xref: /openbmc/qemu/target/xtensa/cpu.h (revision 0ec7b3e7) 
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 
41 #define NB_MMU_MODES 4
42 
43 #define TARGET_PHYS_ADDR_SPACE_BITS 32
44 #define TARGET_VIRT_ADDR_SPACE_BITS 32
45 #define TARGET_PAGE_BITS 12
46 
47 enum {
48     /* Additional instructions */
49     XTENSA_OPTION_CODE_DENSITY,
50     XTENSA_OPTION_LOOP,
51     XTENSA_OPTION_EXTENDED_L32R,
52     XTENSA_OPTION_16_BIT_IMUL,
53     XTENSA_OPTION_32_BIT_IMUL,
54     XTENSA_OPTION_32_BIT_IMUL_HIGH,
55     XTENSA_OPTION_32_BIT_IDIV,
56     XTENSA_OPTION_MAC16,
57     XTENSA_OPTION_MISC_OP_NSA,
58     XTENSA_OPTION_MISC_OP_MINMAX,
59     XTENSA_OPTION_MISC_OP_SEXT,
60     XTENSA_OPTION_MISC_OP_CLAMPS,
61     XTENSA_OPTION_COPROCESSOR,
62     XTENSA_OPTION_BOOLEAN,
63     XTENSA_OPTION_FP_COPROCESSOR,
64     XTENSA_OPTION_MP_SYNCHRO,
65     XTENSA_OPTION_CONDITIONAL_STORE,
66     XTENSA_OPTION_ATOMCTL,
67     XTENSA_OPTION_DEPBITS,
68 
69     /* Interrupts and exceptions */
70     XTENSA_OPTION_EXCEPTION,
71     XTENSA_OPTION_RELOCATABLE_VECTOR,
72     XTENSA_OPTION_UNALIGNED_EXCEPTION,
73     XTENSA_OPTION_INTERRUPT,
74     XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
75     XTENSA_OPTION_TIMER_INTERRUPT,
76 
77     /* Local memory */
78     XTENSA_OPTION_ICACHE,
79     XTENSA_OPTION_ICACHE_TEST,
80     XTENSA_OPTION_ICACHE_INDEX_LOCK,
81     XTENSA_OPTION_DCACHE,
82     XTENSA_OPTION_DCACHE_TEST,
83     XTENSA_OPTION_DCACHE_INDEX_LOCK,
84     XTENSA_OPTION_IRAM,
85     XTENSA_OPTION_IROM,
86     XTENSA_OPTION_DRAM,
87     XTENSA_OPTION_DROM,
88     XTENSA_OPTION_XLMI,
89     XTENSA_OPTION_HW_ALIGNMENT,
90     XTENSA_OPTION_MEMORY_ECC_PARITY,
91 
92     /* Memory protection and translation */
93     XTENSA_OPTION_REGION_PROTECTION,
94     XTENSA_OPTION_REGION_TRANSLATION,
95     XTENSA_OPTION_MMU,
96     XTENSA_OPTION_CACHEATTR,
97 
98     /* Other */
99     XTENSA_OPTION_WINDOWED_REGISTER,
100     XTENSA_OPTION_PROCESSOR_INTERFACE,
101     XTENSA_OPTION_MISC_SR,
102     XTENSA_OPTION_THREAD_POINTER,
103     XTENSA_OPTION_PROCESSOR_ID,
104     XTENSA_OPTION_DEBUG,
105     XTENSA_OPTION_TRACE_PORT,
106     XTENSA_OPTION_EXTERN_REGS,
107 };
108 
109 enum {
110     THREADPTR = 231,
111     FCR = 232,
112     FSR = 233,
113 };
114 
115 enum {
116     LBEG = 0,
117     LEND = 1,
118     LCOUNT = 2,
119     SAR = 3,
120     BR = 4,
121     LITBASE = 5,
122     SCOMPARE1 = 12,
123     ACCLO = 16,
124     ACCHI = 17,
125     MR = 32,
126     WINDOW_BASE = 72,
127     WINDOW_START = 73,
128     PTEVADDR = 83,
129     RASID = 90,
130     ITLBCFG = 91,
131     DTLBCFG = 92,
132     IBREAKENABLE = 96,
133     MEMCTL = 97,
134     CACHEATTR = 98,
135     ATOMCTL = 99,
136     IBREAKA = 128,
137     DBREAKA = 144,
138     DBREAKC = 160,
139     CONFIGID0 = 176,
140     EPC1 = 177,
141     DEPC = 192,
142     EPS2 = 194,
143     CONFIGID1 = 208,
144     EXCSAVE1 = 209,
145     CPENABLE = 224,
146     INTSET = 226,
147     INTCLEAR = 227,
148     INTENABLE = 228,
149     PS = 230,
150     VECBASE = 231,
151     EXCCAUSE = 232,
152     DEBUGCAUSE = 233,
153     CCOUNT = 234,
154     PRID = 235,
155     ICOUNT = 236,
156     ICOUNTLEVEL = 237,
157     EXCVADDR = 238,
158     CCOMPARE = 240,
159     MISC = 244,
160 };
161 
162 #define PS_INTLEVEL 0xf
163 #define PS_INTLEVEL_SHIFT 0
164 
165 #define PS_EXCM 0x10
166 #define PS_UM 0x20
167 
168 #define PS_RING 0xc0
169 #define PS_RING_SHIFT 6
170 
171 #define PS_OWB 0xf00
172 #define PS_OWB_SHIFT 8
173 
174 #define PS_CALLINC 0x30000
175 #define PS_CALLINC_SHIFT 16
176 #define PS_CALLINC_LEN 2
177 
178 #define PS_WOE 0x40000
179 
180 #define DEBUGCAUSE_IC 0x1
181 #define DEBUGCAUSE_IB 0x2
182 #define DEBUGCAUSE_DB 0x4
183 #define DEBUGCAUSE_BI 0x8
184 #define DEBUGCAUSE_BN 0x10
185 #define DEBUGCAUSE_DI 0x20
186 #define DEBUGCAUSE_DBNUM 0xf00
187 #define DEBUGCAUSE_DBNUM_SHIFT 8
188 
189 #define DBREAKC_SB 0x80000000
190 #define DBREAKC_LB 0x40000000
191 #define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
192 #define DBREAKC_MASK 0x3f
193 
194 #define MEMCTL_INIT 0x00800000
195 #define MEMCTL_IUSEWAYS_SHIFT 18
196 #define MEMCTL_IUSEWAYS_LEN 5
197 #define MEMCTL_IUSEWAYS_MASK 0x007c0000
198 #define MEMCTL_DALLOCWAYS_SHIFT 13
199 #define MEMCTL_DALLOCWAYS_LEN 5
200 #define MEMCTL_DALLOCWAYS_MASK 0x0003e000
201 #define MEMCTL_DUSEWAYS_SHIFT 8
202 #define MEMCTL_DUSEWAYS_LEN 5
203 #define MEMCTL_DUSEWAYS_MASK 0x00001f00
204 #define MEMCTL_ISNP 0x4
205 #define MEMCTL_DSNP 0x2
206 #define MEMCTL_IL0EN 0x1
207 
208 #define MAX_NAREG 64
209 #define MAX_NINTERRUPT 32
210 #define MAX_NLEVEL 6
211 #define MAX_NNMI 1
212 #define MAX_NCCOMPARE 3
213 #define MAX_TLB_WAY_SIZE 8
214 #define MAX_NDBREAK 2
215 
216 #define REGION_PAGE_MASK 0xe0000000
217 
218 #define PAGE_CACHE_MASK    0x700
219 #define PAGE_CACHE_SHIFT   8
220 #define PAGE_CACHE_INVALID 0x000
221 #define PAGE_CACHE_BYPASS  0x100
222 #define PAGE_CACHE_WT      0x200
223 #define PAGE_CACHE_WB      0x400
224 #define PAGE_CACHE_ISOLATE 0x600
225 
226 enum {
227     /* Static vectors */
228     EXC_RESET0,
229     EXC_RESET1,
230     EXC_MEMORY_ERROR,
231 
232     /* Dynamic vectors */
233     EXC_WINDOW_OVERFLOW4,
234     EXC_WINDOW_UNDERFLOW4,
235     EXC_WINDOW_OVERFLOW8,
236     EXC_WINDOW_UNDERFLOW8,
237     EXC_WINDOW_OVERFLOW12,
238     EXC_WINDOW_UNDERFLOW12,
239     EXC_IRQ,
240     EXC_KERNEL,
241     EXC_USER,
242     EXC_DOUBLE,
243     EXC_DEBUG,
244     EXC_MAX
245 };
246 
247 enum {
248     ILLEGAL_INSTRUCTION_CAUSE = 0,
249     SYSCALL_CAUSE,
250     INSTRUCTION_FETCH_ERROR_CAUSE,
251     LOAD_STORE_ERROR_CAUSE,
252     LEVEL1_INTERRUPT_CAUSE,
253     ALLOCA_CAUSE,
254     INTEGER_DIVIDE_BY_ZERO_CAUSE,
255     PRIVILEGED_CAUSE = 8,
256     LOAD_STORE_ALIGNMENT_CAUSE,
257 
258     INSTR_PIF_DATA_ERROR_CAUSE = 12,
259     LOAD_STORE_PIF_DATA_ERROR_CAUSE,
260     INSTR_PIF_ADDR_ERROR_CAUSE,
261     LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
262 
263     INST_TLB_MISS_CAUSE,
264     INST_TLB_MULTI_HIT_CAUSE,
265     INST_FETCH_PRIVILEGE_CAUSE,
266     INST_FETCH_PROHIBITED_CAUSE = 20,
267     LOAD_STORE_TLB_MISS_CAUSE = 24,
268     LOAD_STORE_TLB_MULTI_HIT_CAUSE,
269     LOAD_STORE_PRIVILEGE_CAUSE,
270     LOAD_PROHIBITED_CAUSE = 28,
271     STORE_PROHIBITED_CAUSE,
272 
273     COPROCESSOR0_DISABLED = 32,
274 };
275 
276 typedef enum {
277     INTTYPE_LEVEL,
278     INTTYPE_EDGE,
279     INTTYPE_NMI,
280     INTTYPE_SOFTWARE,
281     INTTYPE_TIMER,
282     INTTYPE_DEBUG,
283     INTTYPE_WRITE_ERR,
284     INTTYPE_PROFILING,
285     INTTYPE_MAX
286 } interrupt_type;
287 
288 struct CPUXtensaState;
289 
290 typedef struct xtensa_tlb_entry {
291     uint32_t vaddr;
292     uint32_t paddr;
293     uint8_t asid;
294     uint8_t attr;
295     bool variable;
296 } xtensa_tlb_entry;
297 
298 typedef struct xtensa_tlb {
299     unsigned nways;
300     const unsigned way_size[10];
301     bool varway56;
302     unsigned nrefillentries;
303 } xtensa_tlb;
304 
305 typedef struct XtensaGdbReg {
306     int targno;
307     int type;
308     int group;
309     unsigned size;
310 } XtensaGdbReg;
311 
312 typedef struct XtensaGdbRegmap {
313     int num_regs;
314     int num_core_regs;
315     /* PC + a + ar + sr + ur */
316     XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
317 } XtensaGdbRegmap;
318 
319 typedef struct XtensaCcompareTimer {
320     struct CPUXtensaState *env;
321     QEMUTimer *timer;
322 } XtensaCcompareTimer;
323 
324 struct XtensaConfig {
325     const char *name;
326     uint64_t options;
327     XtensaGdbRegmap gdb_regmap;
328     unsigned nareg;
329     int excm_level;
330     int ndepc;
331     uint32_t vecbase;
332     uint32_t exception_vector[EXC_MAX];
333     unsigned ninterrupt;
334     unsigned nlevel;
335     uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
336     uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
337     uint32_t inttype_mask[INTTYPE_MAX];
338     struct {
339         uint32_t level;
340         interrupt_type inttype;
341     } interrupt[MAX_NINTERRUPT];
342     unsigned nccompare;
343     uint32_t timerint[MAX_NCCOMPARE];
344     unsigned nextint;
345     unsigned extint[MAX_NINTERRUPT];
346 
347     unsigned debug_level;
348     unsigned nibreak;
349     unsigned ndbreak;
350 
351     unsigned icache_ways;
352     unsigned dcache_ways;
353     uint32_t memctl_mask;
354 
355     uint32_t configid[2];
356 
357     uint32_t clock_freq_khz;
358 
359     xtensa_tlb itlb;
360     xtensa_tlb dtlb;
361 };
362 
363 typedef struct XtensaConfigList {
364     const XtensaConfig *config;
365     struct XtensaConfigList *next;
366 } XtensaConfigList;
367 
368 #ifdef HOST_WORDS_BIGENDIAN
369 enum {
370     FP_F32_HIGH,
371     FP_F32_LOW,
372 };
373 #else
374 enum {
375     FP_F32_LOW,
376     FP_F32_HIGH,
377 };
378 #endif
379 
380 typedef struct CPUXtensaState {
381     const XtensaConfig *config;
382     uint32_t regs[16];
383     uint32_t pc;
384     uint32_t sregs[256];
385     uint32_t uregs[256];
386     uint32_t phys_regs[MAX_NAREG];
387     union {
388         float32 f32[2];
389         float64 f64;
390     } fregs[16];
391     float_status fp_status;
392 
393     xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
394     xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
395     unsigned autorefill_idx;
396     bool runstall;
397     AddressSpace *address_space_er;
398     MemoryRegion *system_er;
399     int pending_irq_level; /* level of last raised IRQ */
400     void **irq_inputs;
401     XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
402     uint64_t time_base;
403     uint64_t ccount_time;
404     uint32_t ccount_base;
405 
406     int exception_taken;
407     int yield_needed;
408     unsigned static_vectors;
409 
410     /* Watchpoints for DBREAK registers */
411     struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
412 
413     CPU_COMMON
414 } CPUXtensaState;
415 
416 /**
417  * XtensaCPU:
418  * @env: #CPUXtensaState
419  *
420  * An Xtensa CPU.
421  */
422 struct XtensaCPU {
423     /*< private >*/
424     CPUState parent_obj;
425     /*< public >*/
426 
427     CPUXtensaState env;
428 };
429 
430 static inline XtensaCPU *xtensa_env_get_cpu(const CPUXtensaState *env)
431 {
432     return container_of(env, XtensaCPU, env);
433 }
434 
435 #define ENV_GET_CPU(e) CPU(xtensa_env_get_cpu(e))
436 
437 #define ENV_OFFSET offsetof(XtensaCPU, env)
438 
439 void xtensa_cpu_do_interrupt(CPUState *cpu);
440 bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
441 void xtensa_cpu_do_unassigned_access(CPUState *cpu, hwaddr addr,
442                                      bool is_write, bool is_exec, int opaque,
443                                      unsigned size);
444 void xtensa_cpu_dump_state(CPUState *cpu, FILE *f,
445                            fprintf_function cpu_fprintf, int flags);
446 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
447 int xtensa_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
448 int xtensa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
449 void xtensa_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
450                                     MMUAccessType access_type,
451                                     int mmu_idx, uintptr_t retaddr);
452 
453 #define cpu_signal_handler cpu_xtensa_signal_handler
454 #define cpu_list xtensa_cpu_list
455 
456 #ifdef TARGET_WORDS_BIGENDIAN
457 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
458 #else
459 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
460 #endif
461 
462 XtensaCPU *cpu_xtensa_init(const char *cpu_model);
463 
464 #define cpu_init(cpu_model) CPU(cpu_xtensa_init(cpu_model))
465 
466 void xtensa_translate_init(void);
467 void xtensa_breakpoint_handler(CPUState *cs);
468 void xtensa_finalize_config(XtensaConfig *config);
469 void xtensa_register_core(XtensaConfigList *node);
470 void check_interrupts(CPUXtensaState *s);
471 void xtensa_irq_init(CPUXtensaState *env);
472 void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
473 void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
474 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
475 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
476 void xtensa_sync_window_from_phys(CPUXtensaState *env);
477 void xtensa_sync_phys_from_window(CPUXtensaState *env);
478 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env, bool dtlb, uint32_t way);
479 void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
480         uint32_t *vpn, uint32_t wi, uint32_t *ei);
481 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
482         uint32_t *pwi, uint32_t *pei, uint8_t *pring);
483 void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
484         xtensa_tlb_entry *entry, bool dtlb,
485         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
486 void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
487         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
488 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
489         uint32_t vaddr, int is_write, int mmu_idx,
490         uint32_t *paddr, uint32_t *page_size, unsigned *access);
491 void reset_mmu(CPUXtensaState *env);
492 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
493 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
494 static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
495 {
496     return env->system_er;
497 }
498 
499 static inline void xtensa_select_static_vectors(CPUXtensaState *env,
500                                                 unsigned n)
501 {
502     assert(n < 2);
503     env->static_vectors = n;
504 }
505 void xtensa_runstall(CPUXtensaState *env, bool runstall);
506 
507 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
508 #define XTENSA_OPTION_ALL (~(uint64_t)0)
509 
510 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
511         uint64_t opt)
512 {
513     return (config->options & opt) != 0;
514 }
515 
516 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
517 {
518     return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
519 }
520 
521 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
522 {
523     int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
524     if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
525         level = env->config->excm_level;
526     }
527     return level;
528 }
529 
530 static inline int xtensa_get_ring(const CPUXtensaState *env)
531 {
532     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
533         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
534     } else {
535         return 0;
536     }
537 }
538 
539 static inline int xtensa_get_cring(const CPUXtensaState *env)
540 {
541     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
542             (env->sregs[PS] & PS_EXCM) == 0) {
543         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
544     } else {
545         return 0;
546     }
547 }
548 
549 static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
550         bool dtlb, unsigned wi, unsigned ei)
551 {
552     return dtlb ?
553         env->dtlb[wi] + ei :
554         env->itlb[wi] + ei;
555 }
556 
557 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
558 {
559     return env->sregs[WINDOW_START] |
560         (env->sregs[WINDOW_START] << env->config->nareg / 4);
561 }
562 
563 /* MMU modes definitions */
564 #define MMU_MODE0_SUFFIX _ring0
565 #define MMU_MODE1_SUFFIX _ring1
566 #define MMU_MODE2_SUFFIX _ring2
567 #define MMU_MODE3_SUFFIX _ring3
568 
569 static inline int cpu_mmu_index(CPUXtensaState *env, bool ifetch)
570 {
571     return xtensa_get_cring(env);
572 }
573 
574 #define XTENSA_TBFLAG_RING_MASK 0x3
575 #define XTENSA_TBFLAG_EXCM 0x4
576 #define XTENSA_TBFLAG_LITBASE 0x8
577 #define XTENSA_TBFLAG_DEBUG 0x10
578 #define XTENSA_TBFLAG_ICOUNT 0x20
579 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
580 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
581 #define XTENSA_TBFLAG_EXCEPTION 0x4000
582 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
583 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
584 #define XTENSA_TBFLAG_YIELD 0x20000
585 
586 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
587         target_ulong *cs_base, uint32_t *flags)
588 {
589     CPUState *cs = CPU(xtensa_env_get_cpu(env));
590 
591     *pc = env->pc;
592     *cs_base = 0;
593     *flags = 0;
594     *flags |= xtensa_get_ring(env);
595     if (env->sregs[PS] & PS_EXCM) {
596         *flags |= XTENSA_TBFLAG_EXCM;
597     }
598     if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
599             (env->sregs[LITBASE] & 1)) {
600         *flags |= XTENSA_TBFLAG_LITBASE;
601     }
602     if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
603         if (xtensa_get_cintlevel(env) < env->config->debug_level) {
604             *flags |= XTENSA_TBFLAG_DEBUG;
605         }
606         if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
607             *flags |= XTENSA_TBFLAG_ICOUNT;
608         }
609     }
610     if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
611         *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
612     }
613     if (cs->singlestep_enabled && env->exception_taken) {
614         *flags |= XTENSA_TBFLAG_EXCEPTION;
615     }
616     if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
617         (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
618         uint32_t windowstart = xtensa_replicate_windowstart(env) >>
619             (env->sregs[WINDOW_BASE] + 1);
620         uint32_t w = ctz32(windowstart | 0x8);
621 
622         *flags |= w << XTENSA_TBFLAG_WINDOW_SHIFT;
623     } else {
624         *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
625     }
626     if (env->yield_needed) {
627         *flags |= XTENSA_TBFLAG_YIELD;
628     }
629 }
630 
631 #include "exec/cpu-all.h"
632 
633 #endif
634