target/xtensa/cpu.h (revision 60e58bd9f08a3b91a35850f7501a0a1bcf912b6f) 
1 /*
2  * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *     * Redistributions of source code must retain the above copyright
8  *       notice, this list of conditions and the following disclaimer.
9  *     * Redistributions in binary form must reproduce the above copyright
10  *       notice, this list of conditions and the following disclaimer in the
11  *       documentation and/or other materials provided with the distribution.
12  *     * Neither the name of the Open Source and Linux Lab nor the
13  *       names of its contributors may be used to endorse or promote products
14  *       derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 #ifndef XTENSA_CPU_H
29 #define XTENSA_CPU_H
30 
31 #define ALIGNED_ONLY
32 #define TARGET_LONG_BITS 32
33 
34 #define CPUArchState struct CPUXtensaState
35 
36 #include "qemu-common.h"
37 #include "cpu-qom.h"
38 #include "exec/cpu-defs.h"
39 #include "fpu/softfloat.h"
40 #include "xtensa-isa.h"
41 
42 #define NB_MMU_MODES 4
43 
44 #define TARGET_PHYS_ADDR_SPACE_BITS 32
45 #define TARGET_VIRT_ADDR_SPACE_BITS 32
46 #define TARGET_PAGE_BITS 12
47 
48 enum {
49     /* Additional instructions */
50     XTENSA_OPTION_CODE_DENSITY,
51     XTENSA_OPTION_LOOP,
52     XTENSA_OPTION_EXTENDED_L32R,
53     XTENSA_OPTION_16_BIT_IMUL,
54     XTENSA_OPTION_32_BIT_IMUL,
55     XTENSA_OPTION_32_BIT_IMUL_HIGH,
56     XTENSA_OPTION_32_BIT_IDIV,
57     XTENSA_OPTION_MAC16,
58     XTENSA_OPTION_MISC_OP_NSA,
59     XTENSA_OPTION_MISC_OP_MINMAX,
60     XTENSA_OPTION_MISC_OP_SEXT,
61     XTENSA_OPTION_MISC_OP_CLAMPS,
62     XTENSA_OPTION_COPROCESSOR,
63     XTENSA_OPTION_BOOLEAN,
64     XTENSA_OPTION_FP_COPROCESSOR,
65     XTENSA_OPTION_MP_SYNCHRO,
66     XTENSA_OPTION_CONDITIONAL_STORE,
67     XTENSA_OPTION_ATOMCTL,
68     XTENSA_OPTION_DEPBITS,
69 
70     /* Interrupts and exceptions */
71     XTENSA_OPTION_EXCEPTION,
72     XTENSA_OPTION_RELOCATABLE_VECTOR,
73     XTENSA_OPTION_UNALIGNED_EXCEPTION,
74     XTENSA_OPTION_INTERRUPT,
75     XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
76     XTENSA_OPTION_TIMER_INTERRUPT,
77 
78     /* Local memory */
79     XTENSA_OPTION_ICACHE,
80     XTENSA_OPTION_ICACHE_TEST,
81     XTENSA_OPTION_ICACHE_INDEX_LOCK,
82     XTENSA_OPTION_DCACHE,
83     XTENSA_OPTION_DCACHE_TEST,
84     XTENSA_OPTION_DCACHE_INDEX_LOCK,
85     XTENSA_OPTION_IRAM,
86     XTENSA_OPTION_IROM,
87     XTENSA_OPTION_DRAM,
88     XTENSA_OPTION_DROM,
89     XTENSA_OPTION_XLMI,
90     XTENSA_OPTION_HW_ALIGNMENT,
91     XTENSA_OPTION_MEMORY_ECC_PARITY,
92 
93     /* Memory protection and translation */
94     XTENSA_OPTION_REGION_PROTECTION,
95     XTENSA_OPTION_REGION_TRANSLATION,
96     XTENSA_OPTION_MMU,
97     XTENSA_OPTION_CACHEATTR,
98 
99     /* Other */
100     XTENSA_OPTION_WINDOWED_REGISTER,
101     XTENSA_OPTION_PROCESSOR_INTERFACE,
102     XTENSA_OPTION_MISC_SR,
103     XTENSA_OPTION_THREAD_POINTER,
104     XTENSA_OPTION_PROCESSOR_ID,
105     XTENSA_OPTION_DEBUG,
106     XTENSA_OPTION_TRACE_PORT,
107     XTENSA_OPTION_EXTERN_REGS,
108 };
109 
110 enum {
111     EXPSTATE = 230,
112     THREADPTR = 231,
113     FCR = 232,
114     FSR = 233,
115 };
116 
117 enum {
118     LBEG = 0,
119     LEND = 1,
120     LCOUNT = 2,
121     SAR = 3,
122     BR = 4,
123     LITBASE = 5,
124     SCOMPARE1 = 12,
125     ACCLO = 16,
126     ACCHI = 17,
127     MR = 32,
128     WINDOW_BASE = 72,
129     WINDOW_START = 73,
130     PTEVADDR = 83,
131     MMID = 89,
132     RASID = 90,
133     ITLBCFG = 91,
134     DTLBCFG = 92,
135     IBREAKENABLE = 96,
136     MEMCTL = 97,
137     CACHEATTR = 98,
138     ATOMCTL = 99,
139     DDR = 104,
140     IBREAKA = 128,
141     DBREAKA = 144,
142     DBREAKC = 160,
143     CONFIGID0 = 176,
144     EPC1 = 177,
145     DEPC = 192,
146     EPS2 = 194,
147     CONFIGID1 = 208,
148     EXCSAVE1 = 209,
149     CPENABLE = 224,
150     INTSET = 226,
151     INTCLEAR = 227,
152     INTENABLE = 228,
153     PS = 230,
154     VECBASE = 231,
155     EXCCAUSE = 232,
156     DEBUGCAUSE = 233,
157     CCOUNT = 234,
158     PRID = 235,
159     ICOUNT = 236,
160     ICOUNTLEVEL = 237,
161     EXCVADDR = 238,
162     CCOMPARE = 240,
163     MISC = 244,
164 };
165 
166 #define PS_INTLEVEL 0xf
167 #define PS_INTLEVEL_SHIFT 0
168 
169 #define PS_EXCM 0x10
170 #define PS_UM 0x20
171 
172 #define PS_RING 0xc0
173 #define PS_RING_SHIFT 6
174 
175 #define PS_OWB 0xf00
176 #define PS_OWB_SHIFT 8
177 
178 #define PS_CALLINC 0x30000
179 #define PS_CALLINC_SHIFT 16
180 #define PS_CALLINC_LEN 2
181 
182 #define PS_WOE 0x40000
183 
184 #define DEBUGCAUSE_IC 0x1
185 #define DEBUGCAUSE_IB 0x2
186 #define DEBUGCAUSE_DB 0x4
187 #define DEBUGCAUSE_BI 0x8
188 #define DEBUGCAUSE_BN 0x10
189 #define DEBUGCAUSE_DI 0x20
190 #define DEBUGCAUSE_DBNUM 0xf00
191 #define DEBUGCAUSE_DBNUM_SHIFT 8
192 
193 #define DBREAKC_SB 0x80000000
194 #define DBREAKC_LB 0x40000000
195 #define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
196 #define DBREAKC_MASK 0x3f
197 
198 #define MEMCTL_INIT 0x00800000
199 #define MEMCTL_IUSEWAYS_SHIFT 18
200 #define MEMCTL_IUSEWAYS_LEN 5
201 #define MEMCTL_IUSEWAYS_MASK 0x007c0000
202 #define MEMCTL_DALLOCWAYS_SHIFT 13
203 #define MEMCTL_DALLOCWAYS_LEN 5
204 #define MEMCTL_DALLOCWAYS_MASK 0x0003e000
205 #define MEMCTL_DUSEWAYS_SHIFT 8
206 #define MEMCTL_DUSEWAYS_LEN 5
207 #define MEMCTL_DUSEWAYS_MASK 0x00001f00
208 #define MEMCTL_ISNP 0x4
209 #define MEMCTL_DSNP 0x2
210 #define MEMCTL_IL0EN 0x1
211 
212 #define MAX_INSN_LENGTH 64
213 #define MAX_OPCODE_ARGS 16
214 #define MAX_NAREG 64
215 #define MAX_NINTERRUPT 32
216 #define MAX_NLEVEL 6
217 #define MAX_NNMI 1
218 #define MAX_NCCOMPARE 3
219 #define MAX_TLB_WAY_SIZE 8
220 #define MAX_NDBREAK 2
221 #define MAX_NMEMORY 4
222 
223 #define REGION_PAGE_MASK 0xe0000000
224 
225 #define PAGE_CACHE_MASK    0x700
226 #define PAGE_CACHE_SHIFT   8
227 #define PAGE_CACHE_INVALID 0x000
228 #define PAGE_CACHE_BYPASS  0x100
229 #define PAGE_CACHE_WT      0x200
230 #define PAGE_CACHE_WB      0x400
231 #define PAGE_CACHE_ISOLATE 0x600
232 
233 enum {
234     /* Static vectors */
235     EXC_RESET0,
236     EXC_RESET1,
237     EXC_MEMORY_ERROR,
238 
239     /* Dynamic vectors */
240     EXC_WINDOW_OVERFLOW4,
241     EXC_WINDOW_UNDERFLOW4,
242     EXC_WINDOW_OVERFLOW8,
243     EXC_WINDOW_UNDERFLOW8,
244     EXC_WINDOW_OVERFLOW12,
245     EXC_WINDOW_UNDERFLOW12,
246     EXC_IRQ,
247     EXC_KERNEL,
248     EXC_USER,
249     EXC_DOUBLE,
250     EXC_DEBUG,
251     EXC_MAX
252 };
253 
254 enum {
255     ILLEGAL_INSTRUCTION_CAUSE = 0,
256     SYSCALL_CAUSE,
257     INSTRUCTION_FETCH_ERROR_CAUSE,
258     LOAD_STORE_ERROR_CAUSE,
259     LEVEL1_INTERRUPT_CAUSE,
260     ALLOCA_CAUSE,
261     INTEGER_DIVIDE_BY_ZERO_CAUSE,
262     PRIVILEGED_CAUSE = 8,
263     LOAD_STORE_ALIGNMENT_CAUSE,
264 
265     INSTR_PIF_DATA_ERROR_CAUSE = 12,
266     LOAD_STORE_PIF_DATA_ERROR_CAUSE,
267     INSTR_PIF_ADDR_ERROR_CAUSE,
268     LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
269 
270     INST_TLB_MISS_CAUSE,
271     INST_TLB_MULTI_HIT_CAUSE,
272     INST_FETCH_PRIVILEGE_CAUSE,
273     INST_FETCH_PROHIBITED_CAUSE = 20,
274     LOAD_STORE_TLB_MISS_CAUSE = 24,
275     LOAD_STORE_TLB_MULTI_HIT_CAUSE,
276     LOAD_STORE_PRIVILEGE_CAUSE,
277     LOAD_PROHIBITED_CAUSE = 28,
278     STORE_PROHIBITED_CAUSE,
279 
280     COPROCESSOR0_DISABLED = 32,
281 };
282 
283 typedef enum {
284     INTTYPE_LEVEL,
285     INTTYPE_EDGE,
286     INTTYPE_NMI,
287     INTTYPE_SOFTWARE,
288     INTTYPE_TIMER,
289     INTTYPE_DEBUG,
290     INTTYPE_WRITE_ERR,
291     INTTYPE_PROFILING,
292     INTTYPE_MAX
293 } interrupt_type;
294 
295 struct CPUXtensaState;
296 
297 typedef struct xtensa_tlb_entry {
298     uint32_t vaddr;
299     uint32_t paddr;
300     uint8_t asid;
301     uint8_t attr;
302     bool variable;
303 } xtensa_tlb_entry;
304 
305 typedef struct xtensa_tlb {
306     unsigned nways;
307     const unsigned way_size[10];
308     bool varway56;
309     unsigned nrefillentries;
310 } xtensa_tlb;
311 
312 typedef struct XtensaGdbReg {
313     int targno;
314     int type;
315     int group;
316     unsigned size;
317 } XtensaGdbReg;
318 
319 typedef struct XtensaGdbRegmap {
320     int num_regs;
321     int num_core_regs;
322     /* PC + a + ar + sr + ur */
323     XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
324 } XtensaGdbRegmap;
325 
326 typedef struct XtensaCcompareTimer {
327     struct CPUXtensaState *env;
328     QEMUTimer *timer;
329 } XtensaCcompareTimer;
330 
331 typedef struct XtensaMemory {
332     unsigned num;
333     struct XtensaMemoryRegion {
334         uint32_t addr;
335         uint32_t size;
336     } location[MAX_NMEMORY];
337 } XtensaMemory;
338 
339 typedef struct DisasContext DisasContext;
340 typedef void (*XtensaOpcodeOp)(DisasContext *dc, const uint32_t arg[],
341                                const uint32_t par[]);
342 
343 typedef struct XtensaOpcodeOps {
344     const char *name;
345     XtensaOpcodeOp translate;
346     const uint32_t *par;
347 } XtensaOpcodeOps;
348 
349 typedef struct XtensaOpcodeTranslators {
350     unsigned num_opcodes;
351     const XtensaOpcodeOps *opcode;
352 } XtensaOpcodeTranslators;
353 
354 extern const XtensaOpcodeTranslators xtensa_core_opcodes;
355 extern const XtensaOpcodeTranslators xtensa_fpu2000_opcodes;
356 
357 struct XtensaConfig {
358     const char *name;
359     uint64_t options;
360     XtensaGdbRegmap gdb_regmap;
361     unsigned nareg;
362     int excm_level;
363     int ndepc;
364     uint32_t vecbase;
365     uint32_t exception_vector[EXC_MAX];
366     unsigned ninterrupt;
367     unsigned nlevel;
368     uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
369     uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
370     uint32_t inttype_mask[INTTYPE_MAX];
371     struct {
372         uint32_t level;
373         interrupt_type inttype;
374     } interrupt[MAX_NINTERRUPT];
375     unsigned nccompare;
376     uint32_t timerint[MAX_NCCOMPARE];
377     unsigned nextint;
378     unsigned extint[MAX_NINTERRUPT];
379 
380     unsigned debug_level;
381     unsigned nibreak;
382     unsigned ndbreak;
383 
384     unsigned icache_ways;
385     unsigned dcache_ways;
386     uint32_t memctl_mask;
387 
388     XtensaMemory instrom;
389     XtensaMemory instram;
390     XtensaMemory datarom;
391     XtensaMemory dataram;
392     XtensaMemory sysrom;
393     XtensaMemory sysram;
394 
395     uint32_t configid[2];
396 
397     void *isa_internal;
398     xtensa_isa isa;
399     XtensaOpcodeOps **opcode_ops;
400     const XtensaOpcodeTranslators **opcode_translators;
401 
402     uint32_t clock_freq_khz;
403 
404     xtensa_tlb itlb;
405     xtensa_tlb dtlb;
406 };
407 
408 typedef struct XtensaConfigList {
409     const XtensaConfig *config;
410     struct XtensaConfigList *next;
411 } XtensaConfigList;
412 
413 #ifdef HOST_WORDS_BIGENDIAN
414 enum {
415     FP_F32_HIGH,
416     FP_F32_LOW,
417 };
418 #else
419 enum {
420     FP_F32_LOW,
421     FP_F32_HIGH,
422 };
423 #endif
424 
425 typedef struct CPUXtensaState {
426     const XtensaConfig *config;
427     uint32_t regs[16];
428     uint32_t pc;
429     uint32_t sregs[256];
430     uint32_t uregs[256];
431     uint32_t phys_regs[MAX_NAREG];
432     union {
433         float32 f32[2];
434         float64 f64;
435     } fregs[16];
436     float_status fp_status;
437 
438     xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
439     xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
440     unsigned autorefill_idx;
441     bool runstall;
442     AddressSpace *address_space_er;
443     MemoryRegion *system_er;
444     int pending_irq_level; /* level of last raised IRQ */
445     void **irq_inputs;
446     XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
447     uint64_t time_base;
448     uint64_t ccount_time;
449     uint32_t ccount_base;
450 
451     int exception_taken;
452     int yield_needed;
453     unsigned static_vectors;
454 
455     /* Watchpoints for DBREAK registers */
456     struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
457 
458     CPU_COMMON
459 } CPUXtensaState;
460 
461 /**
462  * XtensaCPU:
463  * @env: #CPUXtensaState
464  *
465  * An Xtensa CPU.
466  */
467 struct XtensaCPU {
468     /*< private >*/
469     CPUState parent_obj;
470     /*< public >*/
471 
472     CPUXtensaState env;
473 };
474 
475 static inline XtensaCPU *xtensa_env_get_cpu(const CPUXtensaState *env)
476 {
477     return container_of(env, XtensaCPU, env);
478 }
479 
480 #define ENV_GET_CPU(e) CPU(xtensa_env_get_cpu(e))
481 
482 #define ENV_OFFSET offsetof(XtensaCPU, env)
483 
484 void xtensa_cpu_do_interrupt(CPUState *cpu);
485 bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
486 void xtensa_cpu_do_unassigned_access(CPUState *cpu, hwaddr addr,
487                                      bool is_write, bool is_exec, int opaque,
488                                      unsigned size);
489 void xtensa_cpu_dump_state(CPUState *cpu, FILE *f,
490                            fprintf_function cpu_fprintf, int flags);
491 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
492 int xtensa_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
493 int xtensa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
494 void xtensa_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
495                                     MMUAccessType access_type,
496                                     int mmu_idx, uintptr_t retaddr);
497 
498 #define cpu_signal_handler cpu_xtensa_signal_handler
499 #define cpu_list xtensa_cpu_list
500 
501 #define XTENSA_CPU_TYPE_SUFFIX "-" TYPE_XTENSA_CPU
502 #define XTENSA_CPU_TYPE_NAME(model) model XTENSA_CPU_TYPE_SUFFIX
503 
504 #ifdef TARGET_WORDS_BIGENDIAN
505 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
506 #else
507 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
508 #endif
509 #define XTENSA_DEFAULT_CPU_TYPE XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_MODEL)
510 
511 #define cpu_init(cpu_model) cpu_generic_init(TYPE_XTENSA_CPU, cpu_model)
512 
513 void xtensa_translate_init(void);
514 void xtensa_breakpoint_handler(CPUState *cs);
515 void xtensa_finalize_config(XtensaConfig *config);
516 void xtensa_register_core(XtensaConfigList *node);
517 void xtensa_sim_open_console(Chardev *chr);
518 void check_interrupts(CPUXtensaState *s);
519 void xtensa_irq_init(CPUXtensaState *env);
520 void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
521 void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
522 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
523 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
524 void xtensa_sync_window_from_phys(CPUXtensaState *env);
525 void xtensa_sync_phys_from_window(CPUXtensaState *env);
526 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env, bool dtlb, uint32_t way);
527 void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
528         uint32_t *vpn, uint32_t wi, uint32_t *ei);
529 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
530         uint32_t *pwi, uint32_t *pei, uint8_t *pring);
531 void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
532         xtensa_tlb_entry *entry, bool dtlb,
533         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
534 void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
535         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
536 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
537         uint32_t vaddr, int is_write, int mmu_idx,
538         uint32_t *paddr, uint32_t *page_size, unsigned *access);
539 void reset_mmu(CPUXtensaState *env);
540 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
541 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
542 static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
543 {
544     return env->system_er;
545 }
546 
547 static inline void xtensa_select_static_vectors(CPUXtensaState *env,
548                                                 unsigned n)
549 {
550     assert(n < 2);
551     env->static_vectors = n;
552 }
553 void xtensa_runstall(CPUXtensaState *env, bool runstall);
554 XtensaOpcodeOps *xtensa_find_opcode_ops(const XtensaOpcodeTranslators *t,
555                                         const char *opcode);
556 
557 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
558 #define XTENSA_OPTION_ALL (~(uint64_t)0)
559 
560 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
561         uint64_t opt)
562 {
563     return (config->options & opt) != 0;
564 }
565 
566 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
567 {
568     return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
569 }
570 
571 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
572 {
573     int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
574     if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
575         level = env->config->excm_level;
576     }
577     return level;
578 }
579 
580 static inline int xtensa_get_ring(const CPUXtensaState *env)
581 {
582     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
583         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
584     } else {
585         return 0;
586     }
587 }
588 
589 static inline int xtensa_get_cring(const CPUXtensaState *env)
590 {
591     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
592             (env->sregs[PS] & PS_EXCM) == 0) {
593         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
594     } else {
595         return 0;
596     }
597 }
598 
599 static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
600         bool dtlb, unsigned wi, unsigned ei)
601 {
602     return dtlb ?
603         env->dtlb[wi] + ei :
604         env->itlb[wi] + ei;
605 }
606 
607 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
608 {
609     return env->sregs[WINDOW_START] |
610         (env->sregs[WINDOW_START] << env->config->nareg / 4);
611 }
612 
613 /* MMU modes definitions */
614 #define MMU_MODE0_SUFFIX _ring0
615 #define MMU_MODE1_SUFFIX _ring1
616 #define MMU_MODE2_SUFFIX _ring2
617 #define MMU_MODE3_SUFFIX _ring3
618 
619 static inline int cpu_mmu_index(CPUXtensaState *env, bool ifetch)
620 {
621     return xtensa_get_cring(env);
622 }
623 
624 #define XTENSA_TBFLAG_RING_MASK 0x3
625 #define XTENSA_TBFLAG_EXCM 0x4
626 #define XTENSA_TBFLAG_LITBASE 0x8
627 #define XTENSA_TBFLAG_DEBUG 0x10
628 #define XTENSA_TBFLAG_ICOUNT 0x20
629 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
630 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
631 #define XTENSA_TBFLAG_EXCEPTION 0x4000
632 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
633 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
634 #define XTENSA_TBFLAG_YIELD 0x20000
635 
636 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
637         target_ulong *cs_base, uint32_t *flags)
638 {
639     CPUState *cs = CPU(xtensa_env_get_cpu(env));
640 
641     *pc = env->pc;
642     *cs_base = 0;
643     *flags = 0;
644     *flags |= xtensa_get_ring(env);
645     if (env->sregs[PS] & PS_EXCM) {
646         *flags |= XTENSA_TBFLAG_EXCM;
647     }
648     if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
649             (env->sregs[LITBASE] & 1)) {
650         *flags |= XTENSA_TBFLAG_LITBASE;
651     }
652     if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
653         if (xtensa_get_cintlevel(env) < env->config->debug_level) {
654             *flags |= XTENSA_TBFLAG_DEBUG;
655         }
656         if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
657             *flags |= XTENSA_TBFLAG_ICOUNT;
658         }
659     }
660     if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
661         *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
662     }
663     if (cs->singlestep_enabled && env->exception_taken) {
664         *flags |= XTENSA_TBFLAG_EXCEPTION;
665     }
666     if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
667         (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
668         uint32_t windowstart = xtensa_replicate_windowstart(env) >>
669             (env->sregs[WINDOW_BASE] + 1);
670         uint32_t w = ctz32(windowstart | 0x8);
671 
672         *flags |= w << XTENSA_TBFLAG_WINDOW_SHIFT;
673     } else {
674         *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
675     }
676     if (env->yield_needed) {
677         *flags |= XTENSA_TBFLAG_YIELD;
678     }
679 }
680 
681 #include "exec/cpu-all.h"
682 
683 #endif
684