xref: /openbmc/qemu/target/xtensa/cpu.h (revision fe7f9b8e) 
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 /* Xtensa processors have a weak memory model */
35 #define TCG_GUEST_DEFAULT_MO      (0)
36 
37 #define CPUArchState struct CPUXtensaState
38 
39 #include "qemu-common.h"
40 #include "cpu-qom.h"
41 #include "exec/cpu-defs.h"
42 #include "xtensa-isa.h"
43 
44 #define NB_MMU_MODES 4
45 
46 #define TARGET_PHYS_ADDR_SPACE_BITS 32
47 #ifdef CONFIG_USER_ONLY
48 #define TARGET_VIRT_ADDR_SPACE_BITS 30
49 #else
50 #define TARGET_VIRT_ADDR_SPACE_BITS 32
51 #endif
52 #define TARGET_PAGE_BITS 12
53 
54 enum {
55     /* Additional instructions */
56     XTENSA_OPTION_CODE_DENSITY,
57     XTENSA_OPTION_LOOP,
58     XTENSA_OPTION_EXTENDED_L32R,
59     XTENSA_OPTION_16_BIT_IMUL,
60     XTENSA_OPTION_32_BIT_IMUL,
61     XTENSA_OPTION_32_BIT_IMUL_HIGH,
62     XTENSA_OPTION_32_BIT_IDIV,
63     XTENSA_OPTION_MAC16,
64     XTENSA_OPTION_MISC_OP_NSA,
65     XTENSA_OPTION_MISC_OP_MINMAX,
66     XTENSA_OPTION_MISC_OP_SEXT,
67     XTENSA_OPTION_MISC_OP_CLAMPS,
68     XTENSA_OPTION_COPROCESSOR,
69     XTENSA_OPTION_BOOLEAN,
70     XTENSA_OPTION_FP_COPROCESSOR,
71     XTENSA_OPTION_MP_SYNCHRO,
72     XTENSA_OPTION_CONDITIONAL_STORE,
73     XTENSA_OPTION_ATOMCTL,
74     XTENSA_OPTION_DEPBITS,
75 
76     /* Interrupts and exceptions */
77     XTENSA_OPTION_EXCEPTION,
78     XTENSA_OPTION_RELOCATABLE_VECTOR,
79     XTENSA_OPTION_UNALIGNED_EXCEPTION,
80     XTENSA_OPTION_INTERRUPT,
81     XTENSA_OPTION_HIGH_PRIORITY_INTERRUPT,
82     XTENSA_OPTION_TIMER_INTERRUPT,
83 
84     /* Local memory */
85     XTENSA_OPTION_ICACHE,
86     XTENSA_OPTION_ICACHE_TEST,
87     XTENSA_OPTION_ICACHE_INDEX_LOCK,
88     XTENSA_OPTION_DCACHE,
89     XTENSA_OPTION_DCACHE_TEST,
90     XTENSA_OPTION_DCACHE_INDEX_LOCK,
91     XTENSA_OPTION_IRAM,
92     XTENSA_OPTION_IROM,
93     XTENSA_OPTION_DRAM,
94     XTENSA_OPTION_DROM,
95     XTENSA_OPTION_XLMI,
96     XTENSA_OPTION_HW_ALIGNMENT,
97     XTENSA_OPTION_MEMORY_ECC_PARITY,
98 
99     /* Memory protection and translation */
100     XTENSA_OPTION_REGION_PROTECTION,
101     XTENSA_OPTION_REGION_TRANSLATION,
102     XTENSA_OPTION_MMU,
103     XTENSA_OPTION_CACHEATTR,
104 
105     /* Other */
106     XTENSA_OPTION_WINDOWED_REGISTER,
107     XTENSA_OPTION_PROCESSOR_INTERFACE,
108     XTENSA_OPTION_MISC_SR,
109     XTENSA_OPTION_THREAD_POINTER,
110     XTENSA_OPTION_PROCESSOR_ID,
111     XTENSA_OPTION_DEBUG,
112     XTENSA_OPTION_TRACE_PORT,
113     XTENSA_OPTION_EXTERN_REGS,
114 };
115 
116 enum {
117     EXPSTATE = 230,
118     THREADPTR = 231,
119     FCR = 232,
120     FSR = 233,
121 };
122 
123 enum {
124     LBEG = 0,
125     LEND = 1,
126     LCOUNT = 2,
127     SAR = 3,
128     BR = 4,
129     LITBASE = 5,
130     SCOMPARE1 = 12,
131     ACCLO = 16,
132     ACCHI = 17,
133     MR = 32,
134     WINDOW_BASE = 72,
135     WINDOW_START = 73,
136     PTEVADDR = 83,
137     MMID = 89,
138     RASID = 90,
139     ITLBCFG = 91,
140     DTLBCFG = 92,
141     IBREAKENABLE = 96,
142     MEMCTL = 97,
143     CACHEATTR = 98,
144     ATOMCTL = 99,
145     DDR = 104,
146     IBREAKA = 128,
147     DBREAKA = 144,
148     DBREAKC = 160,
149     CONFIGID0 = 176,
150     EPC1 = 177,
151     DEPC = 192,
152     EPS2 = 194,
153     CONFIGID1 = 208,
154     EXCSAVE1 = 209,
155     CPENABLE = 224,
156     INTSET = 226,
157     INTCLEAR = 227,
158     INTENABLE = 228,
159     PS = 230,
160     VECBASE = 231,
161     EXCCAUSE = 232,
162     DEBUGCAUSE = 233,
163     CCOUNT = 234,
164     PRID = 235,
165     ICOUNT = 236,
166     ICOUNTLEVEL = 237,
167     EXCVADDR = 238,
168     CCOMPARE = 240,
169     MISC = 244,
170 };
171 
172 #define PS_INTLEVEL 0xf
173 #define PS_INTLEVEL_SHIFT 0
174 
175 #define PS_EXCM 0x10
176 #define PS_UM 0x20
177 
178 #define PS_RING 0xc0
179 #define PS_RING_SHIFT 6
180 
181 #define PS_OWB 0xf00
182 #define PS_OWB_SHIFT 8
183 #define PS_OWB_LEN 4
184 
185 #define PS_CALLINC 0x30000
186 #define PS_CALLINC_SHIFT 16
187 #define PS_CALLINC_LEN 2
188 
189 #define PS_WOE 0x40000
190 
191 #define DEBUGCAUSE_IC 0x1
192 #define DEBUGCAUSE_IB 0x2
193 #define DEBUGCAUSE_DB 0x4
194 #define DEBUGCAUSE_BI 0x8
195 #define DEBUGCAUSE_BN 0x10
196 #define DEBUGCAUSE_DI 0x20
197 #define DEBUGCAUSE_DBNUM 0xf00
198 #define DEBUGCAUSE_DBNUM_SHIFT 8
199 
200 #define DBREAKC_SB 0x80000000
201 #define DBREAKC_LB 0x40000000
202 #define DBREAKC_SB_LB (DBREAKC_SB | DBREAKC_LB)
203 #define DBREAKC_MASK 0x3f
204 
205 #define MEMCTL_INIT 0x00800000
206 #define MEMCTL_IUSEWAYS_SHIFT 18
207 #define MEMCTL_IUSEWAYS_LEN 5
208 #define MEMCTL_IUSEWAYS_MASK 0x007c0000
209 #define MEMCTL_DALLOCWAYS_SHIFT 13
210 #define MEMCTL_DALLOCWAYS_LEN 5
211 #define MEMCTL_DALLOCWAYS_MASK 0x0003e000
212 #define MEMCTL_DUSEWAYS_SHIFT 8
213 #define MEMCTL_DUSEWAYS_LEN 5
214 #define MEMCTL_DUSEWAYS_MASK 0x00001f00
215 #define MEMCTL_ISNP 0x4
216 #define MEMCTL_DSNP 0x2
217 #define MEMCTL_IL0EN 0x1
218 
219 #define MAX_INSN_LENGTH 64
220 #define MAX_OPCODE_ARGS 16
221 #define MAX_NAREG 64
222 #define MAX_NINTERRUPT 32
223 #define MAX_NLEVEL 6
224 #define MAX_NNMI 1
225 #define MAX_NCCOMPARE 3
226 #define MAX_TLB_WAY_SIZE 8
227 #define MAX_NDBREAK 2
228 #define MAX_NMEMORY 4
229 
230 #define REGION_PAGE_MASK 0xe0000000
231 
232 #define PAGE_CACHE_MASK    0x700
233 #define PAGE_CACHE_SHIFT   8
234 #define PAGE_CACHE_INVALID 0x000
235 #define PAGE_CACHE_BYPASS  0x100
236 #define PAGE_CACHE_WT      0x200
237 #define PAGE_CACHE_WB      0x400
238 #define PAGE_CACHE_ISOLATE 0x600
239 
240 enum {
241     /* Static vectors */
242     EXC_RESET0,
243     EXC_RESET1,
244     EXC_MEMORY_ERROR,
245 
246     /* Dynamic vectors */
247     EXC_WINDOW_OVERFLOW4,
248     EXC_WINDOW_UNDERFLOW4,
249     EXC_WINDOW_OVERFLOW8,
250     EXC_WINDOW_UNDERFLOW8,
251     EXC_WINDOW_OVERFLOW12,
252     EXC_WINDOW_UNDERFLOW12,
253     EXC_IRQ,
254     EXC_KERNEL,
255     EXC_USER,
256     EXC_DOUBLE,
257     EXC_DEBUG,
258     EXC_MAX
259 };
260 
261 enum {
262     ILLEGAL_INSTRUCTION_CAUSE = 0,
263     SYSCALL_CAUSE,
264     INSTRUCTION_FETCH_ERROR_CAUSE,
265     LOAD_STORE_ERROR_CAUSE,
266     LEVEL1_INTERRUPT_CAUSE,
267     ALLOCA_CAUSE,
268     INTEGER_DIVIDE_BY_ZERO_CAUSE,
269     PRIVILEGED_CAUSE = 8,
270     LOAD_STORE_ALIGNMENT_CAUSE,
271 
272     INSTR_PIF_DATA_ERROR_CAUSE = 12,
273     LOAD_STORE_PIF_DATA_ERROR_CAUSE,
274     INSTR_PIF_ADDR_ERROR_CAUSE,
275     LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
276 
277     INST_TLB_MISS_CAUSE,
278     INST_TLB_MULTI_HIT_CAUSE,
279     INST_FETCH_PRIVILEGE_CAUSE,
280     INST_FETCH_PROHIBITED_CAUSE = 20,
281     LOAD_STORE_TLB_MISS_CAUSE = 24,
282     LOAD_STORE_TLB_MULTI_HIT_CAUSE,
283     LOAD_STORE_PRIVILEGE_CAUSE,
284     LOAD_PROHIBITED_CAUSE = 28,
285     STORE_PROHIBITED_CAUSE,
286 
287     COPROCESSOR0_DISABLED = 32,
288 };
289 
290 typedef enum {
291     INTTYPE_LEVEL,
292     INTTYPE_EDGE,
293     INTTYPE_NMI,
294     INTTYPE_SOFTWARE,
295     INTTYPE_TIMER,
296     INTTYPE_DEBUG,
297     INTTYPE_WRITE_ERR,
298     INTTYPE_PROFILING,
299     INTTYPE_MAX
300 } interrupt_type;
301 
302 struct CPUXtensaState;
303 
304 typedef struct xtensa_tlb_entry {
305     uint32_t vaddr;
306     uint32_t paddr;
307     uint8_t asid;
308     uint8_t attr;
309     bool variable;
310 } xtensa_tlb_entry;
311 
312 typedef struct xtensa_tlb {
313     unsigned nways;
314     const unsigned way_size[10];
315     bool varway56;
316     unsigned nrefillentries;
317 } xtensa_tlb;
318 
319 typedef struct XtensaGdbReg {
320     int targno;
321     unsigned flags;
322     int type;
323     int group;
324     unsigned size;
325 } XtensaGdbReg;
326 
327 typedef struct XtensaGdbRegmap {
328     int num_regs;
329     int num_core_regs;
330     /* PC + a + ar + sr + ur */
331     XtensaGdbReg reg[1 + 16 + 64 + 256 + 256];
332 } XtensaGdbRegmap;
333 
334 typedef struct XtensaCcompareTimer {
335     struct CPUXtensaState *env;
336     QEMUTimer *timer;
337 } XtensaCcompareTimer;
338 
339 typedef struct XtensaMemory {
340     unsigned num;
341     struct XtensaMemoryRegion {
342         uint32_t addr;
343         uint32_t size;
344     } location[MAX_NMEMORY];
345 } XtensaMemory;
346 
347 typedef struct DisasContext DisasContext;
348 typedef void (*XtensaOpcodeOp)(DisasContext *dc, const uint32_t arg[],
349                                const uint32_t par[]);
350 
351 typedef struct XtensaOpcodeOps {
352     const char *name;
353     XtensaOpcodeOp translate;
354     const uint32_t *par;
355 } XtensaOpcodeOps;
356 
357 typedef struct XtensaOpcodeTranslators {
358     unsigned num_opcodes;
359     const XtensaOpcodeOps *opcode;
360 } XtensaOpcodeTranslators;
361 
362 extern const XtensaOpcodeTranslators xtensa_core_opcodes;
363 extern const XtensaOpcodeTranslators xtensa_fpu2000_opcodes;
364 
365 struct XtensaConfig {
366     const char *name;
367     uint64_t options;
368     XtensaGdbRegmap gdb_regmap;
369     unsigned nareg;
370     int excm_level;
371     int ndepc;
372     uint32_t vecbase;
373     uint32_t exception_vector[EXC_MAX];
374     unsigned ninterrupt;
375     unsigned nlevel;
376     uint32_t interrupt_vector[MAX_NLEVEL + MAX_NNMI + 1];
377     uint32_t level_mask[MAX_NLEVEL + MAX_NNMI + 1];
378     uint32_t inttype_mask[INTTYPE_MAX];
379     struct {
380         uint32_t level;
381         interrupt_type inttype;
382     } interrupt[MAX_NINTERRUPT];
383     unsigned nccompare;
384     uint32_t timerint[MAX_NCCOMPARE];
385     unsigned nextint;
386     unsigned extint[MAX_NINTERRUPT];
387 
388     unsigned debug_level;
389     unsigned nibreak;
390     unsigned ndbreak;
391 
392     unsigned icache_ways;
393     unsigned dcache_ways;
394     uint32_t memctl_mask;
395 
396     XtensaMemory instrom;
397     XtensaMemory instram;
398     XtensaMemory datarom;
399     XtensaMemory dataram;
400     XtensaMemory sysrom;
401     XtensaMemory sysram;
402 
403     uint32_t configid[2];
404 
405     void *isa_internal;
406     xtensa_isa isa;
407     XtensaOpcodeOps **opcode_ops;
408     const XtensaOpcodeTranslators **opcode_translators;
409 
410     uint32_t clock_freq_khz;
411 
412     xtensa_tlb itlb;
413     xtensa_tlb dtlb;
414 };
415 
416 typedef struct XtensaConfigList {
417     const XtensaConfig *config;
418     struct XtensaConfigList *next;
419 } XtensaConfigList;
420 
421 #ifdef HOST_WORDS_BIGENDIAN
422 enum {
423     FP_F32_HIGH,
424     FP_F32_LOW,
425 };
426 #else
427 enum {
428     FP_F32_LOW,
429     FP_F32_HIGH,
430 };
431 #endif
432 
433 typedef struct CPUXtensaState {
434     const XtensaConfig *config;
435     uint32_t regs[16];
436     uint32_t pc;
437     uint32_t sregs[256];
438     uint32_t uregs[256];
439     uint32_t phys_regs[MAX_NAREG];
440     union {
441         float32 f32[2];
442         float64 f64;
443     } fregs[16];
444     float_status fp_status;
445 
446 #ifndef CONFIG_USER_ONLY
447     xtensa_tlb_entry itlb[7][MAX_TLB_WAY_SIZE];
448     xtensa_tlb_entry dtlb[10][MAX_TLB_WAY_SIZE];
449     unsigned autorefill_idx;
450     bool runstall;
451     AddressSpace *address_space_er;
452     MemoryRegion *system_er;
453     int pending_irq_level; /* level of last raised IRQ */
454     void **irq_inputs;
455     XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
456     uint64_t time_base;
457     uint64_t ccount_time;
458     uint32_t ccount_base;
459 #endif
460 
461     int exception_taken;
462     int yield_needed;
463     unsigned static_vectors;
464 
465     /* Watchpoints for DBREAK registers */
466     struct CPUWatchpoint *cpu_watchpoint[MAX_NDBREAK];
467 
468     CPU_COMMON
469 } CPUXtensaState;
470 
471 /**
472  * XtensaCPU:
473  * @env: #CPUXtensaState
474  *
475  * An Xtensa CPU.
476  */
477 struct XtensaCPU {
478     /*< private >*/
479     CPUState parent_obj;
480     /*< public >*/
481 
482     CPUXtensaState env;
483 };
484 
485 static inline XtensaCPU *xtensa_env_get_cpu(const CPUXtensaState *env)
486 {
487     return container_of(env, XtensaCPU, env);
488 }
489 
490 #define ENV_GET_CPU(e) CPU(xtensa_env_get_cpu(e))
491 
492 #define ENV_OFFSET offsetof(XtensaCPU, env)
493 
494 
495 int xtensa_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw, int size,
496                                 int mmu_idx);
497 void xtensa_cpu_do_interrupt(CPUState *cpu);
498 bool xtensa_cpu_exec_interrupt(CPUState *cpu, int interrupt_request);
499 void xtensa_cpu_do_unassigned_access(CPUState *cpu, hwaddr addr,
500                                      bool is_write, bool is_exec, int opaque,
501                                      unsigned size);
502 void xtensa_cpu_dump_state(CPUState *cpu, FILE *f,
503                            fprintf_function cpu_fprintf, int flags);
504 hwaddr xtensa_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
505 int xtensa_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
506 int xtensa_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
507 void xtensa_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
508                                     MMUAccessType access_type,
509                                     int mmu_idx, uintptr_t retaddr);
510 
511 #define cpu_signal_handler cpu_xtensa_signal_handler
512 #define cpu_list xtensa_cpu_list
513 
514 #define XTENSA_CPU_TYPE_SUFFIX "-" TYPE_XTENSA_CPU
515 #define XTENSA_CPU_TYPE_NAME(model) model XTENSA_CPU_TYPE_SUFFIX
516 #define CPU_RESOLVING_TYPE TYPE_XTENSA_CPU
517 
518 #ifdef TARGET_WORDS_BIGENDIAN
519 #define XTENSA_DEFAULT_CPU_MODEL "fsf"
520 #define XTENSA_DEFAULT_CPU_NOMMU_MODEL "fsf"
521 #else
522 #define XTENSA_DEFAULT_CPU_MODEL "dc232b"
523 #define XTENSA_DEFAULT_CPU_NOMMU_MODEL "de212"
524 #endif
525 #define XTENSA_DEFAULT_CPU_TYPE \
526     XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_MODEL)
527 #define XTENSA_DEFAULT_CPU_NOMMU_TYPE \
528     XTENSA_CPU_TYPE_NAME(XTENSA_DEFAULT_CPU_NOMMU_MODEL)
529 
530 void xtensa_translate_init(void);
531 void xtensa_breakpoint_handler(CPUState *cs);
532 void xtensa_finalize_config(XtensaConfig *config);
533 void xtensa_register_core(XtensaConfigList *node);
534 void xtensa_sim_open_console(Chardev *chr);
535 void check_interrupts(CPUXtensaState *s);
536 void xtensa_irq_init(CPUXtensaState *env);
537 void *xtensa_get_extint(CPUXtensaState *env, unsigned extint);
538 void xtensa_timer_irq(CPUXtensaState *env, uint32_t id, uint32_t active);
539 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
540 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
541 void xtensa_sync_window_from_phys(CPUXtensaState *env);
542 void xtensa_sync_phys_from_window(CPUXtensaState *env);
543 void xtensa_rotate_window(CPUXtensaState *env, uint32_t delta);
544 void xtensa_restore_owb(CPUXtensaState *env);
545 void debug_exception_env(CPUXtensaState *new_env, uint32_t cause);
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 #ifndef CONFIG_USER_ONLY
600 uint32_t xtensa_tlb_get_addr_mask(const CPUXtensaState *env,
601                                   bool dtlb, uint32_t way);
602 void split_tlb_entry_spec_way(const CPUXtensaState *env, uint32_t v, bool dtlb,
603         uint32_t *vpn, uint32_t wi, uint32_t *ei);
604 int xtensa_tlb_lookup(const CPUXtensaState *env, uint32_t addr, bool dtlb,
605         uint32_t *pwi, uint32_t *pei, uint8_t *pring);
606 void xtensa_tlb_set_entry_mmu(const CPUXtensaState *env,
607         xtensa_tlb_entry *entry, bool dtlb,
608         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
609 void xtensa_tlb_set_entry(CPUXtensaState *env, bool dtlb,
610         unsigned wi, unsigned ei, uint32_t vpn, uint32_t pte);
611 int xtensa_get_physical_addr(CPUXtensaState *env, bool update_tlb,
612         uint32_t vaddr, int is_write, int mmu_idx,
613         uint32_t *paddr, uint32_t *page_size, unsigned *access);
614 void reset_mmu(CPUXtensaState *env);
615 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUXtensaState *env);
616 
617 static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env)
618 {
619     return env->system_er;
620 }
621 
622 static inline xtensa_tlb_entry *xtensa_tlb_get_entry(CPUXtensaState *env,
623         bool dtlb, unsigned wi, unsigned ei)
624 {
625     return dtlb ?
626         env->dtlb[wi] + ei :
627         env->itlb[wi] + ei;
628 }
629 #endif
630 
631 static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env)
632 {
633     return env->sregs[WINDOW_START] |
634         (env->sregs[WINDOW_START] << env->config->nareg / 4);
635 }
636 
637 /* MMU modes definitions */
638 #define MMU_MODE0_SUFFIX _ring0
639 #define MMU_MODE1_SUFFIX _ring1
640 #define MMU_MODE2_SUFFIX _ring2
641 #define MMU_MODE3_SUFFIX _ring3
642 #define MMU_USER_IDX 3
643 
644 static inline int cpu_mmu_index(CPUXtensaState *env, bool ifetch)
645 {
646     return xtensa_get_cring(env);
647 }
648 
649 #define XTENSA_TBFLAG_RING_MASK 0x3
650 #define XTENSA_TBFLAG_EXCM 0x4
651 #define XTENSA_TBFLAG_LITBASE 0x8
652 #define XTENSA_TBFLAG_DEBUG 0x10
653 #define XTENSA_TBFLAG_ICOUNT 0x20
654 #define XTENSA_TBFLAG_CPENABLE_MASK 0x3fc0
655 #define XTENSA_TBFLAG_CPENABLE_SHIFT 6
656 #define XTENSA_TBFLAG_EXCEPTION 0x4000
657 #define XTENSA_TBFLAG_WINDOW_MASK 0x18000
658 #define XTENSA_TBFLAG_WINDOW_SHIFT 15
659 #define XTENSA_TBFLAG_YIELD 0x20000
660 
661 static inline void cpu_get_tb_cpu_state(CPUXtensaState *env, target_ulong *pc,
662         target_ulong *cs_base, uint32_t *flags)
663 {
664     CPUState *cs = CPU(xtensa_env_get_cpu(env));
665 
666     *pc = env->pc;
667     *cs_base = 0;
668     *flags = 0;
669     *flags |= xtensa_get_ring(env);
670     if (env->sregs[PS] & PS_EXCM) {
671         *flags |= XTENSA_TBFLAG_EXCM;
672     }
673     if (xtensa_option_enabled(env->config, XTENSA_OPTION_EXTENDED_L32R) &&
674             (env->sregs[LITBASE] & 1)) {
675         *flags |= XTENSA_TBFLAG_LITBASE;
676     }
677     if (xtensa_option_enabled(env->config, XTENSA_OPTION_DEBUG)) {
678         if (xtensa_get_cintlevel(env) < env->config->debug_level) {
679             *flags |= XTENSA_TBFLAG_DEBUG;
680         }
681         if (xtensa_get_cintlevel(env) < env->sregs[ICOUNTLEVEL]) {
682             *flags |= XTENSA_TBFLAG_ICOUNT;
683         }
684     }
685     if (xtensa_option_enabled(env->config, XTENSA_OPTION_COPROCESSOR)) {
686         *flags |= env->sregs[CPENABLE] << XTENSA_TBFLAG_CPENABLE_SHIFT;
687     }
688     if (cs->singlestep_enabled && env->exception_taken) {
689         *flags |= XTENSA_TBFLAG_EXCEPTION;
690     }
691     if (xtensa_option_enabled(env->config, XTENSA_OPTION_WINDOWED_REGISTER) &&
692         (env->sregs[PS] & (PS_WOE | PS_EXCM)) == PS_WOE) {
693         uint32_t windowstart = xtensa_replicate_windowstart(env) >>
694             (env->sregs[WINDOW_BASE] + 1);
695         uint32_t w = ctz32(windowstart | 0x8);
696 
697         *flags |= w << XTENSA_TBFLAG_WINDOW_SHIFT;
698     } else {
699         *flags |= 3 << XTENSA_TBFLAG_WINDOW_SHIFT;
700     }
701     if (env->yield_needed) {
702         *flags |= XTENSA_TBFLAG_YIELD;
703     }
704 }
705 
706 #include "exec/cpu-all.h"
707 
708 #endif
709