xref: /qemu/target/xtensa/cpu.h (revision 6402cbbb) 
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 #define MAX_NMEMORY 4
216 
217 #define REGION_PAGE_MASK 0xe0000000
218 
219 #define PAGE_CACHE_MASK    0x700
220 #define PAGE_CACHE_SHIFT   8
221 #define PAGE_CACHE_INVALID 0x000
222 #define PAGE_CACHE_BYPASS  0x100
223 #define PAGE_CACHE_WT      0x200
224 #define PAGE_CACHE_WB      0x400
225 #define PAGE_CACHE_ISOLATE 0x600
226 
227 enum {
228     /* Static vectors */
229     EXC_RESET0,
230     EXC_RESET1,
231     EXC_MEMORY_ERROR,
232 
233     /* Dynamic vectors */
234     EXC_WINDOW_OVERFLOW4,
235     EXC_WINDOW_UNDERFLOW4,
236     EXC_WINDOW_OVERFLOW8,
237     EXC_WINDOW_UNDERFLOW8,
238     EXC_WINDOW_OVERFLOW12,
239     EXC_WINDOW_UNDERFLOW12,
240     EXC_IRQ,
241     EXC_KERNEL,
242     EXC_USER,
243     EXC_DOUBLE,
244     EXC_DEBUG,
245     EXC_MAX
246 };
247 
248 enum {
249     ILLEGAL_INSTRUCTION_CAUSE = 0,
250     SYSCALL_CAUSE,
251     INSTRUCTION_FETCH_ERROR_CAUSE,
252     LOAD_STORE_ERROR_CAUSE,
253     LEVEL1_INTERRUPT_CAUSE,
254     ALLOCA_CAUSE,
255     INTEGER_DIVIDE_BY_ZERO_CAUSE,
256     PRIVILEGED_CAUSE = 8,
257     LOAD_STORE_ALIGNMENT_CAUSE,
258 
259     INSTR_PIF_DATA_ERROR_CAUSE = 12,
260     LOAD_STORE_PIF_DATA_ERROR_CAUSE,
261     INSTR_PIF_ADDR_ERROR_CAUSE,
262     LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
263 
264     INST_TLB_MISS_CAUSE,
265     INST_TLB_MULTI_HIT_CAUSE,
266     INST_FETCH_PRIVILEGE_CAUSE,
267     INST_FETCH_PROHIBITED_CAUSE = 20,
268     LOAD_STORE_TLB_MISS_CAUSE = 24,
269     LOAD_STORE_TLB_MULTI_HIT_CAUSE,
270     LOAD_STORE_PRIVILEGE_CAUSE,
271     LOAD_PROHIBITED_CAUSE = 28,
272     STORE_PROHIBITED_CAUSE,
273 
274     COPROCESSOR0_DISABLED = 32,
275 };
276 
277 typedef enum {
278     INTTYPE_LEVEL,
279     INTTYPE_EDGE,
280     INTTYPE_NMI,
281     INTTYPE_SOFTWARE,
282     INTTYPE_TIMER,
283     INTTYPE_DEBUG,
284     INTTYPE_WRITE_ERR,
285     INTTYPE_PROFILING,
286     INTTYPE_MAX
287 } interrupt_type;
288 
289 struct CPUXtensaState;
290 
291 typedef struct xtensa_tlb_entry {
292     uint32_t vaddr;
293     uint32_t paddr;
294     uint8_t asid;
295     uint8_t attr;
296     bool variable;
297 } xtensa_tlb_entry;
298 
299 typedef struct xtensa_tlb {
300     unsigned nways;
301     const unsigned way_size[10];
302     bool varway56;
303     unsigned nrefillentries;
304 } xtensa_tlb;
305 
306 typedef struct XtensaGdbReg {
307     int targno;
308     int type;
309     int group;
310     unsigned size;
311 } XtensaGdbReg;
312 
313 typedef struct XtensaGdbRegmap {
314     int num_regs;
315     int num_core_regs;
316     /* PC + a + ar + sr + ur */
317     XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
318 } XtensaGdbRegmap;
319 
320 typedef struct XtensaCcompareTimer {
321     struct CPUXtensaState *env;
322     QEMUTimer *timer;
323 } XtensaCcompareTimer;
324 
325 typedef struct XtensaMemory {
326     unsigned num;
327     struct XtensaMemoryRegion {
328         uint32_t addr;
329         uint32_t size;
330     } location[MAX_NMEMORY];
331 } XtensaMemory;
332 
333 struct XtensaConfig {
334     const char *name;
335     uint64_t options;
336     XtensaGdbRegmap gdb_regmap;
337     unsigned nareg;
338     int excm_level;
339     int ndepc;
340     uint32_t vecbase;
341     uint32_t exception_vector[EXC_MAX];
342     unsigned ninterrupt;
343     unsigned nlevel;
344     uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
345     uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
346     uint32_t inttype_mask[INTTYPE_MAX];
347     struct {
348         uint32_t level;
349         interrupt_type inttype;
350     } interrupt[MAX_NINTERRUPT];
351     unsigned nccompare;
352     uint32_t timerint[MAX_NCCOMPARE];
353     unsigned nextint;
354     unsigned extint[MAX_NINTERRUPT];
355 
356     unsigned debug_level;
357     unsigned nibreak;
358     unsigned ndbreak;
359 
360     unsigned icache_ways;
361     unsigned dcache_ways;
362     uint32_t memctl_mask;
363 
364     XtensaMemory instrom;
365     XtensaMemory instram;
366     XtensaMemory datarom;
367     XtensaMemory dataram;
368     XtensaMemory sysrom;
369     XtensaMemory sysram;
370 
371     uint32_t configid[2];
372 
373     uint32_t clock_freq_khz;
374 
375     xtensa_tlb itlb;
376     xtensa_tlb dtlb;
377 };
378 
379 typedef struct XtensaConfigList {
380     const XtensaConfig *config;
381     struct XtensaConfigList *next;
382 } XtensaConfigList;
383 
384 #ifdef HOST_WORDS_BIGENDIAN
385 enum {
386     FP_F32_HIGH,
387     FP_F32_LOW,
388 };
389 #else
390 enum {
391     FP_F32_LOW,
392     FP_F32_HIGH,
393 };
394 #endif
395 
396 typedef struct CPUXtensaState {
397     const XtensaConfig *config;
398     uint32_t regs[16];
399     uint32_t pc;
400     uint32_t sregs[256];
401     uint32_t uregs[256];
402     uint32_t phys_regs[MAX_NAREG];
403     union {
404         float32 f32[2];
405         float64 f64;
406     } fregs[16];
407     float_status fp_status;
408 
409     xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
410     xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
411     unsigned autorefill_idx;
412     bool runstall;
413     AddressSpace *address_space_er;
414     MemoryRegion *system_er;
415     int pending_irq_level; /* level of last raised IRQ */
416     void **irq_inputs;
417     XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
418     uint64_t time_base;
419     uint64_t ccount_time;
420     uint32_t ccount_base;
421 
422     int exception_taken;
423     int yield_needed;
424     unsigned static_vectors;
425 
426     /* Watchpoints for DBREAK registers */
427     struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
428 
429     CPU_COMMON
430 } CPUXtensaState;
431 
432 /**
433  * XtensaCPU:
434  * @env: #CPUXtensaState
435  *
436  * An Xtensa CPU.
437  */
438 struct XtensaCPU {
439     /*< private >*/
440     CPUState parent_obj;
441     /*< public >*/
442 
443     CPUXtensaState env;
444 };
445 
446 static inline XtensaCPU *xtensa_env_get_cpu(const CPUXtensaState *env)
447 {
448     return container_of(env, XtensaCPU, env);
449 }
450 
451 #define ENV_GET_CPU(e) CPU(xtensa_env_get_cpu(e))
452 
453 #define ENV_OFFSET offsetof(XtensaCPU, env)
454 
455 void xtensa_cpu_do_interrupt(CPUState *cpu);
456 bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
457 void xtensa_cpu_do_unassigned_access(CPUState *cpu, hwaddr addr,
458                                      bool is_write, bool is_exec, int opaque,
459                                      unsigned size);
460 void xtensa_cpu_dump_state(CPUState *cpu, FILE *f,
461                            fprintf_function cpu_fprintf, int flags);
462 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
463 int xtensa_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
464 int xtensa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
465 void xtensa_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
466                                     MMUAccessType access_type,
467                                     int mmu_idx, uintptr_t retaddr);
468 
469 #define cpu_signal_handler cpu_xtensa_signal_handler
470 #define cpu_list xtensa_cpu_list
471 
472 #ifdef TARGET_WORDS_BIGENDIAN
473 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
474 #else
475 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
476 #endif
477 
478 XtensaCPU *cpu_xtensa_init(const char *cpu_model);
479 
480 #define cpu_init(cpu_model) CPU(cpu_xtensa_init(cpu_model))
481 
482 void xtensa_translate_init(void);
483 void xtensa_breakpoint_handler(CPUState *cs);
484 void xtensa_finalize_config(XtensaConfig *config);
485 void xtensa_register_core(XtensaConfigList *node);
486 void xtensa_sim_open_console(Chardev *chr);
487 void check_interrupts(CPUXtensaState *s);
488 void xtensa_irq_init(CPUXtensaState *env);
489 void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
490 void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
491 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
492 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
493 void xtensa_sync_window_from_phys(CPUXtensaState *env);
494 void xtensa_sync_phys_from_window(CPUXtensaState *env);
495 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env, bool dtlb, uint32_t way);
496 void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
497         uint32_t *vpn, uint32_t wi, uint32_t *ei);
498 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
499         uint32_t *pwi, uint32_t *pei, uint8_t *pring);
500 void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
501         xtensa_tlb_entry *entry, bool dtlb,
502         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
503 void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
504         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
505 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
506         uint32_t vaddr, int is_write, int mmu_idx,
507         uint32_t *paddr, uint32_t *page_size, unsigned *access);
508 void reset_mmu(CPUXtensaState *env);
509 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
510 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
511 static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
512 {
513     return env->system_er;
514 }
515 
516 static inline void xtensa_select_static_vectors(CPUXtensaState *env,
517                                                 unsigned n)
518 {
519     assert(n < 2);
520     env->static_vectors = n;
521 }
522 void xtensa_runstall(CPUXtensaState *env, bool runstall);
523 
524 #define XTENSA_OPTION_BIT(opt) (((uint64_t)1) << (opt))
525 #define XTENSA_OPTION_ALL (~(uint64_t)0)
526 
527 static inline bool xtensa_option_bits_enabled(const XtensaConfig *config,
528         uint64_t opt)
529 {
530     return (config->options & opt) != 0;
531 }
532 
533 static inline bool xtensa_option_enabled(const XtensaConfig *config, int opt)
534 {
535     return xtensa_option_bits_enabled(config, XTENSA_OPTION_BIT(opt));
536 }
537 
538 static inline int xtensa_get_cintlevel(const CPUXtensaState *env)
539 {
540     int level = (env->sregs[PS] & PS_INTLEVEL) >> PS_INTLEVEL_SHIFT;
541     if ((env->sregs[PS] & PS_EXCM) && env->config->excm_level > level) {
542         level = env->config->excm_level;
543     }
544     return level;
545 }
546 
547 static inline int xtensa_get_ring(const CPUXtensaState *env)
548 {
549     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU)) {
550         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
551     } else {
552         return 0;
553     }
554 }
555 
556 static inline int xtensa_get_cring(const CPUXtensaState *env)
557 {
558     if (xtensa_option_enabled(env->config, XTENSA_OPTION_MMU) &&
559             (env->sregs[PS] & PS_EXCM) == 0) {
560         return (env->sregs[PS] & PS_RING) >> PS_RING_SHIFT;
561     } else {
562         return 0;
563     }
564 }
565 
566 static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
567         bool dtlb, unsigned wi, unsigned ei)
568 {
569     return dtlb ?
570         env->dtlb[wi] + ei :
571         env->itlb[wi] + ei;
572 }
573 
574 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
575 {
576     return env->sregs[WINDOW_START] |
577         (env->sregs[WINDOW_START] << env->config->nareg / 4);
578 }
579 
580 /* MMU modes definitions */
581 #define MMU_MODE0_SUFFIX _ring0
582 #define MMU_MODE1_SUFFIX _ring1
583 #define MMU_MODE2_SUFFIX _ring2
584 #define MMU_MODE3_SUFFIX _ring3
585 
586 static inline int cpu_mmu_index(CPUXtensaState *env, bool ifetch)
587 {
588     return xtensa_get_cring(env);
589 }
590 
591 #define XTENSA_TBFLAG_RING_MASK 0x3
592 #define XTENSA_TBFLAG_EXCM 0x4
593 #define XTENSA_TBFLAG_LITBASE 0x8
594 #define XTENSA_TBFLAG_DEBUG 0x10
595 #define XTENSA_TBFLAG_ICOUNT 0x20
596 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
597 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
598 #define XTENSA_TBFLAG_EXCEPTION 0x4000
599 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
600 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
601 #define XTENSA_TBFLAG_YIELD 0x20000
602 
603 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
604         target_ulong *cs_base, uint32_t *flags)
605 {
606     CPUState *cs = CPU(xtensa_env_get_cpu(env));
607 
608     *pc = env->pc;
609     *cs_base = 0;
610     *flags = 0;
611     *flags |= xtensa_get_ring(env);
612     if (env->sregs[PS] & PS_EXCM) {
613         *flags |= XTENSA_TBFLAG_EXCM;
614     }
615     if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
616             (env->sregs[LITBASE] & 1)) {
617         *flags |= XTENSA_TBFLAG_LITBASE;
618     }
619     if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
620         if (xtensa_get_cintlevel(env) < env->config->debug_level) {
621             *flags |= XTENSA_TBFLAG_DEBUG;
622         }
623         if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
624             *flags |= XTENSA_TBFLAG_ICOUNT;
625         }
626     }
627     if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
628         *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
629     }
630     if (cs->singlestep_enabled && env->exception_taken) {
631         *flags |= XTENSA_TBFLAG_EXCEPTION;
632     }
633     if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
634         (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
635         uint32_t windowstart = xtensa_replicate_windowstart(env) >>
636             (env->sregs[WINDOW_BASE] + 1);
637         uint32_t w = ctz32(windowstart | 0x8);
638 
639         *flags |= w << XTENSA_TBFLAG_WINDOW_SHIFT;
640     } else {
641         *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
642     }
643     if (env->yield_needed) {
644         *flags |= XTENSA_TBFLAG_YIELD;
645     }
646 }
647 
648 #include "exec/cpu-all.h"
649 
650 #endif
651